CN110242582A - Pump installation - Google Patents

Abstract

The present invention provides a kind of pump installation, when drainage hole is arranged on the shell for constituting pump chamber, is able to suppress the strength reduction of the sidewall sections of shell, and bubble is not easy accumulation in drainage hole.Pump installation (1) is formed with pump chamber (9) between shell (7) and shell (8).Drainage hole (42) is open in bottom surface (90) rather than is open in the inner peripheral surface of pump chamber (91).Drainage hole is connect with the inside opening portion (43) for being set to bottom surface, is radially extended in the position biased on axis direction (Z) relative to pump chamber.Therefore, despite the structure for making drainage hole (42) be open in the side (82) of shell, but can be to avoid the strength reduction of the sidewall sections of shell (8).In addition, inside opening portion (43) have the inclined surface (431) connecting with bottom surface (90) with the obtuse-angulate angle of shape, therefore, bubble accumulation is able to suppress in drainage hole (42).Therefore, the generation of cacophonia or the reduction of pump characteristics, the damage of impeller (2) can be inhibited.

Description

Pump installation

Technical field

The present invention relates to the pump installations that drainage hole is equipped on the shell for forming pump chamber.

Background technique

In the non-self contained pump installation for making the impeller rotation for being configured at pump chamber by motor, remain in order to prevent The liquid of pump chamber freezes, and is equipped with drainage hole (dewatering orifice) on the shell for constituting pump chamber.In existing pump installation, drainage hole is set In the inner peripheral surface (radial face) of pump chamber.Drainage hole (drain plug is set in the bottom surface of pump chamber in addition, disclosing in patent document 1 Hole) the pump installation of recirculated water is discharged.

Existing technical literature

Patent document

Patent document 1: No. 4168474 bulletins of Japanese Patent Publication No.

Summary of the invention

The technical problems to be solved by the invention

In the case where drainage hole is arranged in the inner peripheral surface of pump chamber, the strong of the sidewall sections of the shell of the peripheral side of pump chamber is surrounded Degree is reduced because drainage hole is arranged.Therefore, in order to avoid the reduction of the compressive resistance of shell, it is necessary to thicken the sidewall portion of shell The wall thickness of the axis direction divided and the wall thickness in the direction orthogonal with axis direction.Therefore, in the pump installation of high voltage, there are difficulties To realize the axis direction of the sidewall sections of shell and the slimming in the direction orthogonal with axis direction, it is difficult to minimize shell The problem of.

On the other hand, as patent document 1, drainage hole can also be set rather than inner peripheral surface in the bottom surface of pump chamber.? In this case, because drainage hole is not penetrated the sidewall sections of shell, it can be avoided the intensity drop of the sidewall sections of shell It is low.But in the case where drainage hole is arranged in the bottom surface of pump chamber, since drainage hole is pumping the indoor flow direction with recirculated water Orthogonal direction opening, so bubble is likely to accumulate in drainage hole.When bubble is accumulated in drainage hole, it is possible to create cacophonia Or pump characteristics reduces, the damage of impeller.

In view of the above problems, technical problem of the invention is to provide a kind of pump installation, on the shell for constituting pump chamber When drainage hole is set, it is able to suppress the strength reduction of the sidewall sections of shell, and bubble is not easy to be accumulated in drainage hole.

Technical solution used by solving the problems, such as

In order to solve the above technical problem, the present invention provides a kind of pump installations, have the shell for constituting pump chamber, are configured at The impeller of the pump chamber, the motor for making the impeller rotation, which is characterized in that be provided on the housing and the pump chamber The suction inlet and outlet of connection and the drainage hole configured on the direction different from the outlet, the inner surface of the pump chamber Has bottom surface opposed with the impeller in the axial direction, the drainage hole connects with the inside opening portion for being set to the bottom surface It connects, the inside opening portion has inclined surface, and the inclined surface is relative to the bottom surface with the obtuse-angulate angle connection of shape.

In pump installation of the invention, because drainage hole is open in bottom opening rather than in the inner peripheral surface of pump chamber, It may be configured as drainage hole and do not penetrate through the sidewall sections for surrounding the shell of peripheral side of pump chamber.Therefore, it can be avoided the side wall of shell Partial intensity is reduced because drainage hole is arranged.Therefore, can be realized the sidewall sections of shell axis direction and with axis side Slimming to orthogonal direction, and the deformation or damage of shell caused by the internal pressure of pump chamber can be inhibited.In addition, drainage hole It is connect with the inside opening portion for the bottom surface for being set to pump chamber, inside opening portion has and bottom surface is inclined with what the obtuse-angulate angle of shape connected Inclined-plane.Therefore, even if bubble reaches inside opening portion, bubble is also flowed readily along inclined surface, therefore, although opening up in bottom surface Drainage hole, but bubble can be inhibited to be accumulated in drainage hole.Therefore, generation or the pump of cacophonia caused by bubble are able to suppress The reduction of characteristic, the damage of impeller.

In the present invention, it is generally desirable to, the inside opening portion is formed at the recess portion of the bottom surface, the diameter of the recess portion Inner surface inwardly is the inclined surface, and the drainage hole is open in the inner surface of the radial outside of the recess portion.In this way, only It wants the inner surface of the radial outside of drainage hole and recess portion to connect, then drainage hole can be made inclined in the axial direction relative to pump chamber The position set radially extends.Therefore, despite the structure for making drainage hole be open radially, but can be to avoid the side of shell The strength reduction of wall part.In addition, when pump installation is arranged in such a way that drainage hole becomes the downward direction of vertical, inclined surface at Therefore bubble can be inhibited to be accumulated in drainage hole for face acclivitous above the vertical direction of drainage hole.

In the present invention, it is generally desirable to, the inclined surface is connected with the planar portions for being parallel to the bottom surface.In this way, inside Opening portion forms the shape for having the bottom surface (planar portions) being connected with inclined surface.It therefore, can in the mold for being used to form shell The shape of point is formed to avoid the front end for the mould parts for being used to form inside opening portion.It is accordingly possible to ensure mould parts Intensity.

In the present invention, it is generally desirable to, the inner surface in the inside opening portion and the interconnecting piece of the bottom surface are radiussed. In this way, the mould parts for being used to form inside opening portion can be easily manufactured in the mold for being used to form shell.In addition, Flow path when draining from pump chamber via inside opening portion can be reduced to lose.

In the present invention, it is generally desirable to, the shell has relative to the bottom surface on the axis direction towards phase The end face tossed about, the end face have the multiple ribs extended radially centered on the suction inlet, and the multiple rib is extremely Few one is set to the position that the drainage hole extends.In such manner, it is possible to improve the intensity to form the part of bottom of pump chamber by rib. In addition, can reinforce being formed the position of drainage hole by rib.Therefore, be able to suppress shell caused by the internal pressure of pump chamber deformation or Damage.

In the present invention, it is generally desirable to, the pump installation has the metal plate being fixed on the shell, the metal plate It is abutted with the front end face of the multiple rib.In such manner, it is possible to inhibit the deformation of shell by metal plate, therefore pump chamber can be inhibited The deformation or damage of shell caused by internal pressure.

In the present invention, it is generally desirable to, the shell has towards the side of radial outside and outstanding from the side Drainage hole forming portion is formed with the extension connecting with the drainage hole forming portion in the side.In such manner, it is possible to reinforce draining Hole forming portion can reduce to avoid the intensity of the sidewall sections of shell because drainage hole is arranged.Therefore, the interior of pump chamber can be inhibited Pressure leads to the deformation or damage of shell.

Invention effect

According to the present invention, because drainage hole is not in the inner peripheral surface of pump chamber and in bottom opening, can be configured to drain Hole does not penetrate through the sidewall sections of shell in the peripheral side of pump chamber.Therefore, it can be avoided the side for leading to shell because drainage hole is arranged The strength reduction of wall part.Therefore, can be realized the sidewall sections of shell axis direction and the direction orthogonal with axis direction Slimming, be able to suppress the deformation or damage of shell caused by the internal pressure of pump chamber.In addition, drainage hole and the inside for being set to bottom surface Opening portion connection, the inclined surface that inside opening portion has to connect with the obtuse-angulate angle of bottom surface shape.Therefore, even if bubble reaches Inside opening portion, bubble are also flowed readily along inclined surface, therefore, despite the structure for offering drainage hole in bottom surface, still Bubble can be inhibited to be accumulated in drainage hole.Therefore, the generation of cacophonia caused by bubble or the reduction of pump characteristics are able to suppress And the damage of impeller.

Detailed description of the invention

Fig. 1 is the stereoscopic figure for applying the pump installation and drain plug of embodiments of the present invention 1.

Fig. 2 is the exploded perspective view from the unilateral observation of the axis direction of the pump installation of embodiment 1.

Fig. 3 is the exploded perspective view from the other side of the axis direction of the pump installation of embodiment 1.

Fig. 4 is the pump installation of embodiment 1 and the cross-sectional view of drain plug.

Fig. 5 is the perspective view of circuit substrate, stator and partition wall member from the other side of axis direction.

Fig. 6 is the perspective view of shell.

Fig. 7 is the bottom view and top view of shell.

Fig. 8 is the stereoscopic figure of the pump installation of embodiment 2.

Fig. 9 is the main view of the pump installation of embodiment 2.

Figure 10 is the cross-sectional view of the pump installation of embodiment 2.

Description of symbols

1,1A ... pump installation, 2 ... impellers, 3 ... motor, 4 ... circuit substrates, 5 ... rotors, 6 ... stators, 7 ... shell (shells Body ontology), 8,8A ... shell, 9 ... pump chambers, 10 ... seal members, 11 ... partition wall members, 11a ... cylindrical portion, 11b ... flange part, The bottom 11c ..., 11d ... annular convex, 11h ... axis maintaining part, the fixed protrusion of 11j ..., 11k ... positioning protrusion, 12 ... trees Rouge seal member, 13 ... screws, 14 ... driving magnet, 15 ... sleeves, 16 ... holding members, 16a ... lip portions, 17 ... are fixed Axis, 18 ... thrust bearing parts, 19 ... connectors, 20 ... suction inlets, 21 ... suction passage forming portions, 22 ... suction passages, 23 ... driving with coils, 24 ... stator cores, the periphery 24a ... ring portion, 24b ... salient pole portion, 25 ... insulators, 26 ... terminal pins, 30 ... outlets, 31 ... discharge duct forming portions, 32 ... discharge duct, 40 ... discharge outlet, 41 ... drainage hole forming portions, 42 ... rows Water hole, 43 ... inside opening portions, 44 ... the conical surfaces, 60 ... metal plates, 61 ... upper surface opposed portion, 62 ... side opposed portion, 63 ... Metal plate fixation hole, 64 ... round holes, 80 ... enclosure body portions, 81 ... end faces, 82 ... sides, 83 ... circular recesses, 84 ... rings Shape end face, 85 ... cricoid ribs, 86, the radial rib of 86a, 86b, 86c ..., 87 ... cast gate marks, 88 ... fixation holes, 89 ... peaces Dress portion, 90 ... bottom surfaces, 91 ... inner peripheral surfaces, 92 ... groove portions, 100 ... drain plugs, 101 ... axle portions, 102 ... seal members, 190 ... spiral shells Silk, 191 ... nuts, 192 ... screw fixed parts, 193 ... through holes, 431 ... inclined surface, 432 ... radial outsides inner surface, 433,434 ... circumferential inner surfaces, 435 ... bottom surfaces (planar portions), 436 ... corner portions, 811 ... frame portions, 821 ... extensions, 822 ... weight loss departments, 831 ... circular step portions, 832 ... inner recess, C ... imaginary center line, Z ... axis direction.

Specific embodiment

Hereinafter, being described with reference to apply the embodiment of pump installation of the invention.

[embodiment 1]

(overall structure)

Fig. 1 is the stereoscopic figure for applying the pump installation 1 and drain plug 100 of embodiments of the present invention 1.Fig. 2, Fig. 3 It is the exploded perspective view of the pump installation 1 of embodiment 1, Fig. 2 is the exploded perspective view from the side Z1 of axis direction Z, Fig. 3 It is the exploded perspective view from the other side Z2 of axis direction Z.In addition, Fig. 4 is the pump installation 1 and drain plug of embodiment 1 100 cross-sectional view is the cross-sectional view of the position A-A of Fig. 1.In the present specification, these three directions XYZ are mutually orthogonal sides To.Z-direction is the axis direction of aftermentioned motor 3 and impeller 2.In addition, the side of axis direction Z is set as Z1, it will be another Side is set as Z2, and the side of X-direction is set as X1, the other side is set as X2, and the side of Y-direction is set as Y1, the other side is set as Y2。

The pump installation 1 of embodiment 1 is known as the pump of the type of water proof type pump (shielding electrodynamic pump), has 2 He of impeller The motor 3 for rotating impeller 2.Motor 3 has rotor 5, stator 6 and the circuit substrate 4 for controlling motor 3.Electricity Motivation 3 is DC brushless motor.Impeller 2 and rotor 5 are configured in the inside for the shell being made of shell 7 and shell 8, shell 7 It is integrally formed with stator 6 and circuit substrate 4 and constitutes the enclosure body of a part of motor 3,8 covering shell 7 of shell The side Z1 of axis direction Z.

Shell 7 (enclosure body) and shell 8 are fixed to each other by screw 190 as fixation member and nut 191.Separately Outside, pump installation 1 has the metal plate 60 for abutting and fixing with shell 8 from the side Z1 of axis direction Z.Shell 8 and metal plate 60 It is fixed on shell 7 by common screw 190 and nut 191.

The suction inlet 20 of fluid, the outlet 30 of fluid, discharge outlet 40 are formed on shell 8.In shell 7 and shell 8 Between be formed with the pump chamber 9 that passes through towards outlet 30 of fluid sucked from suction inlet 20.In addition, connecing in shell 7 and shell 8 Close the seal members 10 (referring to Fig. 4) such as the o-ring that part is configured with for ensuring the airtightness of pump chamber 9.Shell 7 has will pump The mode that room 9 and stator 6 separate is configured at the partition wall member 11 between pump chamber 9 and stator 6 and covers the following table of partition wall member 11 The resin seal component 12 of the resin in face and side.Resin seal component 12 is by BMC (Bulk Molding Compound: group Shape moulding compound) it constitutes.

As shown in Figure 2 and Figure 3, shell 8, which has, is viewed as substantially rectangular enclosure body portion 80 from axis direction Z and is set to The mounting portion 89 at three positions in the corner at four positions in enclosure body portion 80.As shown in Figure 1, mounting portion 89 is from shell sheet The corner in body portion 80 is prominent to radial outside.Pump installation 1 is installed on branch via the fixation hole of the perforation mounting portion 89 of Z in the axial direction It holds on body.As shown in Figure 2, Figure 4 shows, enclosure body portion 80 has towards the end face 81 of the side Z1 of axis direction Z and towards radial direction The side 82 in outside.End face 81 be relative to pump chamber 9 bottom surface 90 on axis direction Z towards the face of opposite side, be that setting is inhaled The face of entrance 20.Side 82 has the side of the side Y1 of the Y-direction equipped with discharge outlet 40, Y-direction equipped with outlet 30 This four faces of the side of the side of other side Y2, the side X1 of X-direction and other side X2.

(suction inlet, outlet and discharge outlet)

In pump installation 1, the suction inlet 20 of fluid is formed in from the center of the end face 81 in enclosure body portion 80 to axis side To the front end of the suction passage forming portion 21 of the side Z1 tubular outstanding of Z.It is formed in the inside of suction passage forming portion 21 The suction passage 22 that Z extends in the axial direction.As shown in figure 4, the end of the other side Z2 of the axis direction Z of suction passage 22 exists The central opening of inner surface, that is, bottom surface 90 of the side Z1 of the axis direction Z of pump chamber 9.In addition, outlet 30 is in shell 8 from court It is open to the front end of the side of the other side Y2 of Y-direction discharge duct forming portion 31 outstanding towards the other side Y2 of Y-direction.? The inside of discharge duct forming portion 31 is formed with the discharge duct 32 extended along Y-direction (referring to Fig. 3, Fig. 6, Fig. 7).Discharge duct 32 are open in inner surface, that is, inner peripheral surface 91 of the radial outside of pump chamber 9, and the tangential direction along inner peripheral surface 91 extends (referring to Fig. 7). The liquid that pump installation 1 is sucked by 2 force feed of impeller from the center of pump chamber 9, and by it from discharge duct 32 to the tangent line side of pump chamber 9 To submitting.

Side from side Y1 towards Y-direction outstanding drainage hole forming portion 41 of the discharge outlet 40 in enclosure body portion 80 Front end towards Y-direction side Y1 be open.The drainage hole 42 extended along Y-direction is formed in the inside of drainage hole forming portion 41 (referring to Fig. 7).Drainage hole 42 is radially extended along pump chamber 9.As be described hereinafter, drainage hole 42 with the bottom surface of pump chamber 9 90 opening in Side opening portion 43 connects, and is connected to via inside opening portion 43 with pump chamber 9.In this mode, discharge outlet 40 towards with outlet 30 Opposite side.That is, other side Y2 of the outlet 30 towards Y-direction, side Y1 of the discharge outlet 40 towards Y-direction.As shown in figure 4, pump The setting posture of device 1 is to make the side Y1 of Y-direction towards (the paper lower section of Fig. 4) below vertical direction, and make Y-direction Posture of the other side Y2 towards (the paper top of Fig. 4) above vertical direction.Under this set posture, drainage hole 42 is from pump chamber Towards extension below vertical direction, 40 vertical of discharge outlet is downwardly open for 9 lower end.

As shown in Figure 1, being dismantledly equipped with drain plug 100 in discharge outlet 40.When using pump installation 1, discharge outlet 40 are occluded by drain plug 100.When not using pump installation 1, in the liquid being discharged in pump chamber 9, draining is removed from discharge outlet 40 Plug 100 is open (referring to Fig. 4) by discharge outlet 40.The liquid of pump chamber 9 is discharged from drainage hole 42 as a result,.As shown in figure 4, drain plug 100 have the isothrausmatic seal member 102 of o-ring of axle portion 101 with the front end face for being held in axle portion 101.In drainage hole 42 Inner surface is equipped with the conical surface 44.Drain plug 100 is by seal member 102 in such a way that complete cycle and the contiguity of the conical surface 44 block drainage hole 42 It constitutes.

(motor)

As shown in figure 4, rotor 5 have driving magnet 14, cylindric sleeve 15 and keep driving magnet 14 and The holding member 16 of sleeve 15.Holding member 16 is formed as substantially cylindric with flange.Driving magnet 14 is fixed on holding The peripheral side of component 16, sleeve 15 are fixed on the inner circumferential side of holding member 16.Impeller 2, which is fixed on, is configured at driving magnet 14 The lip portions 16a of the holding member 16 of the side Z1 of axis direction Z.That is, impeller 2 is installed on rotor 5.Impeller 2 and rotor 5 are matched It is placed in the inside of pump chamber 9.

Rotor 5 is rotatably supported by fixing axle 17.Z extends fixing axle 17 in the axial direction.The axis side of fixing axle 17 It is held in shell 8 to the end of the side Z1 of Z, the end of the other side Z2 of the axis direction Z of fixing axle 17 is held in shell 7. Fixing axle 17 is inserted through the inner circumferential side of sleeve 15.In addition, being equipped with the side with the axis direction Z of sleeve 15 in fixing axle 17 The thrust bearing part 18 that the end face of Z1 abuts.In this mode, sleeve 15 works as the transverse bearing of rotor 5, sleeve 15 and thrust bearing part 18 work as the thrust bearing of rotor 5.

Fig. 5 is the perspective view of circuit substrate 4, stator 6 and partition wall member 11 from the other side Z2 of axis direction Z.Such as Shown in Fig. 4, Fig. 5, stator 6 has driving coil 23, stator core 24 and the insulator 25 as insulating element, as whole Body is shaped generally as cylindrical shape.As shown in figure 4, stator 6 is configured at the peripheral side of rotor 5 via partition wall member 11.That is, in rotor Partition wall member 11 is configured between 5 and stator 6.In addition, stator 6 is matched in such a way that the center line of stator 6 and axis direction Z are consistent It sets.

Stator core 24 is the stacked core that the thin magnetic sheet being made of magnetic material is laminated and is formed.The method is determined Sub- iron core 24 has periphery ring portion 24a (referring to Fig. 5) and equiangularly pitch is formed in six of the inner circumferential side of periphery ring portion 24a Salient pole portion 24b (referring to Fig. 4).Driving coil 23 is wound in the salient pole portion 24b of stator core 24 via insulator 25.Stator 6 The multiple terminal pins 26 for having the end for winding and being electrically connected with driving coil 23.Terminal pins 26 are pressed into insulator 25, with Axis direction Z is configured in parallel.

(partition wall member)

Partition wall member 11 is formed as the substantially bottomed cylindrical with flange, has the cylindrical portion that Z extends in the axial direction 11a, it is formed in such a way that the end of the side Z1 of the axis direction Z from cylindrical portion 11a is to the extension of the radial outside of cylindrical portion 11a Flange part 11b and block cylindrical portion 11a axis direction Z other side Z2 opening bottom 11c.Cylindrical portion 11a with Covering driving is configured with the mode of the outer peripheral surface of magnet 14.

As shown in figure 4, it is solid to be formed with holding in such a way that the side Z1 to axis direction Z is outstanding in the center of bottom 11c The axis maintaining part 11h of the end of the other side Z2 of the axis direction Z of dead axle 17.In addition, in the center of bottom 11c, with to axis The other side Z2 mode outstanding of direction Z is formed with the fixation protrusion for being fixed on circuit substrate 4 on partition wall member 11 11j.In addition, as shown in figure 5, being formed in such a way that the other side Z2 to axis direction Z is outstanding for positioning in bottom 11c The positioning of circuit substrate 4 protrusion 11k.

As shown in figure 4, the inner circumferential side of partition wall member 11 and the side Z1 of axis direction Z become pump chamber 9, by partition wall member 11 Pump chamber 9 is formed with shell 8.In addition, impeller 2 and rotor 5 are configured at the inner circumferential side of partition wall member 11 and the side of axis direction Z Z1.Partition wall member 11 prevents the fluid in pump chamber 9 to the inflow at the configuration position of stator 6 and circuit substrate 4.

(circuit substrate)

Circuit substrate 4 is the rigid substrates such as glass epoxy substrate, is formed as tabular.Circuit substrate 4 is configured at than driving With coil 23, stator core 24 and insulator 25 by the position of the side Z1 of axis direction Z.In addition, circuit substrate 4 is by solid Surely in the state of being positioned radially with protrusion 11j and positioning protrusion 11k, by being screwed into the fixed screw for using protrusion 11j 13 are fixed on partition wall member 11 (referring to Fig. 4, Fig. 5).That is, circuit substrate 4 is configured at the outside of pump chamber 9.Before terminal pins 26 End part soldering is fixed on circuit substrate 4.In addition, being equipped with various electronic components (not shown) on circuit substrate 4.

(resin seal component)

Resin seal component 12 is by resinous woods such as 11 injecting BMCs of partition wall member for being fixed with stator 6 and circuit substrate 4 Expect and is formed.Specifically, the partition wall member 11 for being fixed with stator 6 and circuit substrate 4 is configured in mold, into the mold Injection resin material simultaneously makes its solidification, and resin seal component 12 is consequently formed.

Resin seal component 12 is in order to which circuit substrate 4 and driving coil 23 etc. is completely covered to protect circuit substrate 4 And driving is not fluid affected with coil 23 etc. and is arranged.Resin seal component 12 is integrally formed substantially have round-ended cylinder Circuit substrate 4, stator 6, cylindrical portion 11a and bottom 11c is completely covered in shape.In addition, resin seal component 12 covers flange part The lower surface of 11b.Connector 19 is installed in the peripheral end of circuit substrate 4.The connection with circuit substrate 4 on connector 19 Portion is sealed by resin component 12 and is completely covered.The exterior portion of connector 19 radially is not sealed by resin the covering of component 12, But expose in the side of the side X1 of the X-direction of resin seal component 12, the connector portion of external connection is constituted (referring to figure 1)。

(metal plate)

Metal plate 60 have from axis direction Z be viewed as generally square upper surface opposed portion 61 and from upper surface it is opposed The side opposed portion 62 that four sides in portion 61 protrude to outer peripheral side and extend deviously to the other side Z2 of axis direction Z.Metal Plate 60, which is assembled into, makes suction passage forming portion 21 be entrenched in the round hole 64 set on the center of upper surface opposed portion 61, upper surface pair It sets portion 61 to abut from the side Z1 of axis direction Z and the end face 81 in enclosure body portion 80, side opposed portion 62 is configured in shell The outside of the side 82 of body part 80.By abutting upper surface opposed portion 61 with end face 81, it is able to suppress enclosure body portion 80 Deformation.

As shown in Fig. 2, being formed in the end face 81 of the side Z1 of the axis direction Z in enclosure body portion 80 with suction passage shape At the multiple ribs 86 extended radially centered on portion 21.Outer peripheral portion in end face 81 is equipped with and the mutually level rectangle of rib 86 Frame portion 811, the peripheral end of rib 86 is connected with frame portion 811.The upper surface opposed portion 61 and frame portion 811 and rib 86 of metal plate 60 Front end face abut.

The opposed portion 61 in upper surface is equipped with metal plate fixation hole 63 in the corner at four positions.The opposed portion 61 in upper surface Each side, the range for forming side opposed portion 62 becomes range in addition to the both ends on each side, and side opposed portion 62 is located at The range of center side is leaned in position than being equipped with metal plate fixation hole 63.Consolidate that is, side opposed portion 62 is located at equipped with metal plate Determine the different angle position in the angle position in hole 63.By the way that side opposed portion 62 and metal plate fixation hole 63 are set to different angles Spend position, can reduce when make side 62 curved Bending Processing of opposed portion metal plate fixation hole 63 deform and cannot be by spiral shell Silk 190 is inserted into a possibility that metal plate fixation hole 63.In addition, being able to suppress the flatness of upper surface opposed portion 61 reduces.Therefore, It is able to suppress and generates gap between upper surface opposed portion 61 and shell 8.

As shown in Fig. 2, shell 7 is viewed as substantially rectangular from axis direction Z, fixed in the corner at four positions equipped with screw Portion 192.Z in the axial direction, which is formed with, in screw fixed part 192 penetrates through the corner of resin seal component 12 and the angle of flange part 11b The through hole 193 in portion.Screw 190 is inserted into the metal plate fixation hole in the corner set on four positions of upper surface opposed portion 61 63 and Z penetrates through the fixation hole 88 in the corner at four positions in enclosure body portion 80 in the axial direction, through hole 193 is passed through from spiral shell Silk fixed part 192 is prominent to the other side Z2 of axis direction Z.Then, it by being screwed into nut 191 in the front end of screw 190, constitutes The shell of pump installation 1, meanwhile, shell 8 is reinforced by metal plate 60.

(structure of the drainage hole relative to the connecting portion of pump chamber)

As shown in Fig. 2, the shape of the part of the side Z1 of the axis direction Z in enclosure body portion 80 is generally square.Shell The side 82 of body body part 80 have towards Y-direction side Y and other side Y2 and X-direction side X1 and other side X2 this The face of four direction, the center portion in each face are respectively formed with the extension 821 stretched out to outer peripheral side.Enclosure body portion 80 is logical It crosses the part in the other side Z2 of axis direction Z and forms extension 821, the shape shape of the part of the other side Z2 of axis direction Z (referring to Fig. 3) in a substantially circular.Enclosure body portion 80 is formed at the position of the sidewall sections for the peripheral side for constituting encirclement pump chamber 9 Extension 821, the sidewall sections for surrounding the peripheral side of pump chamber 9 are extended the reinforcement of portion 821.In addition, being formed in enclosure body portion 80 The extension 821 of side in the direction Y1 connect with from the side to radially projecting drainage hole forming portion 41, pass through extension 821 pairs of drainage hole forming portions 41 are reinforced.

As shown in figure 3, being formed in the inside in enclosure body portion 80 in the other side of the axis direction Z in enclosure body portion 80 The circular recess 83 of the face upper opening of Z2.What the peripheral side formation of circular recess 83 was abutted with the flange part 11b of partition wall member 11 Annular end face 84.The inner circumferential side for being formed in extension 821 is formed in the opposite side of axis direction Z relative to annular end face 84 Recess portion, that is, weight loss department 822 (referring to Fig. 2).Weight loss department 822 is set by the back side in annular end face 84, can be improved annular end face Therefore 84 flatness is able to suppress and forms gap between annular end face 84 and flange part 11b.In addition, by ensuring to stretch out The height of the axis direction Z in portion 821 is able to suppress the position that seal member 10 is configured between flange part 11b, shell sheet The peripheral end in body portion 80 floats from flange part 11b and cannot ensure airtightness.

As shown in Figure 3, Figure 4, circular recess 83 is equipped with circular step portion 831 in outer peripheral portion, in circular step portion 831 Inside forms the oriented inner recess 832 being recessed than circular step portion 831 by the side Z1 of axis direction Z.Such as Fig. 2, Fig. 4 institute Show, constitute shell 7 partition wall member 11 on be formed with it is chimeric with the inside of circular recess 83 in enclosure body portion 80 and and ring The annular convex 11d that shape stage portion 831 abuts on axis direction Z.The bottom surface of inner recess 832 is the axis direction Z of pump chamber 9 Side Z1 inner surface, that is, bottom surface 90.In addition, the inner peripheral surface of inner recess 832 is the inner peripheral surface 91 of pump chamber 9.

Fig. 6 is the perspective view of shell 8.32 part of it of discharge duct is by being formed in the circular step portion of circular recess 83 831 slot is constituted, and is open in the inner peripheral surface 91 of pump chamber 9 along the tangential direction of pump chamber 9.In addition, in the bottom surface of pump chamber 9 90 Centre, Z's suction passage 22 is open in the axial direction, the outer peripheral portion in bottom surface 90, the inside opening portion 43 connecting with drainage hole 42 Opening.Inside opening portion 43 is the recess portion for being formed in the bottom surface 90 of pump chamber 9.The inner surface in inside opening portion 43 has radially inner side Inner surface, that is, inclined surface 431, the inner surface 432 of radial outside, circumferential side and the inner surface 433 of the other side, 434, bottom Face 435 (planar portions).Inclined surface 431 is connect with the bottom surface 90 of pump chamber 9 with the obtuse-angulate angle of shape.In addition, in inside opening portion The interconnecting piece of the bottom surface 90 of 43 inner surface (inclined surface 431 and inner surface 433,434) and pump chamber 9 is equipped with the corner portion of radiussed 436.The bottom surface 435 in inside opening portion 43 is the planar portions parallel with the bottom surface 90 of pump chamber 9, with inclined surface 431 and inner surface 432,433,434 are connected.

The inner surface 432 of the radial outside in inside opening portion 43 is connected with the inner peripheral surface 91 of pump chamber 9.The inner peripheral surface of pump chamber 9 The groove portion that the part of the other side Z2 of the axis direction Z of the inner surface 432 in 91 formation inside opening portions 43 is slightly recessed to outer peripheral side 92, inner surface 432 is the face that the same face is formed with the bottom surface of groove portion 92.Radial outside of the drainage hole 42 in inside opening portion 43 Inner surface 432 is open.Inner surface, that is, inclined surface 431 of radially inner side is set to opposed with the inner surface 432 that drainage hole 42 is open Position.As shown in figs. 4 and 6, it is provided in a manner of downward (direction Y1 of Fig. 4, Fig. 6) in vertical direction by discharge outlet 40 In the state of pump installation 1, inclined surface 431 is located at the top (direction Y2 of Fig. 4, Fig. 6) of the vertical direction of drainage hole 42, towards pump The bottom surface 90 of room 9 tilts upward extension.Therefore, even if the bubble of pump chamber 9 comes inside opening portion 43, bubble is also readily along inclining Inclined-plane 431 flows, and therefore, is not easy to accumulate bubble in inside opening portion 43.

As shown in figure 4, drainage hole 42 is outside for the diameter of the recess portion (inside opening portion 43) in the bottom surface 90 for being formed in pump chamber 9 The flow path that the inner surface 432 of side is open and extends from inner surface 432 to radial outside.That is, drainage hole 42 is relative to pump chamber 9 The flow path that the position biased on axis direction Z radially extends.When drainage hole 42 is arranged in this position, drainage hole 42 is not The part of the shell 8 of the peripheral side of pump chamber 9 is surrounded in perforation, therefore, is able to suppress the side for surrounding the shell 8 of peripheral side of pump chamber 9 The strength reduction of wall part.

(configuration of rib)

Fig. 7 is the bottom view and top view of shell 8.Fig. 7 (a) is that shell 8 is faced upward from the other side Z2 of axis direction Z View, Fig. 7 (b) are the top views of the shell 8 from the side Z1 of axis direction Z.As shown in Fig. 7 (b), the axis side of shell 8 To Z side Z1 part be it is generally square, be formed with fixation hole 88 in the corner at four positions.In addition, in the axis of shell 8 The end face 81 of the side Z1 of line direction Z is formed with eight ribs 86 extended radially centered on suction passage forming portion 21. Eight ribs 86 are equiangularly spaced configuration.Four rib 86a in eight ribs 86 extend towards the corner for being formed with fixation hole 88, shape The identical angle position of Cheng Yuyu fixation hole 88.In addition, other four rib 86b in eight ribs 86 be formed in it is adjacent in the circumferential Fixation hole 88 centre angle position.One extended in four rib 86b to the side Y1 of Y-direction is formed in drainage hole 42 The position of extension is connect with drainage hole forming portion 41.Therefore, drainage hole forming portion 41 is reinforced by rib 86b.

As shown in Fig. 7 (a), in the bottom surface of pump chamber 9 90, used when four positions are formed in injection molding shell 8 The cast gate mark 87 of mold.Equiangularly interval configures cast gate mark 87 centered on suction inlet 20 and suction passage 22.In addition, The cast gate mark 87 at four positions is formed through four imaginary center line C of the centre of cast gate mark 87 adjacent in the circumferential Respectively with the consistent angle position in the angle position of fixation hole 88.It is such as above-mentioned, rib is formed in the angle position of fixation hole 88 86a.Therefore, four imaginary center line C are consistent with the angle position of rib 86a respectively.In addition, the cast gate mark 87 at four positions divides It is not formed in and a consistent angle position in four rib 86b.Across the centre of cast gate mark 87 adjacent in the circumferential Imaginary center line C be position in injection molding as the junction of two streams of resin, be the position of sealing wire.Therefore, four ribs 86a, which is located at, reinforces the position for forming fixation hole 88, and to the position that the position for forming sealing wire is reinforced.

(the main function and effect of embodiment 1)

As above, the pump installation 1 of embodiment 1 is because drainage hole 42 is open in bottom surface 90 without the inner peripheral surface 91 in pump chamber 9 Opening, so can be configured to drainage hole 42 does not penetrate through the sidewall sections for surrounding the shell 8 of peripheral side of pump chamber 9.Therefore, can Avoid the strength reduction that the sidewall sections of the peripheral side of pump chamber 9 are surrounded because drainage hole 42 are arranged.Therefore, it can be realized shell 8 Sidewall sections axis direction Z and the direction orthogonal with axis direction Z slimming, and be able to suppress the internal pressure of pump chamber 9 The deformation or damage of caused shell 8.In addition, drainage hole 42 is connect with the inside opening portion 43 for being set to bottom surface 90, inside opening Portion 43 has the inclined surface 431 connecting with bottom surface 90 with the obtuse-angulate angle of shape.Therefore, even if bubble reaches inside opening portion 43, bubble is also flowed readily along inclined surface 431, so drainage hole 42 can be opened up in bottom surface 90, and is able to suppress bubble It accumulates in drainage hole 42.Therefore, it is able to suppress the damage of the generation of cacophonia caused by bubble or the reduction of pump characteristics, impeller 2 It is bad.

In the embodiment 1, the inside opening portion 43 for connecting drainage hole 42 is the recess portion for being formed in bottom surface 90, and recess portion is (interior Side opening portion 43) radially inner side inner surface be inclined surface 431, open up drainage hole 42 in the inner surface 432 of radial outside.This Sample can biased on axis direction Z by the way that drainage hole 42 to be connect with the inner surface 432 of radial outside relative to pump chamber 9 Position radially extend drainage hole 42.Therefore, drainage hole 42 can be open radially, while avoids the side of shell 8 The strength reduction of wall part.In addition, being the inclination when pump installation 1 is arranged in mode downward in vertical direction with drainage hole 42 Face 431 is formed in direction in the vertical direction of drainage hole 42 and tiltedly goes up inclined face.Therefore, bubble accumulation is able to suppress in drainage hole 42。

In the embodiment 1, the planar portions of the inclined surface 431 in inside opening portion 43 and the bottom surface 90 for being parallel to pump chamber 9 are i.e. Bottom surface 435 is connected.In this way, if inside opening portion 43 is the shape for having the bottom surface 435 (planar portions) being connected with inclined surface 431 Shape can be avoided then in the mold for being used to form shell 8 and be used to form the shapes of the mould parts in inside opening portion 43 and be formed The shape of point.It is accordingly possible to ensure the intensity of mould parts.

In the embodiment 1, the interconnecting piece of the bottom surface 90 of the inner surface and pump chamber 9 in inside opening portion 43 is radiussed.This Sample in the mold for being used to form shell 8, easy to manufacture can be used for shape by the way that the interconnecting piece in face and face is set as radiussed At the mould parts in inside opening portion 43.In addition, the flow path that can be reduced when draining from pump chamber 9 via inside opening portion 43 damages It loses.

The shell 8 of embodiment 1 has the bottom surface 90 relative to pump chamber 9 towards the end face of opposite side 81, and end face 81 has The multiple ribs 86 extended radially centered on suction inlet 20.Therefore, the bottom for constituting pump chamber 9 can be improved using rib 86 Partial intensity.In addition, one in multiple ribs 86 is set to the position that drainage hole 42 extends, therefore, can be reinforced using rib 86 Form the position of drainage hole 42.Therefore, it is able to suppress the deformation or damage of shell 8 caused by the internal pressure of pump chamber 9.

The shell 8 of embodiment 1 has towards the side of radial outside 82, forms oriented radial outside in side 82 and stretches out Extension 821.In addition, drainage hole forming portion 41 is formed in the side in the direction Y1 in enclosure body portion 80, in drainage hole shape Extension 821 is linked at portion 41.Therefore, because drainage hole forming portion 41 can be reinforced using extension 821, so can keep away Exempt from the strength reduction of the sidewall sections of shell 8 due to drainage hole 42 are set.Therefore, it is able to suppress shell caused by the internal pressure of pump chamber 9 The deformation or damage of body 8.

In the embodiment 1, have a metal plate 60 for being fixed on shell 8, and the upper surface opposed portion 61 of metal plate 60 with The front end face of multiple ribs 86 abuts.Therefore, because the deformation of shell 8 can be inhibited by metal plate 60, so being able to suppress pump The deformation or damage of shell 8 caused by the internal pressure of room 9.In addition, metal plate 60 have the upper surface opposed portion 61 abutted with rib 86, And therefore the side opposed portion 62 of the side 82 of covering shell 8 can improve the strong of metal plate 60 using side opposed portion 62 Degree.

In the embodiment 1, it is equipped in the corner of metal plate 60 for across the screw 190 fixed relative to shell 8 Metal plate fixation hole 63.Moreover, the side opposed portion 62 of metal plate 60 is set to the angle position different from metal plate fixation hole 63 It sets.Therefore, when forming side opposed portion 62 by the Bending Processing of metal plate, a possibility that metal plate fixation hole 63 deforms It is small, therefore, it is impossible to by screw 190 pass through metal plate fixation hole 63 and can not fixed metal plate 60 a possibility that it is small.In addition, because A possibility that flatness of upper surface opposed portion 61 reduces is small, so generating gap between metal plate 60 and shell 8 and making A possibility that reinforcing effect reduces is small.

In the embodiment 1, the cast gate mark 87 of the mold used when injection molding shell 8 centered on suction inlet 20 It is circumferentially first-class to alternately form in four positions.Moreover, pass through the centre of adjacent cast gate mark 87 in the circumferential it is virtual in Heart line C is consistent with the angle position of any of multiple ribs 86 (being rib 86a in embodiment 1) respectively, and with for fixing Shell 7 (enclosure body) is consistent with the angle position of fixation hole 88 of shell 8.Across cast gate mark 87 adjacent in the circumferential Intermediate imaginary center line C is the angle position to form sealing wire.In this mode, because in the angle position for forming sealing wire It is formed with rib 86a, it is possible to reinforce being formed the position of sealing wire by rib 86a.Therefore, shell 8 is able to suppress from sealing wire It rises and starts to deform and damage.In turn, because being formed with rib 86a in the angle position of fixation hole 88, can be added using rib 86a The strong position for forming fixation hole 88.In this way, due to that can be ensured by force by the position of the rib 86a strength reduction for reinforcing shell 8 Degree, therefore the generation of deformation caused by internal pressure, damage can be inhibited.

In the embodiment 1, the cast gate mark 87 at four positions is respectively with one in multiple ribs 86 (in embodiment 1 It is consistent for the angle position of rib 86b).In this way, can equably configure multiple ribs by also forming rib 86 on cast gate mark 87 86 to improve the reinforcing effect of shell 8.

[embodiment 2]

Fig. 8 is the stereoscopic figure of the pump installation 1A of embodiment 2.In addition, Fig. 9 is the pump installation 1A of embodiment 2 Main view, Figure 10 are the cross-sectional views (cross-sectional view of the position B-B of Fig. 9) of the pump installation 1A of embodiment 2.Hereinafter, explanation and reality The different several points of mode 1 are applied, identical point marks symbol same as embodiment 1 and omits the description.The pump of embodiment 2 fills Set 1A have shell 7 (enclosure body) and covering shell 7 axis direction Z side Z1 shell 8A, but do not have to shell The metal plate 60 that 8A is reinforced.Shell 8A and shell 7 are fixed to each other by the screw 190 as fixation member.Such as Figure 10 institute Show, the fixation hole 88 of shell 8A is screw hole, and the front end of screw 190 is screwed into fixation hole 88 rather than is screwed into nut.

As shown in Figure 8, Figure 9, the suction inlet 20 of fluid, the outlet 30 of fluid and discharge outlet are formed on shell 8A 40.Front opening of the discharge outlet 40 in the side of the side Y1 of the Y-direction from shell 8A drainage hole forming portion 41 outstanding.Shell 8A has enclosure body portion 80 and is formed in the mounting portion 89 in the corner at three positions in enclosure body portion 80.In enclosure body portion The end face 81 of the side Z1 of 80 axis direction Z is formed with 86 He of multiple ribs extended radially centered on suction inlet 20 The multiple ribs 85 annularly extended centered on suction inlet 20.Cricoid rib 85 is connect with drainage hole forming portion 41.

The multiple ribs 86 and embodiment 1 radially extended are same, include four rib 86a and four rib 86b, four ribs 86a is set to the identical angle position imaginary center line C of the centre of the cast gate mark 87 adjacent in the circumferential with passing through, four ribs 86b is set to angle position identical with cast gate mark 87.Rib 86a set on angle position identical with imaginary center line C is set to Angle position identical with the fixation hole 88 for fixing shell 8A and shell 7.In addition, in embodiment 2, radial rib 86 interval is narrower than the interval of the radial rib 86 of embodiment 1, and the angle position between rib 86a, 86b is respectively provided with respectively One rib 86c.In this way, the interval of rib 86 is set to it is relatively narrow, and by the way that cricoid rib 85 is arranged, improve shell 8A's plus Potent fruit, so the generation of deformation caused by internal pressure, damage can also be inhibited even if not installing metal plate 60.In addition it is also possible to The rib of arc-shaped is set rather than cricoid rib 85 is set.That is, rib circumferentially can be arranged to improve reinforcing effect.

As shown in Figure 10, pump chamber 9 is formed between shell 8A and shell 7.In embodiment 2, in the bottom surface of pump chamber 9 90 are formed with inside opening portion 43, and drainage hole 42 is open in the inner surface of the radial outside in inside opening portion 43.Inside opening portion The inner surface of 43 radially inner side be by with 90 shape of bottom surface of pump chamber 9 it is obtuse-angulate in a manner of the inclined surface 431 that connects.

It is identical as embodiment 1 in this way, in the pump installation 1A of embodiment 2, drainage hole 42 bottom surface 90 be open without It is the opening of inner peripheral surface 91 in pump chamber 9, therefore, is configured to drainage hole 42 in the peripheral side of pump chamber 9 and is not penetrated the side of shell 8 Wall part.It can thus be avoided the strength reduction of the sidewall sections of shell 8A, so can inhibit shell caused by the internal pressure of pump chamber 9 The deformation or damage of body 8A.In addition, drainage hole 42 is connect with the inside opening portion 43 for being set to bottom surface 90, inside opening portion 43 has With the inclined surface 431 being connect with the bottom surface obtuse-angulate angle of 90 shape.Therefore, even if bubble reaches inside opening portion 43, bubble It is flowed readily along inclined surface 431, therefore, drainage hole 42 can be opened up in bottom surface 90, and be able to suppress bubble accumulation in row Water hole 42.Therefore, the generation of cacophonia caused by bubble or the reduction of pump characteristics, the damage of impeller 2 can be inhibited.

Claims (10)

1. a kind of pump installation has the shell for constituting pump chamber, the impeller for being configured at the pump chamber, the electricity for making the impeller rotation Motivation, which is characterized in that

It is provided on the housing from the suction inlet of pump chamber connection and outlet and in the side different with the outlet The drainage hole configured upwards,

The inner surface of the pump chamber has bottom surface opposed with the impeller in the axial direction,

The drainage hole is connect with the inside opening portion for being set to the bottom surface,

The inside opening portion has inclined surface, and the inclined surface is relative to the bottom surface with the obtuse-angulate angle connection of shape.

2. pump installation according to claim 1, which is characterized in that

The inside opening portion is formed at the recess portion of the bottom surface,

The inner surface of the radially inner side of the recess portion is the inclined surface, and the drainage hole is in the radial outside of the recess portion Surface opening.

3. pump installation according to claim 2, which is characterized in that

The inclined surface is connected with the planar portions for being parallel to the bottom surface.

4. pump installation according to claim 3, which is characterized in that

The inner surface in the inside opening portion and the interconnecting piece of the bottom surface are radiussed.

5. pump installation according to claim 1, which is characterized in that

The inclined surface is connected with the planar portions for being parallel to the bottom surface.

6. pump installation according to claim 1, which is characterized in that

The inner surface in the inside opening portion and the interconnecting piece of the bottom surface are radiussed.

7. pump installation described according to claim 1~any one of 6, which is characterized in that

The shell has relative to the bottom surface on the axis direction towards the end face of opposite side,

The end face has the multiple ribs extended radially centered on the suction inlet,

At least one of the multiple rib is set to the position that the drainage hole extends.

8. pump installation according to claim 7, which is characterized in that

The pump installation has the metal plate being fixed on the shell,

The metal plate is abutted with the front end face of the multiple rib.

9. pump installation according to claim 8, which is characterized in that

The shell has towards the side of radial outside and from side drainage hole forming portion outstanding,

The extension connecting with the drainage hole forming portion is formed in the side.

10. pump installation according to claim 1, which is characterized in that

The shell has towards the side of radial outside and from side drainage hole forming portion outstanding,

The extension connecting with the drainage hole forming portion is formed in the side.