CN115095516A

CN115095516A - Pump device and plunger pump

Info

Publication number: CN115095516A
Application number: CN202210789463.5A
Authority: CN
Inventors: 傅珂珂; 李进
Original assignee: Zhejiang Qianji Intelligent Technology Co Ltd
Current assignee: Zhejiang Qianji Intelligent Technology Co Ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-09-23
Also published as: WO2024008137A1

Abstract

The invention relates to a pump using device and a plunger pump. The pump body is internally provided with a volume cavity and a mounting cavity, and then when the assembly is carried out, the plunger is connected to the reciprocating part of the reciprocating assembly, the reciprocating part is in transmission fit with the power shaft, the plunger is penetrated and arranged in the volume cavity from one side of the mounting cavity, so that the reciprocating part and the power shaft are positioned in the mounting cavity, and the assembly can be realized. The power source drives the power shaft to drive the reciprocating piece to reciprocate along the axis direction of the power shaft so as to drive the plunger to reciprocate in the volume cavity, and the purposes that fluid can be sucked into the volume cavity from the first channel and is discharged from the second channel are achieved. Above-mentioned plunger pump is through all setting up reciprocating part and power shaft in the pump body, not only simplifies spare part to simplify the assembly step, be favorable to plunger pump's miniaturized design simultaneously.

Description

Pump device and plunger pump

Technical Field

The invention relates to the technical field of pump structures, in particular to a pump device and a plunger pump.

Background

A pump is a machine that delivers or pressurizes a fluid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, causing the liquid energy to increase. The pump is mainly used for conveying liquid such as water, oil, acid-base liquid, emulsion, suspension emulsion and liquid metal, and can also be used for conveying liquid, gas mixture and liquid containing suspended solid. However, the conventional pump has a complicated structure and a complicated assembly process, and is not conducive to miniaturization.

Disclosure of Invention

In view of the above, it is desirable to provide a pump device and a plunger pump which facilitate simplification of the assembly process and miniaturization.

A plunger pump comprises a reciprocating assembly and a pump assembly, wherein the reciprocating assembly comprises a power source, a power shaft and a reciprocating piece, and the reciprocating piece is in transmission fit with the power shaft so that the power shaft can drive the reciprocating piece to reciprocate along the axial direction of the power shaft; the pump assembly includes the pump body and plunger, be formed with the volume chamber in the pump body, just be formed with on the outer wall of the pump body with first passageway and the second passageway of volume chamber intercommunication, still be formed with in the pump body with the installation cavity of volume chamber intercommunication, the plunger connect in reciprocating member, the plunger wears to locate in the volume chamber, so that the power shaft reaches reciprocating member is located in the installation cavity, the power source is used for the drive the power shaft rotates, in order to pass through reciprocating member drives the plunger is in volume intracavity reciprocating motion, so that fluid can follow first passageway is inhaled in the volume chamber, and follow the second passageway is discharged.

In one embodiment, a guide structure is arranged in the mounting cavity, the reciprocating member is arranged in the radial direction of the power shaft, the reciprocating member is in guide fit with the guide structure, and the guide direction of the guide structure is consistent with the axial direction of the power shaft.

In one embodiment, a guide groove is formed in the outer wall of the reciprocating member, the guide structure is a guide rod, the length direction of the guide rod is the axial direction of the power shaft, and the guide rod penetrates through the guide groove and can slide in the guide groove; or

The guide structure for form in guide groove on the installation cavity inner wall, guide groove's length direction does the axis direction of power shaft, the outer wall of reciprocating member is formed with the direction arch, the direction arch is worn to locate in the guide groove, and can slide in the guide groove.

In one embodiment, a reciprocating guide rail is arranged on the power shaft, the reciprocating guide rail is a closed curve-shaped guide rail surrounding the axis of the power shaft, and peaks and troughs of the curve-shaped guide rail are arranged at intervals along the axis of the power shaft; the reciprocating piece comprises a moving body and a reciprocating body, the reciprocating body is sleeved on the power shaft, the moving body is located between the reciprocating body and the power shaft, the moving body is arranged on the reciprocating guide rail in a guiding mode and limited on the reciprocating body, the moving body can move on the reciprocating guide rail, and the plunger is connected to the reciprocating body.

In one embodiment, the reciprocating guide rail is a reciprocating groove which is a closed curve-shaped groove surrounding the axis of the power shaft, and the moving body is arranged in the reciprocating groove in a penetrating way and can move in the reciprocating groove; the inner wall of the reciprocating groove is provided with an oil guide groove, the moving body is a sphere, and the moving body can roll in the reciprocating groove.

In one embodiment, the oil guide groove is a closed curve-shaped groove surrounding the axis of the power shaft.

In one embodiment, the reciprocating member further includes a fitting sleeve, the fitting sleeve is sleeved on the moving body and is mounted on the reciprocating body, a plurality of rolling balls are arranged between the moving body and the inner wall of the fitting sleeve, and the moving body can roll relative to the fitting sleeve.

In one embodiment, the power shaft is further provided with a balance guide rail which is arranged opposite to the reciprocating guide rail along the axis of the power shaft at intervals, the balance guide rail is a closed curve-shaped guide rail surrounding the axis of the power shaft, and the wave crests and the wave troughs of the balance guide rail are arranged along the axis of the power shaft at intervals; the wave crest of the balance guide rail is opposite to the wave trough of the reciprocating guide rail along the axis direction, and the wave trough of the balance guide rail is opposite to the wave crest of the reciprocating guide rail along the axis direction; the balance guide rail is provided with a balance body, the balance body and the moving body are arranged oppositely along the axis of the power shaft, and when the power shaft rotates, the balance body and the moving body move oppositely or back to back.

In one embodiment, the pump body comprises a pump body and a rear cover, a volume cavity, the first channel and the second channel are formed at one end of the pump body, the mounting cavity is formed at the other end of the pump body, the rear cover is arranged at the other end of the pump body, a rotating hole is formed in the rear cover, a connecting rod is connected to one end of the power shaft, the connecting rod penetrates through the rotating hole and is connected with the power source, and a rolling bearing is arranged between the connecting rod and the inner wall of the rotating hole; and a plane bearing is arranged between the inner wall of the rear cover facing the mounting cavity and the power shaft.

In one embodiment, a guide sleeve and a sealing sleeve are arranged on the inner wall of the volume cavity, the sealing sleeve is positioned on one side of the guide sleeve, which faces away from the reciprocating member, the front end of the plunger, which faces away from the reciprocating member, penetrates through the guide sleeve and the sealing sleeve, and the front end of the plunger cannot penetrate through the sealing sleeve in the reciprocating movement stroke.

A pumping apparatus comprising a plunger pump as described above.

Above-mentioned with pump equipment and plunger pump, because be formed with volume chamber and installation cavity in the pump body, and then when the assembly, connect the plunger on reciprocating element of reciprocal subassembly, reciprocating element with the power shaft transmission cooperation wears to locate the volume intracavity with the plunger by one side of installation cavity to make reciprocating element and power shaft be located the installation cavity, can realize the assembly. The power source drives the power shaft to drive the reciprocating piece to reciprocate along the axis direction of the power shaft so as to drive the plunger to reciprocate in the volume cavity, and the purposes that fluid can be sucked into the volume cavity from the first channel and is discharged from the second channel are achieved. Above-mentioned plunger pump is through all setting up reciprocating part and power shaft in the pump body, not only simplifies spare part to simplify the assembly steps, be favorable to plunger pump's miniaturized design simultaneously.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Furthermore, the drawings are not to scale of 1:1, and the relative dimensions of the various elements in the drawings are drawn only by way of example and not necessarily to true scale. In the drawings:

FIG. 1 is a schematic diagram of a plunger pump in one embodiment;

FIG. 2 is a cross-sectional view of the plunger pump shown in FIG. 1;

FIG. 3 is a partially exploded view of the plunger pump shown in FIG. 2;

FIG. 4 is a partial cross-sectional view of the pump body of FIG. 3;

FIG. 5 is an exploded view of the rear cover and mounting cover of FIG. 3;

FIG. 6 is an exploded view of the plunger pump of FIG. 2 without the pump body and the end cap;

fig. 7 is a cross-sectional view of the mating sleeve of fig. 6.

Description of the reference numerals:

10. a plunger pump; 100. a reciprocating assembly; 110. a power source; 120. a power shaft; 122. a connecting rod; 124. a reciprocating groove; 126. an oil guide groove; 130. a reciprocating member; 131. a guide groove; 132. a moving body; 133. a reciprocating body; 134. a fitting sleeve; 135. a ball bearing; 136. a reciprocating hole; 137. mounting holes; 138. mounting a plate; 140. a reduction gear set; 200. a pump assembly; 210. a pump body; 211. a volume chamber; 212. a first channel; 213. a second channel; 214. a mounting cavity; 215. a guide sleeve; 216. sealing sleeves; 217. a limiting sleeve; 218. a first joint; 219. a second joint; 220. a plunger; 230. a pump body; 240. an end cap; 241. a first connecting groove; 242. a second connecting groove; 250. a rear cover; 252. rotating the hole; 260. a rolling bearing; 270. a plane bearing; 280. installing a cover; 290. a guide rod.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.

Referring to fig. 1 and 2, the plunger pump 10 according to an embodiment of the present invention at least achieves the object of improving the assembling efficiency and facilitating the miniaturization design. Specifically, the plunger pump 10 includes a reciprocating assembly 100 and a pump assembly 200, the reciprocating assembly 100 includes a power source 110, a power shaft 120 and a reciprocating member 130, and the reciprocating member 130 is in transmission fit with the power shaft 120, so that the power shaft 120 can drive the reciprocating member 130 to reciprocate along the axial direction of the power shaft 120; the pump assembly 200 comprises a pump body 210 and a plunger 220, wherein a volume cavity 211 is formed in the pump body 210, a first channel 212 and a second channel 213 which are communicated with the volume cavity 211 are formed on the outer wall of the pump body 210, an installation cavity 214 communicated with the volume cavity 211 is further formed in the pump body 210, the plunger 220 is connected to the reciprocating member 130, the plunger 220 is arranged in the volume cavity 211 in a penetrating manner, so that the power shaft 120 and the reciprocating member 130 are located in the installation cavity 214, the power source 110 is used for driving the power shaft 120 to rotate, so that the plunger 220 is driven by the reciprocating member 130 to reciprocate in the volume cavity 211, and fluid can be sucked into the volume cavity 211 from the first channel 212 and discharged from the second channel 213.

Because the volume cavity 211 and the mounting cavity 214 are formed in the pump body 210, when the reciprocating member 130 is assembled, the plunger 220 is connected to the reciprocating member 130, the reciprocating member 130 is in transmission fit with the power shaft 120, and the plunger 220 penetrates through the volume cavity 211 from one side of the mounting cavity 214, so that the reciprocating member 130 and the power shaft 120 are located in the mounting cavity 214, and the assembly can be realized. The power source 110 drives the power shaft 120 to drive the reciprocating member 130 to reciprocate along the axial direction of the power shaft 120, so as to drive the plunger 220 to reciprocate in the volume cavity 211, and the purposes that fluid can be sucked into the volume cavity 211 from the first channel 212 and discharged from the second channel 213 are achieved. In the plunger pump 10, both the reciprocating member 130 and the power shaft 120 are disposed in the pump body 210, which not only simplifies the components and the assembly steps, but also facilitates the miniaturization design of the plunger pump 10.

In an embodiment, a check valve is disposed in each of the first channel 212 and the second channel 213 to ensure one-way water inlet and outlet of the first channel 212 and the second channel 213, and to ensure stable fluid circulation.

In one embodiment, the inner wall of the volume chamber 211 is provided with a guide sleeve 215, and the plunger 220 is disposed through the guide sleeve 215 and capable of reciprocating in the guide sleeve 215. The guide sleeve 215 can prevent the plunger 220 from directly rubbing against the inner wall of the volume cavity 211, so as to ensure the service life of the pump body 210.

Specifically, a sealing sleeve 216 is further disposed on the inner wall of the volume chamber 211, the sealing sleeve 216 is located on a side of the guide sleeve 215 facing away from the reciprocating member 130, a front end of the plunger 220 facing away from the reciprocating member 130 passes through the guide sleeve 215 and can further pass through the sealing sleeve 216, and the front end of the plunger 220 cannot pass through the sealing sleeve 216 during a stroke of reciprocating movement. The sealing sleeve 216 can ensure that the fluid does not pass through the space between the plunger 220 and the inner wall of the volume chamber 211 during the process of pumping the fluid, thereby ensuring the tightness of the fluid during the process of pumping the fluid.

In another embodiment, a sealing ring is also disposed between the guide sleeve 215 and the plunger 220. The sealing performance is further ensured by utilizing the sealing ring.

In another embodiment, a limit sleeve 217 is further formed on a side of the sealing sleeve 216 opposite to the guide sleeve 215, the limit sleeve 217 is fixed on the inner wall of the volume cavity 211, and the limit sleeve 217 is used for limiting the position of the sealing sleeve 216 and preventing the sealing sleeve 216 from reciprocating along with the plunger 220 to affect the sealing performance. In other embodiments, the stop collar 217 may also be a stop protrusion formed on the inner wall of the volume 211.

In one embodiment, the plunger 220 comprises a connecting rod and a piston body, the piston body is connected to the reciprocating member 130 through the connecting rod, the piston body is located in the volume cavity 211 and can reciprocate in the volume cavity 211, and the piston body divides the volume cavity 211 into two compression spaces; the number of the first passages 212 and the number of the second passages 213 are two, the two first passages 212 are respectively communicated with the two compression spaces, and the two second passages 213 are respectively communicated with the two compression spaces.

In the process that the connecting rod drives the piston body to reciprocate, the sizes of two compression spaces can be changed circularly, for example, the piston body moves towards one compression space to be compressed, and the fluid in the compression space can be pumped out through a second channel 213 communicated with the compression space; while the other compression space increases in volume so that fluid is pumped into the compression space through a first passage 212 communicating with the compression space, the piston body is further moved to compress the compression space so that fluid is pumped out through a second passage 213 communicating with the compression space, and so on, thus achieving the effect of a double-acting pump.

In another embodiment, the plunger 220 is inserted into the volume cavity 211, and only one compression space is formed on the side of the plunger 220 opposite to the reciprocating member 130, and the first channel 212 and the second channel 213 are communicated with the compression space, so as to realize the effect of a single-action pump.

Referring to fig. 2 to 4, in an embodiment, the pump body 210 includes a pump body 230 and an end cap 240, a volume cavity 211, a first channel 212 and a second channel 213 are formed at one end of the pump body 210, a mounting cavity 214 is formed at the other end of the pump body 210, the end cap 240 is covered on one end of the pump body 210, a first connecting groove 241 and a second connecting groove 242 are formed at one side of the end cap 240 facing the pump body 230, the first channel 212 is communicated with the volume cavity 211 through the first connecting groove 241, and the second channel 213 is communicated with the volume cavity 211 through the second connecting groove 242. The pump body 230 and the end cap 240 are provided to facilitate communication between the first and

second passages

212 and 213 and the volume chamber 211.

Specifically, the first channel 212 and the second channel 213 are located on opposite sides of the volume cavity 211, respectively. Further, the first joint 218 is disposed at the first passage 212, the second joint 219 is disposed at the second passage 213, and the first joint 218 and the second joint 219 are respectively located at two opposite sides of the pump body 210, so that only one dimension of the plunger pump 10 is increased, which facilitates installation of the plunger pump 10 in use. In other embodiments, the first joint 218 and the second joint 219 can be disposed at other positions of the pump body 210 according to the use condition.

In another embodiment, a volume cavity 211 is formed at one end of the pump body 230, a mounting cavity 214 is formed at the other end of the pump body 230, the end cover 240 covers one end of the pump body 230, and a connecting groove is formed at a side of the end cover 240 facing the pump body 230, wherein one of the first channel 212 and the second channel 213 is formed on the end cover 240, and the other one is formed on the pump body 230, and the connecting groove is used for connecting the volume cavity 211 and the channel formed on the pump body 230. By forming the first channel 212 or the second channel 213 on the end cap 240, fluid flow out of or into the direction of movement of the plunger 220 is facilitated.

In other embodiments, the first channel 212 and the second channel 213 may both open on the end cap 240.

Referring to fig. 2 and 5, in an embodiment, the pump body 210 includes a pump body 230 and a rear cover 250, a volume cavity 211, a first channel 212 and a second channel 213 are formed at one end of the pump body 230, a mounting cavity 214 is formed at the other end of the pump body 230, the rear cover 250 is covered on the other end of the pump body 230, a rotation hole 252 is formed in the rear cover 250, one end of the power shaft 120 is connected to a connecting rod 122, and the connecting rod 122 is inserted into the rotation hole 252 and connected to the power source 110. The power shaft 120 and the reciprocating member 130 are conveniently packaged in the mounting cavity 214 through the rear cover 250. In this embodiment, one end of the power shaft 120 is provided with a connecting hole, and one end of the connecting rod 122 is inserted into the connecting hole and connected to the power shaft 120. Further, one end of the connecting rod 122 is fixed in the connecting hole by a bolt.

Specifically, a rolling bearing 260 is provided between the connecting rod 122 and the inner wall of the rotation hole 252. The friction between the connecting rod 122 and the inner wall of the rotating hole 252 is reduced through the rolling bearing 260, and the stability that the connecting rod 122 drives the power shaft 120 to rotate is ensured.

In one embodiment, a flat bearing 270 is disposed between the inner wall of the rear cover 250 facing the mounting cavity 214 and the power shaft 120. Specifically, the diameter of the power shaft 120 is larger than that of the connecting rod 122, so as to facilitate the abutting of the end face of the power shaft 120 on the rear cover 250 through the plane bearing 270. And the plane bearing 270 can effectively ensure the rotation of the power shaft 120 relative to the rear cover 250, and ensure the rotation stability. In the present embodiment, the flat bearing 270 is a thrust ball bearing or a thrust needle bearing. In other embodiments, the power shaft 120 may abut against the rear cover 250 through other structures capable of ensuring the rotational stability of the power shaft with respect to the rear cover 250.

In one embodiment, power source 110 is coupled to power shaft 120 through a reduction gear set 140. Specifically, a mounting cover 280 is further provided on a side of the rear cover 250 facing away from the pump body 230, and the mounting cover 280 is coupled to the rear cover 250 such that the reduction gear set 140 is located between the rear cover 250 and the mounting cover 280. By providing the reduction gear set 140 in the space between the rear cover 250 and the mounting cover 280, the operation of the reduction gear set 140 can be effectively protected.

In the present embodiment, the power source 110 is an electric motor or a motor. In other embodiments, the power source 110 may be other power components capable of driving the power shaft 120 to rotate.

Referring to fig. 3 and 6, in an embodiment, a guiding structure is disposed in the mounting cavity 214, the reciprocating member 130 is disposed in a radial direction of the power shaft 120, the reciprocating member 130 is in guiding fit with the guiding structure, and a guiding direction of the guiding structure is consistent with an axial direction of the power shaft 120. Through set up reciprocating member 130 in the radial direction of power axle 120, through the cooperation of leading between guide structure and the pump body 210 in the radial direction, further avoid increasing the length size of installation cavity 214, and the guide structure occupies lessly to the size of power axle 120 radial direction one side, is favorable to the miniaturization.

Specifically, the reciprocating member 130 is sleeved on the power shaft 120, and the guiding structure is in guiding fit with a side of the reciprocating member 130 opposite to the power shaft 120.

In this embodiment, the outer wall of the reciprocating member 130 is formed with a guide groove 131, the guide structure is a guide rod 290, the length direction of the guide rod 290 is the axial direction of the power shaft 120, and the guide rod 290 is inserted into the guide groove 131 and can slide in the guide groove 131. By the cooperation between the guide groove 131 and the guide rod 290, the guide rod 290 is partially embedded in the reciprocating member 130 by the guide groove 131, thereby further preventing the pump body 210 from being increased in size.

Specifically, the guide groove 131 is a semi-cylindrical groove. The guide bar 290 is a cylindrical bar.

In another embodiment, the guiding rod 290 is integrally formed on the inner wall of the mounting cavity 214, and the guiding rod 290 is a semi-cylindrical guiding rail formed on the inner wall of the mounting cavity 214, and the semi-cylindrical guiding rail is inserted into the guiding groove 131.

In another embodiment, the guiding structure is a guiding groove formed on the inner wall of the mounting cavity 214, the length direction of the guiding groove is the axial direction of the power shaft 120, and a guiding protrusion is formed on the outer wall of the reciprocating member 130, and the guiding protrusion is inserted into the guiding groove 131 and can slide in the guiding groove. The guide protrusion slides in the guide groove to guide the reciprocating member 130 to reciprocate.

In one embodiment, there are at least two guide structures, each spaced about the axis of the power shaft 120. In this embodiment, there are four guide structures, and the four guide structures are spaced around the axis of the power shaft 120. In other embodiments, the guide structure is disposed on the same side as the first connector 218 or the second connector 219 on the pump body 210.

Referring to fig. 2 and 6, in an embodiment, the reciprocating member 130 is sleeved on the power shaft 120, so as to ensure the stability of the power source 120 driving the reciprocating member 130 to move. Specifically, the power shaft 120 is provided with a reciprocating guide rail which is a closed curve-shaped guide rail surrounding the axis of the power shaft 120, and the wave crests and the wave troughs of the curve-shaped guide rail are arranged at intervals along the axis of the power shaft 120; the reciprocating member 130 includes a moving body 132 and a reciprocating body 133, the reciprocating body 133 is sleeved on the power shaft 120, the moving body 132 is located between the reciprocating body 133 and the power shaft 120, the moving body 132 is guided and disposed on the reciprocating guide rail and is limited on the reciprocating body 133, the moving body 132 can move on the reciprocating guide rail, and the plunger 220 is connected to the reciprocating body 133.

In this embodiment, the reciprocating guide rail is a reciprocating groove 124, the reciprocating groove 124 is a closed curve-shaped groove surrounding the axis of the power shaft 120, and the wave crests and the wave troughs of the curve-shaped groove are arranged at intervals along the axis of the power shaft 120; the moving body 132 is inserted into the reciprocating groove 124 and is limited on the reciprocating body 133, and the moving body 132 can move in the reciprocating groove 124.

When the power shaft 120 rotates, the moving body 132 can move in the reciprocating groove 124, so that the moving body 132 can move between a wave crest and a wave trough which are in a curve-shaped groove, the purpose that the moving body 132 reciprocates along the axial direction of the power shaft 120 is achieved, and the reciprocating body 133 drives the plunger 220 to reciprocate along the axial direction of the power shaft 120. The rotary motion of the power shaft 120 is converted into the linear motion of the reciprocating body 133 along the axis of the power shaft 120, so that the problem of deflection intersection of a crank structure or an eccentric driving structure cannot occur, and the working stability is better.

In another embodiment, the reciprocating guide rail is a guide protrusion, the guide protrusion is a closed strip-shaped curved protrusion surrounding the axis of the power shaft 120, and the wave crests and the wave troughs of the curved protrusion are arranged at intervals along the axis of the power shaft 120; the moving body 132 is provided on the guide protrusion and can move on the guide protrusion in a length direction.

In one embodiment, there are at least two reciprocating rails, each reciprocating rail is spaced along the axis of the power shaft 120, and each reciprocating rail is provided with at least one moving body 132. By providing at least two reciprocating guide rails, the stability of the moving body 132 driving the plunger 220 to move can be improved.

In another embodiment, the power shaft 120 is further provided with a balance guide rail which is arranged opposite to the reciprocating guide rail along the axis of the power shaft 120 at intervals, the balance guide rail is a closed curve-shaped guide rail surrounding the axis of the power shaft 120, and the wave crests and the wave troughs of the curve-shaped guide rail are arranged along the axis of the power shaft 120 at intervals; and the wave crest of the balance guide rail is opposite to the wave trough of the reciprocating guide rail along the axis direction, and the wave trough of the balance guide rail is opposite to the wave crest of the reciprocating guide rail along the axis direction. The balance guide rail is provided with a balance body, the balance body and the moving body 132 are arranged oppositely along the axis of the power shaft 120, and then when the power shaft 120 rotates, the balance body and the moving body 132 move oppositely or back to back. By providing the balance rail and the balance body, the bidirectional acceleration of the balance body and the moving body 132 can be cancelled during the moving process, and the vibration generated by the acceleration can be reduced.

Specifically, the balance guide rail and the reciprocating guide rail are consistent in structure, and the balance guide rail is symmetrically arranged along the circumference of the power shaft relative to the reciprocating guide rail. In the present embodiment, the balance body is structurally identical to the moving body 132.

In the present embodiment, the reciprocating body 133 is provided with a reciprocating hole 136, and the power shaft 120 is inserted into the reciprocating hole 136, so that the moving body 132 is located between the inner wall of the reciprocating body 133 and the power shaft 120. Specifically, the plunger 220 and the reciprocating body 133 are connected by a screw from one side of the reciprocating hole 136. Further, the bottom wall of the reciprocating hole 136 opposite to the power shaft 120 is provided with an assembly hole, the plunger 220 is positioned at the assembly hole, and the connecting screw penetrates through the assembly hole to connect the plunger 220 and the reciprocating body 133.

In this embodiment, the number of the moving bodies 132 is at least two, each moving body 132 is disposed at an interval around the axis of the power shaft 120, and the power shaft 120 can drive each moving body 132 to move in the same direction. Specifically, there are two moving bodies 132, and the two moving bodies 132 are disposed symmetrically about the axis of the power shaft 120. When the power shaft 120 rotates, the moving bodies 132 can be driven to move in the same direction, and each moving body 132 is limited on the reciprocating body 133. The stability of the transmission can be further improved by at least two moving bodies 132. In other embodiments, the number of mobile bodies 132 may be other numbers. The moving bodies 132 are uniformly arranged around the axis of the power shaft 120, and the stability of transmission and stress on the reciprocating body 133 is ensured.

In one embodiment, the moving body 132 is a sphere, and the moving body 132 can roll in the reciprocating groove 124. By providing the movable body 132 as a sphere, the frictional force of the movable body 132 during movement can be reduced.

In one embodiment, the inner wall of the reciprocating groove 124 is formed with an oil guiding groove 126. Lubricating oil can be provided in the oil guide groove 126, and when the moving body 132 moves in the reciprocating groove 124, the frictional resistance is further reduced by the lubricating oil, thereby ensuring smooth transmission.

Specifically, the oil guide groove 126 is a closed curvilinear groove that encircles the axis of the power shaft 120. Because the oil guide groove 126 is arranged on the inner wall of the reciprocating groove 124, the groove-shaped trend of the oil guide groove 126 is consistent with that of the reciprocating groove 124, and the moving body 132 is guaranteed to move to any position in the reciprocating groove 124 and have lubricating oil, so that the friction resistance is further guaranteed to be reduced. In other embodiments, there may be at least two oil guide grooves 126, and each oil guide groove 126 is spaced around the axis of the power shaft 120.

Referring to fig. 7, in an embodiment, the reciprocating member 130 further includes a fitting sleeve 134, and the fitting sleeve 134 is disposed on the moving body 132 and is mounted on the reciprocating body 133. Specifically, since the moving body 132 is a sphere, the moving body 132 is rollable with respect to the fitting sleeve 134. The fitting sleeve 134 prevents the moving body 132 from directly rolling and rubbing against the reciprocating body 133.

Further, a plurality of rollable balls 135 are provided between the moving body 132 and the inner wall of the engagement sleeve 134. In the present embodiment, the plurality of balls 135 are in contact with the side of the moving body 132 facing away from the power shaft 120. When the movable body 132 rolls with respect to the fitting sleeve 134, rolling friction is further reduced by the plurality of balls 135, so that the degree of smoothness of rolling of the movable body 132 is further improved, and stability of transmission is ensured.

In one embodiment, the inner wall of the reciprocating body 133 is provided with a mounting hole 137 communicated with the reciprocating hole 136, and the fitting sleeve 134 is mounted in the mounting hole 137. Specifically, the mounting hole 137 penetrates through the outer wall of the reciprocating body 133, the mounting plate 138 is disposed at one end of the fitting sleeve 134, and the fitting sleeve 134 is inserted into the mounting hole 137, so that the mounting plate 138 abuts against the outer wall of the reciprocating body 133 and is mounted on the reciprocating member 133. Specifically, the moving body 132 can pass through the mounting hole 137. The mounting plate 138 is attached to the outer wall of the reciprocating body 133 in contact therewith, whereby the movable body 132 and the fitting sleeve 134 are assembled to the reciprocating body 133.

In this embodiment, the mounting plate 138 is integrally formed with the mating sleeve 134.

In one embodiment, the position of the mating sleeve 134 may correspond to the position of the first connector 218 and the second connector 219 on the outer wall of the pump body 210. By using the dimension of the first connector 218 or the second connector 219 to set the fitting sleeve 134, the increase of the dimension of the pump body 210 in other directions due to the setting of the fitting sleeve 134 is avoided.

In one embodiment, the plunger pump 10 further includes a protective casing (not shown), and the reciprocating assembly 100 is disposed in the protective casing, and the protective casing protects the reciprocating assembly 100. Specifically, a lubricating oil cavity is formed in the protective casing, and the power shaft 120 and the reciprocating member 130 are both located in the lubricating oil cavity. Further, the guide bar 290 is also located within the lubrication cavity. Through adding lubricating oil at the lubricating oil chamber, can guarantee the stability of transmission between power shaft 120 and the reciprocating member 13, guarantee the stability through guide bar 290 direction, and because reciprocating groove 124 inner wall has seted up and has led oil groove 126, lubricating oil can also further enter into and lead in the oil groove 126, play lubricated effect to the removal of moving body 132, when improving the life-span of each part, also can be convenient for increase reciprocating speed.

In one embodiment, a pumping apparatus comprises the plunger pump 10 of any of the embodiments described above.

Specifically, the pump equipment further comprises a spray joint, a water inlet channel and a water outlet channel are formed in the spray joint, and the spray joint is installed on the pump body 210 so that the first channel 212 is communicated with the water inlet channel, and the second channel 213 is communicated with the water outlet channel. Through setting up the spray connection head, further be convenient for realize that the fluid enters into pump body 210 through water inlet channel to spout through water outlet channel, convenient to use.

In one embodiment, the pumping apparatus is a washer. Specifically, the plunger pump 10 in the present embodiment is a double-acting pump.

In one embodiment, the pumping apparatus is a washer. Specifically, the plunger pump in the present embodiment is a single-action pump.

In other embodiments, the pumping device may also be a nebulizer. For example, it may be a high-pressure sprayer, a pesticide sprayer, a high-pressure insecticide sprayer, or a high-pressure washer.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A plunger pump, characterized in that the plunger pump comprises:

the reciprocating assembly comprises a power source, a power shaft and a reciprocating piece, and the reciprocating piece is in transmission fit with the power shaft so that the power shaft can drive the reciprocating piece to reciprocate along the axis direction of the power shaft; and

pump assembly, pump assembly includes the pump body and plunger, be formed with the volume chamber in the pump body, just be formed with on the outer wall of the pump body with first passageway and the second passageway of volume chamber intercommunication, still be formed with in the pump body with the installation cavity of volume chamber intercommunication, the plunger connect in reciprocating member, the plunger wears to locate in the volume chamber, so that the power shaft reaches reciprocating member is located in the installation cavity, the power source is used for the drive the power shaft rotates, in order to pass through reciprocating member drives the plunger is in volume intracavity reciprocating motion, so that fluid can follow first passageway inhales in the volume chamber, and follow the second passageway is discharged.

2. The plunger pump according to claim 1, characterized in that a guide structure is arranged in the mounting cavity, the reciprocating member is arranged in a radial direction of the power shaft, the reciprocating member is in guide fit with the guide structure, and the guide direction of the guide structure is consistent with the axial direction of the power shaft.

3. The plunger pump according to claim 2, wherein a guide groove is formed on the outer wall of the reciprocating member, the guide structure is a guide rod, the length direction of the guide rod is the axial direction of the power shaft, and the guide rod is inserted into the guide groove and can slide in the guide groove; or

4. The plunger pump according to any one of claims 1-3, characterized in that a reciprocating guide rail is arranged on the power shaft, the reciprocating guide rail is a closed curve-shaped guide rail surrounding the axis of the power shaft, and the wave crests and the wave troughs of the curve-shaped guide rail are arranged at intervals along the axis of the power shaft; the reciprocating piece comprises a moving body and a reciprocating body, the reciprocating body is sleeved on the power shaft, the moving body is located between the reciprocating body and the power shaft, the moving body is arranged on the reciprocating guide rail in a guiding mode and limited on the reciprocating body, the moving body can move on the reciprocating guide rail, and the plunger is connected to the reciprocating body.

5. The plunger pump according to claim 4, characterized in that the reciprocating guide rail is a reciprocating groove which is a closed curve-shaped groove surrounding the axis of the power shaft, and the moving body is inserted into the reciprocating groove and can move in the reciprocating groove; the inner wall of the reciprocating groove is provided with an oil guide groove, the moving body is a sphere, and the moving body can roll in the reciprocating groove.

6. The plunger pump of claim 5, wherein said oil-guiding groove is a closed curvilinear groove encircling said power shaft axis.

7. The plunger pump according to claim 5, wherein the reciprocating member further comprises a fitting sleeve fitted over the moving body and mounted on the reciprocating body, a plurality of rollable balls are provided between the moving body and an inner wall of the fitting sleeve, and the moving body is rollable relative to the fitting sleeve.

8. The plunger pump of claim 4, wherein the power shaft is further provided with a balance guide rail which is arranged opposite to the reciprocating guide rail at intervals along the axis of the power shaft, the balance guide rail is a closed curve-shaped guide rail surrounding the axis of the power shaft, and the wave crests and the wave troughs of the balance guide rail are arranged at intervals along the axis of the power shaft; the wave crest of the balance guide rail is opposite to the wave trough of the reciprocating guide rail along the axis direction, and the wave trough of the balance guide rail is opposite to the wave crest of the reciprocating guide rail along the axis direction; the balance guide rail is provided with a balance body, the balance body and the moving body are arranged oppositely along the axis of the power shaft, and when the power shaft rotates, the balance body and the moving body move oppositely or back to back.

9. The plunger pump according to any one of claims 1 to 3, wherein the pump body comprises a pump body and a rear cover, a volume chamber, the first channel and the second channel are formed at one end of the pump body, the mounting chamber is formed at the other end of the pump body, the rear cover is arranged at the other end of the pump body, a rotating hole is formed in the rear cover, a connecting rod is connected to one end of the power shaft, the connecting rod is inserted into the rotating hole and connected to the power source, and a rolling bearing is arranged between the connecting rod and the inner wall of the rotating hole; and a plane bearing is arranged between the inner wall of the rear cover facing the mounting cavity and the power shaft.

10. The plunger pump according to any one of claims 1-3, characterized in that a guide sleeve and a sealing sleeve are arranged on the inner wall of the volume chamber, the sealing sleeve is positioned on the side of the guide sleeve facing away from the reciprocating member, the front end of the plunger facing away from the reciprocating member passes through the guide sleeve and the sealing sleeve, and the front end of the plunger cannot pass through the sealing sleeve during the stroke of reciprocating movement.

11. A pumping apparatus, characterized in that it comprises a plunger pump according to any one of claims 1-10.