KR101957611B1 - Fluid pump - Google Patents

Abstract

The present invention relates to a fluid pump capable of preventing a fluid from being reversely transferred while increasing transfer pressure of the fluid. The fluid pump includes: a housing having an inlet hole, an outlet hole, and a connection path allowing the inlet hole and the outlet hole to communicate with each other; a driving device disposed at one end of the housing to provide a rotational driving force; and at least two shafts having a partial area disposed inside the connection path, having a cylindrical shape passing through both ends of the housing, having a plurality of transfer blades having a screw thread shape perpendicular to an outer circumferential surface of the shaft and protruding in a longitudinal direction from one area of the outer circumferential surface disposed inside the connection path, and engaged with each other to rotate while being parallel to each other.

Description

Fluid pump {FLUID PUMP}

The present invention relates to a fluid pump.

Foam refers to a device that presses a gas or fluid to transfer a stationary gas or fluid to another area, or to control the feed rate or feed direction.

Such a pump can universally rotate the rotor or the fan to transfer the introduced gas or fluid in a desired direction or at a desired speed.

In the case of offshore oilfield, since the fluid to be transported is the oil having a viscosity higher than that of the general liquid and the direction to be transported is also required to transport the oil in the vertical direction from the sea floor to the sea direction, It is difficult to provide the necessary pressure.

The fluid pump applied to the maritime relic has to employ a high-pressure driving method in accordance with the viscosity and the transport direction of the fluid. In the prior art, the fluid pump is provided with an inner circumferential region of the flow path, There is disclosed a screw-type fluid pump in which at least one corresponding screw shaft is located, and a pressure is applied to the fluid introduced through the rotation of the screw shaft to discharge the fluid to the outside.

However, in the prior art, the thrust load applied to the screw shaft by the fluid to be conveyed or discharged has been increased in order to transfer the fluid having a higher viscosity, and the thrust load applied to the screw shaft adjacent to the screw shaft, There is a problem that the thrust load is applied to the NDE (Non-Drive-End) which is the other end than the drive end (DE) to which the driving device is connected.

In the prior art, a single screw shaft produced by a precision casting method is applied in order to minimize the deformation of the screw shaft caused by the thrust load. However, as the unit price of the screw shaft increases, the production and supply cost of the fluid pump itself also increases In addition, such screw shafts were subject to deformation and abrasion due to the continuous thrust load. If the deformation or abrasion occurred in a specific area, the entire screw shaft had to be replaced. The time required for maintenance also increases, which places a burden on the user.

Korean Patent Laid-Open No. 10-2000-0026109 (published on May 05, 2006) Korean Patent Laid-Open No. 10-2017-0102324 (Publication date 2017. 09.08)

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems,

It is an object of the present invention to provide a fluid pump that minimizes the supply cost of the fluid pump and the cost and maintenance time required for replacement and maintenance of the screw shaft.

It is another object of the present invention to prevent deformation of a non-drive-end (NDE) applied to a thrust load higher than a drive end (DE) of a screw shaft rotated by driving of a drive unit. And a fluid pump.

According to an aspect of the present invention, there is provided a fluid pump provided with a fluid inlet, a discharge hole through which fluid is discharged, and a connection hole communicating the inlet hole and the discharge hole in the other end direction, ; A driving device positioned at one end of the housing to provide a rotational driving force; And a part of the region is formed in a cylindrical shape which is located on the inner side of the connection path and penetrates both ends of the housing, and in the region of the outer circumferential surface located inside the connection path, a screw- And at least two shafts having protruded shapes and rotated in parallel by a rotational driving force provided from the driving device, wherein the connecting rods are formed in a shape of a vertical cross section of at least two shafts And at least two of the shafts are engaged and rotated by driving the driving device so that fluid introduced into the inlet hole of the housing is transferred along the connection passage and discharged to the discharge hole.

Here, the shaft includes a driving end portion positioned adjacent to the driving device and receiving a rotational force from the driving device, a non-driven end portion passing through the other end of the housing, and both ends connected to the driving end portion and the non- And each of the conveying parts formed with the conveying vanes is separated or provided with the same central rotational axis so as to be engageable with each other.

The feed vane of the shaft is formed symmetrically with respect to a virtual vertical line of the center point perpendicular to the central axis of rotation of the shaft, .

Also, the connection path of the housing is connected to the discharge hole in a region corresponding to the center point of the shaft from which the transfer blade is removed, both ends of the connection path are connected to the inlet hole, The fluid introduced through the inlet holes is transferred from both ends of the connection passage to the central region by the rotation of the at least two shafts and discharged through the discharge holes.

Meanwhile, the shaft includes: a first shaft connected to the driving device and rotating; And a second shaft which receives rotational force from the first shaft and rotates in engagement with the first shaft, wherein the length of the non-driven end portion of the second shaft is longer than the length of the non-driven end portion of the first shaft And an exposed region penetrating the other end of the housing and exposed to the outside of the housing.

The non-driven end cover may further include a lubricant layer on an inner space formed by being coupled to one surface of the other end of the housing, Is accommodated.

And an outer peripheral surface of the second shaft is coupled to the outer circumferential surface of the second shaft so as to surround a part of the outer circumferential surface of the exposed region of the second shaft, And a guide member for guiding convection of the lubricating oil accommodated in the guide member.

According to an embodiment of the present invention,

The fluid pump of the present invention is capable of increasing the transfer pressure of the fluid while preventing the reverse transfer of the fluid by discharging the introduced fluid to the outside by rotating at least two shafts in close contact with each other by crossing the transfer blades, .

In addition, since the shafts applied to the fluid pump of the present invention are separately formed by the drive end, the non-driven end, and the screw (the transfer blade forming part) and are provided by the axial coupling sharing the central axis, the manufacturing cost of the shaft is reduced The entire shaft is not required to be replaced when an abnormality occurs in each drive end, non-driven end, or screw, and the cost required for supply and maintenance can be reduced.

In addition, the guide member, which is applied to the fluid pump of the present invention, lubricates the lubricating oil accommodated in the inner space provided by the nonspherical end cover through the rotation of the second shaft to rotate the nonspherical (NDE) To the region of the other end of the housing adjacent to the bearing supporting the second shaft, and by diffusing the previously supplied lubricating oil to the other region, the lubricating and cooling action through the lubricating oil supply and diffusion causes the non- , Thereby improving the operation stability and durability of the fluid pump.

1 is a cross-sectional view of a fluid pump according to an embodiment of the present invention
Figure 2 illustrates first and second shafts in accordance with an embodiment of the present invention.
3 is a perspective view schematically showing a guide member according to an embodiment of the present invention.

These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. For purposes of this specification, like reference numerals in the drawings denote like elements unless otherwise indicated.

FIG. 1 is a cross-sectional view of a fluid pump according to one embodiment of the present invention, and FIG. 2 illustrates first and second shafts according to an embodiment of the present invention.

Referring to FIG. 1, a fluid pump 100 according to an embodiment of the present invention increases a pressure of a liquid sucked by sucking a fluid by operation, discharges the liquid, and includes a housing 110, a driving device 120, A guide member 140, a non-driven end cover 150,

The housing 110 is formed with an inlet hole 110a through which the fluid flows, a discharge hole 110b through which the fluid is discharged, and a connection passage 110c through which the inlet hole and the discharge hole communicate with each other in the other end direction .

Here, the connection path 110c is formed in a vertical cross-sectional shape of the first and second shafts 132 and 134 which are closely contacted by the first and second transfer vanes 132a and 134a to be described later, When the first and second shafts 132 and 134 are engaged and rotated by the driving of the first and second shafts 120 and 120, the fluid introduced into the inlet hole 110a is conveyed along the connection passage 110c and discharged to the outlet hole 110b .

The housing 110 is divided into a fluid accommodation space including a flow passage connected to the inlet hole 110a and a fluid accommodation space including a flow passage connected to the discharge hole 110b. The fluid introduced into the inflow hole 110a may not pass through the connection path 110c until the first shaft 132 and the second shaft 134, which will be described later, are engaged and rotated, have.

The at least two shafts 130 pass through both ends of the housing 110. The bearings B and the like that fasten and rotate the shaft 130 are fastened to both ends of the housing 110, The housing 110 is not formed as a single structure but is fixed by a bearing so that the replacement of the shaft 130 located inside the housing 110 A plurality of structures for opening or closing the inside by separation or coupling may be provided in a combined form.

The driving device 120 may be located at one end of the housing 110 to provide rotational driving force.

Here, the driving unit 120 may be provided in the form of a motor that provides a rotational driving force, and may include a cooling structure for cooling the heat generated by the driving.

The shaft 130 is formed in a cylindrical shape with a part of the inside of the connecting path 110c and penetrating both ends of the housing 110. The shaft 130 is formed in one part of the outer circumferential surface located inside the connecting path 110c, The feed vanes 132a and 134a in the form of a thread are protruded along the longitudinal direction and at least two or more of them can be rotated in parallel with each other by the rotational driving force provided from the driving device 120, .

Here, the shaft 130 includes a driving end portion D positioned adjacent to the driving device 120 and receiving rotational force from the driving device 120, a non-driven end portion N passing through the other end of the housing 110, Each of the conveying portions T having both ends connected to the driving end portion D and the non-driven end portion N and each of the conveying vanes may share the same center rotational axis and may be provided in a form capable of being separated or combined.

At this time, the connection portions of the driving end portion D and the transporting portion T or the transfer portion T and the non-driving end portion N have depressed or protruded structures, respectively. In each of the connecting portions, Holes are formed and fixed to each other by fixing means F, such as a reamer pin inserted into the holes of the respective connecting portions, to be combined into a single screw shaft shape.

The transfer blades 132a and 134a of the shaft 130 have a shape removed from a partial area of the center point of the transfer portion T and have a virtual shape of a center point perpendicular to the rotational axis direction of the shaft 130 And may be formed symmetrically with respect to a vertical line.

The thread forming directions of the conveying vanes 132a and 134a may also be formed symmetrically with respect to the virtual verticality of the center point.

The protruding threads of the feed vanes 132a and 134a have a predetermined thickness and are formed to have a thickness substantially equal to the width of the valley formed by the threads so that when the feed vanes 132a and 134a cross each other, The fluid can be prevented from being reversely transferred through the transfer vanes 132a and 134a and the transfer vanes 132a and 134a can minimize deformation and damage due to the transfer pressure of the fluid.

The shaft 130 includes a first shaft 132 coupled to the driving device 120 and a second shaft 132 coupled to the first shaft 132 to receive the rotational force from the first shaft 132, 134).

Here, the driving end portion D of the first shaft 132 and the driving end portion D of the second shaft 134 may be provided with teeth coupled to each other, The first shaft 132 and the second shaft 134 can be engaged and rotated while the rotational driving force provided from the second shaft 120 can be transmitted to the second shaft 134. [

The second conveying vane 134a of the second shaft 134 is formed in a shape that is parallel to the first conveying vane 132a of the first shaft 132 disposed inside the coupling passage 110c The second shaft 134 is in contact with the first shaft 132 in such a manner that the first transfer vane 132a and the second transfer vane 134a intersect with each other so that the first transfer vane 132a and the second transfer vane 134a, (134a) is disposed inside the connection passage (110c) and passes through both ends of the housing (110).

The length of the non-driven end portion N of the second shaft 134 is longer than the length of the non-driven end portion N of the first shaft 132 so as to penetrate the trough of the housing 110, An exposed region E that is exposed to the outside of the semiconductor device 100 may be provided.

Here, the connection path 110c of the housing 110 is formed in the region corresponding to the center point of the first and second shafts 132 and 134 in which the first and second transfer vanes 132a and 134a are removed, And both ends of the connecting path 110c are connected to the inlet hole 110a so that when the first and second shafts 132 and 134 are rotated by the driving device 120 to rotate, 110a are transferred from both ends of the connection passage 110a to the central region and discharged through the discharge hole 110b.

3 is a perspective view schematically showing a guide member according to an embodiment of the present invention.

Referring to FIG. 3, the guide member 140 is provided to surround a part of the outer circumferential surface of the exposed region E of the second shaft 134 and can guide the rotation of the shaft of the second shaft 134, The first and second wings 132a and 134a of the first and second shafts 132 and 134 located in the connecting path 110c by pressing the shaft 134 in the direction of the first shaft 132 Can be maintained.

Here, the guide member 140 may be provided in a form including a spacer 142 disposed on both sides of the oil ring 144 to fix the oil ring 144 and the oil ring 144 to the second shaft 134 have.

At this time, the spacer 142 may be fixed to the second shaft 134 by a fixing means such as a reamer pin or the like surrounding the outer circumferential surface of the second shaft 134, and the oil ring 144 may be fixed to the second shaft 134 The outer circumferential surface of the second shaft 144 can be fixed with the fixed spacer 142 fitted therebetween.

Accordingly, the oil ring 144 and the spacer 142 can be rotated together when the second shaft 134 is rotated.

The nonspherical end cover 150 may be coupled to a portion of the outer circumference of the other end of the housing 110 where the guide member 140 and the guide member 140 are located.

In this case, the non-driven end cover 150 may have an inner space coupled with the other end of the housing 110 to receive the lubricating oil, and the lubricating oil to be accommodated may have a relatively low viscosity, Type lubricating oil is preferably used.

The bottom end of the inner space of the non-driven end cover 150, which is formed by coupling to the housing 110, may be replaced with an inner lubricant replacement (not shown) And may be equal to or lower than the height at which the guide member 140 is positioned for convenience.

The spacer 144 is provided with a supply groove 142a so as to pass through the lubricant in the direction of the inner circumferential surface contacting the second shaft 134 for smooth convection of the lubricating oil accommodated in the inner space formed by the non- Can be formed.

Referring to FIG. 3, the oil ring 144 is ring-shaped so as to be insertable into the second shaft 134, and a wing for helping convection of the lubricant oil by the rotation of the shaft of the second shaft 134 in the outer circumferential direction As shown in Fig.

Here, the oil ring 144 may be provided in the shape of a propeller or a fan having a blade 144a in a predetermined angle unit, but the oil of the inner space may be lubricated by the rotation of the second shaft 134 The lubricant supplied to the non-driven end portion N of the second shaft 134 and the other end region of the housing 100 adjacent to the non-driven end portion N can be diffused to other regions .

At this time, in order to prevent the rotation of the second shaft 134, the wing 144a of the oil ring 144 is formed such that each wing 144a has a bending angle of 0 to 30 degrees or less, 144a may be formed to have a comb-like erase area perpendicular to the protruding direction to minimize friction with the lubricating oil during rotation.

1, the wing 144a of the oil ring 144 is bent toward the nose end cover 150 toward the end, and is positioned at the other end of the housing 110, 134) can be smoothly supplied to the outer periphery of the bearing (B).

The inner circumferential surface of the oil ring 144 in contact with the second shaft 134 is formed in such a manner that the mutual communication of the spacers 142 coupled to both sides at positions corresponding to the positions of the supply grooves 142a formed in the spacers 142 A part of the area may be deleted.

The drive end cover 160 is configured to surround a part of an outer region of one end of the housing 110 where the drive unit 120 is located and a first and a second shaft 132 and 134, .

At this time, the drive end cover 160 is fixed to the first and second shafts 132 and 134 so that the first shaft 132 transmits the rotational driving force supplied from the driving device 120 to the second shaft 134 Can be coupled to wrap the teeth coupled to the driving end portion (D).

The driving end cover 160 is coupled to one end of the housing 110 to prevent the teeth coupled to the driving end portion D of the first and second shafts 132 and 134 from being exposed to the outside, At the same time, in order to reduce frictional and frictional heat generated by the transmission of the rotational force of the teeth, it is possible to have an internal space in which lubricant is received as in the above-described non-driven end cover 150.

As described above, according to the fluid pump of the present invention, the at least two shafts closely engaged with each other by the crossing of the conveying vanes are rotated to engage with each other to discharge the introduced fluid to the outside, thereby preventing the reverse transfer of the fluid, There is an effect.

In addition, since the shaft of the present invention is provided by the axial coupling which is divided and manufactured by the drive end, the non-driven end and the screw (the feed wing forming part) and the central axis is shared, the manufacturing cost of the shaft is reduced, It is not necessary to replace the entire shaft when an abnormality occurs in the non-driven end or the screw, thereby reducing the cost required for supply and maintenance.

In addition, since the guide member of the present invention is constructed such that the lubricating oil accommodated in the inner space provided by the nonspherical end cover through the rotation of the second shaft is supported by the bearings for facilitating the rotation of the NDE and NDE of the second shaft, (NDE) of the second shaft due to the lubricating and cooling action through the supply and diffusion of the lubricating oil by supplying the previously supplied lubricating oil to the other region, It is possible to increase the operation stability and durability of the fluid pump by suppressing heat generation due to the load.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims, And equivalents may be resorted to as falling within the scope of the invention.

100: fluid pump
110: Housing
110a: inlet hole
110b: discharge hole
110c:
120: Driving device
130: shaft
132: first shaft
132a: first feed wing
134: Second shaft
134a: second feed wing
140: Guide member
142: Spacer
142a: supply groove
144: Oiling
114a: wing
150: Non-
160: Drive end cover
D: driving end portion
N: the acetabular portion
T: transport part
E: Exposed area
B: Bearing
F: Fixing means

Claims (7)

A housing having an inlet hole through which the fluid flows, a discharge hole through which the fluid is discharged, and a connecting passage for communicating the inlet hole and the outlet hole from one end toward the other end;
A driving device positioned at one end of the housing to provide a rotational driving force; And
Wherein a part of the region is formed in a cylindrical shape that is located on the inner side of the connection and penetrates both ends of the housing, and in the region of the outer circumferential surface located on the inner side of the connection path, a threaded feed vane perpendicular to the outer circumferential surface is projected along the longitudinal direction And at least two shafts which are parallel to each other and rotated by a rotational driving force provided from the driving device,
Wherein the at least two shafts are engaged and rotated by the drive of the drive unit so that the fluid introduced into the inlet hole of the housing Is conveyed along the connection path and is discharged to the discharge hole,
Wherein the shaft includes a driving end portion positioned adjacent to the driving device and receiving a rotational force from the driving device, a non-driven end portion passing through the other end of the housing, and both ends connected to the driving end portion and non- Wherein each of the winged transfer portions is provided in a detachable or engageable form sharing the same central rotational axis,
The shaft includes:
A first shaft connected to and rotated by the driving device; And
And a second shaft that receives rotational force from the first shaft and rotates in engagement with the first shaft,
The length of the non-driven end portion of the second shaft is longer than the length of the non-driven end portion of the first shaft and has an exposed region penetrating the other end of the housing and exposed to the outside of the housing,
Further comprising: a non-driven end cover coupled to surround the exposed region of the second shaft and a portion of the outer region of the other end of the housing,
Wherein the non-driven end cover receives lubricating oil in an inner space formed by being coupled to one surface of the other end of the housing,
And the non-driven end cover is located on an inner space provided on one surface of the other end of the housing and is accommodated in the inner space by the axial rotation of the second shaft, And a guide member for facilitating convection of the lubricating oil,
The guide member
A pair of spacers formed to surround a part of the outer circumferential surface of the exposed region of the second shaft and provided in a ring shape; And
A pair of spacers disposed between the pair of spacers to surround a part of the outer circumferential surface of the exposed region of the second shaft and protrude in a predetermined angle unit along the circumferential direction of the second shaft, An oil ring having a plurality of blades formed therein;
Wherein the spacer has a supply groove in which an inner circumferential surface area in contact with the second shaft is removed, and a region corresponding to the supply groove is partially removed from the oil ring, and rotation of the oil ring due to rotation of the second shaft The lubricating oil accommodated in the inner space formed by the non-driven-end cover and the housing through the clearance area of the oil ring and the supply groove formed in the spacer forms the non-driven end of the second shaft and the non- And is supplied on the adjacent region.
delete The method according to claim 1,
Wherein the transfer blade of the shaft has a shape removed from a part of the central point of the transfer part and is formed symmetrically with respect to a virtual vertical line of the center point perpendicular to the central axis of rotation of the shaft. The fluid pump.
The method of claim 3,
Wherein a connecting passage of the housing is connected to the discharge hole in an area corresponding to a center point of the shaft from which the conveying vane is removed, both ends of the connecting passage are connected to the inlet hole,
Wherein the fluid introduced through the inlet hole by the rotation of the at least two shafts rotated by the driving device is transferred from both ends of the connecting passage to the central region and discharged through the discharge hole. .
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