CN109798232B - Swash plate type plunger pump motor - Google Patents
Swash plate type plunger pump motor Download PDFInfo
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- CN109798232B CN109798232B CN201910248415.3A CN201910248415A CN109798232B CN 109798232 B CN109798232 B CN 109798232B CN 201910248415 A CN201910248415 A CN 201910248415A CN 109798232 B CN109798232 B CN 109798232B
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- swash plate
- driving shaft
- plunger pump
- distribution disc
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Abstract
The invention discloses a swash plate type plunger pump motor, and belongs to the technical field of hydraulic pressure. The invention provides a swash plate type plunger pump motor which comprises a cylinder barrel, a driving shaft, an oil distribution disc and an auxiliary support, wherein the oil distribution disc is arranged at one end of the cylinder barrel, and a plurality of oil cavities through which oil supply pipes pass are formed in the oil distribution disc; the auxiliary support is arranged between the cylinder barrel and the driving shaft, and comprises an outer sleeve and an inner sleeve, the inner sleeve is connected with the driving shaft, and the outer sleeve is connected with the cylinder barrel. The auxiliary support is internally provided with a cavity, the cylinder barrel is internally provided with an oil hole from the outer sleeve to the oil distribution disc in an inclined mode, and two ends of the oil hole are respectively communicated with the oil cavity and the cavity. The structure enables hydraulic oil to flow into the cavity through the oil hole to form a hydraulic support, so that the connection stability of the cylinder body and the driving shaft is improved, the eccentricity of the cylinder body during rotation is reduced, and meanwhile, the thickness of an oil film between the cylinder body and the oil distribution disc is uniform, and the abrasion is reduced; the rotating speed of the plunger pump is improved, and the service life of the plunger pump is prolonged.
Description
Technical Field
The invention relates to the technical field of hydraulic pressure, in particular to a swash plate type plunger pump motor.
Background
The main structure of the swash plate type plunger pump motor comprises a swash plate, a plunger piston shoe assembly, a driving shaft, a cylinder body and the like, wherein the connection between the cylinder body and the driving shaft is mainly completed by a spline C, and the spline C is matched with a certain gap and eccentricity, so that mechanical vibration can be caused in the rotation process of the cylinder body, an oil film between an oil distribution disc and the cylinder body is uneven, abrasion is formed, and the vibration not only hinders the function of the plunger pump, but also damages the physical and mental health of an operator and pollutes the environment.
Therefore, it is desirable to provide a swash plate type plunger pump motor to solve the technical problems of the prior art that the cylinder block and the driving shaft are easy to be eccentric during the rotation process, which causes mechanical vibration and abrasion of an oil film between an oil distribution disc and the cylinder block.
Disclosure of Invention
The invention aims to provide a swash plate type plunger pump motor, which is used for increasing the support between a cylinder body and a driving shaft, reducing the eccentricity of the cylinder body during rotation, reducing the oil film abrasion between the cylinder body and an oil distribution disc, and contributing to the improvement of the rotating speed of a plunger pump and the service life of the plunger pump.
In order to realize the purpose, the following technical scheme is provided:
the invention provides a swash plate type plunger pump motor which comprises a cylinder barrel, a driving shaft, an oil distribution disc and an auxiliary support, wherein the oil distribution disc is arranged at one end of the cylinder barrel, and a plurality of oil cavities through which oil supply pipes pass are formed in the oil distribution disc; the auxiliary support is arranged between the cylinder barrel and the driving shaft, the auxiliary support comprises an inner sleeve and an outer sleeve, the inner sleeve is connected with the driving shaft, the outer sleeve is connected with the cylinder barrel, a cavity is formed in the auxiliary support, an oil hole is formed in the cylinder barrel from the outer sleeve to the oil distribution disc in an inclined mode, and two ends of the oil hole are respectively communicated with the oil cavity and the cavity.
Furthermore, the outer sleeve is provided with a throttling hole, one end of the throttling hole is communicated with the oil hole, and the other end of the throttling hole is communicated with the cavity.
Further, the auxiliary support further comprises a sealing ring which is arranged between the inner sleeve and the outer sleeve along the circumferential direction of the driving shaft.
Furthermore, the auxiliary support further comprises a first retaining ring, a second retaining ring and a third retaining ring, the first retaining ring is arranged at one end, close to the oil distribution disc, of the auxiliary support, the second retaining ring is arranged at one end, far away from the oil distribution disc, of the auxiliary support, the third retaining ring is arranged at one end, close to the oil distribution disc, of the outer sleeve, the first retaining ring and the second retaining ring are both sleeved outside the driving shaft along the circumferential direction of the driving shaft, and the third retaining ring is sleeved on the cylinder barrel along the circumferential direction of the driving shaft.
Further, the throttle hole and the oil hole are provided in plurality, respectively.
Further, the cylinder barrel is connected with the driving shaft through a spline.
Further, the swash plate type plunger pump motor further comprises a swash plate, the swash plate is arranged at the other end of the cylinder barrel, and an included angle between the swash plate and the driving shaft is smaller than 90 degrees.
Furthermore, the swash plate type plunger pump motor further comprises a plunger piston shoe assembly, the plunger piston shoe assembly comprises a plunger and a piston shoe, the plunger is arranged inside the cylinder barrel, an oil cavity is formed between the plunger and the cylinder barrel, one end of the piston shoe is connected with the swash plate, and the other end of the piston shoe is connected with the plunger in a rotating mode.
Further, the axis of the plunger, the axis of the oil chamber and the axis of the cylinder barrel are all arranged in parallel with the axis of the driving shaft.
Furthermore, the driving shaft is arranged in the cylinder barrel and can drive the cylinder barrel to rotate; the oil distribution disc is perpendicular to the driving shaft.
Compared with the prior art, the swash plate type plunger pump motor provided by the invention has the advantages that the auxiliary support is arranged between the cylinder barrel and the driving shaft, one end of the oil hole arranged in the cylinder barrel is communicated with the oil cavity on the oil distribution disc, and the other end of the oil hole is communicated with the cavity in the auxiliary support. The structure enables hydraulic oil to flow into the cavity through the oil hole to form a hydraulic support, so that the connection stability of the cylinder body and the driving shaft is improved, the eccentricity of the cylinder body during rotation is reduced, and meanwhile, the thickness of an oil film between the cylinder body and the oil distribution disc is uniform, and the abrasion is reduced; the rotating speed of the plunger pump is improved, and the service life of the plunger pump is prolonged.
Drawings
Fig. 1 is a sectional view of a swash plate type plunger pump motor in an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a sectional view of an outer casing of a swash plate type plunger pump motor in an embodiment of the present invention.
Reference numerals: 1-a cylinder barrel; 2-a drive shaft; 3-oil distribution disc; 4-plunger shoe assembly; 41-a plunger; 42-a slipper; 5-a swash plate; 6-inner sleeve; 7-coating; an 8-orifice; 9-oil hole; 10-a cavity; 11-a sealing ring; 12-a first collar; 13-a second collar; 14-a spring; 15-third collar.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 2, the present embodiment provides a swash plate type plunger pump motor, which includes a cylinder 1, a driving shaft 2, an oil distribution disc 3 and an auxiliary support, wherein the oil distribution disc 3 is disposed at one end of the cylinder 1, and the oil distribution disc 3 is provided with a plurality of oil chambers through which oil supply pipes pass; the auxiliary bearing is arranged between the cylinder barrel 1 and the driving shaft 2, the auxiliary bearing comprises an inner sleeve 6 and an outer sleeve 7, the inner sleeve 6 is connected with the driving shaft 2, and the outer sleeve 7 is connected with the cylinder barrel 1. A cavity 10 is formed in the auxiliary support, an oil hole 9 is formed in the cylinder barrel 1 from the outer sleeve 7 to the oil distribution disc 3 in an inclined mode, and two ends of the oil hole 9 are respectively communicated with the oil cavity and the cavity 10. The structure enables hydraulic oil to flow into the cavity 10 through the oil cavity through the oil hole 9 to form a hydraulic support, so that the connection stability of the cylinder barrel 1 and the driving shaft 2 is improved, the eccentricity of the cylinder body during rotation is reduced, and meanwhile, the thickness of an oil film between the cylinder body and the oil distribution disc 3 is uniform, and the abrasion is reduced; the rotating speed of the plunger pump is improved, and the service life of the plunger pump is prolonged.
Further, an oil distribution window (not shown in the figure) is further formed in the oil distribution disc 3 and comprises an oil absorption window and an oil pressing window, the oil absorption window is used for oil inlet of the low-pressure side of the cylinder barrel 1 and the oil distribution disc 3, and the oil pressing window is used for oil inlet of the high-pressure side of the cylinder barrel 1 and the oil distribution disc 3. The swash plate type plunger pump motor further comprises a swash plate 5 and a plunger piston shoe assembly 4, the swash plate 5 is arranged at the other end of the cylinder barrel 1, and an included angle between the swash plate 5 and the driving shaft 2 is smaller than 90 degrees. The plunger piston shoe assembly 4 comprises a plunger 41 and a piston shoe 42, the plunger 41 is arranged inside the cylinder barrel 1, an oil cavity is arranged between the plunger 41 and the cylinder barrel 1, one end of the piston shoe 42 is connected with the swash plate 5, and the other end of the piston shoe 42 is rotatably connected with the plunger 41. In the embodiment, the axis of the plunger 41, the axis of the oil chamber and the axis of the cylinder barrel 1 are all arranged in parallel with the axis of the driving shaft 2, and the driving shaft 2 is arranged in the cylinder barrel 1 and can drive the cylinder barrel 1 to rotate; the oil distribution pan 3 is disposed perpendicularly to the drive shaft 2. Specifically, the plungers 41 are uniformly distributed in the cylinder 1 along the circumference, an inclination angle γ is formed between the swash plate 5 and the cylinder 1, the plungers 41 are tightly pressed on the swash plate 5, the oil distribution plate 3 is fixed and does not rotate, the driving shaft 2 penetrates through the swash plate 5 and the cylinder 1, and the cylinder 1 is connected with the driving shaft 2 through a spline. When the prime mover drives the cylinder 1 to rotate through the driving shaft 2, the plunger 41 is forced to reciprocate in the cylinder 1 due to the action of the swash plate 5, and oil is sucked and pressed through the oil suction window and the oil pressing window of the oil distribution disc 3.
Alternatively, as shown in fig. 2 and 3, a plurality of the oil holes 9 are formed in the cylinder tube 1, each oil hole 9 communicates with an oil chamber, and a high-pressure oil pipe or a low-pressure oil pipe is arranged to penetrate into the oil chamber. In order to ensure that the hydraulic pressure of the cavity 10 in the auxiliary support is slightly lower than the load pressure so as to ensure that hydraulic oil can be smoothly injected into the cavity 10 of the auxiliary support, the outer sleeve 7 is provided with a throttling hole 8, one end of the throttling hole 8 is communicated with the oil hole 9, and the other end of the throttling hole 8 is communicated with the cavity 10. Specifically, the throttle holes 8 are also provided in plural, one-to-one correspondence with the oil chambers and the oil holes 9, respectively, and as the load increases, the pressure of the hydraulic oil in the cavity 10 increases, thereby improving the cylinder stability.
Further, as shown in fig. 1 and 2, the auxiliary bearing further includes a sealing ring 11, a first retainer ring 12, a second retainer ring 13, and a third retainer ring 15, where the sealing ring 11 is disposed between the inner sleeve 6 and the outer sleeve 7 along the circumferential direction of the driving shaft 2, and is used for sealing the ends of the inner sleeve 6 and the outer sleeve 7 to prevent hydraulic oil from flowing out into the gap between the driving shaft 2 and the cylinder 1. A first retainer ring 12 is arranged at one end of the inner sleeve 6 close to the oil distribution disc 3, a second retainer ring 13 is arranged at one end of the auxiliary support far away from the oil distribution disc 3, and a third retainer ring 15 is arranged at one end of the outer sleeve 7 close to the oil distribution disc 3. Specifically, the first retainer ring 12 is sleeved outside the driving shaft 2 along the circumferential direction of the driving shaft 2 for positioning the right end of the inner sleeve 6, and the third retainer ring 15 is sleeved on the cylinder barrel 1 along the circumferential direction of the driving shaft 2 for positioning the right end of the outer sleeve 7. More specifically, one end of the inner sleeve 6 contacts the stepped portion of the drive shaft 2, and the other end contacts the first retainer ring 12. The second retainer ring 13 is arranged at one end corresponding to the step part of the driving shaft 2, the second retainer ring 13 is connected with the spring 14 and used for positioning the left end of the outer sleeve 7, and the right end of the outer sleeve 7 is positioned through the third retainer ring 15. In this structure of the auxiliary support, the stepped portion of the drive shaft 2, the first retainer ring 12, the second retainer ring 13, and the third retainer ring 15 position the inner sleeve 6 and the outer sleeve 7 in the axial direction together. Preferably, the sealing ring 11 in the present embodiment is a rubber sealing ring.
As shown in fig. 1 and 2, alternatively, the inner sleeve 6 and the outer sleeve 7 are both of an L-shaped structure with a cross section being placed transversely, the corner of the inner sleeve 6 is located at the left end, the left end of the inner sleeve 6 is in contact with the step portion of the driving shaft 2, the other end of the inner sleeve 6 is in contact with the first retainer ring 12, and the corner of the outer sleeve 7 is located at the right end, because the spring 14 has a certain pre-compression state in a normal state, the left end of the outer sleeve 7 is always in contact with the third retainer ring 15, when the cavity 10 is filled with hydraulic oil, the outer sleeve 7 moves rightward relative to the inner sleeve 6 under the tension of the spring 14 and the thrust of the hydraulic oil, and further pushes the third retainer ring 15 and the cylinder 1 to move rightward to compress an. The cavity 10 is formed between the inner sleeve 6 and the outer sleeve 7, and the seal rings 11 are provided at both ends of the cavity 10 between the inner sleeve 6 and the outer sleeve 7 in the circumferential direction of the drive shaft 2. The shapes of the inner sleeve 6 and the outer sleeve 7 are not limited to the L-shape, as long as the cavity 10 is formed or separately opened therebetween.
When the swash plate type plunger pump motor works, one side of the cylinder barrel 1 and the oil distribution disc 3 is a high-pressure side, a cavity 10 between the cylinder barrel 1 and the plunger 41 corresponding to the high-pressure side and an oil pressing window of the oil distribution disc 3 are filled with high-pressure oil, the other side of the cylinder barrel 1 and the plunger 41 corresponding to the low-pressure side and an oil absorption window of the oil distribution disc 3 are filled with low-pressure oil. The auxiliary support is communicated with an oil cavity for feeding high-pressure oil through one (or more) throttling holes 8 and oil holes 9 on part of the cylinder barrel 1; and is communicated with an oil cavity for feeding low-pressure oil through another throttle hole (or throttle holes) 8 and other oil holes 9.
When the hydraulic pump motor works, high-pressure oil on a high-pressure side enters a cavity 10 of the auxiliary support through an oil hole 9 and a throttling hole 8 on the outer sleeve 7 to form a hydraulic support, so that the connection stability of the cylinder barrel 1 and the driving shaft 2 is improved, and the stability of an oil film between the cylinder barrel 1 and the oil distribution disc 3 is improved; meanwhile, the oil hole 9 on the upper part of the cylinder barrel 1 is on the low-pressure side, the cavity 10 of the auxiliary support enters low-pressure oil through the throttling hole 8 on the outer sleeve 7 and the oil hole 9 on the cylinder barrel 1, the pressure of the hydraulic oil in the cavity 10 of the auxiliary support is slightly lower than the load pressure due to the action of the throttling hole 8, and the hydraulic pressure of the cavity 10 is increased along with the increase of the load, so that the stability of the cylinder barrel 1 is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A swash plate type plunger pump motor comprises a cylinder barrel (1), a driving shaft (2) and an oil distribution disc (3), wherein the oil distribution disc (3) is arranged at one end of the cylinder barrel (1), and a plurality of oil cavities through which oil supply pipes pass are formed in the oil distribution disc (3); the oil distribution device is characterized by further comprising an auxiliary support, wherein the auxiliary support is arranged between the cylinder barrel (1) and the driving shaft (2), the auxiliary support comprises an inner sleeve (6) and an outer sleeve (7), the inner sleeve (6) is connected with the driving shaft (2), the outer sleeve (7) is connected with the cylinder barrel (1), a cavity (10) is formed in the auxiliary support, an oil hole (9) is obliquely formed in the cylinder barrel (1) from the outer sleeve (7) to the oil distribution disc (3), and two ends of the oil hole (9) are respectively communicated with the oil cavity and the cavity (10);
the auxiliary support further comprises a first check ring (12), a second check ring (13) and a third check ring (15), the first check ring (12) is arranged at one end, close to the oil distribution disc (3), of the inner sleeve (6), the second check ring (13) is arranged at one end, far away from the oil distribution disc (3), of the auxiliary support, the third check ring (15) is arranged at one end, close to the oil distribution disc (3), of the outer sleeve (7), the first check ring (12) and the second check ring (13) are both sleeved outside the driving shaft (2) along the circumferential direction of the driving shaft (2), and the third check ring (15) is sleeved on the cylinder barrel (1) along the circumferential direction of the driving shaft (2).
2. A swash plate type plunger pump motor according to claim 1, wherein an orifice (8) is provided in the outer sleeve (7), and one end of the orifice (8) communicates with the oil hole (9) and the other end communicates with the cavity (10).
3. A swash plate type plunger pump motor according to claim 1, wherein the supplementary support further comprises a seal ring (11), the seal ring (11) being provided between the inner sleeve (6) and the outer sleeve (7) in a circumferential direction of the drive shaft (2).
4. The swash plate type plunger pump motor according to claim 2, wherein the orifice (8) and the oil hole (9) are provided in plurality, respectively.
5. A swash plate type plunger pump motor according to claim 1, wherein the cylinder tube (1) and the drive shaft (2) are connected by a spline.
6. A swash plate type plunger pump motor according to claim 1, further comprising a swash plate (5), the swash plate (5) being provided at the other end of the cylinder tube (1), an angle between the swash plate (5) and the drive shaft (2) being less than 90 °.
7. A swash plate type plunger pump motor according to claim 6, further comprising a plunger shoe assembly (4), wherein the plunger shoe assembly (4) comprises a plunger (41) and a shoe (42), the plunger (41) is disposed inside the cylinder (1), an oil chamber is disposed between the plunger (41) and the cylinder (1), and one end of the shoe (42) is connected to the swash plate (5) and the other end is rotatably connected to the plunger (41).
8. A swash plate type plunger pump motor according to claim 7, wherein the axis of the plunger (41), the axis of the oil chamber, and the axis of the cylinder tube (1) are all arranged in parallel with the axis of the drive shaft (2).
9. A swash plate type plunger pump motor according to claim 1, wherein the driving shaft (2) is provided in the cylinder tube (1) to be able to rotate the cylinder tube (1); the oil distribution disc (3) is perpendicular to the driving shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910248415.3A CN109798232B (en) | 2019-03-29 | 2019-03-29 | Swash plate type plunger pump motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910248415.3A CN109798232B (en) | 2019-03-29 | 2019-03-29 | Swash plate type plunger pump motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109798232A CN109798232A (en) | 2019-05-24 |
| CN109798232B true CN109798232B (en) | 2020-08-21 |
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ID=66564417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910248415.3A Active CN109798232B (en) | 2019-03-29 | 2019-03-29 | Swash plate type plunger pump motor |
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| Country | Link |
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| CN (1) | CN109798232B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796970A (en) * | 2020-12-30 | 2021-05-14 | 潍柴动力股份有限公司 | Parallel swash plate type axial plunger pump and engineering machinery |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3679328A (en) * | 1970-03-27 | 1972-07-25 | Applied Power Ind Inc | Variable pressure sensitive pump |
| US4932310A (en) * | 1989-06-01 | 1990-06-12 | The Oilgear Company | Bearing lubrication in axial piston fluid devices |
| DE4225381B4 (en) * | 1992-07-31 | 2005-11-10 | Linde Ag | Axial piston pump in swash plate design |
| SE510066C2 (en) * | 1997-08-25 | 1999-04-12 | Svenska Rotor Maskiner Ab | Oil-free screw rotor machine, the bearings of which are lubricated with an aqueous liquid |
| DE102012214830B4 (en) * | 2012-08-21 | 2022-06-30 | Robert Bosch Gmbh | Hydrostatic axial piston machine with adjustable swash plate or swivel cradle and associated slide bearing with hydrostatic pressure field, whose edge contour design minimizes the leakage flow into the housing |
| CN208416835U (en) * | 2018-05-22 | 2019-01-22 | 钟彪 | A kind of hydrostatic and swash plate plunger pump or motor comprising the structure |
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2019
- 2019-03-29 CN CN201910248415.3A patent/CN109798232B/en active Active
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| CN109798232A (en) | 2019-05-24 |
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