CN220285914U - Rear cover with closed annular control oil path structure inside and hydraulic axial plunger pump - Google Patents
Rear cover with closed annular control oil path structure inside and hydraulic axial plunger pump Download PDFInfo
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- CN220285914U CN220285914U CN202321239548.2U CN202321239548U CN220285914U CN 220285914 U CN220285914 U CN 220285914U CN 202321239548 U CN202321239548 U CN 202321239548U CN 220285914 U CN220285914 U CN 220285914U
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- 239000012530 fluid Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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Abstract
The utility model relates to a rear cover with a closed annular control oil way structure inside and a hydraulic axial plunger pump. The shape, the size and the path of the cross section of the closed annular control oil way can be set according to the internal structure of the rear cover, and can be different along with any position of the circumference of the annular ring. The control valve can be arranged at any position and can be arranged at an optimal position according to the requirement of the oil fluid state. The control oil can flow in the annular oil path channel at will in the operation of the plunger pump, so that the control oil can be conveniently communicated with the control valve. The rear cover adopting the closed annular control oil way structure can enable the control oil way to be simple and effective under the condition of the same basic structure, facilitates the arrangement of the control valve position, reduces the heat and energy loss generated by oil transmission, and provides the plunger variable pump with high variable response, and meanwhile, the purposes of simplifying the structure and improving the reliability of products are achieved.
Description
Technical Field
The utility model relates to a hydraulic axial plunger pump in the field of hydraulic pumps, in particular to a rear cover with a closed annular control oil way structure and the hydraulic axial plunger pump.
Background
As shown in fig. 1, the hydraulic axial plunger variable pump mainly comprises a driving shaft 1; a housing 2; a wobble plate 3; a bowl 4; a return tray 5; a plunger shoe pair 6; a cylinder 7; an oil distribution tray 8; rear cover 10, etc.
Wherein the shell 2 is a barrel body with an opening at the rear end, and the rear cover 10 is sealed and fixed with the opening at the rear end of the shell. The center of the rear cover 10 and the center of the front part of the housing are provided with coaxial shaft holes in which the drive shaft 1 is placed. The cylinder 7 is concentrically fixed with the driving shaft through a spline of the central hole and is provided with a plurality of plunger holes 12 uniformly distributed on the circumference of a certain radius, and the bottom of the plunger holes is provided with waist-shaped through holes 13 for sucking and extruding oil. The oil distribution disc 8 is in sliding fit with the lower end face of the cylinder body and is fixed on the surface of the rear cover, two semicircular arc oil distribution holes 14 and 15 are formed in the position, corresponding to the kidney-shaped through hole at the bottom of the plunger hole, of the oil distribution disc, two semicircular arc oil distribution holes 16 and 17 are formed in the surface of the rear cover, corresponding to the two semicircular arc oil distribution holes of the oil distribution disc, and are communicated with the oil outlet hole 18 and the oil inlet hole 19 through channels in the rear cover. The plunger part of the plunger slipper pair 6 is arranged in the plunger hole of the cylinder body, and the slipper part is pressed and stuck on the upper surface of the wobble plate 3 by the ball bowl 4 and the return plate 5. The bottom surface of the swinging plate is provided with a left arc surface and a right arc surface, and the swinging plate can slide around the center of the arc on the two arc surfaces at two sides of the inner shaft hole of the shell. The included angle between the wobble plate and the driving shaft is changed through the adjusting device, so that the output flow of the plunger variable pump is controlled.
When the prime mover drives the cylinder body to rotate through the driving shaft, the plunger piston shoe pair also rotates along with the cylinder body around the axis, and meanwhile, as the plane of the wobble plate and the axis have a certain angle, the plunger piston shoe pair is forced to do reciprocating linear motion in the cylinder body, the volume of the plunger hole of the cylinder body is periodically changed, the volume is increased to absorb oil, and the volume is reduced to compress oil. Working oil in the cylinder plunger hole cavity is sucked and pressed out through the oil distribution disc, the two semicircular arc oil distribution holes of the rear cover, the inner oil passage of the rear cover and the oil inlet and outlet holes of the rear cover respectively.
When the variable plunger pump is in variable, the variable plunger pump needs to control oil by the control valve, the control valve is arranged on the rear cover, the variable mechanism is controlled to obtain or lose control force, the control oil flowing in the rear cover can only flow to the control valve through the one-way oil cavity, the control valve is limited by a process and a space structure, and the position arrangement of the one-way oil cavity in the rear cover and the control valve is greatly limited.
The rear cover is an oil cavity which can only supply oil liquid to flow in one direction, so that the direction of other oil paths needs to be changed in a plurality of times in a meandering way, and a plurality of redundant consumption is generated.
At present, when the hydraulic axial plunger variable pump actually works, due to the reasons of structure, control valve position setting and the like, a plurality of cross process holes are required to be processed for communicating the oil way of the pressure oil with the adjusting device, and the hydraulic axial plunger variable pump has defects in variable response, control valve position setting and reliability. The method mainly comprises the steps of relatively complex processing of process holes, inconvenient cleaning of blind holes, pollution of hydraulic system media if cleanliness is not up to standard, and influence on product reliability and service life.
In view of the above-mentioned drawbacks of the conventional hydraulic axial plunger pump, the present inventors have made continuous studies and designs, and have made repeated test samples and improvements, and finally have devised the present utility model with practical value.
Disclosure of Invention
The utility model aims to overcome the defects of complex processing technology of a control oil way and limited setting of a control valve position of the existing hydraulic axial plunger pump, and provides a novel rear cover with a closed annular control oil way structure inside and the hydraulic axial plunger pump, and aims to solve the technical problems that the control oil way is concise and effective, the control valve can be arranged at will, the variable response of the control valve is improved in actual work, and the product reliability is improved, so that the novel rear cover is more suitable for practical use.
Another object of the present utility model is to provide a rear cover and a hydraulic axial plunger pump with a novel structure having a closed annular control oil path structure inside, which aims to solve the technical problem of low energy consumption, simplify the structure, and thereby be more practical.
The utility model is designed to realize that the output flow of the variable pump can be adjusted at will according to the requirement, a control valve is arranged in the rear cover, and the oil in the working oil way is led into the adjusting device through the closed annular control oil way to become control oil for changing the angle of the wobble plate. The control oil path can be designed according to the internal structure of the rear cover, and the shape, the size and the path of the control oil path have important influence on the performance of the variable displacement pump.
The aim and the technical problems of the utility model are realized by adopting the following technical proposal.
The rear cover with the closed annular control oil way structure inside is provided with a control valve, and the inside of the rear cover is also provided with a closed annular control oil way which is formed around the axis.
Further, the cross section shape, the size and the path of the closed annular control oil way can be set according to the internal structure requirement of the rear cover, and can be different along with any position of the annular periphery.
Further, the control valve can be arranged at any position due to the closed annular control oil path.
Further, the position of the control valve can be arranged at the optimal position according to the requirement of the oil flow state.
The aim and the technical problems of the utility model are realized by adopting the following technical proposal.
The utility model provides a hydraulic axial plunger pump with a rear cover having a closed annular control oil path structure inside, which comprises: the device comprises a driving shaft, a shell, a swinging disc, a ball bowl, a return disc, a plunger sliding shoe pair, a cylinder body, an oil distribution disc and a rear cover, wherein the shell is a barrel body with an opening at the rear end, and the rear cover is fixed with the opening at the rear end of the shell in a sealing way; the center of the rear cover and the center of the front part of the shell are provided with coaxial shaft holes, and the driving shaft is arranged in the coaxial shaft holes; the cylinder body is concentrically fixed with the driving shaft through a spline of a central hole, the oil distribution disc is in sliding fit with the lower end face of the cylinder body and is fixed on the surface of the rear cover, a plunger part of a plunger sliding shoe pair is arranged in a plunger hole of the cylinder body, the plunger part is pressed against the upper surface of the swinging disc by a ball bowl and a return disc, the bottom surface of the swinging disc is provided with two circular arc surfaces left and right, the two circular arc surfaces on two sides of an inner shaft hole of the shell can slide around the circular arc center, a waist-shaped through hole for sucking and extruding oil is arranged at the bottom of the plunger hole of the cylinder body, two semicircular arc oil distribution holes are arranged at the position of the oil distribution disc corresponding to the waist-shaped through hole at the bottom of the plunger hole, two semicircular arc oil distribution holes are also correspondingly arranged at the position of the surface of the rear cover corresponding to the oil distribution disc, the oil outlet hole and the oil inlet hole are communicated through a channel inside the rear cover, the included angle between the swinging disc and the driving shaft is changed through an adjusting device, so as to control the flow output by the plunger variable pump, a control valve is arranged inside the rear cover, and a closed annular control oil way is arranged inside the rear cover, and the closed annular control oil way is formed around the shaft.
Further, the control valve can be arranged at any position due to the closed annular control oil path.
Further, the position of the control valve can be arranged at the optimal position according to the requirement of the oil flow state.
Compared with the prior art, the utility model has obvious advantages and beneficial effects. By means of the technical scheme, the method has at least the following advantages:
1. the rear cover is provided with a closed annular control oil way, so that oil can be controlled to circularly flow in the annular oil cavity.
2. When the rear cover structure is designed, the design position for conveniently and randomly arranging the control valve can be provided. The control oil way is simple and effective, the control valve position setting is convenient, and the application is flexible.
3. The closed annular control oil way is simple and effective, and reduces heat and energy loss generated by tortuous flow of oil.
4. The utility model has the advantages of high variable response, convenient maintenance and high product reliability.
Specific embodiments of the present utility model are given in detail by the following examples and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of a hydraulic axial plunger variable displacement pump of the present utility model.
Fig. 2 is a schematic structural view of a cylinder according to the present utility model.
Fig. 3A is a schematic elevational view of the structure of the prior oil distribution pan of the present utility model.
Fig. 3B is a schematic side view of the structure of the prior oil distribution pan of the present utility model.
Fig. 4A is a schematic structural view of the rear cover of the present utility model.
Fig. 4B is a cross-sectional view A-A of fig. 4A.
Fig. 4C is a B-B cross-sectional view of fig. 4B.
Wherein:
1: drive shaft 2: shell body
3: wobble plate 4: ball bowl
5: and a return tray 6: plunger sliding shoe pair
7: cylinder 8: oil distribution disc
9: control valve a 10: rear cover
11: control valve b
13: kidney-shaped through hole 14: first semicircular arc oil distributing hole
15: the second semicircular arc oil distributing hole 16: third semicircular arc oil distribution hole
17: fourth semicircular arc oil distributing hole 18: oil outlet
19: oil inlet hole 21: mounting hole of first control valve
22: mounting hole of second control valve
Detailed Description
In order to further describe the technical means and effects adopted by the utility model to achieve the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects of the rear cover and the hydraulic axial plunger pump with the closed annular control oil path structure according to the utility model by combining the attached drawings and the preferred embodiment.
Referring to fig. 1 and fig. 4A, fig. 4B and fig. 4C, a rear cover with a closed annular control oil path structure therein according to a preferred embodiment of the present utility model mainly includes: the control mechanism assembly mainly comprises a control valve and a closed annular control oil way, wherein: the closed annular control oil passage 20 forms a closed annular control oil passage around the axis line in the rear cover 10 of the pump.
The object of the present utility model and the solution to the technical problems thereof can be further achieved by the following technical measures.
Specifically, the cross-sectional shape, size and path of the closed annular control oil path can be set according to the internal structure of the rear cover 10, and can be different at any position along the circumference of the annular shape.
In particular, the control valve may be arbitrarily arranged in position by having a closed annular control oil passage.
Specifically, the position of the control valve can be arranged at an optimal position according to the requirement of the oil flow state.
Specifically, the closed annular control oil passage in the rear cover 10 may be cast, or may be formed by combining a cast hole and a machined hole or machining a hole according to a process. In fig. 4A, 4B and 4C, the rear cover 10 is a casting process. The first mounting hole 21 and the second mounting hole 22 in the drawings are mounting holes of the control valve. In the process of using the utility model, the type and the installation position of the control valve can be adjusted according to actual requirements.
As shown in fig. 1, the hydraulic axial plunger pump mainly comprises a driving shaft 1; a housing 2; a wobble plate 3; a bowl 4; a return tray 5; a plunger shoe pair 6; a cylinder 7; an oil distribution tray 8; a control valve 9a; a rear cover 10; control valve 11b, etc.
Wherein the shell 2 is a barrel body with an opening at the rear end, and the rear cover 10 is sealed and fixed with the opening at the rear end of the shell. The center of the rear cover 10 and the center of the front of the housing 2 are provided with coaxial shaft holes in which the drive shaft 1 is placed. The cylinder body 7 is concentrically fixed with the driving shaft 1 through a spline of a central hole, and is provided with a plurality of plunger holes 12 uniformly distributed on the circumference of a certain radius, and the bottom of the plunger holes 12 is provided with a waist-shaped through hole 13 for sucking and extruding oil. The oil distribution disc 8 is in sliding fit with the lower end face of the cylinder body 7 and is fixed on the surface of the rear cover 10, two first semicircular arc oil distribution holes 14 and two second semicircular arc oil distribution holes 15 are formed in the position, corresponding to the kidney-shaped through hole in the bottom of the plunger hole, of the oil distribution disc 9, two third semicircular arc oil distribution holes 16 and four semicircular arc oil distribution holes 17 are formed in the surface of the rear cover 10, corresponding to the two semicircular arc oil distribution holes of the oil distribution disc 8, and are communicated with the oil outlet hole 18 and the oil inlet hole 19 through a channel in the rear cover 10. The plunger part of the plunger slipper pair 6 is arranged in the plunger hole of the cylinder body, and the slipper part is pressed and stuck on the upper surface of the wobble plate 3 by the ball bowl 4 and the return plate 5. The bottom surface of the wobble plate 3 is provided with a left circular arc surface and a right circular arc surface, and the wobble plate can slide around the center of the circular arc on the two circular arc surfaces at two sides of the inner shaft hole of the shell 2. The included angle between the wobble plate 3 and the driving shaft is changed through an adjusting device, so that the output flow of the plunger variable pump is controlled.
When the prime motor drives the cylinder body to rotate through the driving shaft 1, the plunger piston shoe pair 6 also rotates along with the cylinder body around the axis, meanwhile, as the plane of the wobble plate 3 has a certain angle with the axis, the plunger piston shoe pair 6 is forced to do reciprocating linear motion in the cylinder body, the size of the volume of the plunger hole of the cylinder body is periodically changed, the volume is enlarged, the oil is absorbed, and the volume is reduced. Working oil in the cylinder plunger hole cavity is sucked and pressed out through the oil distribution disc 8, the two semicircular arc oil distribution holes of the rear cover, the inner oil passage of the rear cover 10 and the oil inlet and outlet holes of the rear cover 10 respectively. In order to realize that the output flow of the variable pump can be adjusted at will according to the requirement, a control valve 9a and a control valve 11b are required to be arranged in the rear cover 10, and the oil in the working oil way is introduced into the adjusting device through the closed annular control oil way 20 to become control oil for changing the angle of the wobble plate 3. The closed annular control oil path 20 can be designed according to the structure inside the rear cover 10, and the shape, size and path of the closed annular control oil path 20 have important influence on the performance of the variable displacement pump. Accordingly, the closed annular control oil passage 20 provided in the rear cover 10 forms a closed annular control oil passage around the axis line in the rear cover 10 of the pump. The cross-sectional shape, size and path of the closed-loop control oil path 20 can be set according to the internal structure of the rear cover 10, and can be different at any position along the circumference of the loop. The control valve can be arranged at any position due to the closed annular control oil passage 20, and the position of the control valve can be arranged at the optimal position according to the requirement of the oil flow state. In this embodiment, 2 control valves, i.e., a control valve 9a and a control valve 11b are provided.
The closed-loop control oil passage 20 is an annular passage for controlling the circulation of oil inside the rear cover 10. The control valve is installed in the corresponding mounting hole of the rear cover 10, and the control valve mounting hole is communicated with the closed annular control oil way 20 to enable the control oil to reach the control valve, so that the control adjusting device changes the angle of the wobble plate 3.
Because the closed annular control oil way 20 is annular, the control oil can circulate in the closed annular control oil way, the problem that the installation position of the control valve is limited by the internal structure of the rear cover 10, other oil ways, external shapes, manufacturing processes and the like is solved, and the control valve can be arranged at any convenient position and can be conveniently communicated with the closed annular control oil way 20, so that the function of controlling variables is realized.
The oil way with the existing structure can only enable the control oil to flow to the control valve in one direction. Therefore, when the control valve is limited and can only be installed at a certain position on the rear cover 10, the flow state of the control oil is not optimal, and a plurality of turning points can be generated, so that redundant loss and heat are generated.
The present utility model is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the utility model.
Claims (7)
1. Rear cover that inside has closed annular control oil circuit structure is equipped with control valve, its characterized in that: the rear cover is internally provided with a closed annular control oil way, and the closed annular control oil way is a closed annular control oil way formed around the axis.
2. The back cover with the closed annular control oil path structure in the back cover according to claim 1, wherein the cross section shape, the size and the path of the closed annular control oil path can be set according to the internal structure of the back cover and can be different at any position along the circumference of the ring.
3. The rear cover having a closed annular control oil passage structure inside according to claim 1, wherein said control valve is arranged at any position due to the closed annular control oil passage.
4. The rear cover with the closed annular control oil path structure inside according to claim 1, wherein the position of the control valve can be arranged at an optimal position according to the requirement of the oil flow state.
5. A hydraulic axial plunger pump having a rear cover with a closed annular control oil path structure therein, comprising: the device comprises a driving shaft, a shell, a swinging disc, a ball bowl, a return disc, a plunger sliding shoe pair, a cylinder body, an oil distribution disc and a rear cover, wherein the shell is a barrel body with an opening at the rear end, and the rear cover is fixed with the opening at the rear end of the shell in a sealing way; the center of the rear cover and the center of the front part of the shell are provided with coaxial shaft holes, and the driving shaft is arranged in the coaxial shaft holes; the cylinder body is concentrically fixed with the driving shaft through a spline of a central hole, the oil distribution disc is in sliding fit with the lower end face of the cylinder body and is fixed on the surface of the rear cover, a plunger part of a plunger sliding shoe pair is arranged in a plunger hole of the cylinder body, the plunger part is pressed against the upper surface of the swinging disc by a ball bowl and a return disc, the bottom surface of the swinging disc is provided with two circular arc surfaces left and right, the two circular arc surfaces on two sides of an inner shaft hole of the shell can slide around the circular arc center, a waist-shaped through hole for sucking and extruding oil is arranged at the bottom of the plunger hole of the cylinder body, two semicircular arc oil distribution holes are arranged at the position of the oil distribution disc corresponding to the waist-shaped through hole at the bottom of the plunger hole, two semicircular arc oil distribution holes are also correspondingly arranged at the surface of the rear cover and are communicated with the oil outlet hole and the oil inlet hole through a channel in the rear cover, the included angle between the swinging disc and the driving shaft is changed through an adjusting device, so as to control the flow output by the plunger variable pump, and the rear cover is internally provided with a control valve.
6. The hydraulic axial plunger pump with the rear cover having the closed annular control oil passage structure inside according to claim 5, wherein the control valve is arranged at any position due to the closed annular control oil passage.
7. The hydraulic axial plunger pump with the rear cover having the closed annular control oil path structure inside according to claim 5, wherein the position of the control valve can be arranged at an optimal position according to the requirement of the oil flow state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321239548.2U CN220285914U (en) | 2023-05-22 | 2023-05-22 | Rear cover with closed annular control oil path structure inside and hydraulic axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321239548.2U CN220285914U (en) | 2023-05-22 | 2023-05-22 | Rear cover with closed annular control oil path structure inside and hydraulic axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220285914U true CN220285914U (en) | 2024-01-02 |
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ID=89335146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321239548.2U Active CN220285914U (en) | 2023-05-22 | 2023-05-22 | Rear cover with closed annular control oil path structure inside and hydraulic axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220285914U (en) |
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2023
- 2023-05-22 CN CN202321239548.2U patent/CN220285914U/en active Active
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