CN114320869A - Method and device for balancing lateral force of axial plunger pump cylinder body - Google Patents
Method and device for balancing lateral force of axial plunger pump cylinder body Download PDFInfo
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- CN114320869A CN114320869A CN202111360625.5A CN202111360625A CN114320869A CN 114320869 A CN114320869 A CN 114320869A CN 202111360625 A CN202111360625 A CN 202111360625A CN 114320869 A CN114320869 A CN 114320869A
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- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 9
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- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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Abstract
The invention discloses a method for balancing the lateral force of an axial plunger pump cylinder body, which introduces part of oil reaching an oil distribution port between a valve plate and the cylinder body. The invention also provides a device for balancing the lateral force of the cylinder body of the axial plunger pump, which comprises a valve plate, a cylinder body and a plunger, wherein the cylinder body is rotatably connected with the valve plate, the plunger is slidably arranged in the cylinder body, the valve plate is provided with an oil suction port and an oil distribution port, the cylinder body can be communicated with the oil suction port and the oil distribution port, one side of the valve plate, which is close to the cylinder body, is provided with a high-pressure groove, and the high-pressure groove is communicated with the oil distribution port. According to the invention, part of oil is introduced between the valve plate and the cylinder body, the oil exerts an acting force on the cylinder body, the moment applied to the cylinder body is balanced, the contact force between the cylinder body and the main shaft is reduced, the cylinder body is prevented from inclining to press the main shaft, and the service life of the main shaft is prolonged. Meanwhile, the introduced oil can also play a role in improving the flow distribution side, and the overall working efficiency of the axial plunger pump is improved.
Description
Technical Field
The invention relates to the technical field of plunger pumps, in particular to a method and a device for balancing lateral force of an axial plunger pump cylinder body.
Background
The axial plunger pump is an important component of a hydraulic system of engineering machinery and can run efficiently at high pressure and various speeds. The flow distribution pair consisting of the cylinder body and the flow distribution plate is one of the most critical design elements in the rotating assembly of the axial plunger pump. The structural parameters of the axial plunger pump influence the service life of the axial plunger pump; when the axial plunger pump rotates at a high speed, the traditional axial plunger pump only considers pressing force and reverse thrust based on a plane thrust plate, the consideration on the lateral force causing the inclination of a cylinder body is less, the lateral force is always born by a main shaft, and the service life of the main shaft is greatly reduced.
Therefore, how to change the current situation that the service life of the main shaft is reduced due to the fact that the main shaft bears the lateral force which causes the inclination of the cylinder body in the working process of the axial plunger pump in the prior art becomes a problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a method and a device for balancing the lateral force of a cylinder body of an axial plunger pump, which are used for solving the problems in the prior art, balancing the lateral force borne by the cylinder body and prolonging the service life of a main shaft.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a method for balancing lateral force of an axial plunger pump cylinder body, which comprises the following steps:
the axial plunger pump comprises a cylinder body, a plunger and a valve plate, wherein the plunger is slidably arranged in the cylinder body, the cylinder body is rotatably connected with the valve plate, the valve plate is provided with an oil suction port and an oil distribution port, oil entering from the oil suction port enters the cylinder body, the plunger moves to send the oil to the oil distribution port and is output from the oil distribution port, and part of the oil reaching the oil distribution port is introduced between the valve plate and the cylinder body.
Preferably, part of the oil introduced between the port plate and the cylinder is located on one side of the port far away from the axis of the port plate.
Preferably, the first end oil pressure of the oil distribution port is higher than the second end oil pressure, and part of oil is introduced between the valve plate and the cylinder body from the first end of the oil distribution port.
The invention also provides a device for balancing the lateral force of the cylinder body of the axial plunger pump, which comprises a valve plate, a cylinder body and a plunger, wherein the cylinder body is rotatably connected with the valve plate, the plunger is slidably arranged in the cylinder body, the valve plate is provided with an oil suction port and an oil distribution port, the cylinder body can be communicated with the oil suction port and the oil distribution port, one side of the valve plate, which is close to the cylinder body, is provided with a high-pressure groove, and the high-pressure groove is communicated with the oil distribution port.
Preferably, the number of the oil distribution ports is multiple, the multiple oil distribution ports are distributed around the axis of the flow distribution plate, and the oil distribution port firstly communicated with the cylinder body is communicated with the high-pressure groove according to the rotation direction of the cylinder body.
Preferably, the high-pressure groove is positioned on one side of the oil distribution port far away from the axis of the flow distribution disc.
Preferably, the high-pressure tank is communicated with the oil distribution port by a flow passage.
Preferably, the high pressure groove is a waist-shaped groove.
Compared with the prior art, the invention has the following technical effects: the invention discloses a method for balancing lateral force of an axial plunger pump cylinder body, which comprises the following steps: the axial plunger pump comprises a cylinder body, a plunger and a valve plate, wherein the plunger is slidably arranged in the cylinder body, the cylinder body is rotatably connected with the valve plate, the valve plate is provided with an oil suction port and an oil distribution port, oil entering from the oil suction port enters the cylinder body, the plunger moves to send the oil to the oil distribution port and is output from the oil distribution port, and part of the oil reaching the oil distribution port is introduced between the valve plate and the cylinder body. The invention also provides a device for balancing the lateral force of the cylinder body of the axial plunger pump, which comprises a valve plate, a cylinder body and a plunger, wherein the cylinder body is rotatably connected with the valve plate, the plunger is slidably arranged in the cylinder body, the valve plate is provided with an oil suction port and an oil distribution port, the cylinder body can be communicated with the oil suction port and the oil distribution port, one side of the valve plate, which is close to the cylinder body, is provided with a high-pressure groove, and the high-pressure groove is communicated with the oil distribution port.
According to the method and the device for balancing the lateral force of the axial plunger pump cylinder body, part of oil is introduced between the valve plate and the cylinder body, the oil exerts acting force on the cylinder body, the moment applied to the cylinder body is balanced, the contact force between the cylinder body and the main shaft is reduced, the cylinder body is prevented from inclining to press the main shaft, and the service life of the main shaft is prolonged. Meanwhile, the introduced oil can also play a role in improving the flow distribution side, and the overall working efficiency of the axial plunger pump is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described 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 without creative efforts.
FIG. 1 is a schematic structural diagram of a device for balancing lateral force of a cylinder of an axial plunger pump according to the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic diagram illustrating a cylinder stress analysis of an axial plunger pump according to the prior art;
FIG. 4 is a schematic diagram of cylinder force analysis for balancing the lateral force of the axial plunger pump cylinder according to the present invention;
wherein, 1 is a cylinder body, 2 is a plunger piston, 3 is a thrust plate, 4 is an oil suction port, 5 is an oil distribution port, 6 is a high pressure groove, 7 is a flow passage, 8 is a sliding shoe, and 9 is a swash plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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.
The invention aims to provide a method and a device for balancing the lateral force of a cylinder body of an axial plunger pump, which are used for solving the problems in the prior art, balancing the lateral force borne by the cylinder body and prolonging the service life of a main shaft.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-4, fig. 1 is a schematic structural diagram of a device for balancing a lateral force of a cylinder of an axial plunger pump according to the present invention, fig. 2 is an enlarged structural diagram of a point a in fig. 1, fig. 3 is a schematic diagram of analyzing a force applied to the cylinder of the axial plunger pump according to the prior art, and fig. 4 is a schematic diagram of analyzing a force applied to the cylinder according to the method for balancing a lateral force of the cylinder of the axial plunger pump according to the present invention.
The invention provides a method for balancing lateral force of an axial plunger pump cylinder body, which comprises the following steps:
the axial plunger pump comprises a cylinder body 1, a plunger 2 and a valve plate 3, wherein the plunger 2 is slidably arranged in the cylinder body 1, the cylinder body 1 is rotatably connected with the valve plate 3, the valve plate 3 is provided with an oil suction port 4 and an oil distribution port 5, oil entering from the oil suction port 4 enters the cylinder body 1, the cylinder body 1 and the plunger 2 move to send the oil to the oil distribution port 5 and output from the oil distribution port 5, and part of the oil reaching the oil distribution port 5 is introduced between the valve plate 3 and the cylinder body 1.
According to the method for balancing the lateral force of the axial plunger pump cylinder body, part of oil is introduced between the valve plate 3 and the cylinder body 1, the oil exerts acting force on the cylinder body 1, and the moment borne by the cylinder body 1 is balanced, so that the contact force between the cylinder body 1 and a main shaft is reduced, the cylinder body 1 is prevented from obliquely pressing the main shaft, and the service life of the main shaft is prolonged. Meanwhile, the introduced oil can also play a role in improving the flow distribution side, and the overall working efficiency of the axial plunger pump is improved.
In the specific embodiment, part of the oil introduced between the valve plate 3 and the cylinder body 1 is located on one side of the oil distribution port 5 away from the axis of the valve plate 3, so that the introduced oil is prevented from leaking from the middle of the valve plate 3 as much as possible, and the introduced oil is ensured to play a role in applying acting force to the cylinder body 1 to balance the moment borne by the cylinder body 1.
In addition, in order to further ensure that the oil can reach the effect of reducing the contact force between the cylinder body 1 and the main shaft, the first end oil pressure of the oil distribution port 5 is higher than the second end oil pressure, part of the oil is introduced between the valve plate 3 and the cylinder body 1 from the first end of the oil distribution port 5, namely, high-pressure oil is introduced between the cylinder body 1 and the valve plate 3, so that the high-pressure oil can balance the moment applied to the cylinder body 1, and the first end of the oil distribution port 5 is the high-pressure oil end.
Besides, the invention also provides a device for balancing the lateral force of the cylinder body of the axial plunger pump, which comprises a thrust plate 3, a cylinder body 1 and a plunger 2, wherein the cylinder body 1 is rotatably connected with the thrust plate 3, the plunger 2 is slidably arranged in the cylinder body 1, the thrust plate 3 is provided with an oil suction port 4 and an oil distribution port 5, the cylinder body 1 can be communicated with the oil suction port 4 and the oil distribution port 5, one side of the thrust plate 3, which is close to the cylinder body 1, is provided with a high-pressure groove 6, and the high-pressure groove 6 is communicated with the oil distribution port 5.
According to the device for balancing the lateral force of the cylinder body of the axial plunger pump, the valve plate 3 is provided with the high-pressure groove 6, high-pressure oil is introduced into the high-pressure groove 6 communicated with the oil distribution port 5, the high-pressure groove 6 is positioned on one side of the valve plate 3 close to the cylinder body 1, so that the oil can apply acting force to the cylinder body 1, the moment applied to the cylinder body 1 is balanced, the contact force between the cylinder body 1 and a main shaft is reduced, the cylinder body 1 is prevented from obliquely pressing the main shaft, and the service life of the main shaft is prolonged. Here, the oil in the high-pressure groove 6 leaks out through the oil film between the cylinder 1 and the port plate 3 by the pressure difference in the axial plunger pump housing, and a flow leakage occurs.
In other embodiments of the present invention, the number of the oil distribution ports 5 is multiple, the multiple oil distribution ports 5 are distributed around the axis of the oil distribution plate 3, according to the rotation direction of the cylinder body 1, the oil distribution port 5 firstly communicated with the cylinder body 1 is communicated with the high pressure tank 6, the high pressure tank 6 is only communicated with the first oil distribution port 5 of the high pressure zone, when the high pressure oil flows into the high pressure tank 6, the high pressure oil generates an axial pressing force on the oil distribution plate 3, the oil distribution plate 3 applies a reaction force on the cylinder body 1, and the moment generated by the reaction force balances the moment borne by the cylinder body 1, thereby avoiding the phenomenon that the main shaft is obliquely pressed.
Specifically, when no oil is introduced, the stress and moment diagram of the cylinder block 1 is shown in fig. 3, and includes the pressing force of the cylinder block 1 on the port plate 3, the hydraulic thrust of the port plate 3 on the cylinder block 1, the mixed friction force along the Z axis on the cylinder block 1, the self gravity of the cylinder block 1, the acting force of the swash plate 9 on the cylinder block 1, and the contact force between the cylinder block 1 and the main shaft;
the force balance equation applied to the cylinder body 1 along the Z axis is as follows:
Fp-Ff-Fg＝0
wherein, FpFor pressing the cylinder 1 against the port plate 3, FfFor the hydraulic thrust of the port plate 3 against the cylinder 1, FgIs the mixed friction along the Z axis to which the cylinder body 1 is subjected;
the moment balance equation of the cylinder body 1 along the X-axis direction is as follows:
Mxp-Mxf-Mxa-Mxg＝0
wherein M isxpMoment, M, generated around the X axis for the pressing force of the cylinder body 1 on the valve plate 3xfMoment, M, about the X-axis, generated for the hydraulic counterthrust of the port plate 3 against the cylinder 1xgMoment, M, about the X-axis generated by the combined friction experienced by the cylinder 1xaMoment around the X axis is applied to the main shaft for the cylinder body 1;
the moment balance equation of the cylinder body 1 along the Y-axis direction is as follows:
Myp+Mymg-Myg-Myf-Mya＝0
wherein M isypMoment, M, generated around the Y axis for the pressing force of the cylinder body 1 on the port plate 3ymgMoment, M, generated around the Y-axis for the self-gravity of the cylinder body 1yfMoment, M, about the Y-axis, generated for the hydraulic counterthrust of the port plate 3 against the cylinder 1ygMoment, M, about the Y-axis generated by the combined friction experienced by the cylinder 1yaMoment around the Y axis is applied to the main shaft by the cylinder body 1;
after oil is introduced between the port plate 3 and the cylinder 1, the force and moment diagram of the cylinder 1 is shown in figure 4,
the moment balance equation of the cylinder body 1 along the Y-axis direction is as follows:
Myp+Mymg-Myg-Myf-Mya-My0＝0
wherein M isypMoment, M, generated around the Y axis for the pressing force of the cylinder body 1 on the port plate 3ymgMoment, M, generated around the Y-axis for the self-gravity of the cylinder body 1yfMoment, M, about the Y-axis, generated for the hydraulic counterthrust of the port plate 3 against the cylinder 1ygFor the moment about the Y-axis, M, resulting from the combined friction experienced by the cylinder 1yaMoment about the Y-axis, M, applied to the main shaft for the cylinder 1y0The moment generated around the Y axis is applied to the cylinder body 1 by the oil liquid;
it can be seen that the moment M formed after the introduction of the high-pressure oily0The moment M generated by the contact force of the main shaft can be greatly reducedyaThe contact force of the main shaft caused by the lateral force of the cylinder body 1 is reduced and the service life of the main shaft is prolonged from the angle of moment balance. Note that fig. 3 and 4 do not show the main shaft, and the shoe 8 and the swash plate 9 are shown.
In addition, the high-pressure groove 6 is located on one side of the oil distribution port 5 far away from the axis of the valve plate 3, when high-pressure oil flows into the oil distribution port 5 from the cylinder body 1, a part of the high-pressure oil enters the high-pressure groove 6, so that axial pressing force is generated on the valve plate 3, and the valve plate 3 applies counter force to the cylinder body 1.
Further, the high-pressure tank 6 is communicated with the oil distribution port 5 by a flow passage 7, and high-pressure oil enters the high-pressure tank 6 through the flow passage 7.
In the present embodiment, the high pressure tank 6 is a kidney-shaped tank, which improves the uniformity of the oil entering the high pressure tank 6 and avoids the concentrated influence of the acting force generated by the oil on the service life of the valve plate 3.
According to the invention, part of high-pressure oil is introduced between the valve plate 3 and the cylinder body 1, the oil exerts an acting force on the cylinder body 1, the moment applied to the cylinder body 1 is balanced, the abrasion condition caused by the inclination of the cylinder body 1 is reduced, meanwhile, the contact force between the cylinder body 1 and the main shaft is reduced, the main shaft is prevented from being pressed by the inclination of the cylinder body 1, and the service life of the main shaft is prolonged. In addition, the introduced oil can also play a role in improving the flow distribution side, and the overall working efficiency of the axial plunger pump is improved.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A method for balancing lateral force of a cylinder body of an axial plunger pump is characterized by comprising the following steps:
the axial plunger pump comprises a cylinder body, a plunger and a valve plate, wherein the plunger is slidably arranged in the cylinder body, the cylinder body is rotatably connected with the valve plate, the valve plate is provided with an oil suction port and an oil distribution port, oil entering from the oil suction port enters the cylinder body, the plunger moves to send the oil to the oil distribution port and is output from the oil distribution port, and part of the oil reaching the oil distribution port is introduced between the valve plate and the cylinder body.
2. The method of balancing axial plunger pump cylinder lateral forces of claim 1, wherein: and part of oil introduced between the valve plate and the cylinder body is positioned on one side of the oil distribution port, which is far away from the axis of the valve plate.
3. The method of balancing axial plunger pump cylinder lateral forces of claim 1, wherein: the first end oil pressure of the oil distribution port is higher than that of the second end oil pressure, and part of oil is introduced between the valve plate and the cylinder body from the first end of the oil distribution port.
4. The utility model provides a balanced axial plunger pump cylinder body yawing force's device which characterized in that: the cylinder body is rotationally connected with the valve plate, the plunger is slidably arranged in the cylinder body, the valve plate is provided with an oil suction opening and an oil distribution opening, the cylinder body can be communicated with the oil suction opening and the oil distribution opening, one side of the valve plate, which is close to the cylinder body, is provided with a high-pressure groove, and the high-pressure groove is communicated with the oil distribution opening.
5. The device for balancing the lateral forces of the cylinder of an axial piston pump according to claim 4, characterized in that: the number of the oil distribution ports is multiple, the oil distribution ports are distributed around the axis of the flow distribution plate, and the oil distribution port which is firstly communicated with the cylinder body is communicated with the high-pressure groove according to the rotation direction of the cylinder body.
6. The device for balancing the lateral forces of the cylinder of an axial piston pump according to claim 4, characterized in that: the high-pressure groove is positioned on one side of the oil distribution port, which is far away from the axis of the flow distribution disc.
7. The device for balancing the lateral forces of the cylinder of an axial piston pump according to claim 4, characterized in that: the high-pressure groove is communicated with the oil distribution port by a flow passage.
8. The device for balancing the lateral forces of the cylinder of an axial piston pump according to claim 4, characterized in that: the high pressure groove is a waist-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111360625.5A CN114320869A (en) | 2021-11-17 | 2021-11-17 | Method and device for balancing lateral force of axial plunger pump cylinder body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111360625.5A CN114320869A (en) | 2021-11-17 | 2021-11-17 | Method and device for balancing lateral force of axial plunger pump cylinder body |
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| CN114320869A true CN114320869A (en) | 2022-04-12 |
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| CN202111360625.5A Pending CN114320869A (en) | 2021-11-17 | 2021-11-17 | Method and device for balancing lateral force of axial plunger pump cylinder body |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050094U (en) * | 1989-04-25 | 1989-12-27 | 中国矿业大学北京研究生部 | End face port plate for axial plunger pump or motor |
| JPH08159012A (en) * | 1994-12-08 | 1996-06-18 | Hitachi Constr Mach Co Ltd | Hydraulic pump/motor |
| JPH10266947A (en) * | 1997-03-24 | 1998-10-06 | Ebara Corp | Axial piston type pump |
| CN101451516A (en) * | 2007-12-07 | 2009-06-10 | 卢堃 | 50Mpa self complementing electro-hydraulic proportional controlled axial direction plunger variable displacement pump |
| CN104776018A (en) * | 2014-12-26 | 2015-07-15 | 浙江工业大学 | Dynamic-static pressure lubricating type flow distribution plate |
| CN108119322A (en) * | 2017-11-08 | 2018-06-05 | 哈尔滨理工大学 | A kind of New Type Valve Plate for balancing tilting moment |
-
2021
- 2021-11-17 CN CN202111360625.5A patent/CN114320869A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050094U (en) * | 1989-04-25 | 1989-12-27 | 中国矿业大学北京研究生部 | End face port plate for axial plunger pump or motor |
| JPH08159012A (en) * | 1994-12-08 | 1996-06-18 | Hitachi Constr Mach Co Ltd | Hydraulic pump/motor |
| JPH10266947A (en) * | 1997-03-24 | 1998-10-06 | Ebara Corp | Axial piston type pump |
| CN101451516A (en) * | 2007-12-07 | 2009-06-10 | 卢堃 | 50Mpa self complementing electro-hydraulic proportional controlled axial direction plunger variable displacement pump |
| CN104776018A (en) * | 2014-12-26 | 2015-07-15 | 浙江工业大学 | Dynamic-static pressure lubricating type flow distribution plate |
| CN108119322A (en) * | 2017-11-08 | 2018-06-05 | 哈尔滨理工大学 | A kind of New Type Valve Plate for balancing tilting moment |
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