CN113586382B - Eccentric wear eliminating method for oil distribution disc of high-pressure plunger variable pump - Google Patents
Eccentric wear eliminating method for oil distribution disc of high-pressure plunger variable pump Download PDFInfo
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- CN113586382B CN113586382B CN202110966561.7A CN202110966561A CN113586382B CN 113586382 B CN113586382 B CN 113586382B CN 202110966561 A CN202110966561 A CN 202110966561A CN 113586382 B CN113586382 B CN 113586382B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
- F04B1/24—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract
The invention discloses a method for eliminating eccentric wear of an oil distribution disc of a high-pressure plunger variable pump, which comprises the following steps of: a. establishing a three-dimensional space coordinate system; b. the oil film pressure distribution cloud picture between the cylinder body and the spherical surface of the oil distribution disc is established through simulation, c, based on a three-dimensional space coordinate system and the oil film pressure distribution cloud picture, the side deflection force of the oil distribution disc in the X axis direction, the Y axis direction and the Z axis direction and the three deflection force around the X axis direction, the Y axis direction and the Z axis direction are obtained through simulation calculation, d, an oil duct is arranged between an oil inlet hole and an oil outlet hole of the oil distribution disc, a first oil port connected with the oil duct is arranged on the end face, close to the oil inlet hole, of the oil distribution disc, a second oil port is arranged on the cambered surface, close to the oil inlet hole, of the oil distribution disc, and the deflection force and the side deflection force of the oil distribution disc are reduced or eliminated. The invention has the advantage of preventing the eccentric wear of the oil distribution disc and can prolong the service life of the variable pump.
Description
Technical Field
The invention belongs to the field of high-pressure inclined shaft type variable plunger pumps, and particularly relates to a method for eliminating eccentric wear of an oil distribution disc of a high-pressure plunger variable pump.
Background
The structure of the high-pressure oblique shaft type plunger variable pump comprises a pump shell with an opening at one end, an adjuster shell is arranged at the opening end of the pump shell, a main shaft which is connected in a rotating mode is arranged in the pump shell, one end of the main shaft extends out of the pump shell, a cylinder body is arranged on the outer side of the other end of the main shaft, an included angle is formed between the axis of the cylinder body and the axis of the main shaft, a central rod is arranged between the cylinder body and the main shaft, a plurality of plunger rods which are distributed circumferentially are arranged on the outer side of the central rod, one end of the central rod and one end of each plunger rod are hinged to a main shaft ball, a central hole which is inserted into the other end of the central rod is formed in the cylinder body, a spring is arranged in the central hole, a plunger hole which is inserted into the plunger rod is arranged on one side of the cylinder body, an oil distribution disc which is connected with the adjuster in a sliding mode, one side of the oil distribution disc is a spherical surface which is hinged to the cylinder body ball, a slide way matched with the other side of the oil distribution disc in shape is arranged on the adjuster, an oil inlet hole and an oil outlet hole are arranged on the oil distribution disc, a deflector rod, and a deflector rod extending out bottom surface is inserted into the oil distribution slide way. The working principle of the conventional variable displacement pump is that a main shaft drives a cylinder body to rotate around the axis of the main shaft through a plunger, a spring provides elasticity to press the cylinder body on an oil distribution disc, a pressure oil film lubrication exists between the cylinder body and the oil distribution disc, a regulator controls a driving rod to rotate up and down to drive the oil distribution disc to slide in a cambered surface slideway of the regulator, the oil distribution disc drives the cylinder body to rotate up and down around a rotation center to change an included angle between the cylinder body and the main shaft, the displacement of the variable displacement pump is changed along with the rotation center, and the rotation center is a spherical center of a spherical hinge of a center rod and the main shaft. During the use process, the oil distribution disc is easy to generate eccentric wear, namely, a friction pair between the oil distribution disc and the regulator is easy to generate eccentric wear, so that the service life of the variable displacement pump is short. Therefore, a method is needed to prevent eccentric wear of the oil distribution pan and to improve the service life of the variable displacement pump.
Disclosure of Invention
The invention aims to provide a method for eliminating eccentric wear of an oil distribution disc of a high-pressure plunger variable pump. The invention has the advantage of preventing the eccentric wear of the oil distribution disc and can prolong the service life of the variable pump.
The technical scheme of the invention is as follows: an eccentric wear eliminating method for an oil distribution disc of a high-pressure plunger variable pump comprises the following steps:
a. establishing a three-dimensional space coordinate system, wherein the origin of the three-dimensional space coordinate system is the intersection point of the slide axis and the cylinder axis, the X axis of the three-dimensional space coordinate system is parallel to the slide axis, and the Z axis of the three-dimensional space coordinate system is vertical to the end surface of the regulator;
b. an oil film pressure distribution cloud picture between a cylinder body and the spherical surface of an oil distribution disc is established through simulation,
c. based on a three-dimensional space coordinate system and an oil film pressure distribution cloud picture, the offset force of the oil distribution disc in the X axis direction, the Y axis direction and the Z axis direction and three offset moments around the X axis direction, the Y axis direction and the Z axis direction are obtained through simulation calculation,
d. set up the oil duct between the inlet port and the oil outlet of joining in marriage the food tray, set up the first hydraulic fluid port of being connected with the oil duct on joining in marriage the food tray and being close to the end face of inlet port, set up the second hydraulic fluid port on joining in marriage the cambered surface that the food tray is close to the inlet port, make partly high-pressure fluid of oil outlet enter into join in marriage between the cambered surface that the food tray is close to the inlet port and the regulator, make partly high-pressure fluid of oil outlet enter into join in marriage between the end face that the food tray is close to the inlet port and the regulator, reduce or eliminate the deflection moment and the side force of joining in marriage the food tray.
In the method for eliminating eccentric wear of the oil distribution disc of the high-pressure plunger variable displacement pump, in the step d, a first throttling hole is formed between the first oil port and the oil passage to adjust the oil pressure of the first oil port, and a second throttling hole is formed in the oil passage to adjust the oil pressure of the second oil port.
In the method for eliminating the eccentric wear of the oil distribution disc for the high-pressure plunger variable displacement pump, in the step d, the pressure limiting ring surrounding the first oil port is arranged on the end surface of the oil distribution disc, so that the oil flowing out from the first oil port permeates into the pressure limiting ring 20 through a tiny gap between the oil distribution disc 10 and the slideway 16, the oil pressure of the oil flowing out from the first oil port on the oil distribution disc is increased, and the size of the oil pressure of the oil on the oil distribution disc is changed by changing the area of the pressure limiting ring 20.
In the method for eliminating eccentric wear of the oil distribution disc of the high-pressure plunger variable displacement pump, in the step d, there are two second oil ports.
In the method for eliminating eccentric wear of the oil distribution disc for the high-pressure plunger variable displacement pump, in the step c, the offset side forces of the oil distribution disc in the three directions of the X axis, the Y axis and the Z axis are Fx, fy and Fz respectively through simulation calculation, and the three offset moments around the X axis, the Y axis and the Z axis are Mx, my and Mz respectively;
in the step d, by changing the area of the pressure limiting ring 20, the oil pressure Fx and Fx generated by the oil liquid flowing out from the first oil port on the oil distribution disc are equal and opposite;
the size of a resultant force generated by the oil flowing out of the second oil port on the oil distribution disc is changed by changing the size of the second oil port or the diameter of the second throttling hole 22, the direction of the resultant force is changed by changing the position of the second oil port on the oil distribution disc, the resultant force is decomposed, an oil pressure Fy to the oil distribution disc is formed on the Y axis, an oil pressure Fz to the oil distribution disc is formed on the Z axis, and the Fy and the Fy are equal in size and opposite in direction, and the Fz and the Fz are equal in size and opposite in direction;
the length of the force arm of fx and Z axis is L1Z, the length of the force arm of fx and Y axis is L1Y, the length of the force arm of fy and Z axis is L2Z, the length of the force arm of fy and X axis is L2X, the length of fz and the force arm of Y axis is L2Y, and the length of fz and the force arm of X axis is L2X;
by changing the positions of the first oil port and the second oil port on the oil distribution disc, the deflection moment and the side deflection force on the oil distribution disc are eliminated, wherein Mx = fz L2y-fy L2z, -My = fx L1z-fz L2x and Mz = fy L2x-fx L1 y.
Compared with the prior art, through long-time research, experiments and analysis, the applicant finds that the main reason for the eccentric wear of the oil distribution disc is as follows: in the use process of the variable displacement pump, due to frequent occurrence of high-pressure variables, the oil distribution disc frequently rubs with the regulator, namely, the cambered surface on the oil distribution disc frequently rubs with the slideway on the regulator, due to the fact that a high-low pressure area exists on the spherical surface of the oil distribution disc, the high-pressure area is located near the oil outlet of the oil distribution disc, the low-pressure area is located near the oil inlet of the oil distribution disc, the high-low pressure area is not uniformly stressed, large deflection moment and lateral deflection force are generated on the oil distribution disc, large pressing force is generated between the oil distribution disc and the regulator, the friction pair between the oil distribution disc and the regulator is easily abraded, namely, the oil distribution disc is easily abraded (at the position pointed by M in figure 2), and the service life of the variable displacement pump is shortened. On the basis of the existing variable pump, the high-pressure oil near the oil outlet of the oil distribution disc is guided to the easily-worn area near the oil inlet of the oil distribution disc through the oil passage and the throttling hole to form static pressure supporting force so as to balance the deflection moment and the side force of the oil distribution disc, reduce or even avoid eccentric wear of the oil distribution disc and prolong the service life of the variable pump. Therefore, the invention has the advantage of preventing the eccentric wear of the oil distribution disc and can prolong the service life of the variable pump.
Drawings
Fig. 1 is a schematic view of a structure of a conventional variable displacement pump.
Fig. 2 is a schematic diagram of a prior art variable displacement pump regulator, oil distribution pan and cylinder after explosion.
Fig. 3 is a front view of the oil distribution pan of the present invention.
Fig. 4 is a left side view of the oil distribution pan of the present invention.
Fig. 5 is a cloud diagram of oil film pressure distribution on the spherical surface of the existing oil distribution disc.
The labels in the figures are: the oil pump comprises a pump shell 1, a regulator 2, a main shaft 3, a cylinder 4, a center rod 5, a plunger rod 6, a center hole 7, a spring 8, a plunger hole 9, an oil distribution disc 10, a spherical surface 11, a cambered surface 12, an oil inlet 13, an oil outlet 14, a deflector rod 15, a slideway 16, a first oil port 17, a first throttling hole 18, a second oil port 19, a pressure limiting ring 20, an oil duct 21 and a second throttling hole 22.
Detailed Description
The invention is further described with reference to the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A high-pressure plunger variable pump with an oil distribution disc not prone to eccentric wear is disclosed, as shown in figure 1, the high-pressure plunger variable pump comprises a pump shell 1 with an opening at one end, a regulator 2 is arranged at the opening end of the pump shell 1, a main shaft 3 connected in a rotating mode is arranged in the pump shell 1, one end of the main shaft 3 extends out of the pump shell 1, a cylinder body 4 is arranged on the outer side of the other end of the main shaft 3, an included angle is formed between the axis of the cylinder body 4 and the axis of the main shaft 3, a central rod 5 is arranged between the cylinder body 4 and the main shaft 3, a plurality of circumferentially distributed plunger rods 6 are arranged on the outer side of the central rod 5, one end of the central rod 5 and one end of each plunger rod 6 are both in spherical hinge joint with the main shaft 3, a central hole 7 inserted into the other end of the central rod 5 is arranged on the cylinder body 4, a spring 8 is arranged in the central hole 7, a plunger hole 9 inserted into the plunger rod 6 is arranged on the cylinder body 4, an oil distribution disc 10 connected in a sliding mode is arranged on one side of the cylinder body 4, a spherical surface 11 is hinged with the cylinder body 4, a slide 16 matched with the other side of the oil distribution disc 10 in a cambered surface 12, an oil distribution disc 10 is arranged on the other side, an oil inlet hole 13 and an oil distribution disc 15 connected with a deflector rod 15 connected with the plunger hole in the other side of the plunger hole, and a deflector rod 15 connected with the deflector rod 15, and a deflector rod.
The eccentric wear eliminating method of the oil distributing disc for the high-pressure plunger variable pump comprises the following steps: the method comprises the following steps:
a. establishing a three-dimensional space coordinate system, wherein the original point of the three-dimensional space coordinate system is the intersection point of the axis of the slideway 16 and the axis of the cylinder body 4, the X axis of the three-dimensional space coordinate system is parallel to the axis of the slideway 16, and the Z axis of the three-dimensional space coordinate system is vertical to the end face of the regulator 2;
b. an oil film pressure distribution cloud chart between the cylinder body 4 and the spherical surface 11 of the oil distribution disc 10 is established through simulation,
c. based on a three-dimensional space coordinate system and an oil film pressure distribution cloud picture, the offset force of the oil distribution disc 10 in the X-axis direction, the Y-axis direction and the Z-axis direction and three offset moments around the X-axis direction, the Y-axis direction and the Z-axis direction are obtained through simulation calculation,
d. an oil duct 21 is arranged between an oil inlet 13 and an oil outlet 14 of the oil distribution disc 10, a first oil port 17 connected with the oil duct 21 is arranged on the end face of the oil distribution disc 10 close to the oil inlet 13, and a second oil port 19 is arranged on the cambered surface 12 of the oil distribution disc 10 close to the oil inlet 13, so that part of high-pressure oil of the oil outlet 14 enters between the cambered surface 12 of the oil distribution disc 10 close to the oil inlet 13 and the regulator 2, and part of high-pressure oil of the oil outlet 14 enters between the end face of the oil distribution disc 10 close to the oil inlet 13 and the regulator 2, and the deflection moment and the side offset force of the oil distribution disc 10 are reduced or eliminated.
In the step d, the oil pressure of the first oil port 17 is adjusted by setting the first throttle 18 between the first oil port 17 and the oil passage 21, and the oil pressure of the second oil port 19 is adjusted by setting the second throttle 22 on the oil passage 21.
In the step d, a pressure limiting ring 20 surrounding the first oil port 17 is arranged on the end surface of the oil distribution disc 10, so that the oil flowing out from the first oil port 17 permeates into the pressure limiting ring 20 through a tiny gap between the oil distribution disc 10 and the slideway 16, the oil pressure of the oil flowing out from the first oil port 17 on the oil distribution disc 10 is increased, and the oil pressure of the oil on the oil distribution disc 10 is changed by changing the area of the pressure limiting ring 20.
In step d, there are two second oil ports 19.
In the step c, the offset forces of the oil distribution disc 10 in the three directions of the X axis, the Y axis and the Z axis are respectively Fx, fy and Fz, and the three offset moments around the X axis, the Y axis and the Z axis are respectively Mx, my and Mz through simulation calculation;
in the step d, the area of the pressure limiting ring 20 is changed, so that the oil pressure Fx generated by the oil liquid flowing out from the first oil port 17 on the oil distribution disc 10 is equal to Fx and opposite in direction;
the magnitude of resultant force generated by the oil liquid flowing out of the second oil port 19 on the oil distribution disc 10 is changed by changing the magnitude of the second oil port 19 or the diameter of the second throttle hole 22, the direction of the resultant force is changed by changing the position of the second oil port 19 on the oil distribution disc 10, the resultant force is decomposed, oil pressure Fy to the oil distribution disc 10 is formed on the Y axis, oil pressure Fz to the oil distribution disc 10 is formed on the Z axis, and the Fy and the Fy are equal in magnitude and opposite in direction, and the Fz and the Fz are equal in magnitude and opposite in direction;
the length L1Z of the force arm of fx and Z axis, the length L1Y of the force arm of fx and Y axis, the length L2Z of the force arm of fy and Z axis, the length L2X of the force arm of fy and X axis, the length L2Y of the force arm of fz and Y axis, and the length L2X of the force arm of fz and X axis;
by changing the positions of the first oil port 17 and the second oil port 19 on the oil distribution disc, the moment of deflection and the side offset force on the oil distribution disc are eliminated, and the oil distribution disc 10 cannot be eccentrically worn at the moment, -Mx = fz L2y-fy L2z, -My = fx L1z-fz L2x, and Mz = fy L2x-fx L1 y.
Because Fx, fy, fz, mx, my and Mz can be known through finite element calculation, the first oil port 17 and the second oil port 19 are limited in a geometric area on the surface of the oil distribution disc, the size of the oil distribution disc 10 is also known, the requirement of the three formulas is met, only one group of effective solutions exist, the length of each force arm can be calculated, and the specific positions of the first oil port 17 and the second oil port 19 on the oil distribution disc 10 can be known. Since the number of the first oil ports 17 is only 1, the position of the first oil ports 17 is unique, but the number of the second oil ports 19 is not limited, and may be one, two or more than three, but the range of the force field generated by one second oil port 19 is limited, and the processing of the more than three second oil ports 19 is troublesome, the number of the second oil ports 19 is preferably two in the embodiment. The two second oil ports 19 form resultant force to the oil pressure of the oil distribution disc, the resultant force passes through the middle point of the connecting line of the two second oil ports 19, and the specific position of the middle point on the cambered surface can be obtained according to the L1z, the L1y, the L2z and the L2x obtained through calculation, and the two second oil ports 19 only need to be symmetrically distributed on the cambered surface 12 about the middle point. In addition, in practice, when the number of the second oil ports 19 is changed to one, the position of the midpoint is the position of the second oil port 19; when the number of the second oil ports 19 is changed to three or more, the positions of the plurality of second oil ports 19 also need to be uniformly distributed around the midpoint position.
The invention has the advantage of preventing the eccentric wear of the oil distribution disc and can prolong the service life of the variable pump.
Claims (5)
1. An eccentric wear eliminating method for an oil distribution disc of a high-pressure plunger variable displacement pump is characterized by comprising the following steps: the high-pressure plunger variable displacement pump comprises a pump shell (1) with an opening at one end, a regulator (2) is arranged at the opening end of the pump shell (1), a main shaft (3) in rotary connection is arranged in the pump shell (1), one end of the main shaft (3) extends out of the pump shell (1), a cylinder body (4) is arranged on the outer side of the other end of the main shaft (3), an included angle is formed between the axis of the cylinder body (4) and the axis of the main shaft (3), a central rod (5) is arranged between the cylinder body (4) and the main shaft (3), a plurality of plunger rods (6) distributed in the circumferential direction are arranged on the outer side of the central rod (5), one end of the central rod (5) and one end of each plunger rod (6) are both in spherical hinge joint with the main shaft (3), a central hole (7) inserted by the other end of the central rod (5) is arranged on the cylinder body (4), a spring (8) is arranged in the central hole (7), a plunger hole (9) inserted by the plunger rod (6) is arranged on the cylinder body (4), a plunger hole (10) in which is arranged on one side of the cylinder body (4), a oil distribution disc (10) in sliding connection with the regulator (2), and one side of the oil distribution disc (11), the regulator (2) is in spherical hinge joint with the cylinder body (4) through a spherical surface (11), a slideway (16) matched with the other side of the oil distribution disc (10) in shape is arranged on the regulator, and an arc surface (12) is arranged on the other side of the oil distribution disc (10);
the method comprises the following steps: a. establishing a three-dimensional space coordinate system, wherein the origin of the three-dimensional space coordinate system is the intersection point of the axis of the slideway (16) and the axis of the cylinder body, the X axis of the three-dimensional space coordinate system is parallel to the axis of the slideway (16), and the Z axis of the three-dimensional space coordinate system is vertical to the end surface of the regulator;
b. establishing an oil film pressure distribution cloud picture between a cylinder body and a spherical surface (11) of an oil distribution disc (10) through simulation;
c. based on a three-dimensional space coordinate system and an oil film pressure distribution cloud picture, the offset force of the oil distribution disc (10) in the X-axis direction, the Y-axis direction and the Z-axis direction and three offset moments around the X-axis direction, the Y-axis direction and the Z-axis direction are obtained through simulation calculation;
d. an oil duct (21) is arranged between an oil inlet (13) and an oil outlet (14) of an oil distribution disc (10), a first oil port (17) connected with the oil duct (21) is arranged on the end face, close to the oil inlet (13), of the oil distribution disc (10), a second oil port (19) is arranged on the cambered surface (12), close to the oil inlet (13), of the oil distribution disc (10), so that part of high-pressure oil of the oil outlet (14) enters the space between the cambered surface (12), close to the oil inlet (13), of the oil distribution disc (10) and a regulator, part of high-pressure oil of the oil outlet (14) enters the space between the end face, close to the oil inlet (13), of the oil distribution disc (10) and the regulator, and deflection torque and side offset force of the oil distribution disc (10) are reduced or eliminated.
2. The method of eliminating eccentric wear of an oil distribution pan for a high-pressure plunger variable displacement pump according to claim 1, wherein: in the step d, a first throttling hole (18) is arranged between the first oil port (17) and the oil channel (21) to adjust the oil pressure of the first oil port (17), and a second throttling hole (22) is arranged on the oil channel (21) to adjust the oil pressure of the second oil port (19).
3. The method of eliminating eccentric wear of an oil distribution pan for a high-pressure plunger variable displacement pump according to claim 2, wherein: in the step d, a pressure limiting ring (20) surrounding a first oil port (17) is arranged on the end face of the oil distribution disc (10), so that oil flowing out of the first oil port (17) permeates into the pressure limiting ring (20) through a tiny gap between the oil distribution disc (10) and the slide way (16), the oil pressure of the oil flowing out of the first oil port (17) on the oil distribution disc (10) is increased, and the size of the oil pressure of the oil on the oil distribution disc (10) is changed by changing the area of the pressure limiting ring (20).
4. The method of eliminating eccentric wear of a oil distribution pan for a high-pressure plunger variable displacement pump according to claim 1, wherein: in the step d, two second oil ports are arranged.
5. The method of eliminating eccentric wear of a oil distribution pan for a high-pressure plunger variable displacement pump according to claim 3, wherein: in the step c, the offset side forces of the oil distribution disc (10) in the X-axis direction, the Y-axis direction and the Z-axis direction are respectively Fx, fy and Fz, and the three deflection moments around the X-axis direction, the Y-axis direction and the Z-axis direction are respectively Mx, my and Mz obtained through simulation calculation;
in the step d, the size of the oil pressure Fx and the direction of the oil pressure Fx generated by the oil distribution disc (10) by the oil liquid flowing out from the first oil port (17) are equal and opposite by changing the area of the pressure limiting ring (20);
the magnitude of resultant force generated by the oil liquid flowing out of the second oil port (19) on the oil distribution disc (10) is changed by changing the magnitude of the second oil port (19) or the diameter of the second throttling hole (22), the direction of the resultant force is changed by changing the position of the second oil port (19) on the oil distribution disc (10), the resultant force is decomposed, oil pressure Fy to the oil distribution disc (10) is formed on the Y axis, oil pressure Fz to the oil distribution disc (10) is formed on the Z axis, fy and Fy are equal in magnitude and opposite in direction, fz and Fz are equal in magnitude and opposite in direction;
the length L1Z of the force arm of fx and Z axis, the length L1Y of the force arm of fx and Y axis, the length L2Z of the force arm of fy and Z axis, the length L2X of the force arm of fy and X axis, the length L2Y of the force arm of fz and Y axis, and the length L2X of the force arm of fz and X axis;
by changing the positions of the first oil port (17) and the second oil port (19) on the oil distribution disc, the deflection moment and the side deflection force on the oil distribution disc are eliminated, wherein-Mx = fz L2y-fy L2z, -My = fx L1z-fz L2x and Mz = fy L2x-fx L1 y.
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|---|---|---|---|---|
| JPH0347482A (en) * | 1989-07-15 | 1991-02-28 | Hitachi Constr Mach Co Ltd | Slant shaft type liquid pressure machine with variable capacity |
| JPH03141872A (en) * | 1989-10-25 | 1991-06-17 | Hitachi Constr Mach Co Ltd | Bent axis type liquid pressure machine with variable capacity |
| EP2495441A1 (en) * | 2009-10-27 | 2012-09-05 | Hitachi Construction Machinery Co., Ltd. | Axial piston hydraulic rotating machine |
| CN101881253A (en) * | 2010-05-31 | 2010-11-10 | 中航力源液压股份有限公司 | Cambered axle-type hydraulic variable motor |
| CN202789364U (en) * | 2012-10-07 | 2013-03-13 | 四川省宜宾普什驱动有限责任公司 | High speed pump |
| CN112664421A (en) * | 2020-12-28 | 2021-04-16 | 西安精密机械研究所 | Split type multi-degree-of-freedom valve plate of variable fuel pump |
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| CN113586382A (en) | 2021-11-02 |
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Address after: No.29 Caohu Avenue, Xiangcheng District, Suzhou City, Jiangsu Province Applicant after: Suzhou Liyuan Hydraulic Co.,Ltd. Address before: 29 Caohu Avenue, Xiangcheng District, Suzhou, Jiangsu Province Applicant before: LIYUAN HYDRAULIC (SUZHOU) Co.,Ltd. |
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