A method and device for simulating a plunger pump experiment

Abstract

The present invention discloses a method and device for simulating a plunger pump experiment, and belongs to the technical field of plunger pumps. The plunger pump experiment method includes obtaining a target angle between the bottom of the plunger seat and the turntable in the simulation experiment based on the contact mode between the slipper and the swash plate in the actual working condition of the plunger pump; obtaining a first angle between the bottom of the plunger seat and the turntable that opens in a direction away from the central axis of the turntable; obtaining a wedge-shaped oil film formed between the bottom of the plunger seat and the turntable; obtaining a first amount of wear between the plunger seat and the turntable; and obtaining a second amount of wear between the slipper and the swash plate in the actual working condition of the plunger pump. The device for simulating the plunger pump experiment includes a turntable, a plunger cylinder assembly, a first drive assembly, and a second drive assembly; the first drive assembly drives the turntable to rotate; the second drive assembly drives the plunger seat to rotate; during the rotation of the plunger seat and the turntable, the inner contact pressure when the bottom of the plunger seat contacts the turntable is greater than the outer contact pressure, which solves the problem of low accuracy of the plunger pump experiment results.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, and in particular to a method and a device for a plunger pump simulation experiment. Background Art

[0002] As the power source of the hydraulic system, the hydraulic piston pump is a device that converts the mechanical energy of the prime mover into hydraulic energy. It is widely used in mechanical hydraulic systems such as aircraft and ships. The sliding shoe pair composed of the sliding shoe and the swash plate of the piston pump will move relative to each other with the reciprocating motion of the piston barrel. During the operation of the piston pump, there is a wedge-shaped oil film between the sliding shoe and the swash plate. The movement of the sliding shoe includes revolution relative to the axis of the swash plate, rotation relative to its own axis, and reciprocating linear motion along the axis of the pump.

[0003] There will be some wear between the slipper and the swash plate, which will cause abnormal increase in the return oil volume of the hydraulic plunger pump and other faults, and ultimately affect the life of the plunger pump. In addition, a layer of copper of a certain thickness is attached to the bottom surface of the slipper through a bimetallic bonding process. The thickness, hardness, and formula of this copper layer have a great influence on the performance and life of the slipper pair. In order to carry out research on the friction performance, leakage, and life of the slipper pair, it is necessary to carry out independent friction experiments.

[0004] The existing plunger pump experiment has the following problems: (1) The slipper is pressed vertically against the swash plate simulating the swash plate, without considering the wedge-shaped oil film caused by the centrifugal force of the slipper. In the actual operation of the plunger pump, the wedge-shaped oil film of the slipper pair has a great influence on the friction and wear of the slipper pair; (2) The slipper is pressed vertically against the swash plate simulating the swash plate, without considering the influence of the swash plate angle, but the constant simulation of the zero swash plate angle is used. In the actual operation of the hydraulic pump, the swash plate angle will change. At a non-zero swash plate angle, there is an angle between the plunger axis and the slipper axis: on the one hand, the ball socket-slipper oil damping hole area changes, and the oil film pressure changes; on the other hand, the force of the plunger ball head on the slipper ball socket is inclined; (3) The rotation of the slipper around its own axis is not considered; (4) There are few experimental stations, and it is not possible to carry out large-scale experiments. Due to the defects in the plunger pump experiment in the existing technology, the experimental results obtained are less accurate, which may affect the subsequent technical research of the plunger pump. Summary of the invention

[0005] In order to solve the problem of low accuracy of plunger pump test results, the present invention provides a method and device for a plunger pump simulation test.

[0006] According to a first aspect of the present invention, the present invention provides a method for a plunger pump simulation experiment, comprising:

[0007] Based on the contact mode between the sliding shoe and the swash plate in the actual working condition of the plunger pump, the target angle between the bottom of the plunger seat and the rotating plate in the simulation experiment is obtained;

[0008] Based on the target angle, the plunger is tilted on the plunger seat in a direction away from the central axis of the turntable, the plunger seat rotates relative to the turntable, and the turntable rotates relative to the plunger seat, and a first angle between the bottom of the plunger seat and the turntable is obtained, which is opened in a direction away from the central axis of the turntable;

[0009] Based on the consistency between the first angle and the target angle, a wedge-shaped oil film formed between the bottom of the plunger seat and the rotating disk is obtained;

[0010] Based on the wedge-shaped oil film, obtaining a first wear amount between the plunger seat and the rotating disk;

[0011] Based on the first wear amount, a second wear amount between the sliding shoe and the swash plate in an actual working condition of the plunger pump is obtained.

[0012] According to one embodiment of the present invention, based on the fact that the first angle is smaller than the target angle, the rotating disk is tilted relative to the plunger seat, and the first angle increases.

[0013] According to one embodiment of the present invention, based on the first angle being smaller than the target angle, a lateral loading force is applied to the plunger seat in a direction away from the central axis of the turntable, so as to obtain a second angle between the bottom of the plunger seat and the turntable that is open in a direction away from the central axis of the turntable;

[0014] Based on the second angle being consistent with the target angle, a wedge-shaped oil film formed between the plunger seat and the rotating disk is obtained.

[0015] According to one embodiment of the present invention, based on the second angle being smaller than the target angle, the target centrifugal force and the real-time centrifugal force of the plunger seat in the plunger pump simulation experiment are obtained;

[0016] Acquire a real-time lateral loading force and a target lateral loading force applied to the plunger seat based on the target centrifugal force and the real-time centrifugal force;

[0017] obtaining a side load force adjustment amount applied to the plunger seat based on the real-time side load force and the target side load force;

[0018] Based on the lateral load force adjustment amount, the lateral load force applied to the plunger seat in a direction away from the central axis of the turntable is adjusted to obtain the second angle being consistent with the target angle;

[0019] Based on the second angle being consistent with the target angle, a wedge-shaped oil film formed between the plunger seat and the rotating disk is obtained.

[0020] According to one embodiment of the present invention, the method for obtaining the wedge-shaped oil film includes, based on the first angle being consistent with the target angle, blowing air from one end of the bottom of the plunger seat close to the turntable along the end away from the turntable to obtain the wedge-shaped oil film formed between the bottom of the plunger seat and the turntable.

[0021] According to one embodiment of the present invention, based on the wedge-shaped oil film, the oil leakage and heat generation in the actual working condition of the plunger pump can also be obtained.

[0022] According to a second aspect of the present invention, the present invention provides a device for a plunger pump simulation experiment, comprising:

[0023] A turntable, wherein the turntable is arranged in a horizontal direction;

[0024] A plunger barrel assembly, the plunger barrel assembly comprising a plunger seat and a plunger barrel, the plunger seat being located on the end surface of the turntable, one end of the plunger barrel being located on the plunger seat, the plunger barrel being freely movable relative to the plunger seat along the circumferential direction of the central axis of the plunger seat, and the bottom of the plunger seat forming an angle with the horizontal plane direction of the turntable along its central axial direction;

[0025] A first driving component, the first driving component is drivingly connected to the turntable, and the first driving component can drive the turntable to rotate;

[0026] A second driving assembly, the second driving assembly is drivingly connected to the plunger seat, and the second driving assembly can drive the plunger seat to rotate;

[0027] A lateral loading force assembly, wherein the lateral loading force assembly pushes one end of the second driving assembly in a direction away from the plunger seat, so that the output end of the second driving assembly is offset in a direction close to the plunger seat;

[0028] The invention also comprises an air blowing component, wherein the air blowing component is located on one side of the plunger seat close to one end of the turntable.

[0029] According to a second aspect of the present invention, the present invention provides a device for a plunger pump simulation experiment, comprising:

[0030] The first driving assembly includes a first motor and a control mechanism. The first motor drives the turntable to rotate. The control mechanism is connected to the end of the turntable close to the edge. The control mechanism can drive the turntable to tilt.

[0031] According to one embodiment of the present invention, the second driving assembly includes a first gear, a second motor and a first bracket, the second motor is rotatably connected to the first bracket via a rotating shaft, the second motor can rotate relative to the first bracket, the first gear is connected to the output end of the second motor, the plunger seat sleeve is provided with a second gear meshing with the first gear, the second motor drives the first gear to drive the second gear to rotate, and the plunger seat rotates following the second gear.

[0032] According to one embodiment of the present invention, the lateral load force assembly includes a lateral force loading lever, the lateral force loading lever is connected to the second motor, the lateral force loading lever pushes the second motor to deviate in a direction away from the plunger seat, and the second motor drives the first gear to deviate in a direction close to the plunger seat. According to one embodiment of the present invention, the plunger barrel assembly is symmetrically arranged at both ends of the rotating disk;

[0033] The number of the plunger cylinder assemblies is n, wherein n≥2, and n is a natural number; the n plunger cylinder assemblies are distributed around the central axis of the turntable.

[0034] According to one embodiment of the present invention, it also includes a second bracket, which is provided with m connecting parts connected to the other end of the plunger barrel, the plunger barrel is positioned by the second bracket, and the position of the connecting part is set based on the angle between the central axis of the plunger barrel and the horizontal plane of the turntable, wherein m≥1, m is a natural number.

[0035] In order to solve the problem of low accuracy of plunger pump test results, the present invention has the following advantages:

[0036] 1. In the present invention, the plunger cylinder applies pressure along the central axis direction of the turntable to the plunger seat, so that during the rotation of the plunger seat and the turntable, the inner contact pressure when the bottom of the plunger seat contacts the turntable is greater than the outer contact pressure, so that the side with the smaller contact pressure between the bottom of the plunger seat and the turntable forms a tendency to tilt away from the turntable, thereby forming a first angle between the bottom of the plunger seat and the turntable. Based on the fact that the first angle is consistent with the target angle, a wedge-shaped oil film is formed between the bottom of the plunger seat and the turntable. After the wedge-shaped oil film is formed between the bottom of the plunger seat and the turntable, the wear between the bottom of the plunger seat and the turntable after the experiment is completed can be obtained. The first wear amount is obtained, and then because the contact mode between the bottom of the plunger seat and the turntable in the plunger pump simulation test simulates the contact mode between the slipper and the swash plate during the actual working condition of the plunger pump, the first angle between the bottom of the plunger seat and the turntable is consistent with the target angle, thereby ensuring that the wedge-shaped oil film formed is consistent with the wedge-shaped oil film formed in the actual working condition, and then the wear amount between the bottom of the plunger seat and the turntable can be used as the wear amount between the slipper and the swash plate in the actual working condition, that is, the first wear amount and the second wear amount are guaranteed, so that the first wear amount can be used as the second wear amount, thereby improving the accuracy of the results obtained from the plunger pump simulation experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A flow chart showing a method for simulating a plunger pump experiment according to the present invention is shown;

[0038] Figure 2 A schematic structural diagram of a plunger pump simulation experiment device of the present invention is shown;

[0039] Figure 3 A schematic structural diagram of a device for a plunger pump simulation experiment according to an embodiment is shown;

[0040] Figure 4 A schematic structural diagram of a device for a plunger pump simulation experiment according to another embodiment is shown.

[0041] Figure markings: 10-turntable; 20-plunger assembly; 21-plunger seat; 22-plunger cylinder; 23-second gear; 30-first drive assembly; 31-first motor; 40-second drive assembly; 41-first gear; 42-second motor; 43-first bracket; 44-rotating shaft; 50-lateral loading force assembly; 51-lateral force loading lever; 52-third bracket. DETAILED DESCRIPTION

[0042] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0043] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0044] According to the first aspect of the present invention, this embodiment discloses a method for simulating a plunger pump experiment, such as Figure 1 As shown, it may include:

[0045] Based on the contact mode between the sliding shoe and the swash plate in the actual working condition of the plunger pump, the target angle between the bottom of the plunger seat 21 and the rotating plate 10 in the simulation experiment is obtained;

[0046] Based on the target angle, the plunger is tilted on the plunger seat 21 in a direction away from the central axis of the turntable 10, the plunger seat 21 rotates relative to the turntable 10, and the turntable 10 rotates relative to the plunger seat 21, and a first angle between the bottom of the plunger seat 21 and the turntable 10 is obtained, which is open in a direction away from the central axis of the turntable 10;

[0047] Based on the consistency between the first angle and the target angle, a wedge-shaped oil film formed between the bottom of the plunger seat 21 and the rotating disk 10 is obtained;

[0048] Based on the wedge-shaped oil film, a first wear amount between the plunger seat 21 and the rotating disk 10 is obtained;

[0049] Based on the first wear amount, a second wear amount between the sliding shoe and the swash plate in an actual working condition of the plunger pump is obtained.

[0050] In this embodiment, if Figure 1 As shown, the plunger seat 21 simulates the slipper in the actual plunger pump, the plunger cylinder 22 simulates the plunger structure, and the turntable 10 simulates the swash plate. During the actual operation of the plunger pump, the slipper rotates and revolves at the same time, and the plunger also revolves, and the angle formed by the central axis along the extension direction of the plunger and the central axis direction of the slipper's rotation is less than 90°. The plunger exerts a certain lateral force on the slipper to a certain extent, and in the contact mode between the slipper and the swash plate, at time t0, the inner contact pressure between the slipper and the swash plate in the direction close to the central axis of the swash plate is greater than the outer contact pressure in the direction away from the central axis of the swash plate. After time t 0+n (n is greater than 0) and the sliding shoe and the swash plate form a micrometer-level angle that is open in the direction away from the central axis of the swash plate. The angle has an important influence on the wedge-shaped oil film formed between the sliding shoe and the swash plate, and further affects the results of the plunger pump simulation experiment. Based on this, this embodiment provides an experimental method for increasing the accuracy of the plunger pump experimental results.

[0051] In this embodiment, based on the contact mode between the slipper and the swash plate during the actual working process of the plunger pump, a micron-level angle opened in the direction away from the central axis of the swash plate is formed as the target angle between the bottom of the plunger seat 21 and the turntable 10 in the simulation experiment. During the simulation experiment, the rotation modes of the plunger seat 21 and the turntable 10 are both self-rotation. One end of the plunger cylinder 22 is located in the ball socket of the plunger seat 21, and the other end of the plunger cylinder 22 is inclined outwardly in a direction away from the central axis of the turntable 10. An angle of not 90° is formed between the plunger cylinder 22 and the plunger seat 21. The plunger cylinder 22 applies pressure to the plunger seat 21 in the direction of the central axis of the turntable 10, so that during the rotation of the plunger seat 21 and the turntable 10, the inner contact pressure of the bottom of the plunger seat 21 when in contact with the turntable 10 is greater than the outer contact pressure, so that the side with the smaller contact pressure between the bottom of the plunger seat 21 and the turntable 10 forms a tendency to tilt away from the turntable 10, so that the bottom of the plunger seat 21 and the turntable 10 are close to each other. A first angle is formed between the plunger seat 21 and the turntable 10. Based on the first angle being consistent with the target angle, a wedge-shaped oil film is formed between the bottom of the plunger seat 21 and the turntable 10. After the wedge-shaped oil film is formed between the bottom of the plunger seat 21 and the turntable 10, the first wear amount of the wear between the bottom of the plunger seat 21 and the turntable 10 after the experiment is completed can be obtained. Furthermore, in the plunger pump simulation test, the contact mode between the bottom of the plunger seat 21 and the turntable 10 simulates the contact mode between the slipper and the swash plate during the actual working condition of the plunger pump, so that the first angle between the bottom of the plunger seat 21 and the turntable 10 is consistent with the target angle, thereby ensuring that the formed wedge-shaped oil film is consistent with the wedge-shaped oil film formed in the actual working condition. Then, the wear amount between the bottom of the plunger seat 21 and the turntable 10 obtained can be used as the wear amount between the slipper and the swash plate in the actual working condition, that is, the first wear amount and the second wear amount are guaranteed, so that the first wear amount can be used as the second wear amount, thereby improving the accuracy of the results obtained in the plunger pump simulation experiment.

[0052] In this embodiment, in the actual working condition of the plunger pump, when the slipper and the plunger rotate, the angle between the plunger and the swash plate changes, and there is an angle between the plunger structure and the swash plate. In this embodiment, the angle between the central axis of the plunger barrel 22 and the horizontal plane of the turntable 10 is set to further increase the simulation of the experiment and thus increase the accuracy of the experimental results. The angle between the central axis of the plunger barrel 22 and the horizontal plane of the turntable 10 is obtained by real-time centrifugal force, so that the adjustment of the angle of the plunger barrel 22 is clearer and more targeted.

[0053] This embodiment obtains the oil film condition between the plunger seat 21 and the turntable 10 according to the angle between the central axis of the plunger cylinder 22 and the horizontal position of the turntable 10, the rotation condition of the turntable 10 and the rotation condition of the plunger seat 21, thereby reducing the difference between the oil film condition formed by the experimental plunger pump and the oil film condition of the actual plunger pump. Finally, this embodiment can obtain the experimental results based on the oil film condition obtained in the experiment, thereby improving the reliability of the experimental results.

[0054] According to an embodiment of the present invention, based on the fact that the first angle is smaller than the target angle, the rotary disk 10 is tilted relative to the plunger seat 21, and the first angle increases.

[0055] In this embodiment, the first angle is increased by tilting the rotary disk 10 relative to the plunger seat 21 so that the first angle is consistent with the target angle.

[0056] In some embodiments, the swash plate is alternately tilted along the first tilt direction and the second tilt direction, further reducing the oil film on the turntable 10 from being thrown out under the centrifugal force of the turntable 10 while ensuring the effect of the experimental simulation.

[0057] In some embodiments, the first tilting direction is opposite to the second tilting direction, further reducing the amount of the oil film on the turntable 10 thrown out under the centrifugal force of the turntable 10 .

[0058] In some embodiments, the frequency f of the alternating tilt of the swash plate is adjusted according to the time t, and the time t may be a specific time or a time period. This embodiment provides a method for adjusting the frequency of the swash plate tilting in different directions.

[0059] According to one embodiment of the present invention, based on the first angle being smaller than the target angle, a lateral loading force is applied to the plunger seat 21 in a direction away from the central axis of the turntable 10, so as to obtain a second angle between the bottom of the plunger seat 21 and the turntable 10, which is open in a direction away from the central axis of the turntable 10;

[0060] Based on the second angle being consistent with the target angle, a wedge-shaped oil film formed between the plunger seat 21 and the rotating disk 10 is obtained.

[0061] In this embodiment, the plunger seat 21 is rotated under the action of the lateral loading force, and the lateral loading force refers to the thrust applied to the plunger seat 21 to move the plunger seat 21 in the axial direction, and the plunger cylinder 22 originally on the plunger seat 21 remains unchanged on the plunger seat 21. During the movement of the plunger seat 21, the plunger cylinder 22 abuts against the plunger seat 21, so that the abutment between the plunger cylinder 22 and the plunger seat 21 forms a reaction force in the direction of the lateral loading force, and the centrifugal force of the plunger seat 21 is realized by the centrifugal force under the action of the lateral force, thereby further making the inner contact pressure of the bottom of the plunger seat 21 when contacting the turntable 10 greater than the outer contact pressure, and cooperating with the turntable 10 to ensure that the first angle is consistent with the target angle. The reliability of the experimental results is further increased.

[0062] According to one embodiment of the present invention, based on the second angle being smaller than the target angle, the target centrifugal force and the real-time centrifugal force of the plunger seat 21 in the plunger pump simulation experiment are obtained;

[0063] Acquire a real-time lateral loading force and a target lateral loading force applied to the plunger seat 21 based on the target centrifugal force and the real-time centrifugal force;

[0064] Obtaining a lateral load force adjustment amount applied to the plunger seat 21 based on the real-time lateral load force and the target lateral load force;

[0065] Based on the lateral load force adjustment amount, the lateral load force applied to the plunger seat 21 in a direction away from the central axis of the turntable 10 is adjusted to obtain the second angle being consistent with the target angle;

[0066] Based on the second angle being consistent with the target angle, a wedge-shaped oil film formed between the plunger seat 21 and the rotating disk 10 is obtained.

[0067] In this embodiment, the lateral loading force can be adjusted according to the situation in the simulation experiment to further improve the reliability of the experimental results.

[0068] Specifically, the calculation formula of the real-time centrifugal force of the plunger seat 21 is as follows:

[0069] F 实时离 =mw 2 ;

[0070] Among them, F 实时离 is the real-time centrifugal force of the plunger seat 21, m is the weight of a single plunger seat 21, and w 2 is the real-time angular velocity of the turntable 10, the same below. The weight of the plunger seat 21 can be obtained by weighing, three-dimensional model measurement, etc. By providing a method for calculating the real-time centrifugal force, the speed of obtaining the real-time centrifugal force can be accelerated, the experimental efficiency can be improved, and the reliability of the experimental results can be further improved.

[0071] The real-time lateral load force calculation formula is as follows:

[0072] F 实时加 =F 实时离 b / a;

[0073] Among them, F 实时加 is the real-time lateral load force on the plunger seat 21, that is, the real-time lateral load force, F 实时离 is the real-time centrifugal force, b is the distance from the rotation center of the first motor 31 to the position where it is connected to the first gear 41, and a is the distance from the rotation center of the first motor 31 to the position where it is connected to the loading lever. By calculating, the real-time lateral loading force applied by the lateral force loading lever 51 to the plunger seat 21 is obtained, so as to facilitate the adjustment of the lateral loading force that the lateral force loading lever 51 continues to apply to the plunger seat 21.

[0074] The target of this embodiment is F 目标加=F 实时加 , where F 目标加 is the target lateral load force, F 实时加 For real-time lateral loading force, the lateral loading force needs to be adjusted.

[0075] In order to obtain the consistency between the real-time lateral load force and the target lateral load force in the experiment, according to the plunger pump experiment: F 实时加 =F 实时离 b / a,F 实时离 =mw 2 ; The calculation formula for obtaining the lateral load force adjustment is as follows:

[0076] When the actual lateral load force is greater than the target lateral load force, F 目标离 =F 实时离 -x1, then F 目标加 =(F 实时离 -x1)b / a, F 目标加 -F 实时加 = first lateral load force adjustment amount;

[0077] When the actual lateral load is less than the target lateral load, F 目标离 =F 实时离 +x2, then F 目标加 =(F 实时离 +x2)b / a,F 实时加 -F 目标加 = the second lateral load force adjustment amount;

[0078] Among them, F 实时离 is the real-time centrifugal force, F 目标加 is the target lateral force, F 实时加 is the real-time lateral loading force, x1 and x2 are centrifugal force variables, b is the distance from the rotation center of the first motor 31 to the position where it is connected to the first gear 41, and a is the distance from the rotation center of the first motor 31 to the position where it is connected to the lateral force loading lever 51.

[0079] According to the above calculation formula, the lateral load force adjustment amount under different conditions can be obtained, so that the real-time lateral load force can be adjusted to reach the target lateral load force according to the lateral load force adjustment amount, thereby making the real-time lateral load force consistent with the target lateral load force, ensuring that the second angle is consistent with the target angle, so as to improve the reliability of the plunger pump test results.

[0080] According to one embodiment of the present invention, the method for obtaining the wedge-shaped oil film includes, based on the first angle being consistent with the target angle, blowing air from one end of the bottom of the plunger seat 21 close to the turntable 10 along the end away from the turntable 10 to obtain the wedge-shaped oil film formed between the bottom of the plunger seat 21 and the turntable 10.

[0081] In this embodiment, the formation of the wedge-shaped oil film is increased by blowing.

[0082] According to one embodiment of the present invention, based on the wedge-shaped oil film, the oil leakage and heat generation in the actual working condition of the plunger pump can also be obtained.

[0083] In this embodiment, the leakage amount of hydraulic oil and the heat generation of hydraulic oil between the plunger seat 21 and the turntable 10 can be determined by forming a wedge-shaped oil film, thereby improving the reliability of the experimental results. The heat generation can be measured during the experiment, and the wear and leakage can be measured after the experiment.

[0084] According to a second aspect of the present invention, Figure 2-4 As shown, this embodiment provides a device for a plunger pump simulation experiment, which may include:

[0085] A turntable 10, wherein the turntable 10 is arranged in a horizontal direction;

[0086] A plunger barrel 22 assembly, the plunger barrel 22 assembly comprises a plunger seat 21 and a plunger barrel 22, the plunger seat 21 is located on the end surface of the turntable 10, one end of the plunger barrel 22 is located on the plunger seat 21, the plunger barrel 22 can freely move relative to the plunger seat 21 along the circumferential direction of the central axis of the plunger seat 21, and the bottom of the plunger seat 21 has an angle with the horizontal plane direction of the turntable 10 along its central axial direction;

[0087] A first driving assembly 30, wherein the first driving assembly 30 is drivingly connected to the turntable 10, and the first driving assembly 30 can drive the turntable 10 to rotate;

[0088] A second driving assembly 40, wherein the second driving assembly 40 is drivingly connected to the plunger seat 21, and the second driving assembly 40 can drive the plunger seat 21 to rotate;

[0089] A lateral loading force assembly 50, wherein the lateral loading force assembly 50 pushes one end of the second driving assembly 40 in a direction away from the plunger seat 21, so that the output end of the second driving assembly 40 is offset in a direction close to the plunger seat 21;

[0090] The air blowing assembly is located on one side of the plunger seat close to one end of the turntable.

[0091] In this embodiment, the plunger seat 21 and the end surface of the turntable 10 form a pair of sliding shoes. The self-rotation of the turntable 10 can replace the rotation of the plunger seat 21 and the plunger barrel 22 around the central axis of the turntable 10, thereby reducing the structural settings and reducing the complexity of the experimental device structure. The self-rotating rotation mode of the turntable 10 and the plunger seat 21 is matched with the tilting mode of the plunger barrel 22, so that during the rotation of the plunger seat 21 and the turntable 10, the inner contact pressure of the bottom of the plunger seat 21 when in contact with the turntable 10 is greater than the outer contact pressure, so that the side with a small contact pressure between the bottom of the plunger seat 21 and the turntable 10 forms a tendency to tilt away from the turntable 10, so that an angle is formed between the bottom of the plunger seat 21 and the turntable 10, which is consistent with the angle between the sliding shoe and the inclined plate in the actual working condition of the plunger pump.

[0092] like Figure 3 As shown, the lateral loading force assembly 50 is connected to the second drive assembly 40, and pushes one end of the second drive assembly 40 in a direction away from the plunger seat 21, so that one end of the second drive assembly 40 is offset in a direction away from the plunger seat 21, and the output end of the second drive assembly 40 is offset in a direction close to the plunger seat 21. The thrust of the lateral loading force pushing one end of the second assembly to offset in a direction away from the plunger seat 21 is the lateral loading force, and the thrust applied to the plunger seat 21 by the output end of the second drive assembly 40 offset in a direction close to the plunger seat 21 is the real-time loading force of the plunger seat 21, and then the lateral loading force adjustment amount can be obtained according to the real-time lateral loading force and the target lateral loading force. The turntable 10 can rotate to match the setting of the lateral loading force assembly 50, improve the simulation effect of the contact mode between the plunger seat 21 and the turntable 10 simulating the contact mode between the actual sliding shoe and the swash plate, thereby providing the reliability of the plunger pump experimental results.

[0093] When the side loading force assembly 50 applies thrust to the second driving assembly 40, the movement mode of the second motor 42 forms a movement mode in which the second motor 42 can deflect around the rotating shaft 44 with the rotating shaft 44 as the rotation center. When the side loading force assembly 50 stops applying thrust to the second driving assembly 40, the first motor 31 will not deflect.

[0094] By setting the air blowing assembly, it is further ensured that the contact mode between the plunger seat 21 and the rotating disk 10 simulates the contact mode between the actual sliding shoe and the inclined plate.

[0095] In some embodiments, the structure of the plunger seat 21 and the actual sliding shoe, and the structure of one end of the plunger tube 22 and the plunger seat 21 that fits together are consistent with the structure of one end of the actual plunger that fits together with the sliding shoe.

[0096] In some embodiments, the plunger seat 21 is provided with a first medium inlet hole, and the plunger cylinder 22 is provided with a second medium inlet hole. The first medium inlet hole is connected to the second medium inlet hole, so that the first medium inlet hole and the second medium inlet hole can allow hydraulic oil to pass through, thereby forming an oil film at the bottom of the plunger seat 21.

[0097] In some embodiments, the plunger seat 21 is provided with a ball socket, and the other end of the plunger cylinder 22 is provided with a ball head, and the ball head cooperates with the ball socket. When the angle between the central axis of the plunger cylinder 22 and the horizontal plane of the turntable 10 is 90°, the ball socket, the ball head, the first medium inlet hole and the second medium inlet hole are coaxially arranged.

[0098] The plunger barrel 22 is provided with an oil inlet, which is connected to a constant pressure oil source to provide the required constant pressure on the one hand and to supplement the leakage in the plunger barrel 22 on the other hand.

[0099] In some embodiments, the angle between the central axis of the plunger cylinder 22 and the horizontal plane of the turntable 10 is 0-20°, which improves the experimental simulation effect.

[0100] In some embodiments, the second driving assembly 40 is provided with a centrifugal force sensor, and the rotation speed of the plunger seat 21 can be adjusted according to the centrifugal force sensor through the setting of the centrifugal force sensor.

[0101] In some embodiments, the side load force assembly 50 is provided with a side load force sensor, and the thrust of the side load force assembly 50 can be adjusted by the side load force sensor.

[0102] In some embodiments, the lateral loading force assembly 50 cooperates with the turntable 10 in a tiltable manner, further ensuring that the contact between the plunger seat 21 and the turntable 10 simulates the simulation effect.

[0103] According to one embodiment of the present invention, Figure 4 As shown, the first driving assembly 30 includes a first motor 31 and a control mechanism. The first motor 31 drives the turntable 10 to rotate. The control mechanism is connected to the end of the turntable 10 close to the edge. The control mechanism can drive the turntable 10 to tilt.

[0104] In this embodiment, if Figure 4 As shown, the first motor 31 is connected to the rotation center of the turntable 10. The first motor 31 drives the turntable 10 to rotate. Specifically, the control system is connected to the two end positions of the turntable 10 near the edge, and the turntable 10 is driven to tilt along the first tilt direction or the second tilt direction through the control system. Since the slipper rotates and revolves on the swash plate relative to the swash plate during the actual operation of the plunger pump, and the slipper rotates on the swash plate relative to the swash plate under the action of the plunger structure, a small angle may be formed between the slipper and the swash plate. Therefore, in this example, the turntable 10 is adjusted to tilt along the first direction or the second direction. Under the condition of ensuring the effect of the experimental simulation, the tilted turntable 10 can also reduce the oil film on the turntable 10 from being thrown out under the centrifugal force of the turntable 10 due to the angle formed between the tilted turntable 10 and the slipper, resulting in a reduction in the amount of oil film, which affects the experimental results.

[0105] In some embodiments, the first tilt direction and the second tilt direction are opposite tilt directions.

[0106] Preferably, the material, surface roughness, flatness and other parameters of the turntable 10 are consistent with the inclination of the plunger pump being analyzed, ie, the plunger pump working condition.

[0107] According to one embodiment of the present invention, Figure 2-4 As shown, the second driving assembly 40 includes a first gear 41, a second motor 42 and a first bracket 43. The second motor 42 is rotatably connected to the first bracket 43 through a rotating shaft 44. The second motor 42 can rotate relative to the first bracket 43. The first gear 41 is connected to the output end of the second motor 42. The plunger seat 21 is sleeved with a second gear 23 meshing with the first gear 41. The second motor 42 drives the first gear 41 to drive the second gear 23 to rotate, and the plunger seat 21 rotates following the second gear 23.

[0108] In this embodiment, by connecting the first gear 41 to the output end of the second motor 42 and setting the second gear 23 on the plunger seat 21, when the second motor 42 drives the first gear 41 to rotate, the first gear 41 drives the second gear 23 to rotate, and then the plunger seat 21 rotates following the second gear 23, and the first bracket 43 provides positioning for the second motor 42.

[0109] In some embodiments, the rotating shaft 44 is provided with a limiting structure to increase the positioning capability of the first motor 31 after deflection and improve the stability of the structure.

[0110] According to one embodiment of the present invention, Figure 2-4 As shown, the lateral loading force assembly 50 includes a lateral force loading lever 51, and the lateral force loading lever 51 is connected to the second motor 42. The lateral force loading lever 51 pushes the second motor 42 to deviate in a direction away from the plunger seat 21, and the second motor 42 drives the first gear 41 to deviate in a direction close to the plunger seat 21.

[0111] In this embodiment, a side loading lever is provided to provide a side loading force to the plunger seat 21 .

[0112] In some embodiments, the side load force assembly 50 further includes a third bracket 52 , and the side load force rod 51 is fixed by the third bracket 52 .

[0113] In some embodiments, the lateral force loading lever 51 may be a push rod, which can push the second motor 42 to deflect by rotating the push rod; the lateral force loading lever 51 may also include but is not limited to a screw rod, which can push the second motor 42 to deflect by rotating the screw rod.

[0114] According to one embodiment of the present invention, Figure 2 and Figure 4 As shown, the plunger cylinder 22 components are symmetrically arranged at both ends of the rotating disk 10;

[0115] There are n plunger cylinder 22 assemblies, wherein n≥2, and n is a natural number; the n plunger cylinder 22 assemblies are distributed around the central axis of the turntable 10 .

[0116] In this embodiment, the piston assembly is installed symmetrically with respect to the turntable 10. On the one hand, the number of plunger assemblies 20 is increased, and experiments can be carried out on a large scale. A plurality of experimental data can be obtained by setting a plurality of plunger assemblies 20, and the reliability of the experimental results can be improved based on the plurality of experimental results. On the other hand, the plunger assembly 20 can provide support for the turntable 10, thereby reducing the pressure on the structure supporting the turntable 10.

[0117] In some embodiments, n plunger cylinder 22 assemblies are evenly spaced around the central axis of the turntable 10 to avoid uneven force on the turntable 10 .

[0118] In some embodiments, among the n plunger assemblies 20 , the spacing between the central axes of adjacent plunger seats 21 and the central axis of the turntable 10 is consistent or inconsistent.

[0119] In some embodiments, the distances between the center axes of adjacent plunger seats 21 and the center axes of the turntable 10 are preferably consistent, so as to avoid uneven force on the turntable 10 .

[0120] In some embodiments, the angles between the plunger barrel 22 and the turntable 10 are preferably inconsistent. By setting the angles between the plunger barrel 22 and the turntable 10 to be consistent, multiple experimental data can be obtained, and the reliability of the experimental results can be improved based on multiple experimental results.

[0121] According to one embodiment of the present invention, it also includes a second bracket, which is provided with m connecting parts connected to the other end of the plunger cylinder 22, and the plunger cylinder 22 is positioned by the second bracket. The position of the connecting part is set based on the angle between the central axis of the plunger cylinder 22 and the horizontal plane of the turntable 10, wherein m≥1, and m is a natural number.

[0122] In the present embodiment, specifically, an ear shaft is provided at one end of the plunger barrel 22 away from the ball head, and the ear shaft is detachably connected to the connecting portion on the second bracket. The second bracket provides a position for the plunger barrel 22. The position of the connecting portion is set according to the angle between the central axis of the plunger barrel 22 and the horizontal plane of the turntable 10, so that the ear shaft can be selected to connect with the connecting portion at a suitable position according to the angle between the central axis of the plunger barrel 22 and the horizontal plane of the turntable 10, so that the inclination angle of the plunger barrel 22 can be adjusted. During the experiment, the piston barrel is positioned by the second bracket. When the inclination angle of the plunger barrel 22 needs to be adjusted, the ear shaft on the plunger barrel 22 is removed from the connecting portion on the second bracket and the plunger barrel 22 is rotated to install the ear shaft to a new desired connecting portion position.

[0123] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A method for a plunger pump simulation experiment, characterized in that: include: Based on the contact mode between the sliding shoe and the swash plate in the actual working condition of the plunger pump, the target angle between the bottom of the plunger seat and the rotating plate in the simulation experiment is obtained; Based on the target angle, the plunger is tilted on the plunger seat in a direction away from the central axis of the turntable, the plunger seat rotates relative to the turntable, and the turntable rotates relative to the plunger seat, and a first angle between the bottom of the plunger seat and the turntable is obtained, which is opened in a direction away from the central axis of the turntable; Based on the consistency between the first angle and the target angle, a wedge-shaped oil film formed between the bottom of the plunger seat and the rotating disk is obtained; Based on the wedge-shaped oil film, obtaining a first wear amount between the plunger seat and the rotating disk; Based on the first wear amount, a second wear amount between the sliding shoe and the swash plate in an actual working condition of the plunger pump is obtained.

2. The method for simulating a plunger pump experiment according to claim 1, characterized in that: When the first angle is smaller than the target angle, the rotating disk is tilted relative to the plunger seat, and the first angle increases.

3. The method for simulating a plunger pump experiment according to claim 1, characterized in that: When the first angle is smaller than the target angle, a lateral load force is applied to the plunger seat in a direction away from the central axis of the turntable to obtain a second angle between the bottom of the plunger seat and the turntable that is open in a direction away from the central axis of the turntable; Based on the second angle being consistent with the target angle, a wedge-shaped oil film formed between the plunger seat and the rotating disk is obtained.

4. A plunger pump simulation experiment method according to claim 3, characterized in that: Based on the second angle being smaller than the target angle, obtaining the target centrifugal force and the real-time centrifugal force of the plunger seat in the plunger pump simulation experiment; Acquiring a real-time lateral loading force and a target lateral loading force applied to the plunger seat based on the target centrifugal force and the real-time centrifugal force; obtaining a side load force adjustment amount applied to the plunger seat based on the real-time side load force and the target side load force; Based on the lateral load force adjustment amount, the lateral load force applied to the plunger seat in a direction away from the central axis of the turntable is adjusted to obtain the second angle being consistent with the target angle; Based on the second angle being consistent with the target angle, a wedge-shaped oil film formed between the plunger seat and the rotating disk is obtained.

5. The method for simulating a plunger pump experiment according to claim 1, characterized in that: The method for obtaining the wedge-shaped oil film includes, based on the first angle being consistent with the target angle, blowing air from one end of the bottom of the plunger seat close to the turntable along the end away from the turntable to obtain the wedge-shaped oil film formed between the bottom of the plunger seat and the turntable.

6. The method for simulating a plunger pump experiment according to claim 1, characterized in that: Based on the wedge-shaped oil film, the oil leakage and heat generation in the actual working condition of the plunger pump are also obtained.

7. A device for simulating a plunger pump experiment, characterized in that: include: A turntable, wherein the turntable is arranged in a horizontal direction; A plunger barrel assembly, the plunger barrel assembly comprising a plunger seat and a plunger barrel, the plunger seat being located on the end surface of the turntable, one end of the plunger barrel being located on the plunger seat, the plunger barrel being freely movable relative to the plunger seat along the circumferential direction of the central axis of the plunger seat, and the bottom of the plunger seat forming an angle with the horizontal plane direction of the turntable along its central axial direction; A first driving component, the first driving component is drivingly connected to the turntable, and the first driving component can drive the turntable to rotate; A second driving assembly, the second driving assembly is drivingly connected to the plunger seat, and the second driving assembly can drive the plunger seat to rotate; A lateral loading force assembly, wherein the lateral loading force assembly pushes one end of the second driving assembly in a direction away from the plunger seat, so that the output end of the second driving assembly is offset in a direction close to the plunger seat; The air blowing assembly is located on one side of the plunger seat close to one end of the turntable.

8. The device for simulating a plunger pump experiment according to claim 7, characterized in that: The first driving assembly includes a first motor and a control mechanism. The first motor drives the turntable to rotate. The control mechanism is connected to the end of the turntable close to the edge. The control mechanism can drive the turntable to tilt.

9. The device for simulating a plunger pump experiment according to claim 7, characterized in that: The second driving assembly includes a first gear, a second motor and a first bracket. The second motor is rotatably connected to the first bracket via a rotating shaft. The second motor can rotate relative to the first bracket. The first gear is connected to the output end of the second motor. The plunger seat sleeve is provided with a second gear meshing with the first gear. The second motor drives the first gear to drive the second gear to rotate, and the plunger seat rotates following the second gear.

10. The device for simulating a plunger pump experiment according to claim 9, characterized in that: The lateral loading force assembly includes a lateral force loading lever, which is connected to the second motor. The lateral force loading lever pushes the second motor to deviate in a direction away from the plunger seat, and the second motor drives the first gear to deviate in a direction close to the plunger seat.

11. The device for simulating a plunger pump experiment according to claim 7, characterized in that: The plunger cylinder assemblies are symmetrically arranged at both ends of the rotating disk; The number of the plunger cylinder assemblies is n, wherein n≥2, and n is a natural number; the n plunger cylinder assemblies are distributed around the central axis of the turntable.

12. The device for simulating a plunger pump experiment according to claim 7, characterized in that: It also includes a second bracket, which is provided with m connecting parts connected to the other end of the plunger barrel. The plunger barrel is positioned by the second bracket, and the position of the connecting part is set based on the angle between the central axis of the plunger barrel and the horizontal plane of the turntable, wherein m≥1, and m is a natural number.

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