Device and method for detecting influence of vibration of high-pressure large-displacement radial plunger pump on oil film characteristics

Abstract

The invention relates to a device and a method for detecting influence of vibration of a high-pressure large-displacement radial plunger pump on oil film characteristics, the device comprises an experiment mechanism and a test control mechanism, a stator ring 9 is fixed by a stator retainer 6, and the outer side of the stator retainer 6 is connected with a base through a bearing; the rotor 8 is connected and sealed with the flow distribution shaft 2 and the driving shaft 13 through flanges, and the flow distribution shaft 2 and the driving shaft 13 are connected with the base through bearings; a plunger 11 and a sliding shoe 12 are connected through a spherical hinge pair, the plunger 11 is installed in a plunger hole in the side surface of the rotor 8, an electromagnetic vibration mechanism 17 is installed between the plunger hole and the plunger 11, and the surface of the sliding shoe 12 is located on the inner wall of the stator ring 9. The flow distribution shaft 2 is connected with an oil inlet pipe through a pipe joint 1; the driving shaft 13 is connected with a motor through a coupler 14 so as to drive the rotor 8 to rotate. The detection method is mainly realized through the steps of experiment parameter setting, device starting, testing, parameter changing, secondary testing, data processing and the like, the plunger vibration can be accurately controlled, the thickness and temperature of the sliding shoe oil film are measured in real time, and the oil film characteristic change trend under different vibrations and rotating speeds is visually reflected.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure and large-displacement radial piston pumps, and in particular to a technology for detecting the influence of the vibration of the piston pump on the oil film characteristics. Background Art

[0002] In the field of plunger pumps, there are some patents involving testing technology for the oil film of the slipper pair. For example, there is a multifunctional plunger pump slipper pair oil film field parameter test bench, which uses handles, small round nuts and other components to change the angle of the swash plate seat by rotating the tilting push rod and shake the handle to drive the rotating swash plate to rotate, and uses the relative position change of the sensor in the rotating swash plate to measure the oil film field parameters of multiple locations of the slipper elliptical trajectory with a small number of fixed position sensors. Although this patent is not specifically for high-pressure and large-displacement radial piston pumps, it provides a possible detection technology framework that can serve as a basis for studying the impact of vibration on oil film characteristics. The invention application with application number CN201510261628.1 discloses a multifunctional plunger pump slipper pair oil film field parameter test bench. The device includes a handle, a small round nut, a handwheel, a first deep groove ball bearing, a rotating shaft, a hexagonal nut, a crank, a sliding rod, a connecting shaft, etc. The test bench changes the angle of the swash plate seat relative to the housing by rotating the first inclination push rod and the second inclination push rod, and drives the rotating swash plate to rotate by shaking the handle, thereby realizing the transmission between the axis systems with variable axis angles, and then realizing the rotation of the rotating swash plate at different inclination angles. At the same time, the relative position of the sensor installed in the rotating swash plate in the elliptical trajectory of the sliding shoe changes, so that a small number of sensors (pressure sensors and eddy current displacement sensors) installed at fixed positions on the rotating swash plate can be used to measure the oil film field parameters at multiple positions on the elliptical motion trajectory of the sliding shoe.

[0003] The above-mentioned existing technology is difficult to accurately control the vibration frequency and amplitude of the piston, and is unable to measure the oil film thickness and temperature of the sliding shoe in real time when the radial piston pump is working, and it is difficult to intuitively present the changing trend of the oil film characteristics under different vibration and rotation speed conditions. Summary of the invention

[0004] The object of the present invention is to provide a device and method for detecting the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics.

[0005] The present invention is a detection device and a detection method for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics. The detection device includes an experimental mechanism and a test control mechanism. The experimental mechanism includes a plunger 11, a sliding shoe 12, a rotor 8, a stator ring 9, a distribution shaft 2, a drive shaft 13, a stator retainer 6, a bearing 10, a support frame 5, a coupling 14, an electromagnetic vibration mechanism 17, a motor, an eddy current sensor 23, and a temperature sensor 24; the stator ring 9 is fixed by the stator retainer 6, and the outer side of the stator retainer 6 is connected to the base through a bearing. The rotor 8 is connected to the distribution shaft 2 and the drive shaft 13 through flange connection and sealing, and the distribution shaft 2 and the drive shaft 13 are connected to the base through bearings; the plunger 11 and the sliding shoe 12 are connected through a ball joint pair, and the plunger 11 is installed in the plunger hole on the side surface of the rotor 8, and an electromagnetic vibration mechanism 17 is installed between the plunger hole and the plunger 11, and the surface of the sliding shoe 12 is on the inner wall of the stator ring 9; the distribution shaft 2 is connected to the oil inlet pipe through the pipe joint 1; the drive shaft 13 is connected to the motor through the coupling 14, so as to drive the rotor 8 to rotate; The test control mechanism includes a controller 21, an electromagnetic switch valve 19, a pressure control valve 20 and a host computer 22; the controller 21 is composed of a main control chip, and includes an interface circuit, an electromagnetic switch valve drive circuit, a pressure control valve drive circuit, an electromagnetic vibration mechanism 17 drive circuit, a motor drive circuit, a power supply circuit and a host computer interface circuit; the electromagnetic switch valve 19 controls the start and stop of the hydraulic system; the pressure control valve 20 controls the oil pressure in the oil chamber.

[0006] The detection method of the detection device for detecting the influence of vibration of the high-pressure and large-displacement radial piston pump on the oil film characteristics described above comprises the following steps: Step (1) Setting the experimental parameters: input the speed of the radial piston pump, the pressure of the input oil, the amplitude and frequency of the vibration required for the experiment on the upper computer 22 panel; Step (2) starting the device: opening the electromagnetic switch valve 19 to allow the oil to enter the oil chamber; turning on the motor to cause the radial piston pump to start rotating; Step (3) Testing: Start the vibration mechanism on the upper computer 22 panel and start recording the changes in the oil film thickness and the oil film temperature; Step (4) changing parameters: changing the motor speed, the frequency and amplitude of the vibration of the plunger 11 on the upper computer 22 panel; Step (5) Test again: Repeat step (3) and record the changes in oil film thickness and oil film temperature; Step (6) Data processing: Analyze the changes in oil film thickness and temperature under different speeds and vibrations, and draw a trend chart.

[0007] The benefits of the present invention are as follows: 1. It can more accurately control the vibration frequency and amplitude of the radial piston pump when the piston is working. 2. It solves the difficulty of not being able to measure the oil film thickness and temperature of the sliding shoe of the high-pressure and large-displacement radial piston pump in real time when the radial piston pump is working. 3. It can intuitively reflect the changing trend of the oil film thickness and temperature under different vibrations and different speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the structural diagram of the experimental organization. Figure 2 It is the structural block diagram of the test control mechanism. Figure 3 This is the appearance diagram of the sliding shoe structure. Figure 4 1 is a structural diagram of an electromagnetic vibration mechanism, wherein the reference numerals and corresponding names are: pipe joint, distribution shaft 2, small bearing 3, large bearing 4, stator retainer support 5; stator retainer 6, distribution shaft connecting cover 7, rotor 8, stator ring 9, bearing 10, plunger 11, slip shoe 12, drive shaft 13, coupling 14, electric slip ring 15, support plate 16, electromagnetic vibration mechanism 17, support frame 18, electromagnetic switch valve 19, pressure control valve 20, controller 21, host computer 22, eddy current sensor 23, temperature sensor 24, magnet 25, plunger part 26 of electromagnetic vibration mechanism, rotor part 27 of electromagnetic vibration mechanism, and coil 28. DETAILED DESCRIPTION

[0009] The present invention is a detection device and a detection method for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics. The detection device includes an experimental mechanism and a test control mechanism. The experimental mechanism includes a plunger 11, a sliding shoe 12, a rotor 8, a stator ring 9, a distribution shaft 2, a drive shaft 13, a stator retainer 6, a bearing 10, a support frame 5, a coupling 14, an electromagnetic vibration mechanism 17, a motor, an eddy current sensor 23, and a temperature sensor 24; the stator ring 9 is fixed by the stator retainer 6, and the outer side of the stator retainer 6 is connected to the base through a bearing. The rotor 8 is connected to the distribution shaft 2 and the drive shaft 13 through flange connection and sealing, and the distribution shaft 2 and the drive shaft 13 are connected to the base through bearings; the plunger 11 and the sliding shoe 12 are connected through a ball joint pair, and the plunger 11 is installed in the plunger hole on the side surface of the rotor 8, and an electromagnetic vibration mechanism 17 is installed between the plunger hole and the plunger 11, and the surface of the sliding shoe 12 is on the inner wall of the stator ring 9; the distribution shaft 2 is connected to the oil inlet pipe through the pipe joint 1; the drive shaft 13 is connected to the motor through the coupling 14, so as to drive the rotor 8 to rotate; The test control mechanism includes a controller 21, an electromagnetic switch valve 19, a pressure control valve 20 and a host computer 22; the controller 21 is composed of a main control chip, and includes an interface circuit, an electromagnetic switch valve drive circuit, a pressure control valve drive circuit, an electromagnetic vibration mechanism 17 drive circuit, a motor drive circuit, a power supply circuit and a host computer interface circuit; the electromagnetic switch valve 19 controls the start and stop of the hydraulic system; the pressure control valve 20 controls the oil pressure in the oil chamber.

[0010] In the detection device described above, an eddy current sensor 23 and a temperature sensor 24 are installed on the surface of the sliding shoe 12; an oil passage is opened inside the rotor 8, and connects each plunger hole and the oil passage in the middle of the distribution shaft 2.

[0011] In the detection device described above, the electromagnetic vibration mechanism 17 is installed on the plunger hole and the plunger (11), and is divided into two parts, one inside the plunger hole and the other on the surface of the plunger 11. The plunger 11 vibrates at a specific frequency and amplitude through the reversal of the current; the distribution shaft 2 is connected to the oil inlet pipe through the pipe joint 1, and can input high-pressure oil during rotation.

[0012] The detection device and the electromagnetic vibration mechanism described above have a threaded connection between the two parts and the plunger 11 and the plunger hole, which adopts an anti-loosening thread structure to prevent the connection from loosening during the vibration process.

[0013] In the above-mentioned detection device, the concave sealing ring between the distribution shaft 2 and the pipe joint 1 is made of a rubber material that is resistant to high temperature and high pressure and has a self-sealing compensation function.

[0014] The detection device described above has an electric slip ring 15 installed on the drive shaft 13, which can transmit the current signals measured by the eddy current sensor 23 and the temperature sensor 24 to the controller 21 during the operation of the experimental mechanism, and can also transmit the electrical signals of the controller 21 to the electromagnetic vibration mechanism 17.

[0015] In the detection device described above, the interface circuit, the eddy current sensor 23 and the temperature sensor 24 convert the analog signal of the sensor into a digital signal through the ADC chip, and convert it into the oil film thickness and oil film temperature through the algorithm in the control chip; the four drive circuits can respectively control the opening and closing of the electromagnetic switch valve 19, adjust the pressure value of the pressure control valve 20 by the set oil pressure, control the plunger 11 to vibrate with the set amplitude and frequency, and control the motor to rotate at the set speed through the instructions of the host computer; the host computer interface circuit connects the controller 21 chip and the host computer 22, and can transmit the processed oil film thickness and temperature information in the control chip to the host computer 22 for display, and can also transmit the parameters input in the host computer 22 to the control chip; the power supply circuit provides power supplies of different voltages to the electromagnetic switch valve 19, the pressure control valve 20, the electromagnetic vibration mechanism 17, the motor, the controller 21 and the host computer 22 respectively; and it also has overvoltage and overcurrent protection functions, and automatically cuts off the power supply circuit and sends an alarm signal when the voltage or current exceeds the preset threshold.

[0016] The detection method of the detection device for detecting the influence of the vibration of the high-pressure and large-displacement radial piston pump on the oil film characteristics described above comprises the following steps: Step (1) Setting the experimental parameters: input the speed of the radial piston pump, the pressure of the input oil, the amplitude and frequency of the vibration required for the experiment on the upper computer 22 panel; Step (2) starting the device: opening the electromagnetic switch valve 19 to allow the oil to enter the oil chamber; turning on the motor to cause the radial piston pump to start rotating; Step (3) Testing: Start the vibration mechanism on the upper computer 22 panel and start recording the changes in the oil film thickness and the oil film temperature; Step (4) changing parameters: changing the motor speed, the frequency and amplitude of the vibration of the plunger 11 on the upper computer 22 panel; Step (5) Test again: Repeat step (3) and record the changes in oil film thickness and oil film temperature; Step (6) Data processing: Analyze the changes in oil film thickness and temperature under different speeds and vibrations, and draw a trend chart.

[0017] The technical content of the present invention is further described below in conjunction with the accompanying drawings of the specification. The present invention is a device and method for real-time measurement of oil film thickness and oil film temperature of a high-pressure and large-displacement radial piston pump under different vibration frequencies and amplitudes. Figures 1 to 4As shown, the present invention is a detection device and method for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics. The detection device includes two parts: an experimental mechanism and a test control mechanism. The experimental mechanism includes a plunger 11, a sliding shoe 12, a rotor 8, a stator ring 9, a distribution shaft 2, a drive shaft 13, a stator retainer 6, a bearing 10, a support frame 5, a coupling 14, an electromagnetic vibration mechanism 17, a motor, an eddy current sensor 23, and a temperature sensor 24. The stator ring 9 is fixed by the stator retainer 6, and the outer side of the stator retainer 6 is connected to the base through a bearing; the rotor 8 is sealed with the distribution shaft 2 and the drive shaft 13 through a flange connection, and the distribution shaft 2 and the drive shaft 13 are connected to the base through a bearing to ensure that the stator ring 9 and the rotor 8 can rotate; the plunger 11 and the sliding shoe 12 are connected through a ball joint pair, and the plunger 11 is installed in the plunger hole on the side surface of the rotor 8, and an electromagnetic vibration mechanism 17 is installed between the plunger hole and the plunger 11, the surface of the sliding shoe 12 is on the inner wall of the stator ring 9, and the sliding shoe 12 An eddy current sensor 23 and a temperature sensor 24 are installed on the surface. An oil channel is opened inside the rotor 8, and each plunger hole and the flow channel in the middle of the distribution shaft 2 are connected; the electromagnetic vibration mechanism 17 consists of two parts, which are respectively installed on the surface of the plunger 11 and the inside of the plunger hole through threads; the distribution shaft 2 is connected to the oil inlet pipe through the pipe joint 1, and a concave sealing ring is sealed between the distribution shaft 2 and the pipe joint 1, so that high-pressure oil can be input during the rotation process; the drive shaft 13 is connected to the motor through the coupling 14, thereby driving the rotor 8 to rotate.

[0018] The test control mechanism includes a controller 21, an electromagnetic switch valve 19, a pressure control valve 20 and a host computer 22. The controller 21 is composed of a main control chip, and includes an interface circuit, an electromagnetic switch valve drive circuit, a pressure control valve drive circuit, an electromagnetic vibration mechanism 17 drive circuit, a motor drive circuit, a power supply circuit and a host computer interface circuit, wherein the interface circuit and the eddy current sensor 23 and the temperature sensor 24 convert the analog signal of the sensor into a digital signal through an ADC chip, and convert it into oil film thickness and oil film temperature through the algorithm in the control chip; wherein the electromagnetic switch valve drive circuit controls the opening and closing of the electromagnetic switch valve 19 through the command of the host computer 22; wherein the pressure control valve drive circuit adjusts the pressure value of the pressure control valve 20 through the oil pressure set by the host computer 22; wherein the electromagnetic vibration mechanism 17 drive circuit is connected to the control chip; The specific pulse current is input into the coil 28 of the electromagnetic vibration mechanism 17 through the amplitude and frequency set by the host computer 22, so that the plunger 11 vibrates with the set vibration amplitude and frequency; wherein the motor drive circuit controls the motor to work through the speed set by the host computer 22; wherein the power supply circuit provides power supplies of different voltages to the electromagnetic switch valve 19, the pressure control valve 20, the electromagnetic vibration mechanism 17, the motor, the controller 21 and the host computer 22 respectively; wherein the host computer interface circuit connects the controller 21 chip with the host computer 22, and can transmit the processed oil film thickness and temperature information in the control chip to the host computer 22 for display, and at the same time can transmit the parameters input in the host computer 22 to the control chip, thereby controlling the operation of other circuits. The electromagnetic switch valve 19 controls the start and stop of the hydraulic system. The pressure control valve 20 controls the oil pressure in the oil chamber.

[0019] like Figure 1 , Figure 3 As shown, two through holes are opened on both sides of the surface of the sliding shoe 12 , in which the eddy current sensor 23 and the temperature sensor 24 can be installed without affecting the normal movement of the sliding shoe 12 .

[0020] like Figure 4 As shown, an electric slip ring 15 is installed on the driving shaft 13, which can transmit the current signal measured by the eddy current sensor 23 and the temperature sensor 24 to the controller 21 during the operation of the experimental mechanism, and can also transmit the electrical signal of the controller 21 to the electromagnetic vibration mechanism 17.

[0021] like Figure 1 , Figure 4 As shown, the electromagnetic vibration mechanism 17 is divided into two parts, one part has a permanent magnet and is installed on the surface of the plunger 11 through threads, and the other part has an electromagnetic coil 28 and is installed in the plunger hole through threads.

[0022] Assume that it is necessary to measure the high pressure and large displacement radial piston pump at a speed of Z 1Change to Z 2 During the process, the amplitude of vibration is determined by A 1 becomes A 2 , the frequency is given by f 1 becomes f 2 During the process, the oil film thickness h and oil film temperature t What is the changing trend of . The method is as follows: The first step is to set the experimental parameters: enter the starting speed z of the radial piston pump in the host computer 22 1 , oil pressure P, and the initial amplitude of vibration A 1 and the starting frequency f 1 .

[0023] The second step is to start the device: start the electromagnetic switch valve 19 and the motor in the upper computer 22 respectively to start the experimental mechanism. After the speed of the experimental mechanism is stable, start the electromagnetic vibration mechanism 17.

[0024] Step 3: Testing: The controller 21 converts the electrical signals of the eddy current sensor 23 and the temperature sensor 24 into the thickness and temperature of the oil film through an algorithm, and plots the thickness and temperature of the oil film over time as a graph through software, wherein the algorithm formula is as follows: as well as ; In the formula h is the oil film thickness; t is the oil film temperature; U max It is the maximum voltage value after analog-to-digital conversion; x is the voltage value corresponding to the sensor after mode conversion; h max and t max are the maximum oil film thickness and temperature that the sensor can measure, respectively.

[0025] Step 4: Change the parameters: Change the speed of the motor in the host computer 2 from z 1 becomes z 2 The amplitude of the electromagnetic vibration mechanism 17 is given by A 1 Change A 2 The frequency is given by f 1 becomes f 2 .

[0026] Step 5. Test again: Repeat the process in step 3 and plot the changing trends of oil film thickness and temperature as the parameters change.

[0027] Step 6: Data processing: The charts drawn in steps 3 and 5 are summarized into the law of oil film thickness changing with time through software.

[0028] The above is a detailed description of the detection device and method for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics provided by the present invention. For those skilled in the art, according to the concept of the present invention, changes may occur in the specific implementation method and scope of application. Therefore, this specification should not be understood as a limitation of the present invention. Any changes within the scope of the basic concept of the present invention belong to the scope of the present invention, and the scope of patent protection of the present invention should be limited by the claims.

Claims

1. A detection device for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics, comprising an experimental mechanism and a test control mechanism, wherein the experimental mechanism comprises a plunger (11), a sliding shoe (12), a rotor (8), a stator ring (9), a distribution shaft (2), a drive shaft (13), a stator retainer (6), a bearing (10), a support frame (5), a coupling (14), an electromagnetic vibration mechanism (17), an electric motor, an eddy current sensor (23), and a temperature sensor (24), wherein the device is characterized in that The stator ring (9) is fixed by a stator retainer (6), and the outer side of the stator retainer (6) is connected to the base via a bearing; the rotor (8) is sealed with the distribution shaft (2) and the drive shaft (13) via a flange connection, and the distribution shaft (2) and the drive shaft (13) are connected to the base via a bearing; the plunger (11) and the sliding shoe (12) are connected via a ball joint pair, and the plunger (11) is installed in a plunger hole on the side surface of the rotor (8), an electromagnetic vibration mechanism (17) is installed between the plunger hole and the plunger (11), and the surface of the sliding shoe (12) is on the inner wall of the stator ring (9); the distribution shaft (2) is connected to the oil inlet pipe via a pipe joint (1); the drive shaft (13) is connected to the motor via a coupling (14), thereby driving the rotor (8) to rotate; The test control mechanism comprises a controller (21), an electromagnetic switch valve (19), a pressure control valve (20) and a host computer (22); the controller (21) is composed of a main control chip, and includes an interface circuit, an electromagnetic switch valve drive circuit, a pressure control valve drive circuit, an electromagnetic vibration mechanism (17) drive circuit, a motor drive circuit, a power supply circuit and a host computer interface circuit; the electromagnetic switch valve (19) controls the start and stop of the hydraulic system; and the pressure control valve (20) controls the oil pressure in the oil chamber.

2. The detection device for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics according to claim 1 is characterized in that An eddy current sensor (23) and a temperature sensor (24) are mounted on the surface of the sliding shoe (12); an oil passage is provided inside the rotor (8) and connects each plunger hole and the oil passage in the middle of the distribution shaft (2).

3. The detection device for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics according to claim 1 is characterized in that The electromagnetic vibration mechanism (17) is installed on the plunger hole and the plunger (11), and is divided into two parts, one inside the plunger hole and the other on the surface of the plunger (11). The plunger (11) vibrates at a specific frequency and amplitude through the reversal of the current; the distribution shaft (2) is connected to the oil inlet pipe through the pipe joint (1), and can input high-pressure oil during rotation.

4. The detection device for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics according to claim 3, wherein the electromagnetic vibration mechanism is characterized in that The threaded connection between the two parts and the plunger (11) and the plunger hole adopts an anti-loosening thread structure to prevent the connection from loosening during vibration.

5. The detection device for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics according to claim 3 is characterized in that The concave sealing ring between the distribution shaft (2) and the pipe joint (1) is made of a rubber material that is resistant to high temperature and high pressure and has a self-sealing compensation function.

6. The detection device for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics according to claim 1 is characterized in that An electric slip ring (15) is installed on the drive shaft (13), which can transmit the current signal measured by the eddy current sensor (23) and the temperature sensor (24) to the controller (21) during the operation of the experimental mechanism, and can also transmit the electric signal of the controller (21) to the electromagnetic vibration mechanism (17).

7. The detection device for the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics according to claim 1 is characterized in that The interface circuit, the eddy current sensor (23) and the temperature sensor (24) convert the analog signal of the sensor into a digital signal through an ADC chip, and convert it into the oil film thickness and the oil film temperature through the algorithm in the control chip; the four drive circuits can respectively control the opening and closing of the electromagnetic switch valve (19), adjust the pressure value of the pressure control valve (20) by the set oil pressure, control the plunger (11) to vibrate at a set amplitude and frequency, and control the motor to rotate at a set speed through the instructions of the host computer; The host computer interface circuit connects the controller (21) chip and the host computer (22), and is capable of transmitting the oil film thickness and temperature information processed in the control chip to the host computer (22) for display, and is capable of transmitting the parameters input in the host computer (22) to the control chip; the power supply circuit provides power supplies of different voltages to the electromagnetic switch valve (19), the pressure control valve (20), the electromagnetic vibration mechanism (17), the motor, the controller (21) and the host computer (22); and is also equipped with overvoltage and overcurrent protection functions, and automatically cuts off the power supply circuit and issues an alarm signal when the voltage or current exceeds a preset threshold.

8. A detection method using the detection device for detecting the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics as claimed in claim 1, characterized in that: The steps are: Step (1) Setting the experimental parameters: inputting the speed of the radial piston pump, the pressure of the input oil, the amplitude and frequency of the vibration required for the experiment on the panel of the host computer (22); Step (2) starting the device: opening the electromagnetic switch valve (19) to allow oil to enter the oil chamber; turning on the electric motor to cause the radial piston pump to start rotating; Step (3) Testing: Start the vibration device on the upper computer (22) panel and start recording the changes in the oil film thickness and the oil film temperature; Step (4) changing parameters: changing the motor speed, the frequency and amplitude of the vibration of the plunger (11) on the upper computer (22) panel; Step (5) Test again: Repeat step (3) and record the changes in oil film thickness and oil film temperature; Step (6) Data processing: Analyze the changes in oil film thickness and temperature under different speeds and vibrations, and draw a trend chart.

9. The method for detecting the influence of vibration of a high-pressure and large-displacement radial piston pump on oil film characteristics according to claim 8, characterized in that It is necessary to measure the vibration amplitude of a high-pressure, large-displacement radial piston pump when the speed changes from z1 to z2. A 1 becomes A 2. The frequency is determined by f 1 becomes f 2. During the process, the oil film thickness h and oil film temperature t The specific steps of the method for determining the change trend are: The first step is to set the experimental parameters: input the starting speed z1 of the radial piston pump, the oil pressure P, and the starting amplitude of the vibration in the host computer (22) A 1 and the starting frequency f 1; The second step is to start the device: in the upper computer (22), the electromagnetic switch valve (19) and the motor are respectively started to start the experimental mechanism, and after the speed of the experimental mechanism is stabilized, the electromagnetic vibration mechanism (17) is started; Step 3: Testing: The controller (21) converts the electrical signals of the eddy current sensor (23) and the temperature sensor (24) into the thickness and temperature of the oil film through an algorithm, and plots the variation trend of the thickness and temperature of the oil film over time as a graph through software, wherein the algorithm formula is as follows: as well as ; In the formula h is the oil film thickness, t is the oil film temperature; U max It is the maximum voltage value after analog-to-digital conversion; x is the voltage value corresponding to the sensor after mode conversion; h max and t max are the maximum oil film thickness and temperature that can be measured by the sensor respectively; Step 4: Change the parameters: change the speed of the motor in the host computer (22) from z1 to z2, and the amplitude of the electromagnetic vibration mechanism (17) from A 1 becomes A 2. The frequency is determined by f 1 becomes f 2; Step 5: Test again: Repeat the process in step 3 and plot the changing trend of oil film thickness and temperature during parameter changes; Step 6: Data processing: The charts drawn in steps 3 and 5 are summarized into the law of oil film thickness changing with time through software.

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