Test platform and test method for dynamic seal leakage rate measurement

Abstract

The invention relates to the field of seal measurement, and discloses a test platform for dynamic seal leakage rate measurement, which comprises a driving unit, a test unit and a measurement unit, and is characterized in that the driving unit comprises a driver and a piston push rod, the test unit comprises an environment temperature box and a sealing element assembly device, and the measurement unit comprises a high-pressure plunger pump and a low-pressure plunger pump. A pressurizing medium source is used for conveying a pressurizing medium into a sealing element device, a driver drives a piston push rod to move, the piston push rod drives a sealing element to be tested to move, and the pressurizing medium source conveys the pressurizing medium to a high-pressure plunger pump and a low-pressure plunger pump; when leakage occurs, the high-pressure plunger pump conveys a pressurizing medium to the sealing element assembling device for pressure supplementation, and the sealing element assembling device conveys a pressurizing medium to the low-pressure plunger pump for pressure relief; and after the process is finished, the high-pressure plunger pump and the low-pressure plunger pump are reset, and the volume change difference of the high-pressure plunger pump and the low-pressure plunger pump is the leakage rate. The invention further provides a test method for measuring the dynamic seal leakage rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing measurement, in particular to a test platform and test method for measuring leakage of dynamic sealing. BACKGROUND

[0002] Leakage refers to the process of cross-interface migration of fluid medium through the gap between adjacent combined surfaces driven by pressure difference or concentration gradient. This mass transport phenomenon caused by molecular thermal motion is ubiquitous in engineering systems. Statistics show that more than 80% of equipment failures in the industrial field are related to sealing failure. Sealing technology controls the leakage within the allowable threshold through material innovation and structure optimization to build a physical barrier, which is essentially a multidisciplinary collaboration of fluid dynamics, solid mechanics and material science.

[0003] However, accurately measuring the leakage of the skin bowl dynamic sealing has always been a major challenge in the industry. Traditional measurement methods have many drawbacks. In terms of visual observation, the worker observes whether the medium leaks or forms droplets, bubbles and other phenomena around the skin bowl by the naked eye to judge the leakage. But this method can only detect large leakage, and it is difficult to capture obvious signs for trace leakage, which is easy to miss. Moreover, artificial observation is greatly affected by subjective factors, and there are differences in the judgment standards of different personnel, so it is difficult to ensure the accuracy and reliability of the measurement results.

[0004] In some places with higher precision requirements, weighing method is used. Its operation mode is to weigh the collected leakage medium with a high-precision balance within a certain time interval, and then convert the weight to volume according to the density of the medium to obtain the leakage data. But the implementation process of this method is quite cumbersome, not only needs to accurately control the collection time, but also has high requirements for the sealing and cleanliness of the collection container. Once the medium volatilizes, splashes or mixes with impurities during the collection process, the measurement results will be greatly deviated.

[0005] Therefore, the existing skin bowl dynamic sealing leakage measurement method and technology have been difficult to meet the needs of the continuous development of modern industry in terms of measurement accuracy, real-time performance, operation convenience and adaptability to complex working conditions. Developing an efficient and accurate skin bowl dynamic sealing leakage measurement method and device has become a key problem to be solved. SUMMARY

[0006] The purpose of the present application is to provide a test platform and test method for measuring leakage of dynamic sealing to solve the problems existing in the related art, improve the measurement accuracy of dynamic sealing leakage, and improve the operation convenience and measurement efficiency of dynamic sealing leakage measurement.

[0007] To achieve the above purpose, the present application provides the following solutions:

[0008] The application provides a test platform for dynamic seal leakage measurement, comprising:

[0009] a driving unit, the driving unit comprising a driver and a piston push rod, the driver being in transmission connection with the piston push rod, and the driver being capable of driving the piston push rod to reciprocate linearly;

[0010] a test unit, the test unit comprising an environmental temperature box and a seal assembly device arranged in the environmental temperature box, the environmental temperature box being capable of adjusting a measurement environment temperature, a to-be-tested seal being slidably arranged in the seal assembly device, the to-be-tested seal abutting against an inner wall of the seal assembly device and separating an inner cavity of the seal assembly device into a high-pressure chamber and a low-pressure chamber, the piston push rod being connected with the to-be-tested seal, and the piston push rod being capable of driving the to-be-tested seal to reciprocate so as to change volumes of the high-pressure chamber and the low-pressure chamber;

[0011] a measurement unit, the measurement unit comprising a high-pressure plunger pump and a low-pressure plunger pump, the high-pressure plunger pump being in communication with the high-pressure chamber, the low-pressure plunger pump being in communication with the low-pressure chamber, the high-pressure plunger pump and the low-pressure plunger pump both being in communication with a pressurized medium source, and the high-pressure chamber and the low-pressure chamber both being in communication with the pressurized medium source.

[0012] Preferably, an output end of the driver is in transmission connection with the piston push rod through a transmission assembly.

[0013] The driving unit further comprises a jacket, one end of the jacket being connected with the driver, the other end of the jacket extending into the environmental temperature box, the transmission assembly being arranged in the jacket, and the piston push rod being arranged in the environmental temperature box.

[0014] Preferably, the driver is an electric motor, and a sealing element is arranged between the jacket and the environmental temperature box.

[0015] Preferably, the jacket is in a tubular structure.

[0016] Preferably, the seal assembly device is in a split structure.

[0017] Preferably, pressure sensors are arranged between the high-pressure plunger pump and the high-pressure chamber and between the low-pressure plunger pump and the low-pressure chamber.

[0018] A differential pressure sensor is arranged between the high-pressure chamber and the low-pressure chamber.

[0019] Preferably, valves are arranged between the high-pressure chamber and the pressurized medium source and between the low-pressure chamber and the pressurized medium source.

[0020] Preferably, the measuring unit further comprises a thermostat, and the pressurized medium source is arranged in the thermostat, and the thermostat is capable of adjusting the temperature of the pressurized medium of the pressurized medium source.

[0021] The thermostat is a constant-temperature water bath.

[0022] Preferably, the high-pressure plunger pump and the low-pressure plunger pump both have a volume scale.

[0023] The application further provides a test method for dynamic seal leakage measurement, which utilizes the test platform for dynamic seal leakage measurement, and comprises the following steps:

[0024] The pressurized medium source is utilized to deliver pressurized medium into the seal assembly device, the pressure difference between the high-pressure chamber and the low-pressure chamber is monitored, and the environmental temperature box adjusts the temperature to make the temperature of the seal assembly device reach the measurement temperature.

[0025] The driver drives the piston push rod to move, the piston push rod drives the to-be-tested seal to move, and the pressure medium source delivers pressurized medium to the high-pressure plunger pump and the low-pressure plunger pump.

[0026] When the to-be-tested seal leaks, the high-pressure plunger pump delivers pressurized medium to the seal assembly device to supplement the pressure, and the seal assembly device delivers pressurized medium to the low-pressure plunger pump to release the pressure.

[0027] After the test is completed, the high-pressure plunger pump and the low-pressure plunger pump are reset, and the volume change difference of the high-pressure plunger pump and the low-pressure plunger pump is the leakage amount of the to-be-tested seal during the test.

[0028] The application has the following technical effects relative to the related art: the test platform for dynamic seal leakage measurement comprises a driving unit, a test unit and a measuring unit, the driving unit comprises a driver and a piston push rod, the driver is in transmission connection with the piston push rod, and the driver is capable of driving the piston push rod to move linearly back and forth; the test unit comprises an environmental temperature box and a seal assembly device arranged in the environmental temperature box, the environmental temperature box is capable of adjusting the measurement environmental temperature, a to-be-tested seal is slidably arranged in the seal assembly device, the to-be-tested seal abuts against the inner wall of the seal assembly device, and the inner cavity of the seal assembly device is divided into a high-pressure chamber and a low-pressure chamber; the piston push rod is connected with the to-be-tested seal, and the piston push rod is capable of driving the to-be-tested seal to move back and forth to change the volumes of the high-pressure chamber and the low-pressure chamber; the measuring unit comprises a high-pressure plunger pump and a low-pressure plunger pump, the high-pressure plunger pump is in communication with the high-pressure chamber, the low-pressure plunger pump is in communication with the low-pressure chamber, the high-pressure plunger pump and the low-pressure plunger pump are both in communication with a pressurized medium source, and the high-pressure chamber and the low-pressure chamber are both in communication with the pressurized medium source.

[0029] The test platform for dynamic seal leakage measurement of the present application, when measuring the seal to be measured, uses a pressurized medium source to deliver pressurized medium to the seal device, monitors the pressure difference between the high-pressure chamber and the low-pressure chamber, and the environmental temperature box adjusts the temperature to make the temperature of the seal assembly device reach the measurement temperature; the driver drives the piston push rod to move, the piston push rod drives the seal to be measured to move, and the pressure medium source delivers pressurized medium to the high-pressure plunger pump and the low-pressure plunger pump; when the seal to be measured leaks, the high-pressure plunger pump delivers pressurized medium to the seal assembly device for pressure compensation, and the seal assembly device delivers pressurized medium to the low-pressure plunger pump for pressure relief; after the test is completed, the high-pressure plunger pump and the low-pressure plunger pump are reset, and the volume difference of the high-pressure plunger pump and the low-pressure plunger pump is the leakage volume during the test of the seal to be measured.

[0030] The test platform for dynamic seal leakage measurement of the present application, the seal assembly device is arranged in the environmental temperature box to control the test temperature, better simulating the working environment of the seal to be measured, the measurement unit can provide a stable pressure difference environment, and the plunger pump structure is used to monitor the leakage volume, avoiding manual observation errors and improving the dynamic seal leakage measurement precision; and the test platform for dynamic seal leakage measurement of the present application is convenient to operate, and is beneficial to improving the test work efficiency of dynamic seal leakage measurement.

[0031] At the same time, the present application also provides a test method for dynamic seal leakage measurement, which uses the above-mentioned test platform for dynamic seal leakage measurement, and naturally, the test method for dynamic seal leakage measurement of the present application can also achieve the above-mentioned beneficial effects. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments or the related art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0033] Figure 1 The structural schematic diagram of the test platform for dynamic seal leakage measurement disclosed by the embodiments of the present application.

[0034] In the figure: 1, driver; 2, piston push rod; 3, environmental temperature box; 4, seal assembly device; 5, high-pressure plunger pump; 6, low-pressure plunger pump; 7, jacket; 8, pressure sensor; 9, differential pressure sensor; 10, valve; 11, constant-temperature water bath. DETAILED DESCRIPTION

[0035] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0036] The present application aims to provide a test platform and a test method for dynamic seal leakage measurement, to solve the problems in the related art, improve the dynamic seal leakage measurement accuracy, and improve the dynamic seal leakage measurement operation convenience and measurement efficiency.

[0037] To make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Embodiment one

[0039] The present embodiment provides a test platform for dynamic seal leakage measurement, please refer to Figure 1 , comprising a driving unit, a test unit and a measurement unit, wherein the driving unit comprises a driver 1 and a piston push rod 2, the driver 1 is in transmission connection with the piston push rod 2, and the driver 1 can drive the piston push rod 2 to move linearly back and forth; the test unit comprises an environmental temperature box 3 and a seal assembly device 4 arranged in the environmental temperature box 3, the environmental temperature box 3 can adjust the measurement environment temperature, the to-be-measured seal is slidably arranged in the seal assembly device 4, the to-be-measured seal abuts against the inner wall of the seal assembly device 4, and the inner cavity of the seal assembly device 4 is divided into a high-pressure chamber and a low-pressure chamber; the piston push rod 2 is connected with the to-be-measured seal, and the piston push rod 2 can drive the to-be-measured seal to move back and forth to change the volume of the high-pressure chamber and the low-pressure chamber; the measurement unit comprises a high-pressure plunger pump 5 and a low-pressure plunger pump 6, the high-pressure plunger pump 5 is in communication with the high-pressure chamber, the low-pressure plunger pump 6 is in communication with the low-pressure chamber, the high-pressure plunger pump 5 and the low-pressure plunger pump 6 are both in communication with a pressurized medium source, and the high-pressure chamber and the low-pressure chamber are both in communication with the pressurized medium source.

[0040] The test platform for dynamic seal leakage measurement of the application, when measuring the seal to be measured, uses a pressurized medium source to deliver pressurized medium to the seal device, monitors the pressure difference between the high-pressure chamber and the low-pressure chamber, the environmental temperature box 3 adjusts the temperature to make the temperature of the seal assembly device 4 reach the measurement temperature; the driver 1 drives the piston push rod 2 to move, the piston push rod 2 drives the seal to be measured to move, the pressure medium source delivers pressurized medium to the high-pressure plunger pump 5 and the low-pressure plunger pump 6; when the seal to be measured leaks, the high-pressure plunger pump 5 delivers pressurized medium to the seal assembly device 4 for pressure compensation, and the seal assembly device 4 delivers pressurized medium to the low-pressure plunger pump 6 for pressure relief; after the test is completed, the high-pressure plunger pump 5 and the low-pressure plunger pump 6 are reset, and the volume difference of the high-pressure plunger pump 5 and the low-pressure plunger pump 6 is the leakage volume of the seal to be measured during the test.

[0041] The test platform for dynamic seal leakage measurement of the application, the seal assembly device 4 is arranged in the environmental temperature box 3 to control the test temperature, better simulating the working environment of the seal to be measured, the measurement unit can provide a stable pressure difference environment, and the plunger pump structure is used to monitor the leakage volume, avoiding manual observation errors and improving the dynamic seal leakage measurement accuracy.

[0042] In the specific embodiment, the output end of the driver 1 is connected with the piston push rod 2 through a transmission assembly, so that the driver 1 can drive the piston push rod 2 to move linearly. The driving unit further comprises a jacket 7, one end of the jacket 7 is connected with the driver 1, the other end of the jacket 7 extends into the environmental temperature box 3, the transmission assembly is arranged in the jacket 7, and the piston push rod 2 is arranged in the environmental temperature box 3. The jacket 7 is arranged in the driving unit, and the transmission assembly is arranged in the jacket 7, so that the power transmission is ensured and the normal work of the environmental temperature box 3 is avoided.

[0043] In actual application, the driver 1 can be a motor, the transmission assembly can be a gear and rack transmission mechanism, a cam follower transmission mechanism or other transmission mechanisms, so as to convert the rotary motion of the driver 1 into linear reciprocating motion, smoothly drive the piston push rod 2 to move reciprocally, and ensure the working reliability of the test platform. A sealing element is arranged between the jacket 7 and the environmental temperature box 3, so as to reduce the heat exchange between the environmental temperature box 3 and the external environment, ensure the measurement environment temperature, and further improve the measurement result accuracy.

[0044] In the specific embodiment, the jacket 7 is a tubular structure, which can accommodate the transmission assembly and is connected with the driver 1 and the environmental temperature box 3.

[0045] It should be noted that in practical applications, the sealing assembly device 4 can be provided in a split structure to facilitate the installation and operation of the sealing assembly to be tested, and to facilitate the replacement of the sealing assembly to be tested, thereby meeting various measurement requirements and improving the adaptability of the test platform.

[0046] Specifically, a pressure sensor 8 is arranged between the high-pressure plunger pump 5 and the high-pressure chamber and between the low-pressure plunger pump 6 and the low-pressure chamber to monitor the pressure on both sides of the sealing assembly to be tested. In practical applications, in order to facilitate connection, the high-pressure plunger pump 5 is connected to the high-pressure chamber and the pressurizing medium source through a pipeline, and the pressure sensor 8 is arranged on the pipeline between the high-pressure plunger pump 5 and the high-pressure chamber. Similarly, the low-pressure plunger pump 6 is connected to the low-pressure chamber and the pressurizing medium source through a pipeline, and the pressure sensor 8 is arranged on the pipeline between the low-pressure plunger pump 6 and the low-pressure chamber.

[0047] A differential pressure sensor 9 is arranged between the high-pressure chamber and the low-pressure chamber to monitor the pressure difference between the high-pressure chamber and the low-pressure chamber, thereby providing convenience for the test personnel to monitor the test conditions in real time and improving the operation convenience of the test platform.

[0048] More specifically, a valve 10 is arranged between the high-pressure chamber and the pressurizing medium source and between the low-pressure chamber and the pressurizing medium source to facilitate the control of the connection state between the high-pressure chamber and the low-pressure chamber and the pressurizing medium source, thereby ensuring the operation convenience of the measurement test.

[0049] Further, the measurement unit further comprises a thermostat, and the pressurizing medium source is arranged in the thermostat, and the thermostat can adjust the temperature of the pressurizing medium of the pressurizing medium source. The thermostat can adjust the temperature of the pressurizing medium, so that the pressurizing medium entering the high-pressure chamber and the low-pressure chamber matches the temperature in the environmental temperature chamber 3, thereby avoiding the influence of temperature instability on the measurement accuracy.

[0050] In the specific embodiment, the pressurizing medium is kerosene, and the thermostat is a constant-temperature water bath 11. The constant-temperature water bath 11 is used to heat and adjust the temperature of the pressurizing medium, thereby further improving the measurement accuracy of the test platform. In other specific embodiments that can be implemented in the present application, the pressurizing medium can also be adjusted according to the test conditions to meet different measurement requirements.

[0051] Further, the high-pressure plunger pump 5 and the low-pressure plunger pump 6 each have a volume scale to facilitate the test personnel to more intuitively monitor the volume change of the pressurizing medium in the high-pressure plunger pump 5 and the low-pressure plunger pump 6, thereby measuring the leakage of the sealing assembly during the test, avoiding the conversion error of the measurement method in the prior art, ensuring the measurement accuracy of the test platform, and improving the operation convenience of the test platform.

[0052] The test platform for dynamic seal leakage measurement of the application, the driving unit can drive the reciprocating motion of the seal to be measured in the seal assembly device 4, the test unit provides a sealing test environment for the seal to be measured, the environment temperature box 3 is arranged to facilitate the measurement of the sealing characteristics of the seal under different temperature environments, and the pressurizing unit can provide a stable pressure difference environment and accurately measure the leakage volume of the seal to be measured.

[0053] The test platform for dynamic seal leakage measurement of the application not only solves the technical bottlenecks of the existing dynamic seal leakage measurement test platform in terms of measurement accuracy, real-time performance, operation convenience and complex working condition adaptability, but also significantly improves the measurement stability and reliability under extreme temperature, variable load and other complex working conditions through precise simulation of multi-field coupling effect, and effectively covers the sealing performance test requirements of high-end fields such as aerospace and energy equipment.

[0054] Embodiment two

[0055] The embodiment provides a test method for dynamic seal leakage measurement, which utilizes the test platform for dynamic seal leakage measurement of embodiment one, and comprises the following steps:

[0056] The pressurizing medium source is utilized to deliver pressurizing medium into the seal device, the pressure difference between the high-pressure chamber and the low-pressure chamber is monitored, and the temperature of the environment temperature box 3 is adjusted to make the temperature of the seal assembly device 4 reach the measurement temperature;

[0057] The driver 1 drives the piston push rod 2 to move, the piston push rod 2 drives the seal to be measured to move, and the pressure medium source delivers pressurizing medium to the high-pressure plunger pump 5 and the low-pressure plunger pump 6;

[0058] When the seal to be measured leaks, the high-pressure plunger pump 5 delivers pressurizing medium to the seal assembly device 4 for pressure compensation, and the seal assembly device 4 delivers pressurizing medium to the low-pressure plunger pump 6 for pressure relief;

[0059] After the test is completed, the high-pressure plunger pump 5 and the low-pressure plunger pump 6 are reset, and the volume change difference of the high-pressure plunger pump 5 and the low-pressure plunger pump 6 is the leakage amount during the test of the seal to be measured.

[0060] The test method for dynamic seal leakage measurement provided by the application measures the volume change difference of the pressurized medium in the plunger pump, and can accurately measure the leakage of the seal under test during the test by monitoring the volume change difference of the pressurized medium in the high-pressure plunger pump 5 and the low-pressure plunger pump 6 before and after the test, and reduces the six pain points of the traditional method, i.e., conversion error, environmental interference, medium dependence, system cost, and human bias, and is especially suitable for dynamic seal performance testing of high pressure, high temperature, and trace leakage.

[0061] Embodiment three

[0062] The embodiment provides a test method for dynamic seal leakage measurement, which utilizes the test platform for dynamic seal leakage measurement in embodiment one and comprises the following steps:

[0063] Before the test starts, the valves 10 between the high-pressure chamber and the low-pressure chamber and the pressurized medium source are opened, so that the kerosene medium in the constant-temperature water bath box 11 enters the seal assembly device 4 to form the high and low pressures on both sides of the seal under test required by the test, the pressure difference sensor 9 monitors the pressure difference between the high-pressure chamber and the low-pressure chamber in the seal assembly device 4, the valves 10 between the high-pressure chamber and the pressurized medium source and the valves 10 between the low-pressure chamber and the pressurized medium source are closed after the required pressure difference is reached, and the seal assembly device 4 is heated by the environmental temperature box 3. In the test starting stage, the driver 1 drives the piston push rod 2 to move, so that the piston push rod 2 drives the seal under test to move back and forth at a constant speed. The kerosene medium in the constant-temperature water bath box 11 is preheated and delivered to the high-pressure plunger pump 5 and the low-pressure plunger pump 6.

[0064] When the seal under test leaks, the high-pressure plunger pump 5 performs plunger kerosene pressure compensation to the seal assembly device 4, and the seal assembly device 4 performs kerosene pressure relief to the low-pressure plunger pump 6.

[0065] After the test is completed, the high-pressure plunger pump 5 and the low-pressure plunger pump 6 are adjusted to the initial state of the test according to the pressure sensor 8. At this time, the volume change difference of the pressurized medium in the high-pressure plunger pump 5 and the low-pressure plunger pump 6 before and after the test is the leakage of the seal during the test.

[0066] The principles and implementation manners of the application are described by using specific examples in the application, and the above embodiment descriptions are only used to help understand the method and core idea of the application; meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the application. In conclusion, the content of the specification should not be understood as a limitation of the application.

Claims

1. A test platform for measuring the leakage of dynamic seals, characterized in that, include: The drive unit includes a driver and a piston rod, the driver being throttle-connected to the piston rod, and the driver being able to drive the piston rod to reciprocate linear motion; The test unit includes an ambient temperature chamber and a sealing component assembly device disposed within the ambient temperature chamber. The ambient temperature chamber is adjustable to measure the ambient temperature. The sealing component to be tested is slidably disposed within the sealing component assembly device, and the sealing component to be tested abuts against the inner wall of the sealing component assembly device, dividing the inner cavity of the sealing component assembly device into a high-pressure chamber and a low-pressure chamber. A piston push rod is connected to the sealing component to be tested, and the piston push rod can drive the sealing component to be tested to reciprocate, thereby changing the volume of the high-pressure chamber and the low-pressure chamber. The measuring unit includes a high-pressure plunger pump and a low-pressure plunger pump. The high-pressure plunger pump is connected to the high-pressure chamber, and the low-pressure plunger pump is connected to the low-pressure chamber. Both the high-pressure plunger pump and the low-pressure plunger pump are connected to a pressurizing medium source, and both the high-pressure chamber and the low-pressure chamber are connected to the pressurizing medium source.

2. The test platform for measuring dynamic seal leakage according to claim 1, characterized in that: The output end of the driver is connected to the piston push rod via a transmission assembly. The drive unit also includes a jacket, one end of which is connected to the driver, and the other end of which extends into the ambient temperature chamber. The transmission assembly is disposed within the jacket, and the piston push rod is disposed within the ambient temperature chamber.

3. The test platform for measuring dynamic seal leakage according to claim 2, characterized in that: The driver is a motor; a sealing element is provided between the jacket and the ambient temperature chamber.

4. The test platform for measuring dynamic seal leakage according to claim 2, characterized in that: The jacket is a tubular structure.

5. The test platform for measuring dynamic seal leakage according to claim 1, characterized in that: The sealing assembly device is a split-type structure.

6. The test platform for measuring dynamic seal leakage according to claim 1, characterized in that: Pressure sensors are installed between the high-pressure plunger pump and the high-pressure chamber, and between the low-pressure plunger pump and the low-pressure chamber; A differential pressure sensor is installed between the high-pressure chamber and the low-pressure chamber.

7. The test platform for measuring dynamic seal leakage according to claim 1, characterized in that: Valves are installed between the high-pressure chamber and the pressurizing medium source, and between the low-pressure chamber and the pressurizing medium source.

8. The test platform for measuring dynamic seal leakage according to claim 1, characterized in that: The measuring unit also includes a constant temperature chamber, and the pressurizing medium source is disposed inside the constant temperature chamber. The constant temperature chamber can adjust the temperature of the pressurizing medium source. The constant temperature chamber is a constant temperature water bath chamber.

9. The test platform for measuring dynamic seal leakage according to any one of claims 1-8, characterized in that: Both the high-pressure plunger pump and the low-pressure plunger pump have volume scales.

10. A test method for measuring the leakage of dynamic seals, characterized in that, The test platform for measuring dynamic seal leakage according to any one of claims 1-9 includes the following steps: The pressurizing medium source is used to deliver pressurizing medium into the sealing device, the pressure difference between the high-pressure chamber and the low-pressure chamber is monitored, and the ambient temperature chamber is used to adjust the temperature so that the temperature of the sealing assembly device reaches the measurement temperature. The driver drives the piston push rod to move, the piston push rod drives the seal to be tested to move, and the pressure medium source delivers pressurized medium to the high-pressure plunger pump and the low-pressure plunger pump; When the seal under test leaks, the high-pressure plunger pump delivers pressurizing medium to the seal assembly device to replenish the pressure, and the seal assembly device delivers pressurizing medium to the low-pressure plunger pump to release the pressure. After the test, the high-pressure plunger pump and the low-pressure plunger pump are reset. The difference in volume change between the high-pressure plunger pump and the low-pressure plunger pump is the leakage amount of the seal under test during the test.

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