High-pressure and high-speed hydraulic sealing test device

Abstract

The invention discloses a high-pressure high-speed hydraulic sealing test device, and belongs to the technical field of hydraulic sealing test. The test platform comprises a driving motor, a diaphragm coupling, a hydraulic sealing test section, a sealing water inlet pipeline, a pressure water inlet pipeline, a sealing water return pipeline and the like, a closed water circulation loop is formed, and the stable regulation and control of the sealing performance can be realized. The platform design has the characteristics of high power (up to 110 kW), high pressure (up to 1.5 MPa) and high rotating speed (up to 3500 rev / min). The platform adopts an integrated design concept, the assembly precision and stability of the device are improved, the pressure boundary condition is monitored and adjusted in real time through the cooperation of the pressure sensor, the pressure supply pump and the electric control valve, and the flowing stability of each pipeline in the test process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to a platform and test method suitable for performance testing of high-pressure and high-speed hydraulic sealing devices, in particular to a device for testing the sealing performance of hydraulic sealing devices in the field of large-scale hydraulic equipment, which belongs to the technical field of hydraulic sealing testing. BACKGROUND

[0002] With the increasing demand for sealing performance of industrial equipment, the requirement for sealing performance is also increasing, and the traditional hydraulic sealing device gradually shows some limitations. In high temperature, high pressure or corrosive medium working conditions, ordinary hydraulic sealing device may not provide sufficient sealing effect, leading to increased risk of leakage and equipment failure. In addition, high maintenance frequency, short service life and other problems also limit its application in some key fields.

[0003] In this context, the spiral hydraulic sealing device emerged as the times require and became a more advanced choice. The spiral hydraulic sealing device combines the advantages of spiral structure on the basis of traditional hydraulic sealing, greatly improving its sealing performance and adaptability. This design makes the contact between the sealing surfaces more closely, significantly improving the sealing effect, especially in high pressure environment, its performance is particularly outstanding. In traditional hydraulic sealing device, the sealing effect is often affected by temperature fluctuations and pressure changes. The hydraulic spiral sealing device can automatically adapt to these changes due to its unique structure, ensuring reliable sealing under various operating conditions. This superior adaptability not only reduces the maintenance requirements of the equipment, but also prolongs the service life and reduces the operating cost, meeting the requirements of modern industry for sustainable development. Therefore, the hydraulic spiral sealing device is increasingly widely used in modern industry, becoming an important direction of sealing technology development. SUMMARY

[0004] The purpose of the present application is to study the operating mechanism of hydraulic sealing and the state of different operating conditions, to provide a theoretical basis for the design and research of hydraulic sealing, to verify the deviation range between theory and practice, and to verify it through experiments. In order to make up for the lack of mechanism test bench for the study of hydraulic sealing characteristics, the present application designs and builds a water circulation test bench for testing the characteristics of hydraulic sealing, and based on measuring instruments, finally realizes the acquisition and verification of key data.

[0005] The purpose of the present application can be realized by the following technical solutions:

[0006] The high-pressure and high-speed hydraulic sealing test device is driven by a driving motor through a diaphragm coupling to drive a spiral hydraulic sealing test section, and is fixed on a cast iron platform; the hydraulic sealing test section includes a hydraulic sealing shaft, a hydraulic sealing sleeve, a hydraulic sealing cavity and a cylinder body nested from inside to outside;

[0007] The water sealing test section and the pressure water inlet pipeline, the sealing water inlet pipeline, the first sealing water return pipeline, the second sealing water return pipeline and the water tank form a closed water circulation loop.

[0008] The sealing water inlet pipeline and the pressure water inlet pipeline realize stable and adjustable pressure inlet conditions by cooperating with the pressure sensor, the check valve and the vertical pressure supply pump.

[0009] The first sealing water return pipeline and the second sealing water return pipeline realize stable and adjustable pressure outlet conditions by cooperating with the pressure sensor, the butterfly valve and the electric regulating valve.

[0010] Further, the sealing water inlet pipeline is sequentially provided with the water inlet pipe interface corrugated pipe, the water inlet pipe check valve, the water inlet pipe flow sensor, the water inlet pipe pressure sensor, the water inlet pipe steady flow straight pipe section, the water inlet pipe vertical pressure supply pump, the water inlet pipe corrugated pipe and the water inlet pipe butterfly valve from the water sealing test section to the water tank.

[0011] Further, the pressure water inlet pipeline comprises the pressure pipe vertical pressure supply pump, the pressure pipe steady flow straight pipe section, the pressure pipe pressure sensor, the pressure pipe check valve and the pressure pipe interface corrugated pipe which are sequentially arranged.

[0012] Further, the first sealing water return pipeline is sequentially provided with the first return pipe interface corrugated pipe, the first return pipe flow sensor, the first return pipe valve front steady flow straight pipe section, the first return pipe electric regulating valve, the first return pipe pressure sensor, the first return pipe valve rear steady flow straight pipe section and the first return pipe butterfly valve from the water sealing test section to the water tank.

[0013] The second sealing water return pipeline is sequentially provided with the second return pipe interface corrugated pipe, the second return pipe flow sensor, the second return pipe valve front steady flow straight pipe section, the second return pipe electric regulating valve, the second return pipe pressure sensor, the second return pipe valve rear steady flow straight pipe section and the second return pipe butterfly valve from the water sealing test section to the water tank.

[0014] Further, four threaded interfaces are arranged on the barrel, which are sealing water inlet, pressure water inlet, first sealing water return outlet and second sealing water return outlet respectively; the sealing water inlet pipe is connected with the sealing water inlet through the inlet pipe interface bellows, the pressure water inlet pipe is connected with the pressure water inlet through the pressure pipe interface bellows, the first sealing water return pipe is connected with the first sealing water return outlet through the first return pipe interface bellows, and the second sealing water return pipe is connected with the second sealing water return outlet through the second return pipe interface bellows.

[0015] Further, the hydraulic sealing test section is designed in an integrated manner, and a bearing seat is arranged on the side of the driving motor, which is connected with the barrel to form a closed whole; the bearing seat acts on the hydraulic sealing shaft on which a tapered roller bearing is installed.

[0016] Further, the deep groove ball bearing is arranged on the hydraulic sealing shaft acting on the barrel.

[0017] Further, the components in the pressure water inlet pipe, the sealing water inlet pipe, the first sealing water return pipe and the second sealing water return pipe are all connected by flanges, and the distance from the flow sensor to the connecting flange is more than 6 times the diameter of the corresponding pipe.

[0018] Further, the sealing performance of the hydraulic sealing shaft with a diameter of 230 mm is tested, and the driving motor power can reach 110 kw, the pressure boundary condition can reach 1.5 MPa, and the rotating speed can reach 3500 rev / min under the limit working condition.

[0019] The test method of the high-pressure and high-speed hydraulic sealing test device comprises the following steps:

[0020] S1, before the test, the driving motor is debugged, and then water is injected into the water tank through the water pipe, and after the water level reaches the set height, the power is turned on;

[0021] S2, the air inside the vertical pressure supply pump is discharged through the exhaust hole, and the rotating speed of the pump is started and adjusted through the frequency converter; the air discharge condition in the test pipe is judged by observing the bubble flow through the hydraulic sealing test section; when the bubble discharge in the hydraulic sealing test section is completed, the vertical pressure supply pump of the inlet pipe is closed, and when the water level of the water tank is higher than the water level line of the water tank, the water source is closed;

[0022] S3, the data acquisition line is connected, the pressure, flow and temperature sensors are debugged, and it is ensured that they are in the normal initial state;

[0023] S4, during the test, the test target pressure parameters are set for the vertical pressure supply pump and the electric regulating valve, the vertical pressure supply pump is started, and whether the current pressure reaches and stabilizes at the expected value is judged in combination with the external data acquisition pressure sensor and the built-in sensor parameter state of the vertical pressure supply pump and the electric regulating valve;

[0024] S5, adjust the back pressure of the outlet pipeline by adjusting the manual valve of the water tank, observe the pressure sensor value while adjusting the opening of the manual valve, and adjust the opening of the electric regulating valve to 75% to ensure that the electric regulating valve automatically adjusts the opening to meet the back pressure requirement during the experiment;

[0025] S6, start the drive motor after judging that the test start condition is met, increase the speed to the target speed value, observe the panel value of the data acquisition system, and start synchronous acquisition after the pressure, flow and other values are stable; repeat the above steps until all corresponding tests are completed;

[0026] S7, when a single test is completed, turn off the drive motor and the vertical pressure supply pump, and drain the water in the test circuit through the water tank bottom drain valve.

[0027] The beneficial effects of the present application are: the test platform includes a drive motor, a diaphragm coupling, a hydraulic seal test section, a sealing water inlet pipeline, a pressure water inlet pipeline, a sealing water return pipeline and other components, which form a closed water circulation loop and can realize stable regulation and control of the sealing performance. The platform design has the characteristics of high power (up to 110kW), high pressure (up to 1.5MPa) and high speed (up to 3500rev / min). The innovation of the present application is that the integrated design concept is adopted, which improves the assembly precision and stability of the device, and realizes real-time monitoring and adjustment of the pressure boundary condition through the cooperation of the pressure sensor, the pressure supply pump and the electric regulating valve, which ensures the stability of the flow in each pipeline during the test. The research and development of the device will provide important support for the progress and application of hydraulic sealing technology, and contribute to the sustainable development of modern industry. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the high-pressure and high-speed hydraulic seal test device of the present application;

[0029] Figure 2 is a structural schematic diagram of the core hydraulic seal test section of the present application;

[0030] Figure 3 is a side view of the core hydraulic seal test section cylinder of the present application;

[0031] Figure 4 is a structural schematic diagram of the sealing water inlet pipe of the present application;

[0032] Figure 5 is a structural schematic diagram of the first sealing water return pipeline of the present application;

[0033] Figure 6 is a structural schematic diagram of the second sealing water return pipeline of the present application.

[0034] In the figure: 1, drive motor, 2, diaphragm coupling, 3, water seal test section, 3a, bearing seat, 3b, water seal shaft, 3c, water seal sleeve, 3d, water seal cavity, 3e, cylinder, 3f, foot, 3e-1, sealing water inlet, 3e-2, pressure water inlet, 3e-3, first sealing water return, 3e-4, second sealing water return, 3g, tapered roller bearing, 3h, bearing skeleton oil seal, 3i, cylinder skeleton oil seal, 3j, deep groove ball bearing, 4, sealing water inlet pipeline, 4a, water inlet pipe butterfly valve, 4b, water inlet pipe corrugated pipe, 4c, water inlet pipe vertical pressure supply pump, 4c-1, water inlet pipe pressure sensor, 4d, water inlet pipe steady flow straight pipe section, 4e, water inlet pipe flow sensor, 4f, water inlet pipe check valve, 4g, water inlet pipe interface corrugated pipe, 5, pressure water inlet pipeline, 5a, pressure pipe vertical pressure supply pump, 5a-1, pressure pipe pressure sensor, 5b, pressure pipe steady flow straight pipe section, 5c, pressure pipe check valve, 5d, pressure pipe interface corrugated pipe, 6, first sealing water return pipeline, 6a, first return pipe interface corrugated pipe, 6b, first return pipe flow sensor, 6c, first return pipe valve front steady flow straight pipe section, 6d, first return pipe electric regulating valve, 6d-1, first return pipe pressure sensor, 6e, first return pipe valve rear steady flow straight pipe section, 6f, first return pipe butterfly valve, 7, second sealing water return pipeline, 7a, second return pipe interface corrugated pipe, 7b, second return pipe flow sensor, 7c, second return pipe valve front steady flow straight pipe section, 7d, second return pipe electric regulating valve, 7d-1, second return pipe valve rear pressure second return pipe sensor, 7e, second return pipe steady flow straight pipe section, 7f, second return pipe butterfly valve, 8, water tank, 9, cast iron platform. DETAILED DESCRIPTION

[0035] The high-pressure high-speed water seal test device of the present application will be described in detail below in combination with the drawings and specific embodiments.

[0036] The high-pressure high-speed water seal test device comprises a drive motor 1, a diaphragm coupling 2, a water seal test section 3, a sealing water inlet pipeline 4, a pressure water inlet pipeline 5, a first sealing water return pipeline 6, a second sealing water return pipeline 7, a water tank 8, and a cast iron platform 9.

[0037] The drive motor 1 is connected to the water seal test section 3 through the coupling 2 and is fixed on the cast iron platform 9. The water seal test section 3 is connected to the sealing water inlet pipeline 4, the pressure water inlet pipeline 5, the first sealing water return pipeline 6, and the second sealing water return pipeline 7 in sequence. The sealing water inlet pipeline 4, the first sealing water return pipeline 6, and the second sealing water return pipeline 7 are connected to the water tank through national standard flanges, and all pipelines are supported by fixed supports.

[0038] The hydraulic seal test section 3 comprises a bearing seat 3a, a hydraulic seal shaft 3b, a hydraulic seal sleeve 3c, a hydraulic seal cavity 3d, a cylinder body 3e, and a foot 3f. The bearing seat 3a is provided with a tapered roller bearing 3g and a bearing skeleton seal 3h. The cylinder body 3e is provided with four threaded interfaces, namely a sealing water inlet 3e-1, a pressure water inlet 3e-2, a first sealing water return outlet 3e-3, and a second sealing water return outlet 3e-4. The hydraulic seal shaft 3b is connected to the shaft of the driving motor through a diaphragm coupling 2 to provide power for the rotation of the hydraulic seal shaft 3b.

[0039] The hydraulic seal test section 3 is connected to the sealing water inlet pipe 4 through the sealing water inlet 3e-1 and the corrugated pipe 4g, to the sealing water return pipe 6 through the first sealing water return outlet 3e-3 and the corrugated pipe 6a, and to the sealing water return pipe 7 through the first sealing water return outlet 3e-4 and the corrugated pipe 7a.

[0040] The sealing water inlet pipe 4 is connected to the water tank 8 through a flange. In the flow direction of the water flow, the sealing water inlet pipe 4 is sequentially provided with an inlet pipe butterfly valve 4a, an inlet pipe corrugated pipe 4b, an inlet pipe vertical pressure supply pump 4c, an inlet pipe steady flow straight pipe section 4d, an inlet pipe flow sensor 4e, an inlet pipe check valve 4f, and an inlet pipe interface corrugated pipe 4g. The inlet pipe steady flow straight pipe section 4d is provided with an inlet pipe pressure sensor 4c-1 connected to the inlet pipe vertical pressure supply pump 4c. The inlet pipe interface corrugated pipe 4g connected to the hydraulic seal test section 3 is bendable and can absorb part of the vibration. Except for the connection between the inlet pipe interface corrugated pipe 4g and the hydraulic seal test section 3, which is a pipe thread connection, the remaining connections of the sealing water inlet pipe 4 are all flange connections.

[0041] The pressure water inlet pipe 5 obtains water source from the water tank 8 through a water pipe. In the flow direction of the water flow, the pressure water inlet pipe 5 is sequentially provided with a pressure pipe vertical pressure supply pump 5a, a pressure pipe steady flow straight pipe section 5b, a pressure pipe check valve 5c, and a pressure pipe interface corrugated pipe 5d. The pressure pipe steady flow straight pipe section 5b is provided with a pressure pipe pressure sensor 5a-1 connected to the pressure pipe vertical pressure supply pump 5a. The pressure pipe interface corrugated pipe 5d connected to the hydraulic seal test section 3 is bendable and can absorb part of the vibration. Except for the connection between the pressure pipe interface corrugated pipe 5e and the hydraulic seal test section 3, which is a pipe thread connection, the remaining connections of the sealing water inlet pipe 5 are all flange connections.

[0042] The first sealing water return pipeline 6 is connected with the water sealing test section 3 through pipe threads, and is sequentially provided with a first return pipe interface bellows 6a, a first return pipe flow sensor 6b, a first return pipe valve front steady flow straight pipe section 6c, a first return pipe electric regulating valve 6d, a first return pipe valve rear steady flow straight pipe section 6e and a first return pipe butterfly valve 6f in the flow direction of the water flow, wherein the first return pipe butterfly valve 6f is connected with the water tank through a flange, the first return pipe steady flow straight pipe section 6e is provided with a first return pipe pressure sensor 6d-1 connected with the first return pipe electric regulating valve 6d, and the first sealing water return pipeline 6 is connected with the water sealing test section 3 through pipe threads except that the rest are connected through flanges.

[0043] The second sealing water return pipeline 7 is connected with the water sealing test section 3 through pipe threads, and is sequentially provided with a second return pipe interface bellows 7a, a second return pipe flow sensor 7b, a second return pipe valve front steady flow straight pipe section 7c, a second return pipe electric regulating valve 7d, a second return pipe valve rear steady flow straight pipe section 7e and a second return pipe butterfly valve 7f in the flow direction of the water flow, wherein the second return pipe butterfly valve 7f is connected with the water tank through a flange, the second return pipe valve rear steady flow straight pipe section 7e is provided with a pressure sensor 7d-1 connected with the second return pipe electric regulating valve 7d, and the second sealing water return pipeline 7 is connected with the water sealing test section 3 through pipe threads except that the rest are connected through flanges.

[0044] The water sealing test section 3 adopts an integrated design concept, and is provided with a bearing seat 3a on the side of the driving motor 1, and is connected with a cylinder to form a closed whole, which provides support for the water sealing shaft and balances the axial force of the water sealing shaft by installing a tapered roller bearing; in addition, the integrated design makes the water sealing test section 3 have higher assembly precision and be more stable.

[0045] The water sealing test section 3, the sealing water inlet pipeline 4, the pressure water inlet pipeline 5, the first sealing water return pipeline 6, the second sealing water return pipeline 7 and the water tank 8 form a closed water circulation loop, all the water flows back to the water tank through the pipeline and the water sealing test device after being output from the water tank, and this design scheme is convenient for stable regulation and control of the flow of each pipeline during the test.

[0046] The sealing water inlet pipeline 4 and the pressure water inlet pipeline 5 realize stable and adjustable pressure inlet conditions by cooperating with a pressure sensor, a check valve and a pressure supply pump, the pressure sensor collects the pressure signal of the outlet of the pressure supply pump in real time and feeds back to the pressure supply pump, and the pressure supply pump is adjusted to be stable at the preset target inlet pressure value by adjusting the rotating speed.

[0047] The first sealing water return pipeline 6 and the second sealing water return pipeline 7 realize stable and adjustable pressure outlet conditions by cooperating with a pressure sensor, a butterfly valve and an electric regulating valve. The pressure sensor collects the electric regulating valve outlet pressure signal in real time and feeds back to the electric regulating valve. The electric regulating valve adjusts the valve opening to stabilize at the preset target outlet pressure value.

[0048] The distance between the flow sensor and the adjacent pipeline connecting flange is more than 6 times of the overall pipeline diameter.

[0049] The test platform has the characteristics of high power, high pressure and high speed, and can test the sealing performance of a 230mm diameter hydraulic sealing shaft. The driving motor power can reach 110kw, the pressure boundary condition can reach 1.5MPa, and the speed can reach 3500rev / min under extreme conditions.

[0050] The test method of the high-pressure and high-speed hydraulic sealing test device comprises the following steps:

[0051] S1, before the test, first debug the sealing shaft driving motor to ensure that the motor can start and stop normally and has no abnormality; second, fill water into the water tank through the water pipe, and open the power supply after the water level reaches a certain height;

[0052] S2, discharge the air in the pressure supply pump through the exhaust hole, start the pressure supply pump, and slowly increase the speed of the pump through the frequency converter; observe the bubble flow through the test section to judge the air discharge condition in the test pipe, and avoid the influence of air on the test measurement; when the air bubble discharge in the test pipe is completed, close the pressure supply pump, and close the water source when the water level in the water tank is higher than the water level line;

[0053] S3, connect the data acquisition line, debug the pressure, flow and temperature sensors to ensure that they are in normal initial state;

[0054] S4, during the test, set the test target pressure parameters for the pressure supply pump and the electric regulating valve, start the pressure supply pump, and combine the external data acquisition pressure sensor with the pressure supply pump and the regulating valve built-in sensor parameter state to judge whether the current pressure reaches and stabilizes at the expected value;

[0055] S5, adjust the outlet pipeline back pressure by adjusting the manual valve of the water tank, and observe the pressure sensor reading while adjusting the manual valve opening. Adjust to the electric regulating valve opening degree of about 75% to ensure that the electric regulating valve can automatically adjust the opening degree to meet the back pressure demand during the experiment;

[0056] S6, after judging that the test start condition is met, start the sealing shaft driving motor, gradually increase the speed to the target speed value, and observe the data acquisition system panel value. After the pressure, flow and other values are stable, start synchronous acquisition. Then, constantly cycle the above process until all corresponding tests are completed;

[0057] S7, when the single test is completed, the shaft drive motor is turned off, the pressure supply pump is turned off, and the water in the test circuit is drained through the water tank bottom drain valve. Finally, check to make sure all power is turned off.

[0058] The above description is only a description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application. Any modification or modification made by any person skilled in the art according to the above disclosed technical content should be regarded as equivalent effective embodiments, and belongs to the protection scope of the technical scheme of the present application.

Claims

1. A high-pressure, high-speed hydraulic sealing test device, characterized in that: It is driven by a drive motor (1) through a diaphragm coupling (2) to drive the hydraulic sealing test section (3) and fixed on a cast iron platform (9); the hydraulic sealing test section (3) includes a hydraulic sealing shaft (3b), a hydraulic sealing sleeve (3c), a hydraulic sealing cavity (3d), and a cylinder (3e) nested from the inside out. The hydraulic sealing test section (3) forms a closed water circulation loop with the pressure water inlet pipe (5), the sealing water inlet pipe (4), the first sealing water return pipe (6), the second sealing water return pipe (7), and the water tank (8); The sealing water inlet pipe (4) and the pressurized water inlet pipe (5) work together with the vertical pressurization pump through the pressure sensor and check valve to achieve stable and adjustable pressure inlet conditions. The pressure sensor collects the outlet pressure signal of the vertical pressurization pump in real time and feeds it back to the vertical pressurization pump. The vertical pressurization pump adjusts its speed to stabilize it at the preset target inlet pressure value. The first sealing water return pipeline (6) and the second sealing water return pipeline (7) work together with a pressure sensor, a butterfly valve and an electric regulating valve to achieve stable and adjustable pressure outlet conditions. The pressure sensor collects the outlet pressure signal of the electric regulating valve in real time and feeds it back to the electric regulating valve. The electric regulating valve adjusts the valve opening to stabilize it at the preset target outlet pressure value.

2. The high-pressure, high-speed hydraulic sealing test device according to claim 1, characterized in that: The sealing water inlet pipeline (4) is sequentially equipped with an inlet pipe interface corrugated pipe (4g), an inlet pipe check valve (4f), an inlet pipe flow sensor (4e), an inlet pipe pressure sensor (4c-1), an inlet pipe steady flow straight pipe section (4d), an inlet pipe vertical pressure pump (4c), an inlet pipe corrugated pipe (4b), and an inlet pipe butterfly valve (4a) from the self-hydraulic sealing test section (3) to the water tank (8).

3. The high-pressure, high-speed hydraulic sealing test device according to claim 2, characterized in that: The pressurized water inlet pipeline (5) includes, in sequence, a vertical pressurized pump (5a), a straight pressurized straight pipe section (5b), a pressure sensor (5a-1), a check valve (5c), and a corrugated pipe (5d) for the pressurized interface.

4. The high-pressure, high-speed hydraulic sealing test device according to claim 3, characterized in that: The first sealing water return pipeline (6) from the hydraulic sealing test section (3) to the water tank (8) is sequentially equipped with the first return water pipe interface corrugated pipe (6a), the first return water pipe flow sensor (6b), the first return water pipe valve front flow stabilizing straight pipe section (6c), the first return water pipe electric regulating valve (6d), the first return water pipe pressure sensor (6d-1), the first return water pipe valve rear flow stabilizing straight pipe section (6e), and the first return water pipe butterfly valve (6f). The second sealing water return pipeline (7) from the hydraulic sealing test section (3) to the water tank (8) is sequentially equipped with the second return water pipe interface corrugated pipe (7a), the second return water pipe flow sensor (7b), the second return water pipe valve front flow stabilizing straight pipe section (7c), the second return water pipe electric regulating valve (7d), the second return water pipe pressure sensor (7d-1), the second return water pipe valve rear flow stabilizing straight pipe section (7e), and the second return water pipe butterfly valve (7f).

5. The high-pressure, high-speed hydraulic sealing test device according to claim 4, characterized in that: The cylinder (3e) is provided with four threaded interfaces, namely a sealing water inlet (3e-1), a pressure water inlet (3e-2), a first sealing water return inlet (3e-3), and a second sealing water return inlet (3e-4); the sealing water inlet pipe (4) is connected to the sealing water inlet (3e-1) through the inlet pipe interface corrugated pipe (4g), the pressure water inlet pipe (5) is connected to the pressure water inlet (3e-2) through the pressure pipe interface corrugated pipe (5d), the first sealing water return pipe (6) is connected to the first sealing water return inlet (3e-3) through the first return pipe interface corrugated pipe (6a), and the second sealing water return pipe (7) is connected to the second sealing water return inlet (3e-4) through the second return pipe interface corrugated pipe (7a).

6. The high-pressure, high-speed hydraulic sealing test device according to claim 5, characterized in that: The hydraulic sealing test section (3) adopts an integrated design. A bearing seat (3a) is provided on one side of the drive motor (1), which is connected to the cylinder (3e) to form a closed whole. The bearing seat (3a) acts on the hydraulic sealing shaft (3b) on which a tapered roller bearing (3g) is installed.

7. The high-pressure, high-speed hydraulic sealing test device according to claim 6, characterized in that: A deep groove ball bearing (3j) is installed at the point where the hydraulic sealing shaft (3b) acts on the cylinder (3e).

8. The high-pressure, high-speed hydraulic sealing test device according to claim 7, characterized in that: All components in the pressurized water inlet pipe (5), the sealing water inlet pipe (4), the first sealing water return pipe (6), and the second sealing water return pipe (7) are connected by flanges. The distance from the flow sensor to the connecting flange is more than 6 times the diameter of the corresponding pipe.

9. The high-pressure, high-speed hydraulic sealing test device according to claim 8, characterized in that: The platform tested the sealing performance of a 230mm diameter hydraulic sealing shaft. Under extreme conditions, the maximum power of the drive motor reached 110kW, the maximum pressure boundary condition reached 1.5MPa, and the maximum speed reached 3500rev / min.

10. The test method of the high-pressure, high-speed hydraulic sealing test device according to claim 9, characterized in that, Includes the following steps: S1. Before the test, debug the drive motor, then fill the water tank with water through the water pipe. After the water level reaches the set height, turn on the power. S2. Expel the air from the vertical pressure pump through the vent, start the pump and increase its speed using the frequency converter; observe the flow of air bubbles in the hydraulic seal test section to determine the air discharge situation in the test tube; after the air bubble discharge in the hydraulic seal test section is completed, shut off the vertical pressure pump in the inlet pipe; when the water level in the water tank is below the water level line, shut off the water supply. S3. Connect the data acquisition line and test the pressure, flow, and temperature sensors to ensure they are in normal initial condition; S4. During the test, first set the target pressure parameters for the vertical pressure pump and the electric regulating valve, start the vertical pressure pump, and combine the external data acquisition pressure sensor and the parameter status of the built-in sensors of the vertical pressure pump and the electric regulating valve to determine whether the current pressure has reached and stabilized at the expected value. S5. Adjust the back pressure of the outlet pipeline by adjusting the manual valve of the water tank. While adjusting the opening of the manual valve, observe the reading of the pressure sensor. Adjust the opening of the electric regulating valve to 75% to ensure that the electric regulating valve automatically adjusts the opening to meet the back pressure requirements during the experiment. S6. After determining that the test start conditions are met, start the drive motor and increase the speed to the target speed value. Observe the values ​​on the data acquisition system panel. After the pressure, flow rate and other values ​​stabilize, start synchronous acquisition. Repeat the above steps until all corresponding tests are completed. S7. After a single test is completed, turn off the drive motor and the vertical pressure pump, and drain the water in the test circuit through the drain valve at the bottom of the water tank.

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