CN111024329A - High-pressure rotation combined sealing element performance detection and test device and method - Google Patents

High-pressure rotation combined sealing element performance detection and test device and method Download PDF

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Publication number
CN111024329A
CN111024329A CN201911382180.3A CN201911382180A CN111024329A CN 111024329 A CN111024329 A CN 111024329A CN 201911382180 A CN201911382180 A CN 201911382180A CN 111024329 A CN111024329 A CN 111024329A
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CN
China
Prior art keywords
pressure
sealing
valve
cabin
sealed
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CN201911382180.3A
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Chinese (zh)
Inventor
索双富
赵乐
时剑文
夏浩宇
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Tsinghua University
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Tsinghua University
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Priority to CN201911382180.3A priority Critical patent/CN111024329A/en
Publication of CN111024329A publication Critical patent/CN111024329A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

Abstract

A performance detection and test device and method for a high-pressure rotating combined sealing element are disclosed, wherein the device comprises: the high-pressure rotary sealed cabin comprises a sealed cabin body and a rotating shaft which are coaxially arranged, the rotating shaft is positioned in the sealed cabin body, the inner surface of the sealed cabin body is provided with a first sealed groove and a second sealed groove which form a sealed cavity with the rotating shaft, a pressure hole is formed between the first sealed groove and the second sealed groove on the sealed cabin body, and the middle part of the rotating shaft is provided with a groove to form a containing cavity communicated with the pressure hole; the driving unit is connected with the rotating shaft to drive the rotating shaft to rotate; the pressurizing system is connected with the pressure hole to pressurize the high-pressure rotary sealed cabin; and the detection system is used for detecting the friction torque and the rotating speed of the rotating shaft and the pressure and the temperature of the high-pressure rotating sealed cabin. The invention can complete the static and dynamic sealing performance test of the large-diameter combined sealing element under high pressure, realize the detection of friction torque and leakage under different pressures and rotating speeds, and realize the performance comparison test of the sealing elements made of different materials or with different sections.

Description

High-pressure rotation combined sealing element performance detection and test device and method
Technical Field
The invention belongs to the technical field of fluid rotary sealing, relates to performance detection and test of a combined sealing element on a high-pressure rotary motion part in hydraulic transmission equipment, and provides a device and a method for detecting and testing the performance of a high-pressure rotary combined sealing element.
Background
The development of the sealing technology is closely related to engineering application, and sealing detection and test are key links of system design and research. In recent years, the combined seal has the advantages of strong bearing capacity and long service life and is applied to many fields such as deep sea exploration, oil drilling, aviation tests and the like. Particularly, in large-scale equipment, a combined sealing element with large diameter and high pressure-bearing capacity is often required to be adopted. Because the sealing element is easy to lose efficacy under high pressure to cause system failure, even serious accidents, the reliability and safety of the system are directly influenced by the performance detection and test of the sealing element. The existing rotary seal test device has multiple needles for low-pressure or medium-small-diameter sealing elements, the device can bear small pressure and has single function, and the high-pressure large-diameter sealing requirement is difficult to meet, so that the device capable of carrying out comprehensive performance detection and test on the high-pressure large-diameter combined sealing element is designed to have strong practical requirements.
Disclosure of Invention
Based on the prior art, the invention aims to provide a device and a method for detecting and testing the performance of a high-pressure rotating combined sealing element.
In order to achieve the purpose, the invention adopts the technical scheme that:
a high pressure rotation combination sealing member performance detection and test device includes:
the high-pressure rotary sealed cabin 105 comprises a sealed cabin body 200 and a rotating shaft 201 which are coaxially arranged, the rotating shaft 201 is positioned in the sealed cabin body 200, the inner surface of the sealed cabin body 200 is provided with a first sealed groove 216 for installing a first sealing ring 303 to be tested and a second sealed groove 215 for installing a second sealing ring 300 to be tested, the first sealed groove 216 and the second sealed groove 215 form a sealed cavity with the rotating shaft 201, a pressure hole 214 is formed on the sealed cabin 200 between the first sealed groove 216 and the second sealed groove 215, the middle of the rotating shaft 201 is provided with a groove to form a receiving cavity communicated with the pressure hole 214, a first annular groove 218 is arranged at the bottom of the sealed cabin body 200 on the non-pressure side of the first sealed groove 216, a second annular groove 217 is arranged on the non-pressure side of the second sealed groove 215, a first leakage hole 302 is formed at the bottom of the first annular groove 218, and a second leakage hole 301 is formed at the bottom of the second annular groove 217;
the driving unit 100 is connected with the rotating shaft 201 through a transmission system to drive the rotating shaft to rotate;
a pressurizing system 107 connected with the pressure hole 214 to pressurize the high-pressure rotary sealed cabin 105;
and the detection system detects the friction torque and the rotating speed of the rotating shaft 201 and the pressure and the temperature of the high-pressure rotating sealed cabin 105.
The first sealing groove 216 and the second sealing groove 215 are symmetrical about the axial midpoint of the sealing cabin 200, and the first sealing ring 303 to be tested and the second sealing ring 300 to be tested are installed to be matched with the surface of the rotating shaft 201 to form sealing surfaces.
The left side and the right side of the sealed cabin body 200 are provided with positioning grooves and screw holes for mounting a left base 202 and a right base 206; the front end and the rear end of the sealed cabin 200 are respectively connected with a front end cover 203 and a rear end cover 205 which have the same structure and are provided with jackscrew holes 210 through positioning pins 211 and bolts, the joint of the front end and the rear end of the sealed cabin 200 is provided with vent holes 212, a support bearing 204 and an oil baffle ring 207 are respectively arranged in the front end cover 203 and the rear end cover 205, and the sealed cabin 200 is provided with lug holes 213.
The driving unit 100 includes a driving motor, a reducer, and a frequency converter; the frequency converter is used for controlling the driving motor to start, rotate positively and negatively and regulate speed.
The transmission system comprises a first coupler 101 connected with the output end of the driving unit 100 and a second coupler 103 connected with the rotating shaft 201, the first coupler 101 is connected with the second coupler 103, a torque and rotating speed integrated sensor 102 is arranged at the joint, a pressure and temperature integrated sensor 104 is arranged at the top of the sealed cabin body 200, the torque and rotating speed integrated sensor 102 and the pressure and temperature integrated sensor 104 form a detection system, and the detection system is connected with the data acquisition and processing system 106.
The pressurization system 107 includes an automatic pressurization system and a manual pressurization system.
The automatic pressurization system comprises a hydraulic oil tank 417, wherein the inlet of a high-pressure pump 416 is connected with a second oil filter 418 in the hydraulic oil tank 417, the outlet is connected with the inlets of a third electromagnetic ball valve 413 and a second check valve 412, the outlet of the second check valve 412 is connected with the inlet of a second electromagnetic ball valve 411, the outlet of the second electromagnetic ball valve 411 is connected with the inlet of a fourth check valve 410, the outlet of the fourth check valve 410 is connected with the inlet of a first electromagnetic valve 409, and the outlet of the first electromagnetic valve 409 is connected with a pressure hole 214;
the manual pressurization system includes a hand pump tank 400, a hand pump 403 having an inlet connected to a first oil filter 401 in the hand pump tank 400, an outlet connected to an inlet of a first check valve 404, an outlet of the first check valve 404 connected to an inlet of a ball valve switch 406, and an outlet of the ball valve switch 406 connected to a pressure port 214.
The invention also provides a method based on the device for detecting and testing the performance of the high-pressure rotating combined sealing element, after the device is assembled, the device drives the rotating shaft 201 to rotate by using the starting driving unit 100, and the high-pressure rotating sealed cabin 105 is pressurized by using the pressurizing system 107, wherein:
when the automatic pressurization system works, a driving motor 415 is started to drive a high-pressure pump 416 to work, and oil in a hydraulic oil tank 417 is sucked and pressurized through a second oil filter 418; when the system is not loaded, the right position of the third electromagnetic ball valve 413 is accessed, oil returns to an oil tank through the right position of the third electromagnetic ball valve 413, and the system has no pressure; during loading, the third electromagnetic ball valve 413 is connected at the left position, and oil enters the sealed cavity of the high-pressure rotary sealed cabin 105 through a high-pressure pipeline, the second one-way valve 412, the left position of the second electromagnetic ball valve 411, the fourth one-way valve 410 and the right position of the first electromagnetic valve 409; when the set pressure of the system is reached, the second electromagnetic ball valve 411 is connected to the right, and the system realizes pressure maintaining by means of the fourth one-way valve 410; during unloading, the first electromagnetic ball valve 409 is connected at the left position, oil in the sealed cavity returns to the hydraulic oil tank 417 through the first electromagnetic ball valve 409 at the left position, and the system realizes unloading; the second overflow valve 414 sets a safety pressure as required, the pressure gauge 407 is used for displaying the system pressure, and the pressure gauge switch 408 is used for opening or closing; each electromagnetic valve of the hydraulic system is controlled and switched by a PLC electric control system to complete the loading, pressure maintaining and unloading of the high-pressure rotary sealed cabin 105; the system pressure is adjustable within the range of 0-50MPa, and the test and experiment of the leakage amount, the torque, the pressure and the temperature of the sealing ring to be tested under different pressures can be completed by setting different system pressures;
when the manual pressurization system works, a valve switch 406 is opened, the system is connected into a sealed channel through a quick connector 405, a manual pump 403 is manually operated, oil in a manual pump oil tank 400 is sucked through a first oil filter 401 and enters the high-pressure rotary sealed cabin 105 through a high-pressure pipeline, a first one-way valve 404, the quick connector 405 and the valve switch 407, and system loading is realized; when the set pressure is reached, stopping the hand pump 403, and maintaining the pressure of the system; during unloading, the first electromagnetic ball valve 409 is operated to enable the left position of the first electromagnetic ball valve 409 to be accessed, and the system realizes unloading; when the static detection and test are carried out on the sealing ring to be tested, the manual pressurization system is adopted for pressurization, so that the related detection and test contents can be conveniently and quickly completed;
the data acquisition and processing system 106 acquires and processes detection signals of the detection system for system regulation and control, and records and displays acquired data.
During the test, the driving unit 100 can be adjusted to realize different driving speeds.
During testing, the same sealing rings to be tested can be arranged in the first sealing groove 216 and the second sealing groove 215, so that the friction torque and leakage rate test under different pressures and rotating speeds can be realized; or different sealing rings to be tested are respectively arranged in the first sealing groove 216 and the second sealing groove 215, and different sealing ring performance comparison tests are carried out.
Compared with the prior art, the invention has the beneficial effects that: the whole structure is compact, the installation is simple and convenient, and the safety and the reliability are realized; the static and dynamic sealing performance test of the large-diameter combined sealing element under high pressure can be completed, the detection of friction torque and leakage amount under different pressures and rotating speeds can be realized, and the performance comparison test of the sealing elements made of different materials or with different section shapes can also be realized; corresponding simulation tests can be carried out according to the actual use working conditions of the sealing element; the parameters of the test pressure, the temperature, the torque and the rotating speed are displayed in real time, a test data curve can be generated, and the test data can be conveniently stored and printed.
Drawings
Fig. 1 is a schematic view of the overall structure.
Fig. 2 is a view showing the structure of the high-pressure rotary sealed cabin.
Fig. 3 is a sectional view of the high pressure rotary sealed cabin.
Fig. 4 is a schematic diagram of a hydraulic system.
In the figure: 100. a drive unit 101, a first coupling; 102. a torque and rotation speed integrated sensor; 103. a second coupling; 104. a pressure and temperature integrated sensor; 105. a high-pressure rotary sealed cabin; 106. a data acquisition processing system; 107. a pressurized system; 108. a sensor base; 109. a work table; 200. sealing the cabin body; 201. a rotating shaft; 202. a left base; 203. a front end cover; 204. a bearing; 205. a rear end cap; 206. a right base; 207. an oil slinger; 210. a jackscrew hole; 211. positioning pins; 212. a vent hole; 213. a lug hole; 214. a pressure port; 215. a second seal groove; 216. a first seal groove; 217. a second annular groove; 218. a first annular groove; 300. a second sealing ring to be tested; 301. a second leak hole; 302. a first leak hole; 303. a first to-be-tested sealing ring; 400. a hand pump oil tank; 401. a first oil filter; 402. a first overflow valve; 403. a hand pump; 404. a first check valve; 405. a quick coupling; 406. a ball valve switch; 407. a pressure gauge; 408. a pressure gauge switch; 409. a first electromagnetic ball valve; 410. a second one-way valve; 411. a second electromagnetic ball valve; 412. a third check valve; 413. a third electromagnetic ball valve; 414. a second overflow valve; 415. a drive motor; 416. a high pressure pump; 417. a hydraulic oil tank; 418. a second oil filter.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in FIG. 1, the device for detecting and testing the performance of the high-pressure large-diameter sealing element mainly comprises a driving unit 100, a high-pressure rotary sealed cabin 105, a measuring system, a pressurizing system 107 and a workbench 109. A threaded hole is processed on the workbench 109, and the threaded hole passes through the bolt fixing driving unit 100, the sensor base 108 and the high-pressure rotary sealed cabin 105 from left to right in sequence. The driving unit 100 includes a driving motor, a reducer and a frequency converter, and in order to make the system structure compact, a reducing motor with a motor and a reducer integrated is selected, and a motor base is fixedly connected with the workbench 109 through bolts.
The measuring system comprises a torque and rotating speed integrated sensor 102, a pressure and temperature integrated sensor 104 and a data acquisition and processing system 106, wherein the torque and rotating speed integrated sensor 102 is used for measuring the rotating speed and the friction torque of the system, an output shaft of a driving unit 100 is connected with the left end of the torque and rotating speed integrated sensor 102 through a first coupler 101, and the right end of the torque and rotating speed integrated sensor 102 is connected with the input end of a high-pressure rotating sealed cabin 105 through a second coupler 103; the torque/rotation speed integrated sensor 103 is fixed to the table 109 via a sensor mount 108. The pressure and temperature integrated sensor 104 is installed on the top of the high-pressure rotary sealed cabin 105 and is used for measuring the pressure and temperature signals of the sealed cavity, and the pressure and temperature signals form a detection system. The data acquisition and processing system 106 is used for acquiring and processing sensor signals for system regulation and control, and recording and displaying acquired data; during the test, the driving unit 100 can be adjusted according to the requirement to realize different driving rotating speeds, and the torque test of 200N ∙ m and the rotating speed test of 100rpm can be realized at the highest through the torque and rotating speed integrated sensor 103.
As shown in fig. 2 and 3, the high-pressure rotary sealed cabin 105 mainly comprises a sealed cabin body 200, a rotating shaft 201, a sealing ring to be tested, an end cover, two groups of bearings 204 and oil slingers 207 with the same model, two positioning pins 211 which are symmetrical front and back, and a base; the top of the sealed cabin body 200 is provided with a pressure hole 214 as an inlet and outlet passage of pressure oil, two sides of the top are respectively provided with a lug hole 213 for mounting a lug, and the front and the back of the top are respectively provided with a positioning pin vent hole 212 for facilitating the pulling and inserting of a positioning pin; the inner surface of the sealed cabin body 200 is symmetrically provided with a first sealed groove 216 and a second sealed groove 215 for installing a sealing ring to be tested, and forms a sealed cavity with the rotating shaft 201, the bottom of the cabin body is respectively provided with a first annular groove 218 and a second annular groove 217 on the pressure-free side of the sealed groove, the bottom of the corresponding annular groove is provided with a second leakage hole 301 and a first leakage hole 302 for observing the leakage condition of sealed oil, the leaked oil is collected into a measuring device through the leakage holes, the oil can be returned into an oil tank for recycling after the measurement is completed, and the left side and the right side of the sealed cabin body are provided with positioning grooves and screw holes for installing a base.
The pressure hole 214 is positioned between the first sealing groove 216 and the second sealing groove 215, the middle part of the rotating shaft 201 is recessed to form an accommodating cavity communicated with the pressure hole 214, the rotating shaft 201 and the sealing cabin body 200 are coaxially installed, a sealing cavity is formed by the rotating shaft 201 and a sealing ring to be tested in the sealing groove, the surface of the shaft is matched with the sealing ring to be tested to form a sealing surface, different tolerance matching parameters can be adopted according to different pressure requirements, in the embodiment, the hole-shaft diameter matching tolerance H8/f8 is selected, 50MPa pressure resistance is realized, and in order to avoid damage to the sealing element during installation, a chamfer and a rounded edge line is arranged at the shaft; the end cover comprises a front end cover 203 and a rear end cover 205 which have the same structure, two jackscrew holes 210 are formed in the front end cover and the rear end cover to facilitate the mounting and dismounting of the bearings, the end covers are fixed at the front end and the rear end of the sealed cabin body 200 through bolts, a front support bearing 204 and a rear support bearing 204 are mounted in the end covers to support the rotation of the rotating shaft 201 and limit the rotation of the rotating shaft to move forwards and backwards, and the oil slinger 207 is used for preventing; the base comprises a left base 202 and a right base 206 which have the same structure, the vertical section is inserted into the positioning groove of the sealed cabin 200 and is fixed through bolt connection, and the horizontal section is fixed on the workbench 107 through bolt.
The sealing ring to be detected comprises a first sealing ring to be detected 303 and a second sealing ring to be detected 300, in the embodiment, a hole with the diameter of 100mm is mainly used as the sealing ring to be detected, and the GREEN ring is formed by combining a rubber O-shaped ring and a modified Polytetrafluoroethylene (PTFE) sealing ring; the GREEN for the holes has different materials and section shapes, and different sealing elements can be selected for detection and test according to actual needs.
When the high-pressure rotary sealed cabin 105 is assembled, firstly, sealing rings to be tested are respectively installed in the first sealed groove 216 and the second sealed groove 215, the rear end cover 205 is installed on the sealed cabin 200, then, one end of the rotary shaft 201 is installed on the bearing 204 from the front end of the sealed cabin 200, and then, the front end cover 203 penetrates through the other end of the rotary shaft 201 and is installed on the front end of the sealed cabin 200. During testing, the same sealing rings to be tested can be arranged in the first sealing groove 216 and the second sealing groove 215, so that the friction torque and leakage rate test under different pressures and rotating speeds can be realized; different sealing rings to be tested can be respectively arranged in the first sealing groove 216 and the second sealing groove 215, and different sealing member performance comparison tests can be carried out.
As shown in fig. 4, the pressurization system 107 includes an automatic pressurization system and a manual pressurization system; the automatic pressurization system drives the high-pressure ball valve by a PLC (programmable logic controller) electric control system to realize loading, pressure maintaining and unloading of the high-pressure rotary sealed cabin; the manual pressurization system realizes the loading of the high-pressure rotary sealed cabin by manually operating a manual pressurization pump.
Specifically, the automatic pressurization system comprises a hydraulic oil tank 417, wherein the inlet of a high-pressure pump 416 is connected with a second oil filter 418 in the hydraulic oil tank 417, the outlet is connected with the inlets of a third electromagnetic ball valve 413 and a second check valve 412, the outlet of the second check valve 412 is connected with the inlet of a second electromagnetic ball valve 411, the outlet of the second electromagnetic ball valve 411 is connected with the inlet of a fourth check valve 410, the outlet of the fourth check valve 410 is connected with the inlet of a first electromagnetic valve 409, and the outlet of the first electromagnetic valve 409 is connected with a pressure hole 214.
When the automatic pressurization system works, the driving motor 415 is started to drive the high-pressure pump 416 to work, and oil in the hydraulic oil tank 417 is sucked and pressurized through the second oil filter 418; when the system is not loaded, the right position of the third electromagnetic ball valve 413 is accessed, oil returns to the oil tank through the right position of the third electromagnetic ball valve 413, and the system has no pressure; during loading, the third electromagnetic ball valve 413 is connected to the left, and oil enters the sealed cavity of the high-pressure rotary sealed cabin 105 through the high-pressure pipeline, the second one-way valve 412, the left position of the second electromagnetic ball valve 411, the fourth one-way valve 410 and the right position of the first electromagnetic valve 409; when the set pressure of the system is reached, the second electromagnetic ball valve 411 is connected to the right, and the system maintains pressure by means of the fourth one-way valve 410; during unloading, the first electromagnetic ball valve 409 is connected to the left, oil in the sealed cavity returns to the hydraulic oil tank 417 through the left position of the first electromagnetic ball valve 409, and the system realizes unloading; the second overflow valve 414 can set a safety pressure as required, the pressure gauge 407 is used for displaying the system pressure, and can be opened or closed through the pressure gauge switch 408; each electromagnetic valve of the hydraulic system is controlled and switched by a PLC electric control system to complete the loading, pressure maintaining and unloading of the high-pressure rotary sealed cabin 105; the system pressure is adjustable within the range of 0-50MPa, and the test and experiment of the leakage amount, the torque, the pressure and the temperature of the sealing ring to be tested under different pressures can be completed by setting different system pressures.
The manual pressurization system includes a hand pump tank 400, a hand pump 403 having an inlet connected to a first oil filter 401 in the hand pump tank 400, an outlet connected to an inlet of a first check valve 404, an outlet of the first check valve 404 connected to an inlet of a ball valve switch 406, and an outlet of the ball valve switch 406 connected to a pressure port 214.
When the manual pressurization system works, a valve switch 406 is opened, the system is connected into a sealed channel through a quick connector 405, a manual pump 403 is manually operated, oil in an oil tank 400 of the manual pump is sucked through a first oil filter 401 and enters a high-pressure rotary sealed cabin 105 through a high-pressure pipeline, a first one-way valve 404, the quick connector 405 and a valve switch 407, and system loading is realized; when the set pressure is reached, the hand pump 403 is stopped, and the system is kept in pressure; during unloading, the first electromagnetic ball valve 409 is operated to enable the left position of the first electromagnetic ball valve to be accessed, and the system realizes unloading; when the static detection and the test are carried out on the sealing ring to be detected, a manual pressurization system is adopted for pressurization, and the related detection and test contents can be conveniently and rapidly completed.
In conclusion, the device has the advantages of compact integral structure, simple and convenient installation, safety and reliability; the static and dynamic sealing performance test of the large-diameter combined sealing element under high pressure can be completed, the detection of friction torque and leakage amount under different pressures and rotating speeds can be realized, and the performance comparison test of the sealing elements made of different materials or with different section shapes can also be realized; corresponding simulation tests can be carried out according to the actual use working conditions of the sealing element; the parameters of the test pressure, the temperature, the torque and the rotating speed are displayed in real time, a test data curve can be generated, and the test data can be conveniently stored and printed.

Claims (10)

1. The utility model provides a rotatory combination sealing member performance of high pressure detects and testing device which characterized in that includes:
the high-pressure rotary sealing cabin (105) comprises a sealing cabin body (200) and a rotating shaft (201) which are coaxially installed, the rotating shaft (201) is located in the sealing cabin body (200), the inner surface of the sealing cabin body (200) is provided with a first sealing groove (216) used for installing a first sealing ring (303) to be tested and a second sealing groove (215) used for installing a second sealing ring (300) to be tested, the first sealing groove (216) and the second sealing groove (215) form a sealing cavity with the rotating shaft (201), a pressure hole (214) is formed between the first sealing groove (216) and the second sealing groove (215) on the sealing cabin body (200), the middle part of the rotating shaft (201) is provided with a groove to form a containing cavity communicated with the pressure hole (214), a first annular groove (218) is formed in the non-pressure side of the first sealing groove (216) at the bottom of the sealing cabin body (200), and a second annular groove (217) is formed in the non-pressure side of the second sealing groove (215), a first leakage hole (302) is formed at the bottom of the first annular groove (218), and a second leakage hole (301) is formed at the bottom of the second annular groove (217);
the driving unit (100) is connected with the rotating shaft (201) through a transmission system to drive the rotating shaft to rotate;
a pressurization system (107) which is connected with the pressure hole (214) and pressurizes the high-pressure rotary sealed cabin (105);
and the detection system detects the friction torque and the rotating speed of the rotating shaft (201) and the pressure and the temperature in the high-pressure rotating sealed cabin (105).
2. The performance testing and testing device for the high-pressure rotating combined sealing element according to claim 1, wherein the first sealing groove (216) and the second sealing groove (215) are symmetrical with respect to an axial midpoint of the sealing cabin (200), and the first sealing ring to be tested (303) and the second sealing ring to be tested (300) are installed and then matched with the surface of the rotating shaft (201) to form sealing surfaces.
3. The high-pressure rotating combined sealing member performance detecting and testing device as claimed in claim 1, wherein the left and right sides of the sealing chamber (200) are provided with positioning grooves and screw holes for mounting the left base (202) and the right base (206); the front end and the rear end of the sealed cabin body (200) are respectively provided with a front end cover (203) and a rear end cover (205) which are the same in structure and are provided with jackscrew holes (210) through positioning pins (211) and bolts, the front end and the rear end of the sealed cabin body (200) are provided with vent holes (212) at the joint, the front end cover (203) and the rear end cover (205) are internally provided with a support bearing (204) and an oil scraper ring (207), and the sealed cabin body (200) is provided with lug holes (213).
4. The high-pressure rotary composite seal performance testing and experiment device according to claim 1, wherein the driving unit (100) comprises a driving motor, a reducer and a frequency converter; the frequency converter is used for controlling the driving motor to start, rotate positively and negatively and regulate speed.
5. The high-pressure rotating combined seal performance detecting and testing device according to claim 1 or 4, wherein the transmission system comprises a first coupler (101) connected with the output end of the driving unit (100) and a second coupler (103) connected with the rotating shaft (201), the first coupler (101) and the second coupler (103) are connected, a torque and rotating speed integrated sensor (102) is arranged at the joint, a pressure and temperature integrated sensor (104) is arranged at the top of the sealed cabin body (200), the torque and rotating speed integrated sensor (102) and the pressure and temperature integrated sensor (104) form a detection system, and the detection system is connected with the data acquisition and processing system (106).
6. The high pressure rotary compound seal performance testing and testing apparatus of claim 1, wherein the pressurization system (107) comprises an automatic pressurization system and a manual pressurization system.
7. The high-pressure rotary combination seal performance detection and test device is characterized in that the automatic pressurization system comprises a hydraulic oil tank (417), an inlet of a high-pressure pump (416) is connected with a second oil filter (418) in the hydraulic oil tank (417), an outlet of the high-pressure pump is connected with inlets of a third electromagnetic ball valve (413) and a second check valve (412), an outlet of the second check valve (412) is connected with an inlet of a second electromagnetic ball valve (411), an outlet of the second electromagnetic ball valve (411) is connected with an inlet of a fourth check valve (410), an outlet of the fourth check valve (410) is connected with an inlet of a first electromagnetic valve (409), and an outlet of the first electromagnetic valve (409) is connected with a pressure hole (214);
the manual pressurization system comprises a hand pump oil tank (400), wherein the inlet of a hand pump (403) is connected with a first oil filter (401) in the hand pump oil tank (400), the outlet of the hand pump oil tank is connected with the inlet of a first one-way valve (404), the outlet of the first one-way valve (404) is connected with the inlet of a ball valve switch (406), and the outlet of the ball valve switch (406) is connected with a pressure hole (214).
8. The method for detecting and testing the performance of the high-pressure rotating combined sealing element according to claim 7, wherein after the device is assembled, the rotating shaft (201) is driven to rotate by the starting driving unit (100), and the high-pressure rotating sealed cabin (105) is pressurized by the pressurizing system (107), wherein:
when the automatic pressurization system works, a driving motor (415) is started to drive a high-pressure pump (416) to work, and oil in a hydraulic oil tank (417) is sucked and pressurized through a second oil filter (418); when the system is not loaded, the right position of a third electromagnetic ball valve (413) is connected, oil returns to an oil tank through the right position of the third electromagnetic ball valve (413), and the system has no pressure; during loading, the left position of the third electromagnetic ball valve (413) is connected, and oil enters a sealed cavity of the high-pressure rotary sealed cabin (105) through a high-pressure pipeline, the left position of the second one-way valve (412), the left position of the second electromagnetic ball valve (411), the right position of the fourth one-way valve (410) and the right position of the first electromagnetic valve (409); when the set pressure of the system is reached, the right position of the second electromagnetic ball valve (411) is connected, and the system realizes pressure maintaining by means of the fourth one-way valve (410); during unloading, the left position of the first electromagnetic ball valve (409) is connected, oil in the sealed cavity returns to the hydraulic oil tank (417) through the left position of the first electromagnetic ball valve (409), and the system realizes unloading; the second overflow valve (414) sets safety pressure according to the requirement, and the pressure gauge (407) is used for displaying the system pressure and is opened or closed through a pressure gauge switch (408); each electromagnetic valve of the hydraulic system is controlled and switched by a PLC electric control system to complete the loading, pressure maintaining and unloading of the high-pressure rotary sealed cabin (105); the system pressure is adjustable within the range of 0-50MPa, and the test and experiment of the leakage amount, the torque, the pressure and the temperature of the sealing ring to be tested under different pressures can be completed by setting different system pressures;
when the manual pressurization system works, a valve switch (406) is opened, the system is connected into a sealed channel through a quick coupling (405), a hand pump (403) is manually operated, oil in a hand pump oil tank (400) is sucked through a first oil filter (401) and enters a high-pressure rotary sealed cabin (105) through a high-pressure pipeline, a first one-way valve (404), the quick coupling (405) and the valve switch (407), and system loading is realized; when the set pressure is reached, stopping the hand pump (403), and maintaining the pressure of the system; during unloading, the first electromagnetic ball valve (409) is operated to enable the first electromagnetic ball valve to be connected to the left, and the system realizes unloading; when the static detection and test are carried out on the sealing ring to be tested, the manual pressurization system is adopted for pressurization, so that the related detection and test contents can be conveniently and quickly completed;
the data acquisition and processing system (106) acquires and processes detection signals of the detection system for system regulation and control, and records and displays the acquired data.
9. The method according to claim 8, characterized in that the drive unit (100) is adjusted to achieve different drive speeds during the test.
10. The method of claim 8, characterized in that, during the test, the same sealing ring to be tested is arranged in the first sealing groove (216) and the second sealing groove (215) to realize the friction torque and leakage test under different pressures and rotating speeds; or different sealing rings to be tested are respectively arranged in the first sealing groove (216) and the second sealing groove (215) to carry out different sealing ring performance comparison tests.
CN201911382180.3A 2019-12-28 2019-12-28 High-pressure rotation combined sealing element performance detection and test device and method Pending CN111024329A (en)

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