CN110823467A - High-pressure sealing ring testing device and testing method - Google Patents

High-pressure sealing ring testing device and testing method Download PDF

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Publication number
CN110823467A
CN110823467A CN201911172622.1A CN201911172622A CN110823467A CN 110823467 A CN110823467 A CN 110823467A CN 201911172622 A CN201911172622 A CN 201911172622A CN 110823467 A CN110823467 A CN 110823467A
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CN
China
Prior art keywords
plug
pressure
testing
test piece
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911172622.1A
Other languages
Chinese (zh)
Inventor
高明忠
谢和平
陈领
张志龙
吴年汉
李聪
李佳南
何志强
杨明庆
余波
胡云起
黄伟
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Shenzhen University
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Shenzhen University
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Filing date
Publication date
Application filed by Shenzhen University filed Critical Shenzhen University
Priority to CN201911172622.1A priority Critical patent/CN110823467A/en
Publication of CN110823467A publication Critical patent/CN110823467A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • 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
    • G01M13/005Sealing rings
    • 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
    • G01M3/002Investigating fluid-tightness of structures by using thermal means
    • 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

Abstract

The invention relates to a testing device and a testing method for a high-pressure sealing ring, which comprises a pressure chamber, wherein the pressure chamber comprises a cylinder body and a testing piece mounting structure, and one end of the cylinder body is provided with a medium channel communicated with the interior of the cylinder body; the test piece mounting structure comprises an outer plug, an inner plug and an end cover, the outer plug is in threaded connection with the other end of the barrel, the inner plug is mounted in a circular hole of the outer plug, and an annular groove for mounting a test piece is formed in the outer wall of the inner plug; the end cover axially props the inner plug and the outer plug from the outer end, and the end cover is in threaded connection with the outer plug. The invention can be used for testing sealing rings with different wire diameters and different thicknesses, sealing groove shapes and the like, and has simple assembly and convenient use; the method of the invention tests the performance of the sealing ring at different temperatures and different pressures, so that the performance evaluation of the sealing ring is more complete and comprehensive, and the test result is more reliable.

Description

High-pressure sealing ring testing device and testing method
Technical Field
The invention relates to the technical field of testing equipment, in particular to a high-pressure sealing ring testing device and a testing method.
Background
Seal rings are common seals. Various sealing rings are used in fidelity corers. The performance of the sealing ring directly influences the pressure maintaining performance of the fidelity cabin and the like.
The existing sealing ring testing device is generally used for checking the sealing performance under normal pressure, a high-pressure storage rock core is usually required for a fidelity coring device, the sealing ring is in a high-pressure environment at the moment, and even a qualified product under the normal pressure can generate leakage.
In addition, most of the existing sealing ring testing devices are used for testing the sealing rings with the same size, but a plurality of testing devices are needed for a plurality of sealing rings with different sizes of the fidelity coring device, and the cost is high.
Disclosure of Invention
The invention aims to provide a high-pressure sealing ring testing device and a testing method, which are convenient for testing the sealing performance of a sealing ring in a high-pressure environment.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the high-pressure sealing ring testing device comprises a pressure chamber, wherein the pressure chamber comprises a cylinder body and a testing piece mounting structure, one end of the cylinder body is provided with a medium channel communicated with the interior of the cylinder body, the other end of the cylinder body is provided with a coaxial first threaded hole, and the first threaded hole is communicated with the interior of the cylinder body;
the test piece mounting structure comprises an outer plug, an inner plug and an end cover, wherein the outer plug is in threaded connection with a first threaded hole of the barrel, a round hole matched with the inner plug is formed in the outer plug, and the round hole axially penetrates through the outer plug;
the inner plug is arranged in the round hole of the outer plug, and the outer wall of the inner plug is provided with an annular groove for mounting a test piece;
the outer end of the inner plug is provided with a boss; the end cover axially and tightly pushes the inner plug and the outer plug from the outer end, so that the boss of the inner plug is axially and tightly attached to the outer plug, and the end cover is in threaded connection with the barrel or the outer plug.
Furthermore, a boss is arranged at the outer end part of the outer plug, and the boss of the outer plug is axially attached to the cylinder body through the end cover.
Furthermore, the round hole of the outer plug is a stepped hole, and the end cover enables the boss of the inner plug to be tightly attached to the stepped surface of the stepped hole.
Furthermore, a second coaxial threaded hole is formed in the other end of the barrel and communicated with the interior of the barrel, a plug is installed in the second threaded hole and connected with the barrel in a threaded mode, the medium channel is arranged on the plug, and the medium channel axially penetrates through the plug.
Furthermore, a pressure sensor interface is also arranged on the plug and communicated with the interior of the cylinder body.
Preferably, a sealing ring is arranged between the plug and the barrel.
Furthermore, an installation space for installing a humidity sensor is arranged between the inner plug and the outer plug, and the installation space is located at the outer end of the test piece.
The method for testing the high-pressure sealing ring by using the testing device for the high-pressure sealing ring comprises the following steps;
s1, mounting the test piece in the annular groove on the outer wall of the inner plug, mounting a humidity sensor between the outer wall of the inner plug and the inner wall of the outer plug, wherein the humidity sensor is positioned at the outer end of the test piece;
and S2, injecting a fluid medium into the cylinder through the medium channel, maintaining the pressure for a certain time, and testing the sealing performance of the test piece.
Preferably, the medium channel is externally connected with a hydraulic source, the output pressure of the hydraulic source is changed, and the sealing performance of the test piece under different pressures is tested.
Further preferably, the liquid medium is heated to test the sealing performance of the test piece at different temperatures.
Compared with the prior art, the invention has the following beneficial effects:
the invention can be used for testing sealing rings with different wire diameters and different thicknesses, sealing groove shapes and the like, only the diameter of an inner plug, the shape of an annular groove and the wall thickness of an outer plug need to be changed according to different testing conditions, the whole testing device does not need to be replaced, and the invention has simple assembly and convenient use;
2, the invention can provide high-pressure environment for the performance test of the sealing ring, and can test the sealing performance of the sealing ring in the high-pressure environment;
3, the method of the invention tests the performance of the sealing ring at different temperatures and different pressures, so that the performance evaluation of the sealing ring is more complete and comprehensive, the test result is more reliable, and the fidelity performance of the fidelity coring device is ensured.
Drawings
FIG. 1 is a schematic view of the construction of a pressure chamber according to the invention;
fig. 2 is a schematic diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, the testing device for the high-pressure sealing ring disclosed by the invention comprises a pressure chamber 10, wherein the pressure chamber 10 comprises a cylinder body 1 and a testing piece mounting structure.
Coaxial screw holes are formed in the two ends of the barrel body 1, and the screw holes are communicated with the interior of the barrel body 1. A plug 21 is arranged in the threaded hole at one end, and the plug 21 is in threaded connection with the barrel 1. The plug 21 is provided with a medium channel 22 and a pressure sensor interface 23, the medium channel 22 and the pressure sensor interface 23 axially penetrate through the plug 21, and the medium channel 22 can be externally connected with a hydraulic source as an injection port.
The test piece mounting structure comprises an outer plug 31, an inner plug 32 and an end cover 33, the outer plug 31 is in threaded connection with a threaded hole at the other end of the barrel body 1, a round hole matched with the inner plug 32 is formed in the outer plug 31, and the round hole axially penetrates through the outer plug 31.
The inner plug 32 is arranged in a round hole of the outer plug 31, and the outer wall of the inner plug 32 is provided with an annular groove for installing the test piece 4; the round hole of the outer plug 31 is a stepped hole.
The outer ends of the inner plug 32 and the outer plug 31 are both provided with a lug boss 34; the end cover 33 axially pushes the inner plug 32 and the outer plug 31 from the outer end, so that the boss 34 of the outer plug 31 is axially attached to the end face of the cylinder 1, the boss 34 of the inner plug 32 is axially attached to the step face of the stepped hole of the outer plug 31, and the end cover 33 is in threaded connection with the cylinder 1 or the outer plug 31.
The end plugs 21, the outer end plug 31 and the inner wall of the barrel 1 are all installed and sealed by adopting a sealing ring 24 and additionally installing check rings.
An installation space 35 for installing a humidity sensor or a moisture sensor is arranged between the inner plug 32 and the outer plug 31, and the installation space 35 is positioned at the outer end of the test piece 4. In the present embodiment, the groove is formed on the outer wall of the inner plug 32 to form the installation space 35, and the installation space 35 is located between the annular groove and the boss 34 of the inner plug 32. By installing a humidity sensor or a moisture sensor in the installation space 35 and detecting the humidity condition there, it is possible to determine whether the test piece 4 has failed in sealing.
Of course, the sealing performance test also comprises the following two modes: the fluorescent agent is added to the liquid medium introduced into the pressure chamber 10, and after the test is completed, the leak path can be detected by a fluorometer. The second method comprises the following steps: and installing a plurality of acoustic emission sensors, and detecting valve leakage by using an acoustic detector. Of course both of these approaches may be used simultaneously.
The invention only needs to change the diameter of the inner plug and the wall thickness of the outer plug aiming at sealing rings with different sizes, and has simple assembly and convenient use. The pressure chamber can provide a high-pressure environment for the performance test of the sealing ring, and the sealing performance of the sealing ring in the high-pressure environment can be tested.
The invention discloses a method for testing a high-pressure sealing ring, which utilizes the testing device for the high-pressure sealing ring to test and comprises the following steps;
s1, mounting the test piece 4 in the annular groove on the outer wall of the inner plug 32, sealing the inner plug 32 and the outer plug 31, and mounting a humidity sensor in the mounting space 35;
s2, injecting fluid medium into the cylinder 1 through the medium channel 22, maintaining the pressure for a certain time, and judging whether the sealing of the test piece 4 fails according to the detection data of the humidity sensor or the moisture sensor, so as to test the sealing performance of the test piece 4.
In the invention, the medium channel 22 is used as an external hydraulic source of an injection port. As shown in fig. 2, the external hydraulic source system of the present invention includes a pressure supply unit, a pressure chamber 10, a data acquisition and analysis unit, and a control unit 2, wherein the pressure supply unit is connected to the pressure chamber 10 through a pipeline to adjust the pressure in the pressure chamber 10; the data acquisition and analysis unit comprises a pressure sensor 14 and a temperature sensor 15, and the pressure supply unit and the data acquisition and analysis unit are both connected with the control unit 2. The control unit 2 comprises a computer host and a display terminal, and the display terminal adopts a touch screen and can display test data in real time and control the power unit in real time.
The pressure supply unit comprises a power supply system and an ultrahigh pressure pressurization system, the whole system can realize computer control, and can realize arbitrary output and controllability of 0-100MPa pressure. The ultrahigh pressure boosting system in the present embodiment is an ultrahigh pressure gas-drive boosting system, and includes a low pressure pump 12 and a high pressure pump 13.
The power supply system is a gas pressure supply system which is connected with the high-pressure pump 13 to provide driving force for the high-pressure pump 13, and the medium output by the low-pressure pump 12 is transmitted to the pressure chamber 10 after passing through the high-pressure pump 13. When high-pressure output is needed, the medium output by the low-pressure pump 12 is pressurized by the high-pressure pump 13 and then is conveyed to the pressure chamber 10.
The gas pressure supply system adopts an oil-free silent air compressor, can realize the pressure output of 0.1-0.8Mpa, and provides power for the ultrahigh pressure gas drive supercharging system. In the embodiment, one of the reference types is provided, namely model number WP1100-3/140, motor power 3600W and rotating speed 1400 r/min.
The output pressure of the ultrahigh pressure boosting system is in direct proportion to the driving pressure, and the gas consumption is small: 0.3-1m3/min, the output flow of the pump is 0.3L/min at high pressure, and the pressure test range is as follows: 0-200 MPa. The ultrahigh pressure pipeline adopts a high pressure steel pipe, and the pipeline seal adopts a ball head or conical surface hard seal.
The test fluid system and the driving fluid system are separated, and test media are diversified.
The data acquisition and analysis unit is used for realizing pressure monitoring, temperature monitoring and strain monitoring inside the pressure chamber 10. The data acquisition and analysis unit comprises various measuring elements and a data acquisition and analysis system. The measuring element includes a pressure sensor, a temperature sensor, and the like.
The pressure monitoring consists of two pressure monitoring paths, one path monitors the outlet pressure of the pump station, and the other path monitors the internal pressure of the pressure chamber 10. The pump station outlet pressure is monitored by mounting a pressure sensor 14 at the outlet of the pressure supply unit. The pressure inside the pressure chamber 10 is achieved by mounting a pressure sensor on the pressure chamber 10.
Of course, the system comprises monitoring software besides a hardware part, the monitoring software can realize the integrated display of the pressure data of the ultrahigh-pressure pressurization system and the pressure data inside the pressure cabin 10 on the same software platform, and can record the pressure change inside the pressure cabin 10 in real time.
The invention can test the sealing performance of the sealing ring under different pressures, and after the pressure maintaining is carried out for a specified time, the system carries out safe pressure relief, and the specified time of the pressure maintaining is set according to the experiment requirements.
In another embodiment, the liquid medium is heated during the test, and the sealing properties of the test piece 4 are tested at different temperatures. The heater may be disposed before the low pressure pump. The circumferential steam heat pipe, the resistance wire and the eddy heating system can be arranged outside the pressure chamber 2 for heating, and the water bath heating can also be adopted. And temperature monitoring is carried out by using a temperature measuring unit in the heating process.
The MWT202 integrated temperature transmitter can be selected as the temperature monitoring unit, the temperature monitoring unit is composed of a temperature sensor, a compensation circuit and a conversion circuit, and the temperature monitoring unit has the advantages of stable performance, high sensitivity, high reliability and the like.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.

Claims (10)

1. High pressure seal circle testing arrangement, its characterized in that: the pressure chamber comprises a cylinder body and a test piece mounting structure, wherein a medium channel communicated with the interior of the cylinder body is arranged at one end of the cylinder body, a coaxial first threaded hole is formed in the other end of the cylinder body, and the first threaded hole is communicated with the interior of the cylinder body;
the test piece mounting structure comprises an outer plug, an inner plug and an end cover, wherein the outer plug is in threaded connection with a first threaded hole of the barrel, a round hole matched with the inner plug is formed in the outer plug, and the round hole axially penetrates through the outer plug;
the inner plug is arranged in the round hole of the outer plug, and the outer wall of the inner plug is provided with an annular groove for mounting a test piece;
the outer end of the inner plug is provided with a boss; the end cover axially and tightly pushes the inner plug and the outer plug from the outer end, so that the boss of the inner plug is axially and tightly attached to the outer plug, and the end cover is in threaded connection with the barrel or the outer plug.
2. The high-pressure seal ring testing apparatus according to claim 1, wherein: the outer end part of the outer plug is provided with a boss, and the end cover enables the boss of the outer plug to be tightly attached to the barrel in the axial direction.
3. The high-pressure seal ring testing apparatus according to claim 1 or 2, wherein: the round hole of the outer plug is a stepped hole, and the boss of the inner plug is tightly attached to the stepped surface of the stepped hole through the end cover.
4. The high-pressure seal ring testing apparatus according to claim 1, wherein: the other end of the barrel is provided with a coaxial second threaded hole which is communicated with the inside of the barrel, a plug is arranged in the second threaded hole and is in threaded connection with the barrel, the medium channel is arranged on the plug, and the medium channel axially penetrates through the plug.
5. The high-pressure seal ring testing apparatus according to claim 4, wherein: the plug is also provided with a pressure sensor interface which is communicated with the inside of the cylinder body.
6. The high-pressure seal ring testing apparatus according to claim 4 or 5, wherein: a sealing ring is arranged between the plug and the barrel.
7. The high-pressure seal ring testing apparatus according to claim 1, wherein: an installation space for installing a humidity sensor is arranged between the inner plug and the outer plug, and the installation space is positioned at the outer end of the test piece.
8. The test method of the high-pressure sealing ring is characterized by comprising the following steps: testing with the high pressure seal ring testing apparatus of any of claims 1-7, comprising the steps of;
s1, mounting the test piece in the annular groove on the outer wall of the inner plug, mounting a humidity sensor between the outer wall of the inner plug and the inner wall of the outer plug, wherein the humidity sensor is positioned at the outer end of the test piece;
and S2, injecting a fluid medium into the cylinder through the medium channel, maintaining the pressure for a certain time, and testing the sealing performance of the test piece.
9. The test method of claim 8, wherein: and the medium channel is externally connected with a hydraulic source, the output pressure of the hydraulic source is changed, and the sealing performance of the test piece under different pressures is tested.
10. The test method according to claim 8 or 9, characterized in that: and heating the liquid medium, and testing the sealing performance of the test piece at different temperatures.
CN201911172622.1A 2019-11-26 2019-11-26 High-pressure sealing ring testing device and testing method Pending CN110823467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911172622.1A CN110823467A (en) 2019-11-26 2019-11-26 High-pressure sealing ring testing device and testing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911172622.1A CN110823467A (en) 2019-11-26 2019-11-26 High-pressure sealing ring testing device and testing method
PCT/CN2019/122338 WO2021103040A1 (en) 2019-11-26 2019-12-02 Testing apparatus and testing method for high-pressure sealing ring

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Publication Number Publication Date
CN110823467A true CN110823467A (en) 2020-02-21

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WO (1) WO2021103040A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112229788A (en) * 2020-12-16 2021-01-15 南京仪汇仪器设备有限公司 Corrosion-resistant sealing washer testing arrangement
CN112268820A (en) * 2020-09-17 2021-01-26 中国南方电网有限责任公司超高压输电公司检修试验中心 High-voltage bushing top sealing performance evaluation method

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US5000033A (en) * 1989-06-05 1991-03-19 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration O-ring gasket test fixture
CN204359496U (en) * 2014-12-01 2015-05-27 南车二七车辆有限公司 A kind of O-ring seal proving installation
CN106706220A (en) * 2017-01-12 2017-05-24 华南理工大学 Test device for sealing property of rubber O-shaped ring under high pressure hydrogen environment
CN109374221A (en) * 2018-12-10 2019-02-22 中国航发四川燃气涡轮研究院 It is a kind of for testing the experimental rig of metal stationary seal ring elevated-temperature seal performance
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112268820A (en) * 2020-09-17 2021-01-26 中国南方电网有限责任公司超高压输电公司检修试验中心 High-voltage bushing top sealing performance evaluation method
CN112229788A (en) * 2020-12-16 2021-01-15 南京仪汇仪器设备有限公司 Corrosion-resistant sealing washer testing arrangement
CN112229788B (en) * 2020-12-16 2021-04-23 南京仪汇仪器设备有限公司 Corrosion-resistant sealing washer testing arrangement

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