CN114252257B - Dynamic sealing ring testing machine - Google Patents
Dynamic sealing ring testing machine Download PDFInfo
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- CN114252257B CN114252257B CN202111517917.5A CN202111517917A CN114252257B CN 114252257 B CN114252257 B CN 114252257B CN 202111517917 A CN202111517917 A CN 202111517917A CN 114252257 B CN114252257 B CN 114252257B
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- 238000012360 testing method Methods 0.000 title claims abstract description 113
- 238000007789 sealing Methods 0.000 title claims abstract description 44
- 238000004088 simulation Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a dynamic sealing ring testing machine, which comprises: the test part comprises a test inner ring and a test outer ring which are coaxially arranged with the main shaft, wherein the test inner ring and the test outer ring can rotate relative to the circumferential direction and move relative to the axial direction, an oil drainage gap is arranged between the inner rotating surface of the test outer ring and the outer rotating surface of the test inner ring, a dynamic seal ring mounting groove is formed in the oil drainage gap, and a first cavity and a second cavity are respectively arranged at two sides of the oil drainage gap; a power section including an oil pressure holding unit and a spindle driving unit; the sealing ring testing machine provided by the invention realizes axial sliding through the floating shaft, and the elastic component controls the axial sliding, so that the simulation of complex working conditions with axial sliding conditions under the condition of a real vehicle is realized, the coincidence degree of a test result and the running performance of the real vehicle is improved, and the effectiveness of the test result is improved.
Description
Technical Field
The invention relates to the field of dynamic sealing ring testing equipment, in particular to a dynamic sealing ring testing machine.
Background
The dynamic sealing ring is an annular sealing piece with an opening, is mainly applied to an automatic gearbox hydraulic module (AT, DCT, CVT, DHT and the like), is installed in a ring groove of a gearbox sleeve or a sleeve wall, the sleeve rotates together with a shaft, the sleeve can axially slide in the process of speed change, the dynamic sealing ring seals a gap between two oppositely moving rotating surfaces by virtue of elasticity of a gap after being pressed, the sealing effect is achieved, and the oil pressure in each cavity is ensured by controlling the oil leakage.
The working condition of the gearbox is complex, in order to detect the actual leakage quantity of the sealing ring under different working conditions (oil temperature, oil pressure and rotating speed), the quality of the sealing ring is ensured, the whole vehicle calibration is completed by an auxiliary main engine factory, and a test machine for completely simulating the actual running working condition of the sealing ring is required to be designed, namely, the relative sliding and the relative rotation of the sealing ring possibly occurring under the actual condition can be simulated. The patent of application 2020115335465 provides a testing machine for measuring the sealing performance of a sealing ring, but the device cannot completely simulate the working condition of a real vehicle, and particularly can only simulate the abrasion condition under the condition that only relative rotation is possible in the running process, and cannot simulate the axial movement in a gearbox.
Disclosure of Invention
The invention provides a sealing ring testing machine, which can not simulate the complex working condition that axial movement exists under the condition of a real vehicle in the existing sealing ring testing machine.
The technical scheme of the invention is as follows:
dynamic seal ring testing machine includes:
the test part comprises a test inner ring and a test outer ring which are coaxially arranged with the main shaft, wherein the test inner ring and the test outer ring can rotate relative to the circumferential direction and move relative to the axial direction, an oil drainage gap is arranged between the inner rotating surface of the test outer ring and the outer rotating surface of the test inner ring, a dynamic seal ring mounting groove is formed in the oil drainage gap, and a first cavity and a second cavity are respectively arranged at two sides of the oil drainage gap;
the power part comprises an oil pressure holding unit and a main shaft driving unit, the oil pressure holding unit is connected with the first inner cavity oil way, and the main shaft driving unit is used for driving the main shaft to rotate;
the control part comprises a main control unit, an execution unit and a measurement unit, wherein the main control unit is provided with a man-machine interaction interface, the measurement unit is used for measuring operation parameters of the test part and feeding back the operation parameters to the main control unit, and the execution unit is used for controlling the operation state of the test part according to an instruction of the main control unit.
Specifically, the main shaft is provided with a main shaft oil passage, and the main shaft oil passage is connected with the oil pressure holding unit and the first chamber.
Specifically, the test part is provided with a first end cover and a second end cover which are fixed on the main shaft, and the first end cover and the second end cover are connected through a shell to form an inner cavity.
Specifically, the test inner ring is arranged on the floating shaft, the floating shaft is arranged inside the inner cavity and can slide along the main shaft in the inner cavity, and the inner cavity is divided into a first cavity and a second cavity which are communicated only through the oil drainage gap.
Specifically, an elastic component is arranged between the floating shaft and the second end cover, and the elastic component is used for dynamically controlling the axial position of the floating shaft.
Preferably, the dynamic seal ring mounting groove is formed on the outer rotating surface of the test inner ring.
Preferably, the second inner cavity is further provided with an oil drain hole, and the test portion is further provided with an oil collecting disc for collecting test oil drained from the oil drain hole.
Specifically, the working oil temperature adjusting range is room temperature-150 ℃, the working oil pressure adjusting range is 0-7 MPa, and the working rotating speed adjusting range is-10000 RPM.
According to the sealing ring testing machine, the axial sliding is realized through the floating shaft which is arranged and can axially slide along the main shaft and simultaneously ensure the sealing of the sliding surface, and the axial sliding movement is controlled through the balance action of the elastic component and the oil pressure, so that the simulation of the complex working condition that the sealing ring under the condition of the real vehicle has the axial sliding condition is realized, the coincidence degree of the test result and the running performance of the real vehicle is further improved, and the effectiveness of the test result is improved.
Drawings
FIG. 1 is a schematic overall construction of the present invention;
FIG. 2 is a schematic view of an axial cutaway of a test section of the present invention;
FIG. 3 is a front cross-sectional view of a test section of the present invention;
FIG. 4 is an enlarged view of a portion of the test section of the present invention at A in FIG. 3;
FIG. 5 is a schematic view showing the mounting of the test section on the stand according to the present invention;
FIG. 6 is a schematic diagram of the hydraulic circuit of the present invention;
fig. 7 is a schematic diagram of a control unit according to the present invention.
In the figure:
1 a test section; 2 a power part; 3 a control part; 4, a bench;
11 main shaft; 12 a first end cap; 13 a second end cap; 14 a housing; 15 testing the outer ring; 16 floating shafts;
17 testing the inner ring; 18 spring seats; a spring assembly 19;
a spindle drive unit (spindle motor); 22 oil pressure holding units (hydraulic pumps);
31 a main control unit; 32 execution units; 33 a measurement unit;
311 a control module; 312 a human-computer interaction interface; 321 controller; 322 control the switch;
331 a photosensor; 332 temperature sensor; 41 oil collecting tray; 42 oil collecting cover;
a1 a first sealing ring; a2 a second sealing ring; a3, a third sealing ring; a FT1 floating mechanism;
c1 is a cylindrical surface; s1, a sliding surface; a CA1 lumen; IA1 first chamber; an IA2 second chamber;
p1 main shaft oil duct; h1 oil drain hole; an L1 belt; g1 oil drainage gap; g2 mounting slots;
an OL equipment oil circuit; an OL1 tank; an OL2 heater; an OL3 overflow valve; OL4 three-way flow control valve;
OL5 pressure gauge; an OL6 pressure sensor; OL7 throttle valve; OL8 two-position three-way valve;
an OL9 cooler; an IS1 inner rotation surface; an ES1 outer surface of revolution; an H2 oil drain hole; r1 dynamic seal ring.
Detailed Description
The present invention will be described in detail below with reference to the drawings and the specific embodiments, and in the present specification, the dimensional proportion of the drawings does not represent the actual dimensional proportion, but only represents the relative positional relationship and connection relationship between the components, and the components with the same names or the same reference numerals represent similar or identical structures, and are limited to the schematic purposes.
The whole structure of the invention is as shown in figure 1, the test part 1 is horizontally arranged on a rack 4; the main shaft driving unit 21 of the power part 2 is a main shaft motor arranged in the rack, the oil pressure maintaining unit 22 of the power part is a hydraulic pump, and the hydraulic pump 22 is connected with the equipment oil path OL; the control section 3 includes a main control unit 31, an execution unit 32, and a measurement unit 33.
An isometric view of a test portion 1 of example 1 of the dynamic seal ring testing machine of the present invention is shown in fig. 2, fig. 3 is a front cross-sectional view thereof, and fig. 4 is a partially enlarged view of a position a in fig. 3.
The test part 1 is horizontally placed on the bench 4, the spindle motor 21 installed inside the bench drives the spindle 11 of the test part 1 to rotate through the crawler, the spindle 11 is hollow, and the hollow part is connected in the oil path OL. The test part 1 is provided with a first end cover 12 and a second end cover 13 on a main shaft 11, the first end cover 12 and the second end cover 13 are connected through a shell 14, the first end cover 12 and the main shaft 11 are connected in a sealing way through a first sealing ring A1, and the first end cover 12 and the shell 14 and the second end cover 13 and the shell 14 are sealed through sealing gaskets. Inside the housing is mounted a test outer ring 15 coaxially with the spindle.
The main shaft 11, the first end cap 12, the second end cap 13 and the housing 14 form an inner cavity CA1, and the floating mechanism FT1 is integrated in the inner cavity CA 1. The floating mechanism FT1 includes a floating shaft 16 coaxially arranged with the main shaft 11 and sleeved outside the main shaft 11, and one end of the floating shaft 16 near the second end cover 13 is sleeved on the cylindrical surface C1 of the second end cover 13 protruding toward the inner cavity, so that the floating shaft 16 can relatively slide on the shaft section of the main shaft 11 exposed in the inner cavity CA 1. In the relative sliding, the second sealing ring A2 arranged on the sliding surface S1 between the floating shaft 16 and the main shaft 11 is used for sealing, and the third sealing ring A3 arranged on the cylindrical surface C1 between the floating shaft 16 and the second end cover 13 is used for sealing. The part of the main shaft 11 between the floating shaft 16 and the second end cover 13 is sleeved with a spring assembly 19 and a spring seat 18 matched with the spring assembly, and the spring assembly and the spring seat can be replaced by other elastic assemblies.
A test inner ring 17 IS coaxially mounted on the floating shaft 16, the test inner ring 17 IS located in the inner ring of the test outer ring 15, and a drain gap G1 IS formed between the outer rotation surface ES1 of the test inner ring 17 and the inner rotation surface IS1 of the test outer ring 15, as shown in a partial enlarged view in fig. 4. In this embodiment, a mounting groove G2 is formed on the outer rotating surface ES1 of the test inner ring 17, and the mounting groove is used for mounting the dynamic seal ring R1 to be tested. After the dynamic seal ring R1 to be tested is installed, the dynamic seal ring R1 divides the drain gap G1 into two parts, and further divides the inner cavity CA1 into a first chamber IA1 and a second chamber IA2.
The main shaft 11 is hollow to form a through main shaft oil passage P1, the main shaft oil passage is connected to the equipment oil passage OL, and the first chamber IA1 is connected to the main shaft oil passage P1 through an inner cavity oil inlet pipe provided on the first end cover 12. When the test is performed, the first chamber IA1 is filled with oil, the oil pressure in the oil passage OL of the device is adjusted, and the floating mechanism FT1 slides along the main shaft under the combined action of the oil pressure on one side and the spring assembly 19 on the other side until a new balance position is reached. Axial relative sliding occurs between the test inner ring 17 and the test outer ring 15 mounted on the floating mechanism FT1, so that axial movement of the dynamic seal ring under real vehicle conditions is simulated by the axial relative sliding between the test inner ring 17 and the test outer ring 15 when the oil pressure is changed. Four oil drain holes H1 are uniformly formed in the second end cover in the circumferential direction, and test oil leaked from the first cavity IA1 to the second cavity IA2 through the oil drain gap G1 is thrown out through the oil drain holes H1.
Fig. 5 is a schematic view showing the installation of the test part of the present invention on the stand 4, wherein the stand below the test part is provided with an oil collecting disc 41 for storing the test oil thrown out, the lowest end of the oil collecting disc is provided with an oil drain hole H2 for discharging the test oil, an oil collecting cover 42 for covering the test part 1 is installed above the oil collecting disc 41, and the inner surface of the oil collecting cover 42 intercepts the test oil thrown out from the oil drain hole H1 of the second end cover 13 and naturally drops into the oil collecting disc 41 due to gravity.
As described above, the dynamic seal ring testing machine of the present invention includes the spindle motor 21 for driving the spindle 11 of the testing unit 1 to rotate, and the hydraulic pump 22 for maintaining the oil pressure of the equipment oil line OL. As shown in fig. 5, a motor 21 is installed in the installation rack 4 of the test part 1, and is connected with the main shaft 11 by a belt L1 transmission and drives the main shaft 11 to rotate. The hydraulic pump 22 is provided separately from the test section 1 and connected to the test section through an equipment oil passage OL.
Fig. 6 is a hydraulic schematic diagram of the oil passage OL of the apparatus according to the present invention, wherein test oil is pumped out from the oil tank OL1 by the hydraulic pump 22, enters the main shaft oil passage P1 through the pipe, and flows out through the main shaft oil passage P1 to return to the oil tank OL1 again. An relief valve OL3 is first provided on the oil path between the hydraulic pump 22 and the main shaft oil path P1 to control the pressure of the overall equipment oil path OL within a working range. A three-way flow control valve OL4 is arranged in front of the oil inlet end of the main shaft pipeline P1, and the oil return end of the three-way flow control valve OL is connected to the oil tank OL1 to control inflow flow; a throttle valve OL7 is arranged behind the oil outlet end of the main shaft pipeline P1 to control the outflow flow. The three-way flow control valve OL4 cooperates with the throttle valve OL7 to realize oil pressure adjustment in the main shaft oil passage P1. Between the three-way flow control valve OL4 and the main shaft oil passage P1, a pressure gauge OL5 and a pressure sensor OL6 are simultaneously provided for measuring the oil pressure in the main shaft oil passage P1, and the pressure sensor OL6 is connected to the control part 3. The heater OL2 is arranged between the oil tank OL1 and the hydraulic pump 22, and is used for heating test oil according to test requirements, the two-position three-way valve OL8 is arranged at the rear end of the throttle valve OL7 and in front of the oil tank OL1, the normally open position of the two-position three-way valve OL1 is directly connected with the oil tank OL1, and the normally closed position of the two-position three-way valve is connected with the oil tank OL1 after passing through the cooler OL 9.
As shown in the device block diagram of fig. 7, the control unit 3 of the present invention includes a main control unit 31, an execution unit 32, and a measurement unit 33. The control module 311 of the main control unit is integrated in an electric control cabinet, and the front surface is a man-machine interaction interface 312, and the interface is provided with running time, rotating speed, oil temperature, oil pressure display, equipment running control buttons and test parameter adjustment and setting buttons. And the main control unit controls the execution unit to stabilize the control parameters within a set range according to the test setting and the data fed back by the measurement unit. The execution unit electrically connected with the main control unit comprises: the heater OL2 for adjusting the oil temperature according to the test requirement, the controller 321 for controlling the rotating speed and the rotating direction of the spindle motor 21, and the hydraulic pump start-stop control switch 322, the measuring unit electrically connected with the main control unit comprises a photoelectric sensor 331 installed on the main shaft for measuring the rotating speed of the main shaft, a temperature sensor 332 in the oil path OL for measuring the oil temperature, and a pressure sensor OL6 in the oil path P1 for measuring the main shaft.
The device can simulate different operation conditions under static and dynamic conditions, and test the sealing performance of the dynamic sealing ring. During static test, the oil pressure of the main shaft oil duct P1 is controlled to be stable, and under the balance condition, the floating shaft FT1 is relatively static in the inner cavity CA1 and is in a quasi-static working condition, and the oil leakage amount per unit time under the oil temperature and oil pressure working condition set in a test is calculated by measuring the oil leakage amount collected from the oil drain hole H2 of the oil collecting disc 41, so that the sealing performance of the dynamic sealing ring is represented. During dynamic test, the oil pressure of the main shaft oil duct P1 is controlled by manually adjusting the three-way flow control valve OL3 and the throttle valve OL7 to be changed in a step mode according to test setting, when the oil pressure is changed, the original balance state is broken, and the floating shaft FT1 slides along the main shaft under the combined action of the oil pressure in the first cavity IA1 and the spring assembly 19 until new balance is achieved. The dynamic sealing performance of the dynamic sealing ring is characterized by testing the total oil leakage amount collected from the oil drain hole H2 of the oil collecting disc 41 in the test time under a given pressure step curve, wherein the working oil temperature adjusting range designed by the dynamic sealing ring testing machine is room temperature-150 ℃, the working oil pressure adjusting range is 0-7 MPa, and the working rotating speed adjusting range is-10000 RPM.
In the dynamic seal ring testing machine of the present invention, the mounting groove G2 on the outer surface ES1 of the test inner ring 17 may be formed on the inner surface IS1 of the test outer ring 15 instead of the mounting groove G in the embodiment 1. The dynamic sealing ring testing machine is used for simulating the operation condition of the dynamic sealing ring on the real vehicle, so that the dynamic sealing ring mounting groove is arranged on the test inner ring or the test outer ring and depends on the mounting position of the dynamic sealing ring on the real vehicle. Meanwhile, the three-way flow control valve OL3 is replaced by an electromagnetic flow valve controlled by a main control unit of the control part, the flow of the main shaft oil duct is controlled through the electromagnetic flow valve, and the oil pressure in the main shaft oil duct can be automatically controlled by combining the feedback of an oil pressure sensor.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and various modifications and improvements made by those skilled in the art to which the invention pertains will fall within the scope of the invention as defined by the appended claims without departing from the spirit of the invention.
Claims (6)
1. The dynamic sealing ring testing machine comprises a power part (2) and a control part (3), and is characterized by further comprising: the test part (1) comprises a test inner ring (17) and a test outer ring (15) which are coaxially arranged with the main shaft (11), wherein the test inner ring and the test outer ring can rotate relatively circumferentially and move relatively axially, a drain gap (G1) IS formed between an inner rotating surface (IS 1) of the test outer ring (15) and an outer rotating surface (ES 1) of the test inner ring (17), a mounting groove (G2) of a dynamic sealing ring IS formed in the drain gap, and a first cavity (IA 1) and a second cavity (IA 2) are respectively arranged at two sides of the drain gap (G1);
the test part (1) is provided with a first end cover (12) and a second end cover (13) which are fixed on the main shaft (11), and the first end cover and the second end cover are connected through a shell (14) to form an inner cavity (CA 1);
the test inner ring (17) is arranged on a floating shaft (16) which is arranged in the inner cavity (CA 1); the floating shaft (16) can slide along the main shaft (11) in the inner cavity (CA 1); the floating shaft (16) and the test inner ring (17) divide the inner cavity (CA 1) into the first chamber (IA 1) and the second chamber (IA 2) which are communicated only through the oil drainage gap (G1).
2. The dynamic seal ring testing machine according to claim 1, further comprising an oil pressure holding unit (22), wherein the spindle (11) is provided with a spindle oil passage (P1) connecting the oil pressure holding unit (22) with the first chamber (IA 1).
3. The dynamic seal ring testing machine according to claim 1, wherein an elastic assembly is arranged between the floating shaft (16) and the second end cap (13), the elastic assembly being used for dynamically controlling the axial position of the floating shaft (16).
4. The dynamic seal ring testing machine according to claim 1, characterized in that the mounting groove (G2) is open on the outer surface of revolution (ES 1) of the test inner ring (17).
5. The dynamic seal ring testing machine according to claim 1, wherein the second chamber (IA 2) is further provided with an oil drain hole (H1), and the testing portion (1) is further provided with an oil collecting pan (41) and an oil collecting cover (42) for collecting test oil drained from the oil drain hole.
6. The dynamic seal ring testing machine according to any one of claims 1 to 5, wherein the operating oil temperature adjustment range is from room temperature to 150 ℃, the operating oil pressure adjustment range is from 0 to 7MPa, and the operating rotational speed adjustment range is from-10000 to 10000RPM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517917.5A CN114252257B (en) | 2021-12-13 | 2021-12-13 | Dynamic sealing ring testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517917.5A CN114252257B (en) | 2021-12-13 | 2021-12-13 | Dynamic sealing ring testing machine |
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| Publication Number | Publication Date |
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| CN114252257A CN114252257A (en) | 2022-03-29 |
| CN114252257B true CN114252257B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111517917.5A Active CN114252257B (en) | 2021-12-13 | 2021-12-13 | Dynamic sealing ring testing machine |
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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 |
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| CN103148998A (en) * | 2013-02-04 | 2013-06-12 | 北京理工大学 | Automotive rotary sealing ring testing device |
| CN107631878A (en) * | 2017-10-17 | 2018-01-26 | 苏州苏净船用机械有限公司 | A kind of detection device of sealing test |
| CN207763951U (en) * | 2018-01-05 | 2018-08-24 | 重庆齿轮箱有限责任公司 | A kind of outside framework oil seal simulation test device |
| CN208751857U (en) * | 2018-08-16 | 2019-04-16 | 中国石油化工股份有限公司 | A kind of Glais ring fatigue property test device |
| CN110567705A (en) * | 2019-07-26 | 2019-12-13 | 中国北方车辆研究所 | Distribution friction pair performance simulation test device based on floating disc |
| CN112683523A (en) * | 2020-12-22 | 2021-04-20 | 安庆帝伯功能塑料有限公司 | Dynamic sealing ring testing machine |
| CN214583828U (en) * | 2021-05-07 | 2021-11-02 | 西安凯德液压机电有限责任公司 | Rotary dynamic sealing performance test device |
-
2021
- 2021-12-13 CN CN202111517917.5A patent/CN114252257B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102928177A (en) * | 2012-10-29 | 2013-02-13 | 长城汽车股份有限公司 | Testing bed for testing rectangular sealing rings |
| CN103148998A (en) * | 2013-02-04 | 2013-06-12 | 北京理工大学 | Automotive rotary sealing ring testing device |
| CN107631878A (en) * | 2017-10-17 | 2018-01-26 | 苏州苏净船用机械有限公司 | A kind of detection device of sealing test |
| CN207763951U (en) * | 2018-01-05 | 2018-08-24 | 重庆齿轮箱有限责任公司 | A kind of outside framework oil seal simulation test device |
| CN208751857U (en) * | 2018-08-16 | 2019-04-16 | 中国石油化工股份有限公司 | A kind of Glais ring fatigue property test device |
| CN110567705A (en) * | 2019-07-26 | 2019-12-13 | 中国北方车辆研究所 | Distribution friction pair performance simulation test device based on floating disc |
| CN112683523A (en) * | 2020-12-22 | 2021-04-20 | 安庆帝伯功能塑料有限公司 | Dynamic sealing ring testing machine |
| CN214583828U (en) * | 2021-05-07 | 2021-11-02 | 西安凯德液压机电有限责任公司 | Rotary dynamic sealing performance test device |
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| CN114252257A (en) | 2022-03-29 |
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