CN106918427A - A kind of experimental provision of real-time measurement oil sealing slip - Google Patents
A kind of experimental provision of real-time measurement oil sealing slip Download PDFInfo
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- CN106918427A CN106918427A CN201710293384.4A CN201710293384A CN106918427A CN 106918427 A CN106918427 A CN 106918427A CN 201710293384 A CN201710293384 A CN 201710293384A CN 106918427 A CN106918427 A CN 106918427A
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- oil
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- oil groove
- time measurement
- liquid collecting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/022—Test plugs for closing off the end of a pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
A kind of experimental provision of real-time measurement oil sealing slip, the top of rotating shaft is connected with drive device, and the bottom of rotating shaft is extended in the inner chamber of oil groove, and inner skirt on the side and oil groove inwall of rotating shaft bottom encloses the installation position of several tested oil sealings；Rotating shaft, tested oil sealing connect oil pocket by what the inner chamber of oil groove was separated into that oil pocket and bottom of the top for storing medium be used to accepting the medium revealed from oil pocket up and down.Oil pocket is connected with real-time measurement assembly, and lightweight buoy is provided with liquid collecting cavity, and metal mark is fixed with lightweight buoy；The open top of liquid collecting cavity is sealedly connected with sensor installation seat and current vortex sensor；The bottom opening of liquid collecting cavity is stretched catheter and is connected with oil pocket by side.Central controller is connected with current vortex sensor and drive device respectively.The present invention is popped one's head in and the micron order change in displacement between metal mark upper surface by current vortex sensor during measurement experiment, and then realizes the real-time measurement to being tested oil sealing slip.
Description
Technical field
The present invention relates to a kind of experimental provision of real-time measurement oil sealing slip.
Background technology
Oil sealing is a kind of contact seal part, and it is right to be realized by flexible rubber seal lip and the Interference contact of rotating shaft
The sealing of oil based media.
At present, the performance test to oil sealing mainly includes two aspects, and one kind is the profit in the case where having lubrication or DRY SLIDING
Tribology experiments are carried out to rubber oil sea material and metal couple with friction wear testing machine, rubbing for oil sealing material is mainly investigated
Wipe the tribological property parameters such as coefficient, wearability；Another kind is to utilize to simulate slip, lip of the working condition experimenting stand to oil sealing
The comprehensive sealing performance parameter such as temperature rise, radial load and friction torque is measured, and wherein slip is reflection oil sealing sealing
The key index of energy, it is particularly important to its accurate measurement.
The measurement of oil sealing slip is mainly at present leakage rate collection vessel is set in oil sealing atmospheric side, regulation when
It is interior to obtain slip by measuring volume or quality, and its measurement result is often not satisfactory, its reason is essentially consisted in：Its
One, because having certain magnitude of interference between oil sealing and rotary shaft, the medium leaked by oil seal lip is considerably less, in the short period
Inside be difficult to be collected into obvious leakage rate, only when running between long enough, can just measure the leaking medium of certain volume；Its
Two, the lubricating oil leaked out from oil sealing side medium is easily sticked to rotating shaft surface, sealing lip inwall and atmospheric side seal cavity
Inwall, with larger loss, causes the collection of leaking medium extremely difficult.
As can be seen here, it is difficult to measure its slip precisely in real time from oil seal lip atmospheric side.
The content of the invention
In order to overcome the shortcomings of existing oil sealing experimental provision be difficult in real time, accurate measurement oil sealing slip, the present invention carries
A kind of experimental provision for measuring oil sealing slip in real time from oil seal lip side medium is gone out.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of experimental provision of real-time measurement oil sealing slip, including for holding medium and installing the sealing of tested oil sealing
Device, the real-time measurement assembly for measuring slip indirectly from side medium and the central controller for controlling measurement process；
The sealing device includes the oil groove and the rotating shaft that are coaxially disposed, and the oil groove is erected on vertical mounting bracket, and oil
The open top of groove；The rotating shaft is vertically arranged, and the top of rotating shaft is connected with drive device, and the bottom of rotating shaft passes through the top of oil groove
Extend to oil groove central axis direction on portion opening and along extending in the inner chamber of oil groove, and side and the oil groove inwall of rotating shaft bottom
Inner skirt enclose the installation position of several tested oil sealings；Up and down be separated into for the inner chamber of oil groove by the rotating shaft, tested oil sealing
Top is used to store the oil pocket of medium and bottom is used to accepting the medium revealed from oil pocket and connects oil pocket, and the oil groove bottom sets
Have and connect the first through hole that oil pocket is connected, to discharge the medium connect in oil pocket；
The side of the oil pocket is connected with real-time measurement assembly, and the real-time measurement assembly stretches liquid collecting tank including side, institute
Stating side and stretching has liquid collecting cavity in liquid collecting tank, lightweight buoy is provided with liquid collecting cavity, and metal mark is fixed with lightweight buoy；Liquid collecting cavity
Open top be sealedly connected with sensor installation seat, sensor installation seat is provided with the displacement data for detecting metal mark
Current vortex sensor；The bottom opening of liquid collecting cavity is stretched catheter and is connected with oil pocket by side；
The central controller is connected with current vortex sensor and drive device respectively, and the central controller includes receiving
Device and calculator, current vortex sensor are used to detect real-time displacement data of the metal mark relative to current vortex sensor, and incite somebody to action
Described real-time displacement data is activation gives the receiver, and the real-time displacement data that receiver will be received are conveyed to calculating
Device, real-time displacement data of the calculator according to calculate the real time leak rate of oil sealing.
Further, the side is stretched catheter and is connected by drain pipe joint with oil pocket, in the damping of the drain pipe joint
Bore dia d<2mm.
Further, cooling water annular groove, the open top of the cooling water annular groove are provided with around the oil pocket in the oil groove
Sealed by gland, and gland is fixed on oil groove by screw, and the first sealing ring is provided between gland and oil groove；Cooling water ring
One end of groove is provided with cooling water inlet, and the other end is provided with coolant outlet, and cooling water inlet is connected with cooling water water source, cooling
Water out is connected with cooling water waste water tank.
Further, the oil groove is fixed on vertical mounting bracket by oil groove mounting seat, and oil groove and oil groove mounting seat it
Between be tightly connected by the second sealing ring；Oil groove mounting seat is provided with the second through hole connected with first through hole, described second
The import of through hole is connected with first through hole, and the outlet of second through hole exposes to the oil groove mounting seat, and the second through hole goes out
Mouthful be arranged right below measuring cup.
Further, the side wall of the liquid collecting cavity is provided with steam vent, and the steam vent be located at liquid collecting cavity highest liquid level line it
On.
Further, the drive device is motor, and motor is fixed on vertical mounting bracket by motor mount, motor
Output shaft is coaxially connected with rotating shaft, and motor is connected with central controller.
Further, the central shaft of liquid collecting tank is parallel with the central shaft of the oil groove.
Operation principle of the invention is：
Because the slip of oil sealing is general than relatively low, and sealing medium can be bonded at the sky of oil sealing from after oil seal lip leakage
The surfaces such as the inwall of gas side, rotating shaft and seal cavity, it is difficult to enough collections, cause the real―time precision measurment of oil sealing slip very
It is difficult.Therefore, can always there is larger error in traditional method in oil sealing air side measurement dielectric leakage rate, and be situated between in oil sealing
Real-time measurement of the matter side to dielectric leakage is then expected to solve the above problems.
Change by measuring displacement between current vortex sensor and metal mark of the invention, and then backstepping obtains oil sealing
Real time leak rate.The inner chamber of oil groove is divided into oil pocket and connects oil pocket by oil seal lip, and wherein sealing medium is located in oil pocket；Oil pocket
Side wall catheter, drain pipe joint stretched by side be connected with side and stretch liquid collecting tank, the side wall that liquid collecting tank is stretched in side is provided with steam vent, such as
It is concordant with the medium liquid level in oil pocket that this can ensure that the medium liquid level in liquid collecting tank is stretched in side；Adrift lightweight is floated for liquid collecting cavity top
Mark, metal mark is fixed on the upper surface of lightweight buoy；Current vortex sensor is fixed on side by sensor installation seat stretches liquid collecting
The top of tank.
In experimentation, when the medium in oil pocket is leaked, Jie in medium liquid level and liquid collecting cavity in oil pocket
Matter liquid level can decline, while the lightweight buoy and metal mark that float on above liquid collecting cavity also decline therewith；But due to oil sealing
Slip it is general very low, therefore in the short period of time, the decline displacement of above-mentioned medium liquid level is micron-sized, and metal mark
The change of micron order displacement can accurately be measured in real time by current vortex sensor between current vortex sensor probe.
Stirring can be formed to the sealing medium of oil pocket, in rotation process in view of rotating shaft so that its liquid level occurs significantly
Fluctuation, therefore the drain pipe joint with damping action is set between oil pocket and side stretch liquid collecting tank, by rationally design catheter
The internal diameter of joint damps diameter of bore d to realize the regulation and control to its damping, i.e. drain pipe joint<2mm, can reach reduction oil
Influence of the chamber medium liquid fluctuating to medium liquid level in liquid collecting cavity.
In oil pocket side, wall sets cooling water annular groove, by the circulation of cooling water in cooling water annular groove, so that will be close in oil pocket
The stirring heat and oil seal lip frictional heat for sealing medium are taken away rapidly, reach the purpose of stabilization oil pocket interior sealing medium temperature.Meanwhile,
Connect oil pocket outlet be arranged right below measuring cup, the leaking medium after oil sealing long time running can be collected, so as to obtain
Dielectric leakage amount in long period.
Patent of the present invention provides a kind of experimental provision of real-time measurement oil sealing slip, and compared with prior art, its is beneficial
Effect is：
(1) certainty of measurement of current vortex sensor is general within 1 μm, is capable of achieving the accurate measurement to micro-displacement；Together
When, the displacement signal that current vortex sensor is surveyed is convertible into voltage or current signal, and is transmitted to digital display by data collecting card
Instrument or computer real time record.Popped one's head in by real-time monitoring current vortex sensor the change of and metal mark between micron order displacement
Change, can precisely in real time measure oil sealing slip.
(2) cooling water annular groove is set up in annular seal space body sidewall, oil pocket interior sealing medium is constantly taken away using recirculated cooling water
Stirring heat and lip frictional heat, can realize sealing medium temperature in less scope by the flow velocity for changing recirculated cooling water
Fluctuation.
(3) dielectric leakage is measured in real time from oil sealing side medium, can overcome because leaking medium be difficult to it is enough collection and
Caused slip is difficult to the problem of real―time precision measurment.
(4) patent of the present invention is capable of achieving to tested oil sealing slip by the way of current vortex sensor and measuring cup combination
Real-time measurement and stipulated time internal leakage measurement, simple structure, it is easy in laboratory applications.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the sectional view of real-time measurement assembly；
Fig. 3 is the sectional arrangement drawing of oil groove, oil groove mounting seat and vertical mounting bracket.
Specific embodiment
Referring to the drawings, a kind of experimental provision of real-time measurement oil sealing slip, including for holding medium and installing tested
The sealing device of oil sealing, the real-time measurement assembly 1 for measuring slip indirectly from side medium and for controlling measurement process
Central controller 8；
The sealing device includes the oil groove 28 and the rotating shaft 4 that are coaxially disposed, and the oil groove 28 is erected at vertical mounting bracket 6
On, and oil groove 28 open top；The rotating shaft 4 is vertically arranged, and the top of rotating shaft 4 is connected with drive device 5, the bottom of rotating shaft 4
Hold open top through oil groove 28 and along the inner chamber for extending to oil groove 28, and the bottom of rotating shaft 4 side and the inwall of oil groove 28
On the inner skirt that extends to the central axis direction of oil groove 28 enclose the installation position of several tested oil sealings 3；It is the rotating shaft 4, tested
The inner chamber of oil groove 28 is separated into oil pocket and bottom of the top for storing medium 214 by oil sealing 3 up and down to be used to accept from oil pocket
The medium of leakage connects oil pocket 215, and the bottom of the oil groove 28 is provided with and connects the first through hole 210 that oil pocket 215 is connected, and is connect with discharging
Medium in oil pocket 215；
The side of the oil pocket is provided with oil discharge outlet 27, and the oil pocket is connected by oil discharge outlet 27 with real-time measurement assembly 1,
The real-time measurement assembly 1 stretches liquid collecting tank 13 including side, and the side is stretched has liquid collecting cavity in liquid collecting tank 13, is provided with light in liquid collecting cavity
Matter buoy 15, is fixed with metal mark 14 on lightweight buoy 15；The open top of liquid collecting cavity is sealedly connected with sensor installation seat
12, sensor installation seat 12 is provided with the current vortex sensor 11 of the displacement data for detecting metal mark 14；Liquid collecting cavity
Bottom opening is stretched catheter 16 and is connected with oil pocket by side；
The central controller 8 is connected with current vortex sensor 11 and drive device 5 respectively, and the central controller includes
Receiver 82 and calculator 81, current vortex sensor 11 are used to detect real-time displacement of the metal mark relative to current vortex sensor
Data, and give the receiver 82, and the real-time displacement number that receiver 82 will be received by described real-time displacement data is activation
According to calculator 81 is conveyed to, the calculator 81 calculates the real time leak rate of oil sealing according to described real-time displacement data.
The side is stretched catheter 16 and is connected by drain pipe joint 17 with oil pocket, the damping endoporus of the drain pipe joint 17
Diameter d<2mm.
Cooling water annular groove 24 is provided with around the oil pocket in the oil groove 28, the open top of the cooling water annular groove 24 is led to
Overpressure cap 21 is sealed, and gland 21 is fixed on oil groove 28 by screw 22, and the first sealing is provided between gland 21 and oil groove 28
Circle 23；One end of cooling water annular groove 24 is provided with cooling water inlet 25, and the other end is provided with coolant outlet 26, and cooling water inlet 25
Connected with cooling water water source, coolant outlet 26 is connected with cooling water waste water tank.
The oil groove 28 is fixed on vertical mounting bracket 6 by oil groove mounting seat 29, and oil groove 28 and oil groove mounting seat 29
Between be tightly connected by the second sealing ring 212；Oil groove mounting seat 29 is provided with the second through hole connected with first through hole 210
211, the import of second through hole 211 is connected with first through hole 210, and the outlet of second through hole 211 exposes to the oil
Groove mounting seat 29, and the second through hole 211 outlet be arranged right below measuring cup 7.
The side wall of the liquid collecting cavity is provided with steam vent 18, and the steam vent 18 is located on liquid collecting cavity highest liquid level line.
The drive device 5 is motor 51, and motor 51 is fixed on vertical mounting bracket 6 by motor mount 52, motor
Output shaft be coaxially connected with rotating shaft, and motor is connected with central controller.
The central shaft of liquid collecting tank 13 is parallel with the central shaft of the oil groove 28.
The receiver 82 is connected by displacement signal line 83 with current vortex sensor 11, by tach signal line 84 and electricity
Machine 51 is connected, the control with propagation controller 81 to controlled motor 51, including rotating speed, steering and start and stop.
The mounting seat 29 is fixed on vertical mounting bracket 6 by removable side plate 213.
The rotating shaft 4 includes hollow shaft 41, bearing block 42 and bearing 43, and the hollow shaft 41 is installed on axle by bearing 43
In bearing 42, the bearing block 42 is fixed on vertical mounting bracket 6 by screw.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Scope is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention is also and in art technology
Personnel according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (7)
1. it is a kind of it is real-time measurement oil sealing slip experimental provision, it is characterised in that：Including for holding medium and installing tested
The sealing device of oil sealing, the real-time measurement assembly for measuring slip indirectly from side medium and for controlling measurement process in
Centre controller；
The sealing device includes the oil groove and the rotating shaft that are coaxially disposed, and the oil groove is erected on vertical mounting bracket, and oil groove
Open top；The rotating shaft is vertically arranged, and the top of rotating shaft is connected with drive device, and the bottom of rotating shaft passes through opens at the top of oil groove
Mouthful and in extending to oil groove central axis direction along extending in the inner chamber of oil groove, and on side and the oil groove inwall of rotating shaft bottom
Shirt rim encloses the installation position of several tested oil sealings；The inner chamber of oil groove is separated into top by the rotating shaft, tested oil sealing up and down
What oil pocket and bottom for storing medium were used to accepting the medium revealed from oil pocket connects oil pocket, the oil groove bottom be provided with
The first through hole of oil pocket connection is connect, to discharge the medium connect in oil pocket；
The side of the oil pocket is connected with real-time measurement assembly, and the real-time measurement assembly stretches liquid collecting tank, the side including side
Stretching has liquid collecting cavity in liquid collecting tank, lightweight buoy is provided with liquid collecting cavity, and metal mark is fixed with lightweight buoy；The top of liquid collecting cavity
Portion opening is sealedly connected with sensor installation seat, and sensor installation seat is provided with the electricity of the displacement data for detecting metal mark
Eddy current sensor；The bottom opening of liquid collecting cavity is stretched catheter and is connected with oil pocket by side；
The central controller is connected with current vortex sensor and drive device respectively, the central controller include receiver and
Calculator, current vortex sensor is used to detect real-time displacement data of the metal mark relative to current vortex sensor, and incites somebody to action described
Real-time displacement data is activation give the receiver, and the real-time displacement data that receiver will be received are conveyed to calculator, institute
State the real time leak rate that real-time displacement data of the calculator according to calculate oil sealing.
2. the experimental provision of a kind of real-time measurement oil sealing slip as claimed in claim 1, it is characterised in that：Stretch and lead in the side
Liquid pipe is connected with oil pocket by drain pipe joint, the damping diameter of bore d of the drain pipe joint<2mm.
3. the experimental provision of a kind of real-time measurement oil sealing slip as claimed in claim 2, it is characterised in that：In the oil groove
Cooling water annular groove is provided with around the oil pocket, the open top of the cooling water annular groove is sealed by gland, and gland passes through spiral shell
Nail is fixed on oil groove, and the first sealing ring is provided between gland and oil groove；One end of cooling water annular groove is provided with cooling water inlet, separately
One end is provided with coolant outlet, and cooling water inlet is connected with cooling water water source, and coolant outlet is connected with cooling water waste water tank.
4. the experimental provision of a kind of real-time measurement oil sealing slip as claimed in claim 3, it is characterised in that：The oil groove leads to
Cross oil groove mounting seat to be fixed on vertical mounting bracket, and be tightly connected by the second sealing ring between oil groove and oil groove mounting seat；
Oil groove mounting seat is provided with the second through hole connected with first through hole, and the import of second through hole is connected with first through hole,
The outlet of second through hole exposes to the oil groove mounting seat, and the second through hole outlet is arranged right below measuring cup.
5. the experimental provision of a kind of real-time measurement oil sealing slip as claimed in claim 4, it is characterised in that：The liquid collecting cavity
Side wall be provided with steam vent, and the steam vent is located on liquid collecting cavity highest liquid level line.
6. the experimental provision of a kind of real-time measurement oil sealing slip as claimed in claim 5, it is characterised in that：It is described to drive dress
Motor is set to, motor is fixed on vertical mounting bracket by motor mount, and the output shaft of motor is coaxially connected with rotating shaft, and electricity
Machine is connected with central controller.
7. the experimental provision of a kind of real-time measurement oil sealing slip as claimed in claim 6, it is characterised in that：In liquid collecting tank
Heart axle is parallel with the central shaft of the oil groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710293384.4A CN106918427B (en) | 2017-04-28 | 2017-04-28 | Experimental device for real-time measurement oil blanket leakage rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710293384.4A CN106918427B (en) | 2017-04-28 | 2017-04-28 | Experimental device for real-time measurement oil blanket leakage rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106918427A true CN106918427A (en) | 2017-07-04 |
| CN106918427B CN106918427B (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710293384.4A Active CN106918427B (en) | 2017-04-28 | 2017-04-28 | Experimental device for real-time measurement oil blanket leakage rate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560842A (en) * | 2017-10-30 | 2018-01-09 | 张旭 | A kind of rubber seal bearing capacity Auto-Test System |
| CN108051144A (en) * | 2017-11-17 | 2018-05-18 | 安徽农业大学 | A kind of Sealing Performance of Oil Seal of artificial intelligence paddy field environment is test bed |
| CN111323223A (en) * | 2018-12-13 | 2020-06-23 | 湖南中车时代电动汽车股份有限公司 | Oil seal acceleration life testing device and method for new energy automobile |
| CN113775556A (en) * | 2021-08-20 | 2021-12-10 | 佛山市顺德区美的电子科技有限公司 | Rotor assembly, delivery pump, indoor unit, outdoor unit and air treatment equipment |
| WO2023115841A1 (en) * | 2021-12-23 | 2023-06-29 | 中国矿业大学 | Constant-pressure experiment based device and method for measuring valve leakage of pressure balance valve |
| CN116519220A (en) * | 2023-06-29 | 2023-08-01 | 太仓奥林吉汽车零部件有限公司 | Engine part tightness detector |
| CN116718361A (en) * | 2023-05-19 | 2023-09-08 | 江苏海洋大学 | Self-impact sealing experimental device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560842A (en) * | 2017-10-30 | 2018-01-09 | 张旭 | A kind of rubber seal bearing capacity Auto-Test System |
| CN107560842B (en) * | 2017-10-30 | 2019-03-22 | 鬼怒川橡塑（广州）有限公司 | A kind of rubber seal bearing capacity Auto-Test System |
| CN108051144A (en) * | 2017-11-17 | 2018-05-18 | 安徽农业大学 | A kind of Sealing Performance of Oil Seal of artificial intelligence paddy field environment is test bed |
| CN108051144B (en) * | 2017-11-17 | 2019-09-17 | 安徽农业大学 | A kind of Sealing Performance of Oil Seal of artificial intelligence paddy field environment is test bed |
| CN111323223A (en) * | 2018-12-13 | 2020-06-23 | 湖南中车时代电动汽车股份有限公司 | Oil seal acceleration life testing device and method for new energy automobile |
| CN111323223B (en) * | 2018-12-13 | 2022-03-15 | 湖南中车时代电动汽车股份有限公司 | Oil seal acceleration life testing device and method for new energy automobile |
| CN113775556A (en) * | 2021-08-20 | 2021-12-10 | 佛山市顺德区美的电子科技有限公司 | Rotor assembly, delivery pump, indoor unit, outdoor unit and air treatment equipment |
| WO2023115841A1 (en) * | 2021-12-23 | 2023-06-29 | 中国矿业大学 | Constant-pressure experiment based device and method for measuring valve leakage of pressure balance valve |
| CN116718361A (en) * | 2023-05-19 | 2023-09-08 | 江苏海洋大学 | Self-impact sealing experimental device |
| CN116519220A (en) * | 2023-06-29 | 2023-08-01 | 太仓奥林吉汽车零部件有限公司 | Engine part tightness detector |
| CN116519220B (en) * | 2023-06-29 | 2023-11-07 | 太仓奥林吉汽车零部件有限公司 | Engine part tightness detector |
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