CN206618538U - Rubber o-ring sealing property testing equipment under high pressure hydrogen environment - Google Patents
Rubber o-ring sealing property testing equipment under high pressure hydrogen environment Download PDFInfo
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- CN206618538U CN206618538U CN201720032306.4U CN201720032306U CN206618538U CN 206618538 U CN206618538 U CN 206618538U CN 201720032306 U CN201720032306 U CN 201720032306U CN 206618538 U CN206618538 U CN 206618538U
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- gland
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Abstract
The utility model discloses rubber o-ring sealing property testing equipment under a kind of high pressure hydrogen environment, mainly including rubber o-ring to be measured, gland, signal processor, containment vessel, screw, bleed outlet, beam type pressure sensor, hydrogen sensor, transmission rod, sealing O-ring, pressure ring, base, import/exhaust mouth, packing ring, inner bolt and male screw thread；The pressure ring is hollow circular ring structure, experiment cavity is constituted between the gland and base, and realize sealing by rubber o-ring to be measured；The base is opened upper end, the cylinder of bottom closing, and the bottom center of base, which is provided with import/exhaust mouthful, to be used for the air inlet of test gas and release.The utility model can realize the measurement of sealing contact stress and hydrogen gas leakage amount of the rubber o-ring under hydrogen gas environment, and can carry out the seal with O ring performance test of different compression ratios, have the advantages that easy to operate, economic and reliable.
Description
Technical field
The utility model belongs to mechanical structure sealing property test equipment development field, more particularly to a kind of high pressure hydrogen environment
Lower rubber o-ring sealing property testing equipment.
Background technology
Hydrogen Energy is new century important secondary energy sources, and high-pressure hydrogen storing system has turned into what countries in the world Hydrogen Energy industrialization was promoted
Emphasis.Rubber seal is the indispensable important component of high pressure hydrogen system, but its long-term work is in high pressure, high purity hydrogen
Easily occur hydrogen-induced damage under environment and cause leakage failure, seriously jeopardize system safety or even trigger disaster.To ensure high pressure
Permanent, the reliability service of hydrogen system rubber sealing structure, it is necessary to the sealing under hydrogen gas environment is sealed in rubber o-ring
It can be tested and be assessed.
Current generally accepted rubber o-ring sealing theory points out that the sealed basic functional principle of rubber o-ring is：It is logical
Cross make rubber o-ring occur elastic deformation so that contact stress is produced on sealing contact surface, make its be close to by sealing surface simultaneously
All microscopic concavities of sealing surface are squeezed into, the blocking band of closing is formed；Max.contact stress on sealing surface, which is more than, to be sealed
The pressure of medium, then leakage cannot be formed, on the contrary fluid can then enter gap between seal and sealing surface and cause because
Leaked caused by the separation of surface.Therefore Max.contact stress and leakage rate are the emphasis of rubber o-ring sealing property test concern.
However, existing test equipment sample installs cumbersome time-consuming, and lack economic, reliable contact stress measurements knot
Structure, or even contact stress measurements point easily cause test crash as leakage point；Lack the tune to rubber o-ring compression ratio simultaneously
Function is saved, causes same equipment to be only capable of for fixed sealed groove parameter.Rubber o-ring seal work under high pressure hydrogen environment
When making, hydrogen density little Yi leakages have higher requirements to contact stress measurements structure.In addition, hydrogen can also be dissolved into RUBBER O shape
Cause rubber swelling in circle, it is therefore desirable to develop a set of sealing property testing equipment using hydrogen as test(ing) medium, the device is needed
Can be achieved a butt joint the measurement of tactile stress and the big key parameter of leakage rate two, and possessed compression ratio and be can adjust function to test rubber
Inhale influence of the hydrogen-expansion to sealing property.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, proposes that a kind of installation is simple, economical
Rubber o-ring sealing property testing equipment under reliable high pressure hydrogen environment, can realize sealing contact stress and leakage rate has
Effect is determined；Sealed groove parameter can be adjusted again, realize the test of rubber o-ring sealing property of different compression ratios to investigate suction hydrogen
The influence of expansion.
In order to solve the above technical problems, solution of the present utility model is as follows.
Rubber o-ring sealing property testing equipment under a kind of high pressure hydrogen environment, it includes rubber o-ring to be measured, gland, guarantor
Protective case, screw, bleed outlet, beam type pressure sensor, hydrogen sensor, transmission rod, sealing O-ring, pressure ring, base, enter/arrange
Gas port, packing ring, inner bolt and male screw thread, wherein：
The pressure ring is hollow circular ring structure, and its inner side is made up of smooth section and internal thread segment, smooth section and internal thread
Section joint is expansion shape ledge structure；
The base is opened upper end, the cylinder of bottom closing, and the bottom center of base, which is provided with import/exhaust mouthful, to be used to test
The air inlet of gas and release；
Three portions of external thread section of gland boss successively including upper end section, middle smooth cylindrical section and lower end
Position：Constituting sealed groove between boss section, smooth cylindrical section and the base and the pressure ring is used to install RUBBER O to be measured
Shape circle；The upper surface of boss section is provided with screwed hole, and outer rim position is provided with the upper center position of a through hole and the sealed groove
Put and connect；Smooth cylindrical section is recessed shape ledge structure, the expansion of the recessed shape ledge structure and pressure ring with external thread section joint
Big shape ledge structure is engaged for mounting gasket；External thread section is engaged composition screw thread with the internal thread segment of the pressure ring and connected
Connect；The packing ring is hollow torus, is engaged with pressure ring for controlling the sealed groove residing for above-mentioned rubber o-ring to be measured
Axial depth；
Experiment cavity is constituted between the gland and base, and sealing is realized by rubber o-ring to be measured, and by interior
Screw is realized and is connected；The beam type pressure sensor is fixed on gland；The transmission rod is used for RUBBER O to be measured
The power that shape circle is produced after being squeezed passes to beam type pressure sensor；The containment vessel constitutes sealed protection with base
Cavity, containment vessel is used to monitor the gas content for leaking into protection cavity from experiment cavity, containment vessel in real time provided with hydrogen sensor
Also it is provided with the bleed outlet for gas in protection cavity of releasing.
Further, the left side of the beam type pressure sensor is provided with smooth bore, and right side is provided with screwed hole；It is described
Screw, which passes through the smooth bore of beam type pressure sensor and stretched into the screwed hole of the boss section of gland, is used for cantilever mounted
Beam type pressure sensor.
Further, the test device also includes signal processor, and the signal processor passes through signal wire and cantilever
Beam type pressure sensor, which is connected, realizes the acquisition process of contact stress signal.
Further, the transmission rod includes protuberance, three positions of thread segment and smooth section successively：Protuberance is hexagonal
Boss is closed as the retaining part for installing the part, the corresponding threaded holes of thread segment and beam type pressure sensor, smooth section
Through hole through the boss section of gland extend into the upper surface of rubber o-ring to be measured, and maintains an equal level with sealed groove upper surface.
Further, the containment vessel is closed upper part, the cylinder of lower open, and constitutes protection cavity with base, is led to
Cross sealing O-ring and realize sealing, and be connected by male screw thread realization；The right side of containment vessel is used for real provided with hydrogen sensor
When monitoring the gas content of protection cavity is leaked into from experiment cavity, bleed outlet is then provided with the upper end center of containment vessel to be used to let out
The gas in protection cavity is put, the lower surface of containment vessel is used to install sealing O-ring provided with rectangular recess.
Further, a diameter of 1mm of the through hole of the boss section of the gland, and the through hole center line through to be measured
The section center of circle of rubber o-ring.
Further, a diameter of of the smooth section of the transmission rod is not more than 0.6mm.
Further, the upper surface of the base gland and containment vessel adjacent provided with boss be used for base and gland,
Installation positioning between base and containment vessel.
Further, the beam type pressure sensor is used as strain measurement element using resistant to hydrogen foil gauge.
Compared with prior art, the beneficial effects of the utility model are：
1. the utility model provides a kind of simple, economic, reliable contact stress measurements structure, and the structure is set
On the non-primary sealing area of sealed groove（That is offside of the O-ring by gas squeezing action side）, it is to avoid to primary sealing area（That is O
Sides adjacent of the shape circle by gas squeezing action side）Damage, effectively prevent test gas and let out at contact stress measurements structure
Test failure caused by leakage.
2. the utility model effectively reduces rubber o-ring installation difficulty to be measured and the possibility of damage.Traditional sealing ditch
Groove is integral type rectangular recess structure（The pressure ring in the utility model and gland are fixed as one）, install and change O-ring
When O-ring to the size bigger than pressure ring external diameter can need to be inserted in sealed groove by the internal diameter distending of O-ring, this process O shapes
Larger stretcher strain and upset deformation will occur simultaneously or scraping is moved down for circle, easily cause the damage of O-ring.This practicality is new
Two parts of gland and pressure ring for constituting sealed groove structure are set to demountable structure by type, and without swelling, O-ring can be light
Pine nut is now installed, and the difficulty for reducing O-ring installation process decreases the possibility that rubber damage occurs in installation process.
3. the utility model can be conveniently adjusted the axial depth of sealed groove by changing the packing ring of different-thickness, or
Person can also realize the non-stepped continuous of sealed groove axial depth by adjusting the threaded engagement degree between pressure ring and gland
Regulation, can carry out the O-ring test of different compression ratios, realize the simple regulation and control of rubber o-ring compression ratio to be measured.
Brief description of the drawings
Fig. 1 is rubber o-ring sealing property testing equipment general structure under the high pressure hydrogen environment in the utility model example
Schematic diagram.
Each several part is described as follows in figure：Rubber o-ring 1 to be measured, gland 2, signal processor 3, containment vessel 4, screw 5, let out
Put mouth 6, beam type pressure sensor 7, hydrogen sensor 8, transmission rod 9, sealing O-ring 10, pressure ring 11, base 12, import/exhaust
Mouth 13, packing ring 14, inner bolt 15 and male screw thread 16.
Embodiment
Embodiment of the present utility model is illustrated by below in conjunction with the accompanying drawings, but implementation of the present utility model and guarantor
Protect not limited to this.
As shown in figure 1, rubber o-ring sealing property testing equipment under high pressure hydrogen environment, including rubber o-ring to be measured 1, pressure
Lid 2, signal processor 3, containment vessel 4, screw 5, bleed outlet 6, beam type pressure sensor 7, hydrogen sensor 8, transmission rod 9,
Sealing O-ring 10, pressure ring 11, base 12, import/exhaust mouthful 13, packing ring 14, inner bolt 15 and male screw thread 16.The pressure ring 11 is
Hollow circular ring structure, its inner side is made up of smooth section and internal thread segment, and smooth section is expansion shape platform with internal thread segment joint
Stage structure；The base 12 is opened upper end, the cylinder of bottom closing, and the bottom center of base 12 is provided with import/exhaust mouthful 13 and used
In test gas（Hydrogen）Air inlet and release；The gland 2 successively the boss section including upper end, middle smooth cylindrical section and
Three positions of external thread section of lower end：Constituted between boss section, smooth cylindrical section and the base 12 and the pressure ring 11 4
Sealed groove is used to install rubber o-ring 1 to be measured, and the upper surface of boss section is provided with screwed hole, and the outer rim position of boss section is provided with
One through hole connects with the upper center position of the sealed groove, and smooth cylindrical section is recessed shape platform with external thread section joint
Stage structure, the recessed shape ledge structure is engaged for mounting gasket 14, external thread section with the expansion shape ledge structure of pressure ring 11
Composition threaded connection is engaged with the internal thread segment of the pressure ring 11；The packing ring 14 is hollow torus, is matched somebody with somebody with pressure ring 11
Share in the axial depth for controlling the sealed groove residing for above-mentioned rubber o-ring 1 to be measured；Structure between the gland 2 and base 12
Sealing is realized into experiment cavity, and by rubber o-ring 1 to be measured, and is connected by the realization of inner bolt 15；The cantilever
The left side of beam type pressure sensor 7 is provided with smooth bore, and right side is provided with screwed hole；The screw 5 is passed through beam type pressure
The smooth bore of sensor 7 and stretch into gland 2 boss section screwed hole in be used for cantilever mounted beam type pressure sensor 7；It is described
Signal processor 3 is connected by signal wire with beam type pressure sensor 7 realizes the acquisition process of contact stress signal；It is described
Transmission rod 9 includes protuberance, three positions of thread segment and smooth section successively：Protuberance is hexagonal boss as the installation part
Retaining part, the corresponding threaded holes of thread segment and beam type pressure sensor 7 are closed, and smooth section passes through the boss section of gland 2
Through hole extend into the upper surface of rubber o-ring 1 to be measured, and maintains an equal level with sealed groove upper surface；The containment vessel 4 seals for top
Close, the cylinder of lower open, and constitute protection cavity with base 2, realized and sealed by sealing O-ring 10, and pass through outer spiral shell
Nail 16 is realized and is connected；The right side of containment vessel 4 is used to monitor in real time from experiment cavity provided with hydrogen sensor 8 leaks into protection chamber
The gas that bleed outlet 6 is used to release in protection cavity, containment vessel 4 are then provided with the gas content of body, the upper end center of containment vessel 4
Lower surface provided with rectangular recess be used for sealing O-ring 10 is installed.
A diameter of 1mm of the through hole of the boss section of the gland 2, and the center line of the through hole passes through RUBBER O shape to be measured
The section center of circle of circle 1.
The a diameter of of the smooth section of the transmission rod 9 is not more than 0.6mm.
The upper surface of the base 12 is used for base 12 and gland 2, bottom in gland 2 and the adjacent of containment vessel 4 provided with boss
Installation between seat 12 and containment vessel 4 is positioned.
The beam type pressure sensor 7 is used as strain measurement element using resistant to hydrogen foil gauge.
The concrete application step of this example is as follows：
Rubber o-ring 1 to be measured is inserted in gland 2 first, and ensures the convex of the upper surface of rubber o-ring 1 to be measured and gland 2
The lower surface of platform section connects；Then the compression ratio according to needed for test is inserted in the packing ring 14 of respective thickness the Step-edge Junction of gland 2
At structure, and then the external thread section of the precession gland 2 of pressure ring 11, inner bolt 15 is then installed and realized between gland 2 and base 12
It is connected, now rubber o-ring to be measured is installed in boss section, smooth cylindrical section and pressure ring 11, the structure of base 12 by gland 2
Into sealed groove in.By screw 5 is through the left side smooth bore of beam type pressure sensor 7 and extend into the upper table of gland 2
In the screwed hole of centre in face, the fixation of beam type pressure sensor 7 is realized；Transmission rod 9 is penetrated beam type pressure successively again
The through hole that the right side screwed hole of force snesor 7, the outer rim position of the boss section of gland 2 are set, and it extend into rubber o-ring to be measured
1 upper surface, and keep maintaining an equal level with sealed groove upper surface.Then, sealing O-ring 10 is inserted in the rectangle that containment vessel 4 is set
In groove, then male screw thread 16 is installed and realizes being connected between containment vessel 4 and base 12.Then, lead to toward import/exhaust mouthful 13
Enter test gas-high pressure hydrogen, after high pressure hydrogen is filled into experiment cavity, high pressure hydrogen extrudes rubber o-ring 1 to be measured
To the upside of sealed groove, now the end face of the smooth section of transmission rod 9 and is transmitted power by the extruding of rubber o-ring 1 to be measured
Onto beam type pressure sensor 7, after obtaining the pressure value through signal processor 3, by the smooth section of itself divided by transmission rod 9
Face area is that can obtain the mean exposure stress of the measuring point.Because the diameter of the smooth section of transmission rod 9 is smaller（No more than
0.6mm）, therefore the mean exposure stress obtained is close to the actual contact stress of the point.When rubber o-ring 1 to be measured can not
When realizing sealing, the high pressure hydrogen in experiment cavity would leak into protection cavity, and now hydrogen sensor 8 can monitoring leakage in real time
Hydrogen content in protection cavity.After off-test, the hydrogen in test cavity body is released outward by import/exhaust mouthful 13,
And the gas leakage contained in protection cavity is discharged outward by bleed outlet 6, then dismantle sample.
In above-mentioned applying step, the screw thread that need to only change between the thickness of packing ring 14, or adjustment pressure ring 11 and gland 2 revolves
It is right, you can to realize the seal with O ring performance test of different compression ratios.
In this example, contact stress measurements structure is opened on the non-primary sealing area of sealed groove（O-ring is squeezed by gas
Press the offside of active side）, it is to avoid to primary sealing area（Sides adjacent of the O-ring by gas squeezing action side）Damage, effectively keep away
Test failure caused by test gas is leaked at contact stress measurements structure is exempted from.
In this example, two parts of gland and pressure ring for constituting sealed groove structure are set to demountable structure, without
The O-ring that swells can easily realize installation, and therefore, sample installation process is simple and convenient, reduce rubber o-ring to be measured and installed
The difficulty of journey, which is decreased in installation process, occurs the possibility that rubber is damaged.
It is described above, only it is specific implementation case of the present utility model, not makees any form to the utility model
On limitation, although the utility model is disclosed as above with preferable case study on implementation, but is not limited to the utility model, is appointed
What those skilled in the art, is not departing from the range of technical solutions of the utility model, when the knot using the disclosure above
Structure and technology contents make some changes or modification and turn into the equivalence enforcement case of equivalent variations.For example, the utility model is simultaneously
Do not limit and be served only for using hydrogen as test(ing) medium, be equally applicable to the experiment such as hydrogen sulfide gas, natural gas and hydrogen gas mixture
Medium.In every case without departing from the content of technical solutions of the utility model, according to technical spirit of the present utility model to above implementation case
Any simple modification, equivalent variations and modification that example is made, still fall within the range of technical solutions of the utility model.
Claims (9)
1. rubber o-ring sealing property testing equipment under high pressure hydrogen environment, it is characterised in that including rubber o-ring to be measured, gland,
Containment vessel, screw, bleed outlet, beam type pressure sensor, hydrogen sensor, transmission rod, sealing O-ring, pressure ring, base, enter/
Exhaust outlet, packing ring, inner bolt and male screw thread, wherein：
The pressure ring is hollow circular ring structure, and its inner side is made up of smooth section and internal thread segment, smooth section and internal thread segment phase
Place is met to expand shape ledge structure；The base is the cylinder that opened upper end, bottom are closed, the bottom center of base be provided with into/
Exhaust outlet is used for the air inlet of test gas and released；
Three positions of external thread section of gland boss successively including upper end section, middle smooth cylindrical section and lower end：It is convex
Constituting sealed groove between platform section, smooth cylindrical section and the base and the pressure ring is used to install rubber o-ring to be measured；
The upper surface of boss section is provided with screwed hole, and outer rim position is provided with the upper center position phase of a through hole and the sealed groove
Connect；Smooth cylindrical section and the expansion shape that external thread section joint is recessed shape ledge structure, the recessed shape ledge structure and pressure ring
Ledge structure is engaged for mounting gasket；External thread section is engaged composition threaded connection with the internal thread segment of the pressure ring；Institute
Packing ring is stated for hollow torus, the axle for controlling the sealed groove residing for above-mentioned rubber o-ring to be measured is engaged with pressure ring
To depth；
Experiment cavity is constituted between the gland and base, and sealing is realized by rubber o-ring to be measured, and passes through inner bolt
Realization is connected；The beam type pressure sensor is fixed on gland；The transmission rod is used for rubber o-ring to be measured
The power produced after being squeezed passes to beam type pressure sensor；The containment vessel constitutes sealedly protection chamber with base
Body, containment vessel is used to monitor the gas content for leaking into protection cavity from experiment cavity in real time provided with hydrogen sensor, and containment vessel is also
It is provided with the bleed outlet for gas in protection cavity of releasing.
2. rubber o-ring sealing property testing equipment under high pressure hydrogen environment according to claim 1, it is characterised in that described
The left side of beam type pressure sensor is provided with smooth bore, and right side is provided with screwed hole；The screw passes through beam type pressure
The smooth bore of sensor and stretch into gland boss section screwed hole in be used for cantilever mounted beam type pressure sensor.
3. rubber o-ring sealing property testing equipment under high pressure hydrogen environment according to claim 1, it is characterised in that also wrap
Signal processor is included, the signal processor is connected by signal wire with beam type pressure sensor realizes contact stress signal
Acquisition process.
4. rubber o-ring sealing property testing equipment under high pressure hydrogen environment according to claim 1, it is characterised in that described
Transmission rod includes protuberance, three positions of thread segment and smooth section successively：Protuberance is hexagonal boss as installation transmission rod
Retaining part, the corresponding threaded holes of thread segment and beam type pressure sensor are closed, and smooth section is logical through the boss section of gland
Hole extend into the upper surface of rubber o-ring to be measured, and maintains an equal level with sealed groove upper surface.
5. rubber o-ring sealing property testing equipment under high pressure hydrogen environment according to claim 1, it is characterised in that described
Containment vessel is closed upper part, the cylinder of lower open, and constitutes protection cavity with base, is realized and sealed by sealing O-ring, with
And be connected by male screw thread realization；The right side of containment vessel is used to monitor in real time provided with hydrogen sensor to be leaked into from experiment cavity
Protect and the gas that bleed outlet is used to release in protection cavity is then provided with the gas content of cavity, the upper end center of containment vessel, protect
The lower surface of protective case is used to install sealing O-ring provided with rectangular recess.
6. rubber o-ring sealing property testing equipment under high pressure hydrogen environment according to claim 1, it is characterised in that described
Gland boss section through hole a diameter of 1mm, and the through hole center line pass through rubber o-ring to be measured the section center of circle.
7. rubber o-ring sealing property testing equipment under high pressure hydrogen environment according to claim 1, it is characterised in that described
The a diameter of of the smooth section of transmission rod is not more than 0.6mm.
8. rubber o-ring sealing property testing equipment under high pressure hydrogen environment according to claim 1, it is characterised in that institute
State the peace that the upper surface of base is used between base and gland, base and containment vessel in gland and containment vessel adjacent provided with boss
Set position.
9. rubber o-ring sealing property testing equipment under high pressure hydrogen environment according to claim 1, it is characterised in that institute
Beam type pressure sensor is stated using resistant to hydrogen foil gauge as strain measurement element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720032306.4U CN206618538U (en) | 2017-01-12 | 2017-01-12 | Rubber o-ring sealing property testing equipment under high pressure hydrogen environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720032306.4U CN206618538U (en) | 2017-01-12 | 2017-01-12 | Rubber o-ring sealing property testing equipment under high pressure hydrogen environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206618538U true CN206618538U (en) | 2017-11-07 |
Family
ID=60229704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720032306.4U Withdrawn - After Issue CN206618538U (en) | 2017-01-12 | 2017-01-12 | Rubber o-ring sealing property testing equipment under high pressure hydrogen environment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765004A (en) * | 2019-01-21 | 2019-05-17 | 辽宁工程技术大学 | A kind of gas seal property analog synthesis detection system |
| CN110207903A (en) * | 2019-07-03 | 2019-09-06 | 清华大学 | A kind of controllable temperature high pressure gas seal performance energy experimental apparatus for testing |
| CN111208260A (en) * | 2018-11-21 | 2020-05-29 | 纬湃汽车电子(长春)有限公司 | Hydrogen sensor |
| CN112304530A (en) * | 2020-10-29 | 2021-02-02 | 清华大学 | Inner inclination angle testing device capable of analyzing influence of O-shaped ring section diameter on high-pressure sealing performance |
| CN112326156A (en) * | 2020-10-29 | 2021-02-05 | 清华大学 | High-pressure gas seal that can set for dwell time detects and uses test system |
| EP4044140A1 (en) * | 2021-02-16 | 2022-08-17 | Vaillant GmbH | Method and apparatus for detecting hydrogen from leakages in a heater operable with hydrogen |
-
2017
- 2017-01-12 CN CN201720032306.4U patent/CN206618538U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208260A (en) * | 2018-11-21 | 2020-05-29 | 纬湃汽车电子(长春)有限公司 | Hydrogen sensor |
| CN109765004A (en) * | 2019-01-21 | 2019-05-17 | 辽宁工程技术大学 | A kind of gas seal property analog synthesis detection system |
| WO2020151367A1 (en) * | 2019-01-21 | 2020-07-30 | 山东科技大学 | Simulated comprehensive test system for gas sealing performance |
| CN110207903A (en) * | 2019-07-03 | 2019-09-06 | 清华大学 | A kind of controllable temperature high pressure gas seal performance energy experimental apparatus for testing |
| CN112304530A (en) * | 2020-10-29 | 2021-02-02 | 清华大学 | Inner inclination angle testing device capable of analyzing influence of O-shaped ring section diameter on high-pressure sealing performance |
| CN112326156A (en) * | 2020-10-29 | 2021-02-05 | 清华大学 | High-pressure gas seal that can set for dwell time detects and uses test system |
| CN112326156B (en) * | 2020-10-29 | 2021-07-30 | 清华大学 | High-pressure gas seal that can set for dwell time detects and uses test system |
| CN112304530B (en) * | 2020-10-29 | 2021-08-17 | 清华大学 | Inner inclination angle testing device capable of analyzing influence of O-shaped ring section diameter on high-pressure sealing performance |
| EP4044140A1 (en) * | 2021-02-16 | 2022-08-17 | Vaillant GmbH | Method and apparatus for detecting hydrogen from leakages in a heater operable with hydrogen |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171107 Effective date of abandoning: 20230321 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20171107 Effective date of abandoning: 20230321 |