CN105864018B - A kind of ultra-low temperature testing device suitable for immersed pump - Google Patents
A kind of ultra-low temperature testing device suitable for immersed pump Download PDFInfo
- Publication number
- CN105864018B CN105864018B CN201610206985.2A CN201610206985A CN105864018B CN 105864018 B CN105864018 B CN 105864018B CN 201610206985 A CN201610206985 A CN 201610206985A CN 105864018 B CN105864018 B CN 105864018B
- Authority
- CN
- China
- Prior art keywords
- storage tank
- pump
- experiment
- test
- experimental rig
- 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.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of ultra-low temperature testing device suitable for immersed pump, the experimental rig includes：Test storage tank, circulating storage tank, suction line, discharge pipe, discharge pipe inlet seal is inserted into experiment outlet, experiment storage tank import is connected with suction line outlet, sucking tube inlet is connected with circulating storage tank outlet, circulating storage tank import is connected with discharge pipe outlet, it is respectively equipped with vibrating sensor and shaft position sensor in experiment storage tank, it is respectively arranged with mouth piece thermometer and mouth piece pressure gauge on experiment storage tank, it is provided with electrical connection sealing element on experiment storage tank, pump discharge thermometer is respectively arranged on discharge pipe, pump discharge pressure meter and pump outlet flow gauge, the cooling body for cooling test medium is provided in circulating storage tank.The operating mode when present invention simulates immersed pump practical application makes a service test, and can evaluate and test out the performance in immersed pump actual moving process to greatest extent, verify its working performance, security performance and stability.
Description
Technical field
The present invention relates to immersed pump low-temperature test fields, and in particular to a kind of cryogenic testing suitable for immersed pump fills
It sets.
Background technology
LNG immersed pumps are the pumping units for conveying ultralow temperature liquified natural gas, and when work, the entire pump housing is immersed in
In liquid LNG, receded disk impeller high speed rotation is driven by built-in motor, LNG is transferred out out of storage cabin, this form
Pump be widely used on the facilities such as land LNG storage tank and marine LNG ship.
Ultralow temperature due to LNG media and volatile inflammable and explosive characteristic need whole submergence when LNG immersed pumps work
In closed LNG storages cabin, cable accesses the motor inside LNG immersed pumps from the external world by special sealing structure, latent for LNG
The operating of liquid pump provides power.In the operation process of LNG immersed pumps, it is desirable that it is resistant to the super of -162 DEG C or so of LNG media
Low temperature environment, and sealing everywhere is required for extremely reliably preventing LNG from overflowing the danger for causing explosion.This special use
Environment and operating mode propose high requirement to the design and manufacture of LNG immersed pumps, in order to ensure pump Specifeca tion speeification with
And stability and safety are met the requirements, every pump is required for after fabrication in the experimental rig of profession, simulates practical application
Operating mode makes a service test, and verifies its working performance, security performance and stability etc..
But existing experimental rig mostly can only be detected the critical component of LNG immersed pumps, can not be to LNG immersed pumps
Carry out the test of complete machine simulation actual condition.
Invention content
System test is carried out in order to solve the problems, such as that the prior art cannot simulate actual condition completely, the embodiment of the present invention carries
A kind of ultra-low temperature testing device suitable for immersed pump is supplied.Its technical solution is as follows：
An embodiment of the present invention provides a kind of ultra-low temperature testing device suitable for immersed pump, the experimental rig includes：
Storage tank, circulating storage tank, suction line, discharge pipe are tested, the discharge pipe inlet seal is inserted into the experiment outlet, institute
It states experiment storage tank import with suction line outlet to be connected, the sucking tube inlet is connected with circulating storage tank outlet, described
Circulating storage tank import is connected with discharge pipe outlet, and the vibration that detection test pump is respectively provided in the experiment storage tank passes
Sensor and shaft position sensor, it is described experiment storage tank on correspond to it is described test mouth piece position be respectively arranged with mouth piece temperature
Degree meter and mouth piece pressure gauge, it is described to test the electrical connection sealing for being provided on storage tank and being pierced by for the cable of the test pump
Part, correspond on the discharge pipe experiment pump discharge position be respectively arranged with pump discharge thermometer, pump discharge pressure meter and
Pump outlet flow gauge is provided with the cooling body for cooling test medium in the circulating storage tank.
In an implementation of the embodiment of the present invention, it is separately installed on the experiment storage tank and the circulating storage tank
Liquid level gauge is communicated between experiment storage tank and the circulating storage tank for ensureing the accurate liquid of the measurement of the liquid level gauge
Balance pipe.
In another realization method of the embodiment of the present invention, the circulating storage tank top is provided with and can let out over-pressure gas
The pressure relief valve run out.
In another realization method of the embodiment of the present invention, flow control valve is provided on the discharge pipe.
In another realization method of the embodiment of the present invention, the experimental rig further includes data acquisition unit, described
Vibrating sensor, the shaft position sensor, the pump discharge thermometer, the pump discharge pressure meter, the pump outlet flow
The signal output end of gauge, the mouth piece thermometer and the mouth piece pressure gauge is connected with the collecting unit respectively.
In another realization method of the embodiment of the present invention, the experimental rig further includes control unit, the control
Unit is connected with the control circuit of the test pump.
In another realization method of the embodiment of the present invention, the cooling body is liquid nitrogen circulation pipe.
In another realization method of the embodiment of the present invention, the test(ing) medium is LNG or liquid nitrogen.
In another realization method of the embodiment of the present invention, the experiment storage tank, the circulating storage tank, the suction line
It is coated with heat insulation foam with the discharge pipe surface.
In another realization method of the embodiment of the present invention, the experiment storage tank and the circulating storage tank are using resistance to
The closed container that the austenitic stainless steel of low temperature makes.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：Since test pump is that Integral sealing is mounted on
It in experimental rig, is immersed in test(ing) medium and is tested, therefore the device is operating mode when simulating immersed pump practical application
The overall performance test of progress can evaluate and test out the performance in test pump actual moving process to greatest extent, verify its work
Make performance, security performance and stability；By the cooling body being arranged in circulating storage tank, extraneous incoming and internal examination is absorbed
The heat that pump acting generates is tested, can ensure that stability and the safety of experimental rig to greatest extent；Entirely pilot system is
One circulating system, test(ing) medium recycle in experimental rig, have saved cost；By being arranged in each position of experimental rig
The data for the sensor measurement set, personnel easy to operation judge the performance of test pump with state.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is experimental rig structure composition schematic diagram provided in an embodiment of the present invention.
Wherein, the meaning of attached figure label is as follows：1- test pumps, 2- test storage tank, 3- circulating storage tanks, 4- suction lines, 5-
Inlet valve, 6- discharge pipes, 7- flow control valves, 8- liquid nitrogen circulation pipes, 9- fluid balance pipes, 10- data acquisition units, 11- storages
Tank implementation of port, 12- control units, 13- circulating storage tank liquid level gauges, 14- test storage tank liquid-level meter, 15- mouth piece pressure gauges, 16-
Mouth piece thermometer, 17- pump discharge pressure meters, 18- pump discharge thermometers, 19- pump outlet flow gauge, 20- data transmission links,
21- pressure relief valves, 22- vibrating sensors, 23- shaft position sensors, 24- testing stand grounds, 25- circulating storage tank holders,
26- tests tank support.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
An embodiment of the present invention provides a kind of ultra-low temperature testing device suitable for immersed pump, Fig. 1 is the embodiment of the present invention
The structure composition schematic diagram of the experimental rig of offer, referring to Fig. 1, which includes mainly：Test storage tank 2, circulating storage tank
3, suction line 4, discharge pipe 6, experiment storage tank 2 are mounted on experiment tank support 26, and circulating storage tank 3 passes through circulating storage tank holder 25
On testing stand ground 24,6 inlet seal of discharge pipe is inserted into experiment storage tank 2 and exports interior, experiment 2 import of storage tank and sucking
The outlet of pipe 4 is connected, and the entrance of suction line 4 is connected with the outlet of circulating storage tank 3, and 3 import of circulating storage tank is connected with the outlet of discharge pipe 6,
It is respectively provided with the vibrating sensor 22 and shaft position sensor 23 of detection test pump 1 in experiment storage tank 2, tests storage tank 2
The position of upper 1 suction inlet of corresponding test pump is respectively arranged with mouth piece thermometer 16 and mouth piece pressure gauge 15, tests and is set on storage tank 2
It is equipped with the electrical connection sealing element being pierced by for the cable of test pump 1, the position difference of the outlet of test pump 1 is corresponded on discharge pipe 6
It is provided with pump discharge thermometer 18, pump discharge pressure meter 17 and pump outlet flow gauge 19, is provided in circulating storage tank 3 for cooling down
The cooling body of test(ing) medium.Vibrating sensor 22 is used for measuring the vibration of test pump 1, and shaft position sensor 23 is used for measuring
The axial displacement of 1 internal rotor of test pump, mouth piece thermometer 16 are used for monitoring test and pump 1 suction inlet temperature, mouth piece pressure gauge 15
1 suction inlet pressure is pumped for monitoring test, pump discharge thermometer 18 is used for monitoring test and pumps 1 outlet temperature, pump discharge pressure meter 17
1 outlet pressure is pumped for monitoring test, pump outlet flow gauge 19 is used for measuring 1 rate of discharge of test pump, passes through the experiment measured
The vibration of pump 1, the axial displacement of rotor, 1 suction inlet temperature of test pump, 1 suction inlet pressure of test pump, 1 outlet temperature of test pump, experiment
1 outlet pressure and 1 rate of discharge of test pump are pumped to judge the performance and state of test pump 1.
When test pump 1 will be tested, 1 integral sealing of test pump be mounted on experiment storage tank 2 in, test pump 1 outlet with
6 inlet seal of discharge pipe connects, and test(ing) medium is full of entire experimental rig, makes test(ing) medium under the action of test pump 1,
It is circulated in the circulatory system being made of experiment storage tank 2, circulating storage tank 3, suction line 4 and discharge pipe 6.
In embodiments of the present invention, it tests and is separately installed with circulating storage tank liquid level gauge 13 and examination on storage tank 2 and circulating storage tank 3
Storage tank liquid-level meter 14 is tested, tests and is also communicated between storage tank 2 and circulating storage tank 3 for ensureing circulating storage tank liquid level gauge 13 and experiment
The accurate fluid balance pipe 9 of measurement of storage tank liquid-level meter 14 can observe experiment storage tank 2 and circulating storage tank in real time by liquid level gauge
Test(ing) medium need to be replenished in time when liquid level is too low in tank for liquid level in 3, prevent the idle running of test pump 1 from causing failure.
In embodiments of the present invention, 3 top of circulating storage tank is provided with the pressure relief valve that over-pressure gas can be released away
21.When pressure is more than setting value in circulating storage tank 3, pressure relief valve 21 automatically opens, and the gas of part superpressure is released out
It goes, when pressure is reduced to setting value or is less than setting value in circulating storage tank 3, pressure relief valve 21 is automatically closed, and keeps cycle
Pressure is in reasonable range in storage tank 3.
In embodiments of the present invention, it is provided with flow control valve 7 on discharge pipe 6, flow control valve 7 can be adjusted to control
The flow of the test(ing) medium of test pump 1 during the test, to test under the conditions of different flow, the performance of above-mentioned test pump 1
And stability.
In embodiments of the present invention, above-mentioned experimental rig further includes data acquisition unit 10, vibrating sensor 22, axial position
Displacement sensor 23, pump discharge thermometer 18, pump discharge pressure meter 17, pump outlet flow gauge 19, mouth piece thermometer 16, mouth piece
The signal of pressure gauge 15 accesses data acquisition unit 10 by data transmission link 20, and console is passed to after data processing,
Person easy to operation carries out data record and trystate detection.Since test pump 1 is that entirety is immersed in test(ing) medium at runtime
In, operating status can not be observed directly, so by above-mentioned experimental rig, operating personnel can be allowed to monitor above-mentioned test pump in real time
1 operating status and performance.
In embodiments of the present invention, above-mentioned experimental rig further includes control unit 12, the electricity of control unit 12 and test pump 1
Cable is connected, for the power supply of test pump 1 and the working condition of Control experiment pump 1.
In embodiments of the present invention, above-mentioned cooling body is liquid nitrogen circulation pipe 8, during experiment, in liquid nitrogen circulation pipe 8
It constantly is passed through liquid nitrogen, by the liquid nitrogen in liquid nitrogen circulation pipe 8, heat and the external world that absorption test pump 1 generates are conducted to system
Interior heat ensure that stability and the safety of experimental rig.
In embodiments of the present invention, above-mentioned test(ing) medium is LNG (liquefied natural gas, abbreviation LNG) or liquid
Nitrogen, true simulation actual condition are tested.
In embodiments of the present invention, test storage tank 2, circulating storage tank 3, suction line 4,6 surface of discharge pipe be coated with it is heat-insulated
Cotton prevents external heat from excessively conducting to inside and test(ing) medium is caused to gasify, and increases security of system.
In embodiments of the present invention, testing storage tank 2 and circulating storage tank 3 is made of low temperature resistant austenitic stainless steel
Closed container, reliability is high, adaptability is good, manufacturing cost is relatively low, the experiment especially suitable for the easily gasified liquid such as LNG.
Since test pump is that Integral sealing is mounted in experimental rig, it is immersed in test(ing) medium and is tested, therefore should
Device is the overall performance test that operating mode when simulating immersed pump practical application carries out, and evaluates and tests out test pump reality to greatest extent
Performance in the operational process of border verifies its working performance, security performance and stability；By being arranged in circulating storage tank
Cooling body absorbs the heat that extraneous incoming and closed test pump acting generates, ensure that experimental rig to greatest extent
Stability and safety；Entire pilot system is a circulating system, and test(ing) medium recycles in experimental rig, is saved
Cost；By the way that the data in the sensor measurement of each position of experimental rig, performance of the personnel easy to operation to test pump is arranged
Judged with state.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of ultra-low temperature testing device suitable for immersed pump, which is characterized in that the experimental rig includes：Experiment storage tank,
Circulating storage tank, suction line, discharge pipe, the discharge pipe inlet seal are inserted into the experiment outlet, the experiment storage
Tank import is connected with suction line outlet, and the sucking tube inlet is connected with circulating storage tank outlet, the circulating storage tank
Import is connected with discharge pipe outlet, and the vibrating sensor and axis of detection test pump are respectively provided in the experiment storage tank
To displacement sensor, the position that the experiment mouth piece is corresponded on the experiment storage tank is respectively arranged with mouth piece thermometer and pump
Suction inlet pressure gauge is provided with the electrical connection sealing element being pierced by for the cable of the test pump on the experiment storage tank, described
The position that the experiment pump discharge is corresponded on discharge pipe is respectively arranged with pump discharge thermometer, pump discharge pressure meter and pump outlet flow
Gauge is provided with the cooling body for cooling test medium in the circulating storage tank,
Be separately installed with liquid level gauge on the experiment storage tank and the circulating storage tank, the experiment storage tank and the circulating storage tank it
Between be communicated with for ensureing the accurate fluid balance pipe of the measurement of the liquid level gauge, the test(ing) medium is LNG or liquid nitrogen.
2. experimental rig according to claim 1, which is characterized in that the circulating storage tank top is provided with can be by superpressure gas
The pressure relief valve that body is released away.
3. experimental rig according to claim 1, which is characterized in that be provided with flow control valve on the discharge pipe.
4. experimental rig according to claim 1, which is characterized in that the experimental rig further includes data acquisition unit,
The vibrating sensor, the pump discharge thermometer, the pump discharge pressure meter, described pumps out the shaft position sensor
The signal output end of mouthful flowmeter, the mouth piece thermometer and the mouth piece pressure gauge respectively with the collecting unit phase
Even.
5. experimental rig according to claim 1, which is characterized in that the experimental rig further includes control unit, described
Control unit is connected with the control circuit of the test pump.
6. experimental rig according to claim 1, which is characterized in that the cooling body is liquid nitrogen circulation pipe.
7. experimental rig according to claim 1, which is characterized in that the experiment storage tank, the circulating storage tank, the suction
Enter pipe and the discharge pipe surface is coated with heat insulation foam.
8. experimental rig according to claim 1, which is characterized in that the experiment storage tank and the circulating storage tank are adopted
The closed container made of low temperature resistant austenitic stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206985.2A CN105864018B (en) | 2016-04-05 | 2016-04-05 | A kind of ultra-low temperature testing device suitable for immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206985.2A CN105864018B (en) | 2016-04-05 | 2016-04-05 | A kind of ultra-low temperature testing device suitable for immersed pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105864018A CN105864018A (en) | 2016-08-17 |
| CN105864018B true CN105864018B (en) | 2018-09-07 |
Family
ID=56628248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610206985.2A Active CN105864018B (en) | 2016-04-05 | 2016-04-05 | A kind of ultra-low temperature testing device suitable for immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105864018B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441473A (en) * | 2016-08-31 | 2017-02-22 | 烟台中隆仪表有限公司 | Precooling-free mass flowmeter |
| FR3066007B1 (en) * | 2017-05-05 | 2020-10-02 | Gaztransport Et Technigaz | STORAGE INSTALLATION FOR LIQUEFIED GAS |
| CN107044911A (en) * | 2017-05-16 | 2017-08-15 | 大连深蓝泵业有限公司 | Low-temperature test system and liquefied natural gas decompression operating mode LNG hydraulic turbine low-temperature test methods |
| CN107587999B (en) * | 2017-09-08 | 2019-06-21 | 武汉船用机械有限责任公司 | A kind of ultra-low temperature testing device and method |
| CN109506970B (en) * | 2018-12-29 | 2024-05-24 | 天津市合润科技有限责任公司 | Side-entering stirrer performance detection experimental data acquisition system |
| CN110261099B (en) * | 2019-06-20 | 2023-11-14 | 江苏亿阀股份有限公司 | Low-temperature valve internal cooling circulation experiment system |
| CN112228773A (en) * | 2019-07-15 | 2021-01-15 | 北京长征天民高科技有限公司 | Cryogenic test system |
| CN116292243B (en) * | 2023-02-16 | 2024-02-23 | 上海阿波罗机械股份有限公司 | Closed continuous self-feedback cryogenic pump test system depending on liquefied natural gas factory |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5979082A (en) * | 1982-10-28 | 1984-05-08 | Osaka Gas Co Ltd | Operation test for lng pump |
| SU1368489A1 (en) * | 1986-03-14 | 1988-01-23 | Казахский Научно-Исследовательский Институт Водного Хозяйства | Stand for testing immersion pump units |
| CN101645647A (en) * | 2009-08-24 | 2010-02-10 | 中国电力科学研究院 | DC converter valve cooling system based on passive technology |
| CN201522257U (en) * | 2009-07-18 | 2010-07-07 | 云峰发电厂 | System for monitoring inclination of dam foundation automatically |
| CN203742971U (en) * | 2014-02-24 | 2014-07-30 | 大连深蓝泵业有限公司 | Novel cryogenic pump test bench |
| DE202015003461U1 (en) * | 2015-05-15 | 2015-06-30 | Fladt Engineering Ug | Device for testing the functionality of a submersible pump |
| CN104847671A (en) * | 2015-04-20 | 2015-08-19 | 中国石油化工股份有限公司 | Low-temperature submersible pump testing method |
| CN104865043A (en) * | 2015-05-07 | 2015-08-26 | 中国石油大学(华东) | Liquefied natural gas (LNG) low-temperature flowing characteristic experimental device |
-
2016
- 2016-04-05 CN CN201610206985.2A patent/CN105864018B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5979082A (en) * | 1982-10-28 | 1984-05-08 | Osaka Gas Co Ltd | Operation test for lng pump |
| SU1368489A1 (en) * | 1986-03-14 | 1988-01-23 | Казахский Научно-Исследовательский Институт Водного Хозяйства | Stand for testing immersion pump units |
| CN201522257U (en) * | 2009-07-18 | 2010-07-07 | 云峰发电厂 | System for monitoring inclination of dam foundation automatically |
| CN101645647A (en) * | 2009-08-24 | 2010-02-10 | 中国电力科学研究院 | DC converter valve cooling system based on passive technology |
| CN203742971U (en) * | 2014-02-24 | 2014-07-30 | 大连深蓝泵业有限公司 | Novel cryogenic pump test bench |
| CN104847671A (en) * | 2015-04-20 | 2015-08-19 | 中国石油化工股份有限公司 | Low-temperature submersible pump testing method |
| CN104865043A (en) * | 2015-05-07 | 2015-08-26 | 中国石油大学(华东) | Liquefied natural gas (LNG) low-temperature flowing characteristic experimental device |
| DE202015003461U1 (en) * | 2015-05-15 | 2015-06-30 | Fladt Engineering Ug | Device for testing the functionality of a submersible pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105864018A (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105864018B (en) | A kind of ultra-low temperature testing device suitable for immersed pump | |
| CN103308293B (en) | A kind of high temperature valve detection experiment system | |
| KR100766521B1 (en) | Testing apparatus of seal ring for hydrogen gas preventing leakage | |
| CN201803832U (en) | Tester using acoustic emission signals to detect valve leakage | |
| CN107035676B (en) | Device and method for testing external characteristics of cryogenic pump with controllable medium phase change inducement | |
| CN102297123A (en) | Internal combustion engine oil pump test bed | |
| CN202073872U (en) | Driving experiment device of hydraulic motor for airplane generator | |
| CN112727784A (en) | Axial flow pump blade top cavitation vortex dynamic characteristic identification test device and method | |
| CN208420321U (en) | Safety valve testing equipment | |
| CN203259337U (en) | High-temperature valve detection test system | |
| CN110242553A (en) | Nuclear power station oil pumping system test platform and its test method | |
| CN202250771U (en) | Test bench for lubricating oil pump of internal combustion engine | |
| CN208505496U (en) | Geotechnical centrifuge windage quantity of heat production test device under a kind of vacuum environment | |
| CN103541890A (en) | Self-sucking pump | |
| CN111043105A (en) | High-power hydraulic comprehensive test bed and test method thereof | |
| CN108827561A (en) | Safety valve testing equipment | |
| CN105223084B (en) | A kind of compressible foam material performance test evaluating apparatus | |
| CN111579176B (en) | Mechanical seal environment testing system | |
| CN115077810A (en) | Multi-parameter controllable oil-gas seal leakage test system | |
| CN101419242B (en) | Test method for critical speed of centrifugal pump and test device thereof | |
| US11561147B2 (en) | Device and method for improved testing of a hydraulic part for a turbomachine | |
| CN114923640A (en) | Underground ultrasonic leakage detection simulation test device and test method thereof | |
| CN216206882U (en) | Electromagnetic flow converter integrated circuit module measurement accuracy experiment testing arrangement | |
| RU2811042C1 (en) | Bench for calibration and initial verification of in-line density converters | |
| CN220434998U (en) | Electronic water pump pressure test board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |