CN106567827A - Vapor-liquid mixing test device for pump - Google Patents
Vapor-liquid mixing test device for pump Download PDFInfo
- Publication number
- CN106567827A CN106567827A CN201610917655.4A CN201610917655A CN106567827A CN 106567827 A CN106567827 A CN 106567827A CN 201610917655 A CN201610917655 A CN 201610917655A CN 106567827 A CN106567827 A CN 106567827A
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- liquid
- vapor
- pump
- gas
- pipeline
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- 239000007788 liquid Substances 0.000 title claims abstract description 148
- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 238000000926 separation method Methods 0.000 claims abstract description 25
- 230000005514 two-phase flow Effects 0.000 claims abstract description 7
- 238000012546 transfer Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 68
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 239000012071 phase Substances 0.000 description 7
- 239000007792 gaseous phase Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a vapor-liquid mixing test device for a pump, and relates to a mixing device for a pump. The vapor-liquid mixing test device comprises a vapor conveying unit, a liquid conveying unit, a vapor-liquid mixing device, a driving unit and a vapor-liquid separation unit. The vapor-liquid mixing test device for the pump is a closed system, the system does not communicate with the outside world when working, and heat preservation measures are taken for all the parts of the vapor-liquid mixing test device for the pump. Due to the fact that the vapor-liquid mixing test device for the pump is provided with the vapor-liquid mixing device and the vapor-liquid separation unit, a vapor-liquid mixture can be sufficiently and evenly mixed before entering the test pump, vapor in the vapor-liquid two-phase flow flowing through the test pump is separated out in a vapor-liquid separation device, the separated-out vapor is discharged out of the closed system, the balance of the closed system is ensured, the test system is more stable, and the test accuracy degree is ensured.
Description
Technical field
The present invention relates to a kind of pump mixing arrangement, more particularly to a kind of pump vapour-liquid bulk testing device.
Background technology
Down-hole oil gas mixed extraction pump testing stand is research multiphase flow flow behavior and multi-phase mixed pump external characteristics and internal flow
The basic device of rule, in the development process of multi-phase mixed pump, it is mainly used in the test to model machine and checking；In product pump
Production process in, then can be used to be tested, i.e., the technical performance, index to product is checked.Due to current oil gas water
Multi-phase mixed pump was needed through from being designed into test again to the repeatedly mistake repeatedly of design also in exploitation, the primary stage developed
Journey, it is therefore desirable to which design experiment platform is designed it and is modified and perfect.For above-mentioned deficiency, the present inventor invents
" a kind of pump vapour-liquid bulk testing device ", enables gas and liquid equably to be mixed, and improves the efficiency of mixing.
The content of the invention
It is an object of the invention to provide a kind of vapour-liquid mixing pump experimental provision, by technical parameter of this device to mixed extraction pump
Measure and perfect；The technical scheme that the present invention solves above-mentioned technical problem is as follows：
Including gas supply unit, liquid carrying unit, vapour-liquid mixing arrangement, driver element, measuring unit and vapour-liquid point
From unit；The vapor-liquid separation unit, liquid carrying unit, vapour-liquid mixing arrangement, driver element are sequentially connected, and driver element is also
It is connected with vapor-liquid separation unit, constitutes circulation line；The gas supply unit is also connected by pipeline with vapour-liquid mixing arrangement
Connect；
The gas supply unit includes steam generator, pressure and temp control system, pressure maintaining valve, gas Flow-rate adjustment
Valve, gas transfer pipeline, second pressure sensor, temperature sensor and gas flowmeter；Gas in the steam generator
Gas flow control valve, gas transfer pipeline and apparatus for combining liquids are flowed through successively by pipeline；On the gas transfer pipeline
It is provided with second pressure sensor, temperature sensor and gas flowmeter；Pressure maintaining valve and pressure are installed on the steam generator
Power temperature control system；
The liquid carrying unit includes booster pump, vacuum tank, liquid flow regulating valve, fluid flowmeter, liquid conveying
Pipeline, first pressure sensor, temperature sensor and pressure regulating system；The arrival end of the booster pump is by pipeline and vapour-liquid
The port of export of the vapor-liquid separating device in separative element is connected；The port of export of the booster pump is by pipeline and vacuum tank, liquid
Body flow control valve, liquid transmission pipeline are connected；Liquid line pressure regulating system is connected with the vacuum tank；The liquid
First pressure sensor, fluid flowmeter, temperature sensor are installed on body transfer pipeline；
The driver element includes motor and test pump；The motor and test pump are connected by shaft coupling；
The vapor-liquid separation unit includes vapor-liquid separating device and gas output pipe；The stream-liquid two-phase flow flows through test
After pump, vapor-liquid separating device is entered by pipeline, gas is discharged through gas output pipe, and liquid is entered by pipeline and is pressurized
Pump；
The measuring unit includes test pump inlet pressure transmitter and test pump discharge pressure transmitter；The test pump
Inlet pressure transmitter is arranged on the entrance point of test pump；The test pump discharge pressure transmitter is arranged on the outlet of test pump
End.
Further, the pump vapour-liquid bulk testing device is closed system, system operationally with extraneous not UNICOM.
Further, Insulation is all taken in all parts of the pump vapour-liquid bulk testing device, outside pipeline
The insulation material that is made up of extruded polystyrene foamed plastics of side winding, keep channel interior gas and fluid temperature it is steady
It is fixed.
Further, gas transfer pipeline in the gas supply unit is vertical with vapour-liquid mixing arrangement to be communicated.
Further, the liquid transmission pipeline in the liquid carrying unit and vapour-liquid mixing arrangement coaxial line.
Beneficial effects of the present invention：
1. the present invention is provided with vapour-liquid mixing arrangement and vapor-liquid separation unit, fills into before test pump beneficial to liquid-vapor mixture
Divide uniform mixing, the gas flow through in the stream-liquid two-phase flow of test pump is separated in vapor-liquid separating device, after separation
Gas is discharged closed system, it is ensured that the balance of closed system, makes pilot system more stable, it is ensured that test it is accurate
Degree.
2. the present invention is mounted with booster pump, it is ensured that stablizing for test pump entrance fluid flow, reduces line loss to examination
Test the impact of result.
3. it is two independent parts that the present invention arranges liquid transmission pipeline and gas transfer pipeline, respectively to liquid and vapour
The parameters such as flow, pressure, the temperature of body are adjusted control, it is ensured that the degree of accuracy of steam quality after vapour-liquid mixing, improve examination
The confidence level tested.
Description of the drawings
Fig. 1 is the structural representation of pump vapour-liquid combined experiments device of the present invention.
Reference is as follows：
1- first pressure sensors；2- liquid transmission pipelines；3- fluid flowmeters；4- temperature sensors；5- vapour-liquids mix
Device；6- gas flowmeters；7- temperature sensors；8- second pressure sensors；9- tests pump inlet pressure transmitter；10- is surveyed
Pump testing；11- shaft couplings；12- motor；13- tests pump discharge pressure transmitter；14- gas output pipes；15- vapor-liquid separations
Device；16- gas transfer pipelines；17- gas flow control valves；18- booster pumps；19- pressure maintaining valves；20- steam generators；21-
Pressure and temp control system；22- liquid line pressure regulating systems；23- vacuum tanks；24- liquid flow regulating valve doors.
Specific embodiment
It is that technical scheme is further understood from, is described in conjunction with accompanying drawing 1：
With reference to shown in Fig. 1, pump of the present invention is defeated with vapour-liquid bulk testing device, including gas supply unit, liquid
Send unit, vapour-liquid mixing arrangement 5, driver element, measuring unit and vapor-liquid separation unit；Liquid in the vapor-liquid separation unit
Liquid carrying unit, vapour-liquid mixing arrangement 5, driver element are flowed through successively by pipeline, in finally flowing back into vapor-liquid separation unit
Circulate again；The vapour-liquid mixing arrangement 5 is also connected by pipeline with gas supply unit；The pump is mixed with vapour-liquid
Experimental rig is closed system, and system is operationally disconnected, the pump institute of vapour-liquid bulk testing device with the external world
There is part all to carry out isothermal holding.
Gas supply unit includes steam generator 20, pressure and temp control system 21, pressure maintaining valve 19, gas Flow-rate adjustment
Valve 17, gas transfer pipeline 16, second pressure sensor 8, temperature sensor 7 and gas flowmeter 6；The steam generator 20
In gas gas flow control valve 17, gas transfer pipeline 16 and apparatus for combining liquids 5 are flowed through successively by pipeline；The vapour
Second pressure sensor 8, temperature sensor 7 and gas flowmeter 6 are provided with body transfer pipeline 16；The steam generator 20
On pressure maintaining valve 19 and pressure and temp control system 21 are installed.
Contain on steam generator 20 and temperature and pressure sensing is installed in pressure and temperature sensor, steam generator 20
Device is used to measure the measurement of the pressure and temperature that steam generator produces steam.Steam generator 20 produces the steam of certain pressure
After the decompression of pressure maintaining valve 19, the control and regulation of gas flow are carried out by gas flow control valve 17, entered gas flow
The gas of regulating valve 19 is transported in vapour-liquid mixing arrangement 5 by gas transfer pipeline 16, is installed on gas transfer pipeline 5
Second pressure sensor 8, temperature sensor 7 be used for measurement conveying gas pressure and temperature.
Pressure and temp control system 21, for controlling to the temperature and pressure of the steam produced in steam generator 20
System.The temperature control system of saturated vapor mainly detects the change of temperature value according to temperature sensor in steam generator 20
Change carries out corresponding dynamic regulation, and when temperature value of the temperature for detecting higher than setting, then pressure and temp control system 21 will
The heating power of steam generator can be reduced, the heat input in steam generator is reduced, so that the temperature of steam is reduced.When
The temperature for detecting less than setting temperature value when, then pressure and temp control system 21 will increase steam generator plus hot merit
Rate, increases the heat input in steam generator, so that the temperature of steam is improved.
Liquid carrying unit includes that booster pump 18, vacuum tank 23, liquid flow regulating valve 24, fluid flowmeter 3, liquid are defeated
Send pipeline 2, first pressure sensor 1, temperature sensor 4 and pressure regulating system 22；The arrival end of the booster pump 18 passes through
Pipeline is connected with the port of export of the vapor-liquid separating device 15 in vapor-liquid separation unit；The arrival end of the booster pump 18 is by pipe
Road is connected with vacuum tank 23, liquid flow regulating valve 24, liquid transmission pipeline 2；Liquid line is connected with the vacuum tank 23
Road pressure regulating system 22；First pressure sensor 1, fluid flowmeter 3, temperature are installed on the liquid transmission pipeline 2 to pass
Sensor 4.The driver element includes motor 12 and test pump 10；The motor 12 and test pump 10 are connected by shaft coupling 11
Connect.The purpose of booster pump 18 provides enough pressure for system, it is ensured that test pump 10 entrance fluid flow is stablized, prevent because
For the change of gas flow, cause the change of the test performance of pump 10, the inlet flow rate for causing is unstable, so as to reach accurately control vapour
The purpose of steam quality when liquid mixes, while also functioning to reduce impact of the line loss to result of the test.
Liquid line pressure regulating system 22 mainly by the size of the pressure of the gas-phase space on the top of vacuum tank 23 come
Be controlled, and the size of the pressure of gas-phase space and gas-phase space gas flow number have relation, you can with by control
The amount of the upper gaseous phase space gases of vacuum tank 23 is carrying out the Stress control of liquid transmission pipeline.The top of vacuum tank 23 has two sections
Gas piping, respectively air inlet pipeline and gas exhaust piping.One end of air inlet pipeline is connected one with the upper gaseous phase space of vacuum tank 23
End is connected with nitrogen pot, and the pressure of nitrogen is higher than the pressure of the gas-phase space gas on the top of vacuum tank 23, air inlet in nitrogen pot
Flow control valve is housed, for the amount that control is entered vacuum tank upper gaseous phase space nitrogen body by nitrogen pot in the middle of pipeline.Exhaust
One end of pipeline one end that is connected with vacuum tank upper gaseous phase space is connected with vacuum tank, and flow control valve is housed in the middle of gas exhaust piping
Door, for controlling the flow that vacuum tank discharges gas.To carry out vacuumizing process inside vacuum tank, make the pressure in vacuum tank low
In the pressure of vacuum tank upper gaseous phase space gases.
Vapor-liquid separation unit includes vapor-liquid separating device 15 and gas output pipe 14；The stream-liquid two-phase flow flows through test
After pump 10, vapor-liquid separating device 15 is entered by pipeline, gas is discharged through gas output pipe 14, liquid is entered by pipeline
Booster pump 18.
Through the mixed stream-liquid two-phase flow of vapour-liquid mixing arrangement 5, after flowing through test pump 10, by vapour-liquid mixed input tube
Road is entered in vapor-liquid separating device 15, and the separation of gas and liquid is carried out in vapor-liquid separating device 15, and the gas after separation leads to
Cross gas transfer pipeline 14 and be excluded system, the liquid after separation then continues to be circulated in system.Gas is in mixing arrangement
Inside be added in closed system, be then separated closed system in vapor-liquid separation unit, it is ensured that closed system it is flat
Weighing apparatus, makes pilot system more stable.The top of vapor-liquid separating device 15 is provided with pressure sensor and safety-valve, in its underpart
Equipped with liquid discharge valve door.
Measuring unit includes test pump inlet pressure transmitter 9 and test pump discharge pressure transmitter 13；The test pump
Inlet pressure transmitter 9 is arranged on the entrance point of test pump 10；The test pump discharge pressure transmitter 13 is arranged on test pump
10 port of export.
Gas transfer pipeline 16 in gas supply unit is vertical with vapour-liquid mixing arrangement 5 to be communicated；In liquid carrying unit
Liquid transmission pipeline 2 and the coaxial line of vapour-liquid mixing arrangement 5.So as to ensure that admission passage and inlet pipeline vertical distribution, vapour
Body and liquid are in mixing, it is ensured that the flow direction of gas and liquid is in the same direction, so makes mixed process more steady, base
Originally the flow regime of gas and liquid is maintained, the generation of vibration is reduced, the stability of system is improve.
Driver element includes motor, shaft coupling and test pump.Connected by shaft coupling between motor and test pump
Connect.
In the present embodiment, vapour-liquid mixing arrangement 5 and vapor-liquid separation unit 15 are installed, enter beneficial to liquid-vapor mixture and test
Full and uniform mixing before pump 10, the gas flow through in the stream-liquid two-phase flow of test pump is separated in vapor-liquid separating device 5,
Gas after separation is discharged closed system, it is ensured that the balance of closed system, makes pilot system more stable, it is ensured that test
The degree of accuracy.The present embodiment is mounted with booster pump 18, it is ensured that stablizing for the test entrance fluid flow of pump 10, reduces line loss
Impact to result of the test.The liquid transmission pipeline and gas transfer pipeline of the present embodiment is two independent parts, right respectively
The parameters such as flow, pressure, the temperature of liquid and gas are adjusted control, it is ensured that the degree of accuracy of steam quality after vapour-liquid mixing,
Improve the confidence level of test.
The embodiment be the present invention preferred embodiment, but the present invention is not limited to above-mentioned embodiment, not
In the case of the flesh and blood of the present invention, any conspicuously improved, replacement that those skilled in the art can make
Or modification belongs to protection scope of the present invention.
Claims (4)
1. a kind of pump vapour-liquid bulk testing device, it is characterised in that including gas supply unit, liquid carrying unit, vapour-liquid
Mixing arrangement (5), driver element, measuring unit and vapor-liquid separation unit；The vapor-liquid separation unit, liquid carrying unit, vapour
Liquid mixing arrangement (5), driver element are sequentially connected, and driver element is also connected with vapor-liquid separation unit, constitute circulation line；It is described
Gas supply unit is also connected by pipeline with vapour-liquid mixing arrangement (5)；
The gas supply unit includes steam generator (20), pressure and temp control system (21), pressure maintaining valve (19), flow of gas
Adjustable valve (17), gas transfer pipeline (16), second pressure sensor (8), temperature sensor (7) and gas flowmeter (6)；
Gas in the steam generator (20) flows through successively gas flow control valve (17), gas transfer pipeline (16) by pipeline
With apparatus for combining liquids (5)；Second pressure sensor (8), temperature sensor (7) are provided with the gas transfer pipeline (16)
With gas flowmeter (6)；Pressure maintaining valve (19) and pressure and temp control system (21) are installed on the steam generator (20)；
The liquid carrying unit includes booster pump (18), vacuum tank (23), liquid flow regulating valve (24), fluid flowmeter
(3), liquid transmission pipeline (2), first pressure sensor (1), temperature sensor (4) and pressure regulating system (22)；The increasing
The arrival end of press pump (18) is connected by pipeline with the port of export of the vapor-liquid separating device (15) in vapor-liquid separation unit；It is described
The port of export of booster pump (18) by pipeline successively with vacuum tank (23), liquid flow regulating valve (24), liquid transmission pipeline (2)
It is connected；Liquid line pressure regulating system (22) is connected with the vacuum tank (23)；Pacify on the liquid transmission pipeline (2)
Equipped with first pressure sensor (1), fluid flowmeter (3), temperature sensor (4)；
The driver element includes motor (12) and test pump (10)；The motor (12) and test pump (10) are by shaft coupling
Device (11) connects；
The measuring unit includes test pump inlet pressure transmitter (9) and test pump discharge pressure transmitter (13)；The survey
Entrance point of pump testing inlet pressure transmitter (9) installed in test pump (10)；Test pump discharge pressure transmitter (13) peace
It is mounted in the port of export of test pump (10)；
The vapor-liquid separation unit includes vapor-liquid separating device (15) and gas output pipe (14)；The stream-liquid two-phase flow is flowed through
After test pump (10), vapor-liquid separating device (15) is entered by pipeline, gas is discharged through gas output pipe (14), and liquid leads to
Pipeline is crossed into booster pump (18).
2. pump according to claim 1 vapour-liquid bulk testing device, it is characterised in that pump vapour-liquid bulk testing
Insulation is all taken in all parts of device, and the guarantor being made up of extruded polystyrene foamed plastics is wound on the outside of pipeline
Adiabator.
3. pump according to claim 1 vapour-liquid bulk testing device, it is characterised in that in the gas supply unit
Gas transfer pipeline (16) is vertical with vapour-liquid mixing arrangement (5) to be communicated.
4. pump according to claim 3 vapour-liquid bulk testing device, it is characterised in that in the liquid carrying unit
Liquid transmission pipeline (2) and vapour-liquid mixing arrangement (5) coaxial line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610917655.4A CN106567827A (en) | 2016-10-20 | 2016-10-20 | Vapor-liquid mixing test device for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610917655.4A CN106567827A (en) | 2016-10-20 | 2016-10-20 | Vapor-liquid mixing test device for pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106567827A true CN106567827A (en) | 2017-04-19 |
Family
ID=58533204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610917655.4A Pending CN106567827A (en) | 2016-10-20 | 2016-10-20 | Vapor-liquid mixing test device for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106567827A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444718A (en) * | 2018-01-30 | 2018-08-24 | 清华大学 | Pump and the dual-purpose multiphase nature testboard of turbine and its test method |
| CN108825483A (en) * | 2018-05-25 | 2018-11-16 | 江苏大学 | A kind of pump full working scope testing stand |
| FR3096092A1 (en) * | 2019-05-16 | 2020-11-20 | Safran Aircraft Engines | Device and method for improved hydraulic part of a turbomachine |
| CN113236532A (en) * | 2021-05-08 | 2021-08-10 | 中国船舶重工集团公司第七一一研究所 | Energy-saving type water vapor compressor test device and test method thereof |
| CN113503248A (en) * | 2021-07-15 | 2021-10-15 | 东风柳州汽车有限公司 | Oil pump testing device |
| CN114563492A (en) * | 2022-01-24 | 2022-05-31 | 中煤科工集团沈阳研究院有限公司 | A kind of gas sensor inspection device and test method for pipeline |
-
2016
- 2016-10-20 CN CN201610917655.4A patent/CN106567827A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444718A (en) * | 2018-01-30 | 2018-08-24 | 清华大学 | Pump and the dual-purpose multiphase nature testboard of turbine and its test method |
| CN108444718B (en) * | 2018-01-30 | 2019-06-04 | 清华大学 | Pump and turbine dual-use multi-phase characteristic test bench and test method thereof |
| CN108825483A (en) * | 2018-05-25 | 2018-11-16 | 江苏大学 | A kind of pump full working scope testing stand |
| FR3096092A1 (en) * | 2019-05-16 | 2020-11-20 | Safran Aircraft Engines | Device and method for improved hydraulic part of a turbomachine |
| US11561147B2 (en) | 2019-05-16 | 2023-01-24 | Safran Aircraft Engines | Device and method for improved testing of a hydraulic part for a turbomachine |
| CN113236532A (en) * | 2021-05-08 | 2021-08-10 | 中国船舶重工集团公司第七一一研究所 | Energy-saving type water vapor compressor test device and test method thereof |
| CN113503248A (en) * | 2021-07-15 | 2021-10-15 | 东风柳州汽车有限公司 | Oil pump testing device |
| CN113503248B (en) * | 2021-07-15 | 2023-12-19 | 东风柳州汽车有限公司 | Oil pump testing device |
| CN114563492A (en) * | 2022-01-24 | 2022-05-31 | 中煤科工集团沈阳研究院有限公司 | A kind of gas sensor inspection device and test method for pipeline |
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