CN113776737B - Gas tightness pumping pressure equipment and gas tightness inspection method for DF (double fuel) series double fuel host - Google Patents
Gas tightness pumping pressure equipment and gas tightness inspection method for DF (double fuel) series double fuel host Download PDFInfo
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- CN113776737B CN113776737B CN202110922789.6A CN202110922789A CN113776737B CN 113776737 B CN113776737 B CN 113776737B CN 202110922789 A CN202110922789 A CN 202110922789A CN 113776737 B CN113776737 B CN 113776737B
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- 239000000446 fuel Substances 0.000 title claims abstract description 48
- 238000005086 pumping Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims description 7
- 238000007689 inspection Methods 0.000 title claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 156
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 46
- 239000010720 hydraulic oil Substances 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 8
- 238000010998 test method Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/025—Details with respect to the testing of engines or engine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The pumping equipment comprises a nitrogen loop and a sealing oil loop, wherein the nitrogen loop comprises a high-pressure nitrogen inlet, a low-pressure nitrogen inlet, a high-pressure regulating valve, a first needle valve, a second needle valve, a first check valve and a second check valve, the sealing oil loop comprises a compressed air input port, a compressed air source treatment triplet, an external adjustable pressure reducing valve, an internal air source pressure reducing valve, a pneumatic control direction valve, a gas-liquid booster pump, a third check valve, a first stop valve, a filter, an oil tank, an oil suction filter, a fourth check valve and a second stop valve, the pumping equipment is started, the sealing loop is pumped, and when oil pressure reaches a target value, the nitrogen loop is opened, and the tightness and the functionality of the dual-fuel host are tested. The invention realizes the pumping of the gas pipeline and the sealed oil pipe by using one set of equipment, and has the advantages of compact structure, convenient transportation, strong adaptability, convenient operation and high reliability.
Description
Technical Field
The invention relates to a manufacturing process of a marine low-speed diesel engine, in particular to gas tightness pumping pressure equipment and a gas tightness inspection method for a DF (double fuel) series double fuel host, and belongs to the technical field of diesel engine manufacturing.
Background
Due to stricter emissions regulations and high fuel costs throughout the world, marine low-speed diesel engines have been developed along with the trend of multi-fuel, and DF-series hosts are one of dual-fuel diesel engines. Because natural gas is inflammable and explosive, if leakage occurs, a great potential safety hazard is generated, so that the air tightness of the main engine needs to be tested, which is an indispensable content in the test run of the DF main engine.
Disclosure of Invention
The invention aims to provide gas tightness pumping equipment and a gas tightness checking method for a DF (double-fuel) series double-fuel host machine, which are used for detecting the gas tightness of gas components of the DF series double-fuel host machine and checking whether leakage exists in the installation of a cylinder cover and a gas block and whether the function of an inlet valve and an outlet valve of the gas block is normal or not. The method has the advantages of simple operation, convenient use and good system reliability.
The technical scheme of the invention is as follows:
a gas tightness pumping pressure equipment for DF series double fuel host computer which characterized in that: the pumping pressure equipment is of a module prying structure and comprises a nitrogen loop and a sealing oil loop, wherein the nitrogen loop is used for connecting high-pressure nitrogen and low-pressure nitrogen and inputting nitrogen to the dual-fuel host, and the sealing oil loop is used for providing hydraulic oil for inspection for the dual-fuel host;
the nitrogen loop comprises a high-pressure nitrogen inlet, a low-pressure nitrogen inlet, a high-pressure regulating valve, a first needle valve, a second needle valve, a first check valve and a second check valve, wherein the high-pressure nitrogen inlet is sequentially connected with the high-pressure regulating valve, the first check valve and the first needle valve from upstream to downstream, the downstream of the first needle valve is connected with the dual-fuel host, the low-pressure nitrogen inlet is connected with the upstream of the first needle valve through the second check valve, the second needle valve is used for pressure relief, and the low-pressure nitrogen inlet is connected with the downstream of the first needle valve;
the sealed oil loop comprises a compressed air input port, a compressed air source treatment triple piece, an external adjustable pressure reducing valve, an internal air source pressure reducing valve and a pneumatic control direction valve, wherein the compressed air source treatment triple piece, the external adjustable pressure reducing valve, the internal air source pressure reducing valve and the pneumatic control direction valve are sequentially connected from upstream to downstream, the downstream of the filter is connected with the dual-fuel host, the oil tank is used for storing hydraulic oil and is provided with an oil filling port, the oil suction filter is arranged in the hydraulic oil in the oil tank, the fourth check valve is connected with the pneumatic liquid pressure pump, the second check valve is used for pressure relief, one end of the second check valve is connected with the downstream of the first check valve, and the other end of the second check valve is led into the oil tank.
Further, a high-pressure muffler is connected to the downstream of the second needle valve.
Further, a liquid level meter is arranged on the oil tank.
Further, the downstream of the first stop valve is connected with a pressure gauge through a pressure gauge switch.
Further, the high-pressure nitrogen inlet is connected with the high-pressure regulating valve through a high-pressure hose and a quick connector, the low-pressure nitrogen inlet is connected with the second one-way valve through the high-pressure hose and the quick connector, and the first needle valve is connected with the dual-fuel host through the high-pressure hose and the quick connector.
Further, the filter is connected with the dual fuel host through a high pressure hose and a quick connector.
Further, the input pressure of the high-pressure nitrogen is 20-150bar, and the input pressure of the low-pressure nitrogen is 16-20bar.
The other technical scheme of the invention is as follows:
the method for testing the tightness of DF series dual-fuel host machine realized by the gas tightness pumping device comprises the following steps:
1) Filling the oil tank with hydraulic oil, connecting the high-pressure nitrogen inlet with high-pressure nitrogen, connecting the low-pressure nitrogen inlet with low-pressure nitrogen, connecting the compressed air inlet with compressed air, and connecting the first needle valve and the filter with corresponding interfaces on the dual-fuel host through a high-pressure hose and a quick connector respectively;
2) Starting the pumping equipment, pumping the sealed loop, and adjusting the pressure of the loop through the external adjustable pressure reducing valve;
3) When the oil pressure reaches a target value, opening the nitrogen loop, closing the nitrogen loop after the pressure rises to the target value, and performing the air tightness and the functionality test of the dual-fuel host;
4) After the test is finished, a second needle valve of the nitrogen loop is opened for pressure relief, and then a second stop valve of the sealing oil loop is opened for pressure relief;
5) And when an emergency situation occurs, stopping the test immediately, and opening the second needle valve and the second stop valve to release pressure on the pipeline.
The gas tightness pumping pressure equipment for the DF series double fuel host has the following characteristics:
(1) the device is designed into a sledge, has compact structure and is convenient for transportation;
(2) pneumatic automatic pressure regulation closed-loop control;
(3) various types of hydraulic oil may be used: the middle petrochemicals 3008, 32 hydraulic oil and 46 hydraulic oil have strong adaptability;
(4) the pipe fitting, valve element, filter and other devices of the equipment are made of stainless steel materials, and the corrosion resistance is excellent.
The invention achieves the technical effects that:
(1) the device realizes that a set of equipment is used for pumping the fuel gas pipeline and the sealing oil pipe simultaneously so as to check the functional operation of the fuel gas control block;
(2) the pumping pressure medium used by the invention has high safety, does not influence the subsequent gas motor car, and has the advantages of simple flow and convenient operation;
(3) the function of reducing the pressure of the high-pressure nitrogen is realized, the external high-pressure nitrogen can be used after the pressure is reduced to the target pressure, and the device is simple and safe;
(4) the automatic oil return function after the pressure relief of the hydraulic circuit is realized, the working environment is improved, and the consumption of oil is saved;
(5) simple structure, less control and functional parts, and high equipment reliability.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
In the drawing the view of the figure,
a1-a high-pressure nitrogen inlet, A2-a low-pressure nitrogen inlet, A3-a high-pressure regulating valve, A4-a first needle valve, A5-a second needle valve, A6-a high-pressure silencer, A7-a second one-way valve, A8-a first one-way valve, B1-a compressed air inlet, B2-a liquid level meter, B3-a fuel filler, B4-an oil suction filter, B5-a gas-liquid booster pump, B6-a compressed air source treatment triplet, B7-a pneumatic control direction valve, B8-a first stop valve, B9-a pressure gauge switch, B10-a pressure gauge, B11-a filter, B12-a second stop valve, B13-an internal air source pressure reducing valve, B14-an external adjustable pressure reducing valve, B15-a third one-way valve, B16-a fourth one-way valve and B17-an oil tank.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, which should not be construed as limiting the scope of the invention as claimed.
The invention is used for detecting the tightness of a gas component of a DF series dual-fuel host, referring to FIG. 1, the pump pressure equipment is illustrated as a modular prying structure, and the invention comprises two loops: the first loop is a nitrogen loop, and the main function is to access high-pressure nitrogen and low-pressure nitrogen and input the nitrogen to the dual-fuel host; the second loop is a seal oil loop, and 20bar seal oil is provided for the seal performance inspection of the dual-fuel host.
Referring to fig. 1, the nitrogen circuit includes a high-pressure nitrogen inlet A1, a low-pressure nitrogen inlet A2, a high-pressure regulating valve A3, a first needle valve A4, a second needle valve A5, a first check valve A8, a second check valve A7, and a high-pressure muffler A6. The highest pressure of the high-pressure nitrogen of the nitrogen loop is designed to be 150bar, and the high-pressure nitrogen can be depressurized to 16-20bar; and an external pipeline is independently matched, and low-pressure compressed nitrogen is directly connected.
The specific device functions are as follows:
a high-pressure nitrogen inlet A1 for inputting high-pressure nitrogen.
A low-pressure nitrogen inlet A2 for inputting low-pressure nitrogen.
A high-pressure regulating valve A3 with the highest input pressure of 150bar and used for realizing stepless regulation of the loop pressure within 0-150 bar; a first needle valve A4 for cutting off the circuit.
A second needle valve A5 for rapidly releasing the pressure in the circuit.
The high-pressure muffler A6 is used for silencing when the pressure is released by the loop.
A first one-way valve A8 and a second one-way valve A7 for preventing backflow of compressed gas in the circuit.
The connection relation of the devices is as follows:
the high-pressure nitrogen inlet A1 is sequentially connected with a high-pressure regulating valve A3, a first one-way valve A8 and a first needle valve A4 from upstream to downstream, and the downstream of the first needle valve A4 is connected with a dual-fuel host; the low-pressure nitrogen inlet A2 is connected upstream of the first needle valve A4 through a second check valve A7, the second needle valve A5 is connected downstream of the first needle valve A4, and the high-pressure muffler A6 is connected downstream of the second needle valve A5. The high-pressure nitrogen inlet A1 is connected with the high-pressure regulating valve A3 through a high-pressure hose and a quick connector, the low-pressure nitrogen inlet A2 is connected with the second one-way valve A7 through the high-pressure hose and the quick connector, and the first needle valve A4 is connected with the dual-fuel host through the high-pressure hose and the quick connector.
The model of the high-pressure hose is CJEN19.950.1800. The number of quick connectors is CJEN10.125.6203 and the number of quick connectors is CJEN 10.125.1203 and 1.
Referring to fig. 1, the sealed oil circuit includes a compressed air input port B1, a compressed air source processing triple piece B6, an external adjustable pressure reducing valve B14, an internal air source pressure reducing valve B13, a pneumatic control direction valve B7, a gas-liquid booster pump B5, a third check valve B15, a first stop valve B8, a filter B11, a pressure gauge B10, an oil tank B17, an oil absorbing filter B4, a fourth check valve B16 and a second stop valve B12. The design pressure of the sealing oil circuit is 20bar, the highest working pressure is 25bar, and the output pressure can be adjusted steplessly between 20bar and 25 bar.
The specific device functions are as follows:
a compressed air input port B1 for inputting compressed air;
a compressed air source treatment triplet B6 for treating compressed air;
a gas-liquid booster pump B5;
a built-in air source pressure reducing valve B13 is used for limiting the highest input air pressure of the air-liquid booster pump B5;
an external adjustable pressure reducing valve B14 is used for adjusting the applicable pressure range of each path;
the pneumatic control direction valve B7 is used for controlling the loading and unloading of the gas-liquid booster pump B5;
a first shut-off valve B8 for shutting off the circuit;
a second shut-off valve B12 for rapidly releasing the pressure in the circuit;
the oil tank B17 is used for storing hydraulic oil;
a pressure gauge B10 for measuring the pressure in the circuit;
the filter B11 had a filtration accuracy of 2 μm and a filtration flow rate of not less than 200L/h.
The connection relation of the devices is as follows:
the compressed air input port B1 is sequentially connected with the compressed air source treatment triple piece B6, the external adjustable pressure reducing valve B14, the built-in air source pressure reducing valve B13, the pneumatic control direction valve B7, the air-liquid booster pump B5, the third check valve B15, the first stop valve B8 and the filter B11 from upstream to downstream, the downstream of the filter B11 is connected with the dual-fuel host through a high-pressure hose and a quick connector, the oil tank B17 is provided with the oil filling port B3 and the liquid level meter B2, the oil absorbing filter B4 is arranged in hydraulic oil in the oil tank B17, the air-liquid booster pump B5 is connected through the fourth check valve B16, one end of the second stop valve B12 is connected with the downstream of the first stop valve B8, the other end of the second stop valve B12 is connected with the inside of the oil tank B17, and the pressure meter B10 is connected with the downstream of the first stop valve B8 through the pressure meter switch B9.
The high-pressure hose is 1 high-pressure oil pipe with the size of CJEN19.950.1800 and is provided with a transparent protective sleeve outside; a male and female quick connector is connected to two ends of the high-pressure hose, the female connector is CJEN10.125.1202, and the male connector is CJEN10.125.5252.
The invention relates to an air tightness test method of a DF series dual-fuel host, which comprises the following specific steps:
(1) the oil tank of the equipment is filled with hydraulic oil, the compressed air input port and the nitrogen input port of the equipment are connected with the compressed air and nitrogen through hoses, and the hydraulic oil output port and the nitrogen output port of the equipment are connected with corresponding interfaces on the gas component through high-pressure hoses.
(2) And starting the device to pump the sealed loops, wherein the external adjustable pressure reducing valve can adjust each loop within the applicable pressure range.
(3) When the oil pressure reaches the target value, the nitrogen loop control switch is turned on, and when the pressure rises to the target value, the gas loop control switch is turned off, and the gas block air tightness and functionality test is started.
(4) After the test is finished, the second needle valve of the nitrogen loop is opened to release pressure, and the second stop valve of the sealing oil loop is opened to release pressure after the nitrogen loop is released.
(5) In case of emergency, the pump pressure should be stopped immediately, and the second needle valve and the second shut-off valve are opened to bleed the pipeline.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made according to the content of the present application should be considered to be within the technical scope of the present invention.
Claims (8)
1. A gas tightness pumping pressure equipment for DF series double fuel host computer which characterized in that: the pumping pressure equipment is of a module prying structure and comprises a nitrogen loop and a sealing oil loop, wherein the nitrogen loop is used for connecting high-pressure nitrogen and low-pressure nitrogen and inputting nitrogen to the dual-fuel host, and the sealing oil loop is used for providing hydraulic oil for inspection for the dual-fuel host;
the nitrogen loop comprises a high-pressure nitrogen inlet, a low-pressure nitrogen inlet, a high-pressure regulating valve, a first needle valve, a second needle valve, a first check valve and a second check valve, wherein the high-pressure nitrogen inlet is sequentially connected with the high-pressure regulating valve, the first check valve and the first needle valve from upstream to downstream, the downstream of the first needle valve is connected with the dual-fuel host, the low-pressure nitrogen inlet is connected with the upstream of the first needle valve through the second check valve, the second needle valve is used for pressure relief, and the low-pressure nitrogen inlet is connected with the downstream of the first needle valve;
the sealed oil loop comprises a compressed air input port, a compressed air source treatment triple piece, an external adjustable pressure reducing valve, an internal air source pressure reducing valve and a pneumatic control direction valve, wherein the compressed air source treatment triple piece, the external adjustable pressure reducing valve, the internal air source pressure reducing valve and the pneumatic control direction valve are sequentially connected from upstream to downstream, the downstream of the filter is connected with the dual-fuel host, the oil tank is used for storing hydraulic oil and is provided with an oil filling port, the oil suction filter is arranged in the hydraulic oil in the oil tank, the fourth check valve is connected with the pneumatic liquid pressure pump, the second check valve is used for pressure relief, one end of the second check valve is connected with the downstream of the first check valve, and the other end of the second check valve is led into the oil tank.
2. The gas tightness pumping device for DF-series dual fuel host according to claim 1, characterized by: and a high-pressure muffler is connected to the downstream of the second needle valve.
3. The gas tightness pumping device for DF-series dual fuel host according to claim 1, characterized by: the oil tank is provided with a liquid level meter.
4. The gas tightness pumping device for DF-series dual fuel host according to claim 1, characterized by: the downstream of the first stop valve is connected with a pressure gauge through a pressure gauge switch.
5. The gas tightness pumping device for DF-series dual fuel host according to claim 1, characterized by: the high-pressure nitrogen inlet is connected with the high-pressure regulating valve through a high-pressure hose and a quick connector, the low-pressure nitrogen inlet is connected with the second one-way valve through the high-pressure hose and the quick connector, and the first needle valve is connected with the dual-fuel host through the high-pressure hose and the quick connector.
6. The gas tightness pumping device for DF-series dual fuel host according to claim 1, characterized by: the filter is connected with the dual-fuel host through a high-pressure hose and a quick connector.
7. The gas tightness pumping device for DF-series dual fuel host according to claim 1, characterized by: the input pressure of the high-pressure nitrogen is 20-150bar, and the input pressure of the low-pressure nitrogen is 16-20bar.
8. A method for testing the tightness of DF-series dual fuel hosts implemented by the gas tightness pumping device of claim 1, characterized in that: the air tightness test method comprises the following specific steps:
1) Filling the oil tank with hydraulic oil, connecting the high-pressure nitrogen inlet with high-pressure nitrogen, connecting the low-pressure nitrogen inlet with low-pressure nitrogen, connecting the compressed air inlet with compressed air, and connecting the first needle valve and the filter with corresponding interfaces on the dual-fuel host through a high-pressure hose and a quick connector respectively;
2) Starting the pumping equipment, pumping the sealed oil loop, and adjusting the pressure of the loop through the external adjustable pressure reducing valve;
3) When the oil pressure reaches a target value, opening the nitrogen loop, closing the nitrogen loop after the pressure rises to the target value, and performing the air tightness and the functionality test of the dual-fuel host;
4) After the test is finished, a second needle valve of the nitrogen loop is opened for pressure relief, and then a second stop valve of the sealing oil loop is opened for pressure relief;
5) And when an emergency situation occurs, stopping the test immediately, and opening the second needle valve and the second stop valve to release pressure on the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110922789.6A CN113776737B (en) | 2021-08-12 | 2021-08-12 | Gas tightness pumping pressure equipment and gas tightness inspection method for DF (double fuel) series double fuel host |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110922789.6A CN113776737B (en) | 2021-08-12 | 2021-08-12 | Gas tightness pumping pressure equipment and gas tightness inspection method for DF (double fuel) series double fuel host |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113776737A CN113776737A (en) | 2021-12-10 |
| CN113776737B true CN113776737B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110922789.6A Active CN113776737B (en) | 2021-08-12 | 2021-08-12 | Gas tightness pumping pressure equipment and gas tightness inspection method for DF (double fuel) series double fuel host |
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Citations (5)
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|---|---|---|---|---|
| US5795995A (en) * | 1996-03-22 | 1998-08-18 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Leak tester and leak testing method |
| CN106855451A (en) * | 2015-12-09 | 2017-06-16 | 上海华林工业气体有限公司 | A kind of device and method that airtight test is carried out using liquid nitrogen supercharging gasification |
| CN107796629A (en) * | 2017-07-28 | 2018-03-13 | 天津大学 | Simulate the constant volume combustion bomb System and method for of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine |
| CN112444397A (en) * | 2020-11-09 | 2021-03-05 | 上海中船三井造船柴油机有限公司 | Air tightness testing device and method for LGIP host gas module |
| CN112945534A (en) * | 2021-02-07 | 2021-06-11 | 浙江燃创透平机械股份有限公司 | Gas turbine component air flow test bed and test method |
-
2021
- 2021-08-12 CN CN202110922789.6A patent/CN113776737B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5795995A (en) * | 1996-03-22 | 1998-08-18 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Leak tester and leak testing method |
| CN106855451A (en) * | 2015-12-09 | 2017-06-16 | 上海华林工业气体有限公司 | A kind of device and method that airtight test is carried out using liquid nitrogen supercharging gasification |
| CN107796629A (en) * | 2017-07-28 | 2018-03-13 | 天津大学 | Simulate the constant volume combustion bomb System and method for of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine |
| CN112444397A (en) * | 2020-11-09 | 2021-03-05 | 上海中船三井造船柴油机有限公司 | Air tightness testing device and method for LGIP host gas module |
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| Title |
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| 燃料电池用气密性试验台的分析与开发;陈光;郝冬;王晓兵;王仁广;;汽车工程师;20200425(第04期);全文 * |
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| CN113776737A (en) | 2021-12-10 |
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