CN103592115A - Diaphragm capsule valve stroke test device and using method thereof - Google Patents
Diaphragm capsule valve stroke test device and using method thereof Download PDFInfo
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- CN103592115A CN103592115A CN201310577667.3A CN201310577667A CN103592115A CN 103592115 A CN103592115 A CN 103592115A CN 201310577667 A CN201310577667 A CN 201310577667A CN 103592115 A CN103592115 A CN 103592115A
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Abstract
The invention discloses a diaphragm capsule valve stroke test device. The diaphragm capsule valve stroke test device comprises a workbench (1), a vacuum chamber (2), an instrument box (3), a vibrator (4), a resistive heater (5), a dial indicator (6), a test tool (7), an evaporator (8), a vacuum pump (9), a manual-operation switch valve (10), an automatic switch valve (11), an automatic vent valve (12), a manual-operation vent valve (13), a condenser (14), a refrigeration compressor (15), an absolute pressure sensor (16) and a temperature measuring sensor (17). The vacuum chamber (2) comprises a bell jar type structure and a lower chassis. The bell jar type structure is arranged above the lower chassis. A small-hole structure is arranged on the lower chassis, and the vacuum chamber (2) and the instrument box (3) are fixedly installed on the workbench (1). The high-precision absolute pressure sensor is used for measuring pressure to control the vacuum pump and an electromagnetic valve to be opened and closed, and automatic control over vacuum pressure is achieved. Test precision and test efficiency are greatly improved, and the diaphragm capsule valve stroke test device has larger economic and social values.
Description
Technical field
The present invention relates to structural design and the applied technical field of bellows valve stroke test unit, a kind of bellows valve stroke test unit and using method are provided especially.
Background technology
The effect of engine high-altitude valve is to regulate lubricating system chamber pressure, guarantees that engine lubrication system works in whole flight envelope; Bellows-type bellows valve is a significant components of high-altitude valve, fills a certain amount of argon gas in chamber, is subject to pressure, the temperature variation of ambient atmosphere, and the impulse stroke of corrugated tube changes adjustments of gas circulation area; So require to measure the impulse stroke of bellows valve under uniform temperature, vacuum, check the performance of this assembly; The test unit that carries out at present this part in industry only has heating function, is subject to season such environmental effects large, is difficult to the constant of warranty test environment temperature, and vacuum pressure need draw through artificial conversion, and process is complicated, inefficiency.
People urgently wish to obtain a kind of technique effect good bellows valve stroke test unit and using method.
Summary of the invention
The object of this invention is to provide formation constant temperature, negative pressure experimental enviroment in the good little space of a kind of technique effect, carry out bellows valve stroke test, reduce the impact that environmental factor causes test, improve test efficiency and test accuracy bellows valve stroke test unit and using method.
The invention provides a kind of bellows valve stroke test unit, described bellows valve stroke test unit is constructed as follows: worktable 1, vacuum chamber 2 and instrument box 3, electromagnetic shaker 4, resistive heater 5, dial gauge 6, measuring tool 7, evaporator 8, vacuum pump 9, manual switch valve 10, automatic switch valve 11, automatic blow off valve valve air relief 12, Manual air-release valves 13, condenser 14, refrigeration compressor 15, absolute pressure sensor 16, temperature probe 17; Described vacuum chamber 2 comprises bell-jar structure and low bottom-disc, described bell-jar structure is positioned at low bottom-disc top, described low bottom-disc is provided with small structure, for measuring tool 7, sensor, conductive connector being installed and for the intake and exhaust of vacuum chamber, vacuum chamber 2 and instrument box 3 are fixedly mounted on worktable 1;
Describedly for vacuumizing with vacuum pump 9, refrigeration compressor 15 and the condenser 14 of the temperature of cooling vacuum chamber 2 to vacuum chamber 2, be positioned at worktable 1 inside; The long 1000mm of described worktable 1, wide 700mm, high 810mm, respectively there are two doors the front and back of worktable 1; Described electromagnetic shaker 4, resistive heater 5, dial gauge 6, measuring tool 7 and evaporator 8 are positioned at vacuum chamber 2; Manual switch valve 10, automatic switch valve 11, automatic blow off valve valve air relief 12 and Manual air-release valves 13 are arranged on for the instrument box 3 of appliance controling element is installed;
Described refrigeration compressor 15, condenser 14 and evaporator 8 form electrical connection, vacuum pump 9 is by manual switch valve 10, automatic switch valve 11, automatic blow off valve valve air relief 12 and Manual air-release valves 13 are controlled and are vacuumized and regulate vacuum chamber 2 internal pressures, described for measuring the absolute pressure sensor 16 of vacuum chamber 2 internal pressures and temperature and small structure measurement vacuum chamber 2 internal pressures and the temperature that temperature probe 17 passes low bottom-disc, described resistive heater 5 is positioned on the low bottom-disc of vacuum chamber 2, described measuring tool 7 stands in vacuum chamber 2 by pillar, the below of measuring tool 7 is processed with for connecting by the screw thread of test specimen, center drilling welding chuck, described dial gauge 6 inserts in vacuum chamber 2 by table bar from the small structure of vacuum chamber 2 low bottom-discs, by clamping screw, control vacuum chamber 2 insertion depths,
The bell-jar structure of described vacuum chamber 2 is for ease of observing the glass bell jar formula structure of dial gauge reading, and described low bottom-disc adopts glass-reinforced plastic material.Described low bottom-disc diameter is about φ 340mm;
On described low bottom-disc, be provided with the ring-shaped groove of opening for resistive heater 5.
Described evaporator 8 is red copper evaporator 8.Described red copper evaporator 8 is specially 4 circles.
For guaranteeing the sealing of vacuum chamber, between described glass bell jar formula structure and low bottom-disc, be coated with vacuum grease, the junction of the small structure of described low bottom-disc and glass bell jar formula structure is provided with rubber gasket.
The using method of described bellows valve stroke test unit, concrete using method is as follows:
The using method of described bellows valve stroke test unit, concrete using method is as follows:
1. bellows is connected and is fixed with the external thread of measuring tool 7 lower ends;
2. dial gauge 6 is adjusted to zero-bit, puts into true bell-jar structure;
3. close manual switch valve 10 and Manual air-release valves 13; System has manual operation and two kinds of modes of automatic operation, is manually used for debug process, when automatic operation, first will guarantee that manual switch valve 10 and Manual air-release valves 13 close.
4. by the temperature probe 17 in vacuum chamber 2, control resistive heater 5 and refrigeration compressor 15 work, make temperature maintain 25 ± 1 ℃;
5. starting shock device 4, produce vibration; Prevent bellows valve and its peripheral components generation clamping stagnation of bellows-type, affect the accuracy of stroke measurment;
6. open automatic switch valve 11, start vacuum pump 9, vacuumize;
7. when the pressure digital display instrument of absolute pressure sensor 16 shows that reading reaches 18.6KPa, automatic switch valve 11 is closed, and reads rapidly dial gauge reading;
8. close electromagnetic shaker 4, vacuum pump 9, open automatic blow off valve valve air relief 12, take off bell-jar structure, take out bellows, close general supply, test complete.
The working substance steam that refrigeration compressor 15 sucks from evaporator 8 lower pressure out, make it after pressure raises to send into condenser 14, in condenser 14, be condensed into the liquid that pressure is higher, after throttling valve throttling, become after the liquid that pressure is lower, send into evaporator 8, heat absorption evaporation in evaporator 8 and become the steam that pressure is lower, send into again the entrance of refrigeration compressor 15, thereby complete refrigeration cycle.
Described bellows valve stroke test unit has adopted Resistant heating and mechanical refrigeration mode in little spatial dimension, guarantees the constant temperature test environment of 25 ± 1 ℃.By high precision absolute pressure sensor gaging pressure control vacuum pump and solenoid valve, open and close, realize the automatic control of vacuum pressure; There is temperature automatically controlled function, reduced the impact that environmental factor causes test, all can carry out throughout the year.Test accuracy and test efficiency significantly improve, and have larger economy and social value.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is bellows valve stroke test unit profile schematic diagram;
Fig. 2 is A-A place cut-open view in Fig. 1;
Fig. 3 is B-B place cut-open view in Fig. 2;
Fig. 4 is bellows valve stroke test unit schematic diagram.
Embodiment
The present embodiment provides a kind of bellows valve stroke test unit, and described bellows valve stroke test unit is constructed as follows: worktable 1, vacuum chamber 2 and instrument box 3, electromagnetic shaker 4, resistive heater 5, dial gauge 6, measuring tool 7, evaporator 8, vacuum pump 9, manual switch valve 10, automatic switch valve 11, automatic blow off valve valve air relief 12, Manual air-release valves 13, condenser 14, refrigeration compressor 15, absolute pressure sensor 16, temperature probe 17;
Described vacuum chamber 2 comprises bell-jar structure and low bottom-disc, described bell-jar structure is positioned at low bottom-disc top, described low bottom-disc is provided with small structure, for measuring tool 7, sensor, conductive connector being installed and for the intake and exhaust of vacuum chamber, vacuum chamber 2 and instrument box 3 are fixedly mounted on worktable 1;
Describedly for vacuumizing with vacuum pump 9, refrigeration compressor 15 and the condenser 14 of the temperature of cooling vacuum chamber 2 to vacuum chamber 2, be positioned at worktable 1 inside; The long 1000mm of described worktable 1, wide 700mm, high 810mm, respectively there are two doors the front and back of worktable 1; Described electromagnetic shaker 4, resistive heater 5, dial gauge 6, measuring tool 7 and evaporator 8 are positioned at vacuum chamber 2; Manual switch valve 10, automatic switch valve 11, automatic blow off valve valve air relief 12 and Manual air-release valves 13 are arranged on for the instrument box 3 of appliance controling element is installed;
Described refrigeration compressor 15, condenser 14 and evaporator 8 form electrical connection, vacuum pump 9 is by manual switch valve 10, automatic switch valve 11, automatic blow off valve valve air relief 12 and Manual air-release valves 13 are controlled and are vacuumized and regulate vacuum chamber 2 internal pressures, described for measuring the absolute pressure sensor 16 of vacuum chamber 2 internal pressures and temperature and small structure measurement vacuum chamber 2 internal pressures and the temperature that temperature probe 17 passes low bottom-disc, described resistive heater 5 is positioned on the low bottom-disc of vacuum chamber 2, described measuring tool 7 stands in vacuum chamber 2 by pillar, the below of measuring tool 7 is processed with for connecting by the screw thread of test specimen, center drilling welding chuck, described dial gauge 6 inserts in vacuum chamber 2 by table bar from the small structure of vacuum chamber 2 low bottom-discs, by clamping screw, control vacuum chamber 2 insertion depths,
The bell-jar structure of described vacuum chamber 2 is for ease of observing the glass bell jar formula structure of dial gauge reading, and described low bottom-disc adopts glass-reinforced plastic material.Described low bottom-disc diameter is about φ 340mm;
On described low bottom-disc, be provided with the ring-shaped groove of opening for resistive heater 5.
Described evaporator 8 is red copper evaporator 8.Described red copper evaporator 8 is specially 4 circles.
For guaranteeing the sealing of vacuum chamber, between described glass bell jar formula structure and low bottom-disc, be coated with vacuum grease, the junction of the small structure of described low bottom-disc and glass bell jar formula structure is provided with rubber gasket.
The using method of described bellows valve stroke test unit, concrete using method is as follows:
The using method of described bellows valve stroke test unit, concrete using method is as follows:
1. bellows is connected and is fixed with the external thread of measuring tool 7 lower ends;
2. dial gauge 6 is adjusted to zero-bit, puts into true bell-jar structure;
3. close manual switch valve 10 and Manual air-release valves 13; System has manual operation and two kinds of modes of automatic operation, is manually used for debug process, when automatic operation, first will guarantee that manual switch valve 10 and Manual air-release valves 13 close.
4. by the temperature probe 17 in vacuum chamber 2, control resistive heater 5 and refrigeration compressor 15 work, make temperature maintain 25 ± 1 ℃;
5. starting shock device 4, produce vibration; Prevent bellows valve and its peripheral components generation clamping stagnation of bellows-type, affect the accuracy of stroke measurment;
6. open automatic switch valve 11, start vacuum pump 9, vacuumize;
7. when the pressure digital display instrument of absolute pressure sensor 16 shows that reading reaches 18.6KPa, automatic switch valve 11 is closed, and reads rapidly dial gauge reading;
8. close electromagnetic shaker 4, vacuum pump 9, open automatic blow off valve valve air relief 12, take off bell-jar structure, take out bellows, close general supply, test complete.
The working substance steam that refrigeration compressor 15 sucks from evaporator 8 lower pressure out, make it after pressure raises to send into condenser 14, in condenser 14, be condensed into the liquid that pressure is higher, after throttling valve throttling, become after the liquid that pressure is lower, send into evaporator 8, heat absorption evaporation in evaporator 8 and become the steam that pressure is lower, send into again the entrance of refrigeration compressor 15, thereby complete refrigeration cycle.
Described bellows valve stroke test unit has adopted Resistant heating and mechanical refrigeration mode in little spatial dimension, guarantees the constant temperature test environment of 25 ± 1 ℃.By high precision absolute pressure sensor gaging pressure control vacuum pump and solenoid valve, open and close, realize the automatic control of vacuum pressure; There is temperature automatically controlled function, reduced the impact that environmental factor causes test, all can carry out throughout the year.Test accuracy and test efficiency significantly improve, and have larger economy and social value.
Claims (8)
1. a bellows valve stroke test unit, is characterized in that: described bellows valve stroke test unit is constructed as follows: worktable (1), vacuum chamber (2) and instrument box (3), electromagnetic shaker (4), resistive heater (5), dial gauge (6), measuring tool (7), evaporator (8), vacuum pump (9), manual switch valve (10), automatic switch valve (11), automatic blow off valve valve air relief (12), Manual air-release valves (13), condenser (14), refrigeration compressor (15), absolute pressure sensor (16) and temperature probe (17), described vacuum chamber (2) comprises bell-jar structure and low bottom-disc, and described bell-jar structure is positioned at low bottom-disc top, and described low bottom-disc is provided with small structure, and vacuum chamber (2) and instrument box (3) are fixedly mounted on worktable (1), described vacuum pump (9), refrigeration compressor (15) and condenser (14) are positioned at worktable (1) inside, described electromagnetic shaker (4), resistive heater (5), dial gauge (6), measuring tool (7) and evaporator (8) are positioned at vacuum chamber (2), manual switch valve (10), automatic switch valve (11), automatic blow off valve valve air relief (12) and Manual air-release valves (13) are arranged on instrument box (3), described refrigeration compressor (15), condenser (14) and evaporator (8) form electrical connection, vacuum pump (9) is by manual switch valve (10), automatic switch valve (11), automatic blow off valve valve air relief (12) and Manual air-release valves (13) are controlled and are vacuumized and regulate vacuum chamber (2) internal pressure, described absolute pressure sensor (16) and temperature probe (17) are measured vacuum chamber (2) internal pressure and temperature through the small structure of low bottom-disc, described resistive heater (5) is positioned on the low bottom-disc of vacuum chamber (2), described measuring tool (7) stands in vacuum chamber (2) by pillar, the below of measuring tool (7) is processed with screw thread, center drilling welding chuck, described dial gauge (6) inserts in vacuum chamber (2) by table bar from the small structure of vacuum chamber (2) low bottom-disc, by clamping screw, control vacuum chamber (2) insertion depth.
2. according to bellows valve stroke test unit described in claim 1, it is characterized in that: the bell-jar structure of described vacuum chamber (2) is glass bell jar formula structure, described low bottom-disc adopts glass-reinforced plastic material.
3. according to bellows valve stroke test unit described in claim 1, it is characterized in that: on described low bottom-disc, be provided with out ring-shaped groove.
4. according to bellows valve stroke test unit described in claim 2, it is characterized in that: on described low bottom-disc, be provided with out ring-shaped groove.
5. according to bellows valve stroke test unit described in claim 3, it is characterized in that: described evaporator (8) is red copper evaporator (8).
6. according to bellows valve stroke test unit described in claim 4, it is characterized in that: described evaporator (8) is red copper evaporator (8).
7. according to the described bellows valve of one of claim 1-6 stroke test unit, it is characterized in that: between glass bell jar formula structure and low bottom-disc, be coated with vacuum grease, the junction of the small structure of described low bottom-disc and glass bell jar formula structure is provided with rubber gasket.
8. a using method for bellows valve stroke test unit described in claim 1, concrete using method is as follows:
1. bellows is connected and is fixed with the external thread of measuring tool (7) lower end;
2. dial gauge (6) is adjusted to zero-bit, puts into bell-jar structure;
3. close manual switch valve (10) and Manual air-release valves (13);
4. by the temperature probe (17) in vacuum chamber (2), control resistive heater (5) and refrigeration compressor (15) work, make temperature maintain 25 ± 1 ℃;
5. starting shock device (4), produces vibration;
6. open automatic switch valve (11), start vacuum pump (9), vacuumize;
7. when the pressure digital display instrument of absolute pressure sensor (16) shows that reading reaches 18.6KPa, automatic switch valve (11) is closed, and reads rapidly dial gauge reading;
8. close electromagnetic shaker (4), vacuum pump (9), open automatic blow off valve valve air relief (12), take off bell-jar structure, take out bellows, close general supply, test complete.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577667.3A CN103592115B (en) | 2013-11-15 | 2013-11-15 | Diaphragm capsule valve stroke test device and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310577667.3A CN103592115B (en) | 2013-11-15 | 2013-11-15 | Diaphragm capsule valve stroke test device and using method thereof |
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| CN103592115A true CN103592115A (en) | 2014-02-19 |
| CN103592115B CN103592115B (en) | 2017-01-11 |
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| CN201310577667.3A Expired - Fee Related CN103592115B (en) | 2013-11-15 | 2013-11-15 | Diaphragm capsule valve stroke test device and using method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595476A (en) * | 2020-11-27 | 2021-04-02 | 中国航发四川燃气涡轮研究院 | Method and device for measuring rigidity of vacuum diaphragm capsule assembly of aero-engine |
| CN114136631A (en) * | 2021-10-20 | 2022-03-04 | 中国航发四川燃气涡轮研究院 | Aeroengine vacuum diaphragm capsule subassembly high temperature mechanical properties measuring equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094922A (en) * | 1998-09-09 | 2000-08-01 | Ziegler; Alex R. | Vacuum-insulated refrigerant line for allowing a vaccum chamber system with water-vapor cryocoil compressor to be locatable outside cleanroom |
| JP2004183038A (en) * | 2002-12-03 | 2004-07-02 | National Institute For Materials Science | METHOD FOR FORMING ELECTRODE WITH LOW CONTACT RESISTANCE ONTO n-TYPE CONDUCTIVE ZINC OXIDE |
| CN101078579A (en) * | 2006-05-25 | 2007-11-28 | 河南统一电器制造有限公司 | Cold or heat insulation box |
| CN101187551A (en) * | 2007-06-29 | 2008-05-28 | 山西鸿基实业有限公司 | Tool for measuring front upper top-roller and front roller parallelism |
| CN101390700A (en) * | 2008-10-16 | 2009-03-25 | 东华大学 | Device with culture relics exhibiting and protecting function |
| CN101672729A (en) * | 2009-10-14 | 2010-03-17 | 清华大学 | High-altitude and low-pressure characteristic simulation test station of air compressor in internal-combustion engine |
| CN202768653U (en) * | 2012-05-11 | 2013-03-06 | 万向钱潮股份有限公司 | Automatic assembling device for needle roller bearing |
| CN203069372U (en) * | 2013-02-07 | 2013-07-17 | 四川奥特附件维修有限责任公司 | Valve testing device in vacuum environment |
-
2013
- 2013-11-15 CN CN201310577667.3A patent/CN103592115B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094922A (en) * | 1998-09-09 | 2000-08-01 | Ziegler; Alex R. | Vacuum-insulated refrigerant line for allowing a vaccum chamber system with water-vapor cryocoil compressor to be locatable outside cleanroom |
| JP2004183038A (en) * | 2002-12-03 | 2004-07-02 | National Institute For Materials Science | METHOD FOR FORMING ELECTRODE WITH LOW CONTACT RESISTANCE ONTO n-TYPE CONDUCTIVE ZINC OXIDE |
| CN101078579A (en) * | 2006-05-25 | 2007-11-28 | 河南统一电器制造有限公司 | Cold or heat insulation box |
| CN101187551A (en) * | 2007-06-29 | 2008-05-28 | 山西鸿基实业有限公司 | Tool for measuring front upper top-roller and front roller parallelism |
| CN101390700A (en) * | 2008-10-16 | 2009-03-25 | 东华大学 | Device with culture relics exhibiting and protecting function |
| CN101672729A (en) * | 2009-10-14 | 2010-03-17 | 清华大学 | High-altitude and low-pressure characteristic simulation test station of air compressor in internal-combustion engine |
| CN202768653U (en) * | 2012-05-11 | 2013-03-06 | 万向钱潮股份有限公司 | Automatic assembling device for needle roller bearing |
| CN203069372U (en) * | 2013-02-07 | 2013-07-17 | 四川奥特附件维修有限责任公司 | Valve testing device in vacuum environment |
Non-Patent Citations (1)
| Title |
|---|
| 曹鹏等: "《某型发动机高空活门研制》", 《中国军转民》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595476A (en) * | 2020-11-27 | 2021-04-02 | 中国航发四川燃气涡轮研究院 | Method and device for measuring rigidity of vacuum diaphragm capsule assembly of aero-engine |
| CN112595476B (en) * | 2020-11-27 | 2022-06-28 | 中国航发四川燃气涡轮研究院 | Method and device for measuring rigidity of vacuum diaphragm capsule assembly of aero-engine |
| CN114136631A (en) * | 2021-10-20 | 2022-03-04 | 中国航发四川燃气涡轮研究院 | Aeroengine vacuum diaphragm capsule subassembly high temperature mechanical properties measuring equipment |
| CN114136631B (en) * | 2021-10-20 | 2023-06-13 | 中国航发四川燃气涡轮研究院 | High-temperature mechanical property measuring equipment for aeroengine vacuum bellows assembly |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: AECC SHENYANG LIMING AERO-ENGINE Co.,Ltd. Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Aecc Shenyang Liming Aero Engine Co., Ltd. |
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