CN113758694B - Micro-pressure inspection device and method for aero-engine accessories - Google Patents
Micro-pressure inspection device and method for aero-engine accessories Download PDFInfo
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- CN113758694B CN113758694B CN202110963977.3A CN202110963977A CN113758694B CN 113758694 B CN113758694 B CN 113758694B CN 202110963977 A CN202110963977 A CN 202110963977A CN 113758694 B CN113758694 B CN 113758694B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- 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
- G01M15/02—Details or accessories of testing apparatus
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- 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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The invention provides a micro-pressure inspection device and a micro-pressure inspection method for an aeroengine accessory, wherein the device comprises a sealing clamp, an air pipe, a film pressure gauge, a three-way joint, a manual one-way pressure regulating valve and a latex ball; three ends of the three-way joint are respectively connected with the emulsion ball, the film pressure gauge and the aero-engine accessory to be subjected to micro-pressure inspection in a sealing way through an air pipe, wherein the air pipe is in sealing connection with the measuring end of the aero-engine accessory to be subjected to micro-pressure inspection through a sealing clamp; the rough adjustment of the pressure value can be realized within the range of 0-0.59 Kpa by manually controlling the compression amount of the emulsion ball, the air pressure can be reduced by a manual one-way pressure regulating valve, and the accurate adjustment of the pressure value is realized until the pressure input to the measuring end of the aeroengine accessory to be subjected to micro-pressure inspection reaches the specified requirement. The invention realizes the accurate adjustment of the micro-pressure level in the range of 0-1 kPa, and can easily realize the inspection adjustment of accessories with micro-pressure requirements of the aero-engine.
Description
Technical Field
The invention relates to a portable mechanical automatic device and an inspection and adjustment method, in particular to a micro-pressure inspection device and an inspection method in a range of 1 kilopascal of an aircraft engine accessory.
Background
The pressure regulating device is widely applied, and the range ranges from megapascals to kilopascals. The megapascal pressure regulating device has a plurality of optional numbers, and the most common gas cylinder pressure regulator is used for regulating from tens of megapascals to several megapascals; however, the kilopascal-level pressure regulating device is few, and only 10 kilopascals and less than 1 kilopascal are available in China at present. The minimum possible 0.5 kilopascals of import air-vent valve, but still do not satisfy the operational requirement that aeroengine annex (icing annunciator) was inspected, and the volume is great moreover, needs external air supply, has the risk that the trouble out of control caused the damage to the annex of atmospheric pressure regulation.
When an aeroengine is tested, performance inspection is required to be carried out on the icing annunciator of the engine accessory under a static condition, and due to the limitation of the conditions, a domestic aircraft maintenance manufacturer always carries out simulated inspection on the icing annunciator by a mouth blowing method. Because the pressure of mouth blowing is greatly changed due to personal difference of operators, the generated pressure can be from 1 kilopascal to tens of kilopascals, the pressure is not easy to be constant, the generated pressure cannot be measured, and the generated pressure is easy to exceed the specified checking pressure (0.59 kilopascal), so that the quality risk that the checking pressure is over-pressure and the accessories are damaged is generated. At present, a portable micro-pressure air source device with convenient pressure regulation, safety and reliability below 1 kilopascal and an inspection and adjustment method are urgently needed.
Disclosure of Invention
In order to solve the problems, the invention provides a reliable micro-pressure checking device and an adjusting method for an aircraft engine icing annunciator, which can realize quantitative checking of the engine accessory icing annunciator under static conditions, and the pressure can be arbitrarily constant within the range of 0.59 kilopascal, and the setting can be accurately adjusted. Meanwhile, the device adopting the method has small volume, convenient use and movement and stable and reliable air source.
The technical scheme of the invention is as follows:
the micro-pressure checking device for the aircraft engine accessory comprises a sealing clamp, an air pipe, a film pressure gauge, a three-way joint, a manual one-way pressure regulating valve and a latex ball;
three ends of the three-way joint are respectively connected with the emulsion ball, the film pressure gauge and the aero-engine accessory to be subjected to micro-pressure inspection in a sealing way through an air pipe, wherein the air pipe is in sealing connection with the measuring end of the aero-engine accessory to be subjected to micro-pressure inspection through a sealing clamp;
by pinching the emulsion ball, air can be input into the measuring end of the aeroengine accessory to be checked by micro pressure, so that the pressure of the film type pressure gauge is slowly increased; the manual one-way pressure regulating valve can release air pressure, so that the pressure of the film type pressure gauge is slowly reduced;
the rough adjustment of the pressure value can be realized within the range of 0-0.59 Kpa by manually controlling the compression amount of the emulsion ball, the air pressure can be reduced by a manual one-way pressure regulating valve, and the accurate adjustment of the pressure value is realized until the pressure input to the measuring end of the aeroengine accessory to be subjected to micro-pressure inspection reaches the specified requirement.
The specific inspection method comprises the following steps:
the first step: and testing the tightness of the micro-pressure checking device.
The air outlet of the sealing clamp is plugged by a thumb, the latex ball is lightly pinched, and the pressure is controlled to be about 1 kPa. The film pressure gauge was observed and there should be no leakage change in pressure within 10 seconds.
And secondly, sleeving the outlet end of the micro-pressure checking device on a calibration sensor of the icing annunciator through a sealing clamp, slowly pinching the latex ball, and lightly blowing air to the rubber hose. The compression amount of the emulsion ball is controlled to be about 1/4, the rough adjustment of the pressure value is realized by adopting a method of 'small compression amount and multiple pressurization', the accurate adjustment of the pressure value is realized by combining a manual unidirectional pressure regulating valve, the blowing pressure is controlled to be between 0.34 and 0.59kPa, a control signal is output by an icing annunciator, and whether the actions of an 'icing signal lamp of an air inlet guide' and a warmer meet the standard requirements is checked;
thirdly, releasing the pressure in the micro-pressure checking device by using a manual one-way pressure regulating valve, and returning the film type pressure gauge to zero; the icing annunciator output is disconnected, and whether the signal lamp disconnection of the air inlet guide icing and the delay action of the warmer meet the standard requirements is checked;
fourth, repeating the second and third steps to check again.
Fifthly, releasing the pressure in the micro-pressure checking device by using the manual one-way pressure regulating valve again, removing the sealing clamp, and resetting the equipment.
Advantageous effects
The micro-pressure checking device and the adjusting method for the accessories of the aero-engine successfully realize the accurate adjustment of the micro-pressure level in the range of 0-1 kPa, can easily realize the checking and adjustment of the accessories with micro-pressure requirements of the aero-engine, and currently, 200 times of engine accessories are checked cumulatively. The inspection device is simple and reliable in operation, convenient and light in movement, easy to control the detected air pressure value, and visual and accurate in pressure value display.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1: a micro-pressure checking device structure schematic diagram;
wherein: 1. an icing annunciator; 2. sealing the clamp; 3. a rubber hose; 4. a thin film pressure gauge; 5. a three-way joint; 6. manual one-way pressure regulating valve; 7. latex balls.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The description is only intended to illustrate the invention and not to limit it.
When an aeroengine is tested, performance inspection is required to be carried out on an aeroengine icing signal device under a static condition, and the working condition of relevant accessories of the aeroengine under high-altitude extreme meteorological conditions is simulated and inspected. And the inspection requirements are: when the blowing pressure on the icing annunciator calibration sensor is controlled to be between 0.34KPa and 0.59KPa, the icing annunciator outputs a control signal, wherein an 'air inlet guide icing' signal lamp and warmer action logic meet the following standards:
1. air inlet guide icing signal lamp on time: after the icing control signal is acquired, the device is switched on after 3 seconds of delay; after the icing control signal disappears, the delay is closed for 11 seconds;
2. icing annunciator warmer on time: switching on after acquiring the icing control signal; after the icing control signal has disappeared, the delay is closed for 11 seconds.
In order to realize the above inspection process, the embodiment provides a micro-pressure inspection and adjustment device for an aeroengine accessory, which consists of a sealing clamp 2, a rubber hose 3, a film pressure gauge 4, a three-way joint 5, a manual one-way pressure regulating valve 6, a latex ball 7 and the like. In this embodiment, the film pressure gauge 4 is a bellows pressure gauge: y-100, measuring range 0-2.5 kilopascals, precision 2.5 grade; three-way joint: a diameter of 6 mm, stainless steel; rubber hose, latex ball, manual unidirectional pressure regulating valve: the inner diameter is 6 mm.
The latex ball 7, the film type pressure gauge 4, the sealing clamp 2 and the inlet of the accessory 1 are connected by the tee joint 5 and the rubber hose 3, and the pressure value of the inlet end of the accessory 1 is the same as the pressure value of the film type pressure gauge 4 by utilizing the principle of a communicating vessel, so that the measurement and the monitoring of the pressure value are realized. The air source outlet end is connected with the measuring end of the inspection accessory 1 through the sealing clamp 2, and the slowly pinching latex ball 7 inputs air into the measuring end of the accessory 1, so that the pressure of the film type pressure gauge 4 slowly rises. The pressure is gradually reduced by the manual one-way pressure regulating valve 6, and the pressure of the film type pressure gauge 4 is slowly reduced. The manual control of the compression amount of the emulsion ball 7 can realize rough pressure regulation within the range of 0-0.59 Kpa, and the manual unidirectional pressure regulating valve 6 reduces the air pressure to realize accurate pressure value regulation until the outlet pressure reaches the specified range.
The specific use method for performance inspection is as follows:
when in use, the compression amount of the latex ball is manually controlled, 1/4, 1/2, 3/4 and the like of the compressed latex ball are used for obtaining different air inflow amounts, the air supply pressure of (0-1) kPa is realized, and the air inflow amount is coarsely adjusted. According to specific requirements, the system pressure value is realized by using a method of 'small compression amount and multiple pressurization' and does not exceed the specified pressure range. If a more accurate pressure value is needed, the manual unidirectional pressure regulating valve is used for realizing the fine regulation of the pressure until the system pressure reaches the specification of the technical standard.
The specific inspection method comprises the following steps:
the first step: and testing the tightness of the micro-pressure checking device.
The air outlet of the sealing clamp is plugged by a thumb, the latex ball is lightly pinched, and the pressure is controlled within 1 kPa. The film pressure gauge was observed and there should be no leakage change in pressure within 10 seconds.
And secondly, sleeving the outlet end of the micro-pressure checking device on a calibration sensor of the icing annunciator through a sealing clamp, slowly pinching the latex ball, and lightly blowing air to the rubber hose. Controlling the compression amount of the emulsion ball to be about 1/4, controlling the blowing pressure to be between 0.34 and 0.59kPa by adopting a method of ' small compression amount and multiple pressurization ', enabling an icing annunciator to output a control signal, and checking whether the actions of an ' icing signal lamp of an air inlet guide and a warmer meet the standard requirements;
thirdly, releasing the pressure in the micro-pressure checking device by using a manual one-way pressure regulating valve, and returning the film type pressure gauge to zero; the icing annunciator output is disconnected, and whether the signal lamp disconnection of the air inlet guide icing and the delay action of the warmer meet the standard requirements is checked;
fourth, repeating the second and third steps to check again.
Fifthly, releasing the pressure in the micro-pressure checking device by using the manual one-way pressure regulating valve again, removing the sealing clamp, and resetting the equipment.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (2)
1. A micro-pressure inspection method for an aircraft engine icing annunciator is characterized by comprising the following steps of: the method comprises the following steps:
step 1: testing the tightness of the micro-pressure checking device;
the micro-pressure checking device comprises a sealing clamp, an air pipe, a film pressure gauge, a three-way joint, a manual one-way pressure regulating valve and a latex ball; the air pipe adopts a rubber hose; the thin film type pressure gauge adopts a Y-100 bellows pressure gauge, the measuring range is 0-2.5 kilopascals, and the precision is 2.5 grade; the three-way joint has an drift diameter of 6 mm and is made of stainless steel; the inner diameter of the rubber hose, the latex ball and the manual one-way pressure regulating valve is 6 mm; three ends of the three-way joint are respectively connected with the latex ball, the film pressure gauge and the aero-engine icing signal device to be subjected to micro-pressure inspection in a sealing manner through air pipes, wherein the air pipes are in sealing connection with the measuring end of the aero-engine icing signal device to be subjected to micro-pressure inspection through a sealing clamp; by pinching the emulsion ball, air can be input into the measuring end of the aeroengine icing annunciator to be checked by micro pressure, so that the pressure of the film type pressure gauge is slowly increased; the manual one-way pressure regulating valve can release air pressure, so that the pressure of the film type pressure gauge is slowly reduced; the coarse adjustment of the pressure value can be realized within the range of 0-0.59 Kpa by manually controlling the compression amount of the emulsion ball, the air pressure can be reduced by a manual one-way pressure regulating valve, and the accurate adjustment of the pressure value is realized until the pressure input to the measuring end of the aeroengine icing signal device to be subjected to micro-pressure inspection reaches the specified requirement;
the air outlet of the sealing clamp is plugged by a thumb, and the latex ball is gently pinched to control the pressure within 1 kPa; observing the film type pressure indicating value, and checking the tightness if the pressure is not changed in a leakage way within 10 seconds;
step 2: sleeving the outlet end of the micro-pressure checking device on a calibration sensor of the icing annunciator through a sealing clamp, slowly pinching the latex ball, and lightly blowing air to the air pipe; the compression amount of the latex ball is controlled, coarse adjustment of the pressure value is realized by adopting a mode of small compression amount and repeated pressurization, accurate adjustment of the pressure value is realized by combining a manual one-way pressure regulating valve, the blowing pressure is controlled to be between 0.34kPa and 0.59kPa, a control signal is output by an icing signal device, and whether the actions of an icing signal lamp and a warmer of an air inlet guide device meet the standard requirements is checked;
step 3: releasing the pressure in the micro-pressure checking device by using a manual one-way pressure regulating valve, and returning the film type pressure gauge to zero; the icing annunciator output is disconnected, and whether the signal lamp disconnection of the air inlet guide icing and the delay action of the warmer meet the standard requirements is checked;
step 4: repeating the step 2 and the step 3 for work, and checking and confirming again;
step 5: and releasing the pressure in the micro-pressure checking device by using the manual one-way pressure regulating valve, removing the sealing clamp, and resetting the equipment.
2. The method according to claim 1, wherein: the logical standards of the air inlet guide icing signal lamp and the warmer action are as follows:
air inlet guide icing signal lamp on time: after the icing control signal is acquired, the device is switched on after 3 seconds of delay; after the icing control signal disappears, the delay is closed for 11 seconds;
icing annunciator warmer on time: switching on after acquiring the icing control signal; after the icing control signal has disappeared, the delay is closed for 11 seconds.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110963977.3A CN113758694B (en) | 2021-08-21 | 2021-08-21 | Micro-pressure inspection device and method for aero-engine accessories |
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| CN202110963977.3A CN113758694B (en) | 2021-08-21 | 2021-08-21 | Micro-pressure inspection device and method for aero-engine accessories |
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| CN113758694A CN113758694A (en) | 2021-12-07 |
| CN113758694B true CN113758694B (en) | 2023-10-20 |
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2021
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| US6318155B1 (en) * | 1997-07-25 | 2001-11-20 | Bruce Carr | Pressure testing apparatus |
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| CN113758694A (en) | 2021-12-07 |
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