CN107340101A - A kind of sealing device gas tiny leakage evaluating apparatus and method - Google Patents
A kind of sealing device gas tiny leakage evaluating apparatus and method Download PDFInfo
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- CN107340101A CN107340101A CN201710531104.9A CN201710531104A CN107340101A CN 107340101 A CN107340101 A CN 107340101A CN 201710531104 A CN201710531104 A CN 201710531104A CN 107340101 A CN107340101 A CN 107340101A
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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
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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
- G01M3/025—Details with respect to the testing of engines or engine parts
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Abstract
A kind of sealing device gas tiny leakage evaluating apparatus disclosed by the invention and method, belong to sealing device leak-testing field.The inventive system comprises cavity, sealing device, vaccum-pumping equipment, vacuum meter, vacuum display device and computer.Cavity is connected with sealing device by jointing, and cavity is connected with vacuum meter by jointing, and cavity is connected with vaccum-pumping equipment by jointing.Vacuum meter and vacuum display device pass through cable connection by cable connection, vacuum display device and computer.There is stop valve on jointing.Vaccum-pumping equipment and computer pass through cable connection.Computer is provided with vacuum monitor and analysis software and vacuumizes control software.A kind of sealing device gas tiny leakage evaluation method realized based on gas tiny leakage evaluating apparatus is also disclosed.The present invention provides a kind of device and method for the test of sealing device sealing property, evaluation, has the advantages of measuring accuracy height, high sensitivity, adjustable sensitivity, can be to tiny leakage situation quantitative result.
Description
Technical field
The present invention relates to a kind of sealing device gas tiny leakage evaluating apparatus and method, is applied to boat more particularly, to one kind
The sealing device gas tiny leakage evaluating apparatus and method of empty engine, belong to sealing device leak-testing and evaluation method neck
Domain.
Background technology
In aerial engine sealing technical research, sealing device development and production, all refer to sealing property evaluation ask
The hermetic properties of sealing device (such as face seals, circumferential seals) will particularly be detected and tested by topic.
Carry out the detection of sealing device hermetic properties and experiment work, prior art mainly evaluates sealing using the method for number bubble
Can, number of bubbles thinks that product hermeticity can the qualified (aeroplane engine of such as certain model no more than the number of agreement at the appointed time
Secret seal apparatus requirement bubbles number in 5 minutes is less than 10).Device corresponding to this detection and test method includes：Standard
Origin, standard gas cylinders, standard null air filter, standard switch, master gauge 1, master gauge 2, inlet end seal cavity, sealing
Device, outlet side seal cavity, connecting tube, beaker, are shown in Fig. 1.
To there is measuring accuracy in the method for number bubble and corresponding device not high enough when evaluating sealing device leakage situation
The problem of, Air Bubble Size is different at different conditions for such as different sealing device or same apparatus, and bubble number, which is only capable of providing, determines
Property leak condition evaluation, be unable to provide accurately leakage numerical quantity.
With the progress of aero engine technology, development and production and its test technology investigation to sealing device propose more
High requirement.In aerial engine sealing field, in terms of the technical research of sealing property is improved and develop and produce micro- let out
Demand in terms of leakage sealing device increasingly displays.These demands objectively require to study tiny leakage amount, high precision measurement side
Method and device, and adopting said method and device are evaluated the performance of sealing device.
The content of the invention
A kind of sealing device gas tiny leakage evaluating apparatus disclosed by the invention and method technical problems to be solved are to carry
It is used for aerial engine sealing device sealing property testing equipment and method for one kind, there is measuring accuracy height, high sensitivity, spirit
The advantages of sensitivity is adjustable, and can be to tiny leakage situation quantitative result.
The purpose of the present invention is achieved through the following technical solutions.
A kind of sealing device gas tiny leakage evaluating apparatus disclosed by the invention includes cavity, sealing device, vacuumizes and set
Standby, vacuum meter, vacuum display device and computer.Described cavity is connected with sealing device by jointing, described cavity and
Vacuum meter is connected by jointing, and described cavity is connected with vaccum-pumping equipment by jointing.Described vacuum meter and
Vacuum display device passes through cable connection by cable connection, described vacuum display device and computer.Have on described jointing
Stop valve.Described vaccum-pumping equipment and computer passes through cable connection.Described computer is provided with vacuum monitor and analysis is soft
Part and vacuumize control software.
Described vacuum monitor and analysis software has following two functions：(1) it is bent to make vacuum-time relationship
Line, store vacuum and the data file of corresponding time；Feature calculation and extraction are carried out for vacuum-time graph,
Feature calculation and extraction include curve matching function, tangent slope, secant slope, curl trapezoidal area computing function, and with
The characteristic parameter is investigated and the sealing property of evaluation sealing device.(2) in seclected time section released gas rate (mole/
Second) computing function.
The described control software that vacuumizes has following function：Order is sent by vacuumizing control software, control vacuumizes
Equipment discharges the air in cavity outside chamber by jointing.
A kind of sealing device gas realized based on a kind of sealing device gas tiny leakage evaluating apparatus disclosed by the invention
Tiny leakage evaluation method, during work, open the stop valve on jointing, open installed on computer vacuumizes control software,
The air in cavity is discharged outside chamber by jointing by vacuumizing control software control vaccum-pumping equipment.Work as vacuum display device
When display vacuum is preset pressure value, the stop valve on closing jointing, it is ensured that gas will not be flowed into reversely.Containment portion
Air only by the end face seal face and circumferential sealing face of sealing device by leaking into cavity, so as to cause the change of vacuum
Change, using the method for vacuum come the sealing property testing and evaluate sealing device, described end face seal face and circumferential sealing
Face is to leak air inlet.Run computer sealing device evaluation vacuum monitor and analysis software, record vacuum and when
Between relation curve and corresponding data.The length of testing time requires to determine according to aerial engine sealing device experiment.With true
The relation curve of reciprocal of duty cycle and time extraction characteristic parameter are tested and evaluated to aerial engine sealing device sealing characteristics.
Described vacuum display device shows that vacuum preset pressure value is preferably 0.008Pa.
The described method using vacuum is come the sealing property tested and evaluate sealing device, and concrete methods of realizing is such as
Under：The leakage rate of random time section in preset time is calculated according to vacuum and the relation curve of time.Described vacuum
Degree and the relation curve of time obtain according to test data through over-fitting, i.e. vacuum P and time t relational expression is P=f
(t) inside cavity gas temperature T and time t relation is T=Ф during, being tested according to test data through over-fitting
(t).T is obtained accordingly1In to the t periods letting out in cavity 1 is leaked into by sealing device end face seal face and circumferential sealing face
Leak rate (unit is represented with mole/second) is such as formula 1) shown in.
Formula 1) in
By formula 2) and 3) substitute into formula 1), obtain formula 4)
According to formula 4) binding tests data obtain the slip of sealing device.
The leakage rate of random time section in preset time is calculated in described foundation vacuum and the relation curve of time,
Quantitative leakage rate data are provided for the development of aerial engine sealing device, and then evaluates plan and is installed on aerial engine sealing
The leaking performance of device is good and bad, and the selection for installing for different manufacturers and different batches of product engine is provided and quantitatively joined
Examine.
Under conditions of temperature keeps constant, because existing sealing leak method is able to observe that bubble in water receptacle,
For ease of contrast, the corresponding existing sealing leak evaluation method of setting leaks the volume of a bubble, according to the volume of different cavitys
Vacuum result table is calculated in the volume that a bubble is leaked with existing sealing leak method.The volume of different cavitys, equal
Under the conditions of corresponding existing one bubble volume of sealing leak evaluation method, vacuum changing value is different, and volume is bigger, and vacuum becomes
Change smaller；Otherwise volume is smaller, vacuum change is bigger.Appropriate cavity is selected to hold for different aerial engine sealing devices
Product can realize that the sensitivity of leakage test is adjustable, adjust out appropriate sensitivity and provide high-precision leakage test knot
Fruit.
Beneficial effect：
1st, a kind of sealing device gas tiny leakage evaluating apparatus disclosed by the invention, have simple in construction, it is easy to accomplish
Advantage.
2nd, compared with the sealing leak evaluation method of existing several bubbles, a kind of sealing device gas disclosed by the invention is micro- to be let out
Evaluating apparatus and method are leaked, the vacuum-time curve obtained based on test is capable of the quality of quantitative assessment sealing device,
In addition, appropriate cavity volume is selected to realize that the sensitivity of leakage test can for different aerial engine sealing devices
Adjust, there is the advantages of measuring accuracy height, high sensitivity, adjustable sensitivity, and can be to tiny leakage situation quantitative result.
3rd, a kind of sealing device gas tiny leakage evaluating apparatus disclosed by the invention and method, can be to aeroplane engine secret
Seal apparatus tiny leakage situation quantitative result, development, test, evaluation to aerial engine sealing device will have positive branch
Support acts on, and also aero-engine accessory (sealing device) installation can be given to provide effective a performance comparision means and method,
It is good and bad that the leaking performance for intending being installed on aerial engine sealing device is evaluated with this device and method, and is different manufacturers
The selection that engine is installed with different batches of product provides qualitative reference.
Brief description of the drawings
Fig. 1 is the existing leak testing method of sealing device and corresponding device in background technology；
Fig. 2 is a kind of sealing device gas tiny leakage evaluating apparatus schematic diagram disclosed by the invention.
Embodiment
In order to which objects and advantages of the present invention are better described, the content of the invention is done further with example below in conjunction with the accompanying drawings
Explanation.
Embodiment 1：
As shown in Fig. 2 a kind of sealing device gas tiny leakage evaluating apparatus disclosed in the present embodiment includes cavity 1, sealing
Device 2, vaccum-pumping equipment 5, vacuum meter 7, vacuum display device 9 and computer 14.Vacuum meter 7, vacuum display device 9 are just magnificent using Chengdu
The microcomputer type digital display compound vacuum gauge of Electron equipment Co., Ltd's production, numbering ZDF-X-LED.Described cavity 1 and sealing
Device 2 is connected by jointing 8, and described cavity 1 and vacuum meter 7 are connected by jointing 6, described cavity 1 and is taken out
Vacuum equipment 5 is connected by jointing 3.Described vacuum meter 7 and vacuum display device 9 is connected by cable 10, and described is true
Empty display 9 and computer 14 are connected by cable 11.There is stop valve on described jointing 3.The described He of vaccum-pumping equipment 5
Computer 14 is connected by cable 12.Described computer 14 is provided with vacuum monitor and analysis software and vacuumizes control software.
Described vacuum monitor and analysis software has following two functions：(1) it is bent to make vacuum-time relationship
Line, store vacuum and the data file of corresponding time；Feature calculation and extraction are carried out for vacuum-time graph,
Feature calculation and extraction include curve matching function, tangent slope, secant slope, curl trapezoidal area computing function, and with
The characteristic parameter is investigated and the sealing property of evaluation sealing device.(2) in seclected time section released gas rate (mole/
Second) computing function.
The described control software that vacuumizes has following function：Order is sent by vacuumizing control software, control vacuumizes
Equipment 5 discharges the air in cavity 1 outside chamber by jointing 3.
A kind of sealing device gas realized based on a kind of sealing device gas tiny leakage evaluating apparatus disclosed by the invention
Tiny leakage evaluation method, during work, open the stop valve on jointing 3, open installed on computer 14 to vacuumize control soft
Part, the air in cavity 1 is discharged outside chamber by jointing 3 by vacuumizing control software control vaccum-pumping equipment 5.Work as vacuum
When the display vacuum of display 9 is 0.008Pa, the stop valve on closing jointing 3, it is ensured that gas will not be flowed into reversely.Chamber
The extraneous air of body 1 only by the end face seal face and circumferential sealing face of sealing device 2 by leaking into cavity 1, it is true so as to cause
The change of reciprocal of duty cycle, using the method for vacuum come the sealing property testing and evaluate sealing device, described circumferential sealing face and
End face seal face is to leak air inlet 4.Run the sealing device evaluation vacuum monitor and analysis software of computer 14, record
Vacuum and the relation curve and corresponding data of time.The length of testing time is according to the requirement of aerial engine sealing device experiment
It is determined that.Aerial engine sealing device sealing characteristics are tested with the relation curve of vacuum and time extraction characteristic parameter
And evaluation.
Such as intend that certain type aero-engine face seals is tested and evaluated, this face seals is passed through into spy
The frock of system is installed on the opening position of sealing device 2 of apparatus of the present invention, is sent by the control software that vacuumizes installed on computer 14
Order, control vaccum-pumping equipment 5 discharge the air in cavity 1 outside chamber by jointing 3.Treat that vacuum display device 9 is shown very
When reciprocal of duty cycle is 0.008Pa, the stop valve on closing jointing 3, it is ensured that gas will not be flowed into reversely.Run the vacuum of computer 14
Test and analysis software, vacuum-time relation data being preserved, the sampling time set, sample frequency was 10 seconds as 10 minutes,
Show vacuum-time curve on vacuum monitor and analysis software, vacuum can corresponding to 5 minutes on curve
The sealing property of the type aero-engine face seals is reflected, vacuum indicating value is big to represent the close of the sealing device product
Envelope property is poor, otherwise the sealing of the small expression sealing device product of vacuum indicating value is excellent.
The described method using vacuum is come the sealing property tested and evaluate sealing device, and concrete methods of realizing is such as
Under：The leakage rate of random time section in 10 minutes is calculated according to vacuum and the relation curve of time, is aero-engine
The development of sealing device provides quantitative leakage rate data.Vacuum-time graph in the cavity 1 that setting test obtains, it is
Obtained according to test data through over-fitting, i.e. vacuum P and time t relational expression is P=f (t), is passed through according to test data
Inside cavity gas temperature T and time t relation is T=Ф (t) during fitting is tested.T can be obtained accordingly1To t
(unit is with mole/second for the period interior slip leaked into by sealing device end face seal face and circumferential sealing face in cavity 1
Represent) such as formula 1) shown in.
Formula 1) in
By formula 2) and 3) substitute into formula 1), obtain formula 4)
According to formula 4) binding tests data obtain the slip of sealing device.
Under conditions of temperature keeps constant, because existing sealing leak detection method is observed that gas in water receptacle
Bubble, for ease of contrast, set one bubble of corresponding existing method leakage (it is assumed that bubble diameter 4mm, pressure is 1 atmospheric pressure)
Volume, for the volume of different cavitys 1, it is as shown in table 1 below that vacuum result is calculated.
Table 1 leaks a bubble cavity vacuum change
The result of table 1 shows：Different cavity volumes, corresponding to existing one bubble volume bar of sealing leak detection method
Under part, its vacuum changing value is different, and volume is bigger, and vacuum change is smaller；Otherwise volume is smaller, vacuum change is bigger.
Therefore the sensitivity of the present embodiment method and device leakage test is adjustable, can be selected for different aerial engine sealing devices
Appropriate cavity volume is selected, appropriate sensitivity is provided and provides high-precision leakage test result.
As table 1 it can also be seen that a kind of sealing device gas tiny leakage evaluating apparatus disclosed in using the present embodiment and commenting
Valency method, under conditions of corresponding existing detection method only has a bubble leakage volume, even if larger in the volume of cavity 1
(21205750.412mm3) in the case of, its sensitivity is also higher, reaches 0.1596Pa.
Above-described specific descriptions, the purpose, technical scheme and beneficial effect of invention are carried out further specifically
It is bright, it should be understood that the specific embodiment that the foregoing is only the present invention, the protection model being not intended to limit the present invention
Enclose, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., should be included in the present invention
Protection domain within.
Claims (7)
- A kind of 1. sealing device gas tiny leakage evaluating apparatus, it is characterised in that：Including cavity (1), sealing device (2), take out very Null device (5), vacuum meter (7), vacuum display device (9) and computer (14)；Described cavity (1) and sealing device (2) passes through company Joint (8) is connected, and described cavity (1) and vacuum meter (7) are connected by jointing (6), described cavity (1) and is taken out very Null device (5) is connected by jointing (3)；Described vacuum meter (7) and vacuum display device (9) is connected by cable (10), Described vacuum display device (9) and computer (14) is connected by cable (11)；There is stop valve on described jointing (3)；Institute The vaccum-pumping equipment (5) and computer (14) stated are connected by cable (12)；Described computer (14) be provided with vacuum monitor and Analysis software and vacuumize control software.
- A kind of 2. sealing device gas tiny leakage evaluating apparatus as claimed in claim 1, it is characterised in that：Described vacuum Test and analysis software have following two functions：(1) make vacuum-time curve, store vacuum and correspondingly The data file of time；Feature calculation and extraction are carried out for vacuum-time graph, feature calculation and extraction include song Line is fitted function, tangent slope, secant slope, curl trapezoidal area computing function, and is investigated and evaluated with the characteristic parameter The sealing property of sealing device；(2) in seclected time section released gas rate (mole/second) computing function；The described control software that vacuumizes has following function：Order is sent by vacuumizing control software, controls vaccum-pumping equipment (5) air in cavity (1) is discharged outside chamber by jointing (3).
- A kind of 3. sealing device realized based on a kind of sealing device gas tiny leakage evaluating apparatus described in claim 1 or 2 Gas tiny leakage evaluation method, it is characterised in that：During work, the stop valve on jointing (3) is opened, is opened on computer (14) Installation vacuumizes control software, by vacuumizing control software control vaccum-pumping equipment (5) by the air in cavity (1) by connecting Outside joint (3) discharge chamber；When it is preset pressure value that vacuum display device (9), which shows vacuum, close on jointing (3) Stop valve, it is ensured that gas will not be flowed into reversely；End face seal face and circumference of cavity (1) extraneous air only by sealing device (2) Sealing surface is by leaking into cavity (1), close to test and evaluate using the method for vacuum so as to cause the change of vacuum The sealing property of seal apparatus, described circumferential sealing face and end face seal face are to leak air inlet (4)；Run computer (14) Sealing device evaluation vacuum monitor and analysis software, record vacuum and the relation curve and corresponding data of time；Test The length of time requires to determine according to aerial engine sealing device experiment；Feature is extracted with the relation curve of vacuum and time Parameter is tested and evaluated to aerial engine sealing device sealing characteristics.
- A kind of 4. sealing device gas tiny leakage evaluation method as claimed in claim 3, it is characterised in that：Described vacuum shows Show that device (9) shows that vacuum is that preset pressure value elects 0.008Pa as.
- A kind of 5. sealing device gas tiny leakage evaluation method as described in claim 3 or 4, it is characterised in that：Described adopts With the method for vacuum come the sealing property tested and evaluate sealing device, concrete methods of realizing is as follows,The leakage rate of arbitrary time span section in preset time is calculated according to vacuum and the relation curve of time；Described The relation curve of vacuum and time obtain according to test data through over-fitting, i.e. the relational expression of vacuum P and time t are P=f (t), inside cavity gas temperature T and time t relation is T=during being tested according to test data through over-fitting Ф(t)；T is obtained accordingly1Leaked into the t periods by sealing device end face seal face and circumferential sealing face in cavity (1) Slip (unit is represented with mole/second) such as formula 1) shown in；<mrow> <mi>X</mi> <mi>L</mi> <mo>=</mo> <mfrac> <mrow> <mo>(</mo> <msub> <mi>n</mi> <mi>t</mi> </msub> <mo>-</mo> <msub> <mi>n</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <mi>t</mi> <mo>-</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow>Formula 1) in<mrow> <msub> <mi>n</mi> <mi>t</mi> </msub> <mo>=</mo> <mfrac> <mrow> <msub> <mi>P</mi> <mi>t</mi> </msub> <msub> <mi>V</mi> <mn>1</mn> </msub> </mrow> <mrow> <mi>R</mi> <mi>T</mi> </mrow> </mfrac> <mo>=</mo> <mfrac> <mrow> <mi>f</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <msub> <mi>V</mi> <mn>1</mn> </msub> </mrow> <mrow> <mi>R</mi> <mi>&Phi;</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mn>2</mn> <mo>)</mo> </mrow><mrow> <msub> <mi>n</mi> <mn>1</mn> </msub> <mo>=</mo> <mfrac> <mrow> <msub> <mi>P</mi> <mn>1</mn> </msub> <msub> <mi>V</mi> <mn>1</mn> </msub> </mrow> <mrow> <msub> <mi>RT</mi> <mn>1</mn> </msub> </mrow> </mfrac> <mo>=</mo> <mfrac> <mrow> <mi>f</mi> <mrow> <mo>(</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> <msub> <mi>V</mi> <mn>1</mn> </msub> </mrow> <mrow> <mi>R</mi> <mi>&Phi;</mi> <mrow> <mo>(</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mn>3</mn> <mo>)</mo> </mrow>By formula 2) and 3) substitute into formula 1), obtain formula 4)<mrow> <mi>X</mi> <mi>L</mi> <mo>=</mo> <mfrac> <mrow> <mo>(</mo> <msub> <mi>n</mi> <mi>t</mi> </msub> <mo>-</mo> <msub> <mi>n</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <mi>t</mi> <mo>-</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mfrac> <mo>=</mo> <mfrac> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>f</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <msub> <mi>V</mi> <mn>1</mn> </msub> </mrow> <mrow> <mi>R</mi> <mi>&Phi;</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>-</mo> <mfrac> <mrow> <mi>f</mi> <mrow> <mo>(</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> <msub> <mi>V</mi> <mn>1</mn> </msub> </mrow> <mrow> <mi>R</mi> <mi>&Phi;</mi> <mrow> <mo>(</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <mi>t</mi> <mo>-</mo> <msub> <mi>t</mi> <mn>1</mn> </msub> <mo>)</mo> </mrow> </mfrac> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mn>4</mn> <mo>)</mo> </mrow>According to formula 4) binding tests data obtain the slip of sealing device.
- A kind of 6. sealing device gas tiny leakage evaluation method as claimed in claim 5, it is characterised in that：Described foundation is true The leakage rate of random time section in preset time is calculated in the relation curve of reciprocal of duty cycle and time, is aerial engine sealing device Development quantitative leakage rate data are provided, and then it is good and bad to evaluate the leaking performance for intending being installed on aerial engine sealing device, And the selection that engine is installed for different manufacturers and different batches of product provides qualitative reference.
- A kind of 7. sealing device gas tiny leakage evaluation method as claimed in claim 5, it is characterised in that：Kept not in temperature Under conditions of change, because existing sealing leak detection method is able to observe that bubble in water receptacle, for ease of contrast, setting pair Existing sealing leak evaluation method is answered to leak the volume of a bubble, according to the volume of different cavitys (1) and existing sealing leak Vacuum result table is calculated in the volume that method leaks a bubble；The volume of different cavitys (1), is corresponding to existing sealing Under the conditions of leaking one bubble volume of evaluation method, vacuum changing value is different, and volume is bigger, and vacuum change is smaller；It is on the contrary Volume is smaller, and vacuum change is bigger；Appropriate cavity volume is selected to realize for different aerial engine sealing devices The sensitivity of leakage test is adjustable, adjusts out appropriate sensitivity and provides high-precision leakage test result.
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| CN108827553A (en) * | 2018-06-25 | 2018-11-16 | 安庆市晶科电子有限公司 | A kind of transistor leakage test equipment |
| CN109029867A (en) * | 2018-07-06 | 2018-12-18 | 西安西热节能技术有限公司 | A kind of determination method of vacuum equipment suction capactity |
| CN109855790A (en) * | 2017-11-30 | 2019-06-07 | 浙江绍兴苏泊尔生活电器有限公司 | Vacuum detecting method, apparatus and cooking apparatus |
| CN109900442A (en) * | 2017-12-07 | 2019-06-18 | 曼胡默尔滤清器（上海）有限公司 | A kind of air-distributor vacuum actuator leakage test device and test method |
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| CN112289469A (en) * | 2020-11-03 | 2021-01-29 | 浙江伦特机电有限公司 | Leakage testing device |
| CN113252245A (en) * | 2021-06-02 | 2021-08-13 | 蜂巢能源科技有限公司 | Moisture resistance test method and moisture resistance test system for sealing member of battery pack |
| CN113984275A (en) * | 2021-12-24 | 2022-01-28 | 北京凯世通半导体有限公司 | Method for monitoring ultralow temperature ion implantation equipment by measuring vacuum degree |
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| CN108827553A (en) * | 2018-06-25 | 2018-11-16 | 安庆市晶科电子有限公司 | A kind of transistor leakage test equipment |
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| CN110131582A (en) * | 2019-05-30 | 2019-08-16 | 北京亿华通科技股份有限公司 | A kind of hydrogen storage cylinder degradation detecting method of fuel cell hydrogen system |
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| CN113252245A (en) * | 2021-06-02 | 2021-08-13 | 蜂巢能源科技有限公司 | Moisture resistance test method and moisture resistance test system for sealing member of battery pack |
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| CN113984275B (en) * | 2021-12-24 | 2022-05-10 | 北京凯世通半导体有限公司 | Method for monitoring ultralow temperature ion implantation equipment by measuring vacuum degree |
| EP4206637A1 (en) * | 2021-12-27 | 2023-07-05 | Pratt & Whitney Canada Corp. | Vacuum testing a seal within a gas turbine engine structure |
| US11719120B2 (en) | 2021-12-27 | 2023-08-08 | Pratt & Whitney Canada Corp. | Vacuum testing a seal within a gas turbine engine structure |
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