CN113358295A - Method and device for measuring air leakage quantity of vehicle door - Google Patents
Method and device for measuring air leakage quantity of vehicle door Download PDFInfo
- Publication number
- CN113358295A CN113358295A CN202110598486.3A CN202110598486A CN113358295A CN 113358295 A CN113358295 A CN 113358295A CN 202110598486 A CN202110598486 A CN 202110598486A CN 113358295 A CN113358295 A CN 113358295A
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- Prior art keywords
- vehicle door
- sealing
- door
- sealing film
- air leakage
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 130
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000002788 crimping Methods 0.000 claims abstract description 5
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 14
- 238000005259 measurement Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- -1 specifically Substances 0.000 description 1
Images
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
- G01M3/26—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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a method and a device for measuring the air leakage quantity of a vehicle door. The sealing film edge with the sealed adhesion of first sealing strip is airtight to the door, be provided with on the seal membrane the exhaust hole, the exhaust hole is used to prevent the seal membrane is at door switch fracture in the twinkling of an eye, the second sealing strip set up in the sealing film edge with first sealing strip crimping, and then make the sealed effect of seal membrane is better. After the same vehicle which is detected to be adhered with the sealing film and removed with the sealing film is filled with pressurized gas and is kept still, the data obtained by detection are compared to judge whether the vehicle door leaks air or not and the air leakage amount, so that the air leakage amount of each vehicle door can be detected conveniently.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a detection method and a related device capable of helping to detect the sealing performance of automobile quantity.
Background
Currently, one of the important directions for the research in the automobile industry is to improve comfort and reduce noise, which is inseparable from the sealing performance of the whole automobile. The good or bad sealing performance of the whole vehicle will affect the sound insulation, dust prevention, water prevention, air conditioning performance and the like of the vehicle. The air tightness test is an important method for evaluating the sealing performance of the whole vehicle, and the analysis of the leakage and contribution of the vehicle door in the air tightness test of the whole vehicle is very important.
In the past, when the contribution of the whole single vehicle door is analyzed, a one-by-one plugging method is adopted for testing, namely, a door handle, a water leakage hole, a glass mud groove periphery, an outer water cutter, a door hinge periphery, a vehicle door opening sealing strip periphery and the like on the vehicle door are plugged, and the total contribution of the single vehicle door is obtained by subtracting a test value after each leak point of the vehicle door is plugged from a test value before each leak point of the vehicle door is plugged. This kind of detection mode is wasted time and energy and the shutoff effect is not good can make the measurement inaccurate.
Disclosure of Invention
Therefore, a method and a device for measuring the air leakage amount of the car door are needed to be provided, the problems that in the prior art, the time and labor are wasted and the measurement result is inaccurate when a one-by-one blocking method is used for detecting the car door are solved, the method and the device with better sealing performance are used for measuring the air leakage amount of the car door, the measurement is convenient, the time is saved, and the measurement accuracy is improved.
In order to achieve the aim, the invention provides a method for measuring the air leakage quantity of a vehicle door, which comprises the following steps:
s1, connecting the edge of the sealing film with a first sealing strip around the door opening of the vehicle door in a sealing manner, and sealing the vehicle door to be measured or the door opening corresponding to the vehicle door to be measured through the sealing film;
s2, closing the vehicle door;
s3, detecting the air tightness of the vehicle body where the vehicle door is located;
and S4, after the sealing film is removed, continuing to close the vehicle door for air tightness detection, wherein the step S4 can be positioned before the step S1.
Further, the step S3 specifically includes:
s31, filling pressurized gas into the vehicle body, and standing for T;
s32, measuring the value A of the air pressure in the vehicle body;
the step S4 specifically includes:
s41, measuring the air pressure value B on the same vehicle door without the adhesive sealing film according to the methods of S31 and S32;
the method for measuring the air leakage quantity of the vehicle door further comprises the step S5:
and S5, comparing the value A with the value B, wherein the difference value of the value A and the value B is the air leakage of the vehicle door.
Further, the sealing film is provided with a vent hole, and the step S2 further includes:
and S21, opening the exhaust hole when the vehicle door is closed, and sealing the exhaust hole after the vehicle door is closed.
Further, the edge position of the sealing film adopted in the step S1 is provided with a second sealing strip, and the second sealing strip is overlapped and pressed with the first sealing strip.
Further, the step S1 further includes:
s11, checking whether the crimping of the first sealing strip and the second sealing strip is deviated or not;
and S12, if the deviation occurs, adjusting to enable the first sealing strip and the second sealing strip to be overlapped and pressed.
Further, the shape of the door opening sealing film adopted in the step S1 is fitted to the shape of the vehicle door in which the sealing film is in contact with or close to.
Further, still include the seal membrane, the edge and the first sealing strip sealing connection in door opening of door of seal membrane, through the door opening that the sealed door that awaits measuring or await measuring door correspond.
Furthermore, the sealing film is provided with an exhaust hole.
Further, the sealing membrane is attached to the shape of the vehicle door, which is in contact with or close to the sealing membrane.
Further, the edge position of the sealing film is provided with a second sealing strip, and the second sealing strip is overlapped and pressed with the first sealing strip.
The sealing structure is different from the prior art, the edge of the sealing film is bonded with the first sealing strip of the door opening of the vehicle door to seal the vehicle door, pressurized gas is filled into the vehicle door after the vehicle door is tightly closed, the pressure value is measured after the vehicle door is kept still, the pressurized gas with the same condition is filled into the vehicle after the same vehicle door without the bonding sealing film is closed, the pressure value is measured after the pressurized gas with the same condition is kept still for the same time, whether gas leakage exists or not is judged by comparing the difference between the two values, and the gas leakage of the vehicle door is conveniently and visually measured.
Drawings
FIG. 1 is a schematic view showing a positional relationship between a door and a seal film in an embodiment of the present invention;
FIG. 2 is a schematic view of a sealing film structure according to an embodiment of the present invention;
fig. 3 is a flowchart of a leak measurement method in an embodiment of the present application.
Description of reference numerals:
1. a vehicle door;
21. a first seal strip;
22. a second seal strip;
3. a sealing film;
4. and (4) exhausting holes.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "vertical" is not strictly vertical, but is within the tolerance of the error. "parallel" is not strictly parallel but within the tolerance of the error.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.
Referring to fig. 1 to 3, the present embodiment provides a method and a device for measuring a vehicle door air leakage amount, and in order to more conveniently detect the air leakage amount, the following operation method is provided for detection, and the specific steps may be:
s1, the edge of the sealing film 3 is connected with the first sealing strip 21 on the door opening of the vehicle door 1 in a sealing mode, namely the vehicle door 1 is sealed through the sealing film 3, and the vehicle door 1 to be measured or the door opening corresponding to the vehicle door 1 to be measured is sealed through the sealing film 3;
s2, closing the vehicle door 1 hermetically connected with the sealing film 3 to form a closed space in the vehicle where the vehicle door 1 is;
s3, carrying out air tightness detection on the vehicle body where the door 1 is located;
and S4, removing the sealing film 3, and then closing the vehicle door 1 for air tightness detection.
Specifically, the air tightness detection method may be a method of filling a pressurized gas, specifically, nitrogen or other inert gas, into the sealed vehicle body where the vehicle door 1 is located. And after the vehicle body is inflated, standing the vehicle body for a period of time, and measuring the air pressure value of the vehicle body. After the measurement is finished, the sealing film 3 connected to the vehicle door 1 is removed, the vehicle door 1 is continuously closed to seal the vehicle body, the sealing film 3 can be connected with the first sealing strip 21 in a sticking mode or the like, pressurized gas under the same conditions is filled in, and after the sealing film is kept still for the same time, the air pressure value in the vehicle where the vehicle door 1 is located is measured. And comparing two groups of air pressure values obtained by connecting the sealing film 3 with the air pressure values obtained by measuring after removing the sealing film 3, if a difference value appears or is larger than a preset value, the air leakage exists in the vehicle door 1, the difference value of the two groups of data is the relative air leakage, and in order to further improve the accuracy, the modes of measuring and comparing multiple groups of data for multiple times, then taking an average value and the like can be adopted. Meanwhile, the sequence of detecting the two groups of data can be changed, namely, the vehicle door 3 which is not adhered with the sealing film 3 is firstly detected, and then the upper sealing film 3 is adhered for continuous detection. Specifically, if the value detected after the vehicle door 1 adhered with the sealing film 3 is filled with the pressurized gas and left standing is 3000 pa, and the value detected after the vehicle door 1 not adhered with the sealing film 3 is filled with the pressurized gas and left standing is 1500 pa, it is determined that the vehicle door 1 leaks, and specifically, the value can be obtained by measuring in a manner of a gas pressure sensor or the like.
Furthermore, the sealing film 3 can be provided with an exhaust hole 4, because the sealing film 3 is adhered on the vehicle door 1, the sealing film 3 is easy to break due to the change of the pressure inside and outside the vehicle or the generated air flow in the process of opening and closing the vehicle door 1, and the exhaust hole 4 can be provided for the air flow generated instantly when the vehicle door 1 is opened and closed to prevent the sealing film 3 from breaking, namely the exhaust hole 4 is in an opening state to allow the air flow to pass through when the operation of opening or closing the vehicle door 1 is carried out, and the exhaust hole 4 is closed after the vehicle door 1 is closed so as to form a closed space in the vehicle. Therefore, in the case of operating with the sealing film 3 provided with the vent hole 4, the step S2 specifically includes: and S21, when the vehicle door 1 is closed, the exhaust hole 4 is opened, and the exhaust hole 4 is sealed after the vehicle door 1 is closed.
The first sealing strip 21 is arranged on the door opening of the vehicle door 1, the edge of the sealing film 3 is connected with the first sealing strip 21, the specific connection mode is not limited to adhesion, the sealing film 3 is used for sealing the vehicle door 1 to be measured or the door opening corresponding to the vehicle door 1 to be measured, therefore, the sealing film 3 can seal the door 1 or the door opening corresponding to the door 1, so that a sealed space is formed in the vehicle body where the door 1 is positioned better, but the bonding part of the sealing film 3 and the first sealing strip 21 can have the reasons of poor bonding and the like, air leakage may be caused to affect the sealing effect of the sealing film 3, so that a second sealing strip 22 may be provided at the edge of the sealing film 3, the second sealing strip 22 is overlapped and pressed with the first sealing strip 21, that is, the edge of the sealing film 3 is sandwiched between the first weather strip 21 and the second weather strip 22, and the sealing effect of the sealing film 3 on the vehicle body where the door 1 is located can be enhanced by the overlap-press bonding because the air leakage can be prevented more effectively. Therefore, in the measuring method provided with the second weather strip 22, the step S1 specifically includes:
s11, checking whether the crimping of the first sealing strip 21 and the second sealing strip 22 is deviated or not;
s12, if the displacement occurs, the displacement is adjusted so that the first weather strip 21 and the second weather strip 22 are overlapped and pressure-bonded.
Similarly, other means than the second weather strip 22 may be adopted, such as secondary adhesion of the sealing film 3 adhered to the door with adhesive to make the sealing performance higher, and the effect of enhancing the sealing effect may also be achieved.
Also in order to improve the sealing effect of the sealing film 3, the sealing film 3 can be arranged according to the shape of the door opening of the vehicle door 1 adhered with the sealing film 3 when being prepared, even if the used sealing film 3 is matched with the inner side shape of the door opening of the vehicle door 1 adhered with the sealing film, specifically, the sealing film 3 is matched with the shape and the size of the door opening, the inner side wall parts of the vehicle door 1 and the like, so that the inner side of the vehicle door 1 and the door opening can be better attached, and the sealing effect is better.
The material of the sealing film 3 can be a gas-tight flexible material, such as rubber, plastic, etc.
According to the technical scheme, the edge of the sealing membrane 3 is bonded with the first sealing strip 21 of the door opening of the vehicle door 1 to seal the vehicle door 1, the pressurized gas is filled into the vehicle door 1 after the vehicle door 1 is tightly closed, the air pressure value is measured after the pressurized gas under the same condition is filled into the vehicle after the vehicle door is closed, the air pressure value is measured after the pressurized gas under the same condition is kept for the same time, whether air leakage exists or not is judged by comparing the difference between the two values, meanwhile, the second sealing strip 22 matched with the first sealing strip 21 on the door opening in the edge crimping of the sealing membrane 3 can be used for increasing the sealing performance of the sealing membrane 3, the sealing membrane 3 is adhered more tightly, the exhaust hole 4 for preventing the sealing membrane 3 from cracking is additionally arranged, and the air leakage of the vehicle door 1 can be measured more intuitively through the method.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.
Claims (10)
1. A method for measuring the air leakage quantity of a vehicle door is characterized by comprising the following steps:
s1, connecting the edge of the sealing film with a first sealing strip around the door opening of the vehicle door in a sealing manner, and sealing the vehicle door to be measured or the door opening corresponding to the vehicle door to be measured through the sealing film;
s2, closing the vehicle door;
s3, detecting the air tightness of the vehicle body where the vehicle door is located;
and S4, after the sealing film is removed, continuing to close the vehicle door for air tightness detection.
2. The vehicle door air leakage amount measuring method according to claim 1, wherein the step S3 specifically includes:
s31, filling pressurized gas into the vehicle body, and standing for T;
s32, measuring the value A of the air pressure in the vehicle body;
the step S4 specifically includes:
s41, a value of air pressure B measured in the manner of S31 and S32 on the same said door without the adhesive seal film;
the method for measuring the air leakage quantity of the vehicle door further comprises the step S5:
and S5, comparing the value A with the value B, wherein the difference value between the data A and the value B is the air leakage of the vehicle door.
3. A vehicle door air leakage amount measuring method according to claim 1 or 2, wherein a vent hole is provided in the sealing film, and the step S2 further includes:
and S21, opening the exhaust hole when the vehicle door is closed, and sealing the exhaust hole after the vehicle door is closed.
4. A vehicle door air leakage amount measuring method according to any one of claims 1 and 2, wherein a second seal strip is provided at the edge position of the seal film used in the step S1, and the second seal strip is overlapped and pressed with the first seal strip.
5. The door air leakage amount measuring method according to claim 4, wherein the step S1 further includes:
s11, checking whether the crimping of the first sealing strip and the second sealing strip is deviated or not;
and S12, if the deviation occurs, adjusting to enable the first sealing strip and the second sealing strip to be overlapped and pressed.
6. A method for measuring a door leakage according to any one of claims 1 and 2, wherein the shape of the door opening sealing film used in the step S1 is fitted to the shape of the door in contact with or close to the sealing film.
7. A vehicle door air leakage amount measuring device is characterized by comprising: the edge of the sealing film is connected with the first sealing strip of the door opening of the vehicle door in a sealing mode, and the vehicle door to be measured or the door opening corresponding to the vehicle door to be measured is sealed through the sealing film.
8. A vehicle door air leakage amount measuring apparatus according to claim 7, wherein a vent hole is provided in the sealing film.
9. A vehicle door air leakage amount measuring apparatus according to claim 7, wherein the sealing film is fitted to the shape of the vehicle door in contact with or close to the sealing film.
10. A vehicle door air leakage amount measuring device according to claim 7, wherein a second seal strip is provided at an edge position of the seal film, and the second seal strip is overlapped and pressed with the first seal strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110598486.3A CN113358295A (en) | 2021-05-31 | 2021-05-31 | Method and device for measuring air leakage quantity of vehicle door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110598486.3A CN113358295A (en) | 2021-05-31 | 2021-05-31 | Method and device for measuring air leakage quantity of vehicle door |
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| Publication Number | Publication Date |
|---|---|
| CN113358295A true CN113358295A (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110598486.3A Pending CN113358295A (en) | 2021-05-31 | 2021-05-31 | Method and device for measuring air leakage quantity of vehicle door |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111337203A (en) * | 2020-04-15 | 2020-06-26 | 南京康尼机电股份有限公司 | Airtight and wind pressure capability test system of door |
| CN211504532U (en) * | 2020-04-09 | 2020-09-15 | 江苏省建筑工程质量检测中心有限公司 | Civil air defense door gas tightness on-site measuring device |
| CN111678657A (en) * | 2019-09-29 | 2020-09-18 | 山东省特种设备检验研究院有限公司 | Air leakage field detection method for civil air defense engineering protection equipment |
| CN212807496U (en) * | 2020-09-17 | 2021-03-26 | 上海铁大建设工程质量检测有限公司 | Fixing device for building exterior window field air tightness detection |
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2021
- 2021-05-31 CN CN202110598486.3A patent/CN113358295A/en active Pending
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| CN101349607A (en) * | 2008-08-05 | 2009-01-21 | 铁道部运输局 | Rail vehicle whole tightness test method and system |
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