CN215414248U - Rubber material sealing performance testing device - Google Patents
Rubber material sealing performance testing device Download PDFInfo
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- CN215414248U CN215414248U CN202121960737.XU CN202121960737U CN215414248U CN 215414248 U CN215414248 U CN 215414248U CN 202121960737 U CN202121960737 U CN 202121960737U CN 215414248 U CN215414248 U CN 215414248U
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Abstract
The utility model discloses a device for testing the sealing performance of a rubber material, which comprises a first shell and a second shell, wherein the first shell is connected with the second shell through a positioning mechanism, and the device is characterized in that: the top of the first shell is fixedly connected with a first exhaust pipe, an upper butt joint part and a lower butt joint part which are mutually butted are formed between the first shell and the second shell, and a sealing gasket is arranged between the upper butt joint part and the lower butt joint part. Compared with a large-scale sealing test platform, the utility model has the characteristics of low processing difficulty, high cost performance and convenience in operation, and realizes the quantitative test of the sealing performance of the sealing material.
Description
Technical Field
The utility model belongs to the technical field of inspection devices, and particularly relates to a device for testing the sealing performance of a rubber material.
Background
The sealing performance of the vacuum equipment is an important index of the vacuum equipment, and the correct design of various sealing structures and the proper selection of sealing materials are one of the keys for determining the quality of the vacuum equipment. Mechanical vacuum equipment is generally sealed by sealing rubber, and the leakage rate of the mechanical vacuum equipment is required to be limited within an allowable range. The rubber material is a high-molecular polymer and has super-elasticity characteristic, so that the rubber material can deform greatly under the action of extrusion force. In addition, for the rubber sealing material with the surface coated with the fiber fabric, although the rubber friction coefficient can be reduced, the abrasion can be reduced, and the rubber can be prevented from blocking metal, the contact and friction problems between the sealing element and the contacted surface are further complicated. Since the contact interface is difficult to observe and measure by itself due to its inaccessibility and concealment, it is a very complicated task to determine the sealing performance of the rubber material.
At present, the common methods for characterizing the sealing performance of the sealing material in the industry are common physical properties, air permeability and other properties, and the physical properties such as constant compression set, tensile strength and the like and the air permeability are tested under limited pressure and temperature, so that different working states such as temperature, pressure, compression ratio and the like cannot be intuitively simulated, and the sealing performance of the sealing material used in special equipment is further characterized.
In summary, the problems of the prior art are as follows: the sealing performance of the rubber material is tested under limited conditions, and different working states cannot be visually observed.
The significance of solving the technical problems is as follows: the utility model aims to design a set of sealing performance testing device capable of controlling working environments such as temperature, pressure, compression ratio and the like. The device adjusts the compression ratio of the rubber material by setting the thickness of the adjusting gasket, finally tests the leakage rate of the rubber material and represents the sealing performance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art and provides a device for testing the sealing performance of a rubber material.
The technical scheme adopted by the utility model for solving the problem is as follows:
the utility model provides a rubber material sealing performance testing arrangement, includes first casing and second casing, first casing passes through positioning mechanism and connects the second casing, the first exhaust tube of top fixedly connected with of first casing, first casing with be formed with last butt joint portion, the lower butt joint portion of mutual butt joint between the second casing, go up the butt joint portion with be equipped with seal ring down between the butt joint portion.
Preferably, the upper docking portion includes a first docking area and a second docking area, a sealing groove is formed between the first docking area and the second docking area, and the sealing gasket is fitted in the sealing groove.
Further preferably, an adjusting shim is further arranged between the second butt joint region and the lower butt joint portion, and the number of the adjusting shims is one or more.
Preferably, positioning mechanism includes stud and nut, second casing, seal ring and first casing are passed in proper order to stud's one end, stud's other end threaded connection has the nut.
Preferably, the air pump further comprises a third shell provided with a second exhaust pipe, the third shell is located below the second shell, and the third shell is in threaded connection with the first shell through a positioning bolt.
Further preferably, the second exhaust pipe is fixedly connected to a side wall of the third casing.
Preferably, the first suction pipe is welded at the center of the top of the first casing.
Further preferably, the adjusting shim is arc-shaped.
Preferably, the sealing washer is made of fluororubber.
The beneficial effects of the utility model are as follows:
1) controlling the pressure: a vacuum pump is connected into the first pumping hole of the utility model for vacuum pumping treatment, so that the pressure environment of the sealing material is controlled;
2) controlling the temperature: placing the assembled experimental device into a forced air drying oven with fixed test temperature for testing to realize temperature control;
3) controlling the compression ratio: the device controls the compression amount of the sealing material, realizes thickness adjustment by increasing or decreasing the number of adjusting gaskets, and is used for controlling the compression ratio of the sealing material.
Compared with a large-scale sealing test platform, the device has the characteristics of low processing difficulty, high cost performance and convenience in operation, and can simultaneously realize the control of the test process on pressure, temperature and compression amount. The dynamic sealing performance of the sealing rubber is fitted under different pressures, temperatures and compression ratios in the working state of the sealing material, so that the quantitative test of the sealing performance of the sealing material is realized.
Drawings
The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus do not limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a plan view of the present invention;
FIG. 2 is an enlarged schematic view of the portion A of FIG. 1;
FIG. 3 is a cross-sectional view of the gasket of the present invention prior to compression;
fig. 4 is a cross-sectional view of the gasket of the present invention after compression.
In the figure:
1-a first housing; 2-a first extraction pipe; 3-a second housing; 4-adjusting the spacer; 5-positioning the bolt; 601-a stud; 602-a nut; 7-a sealing gasket; 8-a third shell; 9-a second extraction pipe; 10-a first docking area; 11-a second docking area; 12-seal groove.
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be specifically described below by way of example, but all the descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the utility model that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the term "connected" may refer to a direct connection, an indirect connection through an intermediate, a connection between two elements or an interaction relationship between two elements, and unless otherwise specifically defined, the term should be understood as having a specific meaning in the present application by those skilled in the art.
Example 1:
the utility model provides a rubber material sealing performance testing arrangement, includes first casing 1 and second casing 3, first casing 1 passes through positioning mechanism and connects second casing 3, the first exhaust tube 2 of first casing 1's top fixedly connected with, first casing 1 with be formed with last butt joint portion, the lower butt joint portion of mutual butt joint between the second casing 3, go up the butt joint portion with be equipped with seal ring 7 down between the butt joint portion.
The working principle is as follows:
the first shell 1 is in butt joint with the second shell 3, a cavity is formed between the two shells, an upper butt joint part and a lower butt joint part are formed at non-cavity positions on two sides of the shells and are connected through a positioning mechanism, and the two shells are sealed. The first exhaust pipe 2 is located at the top of the first casing 1 and used for vacuum-exhausting air in the cavity to further seal the cavity. And then, the tightness of the two shells is measured by the positioning mechanism, and the leakage rate of the rubber material is tested by matching with a vacuum pump, so that the sealing performance is represented.
The working process is as follows:
in this embodiment, 1 sample of the sealing gasket 7 to be tested is placed between the upper butt joint portion and the lower butt joint portion at the two ends of the housing, and the sealing gasket is O-shaped. The two ends of the shell are respectively provided with 1 positioning mechanism, after the first shell 1 and the second shell 3 are fastened and sealed, the first exhaust pipe 2 is connected with a vacuum pump, and the vacuum pump is started to evacuate. Standing for 5 minutes after evacuation, testing whether helium leaks from the sealing surface of the butt joint part of the first shell 1 and the second shell 3 by using a helium leak detector, circularly testing after 5 minutes, and repeating twice. This procedure allows the leak rate of the sealing gasket 7 to be tested.
In this embodiment, the first pumping tube 2 is made of aluminum alloy, the first casing 1 and the second casing 3 are made of 6a02 aluminum alloy, the interface is welded in a multi-layer manner, and the surface is polished.
Further, it is also considered in this embodiment that the upper docking portion includes a first docking area 10 and a second docking area 11, a sealing groove 12 is formed between the first docking area 10 and the second docking area 11, and the sealing gasket 7 is fitted in the sealing groove 12. The height of the sealing groove 12 is smaller than the height of the sealing washer 7, otherwise the sealing washer 7 cannot be tested. The sealing groove 12 has the function of preventing the sealing washer 7 from slipping, so that the rubber sealing material test is better carried out.
In this embodiment, only the sealing groove 12 is formed in the upper abutting portion, which is a preferred embodiment of the present invention. In addition, it is also conceivable to form a seal groove 12 in the lower abutting portion and fix the seal gasket 7 further by opposing the seal groove 12 in the upper abutting portion. Alternatively, the seal groove 12 is not provided in the upper abutting portion, and the seal groove 12 is formed only in the lower abutting portion. The above examples all finally achieve the function of fixing the sealing gasket 7.
Furthermore, it is also considered in this embodiment that an adjusting shim 4 is further disposed between the second docking area 11 and the lower docking portion, and the number of the adjusting shims 4 is one or more. The compression ratio of the seal rubber ring can be accurately controlled by adjusting the thickness by adding or subtracting the spacer 4.
In this embodiment, the thickness that sets up seal ring 7 that will test is 10mm, and the sealing performance of seal ring 7 when needing test compression ratio to be 40%, and the thickness of adjustment gasket 4 is 1mm, chooses for use 6 adjustment gaskets 4 to place on the lower butt joint portion at second casing 3 both ends, then screws up positioning mechanism, when the hindrance that receives adjustment gasket 4 is screwed up motionlessly, realizes that the seal ring compression ratio is 40% state promptly. In a further consideration, the height of the sealing groove 12 is also calculated, and the compression ratio of the sealing material is further accurately calculated according to the following formula:
in the formula:
According to the formula, the compression ratio is calculated, and the number of the required adjusting gaskets 4 or other values are reversely calculated.
Further, it can be considered in this embodiment that the positioning mechanism includes a stud 601 and a nut 602, one end of the stud 601 sequentially passes through the second housing 3, the sealing washer 7 and the first housing 1, and the other end of the stud 601 is connected with the nut 602 by a thread. Stud 601 cooperates with nut 602 to secure the seal, assembly is quick, and parts are easily replaced.
Further, it can be considered in this embodiment that the air conditioner further includes a third casing 8 provided with a second air exhaust pipe 9, the third casing 8 is located below the second casing 3, and is connected to the first casing 1 through the positioning bolt 5 by screw threads.
The third housing 8 is used for supporting the device and is matched with the first housing 1 to seal the second housing 3, and a pair of positioning bolts 5 are arranged at the left side and the right side of the third housing 8. When the first exhaust pipe 2 exhausts and the vacuum degree is not easy to rise, another vacuum pump is selected to be connected with the second exhaust pipe 9 for synchronous evacuation, and the vacuum degree can be improved. Standing for 5 minutes after the evacuation is finished, testing whether helium leaks from the sealing surface of the butt joint part of the first shell 1 and the second shell 3 by using a helium leak detector, circularly testing after an interval of 5 minutes, and repeating twice to finish the test of the leakage rate of the sealing washer 7.
Further preferably, the second exhaust pipe 9 is fixedly connected to a side wall of the third housing 8. The second exhaust tube 9 is welded on the side wall of the third shell 8, does not influence the support and stability of the device, and is convenient to place on a plane.
Further, it is also contemplated in the present embodiment that the first suction pipe 2 is welded at the center of the top of the first casing 1. The fixation of the first extraction duct 2 in the centre of the top allows to keep the whole sealing device balanced and stable, also faster and more uniform evacuation of the gas in the cavity between the first casing 1 and the second casing 3.
Further, it is also contemplated in this embodiment that the adjustment pad 4 is arc-shaped. The arc shape may be more compatible with the shape of the stud 601 for better sealing.
Further, it is also considered in this embodiment that the sealing gasket 7 is made of a fluororubber material. The sealing washer 7 is made of fluororubber, so that micromolecule impurities are not easy to precipitate under the vacuum condition.
In conclusion, the utility model provides the device for testing the sealing performance of the rubber material, which can control the working environments such as temperature, pressure, compression ratio and the like.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (9)
1. The utility model provides a rubber materials sealing performance testing arrangement, includes first casing and second casing, first casing passes through positioning mechanism and connects the second casing, its characterized in that: the top of the first shell is fixedly connected with a first exhaust pipe, an upper butt joint part and a lower butt joint part which are mutually butted are formed between the first shell and the second shell, and a sealing gasket is arranged between the upper butt joint part and the lower butt joint part.
2. The device for testing the sealing performance of the rubber material according to claim 1, wherein: the upper docking part includes a first docking area and a second docking area, a sealing groove is formed between the first docking area and the second docking area, and the sealing gasket is fitted in the sealing groove.
3. The device for testing the sealing performance of the rubber material according to claim 2, wherein: and adjusting gaskets are arranged between the second butt joint area and the lower butt joint part, and the number of the adjusting gaskets is one or more.
4. The device for testing the sealing performance of the rubber material according to claim 1, wherein:
positioning mechanism includes stud and nut, second casing, seal ring and first casing are passed in proper order to stud's one end, stud's other end threaded connection has the nut.
5. The device for testing the sealing performance of the rubber material according to claim 1, wherein: the air pump further comprises a third shell provided with a second exhaust pipe, wherein the third shell is located below the second shell and is in threaded connection with the first shell through a positioning bolt.
6. The device for testing the sealing performance of the rubber material according to claim 5, wherein: the second exhaust tube is fixedly connected to the side wall of the third shell.
7. The device for testing the sealing performance of the rubber material according to claim 1, wherein: the first exhaust pipe is welded at the center of the top of the first shell.
8. The device for testing the sealing performance of the rubber material according to claim 3, wherein: the adjusting shim is arc-shaped.
9. The device for testing the sealing performance of the rubber material according to claim 1, wherein: the sealing washer is made of fluororubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121960737.XU CN215414248U (en) | 2021-08-20 | 2021-08-20 | Rubber material sealing performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121960737.XU CN215414248U (en) | 2021-08-20 | 2021-08-20 | Rubber material sealing performance testing device |
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| Publication Number | Publication Date |
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| CN215414248U true CN215414248U (en) | 2022-01-04 |
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| CN202121960737.XU Active CN215414248U (en) | 2021-08-20 | 2021-08-20 | Rubber material sealing performance testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2622498A (en) * | 2023-09-01 | 2024-03-20 | Sinomach Sensing Tech Co Ltd | Leak detection apparatus and method for weld of corrugated diaphragm of pressure sensor |
-
2021
- 2021-08-20 CN CN202121960737.XU patent/CN215414248U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2622498A (en) * | 2023-09-01 | 2024-03-20 | Sinomach Sensing Tech Co Ltd | Leak detection apparatus and method for weld of corrugated diaphragm of pressure sensor |
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