Heat-conducting gasket oil leakage detection device

Abstract

The utility model provides a heat-conducting gasket oil leakage detection device which comprises an upper clamp and a lower clamp, and a connecting piece penetrates through the interiors of the upper clamp and the lower clamp and is used for driving the upper clamp and the lower clamp to be attached to each other; wherein the upper clamp and the lower clamp are internally provided with thickness limiting steel sheets, the upper end and the lower end of each thickness limiting steel sheet are each provided with a piece of glass fabric, and the positions, located at the corresponding positions of the upper clamp and the lower clamp, of the two pieces of glass fabric are each provided with a piece of filter paper. Silicone oil oozing from the heat-conducting gasket main body under the compression rate can pass through the glass fabric and is absorbed by the qualitative filter paper, so that the situation that the weight loss rate result is influenced after the heat-conducting gasket main body is broken and powder falls off due to direct contact between the heat-conducting gasket main body and the filter paper, and an oil seepage rate test error is caused can be avoided; and the heat-conducting gasket main body is arranged in the limiting groove and is limited through the thickness-limiting steel sheet.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal conductive pad detection, in particular to a thermal conductive pad oil leakage detection device. Background Art

[0002] Thermal pads are used to fill the air gap between heat-generating components and heat sinks or metal bases. Their flexible and elastic characteristics enable them to be used to cover very uneven surfaces. Heat is conducted from separate components or the entire PCB to the metal housing or diffusion plate, thereby improving the efficiency and service life of heat-generating electronic components.

[0003] In actual use of thermal gaskets, pressure and temperature are mutually constrained. With the increase of temperature, after the equipment has been running for a period of time, the gasket material will soften, creep, and stress relax, and the mechanical strength will also decrease. The sealing pressure will decrease, and there will be a certain compression rate. Compression will cause oil leakage in the thermal gasket. Excessive oil leakage will cause short circuits and open circuits in electronic equipment, affect optical transmission, and contaminate the lens. Therefore, it is very important to simulate the actual use scenario through a certain device and measure the oil leakage rate of the thermal gasket under a certain compression rate to screen thermal gaskets with qualified oil leakage for the long-term stable use of electronic products. Utility Model Content

[0004] In order to overcome the existing problems, the embodiment of the present application provides a thermal gasket oil leakage detection device, which is provided with an upper clamp and a lower clamp. The upper clamp and the lower clamp are connected by a connecting piece. During the rotation of the connecting piece, the upper clamp and the lower clamp can be ensured to fit each other, squeezing the internal thermal gasket body. The silicone oil seeping out of the thermal gasket body under the compression rate will pass through the glass fiber cloth and be absorbed by the qualitative filter paper. The direct contact between the thermal gasket body and the filter paper can be avoided, resulting in the thermal gasket body breaking and powdering, which affects the weight loss rate result and causes errors in the oil leakage rate test. In addition, a limiting groove is opened inside the thickness-limited steel sheet, and the thermal gasket body is placed inside the limiting groove, and the thermal gasket body is limited by the thickness-limited steel sheet.

[0005] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0006] A thermal pad oil leakage detection device comprises an upper clamp and a lower clamp, wherein the upper clamp and the lower clamp are provided with connecting pieces inside, and are used to drive the upper clamp and the lower clamp to fit each other;

[0007] Among them, a thickness-limiting steel sheet is provided inside the upper clamp and the lower clamp, and a glass fiber cloth is provided at the upper and lower ends of the thickness-limiting steel sheet. A filter paper is provided at the corresponding positions of the two glass fiber cloths, respectively, and the upper clamp and the lower clamp are connected by a connecting piece. Then, the filter paper is taken out and placed on the upper surface of the lower clamp, and then the glass fiber cloth is taken out and placed on top of the filter paper. The thickness-limiting steel sheet is taken out and placed inside the glass fiber cloth, and the glass fiber cloth and the filter paper are placed on top of the thickness-limiting steel sheet in sequence. During the rotation of the connecting piece, it can be ensured that the upper clamp and the lower clamp are in contact with each other to squeeze the internal thermal gasket body. The silicone oil seeping out of the thermal gasket body under the compression rate will pass through the glass fiber cloth and be absorbed by the qualitative filter paper, which can avoid direct contact between the thermal gasket body and the filter paper, resulting in the thermal gasket body being broken and powdering, which affects the weight loss rate result and causes errors in the oil permeability test.

[0008] Preferably, a limiting groove is provided inside the thickness-limiting steel sheet;

[0009] Among them, a thermal conductive gasket body is placed inside the limiting groove, the cross-sectional diameter of the limiting groove is smaller than the cross-sectional diameter of the thickness limiting steel sheet, and the size of the thermal conductive gasket body is smaller than the size of the limiting groove. The thermal conductive gasket body is placed inside the limiting groove, and then the thickness limiting steel sheet is placed inside the two fiberglass cloths and on the upper surface of the lower clamp.

[0010] Preferably, the intersections of the upper clamp and the lower clamp with the connecting piece are provided with through holes, and the connecting piece passes through the through holes. The connecting piece is located on the lower surface of the lower clamp and is provided with a nut. When the upper clamp and the lower clamp need to be fitted together, the connecting piece is rotated. The connecting piece rotates with the nut during the rotation, and the connecting piece drives the upper clamp to move toward the side of the lower clamp through the limiting of the nut.

[0011] The advantages of the embodiments of the present application are:

[0012] An upper clamp and a lower clamp are provided, and the upper clamp and the lower clamp are connected by a connecting piece. During the rotation of the connecting piece, the upper clamp and the lower clamp can be ensured to fit each other, squeezing the internal thermal gasket body. The silicone oil seeping out of the thermal gasket body under the compression rate will pass through the glass fiber cloth and be absorbed by the qualitative filter paper, thereby avoiding direct contact between the thermal gasket body and the filter paper, resulting in the thermal gasket body breaking and powdering, which affects the weight loss rate result and causes an error in the oil permeability test. In addition, a limiting groove is opened inside the thickness-limiting steel sheet, and the thermal gasket body is placed inside the limiting groove, and the thermal gasket body is limited by the thickness-limiting steel sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1This is a schematic diagram of the overall structure of the thermal conductive gasket oil leakage detection device of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of the connection between the lower clamp and the thermal pad body in the thermal pad oil leakage detection device of the utility model;

[0016] Figure 3 This is a schematic diagram of the front view structure of the thermal conductive gasket oil leakage detection device of the utility model before operation;

[0017] Figure 4 This is a schematic diagram of the front view structure of the thermal conductive gasket oil leakage detection device of the utility model after operation;

[0018] Figure 5 The utility model is a schematic diagram of the overall structure of the thickness-limited steel sheet in the thermal conductive gasket oil leakage detection device.

[0019] Description of main reference numerals:

[0020] 1. Upper clamp; 2. Lower clamp; 3. Connector; 4. Filter paper; 5. Fiberglass cloth; 6. Thickness-limiting steel sheet; 7. Thermal pad body; 8. Limiting groove. DETAILED DESCRIPTION

[0021] The embodiment of the present application solves the problems in the prior art by providing a thermal gasket oil leakage detection device, wherein an upper clamp and a lower clamp are provided, and the upper clamp and the lower clamp are connected by a connecting piece. During the rotation of the connecting piece, the upper clamp and the lower clamp can be ensured to fit each other, thereby squeezing the internal thermal gasket body. The silicone oil seeping out of the thermal gasket body under the compression rate will pass through the glass fiber cloth and be absorbed by the qualitative filter paper, thereby preventing the thermal gasket body from directly contacting the filter paper, thereby preventing the thermal gasket body from breaking and powdering, thereby affecting the weight loss rate result and causing an error in the oil leakage rate test. In addition, a limiting groove is provided inside the thickness-limiting steel sheet, and the thermal gasket body is placed inside the limiting groove, and the thermal gasket body is limited by the thickness-limiting steel sheet.

[0022] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows:

[0023] Example

[0024] This embodiment provides a specific structure of a thermal pad oil leakage detection device, such as Figure 1-5 As shown, it includes an upper clamp 1 and a lower clamp 2, and a connecting member 3 runs through the upper clamp 1 and the lower clamp 2 to drive the upper clamp 1 and the lower clamp 2 to fit each other;

[0025] Among them, a thickness-limiting steel sheet 6 is provided inside the upper clamp 1 and the lower clamp 2, and a glass fiber cloth 5 is provided at the upper and lower ends of the thickness-limiting steel sheet 6. The two glass fiber cloths 5 are respectively located at the corresponding positions of the upper clamp 1 and the lower clamp 2, and a filter paper 4 is provided. The upper clamp 1 is connected to the lower clamp 2 by a connecting piece 3, and then the filter paper 4 is taken out and placed on the upper surface of the lower clamp 2, and then the glass fiber cloth 5 is taken out and placed on the filter paper 4, and the thickness-limiting steel sheet 6 is taken out and placed inside the glass fiber cloth 5, and the glass fiber cloth 5 and the filter paper 4 are placed on the thickness-limiting steel sheet 6 in sequence. During the rotation of the connecting piece 3, it can be ensured that the upper clamp 1 and the lower clamp 2 are in contact with each other, and the internal thermal gasket body 7 is squeezed. The silicone oil seeping out of the thermal gasket body 7 under the compression rate will pass through the glass fiber cloth 5 and be absorbed by the qualitative filter paper 4, which can avoid the direct contact between the thermal gasket body 7 and the filter paper 4, resulting in the thermal gasket body 7 being broken and powdered, which affects the weight loss rate result and causes an error in the oil permeability test.

[0026] A limiting groove 8 is provided inside the thickness limiting steel sheet 6;

[0027] Among them, a thermal conductive gasket body 7 is placed inside the limiting groove 8, the cross-sectional diameter of the limiting groove 8 is smaller than the cross-sectional diameter of the thickness limiting steel sheet 6, and the size of the thermal conductive gasket body 7 is smaller than the size of the limiting groove 8. The thermal conductive gasket body 7 is placed inside the limiting groove 8, and then the thickness limiting steel sheet 6 is placed inside the two fiberglass cloths 5 and placed on the upper surface of the lower clamp 2.

[0028] The upper clamp 1 and the lower clamp 2 are both provided with through holes at the intersection with the connecting member 3, and the connecting member 3 passes through the through holes. The connecting member 3 is located on the lower surface of the lower clamp 2 and is provided with a nut. When the upper clamp 1 and the lower clamp 2 need to be fitted together, the connecting member 3 is rotated. The connecting member 3 rotates with the nut during the rotation process, and the connecting member 3 drives the upper clamp 1 to move toward the side of the lower clamp 2 through the limiting of the nut.

[0029] By adopting the above technical solution:

[0030] The upper clamp 1 and the lower clamp 2 are connected by the connecting piece 3, and then the filter paper 4 is taken out and placed on the upper surface of the lower clamp 2, and then the glass fiber cloth 5 is taken out and placed on the filter paper 4, and the thickness limiting steel sheet 6 is taken out and placed inside the glass fiber cloth 5, and the glass fiber cloth 5 and the filter paper 4 are placed on the thickness limiting steel sheet 6 in sequence. During the rotation of the connecting piece 3, it can be ensured that the upper clamp 1 and the lower clamp 2 are in contact with each other, and the internal thermal gasket body 7 is squeezed. The silicone oil seeping out of the thermal gasket body 7 under the compression rate will pass through the glass fiber cloth 5 and be absorbed by the qualitative filter paper 4, which can avoid direct contact between the thermal gasket body 7 and the filter paper 4, resulting in the thermal gasket body 7 breaking and falling into powder, affecting the weight loss rate result, and causing errors in the oil permeability test.

[0031] The inspection steps of the thermally conductive pad body 7 obtained according to the embodiment are as follows:

[0032] Step 1: Prepare three sets of circular specimens with a diameter of (30±3) mm, measure and record the initial mass W and initial thickness T1;

[0033] Step 2: Attach one layer of fiberglass cloth and three layers of filter paper to each group of samples, clamp them with fiberglass cloth (total weight W2) and filter paper, and then clamp them with a clamp by screw locking and thickness limiting. Select a thickness limiting steel sheet with a suitable thickness T2 to determine the sample compression rate.

[0034] Step 3: Put the fixture and the sample assembled in step 2 into a blast drying oven, set the temperature to 125°C, place it for (48±0.5) hours, take it out, place it at room temperature for 2-3 hours, carefully peel off the filter paper, weigh and record the weight W3 of the three groups of samples and glass fiber;

[0035] Step 4: Calculate the oil yield in mass units:

[0036] NCR=(W+W2-W3) / W×100%

[0037] Where, NCR——oil yield, %;

[0038] W——mass of sample before experiment, g;

[0039] W2——total mass of glass fiber cloth, g;

[0040] W3——Total mass of sample and glass fiber after test, g.

[0041] The result was taken as the average of the three measured values, retaining 3 significant figures.

[0042] The initial thickness of the thermal pad body 7 is T1, and a limited thickness steel sheet 6 with a thickness of T2 is selected. The thermal pad body 7 is placed in the limiting groove 8 inside the limited thickness steel sheet 6. It can be determined that the thickness value of the thermal pad body 7 after compression is also T1, so the compression rate is determined as:

[0043] (T1-T2) / T1*100%.

[0044] For example, if the initial thickness T1 of the heat-conducting gasket body 7 is 2.0 mm and the thickness T2 of the thickness-limiting steel sheet 6 is 1.0 mm, the compression rate can be determined as: (2.0-1.0) / 2.0*100%=50%.

[0045] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A thermal pad oil leakage detection device, characterized in that: It comprises an upper clamp (1) and a lower clamp (2), wherein a connecting piece (3) runs through the interior of the upper clamp (1) and the lower clamp (2) for driving the upper clamp (1) and the lower clamp (2) to fit together; Wherein, a thickness limiting steel sheet (6) is provided inside the upper clamp (1) and the lower clamp (2), a glass fiber cloth (5) is provided at the upper and lower ends of the thickness limiting steel sheet (6), and a filter paper (4) is provided at the corresponding positions of the two glass fiber cloths (5) respectively located on the upper clamp (1) and the lower clamp (2).

2. A thermally conductive gasket oil leakage detection device as claimed in claim 1, characterized in that: A limiting groove (8) is provided inside the thickness limiting steel sheet (6); Wherein, a heat-conducting gasket body (7) is placed inside the limiting groove (8).

3. A thermally conductive gasket oil leakage detection device as claimed in claim 1, characterized in that: The upper clamp (1) and the lower clamp (2) are both provided with through holes at the intersections with the connecting piece (3).

4. A thermally conductive gasket oil leakage detection device as claimed in claim 2, characterized in that: The cross-sectional diameter of the limiting groove (8) is smaller than the cross-sectional diameter of the thickness-limiting steel sheet (6), and the size of the thermally conductive gasket body (7) is smaller than the size of the limiting groove (8).

5. The thermally conductive gasket oil leakage detection device according to claim 1, characterized in that: The connecting piece (3) is located on the lower surface of the lower clamp (2) and is provided with a nut.

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