Device for evaluating oil permeability of heat-conducting gel
By designing a device to evaluate the oil seepage performance of thermal conductive gel and using the size of the oil seepage circle to replace the mass percentage and digital presentation, the problems of insufficient accuracy and subjective influence of the existing method were solved, and accurate testing and intuitive reflection of the oil seepage performance were achieved.
Patent Information
- Application Number
- CN202422031839.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The existing evaluation method for the oil seepage performance of thermal conductive gel lacks accuracy, is greatly affected by the subjective factors of the operator, is difficult to present in data, and cannot accurately reflect the differences in oil seepage conditions.
A device for evaluating the oil seepage performance of thermal conductive gel was designed. The contact area between the thermal conductive gel and the test medium was fixed by a template, and the size of the oil seepage circle was used to replace the mass proportion. The intuitive feeling of the oil seepage circle was combined with the data presentation to simulate the test requirements of different scenarios.
It improves the accuracy of test results and the convenience of operation, can intuitively reflect the differences in oil leakage conditions, and adapts to the needs of various test scenarios.
Smart Images
Figure CN223362135U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thermal conductive gel, in particular to a device for evaluating the oil seepage performance of thermal conductive gel. Background Art
[0002] Thermal conductive gel is a high-performance thermal conductive material with excellent thermal conductivity, good filling properties, easy construction, long-term stability, electrical insulation and low stress. It is currently widely used in electronic equipment, new energy, communication equipment and industrial control.
[0003] However, due to the presence of a small amount of unreacted free oil within the thermal gel, oil leakage may occur during use. This oil leakage changes the composition and structure of the thermal gel, causing changes in physical properties such as hardness and viscosity. This may prevent it from fitting tightly to the heat source and heat dissipation components, affecting the stability of the heat dissipation effect. Furthermore, the leaked oil may flow onto surrounding electronic components, causing contamination and corrosion, affecting their normal operation and service life.
[0004] Therefore, it is crucial to accurately evaluate the oil permeability of thermal gels. Currently, commonly used testing methods include weighing, observation, and filter paper methods. Each of these methods has its own drawbacks and limitations. For example, the weighing method suffers from the tendency of thermal gels to adhere to containers, affecting the accuracy of test results. Furthermore, the amount of oil seepage is very small relative to the weight of the thermal gel itself, making it difficult to compare different products. The observation method's test results are subject to subjective operator input and cannot be presented numerically. The filter paper method's test results are significantly affected by the contact area and volume of the thermal gel. Utility Model Content
[0005] The purpose of the utility model is to provide a device for evaluating the oil seepage performance of thermal conductive gel, which has the advantages of using the size of the oil seepage circle instead of the mass proportion to reflect the oil seepage situation and amplify the difference. While retaining the digital presentation, the intuitive feeling of the naked eye is clearer, and it can more conveniently simulate the test requirements of different scenarios, thereby solving the problems existing in the three methods in the background technology.
[0006] To achieve the above objectives, the present invention provides the following technical solutions: a device for evaluating the oil permeability of a thermally conductive gel, comprising a base, a heating plate, and an integrated oil temperature controller. The base is provided with a level droplet, which refers to a plane formed by completely still water and is used to determine the levelness of the base. The base is provided with three supporting legs arranged in an equilateral triangle, one of which is fixed and the other two are adjustable in height.
[0007] The base is disc-shaped with the disc facing upwards. The heating plate is embedded in the base. A coil is welded to the bottom of the heating plate. A thermal oil inlet and a thermal oil outlet are provided on both sides of the coil. The thermal oil inlet and the thermal oil outlet are located on the same side of the heating plate. Both the thermal oil inlet and the thermal oil outlet are connected to a hose, and both the thermal oil inlet and the thermal oil outlet are connected to the integrated oil temperature controller through the hose.
[0008] A gap is formed between the base and the heating plate, and the gap is filled with insulation material. A 2mm high frame is formed on the edge of the heating plate. The frame is used to fix four templates placed on the heating plate. The four templates have the same area and shape.
[0009] As a preferred embodiment: side grooves are formed on the outside of the two height-adjustable support legs, and knobs are rotated in the two side grooves; an inner groove is formed inside the support legs, and two mutually meshing bevel gears are provided in the inner groove; the knobs are designed horizontally, and a person can reach into the side grooves to rotate the knobs by hand; one of the two bevel gears is designed horizontally and the other is designed vertically.
[0010] As a preferred embodiment, the two bevel gears are coaxially connected to inner support shafts, and the knob is coaxially connected to one of the inner support shafts, so that when the knob is rotated, the two inner support shafts and the bevel gears thereon can be driven to rotate.
[0011] As a preferred embodiment: a movable bottom groove is formed on the bottom wall of the supporting foot, and a screw rod, a lifting seat and two vertical rods are arranged in the movable bottom groove; wherein the two vertical rods are symmetrically distributed on both sides of the screw rod.
[0012] As a preferred embodiment, the screw is coaxially connected to another inner support shaft, the two vertical rods are welded in the movable bottom groove, the lifting seat is threadedly sleeved on the screw, and the lifting seat is also slidably sleeved on the two vertical rods; so that the screw can drive the lifting seat to rise and fall with the two vertical rods when it is in operation.
[0013] As a preferred embodiment: an extension rod and a movable support are provided below the lifting seat, wherein connecting shafts are provided on both sides of the extension rod, and the extension rod is connected to the lifting seat and the movable support respectively through two connecting shafts; when the lifting seat descends and drives the movable support to gradually extend out of the movable bottom groove, the angle of the base will change. At this time, the movable support can still remain horizontal under the action of the connecting shaft thereon, so that its bottom is completely in contact with the ground. At this time, the lifting seat and the supporting legs can both tilt to a certain extent, but it does not affect the various structures.
[0014] As a preferred embodiment: each template is provided with a circular or elongated hollow; the template is made of polytetrafluoroethylene.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention fixes the contact area between the thermally conductive gel and the test medium through a template, so that the test results are more accurate and easy to operate. The size of the oil leakage ring is used instead of the mass percentage to reflect the oil leakage situation, which can amplify the difference. While retaining the data presentation, the intuitive feeling of the naked eye is clearer, and the test requirements of different scenarios can be simulated more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the heating plate structure of the present utility model;
[0018] Figure 3 It is a vertical cross-sectional view of the support leg of the present invention.
[0019] The reference numerals and names in the figure are as follows: 1. Base; 2. Horizontal droplet; 3. Support foot; 4. Heating plate; 5. Coil; 6. Thermal oil inlet; 7. Thermal oil outlet; 8. Template; 9. Integrated oil temperature controller; 10. Hose; 11. Frame; 12. Side groove; 13. Knob; 14. Inner groove; 15. Bevel gear; 16. Inner support shaft; 17. Movable bottom groove; 18. Screw; 19. Vertical rod; 20. Lifting seat; 21. Extension rod; 22. Connecting shaft; 23. Movable support. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.
[0022] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.
[0023] See also Figures 1 to 2 The present invention provides an embodiment of a device for evaluating the oil seepage performance of a thermally conductive gel, comprising a base 1, a heating plate 4, and an integrated oil temperature controller 9. A horizontal droplet 2 is provided on the base 1. The horizontal droplet 2 refers to a plane formed by completely still water, which is used to determine the levelness of the base 1. Three supporting legs 3 are provided under the base 1. The three supporting legs 3 are distributed in an equilateral triangle, one of which is fixed and the other two are adjustable in height. The base 1 is disc-shaped with the disc facing upwards. The heating plate 4 is embedded in the base 1. A coil 5 is welded to the bottom of the heating plate 4. A heat transfer oil inlet 6 and a heat transfer oil inlet are provided on both sides of the coil 5. The hot oil outlet 7, the thermal oil inlet 6 and the thermal oil outlet 7 are located on the same side of the heating plate 4, and the thermal oil inlet 6 and the thermal oil outlet 7 are connected to a hose 10, and the thermal oil inlet 6 and the thermal oil outlet 7 are connected to the integrated oil temperature machine 9 through the hose 10. A gap is formed between the base 1 and the heating plate 4, and the gap is filled with insulation material. A 2mm high frame 11 is formed on the edge of the heating plate 4. The frame 11 is used to fix four templates 8 placed on the heating plate 4. The four templates 8 have the same area and shape. Each template 8 is provided with a circular or elongated hollow, and the template 8 is made of polytetrafluoroethylene.
[0024] See also Figure 3 A side groove 12 is formed on the outside of the two height-adjustable support legs 3, and a knob 13 is rotated in each side groove 12. An inner groove 14 is formed inside the support leg 3, and two mutually meshing bevel gears 15 are provided in the inner groove 14. The knob 13 is designed horizontally and can be manually inserted into the side groove 12 to rotate the knob 13. One of the two bevel gears 15 is designed horizontally and the other is designed vertically. The two bevel gears 15 are coaxially connected to an inner support shaft 16. The knob 13 is coaxially connected to one of the inner support shafts 16, so that when the knob 13 is rotated, the two inner support shafts 16 and the bevel gears 15 thereon are driven to rotate. A movable bottom groove 17 is formed on the bottom wall of the support leg 3, and a screw rod 18, a lifting seat 20 and two vertical rods 19 are arranged in the movable bottom groove 17. The two vertical rods 19 are symmetrically distributed on both sides of the screw rod 18. The screw rod 18 is coaxially connected to the other inner support shaft 16, and the two vertical rods 19 are welded to the movable bottom groove 17.
[0025] In addition, the lifting seat 20 is threadedly sleeved on the screw 18, and the lifting seat 20 is also slidably sleeved on the two vertical rods 19, so that the screw 18 can drive the lifting seat 20 to rise and fall along with the two vertical rods 19 during operation. An extension rod 21 and a movable support 23 are provided below the lifting seat 20, wherein connecting shafts 22 are provided on both sides of the extension rod 21, and the extension rod 21 is respectively connected to the lifting seat 20 and the movable support 23 through two connecting shafts 22. When the lifting seat 20 descends and drives the movable support 23 to gradually extend out of the movable bottom groove 17, the angle of the base 1 will change. At this time, the movable support 23 can still remain horizontal under the action of the connecting shaft 22 thereon, so that its bottom is completely in contact with the ground. At this time, the lifting seat 20 and the supporting leg 3 can both tilt to a certain extent, but it does not affect the various structures.
[0026] Working principle: When the utility model is in operation, first adjust the two supporting feet 3 to keep the base 1 level. When adjusting: turn the knob 13 to drive the two bevel gears 15 and the two inner support shafts 16 to operate, so that the screw 18 rotates accordingly, and the lifting seat 20 descends along with the two vertical rods 19, driving the extension rod 21, the connecting shaft 22, and the movable support 23 to descend, so that the movable support 23 extends from the movable bottom groove 17, so that the base 1 is adjusted when it is not level. Finally, the leveling drop 2 is used to determine whether the base 1 is level. If it is not level, continue to adjust until the base 1 is level.
[0027] Then, oil-absorbing paper or filter paper is laid on the heating plate 4. Then, the template 8 is placed on the heating plate 4, and the hollow space of the template 8 is filled with the thermal conductive gel to be tested. The template 8 has a variety of thicknesses to choose from, with five specifications ranging from 1mm to 5mm (1mm, 2mm, 3mm, 4mm and 5mm respectively). The hollow space is conventionally round and long. The integrated oil temperature controller 9 is turned on to circulate constant temperature thermal oil into the coil 5. After the set test time, the diameter of the oil ring that seeps out of the oil-absorbing paper or filter paper is measured to determine the oil leakage situation. By setting different thermal oil temperatures to simulate actual application scenarios, different data can be obtained. The configuration of thermal oil + coil 5 can make the thermal conductive gel heat more evenly. For thermal conductive gels with different densities, the hollow space of the template 8 can be completely filled to compare the oil leakage of the same volume of gel. For thermal conductive gels with the same density, the same weight of gel can be filled to compare the oil leakage situation.
[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
Claims
1. A device for evaluating the oil permeability of a thermally conductive gel, comprising a base (1), a heating plate (4), and an integrated oil temperature controller (9), characterized in that: A horizontal droplet (2) is provided on the base (1), and three supporting legs (3) are provided below the base (1), wherein the three supporting legs (3) are distributed in an equilateral triangle, wherein one of the supporting legs (3) is fixed, and the other two supporting legs (3) are height-adjustable; The base (1) is disc-shaped with the opening facing upwards, the heating plate (4) is embedded in the base (1), a coil (5) is welded to the bottom of the heating plate (4), a heat transfer oil inlet (6) and a heat transfer oil outlet (7) are respectively provided on both sides of the coil (5), the heat transfer oil inlet (6) and the heat transfer oil outlet (7) are located on the same side of the heating plate (4), the heat transfer oil inlet (6) and the heat transfer oil outlet (7) are both connected to a hose (10), and the heat transfer oil inlet (6) and the heat transfer oil outlet (7) are both connected to the integrated oil temperature machine (9) through the hose (10); A gap is formed between the base (1) and the heating plate (4), and the gap is filled with heat-insulating material. A 2mm high frame (11) is formed on the edge of the heating plate (4), and the frame (11) is used to fix four templates (8) placed on the heating plate (4). The four templates (8) have the same area and shape.
2. The device for evaluating the oil seepage performance of thermally conductive gel according to claim 1, wherein: Side grooves (12) are formed on the outer sides of the two height-adjustable support legs (3), and knobs (13) are rotated in the two side grooves (12). An inner groove (14) is formed inside the support legs (3), and two mutually meshing bevel gears (15) are provided in the inner groove (14).
3. The device for evaluating the oil seepage performance of thermally conductive gel according to claim 2, wherein: The two bevel gears (15) are coaxially connected to inner support shafts (16), and the knob (13) is coaxially connected to one of the inner support shafts (16).
4. The device for evaluating the oil seepage performance of thermally conductive gel according to claim 3, wherein: A movable bottom groove (17) is formed on the bottom wall of the supporting foot (3), and a screw rod (18), a lifting seat (20) and two vertical rods (19) are arranged in the movable bottom groove (17).
5. The device for evaluating the oil seepage performance of thermally conductive gel according to claim 4, characterized in that: The screw rod (18) is coaxially connected to another inner support shaft (16), and the two vertical rods (19) are welded in the movable bottom groove (17). The lifting seat (20) is threadedly sleeved on the screw rod (18), and the lifting seat (20) is also slidably sleeved on the two vertical rods (19).
6. The device for evaluating the oil seepage performance of thermally conductive gel according to claim 5, characterized in that: An extension rod (21) and a movable support (23) are provided below the lifting seat (20), wherein connecting shafts (22) are provided on both sides of the extension rod (21), and the extension rod (21) is respectively connected to the lifting seat (20) and the movable support (23) through the two connecting shafts (22).
7. The device for evaluating the oil seepage performance of thermally conductive gel according to claim 1, wherein: Each of the templates (8) is provided with a circular or elongated hollow.