Auxiliary device suitable for low-temperature friction performance test

Abstract

The utility model provides an auxiliary device suitable for low-temperature friction performance test, which comprises a cylindrical cavity shell, a cavity heat preservation cover and a heat preservation assembly located in the cavity shell, the cavity heat preservation cover covers the round cavity shell, and the heat preservation assembly comprises a sealing cover, a second heat preservation foam body, a third heat preservation foam body and a cooling pipeline structure. The second heat preservation foam body is fixed to the inner side face of the sealing cover, the outer diameter of the sealing cover is larger than the inner diameter of the cavity shell, the sealing cover and the second heat preservation foam body are each provided with a round hole allowing the fixing block to penetrate through, and the third heat preservation foam body is fixed to the bottom in the cavity shell. The cooling pipeline structure is fixed between the second heat preservation foam body and the third heat preservation foam body, and holes allowing the two ends of the cooling pipeline structure to stretch out are formed in the side wall of the cavity shell. The bottom of the cavity heat preservation cover, the bottom of the fixing block, the bottom of the sealing cover, the bottom of the second heat preservation foam body, the bottom of the third heat preservation foam body and the bottom of the cavity shell are each provided with coaxial and same-inner-diameter circular holes.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment, specifically to an auxiliary device suitable for low-temperature friction performance testing. Background Technology

[0002] Mechanical equipment inevitably faces friction and wear during operation. A single piece of machinery contains numerous mechanical parts, and the friction and wear characteristics of these parts directly affect the overall wear level and service life of the equipment. In northern China, where winter temperatures are low, the friction and wear issues encountered during the operation of various mechanical equipment are significantly impacted. Therefore, investigating friction and wear under low-temperature conditions is of great importance. This invention designs a low-temperature chamber device for use with a friction and wear testing machine, facilitating friction and wear experiments on samples within the low-temperature chamber.

[0003] Currently, there are few existing low-temperature chamber devices that can be used with friction and wear testing machines, and they suffer from a series of problems such as excessive equipment size, difficult installation, and complex operation. This greatly limits the exploration and research on the properties of low-temperature friction and wear. Summary of the Invention

[0004] The problem to be solved by this utility model is to provide an auxiliary device for testing low-temperature friction performance, which overcomes the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an auxiliary device for testing low-temperature friction performance, including a cylindrical cavity shell, a cavity insulation cover and an insulation component located inside the cavity shell, wherein the space inside the cavity shell is a cylindrical low-temperature cavity, and the cavity insulation cover is fitted onto the top of the cylindrical low-temperature cavity;

[0006] The insulation component includes a sealing cap, a second insulating foam body, a third insulating foam body, and a cooling pipe structure. The second insulating foam body is fixed to the inner side of the sealing cap, and the outer diameter of the sealing cap is larger than the inner diameter of the cavity shell. The third insulating foam body is fixed to the bottom inside the cavity shell. The cooling pipe structure is a cylindrical structure. The surfaces of the second and third insulating foam bodies have annular grooves one and two, respectively, that allow the two ends of the cylindrical structure to extend into them. The sidewall of the cylindrical low-temperature cavity has holes that allow the two ends of the cooling pipe structure to extend out.

[0007] The cavity insulation cover, the sealing cover, and the top surface of the cavity shell are fixed by bolts. The cavity insulation cover, the sealing cover, the second insulation foam body, the third insulation foam body, and the bottom of the cavity shell all have coaxial circular holes.

[0008] Optionally, the cavity insulation cover includes a disc-shaped cover and a fixing block. The fixing block is fixed to the inner side of the disc-shaped cover. The fixing block has an embedded insulation foam body one. The fixing block can pass through the circular holes on the sealing cover and the insulation foam body two.

[0009] Optionally, the lower part of the outer side of the cavity shell has a locking buckle.

[0010] Optionally, the cooling pipe structure is a serpentine cooling pipe.

[0011] Optionally, the bottom surface of the cavity shell has a plurality of concentric and spaced annular slots.

[0012] The advantages and positive effects of this utility model are:

[0013] 1. This utility model has a compact structure, small size, light weight, and simple installation. It can be effectively assembled on the base of the friction and wear testing machine, which facilitates the research of low-temperature friction and wear experiments.

[0014] 2. The low-temperature cooling mechanism of this utility model is stable and effective. It requires an external low-temperature constant temperature bath. A specific cooling medium, such as ethylene glycol antifreeze coolant, is introduced into the serpentine cooling pipe. The temperature can reach as low as -45°C, thereby achieving a low-temperature environment inside the cavity.

[0015] 3. The interior of this utility model has a structure that is open at both the top and bottom. The upper part facilitates the insertion of the friction ball clamp of the friction and wear testing machine, while the lower part facilitates the assembly of the base of the friction and wear testing machine. The friction test sample is then installed and fixed on the base, and the low-temperature friction and wear test can be carried out smoothly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of this utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the middle cavity;

[0018] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle cavity insulation cover;

[0019] Figure 4 This is a schematic diagram of the bottom structure of thermal insulation foam II;

[0020] Figure 5 yes Figure 1 Schematic diagram of the outer shell structure of the middle cavity;

[0021] Figure 6 yes Figure 1 Schematic diagram of the lower surface structure of the inner cavity shell;

[0022] In the diagram: 1. Insulation cover for the cavity; 2. Outer shell of the cavity; 2-1. Annular groove; 3. Snake-shaped cooling pipe; 4. Sealing cover; 5. Insulation foam body two; 5-1. Annular groove one; 6. Insulation foam body three; 6-1. Annular groove two; 7. Disc-shaped cover; 7-1. Circular groove; 8. Insulation foam body one; 9. Fixing block; 10. Hole; 11. Locking buckle. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention. In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

[0024] like Figure 1 As shown, this utility model provides a low-temperature chamber device for the base of a friction and wear testing machine, including a chamber insulation cover 1, a chamber outer shell 2, and a serpentine cooling pipe 3; the space inside the chamber insulation cover 1 is a cylindrical low-temperature chamber, such as... Figure 3 As shown, the cavity insulation cover 1 includes a disc-shaped cover 7, an insulation foam body 8, and a fixing block 9. The insulation foam body 8 is embedded in the fixing block 9. The fixing block 9 and the disc-shaped cover 7 both have threaded holes arranged in a circumferential direction in the circular groove on the lower surface. The two are connected and fixed together by screws. In this way, the disc-shaped cover 7, the insulation foam body 8, and the fixing block 9 together constitute the structure of the cavity insulation cover 1.

[0025] like Figure 2 As shown, the cylindrical cryogenic cavity contains a sealing cap 4, a second insulating foam body 5, a serpentine cooling pipe 3, and a third insulating foam body 6, as shown. Figure 4As shown, the lower surface of the sealing cap 4 and the upper surface of the insulating foam body 5 are bonded together with adhesive. They are concentric. Both the sealing cap 4 and the insulating foam body 5 have through-holes to allow the fixing block 9 to pass through during assembly with the cavity insulation cap 1. The lower surface of the insulating foam body 5 has an annular groove 5-1 with a depth of 8mm. The lower surface of the insulating foam body 6 is bonded to the bottom of the inner cavity of the cavity shell 2. The cavity insulation cap 1, sealing cap 4, insulating foam body 5, insulating foam body 6, and the bottom of the cavity shell 2 all have circular holes of a certain size, such as... Figure 5 As shown, the upper surface of the thermal insulation foam body 6 has an annular groove 6-1 with a depth of 8mm, which is the same size as the annular groove 5-1 of the thermal insulation foam body 5, and they are arranged concentrically. Figure 2 As shown, the serpentine cooling pipe 3 is fixed between the annular groove 5-1 of the second insulating foam body 5 and the annular groove 6-1 of the third insulating foam body 6, and simultaneously... Figure 5 , Figure 6 As shown, the circumferential sidewall of the cavity shell 2 is provided with a pair of holes 10 of equal size to facilitate the connection of the inlet and outlet of the serpentine cooling pipe 3. Locking buckles 11 are provided on both sides of the lower part of the circumferential sidewall of the cavity shell 2. The two are connected and fixed together by screws. In this way, the sealing cover 4, the second insulating foam body 5, the serpentine cooling pipe 3, the third insulating foam body 6, the cavity shell 10 and the locking buckles 11 together form the insulation component in the cylindrical low temperature cavity. The cavity insulation cover 1 and the cavity shell 2 are connected and assembled together by screws to form this utility model. The bottom surface of the cavity shell 2 has multiple concentric and equal-depth annular grooves 2-1 to facilitate the installation and positioning of the cavity shell 2 on the friction and wear testing machine, and at the same time, it can also reduce the weight of the device.

[0026] In use, the above structure needs to be placed on the base of the friction and wear testing machine, and the two are fixed together by locking buckle 11. The clamping platform of the base is smoothly set inside the cylindrical low temperature chamber of this utility model through the circular hole located at the bottom of the cavity shell 2, and the friction test sample is fixed on the clamping platform of the base. This utility model requires an external low temperature constant temperature bath device, which is connected to the inlet and refrigerant outlet of the serpentine cooling pipe 3. A cooling medium, such as ethylene glycol antifreeze, is introduced into the serpentine cooling pipe 3, which can reach a minimum temperature of -45°C, thereby realizing the construction of a low temperature environment and ensuring the smooth progress of subsequent low temperature friction and wear experiments.

[0027] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. An auxiliary device for testing low-temperature friction properties, characterized in that: It includes a cylindrical cavity shell, a cavity insulation cover, and an insulation component located inside the cavity shell. The space inside the cavity shell is a cylindrical low-temperature cavity, and the cavity insulation cover is placed on top of the cylindrical low-temperature cavity. The insulation component includes a sealing cap, a second insulating foam body, a third insulating foam body, and a cooling pipe structure. The second insulating foam body is fixed to the inner side of the sealing cap, and the outer diameter of the sealing cap is larger than the inner diameter of the cavity shell. The third insulating foam body is fixed to the bottom inside the cavity shell. The cooling pipe structure is a cylindrical structure. The surfaces of the second and third insulating foam bodies have annular grooves one and two, respectively, that allow the two ends of the cylindrical structure to extend into them. The sidewall of the cylindrical low-temperature cavity has holes that allow the two ends of the cooling pipe structure to extend out. The cavity insulation cover, the sealing cover, and the top surface of the cavity shell are fixed by bolts. The cavity insulation cover, the sealing cover, the second insulation foam body, the third insulation foam body, and the bottom of the cavity shell all have coaxial circular holes.

2. The auxiliary device for low-temperature friction performance testing according to claim 1, characterized in that: The cavity insulation cover includes a disc-shaped cover and a fixing block. The fixing block is fixed to the inner side of the disc-shaped cover. The fixing block has an embedded insulation foam body one. The fixing block can pass through the circular holes on the sealing cover and the insulation foam body two.

3. The auxiliary device for low-temperature friction performance testing according to claim 1, characterized in that: The lower part of the outer side of the cavity shell has a locking buckle.

4. The auxiliary device for low-temperature friction performance testing according to claim 2, characterized in that: The cooling pipe structure is a serpentine cooling pipe.

5. The auxiliary device for low-temperature friction performance testing according to any one of claims 1-4, characterized in that: The bottom surface of the cavity shell has multiple concentric annular grooves of the same depth.

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