Teflon cloth bearing

Abstract

The utility model relates to a Teflon cloth bearing which comprises a metal outer layer, a Teflon cloth layer is compounded on the inner wall of the metal outer layer through an adhesive layer, the metal outer layer is C-shaped, a sand blasting layer is arranged on the inner wall of the metal outer layer and / or the outer wall of the Teflon cloth layer, and the outer wall of the metal outer layer and / or the outer wall of the Teflon cloth layer is provided with a sand blasting layer. And the thickness of the sand blasting layer is smaller than that of the metal outer layer or the teflon cloth layer. According to the present invention, the sand blasting layer is additionally arranged on the metal outer layer and the polytetrafluoroethylene cloth layer, such that the composite position has the large roughness so as to achieve the firm adhesion of the adhesive layer, and the service life is prolonged.

Description

Technical Field

[0001] The present application belongs to the field of mechanical processing, and in particular relates to a polytetrafluoroethylene cloth bearing. Background Art

[0002] PTFE cloth (polytetrafluoroethylene cloth, PTFE cloth) is widely used in various industrial fields due to its unique chemical properties and excellent physical properties. PTFE cloth has excellent corrosion resistance to most chemical substances, so it is very suitable for use in the chemical industry and can resist strong acids, strong alkalis and various organic solvents. PTFE cloth can be used for a long time at high temperatures, and the temperature resistance range can usually reach -200℃ to +260℃, which is very suitable for applications in high temperature environments. The surface of PTFE cloth has a very low friction coefficient and excellent anti-adhesion properties, which can effectively prevent material adhesion and facilitate cleaning and maintenance. PTFE cloth is a good electrical insulating material and can be used in electrical equipment to provide safe insulation performance. PTFE cloth has high wear resistance, can effectively resist wear and extend service life. PTFE cloth can be made into various shapes and sizes, suitable for different application requirements, and can also be used in combination with other materials to enhance performance.

[0003] In the prior art, the composite part between the PTFE cloth layer and the metal outer layer in the PTFE cloth bearing is prone to cracking and falling off, which affects the service life and working effect of the PTFE cloth bearing. Utility Model Content

[0004] The utility model aims at the above problems and provides a polytetrafluoroethylene cloth bearing which can solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The PTFE cloth bearing comprises a metal outer layer, a PTFE cloth layer is compounded on the inner wall of the metal outer layer through an adhesive layer, the metal outer layer is C-shaped, a sandblasting layer is provided on the inner wall of the metal outer layer and / or the outer wall of the PTFE cloth layer, the thickness of the sandblasting layer is less than the thickness of the metal outer layer or the PTFE cloth layer, and at least part of the adhesive layer is embedded in the sandblasting layer.

[0007] Furthermore, a sandblasting layer is provided on the inner wall of the metal outer layer, and the roughness of the sandblasting layer is greater than the surface roughness of the polytetrafluoroethylene cloth layer.

[0008] Furthermore, a sandblasting layer is provided on the outer wall of the polytetrafluoroethylene cloth layer, and the surface roughness of the sandblasting layer provided on the polytetrafluoroethylene cloth layer is greater than the surface roughness of the sandblasting layer provided on the inner wall of the metal outer layer.

[0009] Furthermore, in the axial direction of the metal outer layer, two ends of the polytetrafluoroethylene cloth layer are located inside two ends of the inner wall of the metal outer layer.

[0010] Furthermore, inner chamfers are provided at both ends of the inner wall of the metal outer layer, and outer chamfers are provided at both ends of the outer wall of the metal outer layer.

[0011] Furthermore, connecting chamfers connecting the inner chamfers are provided at both ends of the polytetrafluoroethylene cloth layer.

[0012] Furthermore, the thickness of the metal outer layer is greater than the thickness of the polytetrafluoroethylene cloth layer.

[0013] Compared with the existing technology, the advantages of the present application are: adding a sandblasting layer to the metal outer layer and the PTFE cloth layer makes the composite part have a greater roughness, which can greatly improve the connection firmness between the PTFE cloth layer and the metal outer layer, thereby achieving the effect of extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the main structure of the polytetrafluoroethylene cloth bearing of the utility model;

[0015] Figure 2 This is a side view of the main structure of the PTFE cloth bearing of the utility model;

[0016] Figure 3 for Figure 2 A magnified detail of the structure in the middle A area;

[0017] Figure 4 This is a diagram showing the relative positions of the components of each layer of the polytetrafluoroethylene cloth bearing of the present invention.

[0018] In the figure, there is a metal outer layer 1, an inner chamfer 10, an outer chamfer 11, an adhesive layer 2, a polytetrafluoroethylene cloth layer 3, a connecting chamfer 30, and a sandblasting layer 4. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0023] Embodiment 1, as Figure 4 As shown, the polytetrafluoroethylene cloth bearing of this embodiment includes a metal outer layer 1, and a polytetrafluoroethylene cloth layer 3 is compounded on the inner wall of the metal outer layer 1 through an adhesive layer 2. In this embodiment, the metal outer layer 1 is made of a metal plate through bending processing, wherein a sandblasting layer 4 is arranged on the inner wall of the metal outer layer 1, and the function of the sandblasting layer 4 is to increase the surface roughness of the inner wall of the metal outer layer 1, so as to better adhere and fix with the polytetrafluoroethylene cloth layer 3, and at least part of the adhesive layer 2 is embedded in the sandblasting layer 4. In particular, the thickness of the sandblasting layer 4 arranged on the inner wall surface of the above-mentioned metal outer layer 1 is less than the thickness of the above-mentioned metal outer layer 1 or the polytetrafluoroethylene cloth layer 3, and the roughness of the sandblasting layer 4 arranged on the inner wall surface of the metal outer layer 1 is greater than the surface roughness of the polytetrafluoroethylene cloth layer 3.

[0024] At the same time, the above-mentioned metal outer layer 1 has a C-shaped curved structure. This design allows the PTFE cloth bearing to adapt to shaft diameters of different sizes and can be fine-tuned within a certain range to meet the requirements of different equipment and applications, provide a consistent contact surface, and ensure good precision and stability.

[0025] To ensure that the metal outer layer 1 can provide stable protection for the PTFE cloth layer 3, the thickness of the metal outer layer 1 is greater than the thickness of the PTFE cloth layer 3. The metal outer layer 1 can be any one of a stainless steel outer layer, an aluminum alloy outer layer and a titanium alloy outer layer.

[0026] In the axial direction of the metal outer layer 1 , the two ends of the polytetrafluoroethylene cloth layer 3 are located inside the two ends of the inner wall of the metal outer layer 1 , which prevents excessive wear of the edges of the polytetrafluoroethylene cloth layer 3 by interactive equipment in a working environment, causing the edge of the polytetrafluoroethylene cloth layer 3 to fray.

[0027] At the same time, if Figure 3 As shown, inner chamfers 10 are provided at both ends of the axial inner wall of the metal outer layer 1, and outer chamfers 11 are provided at both ends of the axial outer wall of the metal outer layer 1. The inner chamfers 10 and the outer chamfers 11 can reduce the appearance of burrs and sharp edges during processing, thereby improving the processing accuracy and surface finish of the parts and ensuring the matching accuracy between components. In addition, the inner chamfers 10 and the outer chamfers 11 can make the parts smoother during assembly and reduce wear and damage to adjacent parts. Especially in dynamic interfaces, chamfers can improve the ease of docking of parts and simplify the production process.

[0028] like Figure 3 As shown, connecting chamfers 30 with the inner chamfers 10 are provided at both ends of the above-mentioned polytetrafluoroethylene cloth layer 3. The connecting chamfers 30 can reduce the area of ​​the polytetrafluoroethylene cloth layer 3 when it contacts other parts, and provide better transition assembly, so that the fit between the polytetrafluoroethylene cloth layer 3 and the surrounding parts is tighter. In addition, the existence of the connecting chamfers 30 can also reduce the stress concentration effect and extend the service life of the material.

[0029] Embodiment 2: The structure and principle of this embodiment are basically the same as those of Embodiment 1, and the difference lies in that, in contrast to the sandblasting layer of the above-mentioned Embodiment 1, this embodiment provides a sandblasting layer on the outer wall of the polytetrafluoroethylene cloth layer.

[0030] In this embodiment, in order to ensure the adhesion quality between the metal outer layer 1 and the polytetrafluoroethylene cloth layer 3, a sandblasting layer 4 can be provided on the outer wall of the polytetrafluoroethylene cloth layer 3 according to the actual working conditions. The condition is that the surface roughness of the sandblasting layer 4 provided on the polytetrafluoroethylene cloth layer 3 is greater than the surface roughness of the sandblasting layer 4 provided on the inner wall of the metal outer layer 1. Through the different designs of roughness, the adhesive layer 2 can be respectively embedded in different sandblasting layers 4, and the embedding amount of the adhesive layer 2 in the corresponding sandblasting layer 4 is also different, so as to improve the adhesion between the metal outer layer 1 and the polytetrafluoroethylene cloth layer 3. Secondly, two layers of sandblasting layers 4 are provided, which further expand the connection area with the adhesive layer 2; in addition, the sandblasting layer 4 with a larger roughness is provided on the outer wall of the polytetrafluoroethylene cloth layer 3, and the adhesive layer 2 embedded in the sandblasting layer 4 has a larger amount of glue or a deeper glue depth, because the inner wall of the polytetrafluoroethylene cloth layer 3 is in contact with the working surface, and by increasing the amount of glue, more implantation or embedding is achieved, so as to achieve the purpose of preventing the metal outer layer 1 and the polytetrafluoroethylene cloth layer 3 from being offset and falling off due to high temperature or vibration.

[0031] The rough surface of the sandblasting layer 4 can increase the contact area between the two, thereby improving the strength of the adhesion and ensuring that it still maintains its stability and reliability in harsh working environments. In addition, the reasonable selection of an adhesive that matches the sandblasting layer 4 can further improve the bonding effect. When selecting an adhesive, it should be ensured that it has good high temperature resistance and compatibility with the PTFE cloth layer 3 and the metal outer layer 1 to meet actual application requirements.

[0032] The sandblasting layer 4 may have different distribution patterns on the inner wall of the metal outer layer 1 and / or the outer wall of the PTFE cloth layer 3, such as stripes, spaced blocks, etc. This design will not affect the roughness and can achieve the same fixing effect.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A polytetrafluoroethylene cloth bearing, comprising a metal outer layer (1), a polytetrafluoroethylene cloth layer (3) being compounded on the inner wall of the metal outer layer (1) via an adhesive layer (2), characterized in that: The metal outer layer (1) is C-shaped, and a sandblasting layer (4) is provided on the inner wall of the metal outer layer (1) and / or the outer wall of the polytetrafluoroethylene cloth layer (3), the thickness of the sandblasting layer (4) is smaller than the thickness of the metal outer layer (1) or the polytetrafluoroethylene cloth layer (3), and at least a portion of the adhesive layer (2) is embedded in the sandblasting layer (4).

2. The polytetrafluoroethylene cloth bearing according to claim 1, characterized in that: A sandblasting layer (4) is provided on the inner wall of the metal outer layer (1), and the roughness of the sandblasting layer (4) is greater than the surface roughness of the polytetrafluoroethylene cloth layer (3).

3. The polytetrafluoroethylene cloth bearing according to claim 1, characterized in that: A sandblasting layer (4) is provided on the outer wall of the polytetrafluoroethylene cloth layer (3), and the surface roughness of the sandblasting layer (4) provided on the polytetrafluoroethylene cloth layer (3) is greater than the surface roughness of the sandblasting layer (4) provided on the inner wall of the metal outer layer (1).

4. The polytetrafluoroethylene cloth bearing according to claim 1, characterized in that: In the axial direction of the metal outer layer (1), two ends of the polytetrafluoroethylene cloth layer (3) are located inside two ends of the inner wall of the metal outer layer (1).

5. The polytetrafluoroethylene cloth bearing according to claim 1 or 4, characterized in that: Inner chamfers (10) are provided at both ends of the inner wall of the metal outer layer (1), and outer chamfers (11) are provided at both ends of the outer wall of the metal outer layer (1).

6. The polytetrafluoroethylene cloth bearing according to claim 5, characterized in that: Connecting chamfers (30) for connecting the inner chamfers (10) are provided at both ends of the polytetrafluoroethylene cloth layer (3).

7. The polytetrafluoroethylene cloth bearing according to claim 1, characterized in that: The thickness of the metal outer layer (1) is greater than the thickness of the polytetrafluoroethylene cloth layer (3).

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