Novel bearing sleeve insulation structure
By incorporating a metal-insulation-metal sandwich structure and a dovetail-shaped insulating ring in the bearing sleeve, the problem of poor thermal conductivity of the insulating material is solved, achieving efficient heat dissipation and extending the service life of the bearing.
Patent Information
- Application Number
- CN202520741691.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-04-18
AI Technical Summary
The insulation material of existing motor bearing sleeves has poor thermal conductivity, resulting in poor heat dissipation, which in turn exacerbates grease aging and bearing metal fatigue.
The metal-insulation-metal sandwich structure utilizes the high thermal conductivity of metal to conduct heat laterally, and increases the contact area through a dovetail-shaped insulating ring and seals the micro-gaps at the interface with adhesive to reduce thermal resistance.
It significantly improves the heat dissipation efficiency of the bearing sleeve and reduces the risk of grease aging and bearing metal fatigue.
Smart Images
Figure CN223839584U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing sleeve technology, specifically a novel bearing sleeve insulation structure. Background Technology
[0002] Motor bearing insulating sleeves are important components in motor products. They are bearing sleeves with insulating properties used to solve the problem of electro-corrosion of bearings caused by shaft current during motor operation, protect the bearings, and extend their service life.
[0003] In the existing technology, most motor products use bearing sleeves. Usually, insulating materials are used in the inner diameter and side wall of the bearing sleeve to achieve bearing insulation and cut off shaft current. However, the thermal conductivity of the insulating material is usually poor, which may hinder the heat dissipation of the bearing system, resulting in excessive temperature rise, which will accelerate the aging of grease or bearing metal fatigue.
[0004] In view of this, in order to overcome the above-mentioned technical problems, this utility model proposes a novel bearing sleeve insulation structure, which solves the above-mentioned technical problems. Utility Model Content
[0005] To overcome the shortcomings of existing technologies, this invention proposes a novel bearing sleeve insulation structure. This invention places the insulating material of the bearing sleeve in the middle, forming a "metal-insulation-metal" sandwich structure between the metal and the insulating layer. Utilizing the high thermal conductivity of the metal, heat is effectively dissipated laterally, allowing the insulating layer to bear only localized axial thermal resistance. Compared to a fully enclosed insulation structure, this design significantly reduces overall thermal resistance and improves heat dissipation efficiency. Furthermore, the insulating ring is tightly connected to the bearing sleeve in a dovetail groove shape, allowing the inclined interlocking structure of the dovetail groove to increase the contact area between the insulating ring and the bearing sleeve, significantly reducing contact thermal resistance. The ends are sealed with adhesive to completely fill the interface gaps, preventing air layers from hindering heat conduction and further improving heat dissipation efficiency, thereby reducing grease aging or bearing metal fatigue.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A novel bearing sleeve insulation structure of this utility model includes a bearing sleeve and an insulating layer. The bearing sleeve includes an inner ring sleeve and an outer ring sleeve. The inner ring sleeve has a threaded groove and a positioning groove on its surface. The outer ring sleeve has a threaded hole on its surface. The insulating layer is located between the inner ring sleeve and the outer ring sleeve. Both the inner ring sleeve and the outer ring sleeve are made of high-carbon chromium steel. An insulating ring is provided between the inner ring sleeve and the outer ring sleeve. Two insulating rings are provided. The two insulating rings are distributed at both ends of the insulating layer. The insulating ring is fixedly connected to the insulating layer, the inner ring sleeve, and the outer ring sleeve by adhesive coating.
[0007] Preferably, the cross-sectional shape of the insulating ring is set to the shape of a dovetail groove.
[0008] Preferably, the inner ring sleeve has a groove on its inner wall; the outer ring sleeve has a slot on its inner wall that is directly opposite the groove; the insulating layer has a through groove on its surface; and a positioning rod is slidably and sealingly connected inside the groove.
[0009] Preferably, the positioning rod includes a fixed rod and an insulating cylinder; the insulating cylinder is sleeved on one end of the fixed rod; the end of the fixed rod with the insulating cylinder sleeved is slidably and sealingly connected in the groove.
[0010] Preferably, the surface of the fixing rod is provided with an annular groove; a flange is fixedly connected to the inner wall of the insulating cylinder; the flange is rotatably and sealingly connected in the annular groove.
[0011] The beneficial effects of this utility model are as follows:
[0012] This invention creates a "metal-insulation-metal" sandwich structure by placing the insulating material of the bearing sleeve in the middle. Utilizing the high thermal conductivity of the metal, heat is effectively dissipated laterally, allowing the insulating layer to bear only localized axial thermal resistance. Compared to a fully enclosed insulation structure, this design significantly reduces overall thermal resistance and improves heat dissipation efficiency. Furthermore, the insulating ring is tightly connected to the bearing sleeve in a dovetail groove shape, allowing the inclined interlocking structure of the dovetail groove to increase the contact area between the insulating ring and the bearing sleeve, significantly reducing contact thermal resistance. The ends are sealed with adhesive to completely fill the interface gaps, preventing air layers from hindering heat conduction and further improving heat dissipation efficiency, thereby reducing grease aging or bearing metal fatigue. Attached Figure Description
[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0014] Figure 1 This is a perspective view of the present invention;
[0015] Figure 2 This is a schematic diagram of the structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the bearing sleeve with a positioning rod installed in this utility model;
[0017] Figure 4 yes Figure 3 Enlarged view of point A in the middle;
[0018] In the diagram: 1. Inner ring sleeve; 11. Threaded groove; 12. Positioning groove; 13. Groove; 2. Outer ring sleeve; 21. Threaded hole; 22. Slot; 3. Insulating layer; 31. Insulating ring; 32. Through groove; 4. Positioning rod; 41. Fixing rod; 411. Annular groove; 42. Insulating cylinder; 421. Flange. Detailed Implementation
[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0020] like Figures 1 to 4 As shown, the novel bearing sleeve insulation structure of this utility model includes the following embodiments:
[0021] Example 1: A novel bearing sleeve insulation structure includes a bearing sleeve and an insulation layer 3. The bearing sleeve includes an inner ring sleeve 1 and an outer ring sleeve 2. The inner ring sleeve 1 has a threaded groove 11 and a positioning groove 12 on its surface. The outer ring sleeve 2 has a threaded hole 21 on its surface. The insulation layer 3 is located between the inner ring sleeve 1 and the outer ring sleeve 2. Both the inner ring sleeve 1 and the outer ring sleeve 2 are made of high-carbon chromium steel. An insulating ring 31 is provided between the inner ring sleeve 1 and the outer ring sleeve 2. There are two insulating rings 31. The two insulating rings 31 are distributed at both ends of the insulation layer 3. The insulating rings 31 are fixed to the insulation layer 3, the inner ring sleeve 1, and the outer ring sleeve 2 by adhesive coating.
[0022] In this embodiment, the cross-sectional shape of the insulating ring 31 is set to the shape of a dovetail groove.
[0023] During operation, most existing motor products use bearing sleeves. Insulating materials are usually used on the inner diameter and sidewalls of the bearing sleeves to achieve bearing insulation and cut off shaft current. However, the thermal conductivity of the insulating materials is usually poor, which may hinder the heat dissipation of the bearing system, leading to excessive temperature rise and aggravating grease aging or bearing metal fatigue.
[0024] In this invention, the insulating material of the bearing sleeve is placed in the middle, forming a "metal-insulation-metal" sandwich structure between the metal and the insulating layer 3. The high thermal conductivity of the metal effectively conducts heat laterally, so that the insulating layer 3 only bears the local thermal resistance in the axial direction. Compared with the fully enclosed insulation structure, this design significantly reduces the overall thermal resistance and improves the heat dissipation efficiency. In addition, the insulating ring 31 is tightly connected to the bearing sleeve in the form of a dovetail groove, so that the inclined interlocking structure of the dovetail groove can increase the contact area between the insulating ring 31 and the bearing sleeve, significantly reducing the contact thermal resistance. The two ends are sealed with glue, which can completely fill the interface gaps and avoid the air layer from hindering heat conduction, further improving the heat dissipation efficiency and reducing grease aging or bearing metal fatigue.
[0025] When manufacturing this bearing sleeve, the user places the outer ring sleeve 2 on the mounting table and clamps the inner wall of the outer ring sleeve 2 using a clamping device. Then, the inner ring sleeve 1 is placed inside the outer ring sleeve 2, and the clamping device is used to hold the inner ring sleeve 1, ensuring that the inner ring sleeve 1 and the outer ring sleeve 2 are aligned on the same axis. At this point, there is a gap between the inner ring sleeve 1 and the outer ring sleeve 2. Liquid PPS resin is then poured into the gap between the inner ring sleeve 1 and the outer ring sleeve 2, filling the gap. When the liquid PPS resin solidifies, the user... The PPS resin solidified between the inner ring 1 and the outer ring 2 is polished to obtain the required insulation layer 3. The insulation layer 3 bonds the inner ring 1 and the outer ring 2 together, thereby improving the strength of the bearing sleeve mechanical structure composed of the insulation layer 3, the inner ring 1, and the outer ring 2. Since the insulation layer 3 is made of PPS resin, it has good insulation properties, high mechanical strength, excellent high temperature resistance, and good chemical corrosion resistance. This makes the insulation layer 3 made of PPS resin more stable in use and effectively extends its service life.
[0026] Before inserting the inner ring 1 into the outer ring 2, an insulating ring 31 is placed in the gap between the inner ring 1 and the outer ring 2, and glued to the insulating ring 31. At this time, the insulating ring 31 seals the gap between the inner ring 1 and the outer ring 2 near the mounting platform. Then, liquid PPS resin is poured into the gap between the inner ring 1 and the outer ring 2, so that the liquid PPS resin is stably filled in the gap between the inner ring 1 and the outer ring 2 under the support of the insulating ring 31. The insulating ring 31 is also made of PPS resin. Because the insulating ring 31 is shaped like a dovetail groove, the contact area between the insulating ring 31 and the inner ring 1 and the outer ring 2 is increased. The sealing effect of the insulating ring 31 in the gap between the inner ring sleeve 1 and the outer ring sleeve 2 is improved. After the PPS resin is filled, another insulating ring 31 is placed. After the PPS resin solidifies, the insulating ring 31 is also fixed to the solidified insulating layer 3. Because the inclined interlocking structure of the dovetail groove can increase the contact area between the insulating ring 31 and the bearing sleeve, it significantly reduces the contact thermal resistance. In addition, the structure of the insulating ring 31 and the insulating layer 3 can completely fill the interface gap between the inner ring sleeve 1 and the outer ring sleeve 2, avoiding the air layer from hindering heat conduction and further improving the heat dissipation efficiency. The positioning groove 12, the threaded hole 21 and the threaded groove 11 are used to connect the bearing sleeve to the motor frame.
[0027] The difference between Example 2 and Example 1 is as follows:
[0028] The inner ring sleeve 1 has a groove 13 on its inner wall; the outer ring sleeve 2 has a slot 22 on its inner wall that is directly opposite to the groove 13; the insulating layer 3 has a through groove 32 on its surface; and a positioning rod 4 is slidably and sealingly connected inside the groove 13.
[0029] In this embodiment, the positioning rod 4 includes a fixing rod 41 and an insulating cylinder 42; the insulating cylinder 42 is sleeved on one end of the fixing rod 41; the end of the fixing rod 41 sleeved on the insulating cylinder 42 is slidably and sealingly connected in the groove 13.
[0030] In this embodiment, the surface of the fixing rod 41 is provided with an annular groove 411; the inner wall of the insulating cylinder 42 is fixedly connected with a flange 421; the flange 421 is rotatably and sealingly connected in the annular groove 411.
[0031] During operation, to ensure the alignment of the inner ring 1 and the outer ring 2, this invention employs positioning rods 4. After the user places the inner ring 1 into the outer ring 2, the user inserts the positioning rods 4 into the groove 13 of the inner ring 1, allowing the positioning rods 4 to pass through the groove 13 and enter the slot 22 on the inner wall of the outer ring 2. Three positioning rods 4 are provided, circling the inner wall of the inner ring 1. When all three positioning rods 4 have completely passed through the groove 13 and entered the slot 22 on the inner wall of the outer ring 2, this... When the inner ring 1 and outer ring 2 are on the same horizontal plane and their axes are perfectly aligned, liquid PPS resin is then filled into the gap between them. The liquid PPS resin then encapsulates the positioning rod 4. After the liquid PPS resin solidifies, a through groove 32 is formed at the point where the positioning rod 4 is blocked. The positioning rod 4 is composed of a fixing rod 41 and an insulating cylinder 42. Furthermore, the fixing rod 41, inner ring 1, and outer ring 2 are all made of high-carbon chromium steel. The materials used in the construction of the fixing rod 41, inner ring 1, and outer ring 2, made of high-carbon chromium steel, give them high hardness, wear resistance, and fatigue strength. The fixing rod 41, used to connect the inner ring 1 and outer ring 2, further enhances the structural strength of the inner ring 1 and outer ring 2. The insulating cylinder 42, located within the groove 13 and made of PPS resin, prevents direct contact between the fixing rod 41 and the inner ring 1, thus blocking the current transmitted from the inner ring 1 to the fixing rod 41 and cutting off the shaft current, thereby insulating the bearing. The annular groove 411 on the surface of the fixing rod 41 is designed to allow the insulating cylinder 42 to be rotatably and sealingly connected to the annular groove 411 via the flange 421 on the inner wall. This increases the contact area between the insulating cylinder 42 and the fixing rod 41, ensuring a tight connection and preventing the insulating cylinder 42 from detaching after prolonged use. This significantly improves the practicality of this invention.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A novel bearing sleeve insulation structure, comprising a bearing sleeve and an insulation layer (3), characterized in that: The bearing sleeve includes an inner ring sleeve (1) and an outer ring sleeve (2); the inner ring sleeve (1) has a threaded groove (11) and a positioning groove (12) on its surface; the outer ring sleeve (2) has a threaded hole (21) on its surface; the insulating layer (3) is located between the inner ring sleeve (1) and the outer ring sleeve (2); both the inner ring sleeve (1) and the outer ring sleeve (2) are made of high carbon chromium steel; an insulating ring (31) is provided between the inner ring sleeve (1) and the outer ring sleeve (2); there are two insulating rings (31); the two insulating rings (31) are distributed at both ends of the insulating layer (3); the insulating rings (31) are fixed to the insulating layer (3), the inner ring sleeve (1) and the outer ring sleeve (2) by adhesive coating.
2. The novel bearing sleeve insulation structure according to claim 1, characterized in that: The cross-sectional shape of the insulating ring (31) is set to the shape of a dovetail groove.
3. The novel bearing sleeve insulation structure according to claim 2, characterized in that: The inner ring sleeve (1) has a groove (13) on its inner wall; the outer ring sleeve (2) has a slot (22) on its inner wall that is directly opposite to the groove (13); the insulating layer (3) has a through groove (32) on its surface; and a positioning rod (4) is slidably and sealed inside the groove (13).
4. The novel bearing sleeve insulation structure according to claim 3, characterized in that: The positioning rod (4) includes a fixing rod (41) and an insulating cylinder (42); the insulating cylinder (42) is sleeved on one end of the fixing rod (41); the end of the fixing rod (41) sleeved with the insulating cylinder (42) is slidably sealed in the groove (13).
5. A novel bearing sleeve insulation structure according to claim 4, characterized in that: The surface of the fixed rod (41) is provided with an annular groove (411); the inner wall of the insulating cylinder (42) is fixedly connected with a flange (421); the flange (421) is rotatably and sealingly connected in the annular groove (411).