Insulating bearing sleeve structure of motor
The motor insulation bearing structure with interlocking insulation sleeves addresses the issue of axle currents by preventing electrical contact between steel sleeves, thus protecting the bearings from corrosion and noise.
Patent Information
- Application Number
- CN202422217280.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The motor bearings are electrically corroded due to shaft current, causing abnormal noise and damage, and the existing technology has not effectively solved it.
The first and second insulating sleeves are installed between the inner steel sleeve and the outer steel sleeve. The insulation sleeve is firmly connected through the design of the clamp slot and the clamp ring, preventing the inner and outer steel sleeves from contacting and avoiding current generation.
It effectively avoids current conduction between the inner and outer steel sleeves, protects the bearing from electrical corrosion, and extends the bearing life.
Smart Images
Figure CN223109780U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearing sleeves, in particular to a structure of an insulating bearing sleeve for an electric motor. Background Technique
[0002] In recent years, with the continuous increase of the power of electric motors, the rated voltage of electric motors has increased accordingly, and the problem of shaft voltage has become more and more prominent. The rotating shaft passes through the bearing and is grounded to the motor housing, forming a conductive loop, and the voltage difference between the rotating shaft and the ground will generate shaft current. The shaft current passes through the bearing, which will cause electrical corrosion to the bearing balls and raceways in the long term, and then the bearing makes abnormal noises and the bearing is damaged.
[0003] Therefore, it is necessary to provide a new structure of an insulating bearing sleeve for an electric motor to solve the above technical problems. Content of the Utility Model
[0004] The technical problem solved by the utility model is to provide a structure of an insulating bearing sleeve for an electric motor that can avoid generating shaft current and damaging the bearing.
[0005] To solve the above technical problem, the structure of the insulating bearing sleeve for an electric motor provided by the utility model includes: an inner steel sleeve and an outer steel sleeve, a first insulating sleeve and a second insulating sleeve are installed between the inner steel sleeve and the outer steel sleeve, and the connection parts of the first insulating sleeve and the second insulating sleeve are engaged with each other.
[0006] Preferably, the first insulating sleeve and the second insulating sleeve are perpendicular to each other, and both the first insulating sleeve and the second insulating sleeve are in a ring structure.
[0007] Preferably, a card slot is provided at the edge of the first insulating sleeve, one end of the second insulating sleeve is fixedly connected with a snap ring, and the snap ring is engaged with the inside of the card slot.
[0008] Preferably, the cross-section of one end of the snap ring and the card slot is circular, and the height of the snap ring is less than the thickness of the first insulating sleeve.
[0009] Compared with the related technology, the structure of the insulating bearing sleeve for an electric motor provided by the utility model has the following beneficial effects:
[0010] The utility model provides a structure of an insulating bearing sleeve for an electric motor. The first insulating sleeve and the second insulating sleeve are installed between the inner steel sleeve and the outer steel sleeve. At the connection part of the insulating sleeves, a card slot is provided at the edge of the first insulating sleeve, one end of the second insulating sleeve is fixedly connected with a snap ring, and the cross-section of one end of the snap ring and the card slot is circular. When the insulating sleeves are spliced, the snap ring is engaged with the inside of the card slot, so that the first insulating sleeve and the second insulating sleeve are firmly spliced together, and the first insulating sleeve and the second insulating sleeve prevent the inner steel sleeve and the outer steel sleeve from contacting, avoiding the generation of current between the inner steel sleeve and the outer steel sleeve, thereby damaging the bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 FIG. 1 is a schematic structural diagram of a preferred embodiment of the motor insulation bearing sleeve structure provided by the present utility model;
[0012] Figure 2 FIG. 2 Figure 1 is a schematic internal structure diagram of the inner steel sleeve shown in FIG. 1;
[0013] Figure 3 FIG. 3 Figure 1 is a front view of the internal structure of the inner steel sleeve shown in FIG. 2;
[0014] Figure 4 FIG. 4 Figure 2 is an exploded schematic diagram of the structures of the first insulation sleeve and the second insulation sleeve shown in FIG. 3;
[0015] Figure 5 FIG. 5 Figure 4 is an enlarged schematic diagram of the structure at position A shown in FIG. 4.
[0016] Reference numerals in the figures: 1, inner steel sleeve; 2, outer steel sleeve; 3, first insulation sleeve; 4, second insulation sleeve; 5, snap ring; 6, clamping groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The present utility model will be further described below with reference to the drawings and embodiments.
[0018] Please refer to Figures 1 to 5 , Figure 1 FIG. 1 is a schematic structural diagram of a preferred embodiment of the motor insulation bearing sleeve structure provided by the present utility model; Figure 2 FIG. 2 Figure 1 is a schematic internal structure diagram of the inner steel sleeve shown in FIG. 1; Figure 3 FIG. 3 Figure 1 is a front view of the internal structure of the inner steel sleeve shown in FIG. 2; Figure 4 FIG. 4 Figure 2 is an exploded schematic diagram of the structures of the first insulation sleeve and the second insulation sleeve shown in FIG. 3; Figure 5 FIG. 5 Figure 4 is an enlarged schematic diagram of the structure at position A shown in FIG. 4. The motor insulation bearing sleeve structure includes: an inner steel sleeve 1 and an outer steel sleeve 2. A first insulation sleeve 3 and a second insulation sleeve 4 are installed between the inner steel sleeve 1 and the outer steel sleeve 2. The connection parts of the first insulation sleeve 3 and the second insulation sleeve 4 are engaged with each other. The first insulation sleeve 3 and the second insulation sleeve 4 prevent the inner steel sleeve 1 from contacting the outer steel sleeve 2, avoiding the generation of current between the inner steel sleeve 1 and the outer steel sleeve 2 and thus damaging the bearing. The first insulation sleeve 3 and the second insulation sleeve 4 are made of epoxy glass cloth laminate, with a temperature resistance up to 180 °C and a low temperature resistance down to -50 °C. The insulation sleeve has a higher temperature resistance grade, avoiding damage to the insulation sleeve due to temperature reasons.
[0019] The first insulating sleeve 3 and the second insulating sleeve 4 are perpendicular to each other, and both the first insulating sleeve 3 and the second insulating sleeve 4 are in an annular structure. In order to facilitate the first insulating sleeve 3 and the second insulating sleeve 4 to separate the inner steel sleeve 1 and the outer steel sleeve 2 and prevent them from contacting each other.
[0020] A clamping groove 6 is provided at the edge of the first insulating sleeve 3. One end of the second insulating sleeve 4 is fixedly connected with a clamping ring 5, and the clamping ring 5 is clamped inside the clamping groove 6; and the height of the clamping ring 5 is less than the thickness of the first insulating sleeve 3. During the installation of the insulating sleeve, the clamping ring 5 is clamped inside the clamping groove 6. One cross-section of the clamping ring 5 and the clamping groove 6 is circular to prevent the clamping ring 5 from separating from the inside of the clamping groove 6, so that the first insulating sleeve 3 and the second insulating sleeve 4 are firmly together. Then, the first insulating sleeve 3 and the second insulating sleeve 4 are heated to 100 to 120 °C and then sleeved on the surface of the inner steel sleeve 1, and heat-insulated for more than 2 hours. After cooling and fixing, the outer steel sleeve 2 is heated to 120 to 150 °C and then sleeved on the outside of the first insulating sleeve 3 and the second insulating sleeve 4, and heat-insulated for more than 2 hours, and then naturally cooled.
[0021] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.
Claims
1. A motor insulating bearing sleeve structure, characterized in that, Including: An inner steel sleeve (1) and an outer steel sleeve (2), a first insulating sleeve (3) and a second insulating sleeve (4) are installed between the inner steel sleeve (1) and the outer steel sleeve (2), and the joints of the first insulating sleeve (3) and the second insulating sleeve (4) are engaged with each other.
2. The motor insulation bearing sleeve structure according to claim 1, characterized in that, The first insulating sleeve (3) and the second insulating sleeve (4) are perpendicular to each other, and both the first insulating sleeve (3) and the second insulating sleeve (4) are in an annular structure.
3. The motor insulation bearing sleeve structure according to claim 2, characterized in that, A clamping groove (6) is provided at the edge of the first insulating sleeve (3), one end of the second insulating sleeve (4) is fixedly connected with a clamping ring (5), and the clamping ring (5) is engaged with the inside of the clamping groove (6).
4. The motor insulation bearing sleeve structure according to claim 3, characterized in that, The cross-section of one end of the clamping ring (5) and the clamping groove (6) is circular, and the height of the clamping ring (5) is less than the thickness of the first insulating sleeve (3).