Structure for preventing high-speed motor bearing from running out of outer ring
By using irregularly shaped bimetallic washers, the frictional force is increased by utilizing the difference in the thermal expansion coefficients of different materials, thus solving the problem of sliding wear on the outer ring of high-speed motor bearings and achieving the effects of preventing bearing outer ring slippage and simplifying assembly.
Patent Information
- Application Number
- CN202520707137.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-15
AI Technical Summary
In existing technologies, when high-speed motors operate at high speeds for extended periods, relative sliding can easily occur between the outer ring of the bearing and the bearing housing, leading to increased wear and noise, and making O-ring assembly difficult.
The bearing uses a non-circular bimetallic washer, which is made of an inner ring of negative thermal expansion metal and an outer ring of thermal expansion metal with different coefficients of thermal expansion. The groove is set in the bearing housing by taking advantage of the difference in the coefficients of thermal expansion of the different materials to increase friction and prevent the outer ring of the bearing from running away.
It effectively prevents the bearing outer ring from running out, reduces wear and noise, simplifies the assembly process, and avoids the difficulties of O-ring assembly.
Smart Images
Figure CN223975439U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a structure for preventing the outer ring of a high-speed motor bearing from slipping. Background Technology
[0002] Bearings are an indispensable support structure for ensuring the stable operation of rotating motors, and their failures are among the most common failures of rotating motors. Bearing slippage is one of the more common bearing failures.
[0003] For high-speed rotating motors, during long-term high-speed operation, the increase in bearing temperature leads to an increase in the clearance between the bearing outer ring and the bearing housing. This results in relative sliding between the bearing outer ring and the bearing housing, which is known as bearing outer ring slippage. This increases the wear of the bearing housing and the bearing outer ring, thereby increasing the risk of failures such as vibration, noise, and abnormal temperature.
[0004] In the existing technology, the solution to bearing outer ring slippage is usually to use a specially structured bearing, that is, to design a groove structure on the bearing outer ring and assemble a suitable O-ring, thereby increasing the friction between the bearing outer ring and the bearing housing, and thus preventing the bearing outer ring from slipping.
[0005] However, the inventors of this application have discovered that the compression of the O-ring needs to be considered during the assembly process in this structure of the prior art, which can easily lead to abnormalities such as O-ring trimming, thereby increasing the assembly difficulty. Utility Model Content
[0006] The purpose of this invention is to provide a structure to prevent the outer ring of a high-speed motor bearing from slipping, thereby solving the technical problem in the prior art where relative sliding easily occurs between the outer ring of the bearing and the bearing housing during the operation of a high-speed motor.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A structure for preventing the outer ring of a high-speed motor bearing from slipping, comprising: an end cover bearing housing, a pre-reserved groove in the bearing housing, a shaped bimetallic washer, and a bearing;
[0009] The irregular bimetallic gasket is formed by pressing together a negative thermal expansion metal inner ring and a thermal expansion metal outer ring.
[0010] The end cover bearing housing is provided with a bearing housing reserved groove, the bearing is assembled with the end cover bearing housing, and the irregular bimetallic washer is assembled in the bearing housing reserved groove of the end cover bearing housing.
[0011] In practical applications, when the irregular bimetallic washer is heated and deformed, the inner ring of the negative thermal expansion metal and the outer ring of the thermal expansion metal have different coefficients of thermal expansion, resulting in different deformations. This causes the protruding part of the irregular bimetallic washer to shrink inward and lock the outer ring of the bearing.
[0012] Compared with existing technologies, the structure for preventing high-speed motor bearings from slipping off the outer ring described in this utility model has the following advantages:
[0013] The structure provided by this utility model for preventing the outer ring of a high-speed motor bearing from slipping out of its outer ring employs a shaped bimetallic washer made of materials with different coefficients of thermal expansion. A matching groove is provided in the bearing housing. By utilizing the different degrees of deformation of the different thermally expanding materials at the same temperature, the friction between the outer ring of the bearing and the bearing housing is effectively increased, thus achieving the purpose of preventing the outer ring from slipping out of the bearing. Furthermore, the shaped bimetallic washer can be easily installed by simply placing it into the pre-reserved groove in the bearing housing, effectively avoiding the assembly difficulties caused by considering compression deformation during O-ring assembly. Attached Figure Description
[0014] Figure 1 A cross-sectional exploded structural diagram of a structure for preventing the outer ring of a high-speed motor bearing from slipping, provided in an embodiment of this utility model.
[0015] Figure 2 This is a schematic diagram of the irregular bimetallic washer in the structure for preventing the outer ring of a high-speed motor bearing from slipping, provided in an embodiment of this utility model.
[0016] Figure label:
[0017] 1-End cover bearing housing; 2-Bearing; 3-Bearing housing reserved groove; 4-Irregular bimetallic washer; 41-Negative thermal expansion metal inner ring; 42-Temperature expansion metal outer ring. Detailed Implementation
[0018] For ease of understanding, the structure for preventing the outer ring of a high-speed motor bearing from slipping, as provided in the embodiments of this utility model, will be described in detail below with reference to the accompanying drawings.
[0019] This utility model embodiment provides a structure to prevent the outer ring of a high-speed motor bearing from slipping, such as... Figure 1 and Figure 2 As shown, it includes: end cap bearing chamber 1, bearing chamber reserved groove 3, irregular bimetallic washer 4, and bearing 2;
[0020] The irregular bimetallic washer 4 is formed by pressing together a negative thermal expansion metal inner ring 41 and a thermal expansion metal outer ring 42.
[0021] The end cover bearing chamber 1 is provided with a bearing chamber reserved groove 3. The bearing 2 is assembled with the end cover bearing chamber 1, and the irregular bimetallic washer 4 is assembled in the bearing chamber reserved groove 3 of the end cover bearing chamber 1.
[0022] Compared with the prior art, the structure for preventing the outer ring of a high-speed motor bearing from slipping as described in this embodiment of the invention has the following advantages:
[0023] The structure provided in this embodiment for preventing the outer ring of a high-speed motor bearing from slipping out of its outer ring uses a shaped bimetallic washer made of materials with different coefficients of thermal expansion. A matching groove is provided in the bearing housing. By utilizing the different degrees of deformation of the different thermally expanding materials at the same temperature, the friction between the outer ring of the bearing and the bearing housing is effectively increased, thus achieving the purpose of preventing the outer ring from slipping out of the bearing. Furthermore, the shaped bimetallic washer can be easily assembled by simply placing it into the pre-reserved groove in the bearing housing, effectively avoiding the assembly difficulties caused by considering compression deformation during O-ring assembly.
[0024] In practical applications, such as Figure 1 and Figure 2 As shown, when the motor is running at high speed, the temperature of the bearing 2 rises under high-speed operation, and the irregular bimetallic washer 4 deforms due to heat. Because the coefficients of thermal expansion of the negative thermal expansion metal inner ring 41 and the thermal expansion metal outer ring 42 are different, different deformations occur, so that the protruding part of the irregular bimetallic washer 4 contracts inward and locks the outer ring of the bearing 2 while increasing the friction force, thereby effectively preventing the phenomenon of the bearing 2 running out of the outer ring.
[0025] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A structure for preventing a high-speed motor bearing from running out of a race, characterized by, Comprise: End cover bearing chamber, bearing chamber reserved slot, special-shaped bimetallic washer, and bearing; The special-shaped bimetallic washer is formed by pressing a negative thermal expansion metal inner ring and a thermal expansion metal outer ring; The end cover bearing chamber is provided with the bearing chamber reserved slot, the bearing is assembled with the end cover bearing chamber, and the special-shaped bimetallic washer is assembled in the bearing chamber reserved slot of the end cover bearing chamber.
2. The structure for preventing the outer ring run-out of a high-speed motor bearing according to claim 1, characterized by When the special-shaped bimetallic washer is deformed by heat, the thermal expansion coefficients of the negative thermal expansion metal inner ring and the thermal expansion metal outer ring are different, different deformations are generated, the convex part of the special-shaped bimetallic washer is inwardly contracted, and the outer ring of the bearing is locked.