Oil leakage prevention structure of vertical motor bearing
By setting oil return holes and oil filling holes on the back cover and front cover of the vertical motor bearing, and using oil guide pipes to export lubricant, the problem of lubricant leakage is solved, and the effective collection of lubricant and the convenience of oil filling are achieved.
Patent Information
- Application Number
- CN202323385585.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-11
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2033-12-11
AI Technical Summary
The lubricant in the vertical motor bearing down and leaks due to gravity, contaminating the rotor coil and surrounding equipment.
A vertical motor bearing anti-leakage structure is designed. By installing the rear bearing gland and the end cover at the bottom of the bearing position of the rear cover and the front cover, there are respectively provided shaft end bearing oil return holes and shaft extension bearing oil return holes. , and install an oil guide pipe in each oil return hole to lead out lubricant to avoid leakage. At the same time, an oil filling hole is provided at the upper end of the bearing position for oil filling.
It effectively avoids the lubricant flowing out of the bearing from contaminating peripheral equipment and the environment. It also improves the convenience of lubricant filling and ensures that the motor operates in good working conditions.
Smart Images
Figure CN222381437U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a vertical motor bearing oil leakage prevention structure. Background Art
[0002] The motor is the main power source of the equipment, and it achieves work by outputting torque. There are two main ways to install motors: horizontal installation and vertical installation. Vertically installed motors usually adopt vertical motors, and their bearings mainly adopt the support form of a combination of axial force bearings and radial bearings, which can support the rotor in the vertical direction, while ensuring the operation accuracy and improving the service life of the motor. Since the motor runs continuously at a high speed, the bearing lubrication must be ensured during use to ensure that the motor runs in good working conditions. However, the lubricant in the vertical motor bearing will fall due to gravity, especially after the bearing heats up, the fall-off is more serious. The lubricant in the top bearing will flow to the rotor end and contaminate the rotor coil, while the lubricant in the bottom bearing will flow directly downward and contaminate the surrounding equipment and environment. In view of this, a vertical motor bearing oil leakage prevention structure is proposed. Summary of the invention
[0003] The technical problem to be solved by the utility model is to solve the problem that the lubricant in the vertical motor bearing flows downward and leaks out due to gravity.
[0004] The utility model solves the technical problem by adopting the following technical solution: a vertical motor bearing anti-leakage structure, comprising a motor housing, a rear cover installed at the rear end thereof, and a front cover installed at the front end thereof, the rear cover and the front cover are respectively provided with bearing positions, a rear bearing pressure cover for blocking the outer ring of the bearing is installed at the bottom end of the bearing position of the rear cover, the rear bearing pressure cover can be sealingly slidably sleeved on the outside of the motor rotor shaft, a shaft end bearing oil return hole is respectively opened on the side wall of the rear bearing pressure cover and the motor housing, one end of which can extend to the rolling element side end of the bearing where the bearing position is located, and the other end extends to the outside of the motor housing;
[0005] An end cover is installed at the bottom end of the bearing position of the front cover, and the end cover is slidably sealed and sleeved on the rotor shaft to form a cavity connected with the bearing position, and an oil return hole for the shaft extension bearing is opened at the bottom of the end cover;
[0006] Wherein, oil guide pipes are respectively installed in the oil return hole of the shaft end bearing and the oil return hole of the shaft extension bearing, and extend to the outside of the motor housing.
[0007] Preferably, a shaft end bearing oil filling hole is opened on the side wall of the rear cover, one end of which extends to the top of the rear cover bearing position, and the other end extends to the outside of the rear cover;
[0008] A front bearing gland is installed on the top of the front cover bearing position, which can be sealed and slidably sleeved on the outside of the motor rotor shaft, and a shaft extension bearing oil filling hole is respectively opened on the side wall of the front bearing gland and the side wall of the front cover, one end of which can extend to the rolling element side end of the bearing where the bearing position is located, and the other end extends to the outside of the front cover;
[0009] Wherein, oil guide pipes are respectively installed in the oil filling hole of the shaft end bearing and the oil filling hole of the shaft extension bearing and extend to the outside of the motor housing.
[0010] Preferably, a sealing ring is installed between the rear bearing cover and the motor rotor shaft and between the end cover and the motor rotor shaft.
[0011] Preferably, an oil storage tank is provided at the top of the gland bearing seat.
[0012] Preferably, the oil guide pipe is sealingly connected to the oil return hole of the shaft end bearing and the oil return hole of the shaft extension bearing.
[0013] Preferably, the oil guide tube is a nitrile oil-resistant rubber tube, and a clamping head structure protruding from the tube wall is provided at the front end, which can be clamped at the edge of the matching hole.
[0014] Preferably, a fan cover is installed on the rear cover, and the fan cover is provided with a through hole structure corresponding to the oil filling hole of the shaft end bearing.
[0015] The beneficial effect of the utility model is that the utility model is respectively provided with oil return holes at the lower ends of the bearing positions of the bearings at both ends of the motor rotor and an oil guide pipe is installed in each oil return hole. The lubricant flowing downward from the bearing can be led out of the motor through the oil guide pipe and can be collected uniformly, thereby preventing the lubricant flowing out of the bearing from polluting the surrounding equipment and the environment.
[0016] In addition, oil filling holes are respectively arranged at the upper ends of the bearing positions of the bearings at both ends of the motor rotor. Similarly, an oil guide pipe is installed in each oil filling hole. The oil guide pipe can be used to fill oil on the outside of the motor, thereby improving the convenience of oil filling. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a three-dimensional structural schematic diagram of the motor provided by the embodiment of the utility model;
[0019] Figure 2It is a schematic diagram of the overall cross-sectional structure of the motor provided in the embodiment of the utility model;
[0020] Figure 3 yes Figure 2 A schematic diagram of the structure after the oil return hole and the oil filling hole are inserted with the oil guide pipe;
[0021] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;
[0022] Figure 5 yes Figure 3 A schematic diagram of the enlarged structure at B in the middle;
[0023] In the figure: 1-motor housing, 2-rear cover, 2.1-rear bearing pressure cover, 2.2-oil storage tank, 3-front cover, 3.1-front bearing pressure cover, 4-end cover, 5-fan cover, 6-shaft end bearing, 7-shaft extension bearing, 8-oil guide pipe, 9-sealing ring, a-shaft end bearing oil return hole, b-shaft end bearing oil filling hole, c-shaft extension bearing oil return hole, d-shaft extension bearing oil filling hole. DETAILED DESCRIPTION
[0024] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the utility model rather than to limit the scope of the utility model. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.
[0025] In a specific embodiment, a vertical motor bearing anti-leakage structure is provided, which is the same as the existing structure in that it includes a motor housing 1, a rear cover 2 installed at its rear end, and a front cover 3 installed at its front end. The rear cover 2 and the front cover 3 are respectively provided with bearing positions, and bearings are installed inside them to support the rotor shaft. In addition, in order to achieve axial positioning of the rotor shaft, a rear bearing pressure cover 2.1 for blocking the outer ring of the bearing is installed at the bottom end of the bearing position of the rear cover 2.
[0026] In this example, a shaft end bearing is installed in the bearing position of the rear cover. The shaft end bearing is two angular contact ball bearings arranged in series, whose inner rings are fixed to the rotor shaft axially and circumferentially, and the outer rings are axially positioned with the rear bearing pressure cover 2.1. Therefore, the axial lifting and positioning of the rotor shaft is achieved according to the installation method of the angular contact ball in the prior art. In addition, a shaft extension bearing 7 is installed in the bearing position of the front cover 3. The shaft extension bearing 7 uses a deep groove ball bearing to position the shaft extension end of the rotor shaft, wherein the axial positioning of the inner ring of the bearing is achieved by the shaft extension step and the axial positioning round nut, and the axial positioning of the outer ring of the bearing is achieved by the bearing position and the pressure cover on the top. Therefore, according to the fixing method of the inner and outer rings of the bearing, an empty space can be left at the side end of the bearing rolling element. Therefore, this example uses this space to recover the lubricant to prevent it from leaking out. The specific structure is as follows:
[0027] After installation, the rear bearing gland 2.1 can be sealed and slidably sleeved on the outside of the motor rotor shaft, and the side wall of the rear bearing gland 2.1 and the motor housing 1 are respectively provided with a shaft end bearing oil return hole a, one end of which can extend to the rolling element side end of the bearing where the bearing seat is located, and the other end extends to the outside of the motor housing 1;
[0028] In addition, an end cover 4 is installed at the bottom end of the bearing position of the front cover 3. Similarly, the end cover 4 is slidably sealed and sleeved on the outside of the rotor shaft and forms a cavity connected with the bearing position. A shaft extension bearing oil return hole c is opened at the bottom of the end cover 4.
[0029] Specifically, a sealing ring 9 is installed on the matching surfaces of the rear bearing gland 2.1, the end cover 4 and the rotor shaft. Specifically, the sealing ring 9 can be a polytetrafluoroethylene sealing ring.
[0030] In order to realize the downward flow of lubricant and unified collection, oil guide pipes 8 are respectively installed in the oil return hole a of the shaft end bearing and the oil return hole c of the shaft extension bearing, and extend to the outside of the motor housing 1. Therefore, the lubricant is guided out by the oil guide pipe 8 to prevent the lubricant flowing out of the bearing from contaminating the surrounding equipment and the environment.
[0031] On this basis, since the bearing lubricant needs to be replenished regularly, in order to facilitate the injection of lubricant outside the motor, a shaft end bearing oil filling hole b is opened on the side wall of the rear cover 2, one end of which extends to the top of the shaft rear cover 2 bearing position, and the other end extends to the outside of the rear cover 2.
[0032] Similarly, the lower bearing is filled with lubricant. A front bearing pressure cover 3.1 is installed on the top of the bearing position of the front cover 3, which can be sealed and slidably sleeved on the outside of the motor rotor shaft. The side walls of the front bearing pressure cover 3.1 and the side walls of the front cover 3 are respectively provided with shaft extension bearing oil filling holes d, one end of which can extend to the rolling element side end of the bearing where the bearing position is located, and the other end extends to the outside of the front cover 3. In addition, oil guide pipes 8 are also installed in the shaft end bearing oil filling hole b and the shaft extension bearing oil filling hole d, respectively, extending to the outside of the motor housing 1. Therefore, the oil guide pipe 8 can be used to fill oil on the outside of the motor, thereby improving the convenience of oil filling. Among them, in order to realize the leakage-free guiding of the lubricant by the oil guide pipe 8, the oil guide pipe 8 is sealedly connected with the shaft end bearing oil return hole a and the shaft extension bearing oil return hole c. Specifically, one end of the oil guide pipe 8 can be screwed or tightly matched with the front end of the oil return hole a, for example, a sealing sleeve or a sealing gasket is sleeved on the oil guide pipe 8. Among them, in the present application, the oil guide tube 8 is preferably made of nitrile oil-resistant rubber, and a clamping head structure protruding from the tube wall is set at the front end. When in use, the elasticity of the oil guide tube 8 is used to achieve a sealing match with the hole, and the clamping head structure can be clamped at the edge of the matching hole to achieve the positioning of the oil guide tube 8 and avoid the movement of the oil guide tube caused by the vibration of the motor. Therefore, the use of elastic matching can make better use of the loading and unloading of the oil guide tube.
[0033] In order to increase the oil storage capacity of the lubricant of the shaft end bearing 6 and reduce the filling frequency, an oil storage tank 2.2 is provided at the top of the bearing position of the gland 2.1. A large amount of lubricant can be added therein at one time. It should be noted that the lubricant added here is grease.
[0034] In addition, a fan cover 5 is installed on the rear cover 2. In order to realize the straight-line outlet of the oil guide pipe 8, a through-hole structure is opened in the fan cover 5 corresponding to the oil filling hole b of the shaft end bearing.
[0035] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the invention through the above description. The technical scope of the invention is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A vertical motor bearing oil leakage prevention structure, comprising a motor housing (1), a rear cover (2) mounted at the rear end thereof, and a front cover (3) mounted at the front end thereof, wherein the rear cover (2) and the front cover (3) are respectively provided with bearing seats, and a rear bearing pressure cover (2.1) for blocking the outer ring of the bearing is mounted at the bottom end of the bearing seat of the rear cover (2), characterized in that: The rear bearing cover (2.1) can be sealingly slidably sleeved on the outside of the motor rotor shaft, and a shaft end bearing oil return hole (a) is respectively provided on the side wall of the rear bearing cover (2.1) and the motor housing (1), one end of which can extend to the side end of the rolling element of the bearing where the bearing seat is located, and the other end extends to the outside of the motor housing (1); An end cover (4) is installed at the bottom end of the bearing position of the front cover (3), and the end cover (4) is slidably and sealingly sleeved on the rotor shaft and forms a cavity connected with the bearing position, and a shaft extension bearing oil return hole (c) is opened at the bottom of the end cover (4); Wherein, oil guide pipes (8) are respectively installed in the shaft end bearing oil return hole (a) and the shaft extension bearing oil return hole (c), and extend to the outside of the motor housing (1).
2. The vertical motor bearing oil leakage prevention structure according to claim 1, characterized in that: A shaft end bearing oil filling hole (b) is provided on the side wall of the rear cover (2), one end of which extends to the top of the bearing position of the rear cover (2), and the other end of which extends to the outside of the rear cover (2); A front bearing cover (3.1) is installed on the top of the bearing position of the front cover (3), and can be slidably sleeved on the outside of the motor rotor shaft in a sealing manner. A shaft extension bearing oil filling hole (d) is respectively opened on the side wall of the front bearing cover (3.1) and the side wall of the front cover (3), one end of which can extend to the rolling element side end of the bearing where the bearing position is located, and the other end extends to the outside of the front cover (3); Wherein, oil guide pipes (8) are respectively installed in the shaft end bearing oil filling hole (b) and the shaft extension bearing oil filling hole (d) and extend to the outside of the motor housing (1).
3. The vertical motor bearing oil leakage prevention structure according to claim 1, characterized in that: A sealing ring (9) is installed between the rear bearing pressure cover (2.1) and the motor rotor shaft, and between the end cover (4) and the motor rotor shaft.
4. The vertical motor bearing oil leakage prevention structure according to claim 1, characterized in that: An oil storage tank (2.2) is provided at the top end of the bearing position of the gland (2.1).
5. The vertical motor bearing oil leakage prevention structure according to claim 1, characterized in that: The oil guide pipe (8) is sealedly connected to the oil return hole (a) of the shaft end bearing and the oil return hole (c) of the shaft extension bearing.
6. The vertical motor bearing oil leakage prevention structure according to claim 1, characterized in that: The oil guide tube (8) is a nitrile oil-resistant rubber tube, and a clamping head structure protruding from the tube wall is provided at the front end, which can be clamped at the edge of the matching hole.
7. A vertical motor bearing oil leakage prevention structure as claimed in claim 1, characterized in that: A fan cover (5) is mounted on the rear cover (2), and a through hole structure is provided in the fan cover (5) corresponding to the oil filling hole (b) of the shaft end bearing.