CN219740095U - Motor capable of preventing shaft current from being generated - Google Patents

Motor capable of preventing shaft current from being generated Download PDF

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Publication number
CN219740095U
CN219740095U CN202321235943.3U CN202321235943U CN219740095U CN 219740095 U CN219740095 U CN 219740095U CN 202321235943 U CN202321235943 U CN 202321235943U CN 219740095 U CN219740095 U CN 219740095U
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China
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bearing
cover
end cover
rear end
nylon
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CN202321235943.3U
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Chinese (zh)
Inventor
彭利生
邵晓强
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Xi'an Servo Motor Co ltd
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Xi'an Servo Motor Co ltd
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Abstract

The utility model discloses a motor for preventing shaft current from generating, which comprises a front end cover, a rear end cover and a rotor, wherein the rotor comprises a rotating shaft, a front bearing and a rear bearing, the front end of the rotating shaft is sleeved with the front bearing, the rear end of the rotating shaft is sleeved with the rear bearing, the inner side of the front end cover is provided with a bearing chamber for accommodating the front bearing, the front bearing is nested in the bearing chamber of the front end cover, the inner side of the rear end cover is provided with a bearing chamber for accommodating the rear bearing, the rear bearing is nested in the bearing chamber of the rear end cover, a front end cover nylon cover is sleeved between the front end cover and the front bearing, and a rear end cover nylon cover is sleeved between the rear end cover and the rear bearing. The utility model not only effectively solves the problem of shaft current generation, but also prolongs the service life of the motor and reduces the production cost.

Description

Motor capable of preventing shaft current from being generated
Technical Field
The utility model belongs to the technical field of motors, and particularly relates to a motor for preventing shaft current from being generated.
Background
According to the structure and the working principle of the synchronous generator, because of the joint of the stator core combination and the stator silicon steel sheet, the air gap between the stator and the rotor is uneven, the shaft center is inconsistent with the magnetic field center, and the like, the main shaft of the unit inevitably rotates in an incompletely symmetrical magnetic field. Thus, an ac voltage is generated across the shaft.
The traditional prevention of shaft current generation is achieved by the following technical schemes:
in the scheme 1, one side of the carbon brush is contacted with the shaft, the other side of the carbon brush is grounded, and the electricity is led into the ground, so that the shaft voltage can be effectively prevented. However, scheme 1 suffers from the following drawbacks: lubricating oil can be caused to deteriorate in the motor, breakdown voltage of oil is reduced, and meanwhile, carbon dust can cause risk of short circuit of electronic components in the motor.
Scheme 2, conducting ring scheme-similar to carbon brush scheme, namely one side is contacted with the axle, the other end is installed on the shell (grounding), and the electricity can be led into the ground to effectively prevent the axle voltage. Scheme 2 has the following drawbacks: the cost is higher, and the shell and the shaft are matched for adjustment. Meanwhile, the effect in the oil-cooled motor is unstable, and because the lubricating oil insulation characteristic can play a certain insulation role under the high-speed operation condition, the problem of electric corrosion under the high-speed operation condition can still exist.
Scheme 3, conductive grease bearing scheme-with ordinary bearing size accomplish the same, but inside grease has increased grease conductivity and anti electric corrosion on the basis of satisfying high temperature resistance and low temperature mobility, can prolong the life of bearing, simultaneously for conventional bearing, conductive grease bearing's conductive performance is better. Scheme 3 has the following drawbacks: the effect of the conductive grease bearing improvement scheme is not stable, and the effect of improving the shaft voltage is not obvious before a grease film is not effectively formed under the cold condition.
Disclosure of Invention
The utility model aims to: in order to solve the defects in the prior art, the utility model provides the motor for preventing the shaft current from being generated, which not only effectively solves the problem of the generation of the shaft current, but also prolongs the service life of the motor and reduces the production cost.
The technical scheme is as follows: the utility model provides a prevent motor that shaft current produced, includes front end housing, rear end cap and rotor, the rotor includes pivot, front bearing and rear bearing, the front end housing of pivot is equipped with front bearing, the rear end housing of pivot is equipped with rear bearing, the inboard of front end housing is equipped with and holds the bearing room of front bearing, front bearing nest in the bearing room of front end housing, the inboard of rear end cap is equipped with the bearing room that holds rear bearing, rear bearing nest in the bearing room of rear end housing, wherein:
a front end cover nylon cover is sleeved between the front end cover and the front bearing, and a rear end cover nylon cover is sleeved between the rear end cover and the rear bearing.
Further, the outer circle of the front end cover nylon cover is tightly matched with the bearing chamber of the front end cover, and the outer circle of the front bearing is in clearance fit with the inner hole of the front end cover nylon cover.
Further, the outer circle of the rear end cover nylon cover is tightly matched with the bearing chamber of the rear end cover, and the outer circle of the rear bearing is in clearance fit with the inner hole of the rear end cover nylon cover.
Further, the motor rotor assembly further comprises at least two stator assembly parts, one end of each stator assembly part is connected with the front end cover through a screw, the other end of each stator assembly part is connected with the rear end cover through a screw, and the position of each stator assembly part is matched with the position of the rotor.
Further, a wave spring is arranged between the rotor and the nylon cover of the rear end cover.
Further, the front end cover nylon cover and the rear end cover nylon cover are all integrally formed parts formed by nylon injection molding.
Further, the outer circle of the nylon cover of the front end cover is symmetrically provided with a plurality of convex semi-cylinders, and the height of the semi-cylinders is 0.05-0.07 mm;
the outer circle of the nylon cover 4 at the rear end is symmetrically provided with a plurality of convex semi-cylinders, and the height of the semi-cylinders is 0.05-0.07 mm.
Further, the bearing width of the front bearing is C millimeters, the inner hole width of the bearing chamber of the front end cover is (C+2) millimeters, and the value range of C is more than or equal to 22 and less than or equal to 50.
Further, the front end cover nylon cover has a width of (C+2) mm.
Further, the bearing width of the rear bearing is C millimeters, the inner hole width of the bearing chamber of the rear end cover is (C+3) millimeters, and the value range of C is more than or equal to 22 and less than or equal to 50.
Further, the width of the rear end cover nylon cover is (C+3) mm, and the width of the inner hole of the rear end cover nylon cover is (C+1) mm.
Compared with the prior art, the utility model has the beneficial effects that:
the front end cover nylon cover is sleeved between the front end cover and the front bearing, and the rear end cover nylon cover is sleeved between the rear end cover and the rear bearing, so that the generation of shaft current is effectively solved, the service life of the motor is prolonged, and the production cost is reduced.
Drawings
Fig. 1 is a schematic diagram of a motor for preventing shaft current generation according to the present disclosure.
Fig. 2a is a front view of a front end cap nylon cover.
Fig. 2b is a side view of the front end cap nylon cover.
Fig. 2c is a partial enlarged view at G in fig. 2 a.
Fig. 3a is a front view of the rear end cap nylon cover.
Fig. 3b is a side view of the rear end cap nylon cover.
Fig. 3c is a partial enlarged view at H in fig. 3 a.
Fig. 4 is a schematic view of the front end cap.
Fig. 5 is a schematic view of the rear end cap.
Wherein:
1-front end cover 2-front end cover nylon cover
3-front bearing 4-rear end cap nylon cover
5-wave spring 6-rear bearing
7-rear end cap 8-rotor
9-stator assembly 10-screw
11-spindle
The specific embodiment is as follows:
the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, a motor for preventing shaft current from being generated comprises a front end cover 1, a rear end cover 7 and a rotor 8, wherein the rotor 8 comprises a rotating shaft 11, a front bearing 3 and a rear bearing 6, the front end of the rotating shaft 11 is sleeved with the front bearing 3, the rear end of the rotating shaft 11 is sleeved with the rear bearing 6, the inner side of the front end cover 1 is provided with a bearing chamber for accommodating the front bearing 3, the front bearing 3 is nested in the bearing chamber of the front end cover 1, the inner side of the rear end cover 7 is provided with a bearing chamber for accommodating the rear bearing 6, and the rear bearing 6 is nested in the bearing chamber of the rear end cover 7, wherein:
a front end cover nylon cover 2 is sleeved between the front end cover 1 and the front bearing 3, and a rear end cover nylon cover 4 is sleeved between the rear end cover 7 and the rear bearing 6.
Further, the outer circle of the front end cover nylon cover 2 is tightly matched with the bearing chamber of the front end cover 1, and the outer circle of the front bearing 3 is in clearance fit with the inner hole of the front end cover nylon cover 2.
Further, the outer circle of the rear end cover nylon cover 4 is tightly matched with the bearing chamber of the rear end cover 7, and the outer circle of the rear bearing 6 is in clearance fit with the inner hole of the rear end cover nylon cover 4.
Further, the motor rotor comprises at least two stator assembly parts 9, one end of each stator assembly part 9 is connected with the front end cover 1 through a screw 10, the other end of each stator assembly part 9 is connected with the rear end cover 7 through a screw 10, and the position of each stator assembly part 9 is matched with the position of the rotor 8.
Further, a wave spring 5 is further provided between the rotor 8 and the nylon cover 4 of the rear end cap.
Further, the front end cover nylon cover 2 and the rear end cover nylon cover 4 are all integrally formed parts formed by nylon injection molding.
Further, four raised semi-cylinders are symmetrically arranged on the outer circle of the nylon cover 2 of the front end cover, and the height of the front end cover is 0.05 millimeter;
the outer circle of the nylon cover 4 at the rear end is symmetrically provided with four raised semi-cylinders, and the height of the nylon cover is 0.05 millimeter.
Further, the bearing width of the front bearing 3 is C mm, and the inner hole width of the bearing chamber of the front end cover 1 is (c+2) mm, wherein the value of C is 22.
Further, the front end cover nylon cover 2 has a width of (c+2) mm.
Further, the bearing width of the rear bearing 6 is C mm, and the inner hole width of the bearing chamber of the rear end cover 7 is (c+3) mm, wherein the value of C is 22.
Further, the width of the rear end cover nylon cover 4 is (C+3) mm, and the width of the inner hole of the rear end cover nylon cover 4 is (C+1) mm.
In another embodiment, which is substantially the same as the above embodiment, the only difference is that:
1. the value of C is 50;
2. six raised semi-cylinders are symmetrically arranged on the outer circle of the nylon cover 2 of the front end cover, and the height of the six raised semi-cylinders is 0.07 millimeter;
six raised semi-cylinders are symmetrically arranged on the outer circle of the nylon cover 4 at the rear end, and the height of the six raised semi-cylinders is 0.07 millimeter.
In yet another embodiment, which is substantially the same as the above embodiment, the only difference is that:
1. the value of C is 30.
2. The outer circle of the nylon cover 2 of the front end cover is symmetrically provided with two convex semi-cylinders, and the height of the two semi-cylinders is 0.06 mm;
the outer circle of the nylon cover 4 at the rear end is symmetrically provided with two protruding semi-cylinders, and the height of the two protruding semi-cylinders is 0.06 millimeter.
The working principle and the using flow of the utility model are as follows:
when the novel nylon cover is used, the front end cover nylon cover 2 is pressed into the bearing hole of the front end cover 1 by a special tool, and the rear end cover nylon cover 4 is pressed into the bearing hole of the rear end cover 7 by a special tool;
the front bearing 3 and the rear bearing 6 are pressed into a rotating shaft 11 by special tools to form a rotor 8, and the rotor 8 is slid into an inner hole formed by a stator assembly 9;
the wave spring 5 is arranged in a bearing hole of the rear end cover 7, the front end cover 1 is slid into the outer circle of the front bearing 3, the rear end cover 7 is slid into the outer circle of the rear bearing 6, and after the screw 10 is arranged, the motor assembly is completed.
The embodiments of the present utility model have been described in detail. However, the present utility model is not limited to the above-described embodiments, and various modifications may be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims (10)

1. The utility model provides a prevent motor that shaft current produced, includes front end housing, rear end cap and rotor, the rotor includes pivot, front bearing and rear bearing, the front end housing of pivot is equipped with front bearing, the rear end housing of pivot is equipped with rear bearing, the inboard of front end housing is equipped with and holds the bearing room of front bearing, front bearing nest in the bearing room of front end housing, the inboard of rear end cap is equipped with the bearing room that holds rear bearing, rear bearing nest in the bearing room of rear end housing, its characterized in that:
a front end cover nylon cover is sleeved between the front end cover and the front bearing, and a rear end cover nylon cover is sleeved between the rear end cover and the rear bearing.
2. The motor for preventing shaft current from being generated according to claim 1, wherein the outer circle of the front end cover nylon cover is tightly matched with the bearing chamber of the front end cover, and the outer circle of the front bearing is in clearance fit with the inner hole of the front end cover nylon cover.
3. The motor for preventing shaft current from being generated according to claim 1, wherein the outer circle of the nylon cover of the rear end cover is tightly matched with the bearing chamber of the rear end cover, and the outer circle of the rear bearing is in clearance fit with the inner hole of the nylon cover of the rear end cover.
4. A motor for preventing shaft current generation according to claim 1, further comprising at least two stator assemblies, one end of the stator assembly being connected to the front end cover by means of screws, the other end of the stator assembly being connected to the rear end cover by means of screws, the position of the stator assembly being adapted to the position of the rotor.
5. A motor for preventing shaft current from being generated as defined in claim 1, further comprising a wave spring between said rotor and said rear cover nylon cover.
6. The motor of claim 1, wherein said front end cap nylon cover and said rear end cap nylon cover are each integrally molded from nylon.
7. The motor for preventing shaft current generation according to claim 1, wherein the outer circle of the nylon cover of the front end cover is symmetrically provided with a plurality of convex semi-cylinders, and the height of the semi-cylinders is 0.05-0.07 mm;
the outer circle of the nylon cover at the rear end is symmetrically provided with a plurality of raised semi-cylinders, and the height of the nylon cover is 0.05-0.07 mm.
8. The motor for preventing shaft current from being generated according to claim 1, wherein the bearing width of the front bearing is C mm, the inner hole width of the bearing chamber of the front end cover is (c+2) mm, and the value of C is 22.ltoreq.c.ltoreq.50.
9. A motor for preventing shaft current generation according to claim 8, wherein said front end cap nylon cover has a width of (c+2) mm.
10. The motor for preventing shaft current from being generated according to claim 1, wherein the bearing width of the rear bearing is C mm, the inner hole width of the bearing chamber of the rear end cover is (c+3) mm, the width of the nylon cover of the rear end cover is (c+3) mm, and the inner hole width of the nylon cover of the rear end cover is (c+1) mm, wherein the value of C is 22.ltoreq.c.ltoreq.50.
CN202321235943.3U 2023-05-22 2023-05-22 Motor capable of preventing shaft current from being generated Active CN219740095U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321235943.3U CN219740095U (en) 2023-05-22 2023-05-22 Motor capable of preventing shaft current from being generated

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321235943.3U CN219740095U (en) 2023-05-22 2023-05-22 Motor capable of preventing shaft current from being generated

Publications (1)

Publication Number Publication Date
CN219740095U true CN219740095U (en) 2023-09-22

Family

ID=88055542

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321235943.3U Active CN219740095U (en) 2023-05-22 2023-05-22 Motor capable of preventing shaft current from being generated

Country Status (1)

Country Link
CN (1) CN219740095U (en)

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