CN215528789U

CN215528789U - Compact rotor dynamic balance structure of small motor

Info

Publication number: CN215528789U
Application number: CN202122065154.7U
Authority: CN
Inventors: 郭淑玲; 姜辉; 靳飞; 阴天龙; 李铁良
Original assignee: Dalian Riqian Motor Co ltd
Current assignee: Dalian Riqian Motor Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-01-14
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a compact rotor dynamic balance structure of a small motor, which comprises a dynamic balance disc and a bearing, wherein the dynamic balance disc and the bearing are sleeved on a rotating shaft, an end cover is sleeved on an outer ring of the bearing, the inner side of the end cover is connected with an inner bearing cover, the outer side of the end cover is connected with an outer bearing cover, and lubricating cavities are formed between the inner bearing cover and the bearing and between the outer bearing cover and the bearing; the end part of the dynamic balance disc is provided with an adjusting bulge extending to the groove of the bearing inner cover, the adjusting bulge is provided with a mounting groove, and the balance block is fixed in the mounting groove through a set screw. This application combines into a part with dynamic balance dish and interior tight circle and uses, and the structural component quantity of motor reduces, and the motor fault point reduces, and not only axial space saves, and the radial balance dish size reduces, and in the embedded bearing inner cup of dynamic balance dish, the dynamic balance requirement of motor and the labyrinth seal requirement of bearing room can be satisfied simultaneously.

Description

Compact rotor dynamic balance structure of small motor

Technical Field

The utility model relates to the field of equipment manufacturing, in particular to a compact rotor dynamic balance structure of a small motor.

Background

The motor installation space that general railway locomotive used all is less, consequently requires motor compact structure, and space utilization is high, and especially the fan motor who is used for driving locomotive resistance grid need install inside the fan, so structural requirement is stricter, for the requirement that satisfies the fan motor installation, needs to dwindle the structure of motor as far as possible, otherwise is difficult to get into installation space, and current fan motor overall structure is not compact, and occupation space is big.

SUMMERY OF THE UTILITY MODEL

The dynamic balance structure of the motor is effectively combined with the lubricating structure of the bearing, the space length of the motor is shortened, the number of structural parts of the motor is reduced, and the failure rate of the motor is reduced.

In order to achieve the purpose, the technical scheme of the application is as follows: the compact rotor dynamic balance structure of the small-sized motor comprises a dynamic balance disc and a bearing which are sleeved on a rotating shaft, wherein an end cover is sleeved on an outer ring of the bearing, the inner side of the end cover is connected with an inner bearing cover, the outer side of the end cover is connected with an outer bearing cover, and lubricating cavities are formed between the inner bearing cover and the bearing and between the outer bearing cover and the bearing; the end part of the dynamic balance disc is provided with an adjusting bulge extending to the groove of the bearing inner cover, the adjusting bulge is provided with a mounting groove, and the balance block is fixed in the mounting groove through a set screw.

Furthermore, when the balance block and the set screw are positioned in the mounting groove, the balance block and the set screw do not exceed the end surface of the adjusting protrusion.

Furthermore, an irregular shape is arranged between the dynamic balance disc and the bearing inner cover

The gap is lubricated.

Further, when the motor is assembled, the dynamic balance disc is used as an inner tight ring of the bearing chamber structure and is embedded in the groove of the bearing inner cover to form a labyrinth type bearing sealing structure together with the bearing, the bearing outer cover and the end cover.

Due to the adoption of the technical scheme, the utility model can obtain the following technical effects: the application provides a modified dynamic balance structure, the utilization ratio is higher in the space, and the regulation arch of dynamic balance dish is embedded in bearing inner cup lateral wall recess, at first uses as the balance dish, and it is equipped with the balancing piece mounting groove, can fix firmly with the balancing piece with holding screw, satisfies the experimental requirement of dynamic balance, and secondly, the dynamic balance dish can constitute complete labyrinth seal structure with all the other parts of bearing room, guarantees the lubrication and the sealing of bearing. Compared with the traditional balance and seal separation structure, the improved structure is more suitable for the small motor for the locomotive with compact space structure and strict installation space requirement, the number of structural components is reduced, and the failure point of the motor is reduced.

Drawings

FIG. 1 is a semi-sectional view of a compact rotor dynamic balance structure of a small motor;

FIG. 2 is a cross-sectional assembly view of the dynamic balancing disk;

FIG. 3 is an end view of the dynamic balancing disk;

the sequence numbers in the figures illustrate: 1. a dynamic balance disc; 2. an inner bearing cover; 3. a bearing; 4. a bearing outer cover; 5. an end cap; 6. a counterbalance; 7. tightening the screw; 8. an adjusting projection; 9. and (4) mounting the groove.

Detailed Description

The embodiments of the present invention are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

The embodiment provides a compact rotor dynamic balance structure of a small motor, which is shown in fig. 1-3 and specifically described as follows:

fig. 2-3 are structural diagrams of a dynamic balance disc of the motor, when a motor rotor is subjected to an integral dynamic balance test, a proper amount of balance blocks (6) are arranged on the dynamic balance disc (1) and are fixed by using set screws (7) so as to ensure that the rotor meets the dynamic balance requirement.

After the motor rotor dynamic balance test is qualified, the dynamic balance disc is used as an inner tight ring of a bearing chamber, as shown in fig. 1, at this time, a balance block (6) and a set screw (7) are required not to exceed the end part of an adjusting bulge of the balance disc, otherwise, the rotor rubs with an inner bearing cover (2) during rotation, and a bearing (3) generates heat, so that the use of the motor is influenced. The radial dimension of the traditional dynamic balance disc is equivalent to that of the bearing inner cover, and the dynamic balance disc is reduced in radial dimension through the structure.

As shown in figure 1, the bearing sealing structure and a dynamic balance disc (1) embedded in a groove of a bearing inner cover (2) form a typical labyrinth sealing structure together, the space is saved in the axial direction and the radial direction, the reliability of dynamic balance is guaranteed, and the completeness of labyrinth sealing of the bearing is guaranteed.

This modified dynamic balance structure structurally unites two into one dynamic balance dish and interior tightring, but its effect of exerting is divided into two, does not reduce motor structure's reliability, need pay attention to the installation order during the installation, and the assembly of bearing chamber portion can be carried out to the qualified rear of dynamic balance, at first installation bearing inner cup (2), bearing (3), then installation end cover (5), carries out the axle head to bearing (3) and fixes the back, installs bearing enclosing cover (4) at last. Compared with a traditional separated structure, the structural type that the dynamic balance disc and the inner tight ring are combined is reduced in the number of structural parts of the motor, the number of motor fault points is reduced, and the motor has more advantages in the narrow motor, so that the dynamic balance disc and the inner tight ring have wider application space in the structural design of a locomotive motor or a fan motor.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The compact rotor dynamic balance structure of the small-sized motor comprises a dynamic balance disc and a bearing which are sleeved on a rotating shaft, wherein an end cover is sleeved on an outer ring of the bearing, the inner side of the end cover is connected with an inner bearing cover, the outer side of the end cover is connected with an outer bearing cover, and lubricating cavities are formed between the inner bearing cover and the bearing and between the outer bearing cover and the bearing; the dynamic balance disc is characterized in that the end part of the dynamic balance disc is provided with an adjusting bulge extending to the groove of the bearing inner cover, the adjusting bulge is provided with a mounting groove, and the balance block is fixed in the mounting groove through a set screw.

2. The compact rotor dynamic balance structure of small motor as claimed in claim 1, wherein the balance weight and the set screw are located in the mounting groove without exceeding the end surface of the adjusting protrusion.

3. The compact rotor dynamic balance structure of small motor as claimed in claim 1, wherein an irregular shape is provided between the dynamic balance disc and the inner bearing cover

The gap is lubricated.

4. The compact rotor dynamic balance structure of small motor as claimed in claim 1, wherein the dynamic balance disk is used as an inner tight ring of the bearing chamber structure, embedded in the groove of the bearing inner cover, and forms a labyrinth type bearing sealing structure together with the bearing, the bearing outer cover and the end cover when the motor is assembled.