CN214490429U - High-speed motor bearing drawing device - Google Patents

Abstract

The utility model discloses a high-speed motor bearing drawing device, which comprises a fixed part, a movable part and a drawing claw component; the fixing part is used for abutting against the motor rotating shaft; the moving part is movably connected with the fixed part and can move relative to the fixed part along the axial direction of the rotating shaft of the motor; draw the claw subassembly including drawing the dish and draw the claw, draw the dish and can follow motor shaft axial displacement under the drive of removal portion, draw claw rotatable coupling on drawing the dish, and draw the claw along the axial extension who draws the dish, draw the claw and be a plurality of, a plurality of draw the claw to encircle the axial evenly distributed who draws the dish. The utility model discloses a high-speed motor bearing drawing device draws the claw and stretches into the clearance between bearing and the bearing frame, rotates and draws the claw to make and draw the claw to buckle the bearing, and the removal portion removes for the fixed part, drives and draws a set synchronous motion, and then drives and draw the claw to remove, makes the bearing along motor shaft axial displacement, realizes dismantling the bearing smoothly to the bearing that is located narrow and small space, and convenient operation, swift demolish efficiently.

Description

High-speed motor bearing drawing device

Technical Field

The utility model relates to a motor technical field especially relates to a high-speed motor bearing draw-off gear.

Background

The bearing is an important supporting part of the rotating machine, and the rotating machine cannot rotate without the bearing. In the stages of design verification, after-sale maintenance and the like of a product prototype, the bearing is inevitably required to be assembled and disassembled. The bearing is disassembled from the shaft, and a special puller tool for the bearing is needed.

For a high-speed motor, the space near the bearing installation position is narrow, and the structure size of the existing bearing puller is large, so that the bearing can not be detached from a shaft in a narrow space, and the bearing of the high-speed motor is difficult to detach.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a high-speed motor bearing draw-off gear to solve the problem that high-speed motor bearing dismantles the difficulty.

The embodiment of the utility model provides a high-speed motor bearing drawing device, which comprises a fixed part, a movable part and a drawing claw component; the fixing part is used for abutting against the motor rotating shaft; the moving part is movably connected with the fixed part and can move relative to the fixed part along the axial direction of the rotating shaft of the motor; draw the claw subassembly to include the drawing dish and draw the claw, the drawing dish can follow motor shaft axial displacement under the drive of removal portion, draw claw rotatable coupling be in on the drawing dish, just draw the claw to follow the axial extension of drawing dish, draw the claw to be a plurality of, a plurality of draw the claw to encircle the axial evenly distributed of drawing the dish.

According to the utility model discloses an aspect, draw the claw including claw body and claw head, the first end of claw body with draw a set rotatable coupling, claw head fixed connection be in the second end of claw body, just claw head with become the contained angle between the claw body.

According to an aspect of the embodiment of the present invention, by axial observation of the drawing plate, the claw head is arc-shaped.

According to the utility model discloses an aspect, drawing dish passes through lock nut fixed connection and is in on the removal portion, draw the claw with the one end that drawing dish is connected is provided with set nut.

According to the utility model discloses an aspect, the fixed part is used for having the circular cone top with the one end of motor shaft butt.

According to the utility model discloses an aspect, the fixed part includes hydraulic ejector pin, the removal portion includes the hydraulic cylinder body, the first end of hydraulic ejector pin be used for with the motor shaft butt, the second end of hydraulic ejector pin by the first end of hydraulic cylinder body stretches into in the hydraulic cylinder body, the hydraulic ejector pin with the hydraulic cylinder body can be followed the axial relative motion of hydraulic ejector pin.

According to the utility model discloses an aspect, the second end of pneumatic cylinder body is connected with fast connector plug, fast connector plug be used for with hydraulic pump connection, hydraulic oil gets into by fast connector plug under the hydraulic pump effect pneumatic cylinder body second end with space between the hydraulic ram second end, in order to promote hydraulic ram with pneumatic cylinder body relative motion.

According to the utility model discloses an aspect, be provided with reset spring in the pneumatic cylinder body, reset spring cup joints on the hydraulic ram, reset spring's one end be used for with the second end butt of hydraulic ram, reset spring's the other end be used for with the first end butt of pneumatic cylinder body.

According to the utility model discloses an aspect, the fixed part includes the threaded rod, the first end of threaded rod be used for with the motor shaft butt, the drawing dish passes through the helicitic texture and connects on the threaded rod, the threaded rod with the drawing dish can be followed the axial relative motion of threaded rod.

The embodiment of the utility model provides a high-speed motor bearing draw-off gear, draw the claw to stretch into the clearance between bearing and the bearing frame, it makes to draw the claw to buckle the bearing to rotate to draw the claw, fixed part and motor shaft butt, the removal portion removes for the fixed part, the drive is drawn set synchronous motion, and then the drive is drawn the claw and is removed, make the bearing along motor shaft axial displacement, realize dismantling the bearing, because draw the claw rotatable, also can stretch into when the clearance between bearing and the bearing frame is narrower, rotate again after stretching into and can buckle the bearing, can dismantle smoothly to the bearing that is in narrow and small space, high operation, high speed, it is efficient to demolish, the problem of high-speed motor bearing dismantlement difficulty has been solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the environment in which a bearing of a high-speed motor of the prior art is located;

fig. 2 is a schematic structural diagram of a high-speed motor bearing drawing device according to an embodiment of the present invention;

fig. 3 is a schematic view of a use state of the high-speed motor bearing drawing device according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a high-speed motor bearing drawing device according to another embodiment of the present invention.

In the drawings:

100-motor rotating shaft, 200-bearing, 300-bearing seat, 400-gap, 500-drawing disc, 600-drawing claw, 700-conical tip, 800-hydraulic ejector rod, 900-hydraulic cylinder body and 110-threaded rod;

501-locking a nut;

601-claw head, 602-positioning nut;

801-first O-shaped sealing ring, 802-O-shaped sealing ring retainer ring and 803-return spring;

901-quick connection plug, 902-hydraulic cylinder guide sleeve, 903-second O-shaped sealing ring.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention, but are not intended to limit the scope of the invention, i.e., the invention is not limited to the described embodiments.

In the description of the present invention, it is to be noted that, unless otherwise specified, the terms "first" and "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; "plurality" means two or more; the terms "inner", "outer", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

The high-speed motor can be applied to various industries, such as compressors, micro gas turbines and the like, and the rotating speed of the high-speed motor is very high and can reach above 36000rpm, so that the characteristics of rotor dynamics need to be adjusted by relying on a squirrel-cage elastic support damper, and the adjacent-order rotating speed of the high-speed motor meets the corresponding standard specification. Particularly, when oil injection lubrication is adopted, the labyrinth seal structures have to be designed at the two ends of the bearing 200, which results in that the bearing housing 300 cannot be removed first and then the bearing 200 cannot be removed, and the gap 400 between the bearing 200 and the bearing housing 300 is still narrow after the squirrel cage elastic support damper is removed, as shown in fig. 1, the bearing 200 is difficult to remove.

Referring to fig. 2, a high-speed motor bearing 200 drawing apparatus according to an embodiment of the present invention includes a fixing portion, a moving portion, and a drawing claw assembly; the fixing part is used for abutting against the motor rotating shaft 100; the moving part is movably connected with the fixed part and can move relative to the fixed part along the axial direction of the motor rotating shaft 100; draw the claw subassembly to include drawing dish 500 and draw claw 600, draw dish 500 can be under the drive of removal portion along motor shaft 100 axial displacement, draw claw 600 rotatable coupling on drawing dish 500, and draw claw 600 along the axial extension who draws dish 500, draw claw 600 to be a plurality of, a plurality of draw claw 600 to encircle the axial evenly distributed who draws dish 500. In this embodiment, the pulling claw 600 extends into the gap 400 between the bearing 200 and the bearing seat 300, the pulling claw 600 is rotated to enable the pulling claw 600 to buckle the bearing 200, the fixed portion abuts against the motor rotating shaft 100, the moving portion moves relative to the fixed portion to drive the pulling disc 500 to move synchronously, and further the pulling claw 600 is driven to move, so that the bearing 200 moves axially along the motor rotating shaft 100, the bearing 200 can be disassembled, because the pulling claw 600 is rotatable, the pulling claw can also extend into the gap 400 between the bearing 200 and the bearing seat 300 when the gap 400 is narrow, the bearing 200 can be buckled by rotating after extending, the bearing 200 in a narrow space can be disassembled smoothly, the operation is convenient and fast, and the disassembling efficiency is high.

For the dismounting of the bearing 200 of the high-speed motor, after the squirrel-cage elastic support damper is dismounted, the pull claw 600 in the high-speed motor bearing 200 drawing device of the embodiment is extended into the gap 400 between the bearing 200 and the bearing seat 300 to dismount the bearing 200, so that the dismounting requirement of the bearing 200 of the high-speed motor is met.

The number of the pulling claws 600 of the embodiment can be multiple, such as two or three, and the multiple axial uniform distribution surrounding the pulling disk 500 enables the bearing 200 to be stressed uniformly during disassembly, so that the disassembly is more convenient. Fig. 2 shows a cross-sectional view with three pull tabs 600.

As an alternative embodiment, the pulling claw 600 includes a body and a head 601, a first end of the body is rotatably connected to the pulling plate 500, the head 601 is fixedly connected to a second end of the body, and an angle is formed between the head 601 and the body.

In this embodiment, the claw head 601 and the claw body form an included angle, so that the bearing 200 can be fastened, and the bearing 200 can be detached. The included angle may be an acute angle or a right angle, preferably a right angle.

As an alternative embodiment, the claw head 601 has a circular arc shape as viewed in the axial direction of the drawing plate 500.

The circular arc-shaped claw head 601 of the embodiment can smoothly extend into the annular gap 400 between the bearing 200 and the bearing pedestal 300, so that the width of the claw head 601 can be reduced to extend into the narrow annular gap 400, the length of the claw head can be increased to reach the effect that the claw head 601 is simultaneously abutted against the inner ring and the outer ring of the bearing 200, the bearing 200 in a narrow space can be dismantled, and the bearing 200 cannot be easily damaged in the dismantling process.

As an alternative embodiment, the drawing plate 500 is fixedly connected to the moving part by a locking nut 501, and a positioning nut 602 is provided at one end of the drawing claw 600 connected to the drawing plate 500.

In this embodiment, the drawing plate 500 is sleeved on the moving part and is limited by the lock nut 501. The drawing disc 500 is provided with limiting through holes which are uniformly distributed along the circumferential direction, and the drawing claw 600 penetrates through the limiting through holes and is positioned through the positioning nut 602. The number of the limiting through holes is the same as that of the pull claws 600.

As an alternative embodiment, one end of the fixing portion for abutting against the motor shaft 100 has a conical tip 700.

The arrangement of the conical center 700 of the present embodiment facilitates the positioning of the whole device by means of the central hole on the motor shaft 100.

Referring to fig. 3, for the sake of simplicity, only the outer ring of the bearing 200 is shown in the drawing, and only the inner hole edge of the bearing seat 300 is shown in the drawing, after the pulling claw 600 passes through the gap 400 between the bearing 200 and the bearing seat 300, the pulling claw 600 is rotated, and then the pulling disk 500 and the positioning nut 602 are appropriately adjusted, so that the conical center 700 is pushed against the central hole of the motor rotating shaft 100. The moving part is moved backward with respect to the fixed part as appropriate so that the locking nut 501 locks the drawing disc 500, and then the moving part is moved slowly with respect to the fixed part so that the bearing 200 is removed from the motor shaft 100.

As an alternative embodiment, the fixed portion includes a hydraulic ram 800, the moving portion includes a hydraulic ram cylinder 900, a first end of the hydraulic ram 800 is configured to abut against the motor shaft 100, a second end of the hydraulic ram 800 extends into the hydraulic ram cylinder 900 from the first end of the hydraulic ram cylinder 900, and the hydraulic ram 800 and the hydraulic ram cylinder 900 can move relatively along an axial direction of the hydraulic ram 800.

In this embodiment, the cylinder body 900 can move relative to the hydraulic ram 800 along the axial direction of the hydraulic ram 800, so that the axial direction of the hydraulic ram 800 and the axial direction of the motor shaft 100 coincide in use.

An integral hydraulic structure can be adopted, the hydraulic push rod 800 and the hydraulic cylinder body 900 are taken as basic components of the integral hydraulic structure, and the hydraulic push rod 800 can stretch relative to the hydraulic cylinder body 900 during operation.

Accept the aforesaid, draw set 500 and cup joint in hydraulic cylinder body 900 outsidely, and draw set 500 accessible helicitic texture and be connected with hydraulic cylinder body 900, lock nut 501 locks draw set 500 for it is more stable to dismantle the position of bearing 200 in-process draw set 500 on hydraulic cylinder body 900.

As an alternative embodiment, the second end of the hydraulic cylinder body 900 is connected with a quick-connect plug 901, the quick-connect plug 901 is used for being connected with a hydraulic pump, and hydraulic oil enters a space between the second end of the hydraulic cylinder body 900 and the second end of the hydraulic ram 800 through the quick-connect plug 901 under the action of the hydraulic pump, so as to push the hydraulic ram 800 and the hydraulic cylinder body 900 to move relatively.

In this embodiment, a split hydraulic structure may be adopted, and an external hydraulic pump provides power for the relative movement of the hydraulic ram 800 and the hydraulic cylinder body 900. When the hydraulic pump pressurizes, hydraulic ram 800 stretches out from cylinder body 900, because hydraulic ram 800 and motor shaft 100 butt for cylinder body 900 is kept away from motor shaft 100 and is removed, drives and draws claw subassembly synchronous motion, realizes dismantling bearing 200 on the motor shaft 100.

The hydraulic pump is connected with the quick connector through an oil pipe, and the hydraulic cylinder body 900 and the hydraulic ejector rod 800 are sealed with hydraulic oil through a first O-shaped sealing ring 801 and an O-shaped sealing ring retainer ring 802. The hydraulic pump can adopt a manual hydraulic pump or an electric hydraulic pump.

In addition, the second end of the hydraulic ram 800 may be sleeved with a first O-ring 801, and an O-ring retainer 802 is provided to seal a space between the second end of the hydraulic ram 800 and the second end of the hydraulic cylinder 900. The first end of the hydraulic cylinder body 900 can be provided with a hydraulic cylinder guide sleeve 902, the hydraulic cylinder guide sleeve 902 guides the hydraulic push rod 800, and the inner ring of the hydraulic cylinder guide sleeve 902 can be provided with a second O-shaped sealing ring 903, so that the inner surface of the hydraulic cylinder body 900 can be prevented from being scratched when the hydraulic push rod 800 moves relatively due to the fact that external impurities enter the hydraulic cylinder body 900.

As an optional embodiment, a return spring 803 is disposed in the hydraulic cylinder body 900, the return spring 803 is sleeved on the hydraulic ram 800, one end of the return spring 803 is used for abutting against the second end of the hydraulic ram 800, and the other end of the return spring 803 is used for abutting against the first end of the hydraulic cylinder body 900. When the pressure is released, the hydraulic ram 800 automatically retracts into the hydraulic cylinder body 900 under the action of the return spring 803.

Receiving the above, one end of the return spring 803 abuts against the second end of the hydraulic ram 800, and the other end of the return spring 803 abuts against the cylinder guide 902.

Referring to fig. 4, as an alternative embodiment, the fixing portion includes a threaded rod 110, a first end of the threaded rod 110 is configured to abut against the motor shaft 100, the drawing plate 500 is connected to the threaded rod 110 through a threaded structure, and the threaded rod 110 and the drawing plate 500 are capable of moving relative to each other along an axial direction of the threaded rod 110.

In this embodiment, a screw structure may be adopted, the drawing disc 500 is capable of moving relative to the threaded rod 110 along the axial direction of the threaded rod 110, and in use, the threaded rod 110 is rotated, so that the drawing disc 500 moves towards the second end of the threaded rod 110 along the axial direction of the threaded rod 110, and drives the drawing claw 600 to move, so as to detach the bearing 200 from the motor rotating shaft 100.

Two clamping planes parallel to the axial direction of the threaded rod 110 may be disposed on the threaded rod 110 in a section near the first end of the threaded rod 110, and the two clamping planes may be axially symmetric with respect to the threaded rod 110, so that a wrench can clamp the threaded rod 110 conveniently, and further, the threaded rod 110 can be rotated conveniently, and the bearing 200 can be disassembled.

It should be understood by those skilled in the art that the foregoing is only illustrative of the present invention, and the scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (9)

1. A high-speed motor bearing drawing device is characterized by comprising:

the fixing part is used for abutting against the motor rotating shaft;

the moving part is movably connected with the fixed part and can move relative to the fixed part along the axial direction of the rotating shaft of the motor; and

draw the claw subassembly, including drawing the dish and drawing the claw, drawing the dish can move along motor shaft axial under the drive of removal portion, draw claw rotatable coupling be in on the drawing dish, just draw the claw to follow the axial extension of drawing the dish, it is a plurality of, a plurality of to draw the claw to encircle the axial evenly distributed of drawing the dish.

2. The high-speed motor bearing drawing device of claim 1, wherein the drawing claw comprises a claw body and a claw head, a first end of the claw body is rotatably connected with the drawing disc, the claw head is fixedly connected with a second end of the claw body, and an included angle is formed between the claw head and the claw body.

3. The high-speed motor bearing pulling apparatus of claim 2, wherein the claw head is arc-shaped as viewed in an axial direction of the pulling disk.

4. The high-speed motor bearing drawing device of claim 1, wherein the drawing disc is fixedly connected to the moving part through a locking nut, and a positioning nut is arranged at one end of the drawing claw connected with the drawing disc.

5. The high-speed motor bearing pulling device according to claim 1, wherein one end of the fixing part, which is used for being abutted against a rotating shaft of the motor, is provided with a conical tip.

6. The high-speed motor bearing drawing device according to claim 1, wherein the fixed part comprises a hydraulic ram, the moving part comprises a hydraulic cylinder body, a first end of the hydraulic ram is used for abutting against a rotating shaft of the motor, a second end of the hydraulic ram extends into the hydraulic cylinder body from the first end of the hydraulic cylinder body, and the hydraulic ram and the hydraulic cylinder body can move relatively along an axial direction of the hydraulic ram.

7. The high-speed motor bearing drawing device of claim 6, wherein a second end of the hydraulic cylinder body is connected with a quick-connection plug, the quick-connection plug is used for being connected with a hydraulic pump, and hydraulic oil enters a space between the second end of the hydraulic cylinder body and the second end of the hydraulic ejector rod through the quick-connection plug under the action of the hydraulic pump so as to push the hydraulic ejector rod and the hydraulic cylinder body to move relatively.

8. The high-speed motor bearing pulling device as claimed in claim 6, wherein a return spring is arranged in the hydraulic cylinder body, the return spring is sleeved on the hydraulic ejector rod, one end of the return spring is used for being abutted against the second end of the hydraulic ejector rod, and the other end of the return spring is used for being abutted against the first end of the hydraulic cylinder body.

9. The high-speed motor bearing drawing device of claim 1, wherein the fixing portion comprises a threaded rod, a first end of the threaded rod is used for being abutted against a rotating shaft of a motor, the drawing disc is connected to the threaded rod through a threaded structure, and the threaded rod and the drawing disc can move relative to each other in the axial direction of the threaded rod.

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