CN215897539U

CN215897539U - High-voltage motor rotor drawing and assembling device

Info

Publication number: CN215897539U
Application number: CN202121995101.9U
Authority: CN
Inventors: 白鹏飞; 黄海; 张双双
Original assignee: Shaanxi Yanchang Chinacoal Yulin Energy Chemical Co ltd
Current assignee: Shaanxi Yanchang Zhongmei Yulin Energy And Chemical Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-02-22
Anticipated expiration: 2031-08-23

Abstract

The utility model discloses a high-voltage motor rotor extracting and assembling device. The rotor drawing and assembling device comprises a base plate, a supporting upright post, a lifting disc and a rotor supporting clamping piece. The hollow steel pipe is hung through a hanging strip connected with the travelling crane, the hollow steel pipe is sleeved at one end of the rotor, the lifting disc on the supporting upright post is moved to the other end of the rotor by using the chassis, the lifting disc is supported by using the jack, and meanwhile, the hanging strip connected with the travelling crane is adjusted upwards, so that the rotor is not contacted with the cavity of the stator after the rotor bearing seat is disassembled, and the rotor can lean against the lifting disc in a slightly inclined state by using the rotor supporting clamping piece; and the chassis is moved reversely and the movable travelling crane is matched, so that the rotor slides out of the stator. The utility model solves the problem that the rotor is easy to damage when being drawn and installed by a crane, and is suitable for drawing and installing the rotor of the high-voltage motor on site.

Description

High-voltage motor rotor drawing and assembling device

Technical Field

The utility model relates to the field of disassembly and maintenance of high-voltage motors for petrochemical enterprise production, in particular to a high-voltage motor rotor extracting and assembling device.

Background

With the expansion and production increase of enterprises, high-voltage motors have become main equipment for continuous operation in production areas. In the fault maintenance of the high-voltage motor, frequent motor rotor extraction and assembly operations are required, but due to the limitation of equipment conditions in a production area, disassembly fault diagnosis and maintenance of the high-voltage motor cannot be completed on site due to rotor extraction and assembly, once the high-voltage motor needs to be delivered for maintenance, the influence on the stable operation of a production device is caused, and the production device can even be stopped for a long time in severe cases, so that huge economic loss is caused.

In order to realize the field drawing and assembling operation of the motor rotor, the chinese patent CN204707006U uses a crane and applies forces in different directions to the motor rotor through a lifting ring, thereby realizing the separation and assembly of the rotor and the stator. However, in this patent, the rotor of the motor is drawn out and installed mainly by means of the action of the crane, the accuracy and controllability of the operation are poor, the motor (for example, an iron core and a winding which jointly form the rotor and are fixed on a rotor shaft) is easily damaged, and for large motors such as high-voltage motors, the space for implementing the operation on site is limited, and the motor cannot be well suitable for site maintenance.

Although chinese patents CN212875622U and CN212649319U improve the accuracy and controllability of the motor rotor drawing and assembling operation through different designed clamps and sliding mechanisms, the structure and operation of the drawing and assembling device itself are complex, the cost is high, and meanwhile, there is an obvious limitation in the specification of the applicable motor, for example, CN212649319U is generally applicable to small and medium-sized motors with power of 30 to 160kW and rotor weight of 40 to 180 kg.

Disclosure of Invention

The utility model aims to provide a high-voltage motor rotor extracting and assembling device.

The rotor drawing and assembling device comprises a frame body capable of moving along the axial direction of a high-voltage motor rotor and a lifting disc arranged on the frame body, wherein a rotor supporting clamping piece is arranged on the lifting disc, and the rotor supporting clamping piece comprises more than two rolling friction surfaces matched with the end part (specifically the end part of a rotor shaft) of the high-voltage motor rotor.

Preferably, the frame body includes a chassis, and a rolling element for driving the chassis to move, a lifting mechanism for driving the lifting disc, and a support column for keeping the lifting disc horizontal are arranged on the chassis.

Preferably, the chassis is of an H-shaped plane frame structure, the lifting mechanism is located in the center of the chassis, and more than one supporting upright column is arranged on each of two sides of the lifting mechanism.

Preferably, the lifting disc comprises guide rings surrounding the outer sides of the support columns and support bodies connected with the guide rings, and the support bodies are connected with the lifting mechanism.

Preferably, the rotor supporting clamping piece specifically comprises a connecting shaft arranged on the supporting body and a plurality of bearings arranged on the connecting shaft, and the centers of the bearings are parallel to the axial direction of the high-voltage motor rotor (the outer rings of the bearings are used as the rolling friction surfaces).

Preferably, the support body comprises two opposite support vertical surfaces, each support vertical surface is provided with a plurality of mutually spaced clamping grooves for placing the connecting shaft, the clamping grooves on the two support vertical surfaces correspond in position, and the lower part of each bearing on the connecting shaft is embedded between the two support vertical surfaces.

Preferably, the frame body further comprises handrails connected with the support columns.

Preferably, the rolling body comprises a rolling shaft connected with the chassis and wheels arranged at two ends of the rolling shaft.

Preferably, the wheel comprises a PU polyurethane iron core wheel and a sealing type bearing arranged at the center of the iron core wheel, and the rolling shaft is connected with the iron core wheel through the sealing type bearing.

Preferably, the rotor drawing and assembling device further comprises a hoisting mechanism (or another rotor drawing and assembling device replaces the hoisting mechanism) capable of moving synchronously with the frame body, and the hoisting mechanism (for example, a travelling crane) is connected with the pipe body for replacing the corresponding rotor in the cavity of the stator of the high-voltage motor.

The utility model has the beneficial effects that:

according to the rotor extracting and assembling device, the rotors with different specifications can be supported by lifting and lowering the lifting disc, and the rotors are effectively and radially fixed in the process that the rotors slide out of the stator along with the movement of the chassis by means of the rotor supporting clamping piece, so that large-scale hoisting equipment (such as a crane) is not needed for extracting and assembling the rotors, the accuracy and controllability of extracting and assembling operation are improved, the field nondestructive disassembly fault diagnosis and maintenance of a high-voltage motor can be completely realized, the production and operation cost is obviously reduced, the non-productive time consumption is saved, the reliable operation of a production device is guaranteed, and the economic benefit is improved.

Furthermore, the lifting action of the lifting disc is restrained by the supporting upright posts, so that the lifting disc is prevented from deflecting in the lifting process, and the safety of personnel and equipment is protected.

Furthermore, the fixing position of the rolling friction surface in the rotor support clamping piece can be flexibly adjusted through the clamping grooves formed in the support body, and the rotor support clamping piece is suitable for fixing rotors of high-voltage motors with different specifications.

Furthermore, the utility model adopts a sealing type bearing and a PU polyurethane iron core wheel to form a movable part (wheel) of the rolling body; on one hand, the bearing capacity of the chassis can be improved, and on the other hand, the bearing can be effectively prevented from being blocked due to entering of sundries in the moving process, so that the failure rate is reduced.

Furthermore, the utility model improves the accurate control of the clearance between the rotor and the stator in the casing through the travelling crane, reduces the damage risk of the motor in the pumping and assembling operation and improves the operation efficiency.

Drawings

FIG. 1 is a schematic structural diagram (top view) of a rotor drawing and assembling device of a high-voltage motor in an embodiment;

FIG. 2 is a schematic structural diagram (front view) of a rotor extracting and installing device of a high-voltage motor in an embodiment;

FIG. 3 is a schematic structural view (side view) of a rotor drawing device of a high-voltage motor in an embodiment;

FIG. 4 is a schematic structural view (bottom view) of a rotor extracting and installing device of a high-voltage motor in an embodiment;

fig. 5 is a schematic drawing of a rotor of a high-voltage motor in an embodiment (the rotor is represented by a representation of a rotor shaft in the drawing, namely, a rotor core is omitted in the drawing);

FIG. 6 is a schematic view of the rotor and the lifting plate;

FIG. 7 is a schematic view of a lifting disc drive;

FIG. 8 is a schematic structural view of the buckle;

FIG. 9 is a schematic view showing a fixing manner of the rolling axis;

in the figure: 1. a roll axis; 2. a wheel; 3. a chassis; 4. a handrail; 5. the rotor supports the fastener; 6. a card slot; 7. a lifting plate; 8. supporting the upright post; 9. fixing the rolling shaft clamping piece; 10. a wheel bearing; 11. a reinforcing support; 12. a card member bearing; 13. a stator; 14. a rotor; 15. a hollow steel pipe; 16. a sling; 17. hooking; 18. a jack; 19. buckling; 20. a screw; 21. and (7) fixing the plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the utility model.

The utility model provides a device for realizing the extraction and assembly operation of a high-voltage motor rotor aiming at the maintenance workshop conditions of a petrochemical plant, and solves the problem that the high-voltage motor rotor is difficult to extract and assemble on site in the existing petrochemical plant.

Structure of high-voltage motor rotor drawing and assembling device

Referring to fig. 2, fig. 3, fig. 4 and fig. 6, the high-voltage motor rotor drawing and assembling device provided by the utility model is simple and durable, and comprises a chassis 3, a supporting upright 8, a handrail 4, a lifting disc 7 and an adjustable motor rotor supporting clamping piece 5, wherein two rolling shafts 1 are arranged on the front side and the rear side of the bottom of the chassis 3, and form rolling bodies for driving the chassis 3 to move together with four wheels 2 which are arranged at two ends of the two rolling shafts 1. Chassis 3, support post 8 and handrail 4 form the frame body, and chassis 3 is plane frame construction, and two support post 8 vertical welding are on 3 left and right both sides on chassis, and every support post 8 is with 3 front and back perpendicular welding enhancement props 11 respectively of chassis 3 welding department (the enhancement of both sides is propped around, can effectively increase the intensity of support post, strengthen the support dynamics). The lifting disc 7 is sleeved on the two supporting upright posts 8, a hydraulic jack 18 is fixedly installed in the middle of the chassis 3 (between the two supporting upright posts 8), the hydraulic jack 18 is supported at the geometric central point of the lifting disc 7, and the lifting and the lowering of the lifting disc 7 can be realized by manually adjusting the hydraulic jack 18. The lifting disc 7 is made by welding channel steel and hollow steel pipes, the adjustable motor rotor support clamping piece 5 adopts two sets of bearings (each set comprises two bearings and is called a clamping piece bearing 12) which are coaxially connected in series at a certain distance, a plurality of pairs of clamping grooves 6 are formed in two side wings of the channel steel forming the lifting disc 7, on one hand, the bearings are clamped and fixed on a shaft used for connecting the bearings in series, on the other hand, the distance between the two sets of bearings is adjusted (the diameter of the rotor shaft is referred to), and therefore the lifting disc 7 can be enabled to fix the high-voltage motor rotor end parts with different specifications by utilizing rolling friction surfaces provided by the bearings (the specific contact object is the side surface adjacent to the end of the rotor shaft). The handrail 4 is made of angle steel, and two ends of the angle steel are clamped and fixed at the tops of the two supporting upright columns 8 through openings at one side. The rolling shaft 1 is positioned outside the plane of the chassis 3 (fixed at the bottom of the chassis 3 through the fixed rolling shaft clamping piece 9), and is connected with wheels 2 positioned outside the left side and the right side of the bottom of the chassis 3, the wheels are composed of PU polyurethane iron core wheels with the diameter of 200mm and wheel bearings 10 (for example, sealed bearings such as 6204-2RSH deep groove ball bearings) so that the chassis 3 can bear the load weight of less than 2 tons in the moving process, and the sealed bearings can also effectively prevent foreign matters from entering the rolling bodies.

Assembling process of high-voltage motor rotor drawing and assembling device

1) Manufacturing a vehicle body main frame (namely a frame body): cutting two No. 10 channel steels with the lengths of 70cm and a No. 10 channel steel with the lengths of 40cm, and vertically welding the No. 10 channel steel with the lengths of 40cm to the positions, corresponding to the respective geometric central points, of the inner sides of the two No. 10 channel steels with the lengths of 70cm to form an H-shaped planar frame structure (the side wings of the channel steels are downward), namely an H-shaped chassis 3; intercepting two DN80 galvanized steel pipes with the length of 60cm as two supporting upright posts 8, respectively welding the two supporting upright posts 8 at the geometric center points of channel steel with the length of 70cm at the left side and the right side of the H-shaped chassis 3, and enabling the supporting upright posts 8 to be vertical to the upper side planes of the channel steel at the left side and the right side of the H-shaped chassis 3; four 7cm x 10cm x 5cm (upper bottom x lower bottom x high) right trapezoid steel plates No. 8 are intercepted as reinforcing supports 11, the four reinforcing supports 11 are respectively welded at the front and rear sides of the intersection of the two supporting columns 8 and the H-shaped chassis 3 so as to reinforce the stability of the supporting columns 8, wherein the 5cm side of each reinforcing support 11 is welded to the channel steel of the H-shaped chassis 3, and the 10cm side of each reinforcing support 11 is welded to the supporting columns 8. A hydraulic jack 18 (figure 7) is arranged at the geometric center point of the channel steel with the length of 40cm of the H-shaped chassis 3.

2) Two phi 22 round solid steels with the length of 74cm are taken as rolling shafts 1, two ends of the rolling shafts are processed into shafts with the distance of 6cm and phi 20 from the edge, fixing grooves are processed at the positions of the two ends, which are 1cm away from the edge, and four PU polyurethane iron core wheels are respectively fixed at two ends of the two phi 22 round solid steels with the length of 74cm by utilizing a sealing type bearing (particularly 6204-2RSH deep groove ball bearing) at the center of the PU polyurethane iron core wheels.

3) Manufacturing a fixed rolling shaft clamping piece: cutting four steel plates of 15cm multiplied by 4cm multiplied by 0.8cm (length multiplied by width multiplied by thickness), respectively welding the four steel plates on the bottom edge of the outer side of a channel steel of 70cm (parallel to the top surface of the channel steel) of the H-shaped chassis 3 to be used as a fixing plate 21 for fixing a rolling shaft; cutting four pieces of 40 flat steel with the length of 25cm, processing the 40 flat steel into four buckles 19 with phi 22 circular arcs, and respectively dividing phi 12 holes at positions 1.5cm away from the edges on two sides of each buckle 19; horizontally aligning the fasteners 19 with the geometric center points of the fixing plates 21 on the upper sides of the fasteners, and forming phi 12 holes on the corresponding sides (namely on the fixing plates 21) at the openings of the four fasteners 19; two rolling shafts 1 are respectively arranged on four fixing plates 21 through four buckles 19 and are fixed at the opening part by using an M10 screw 20 and a nut, so that rolling bodies at the bottom of the H-shaped chassis 3 are formed through fixing the rolling shaft clamping piece 9 (figures 8 and 9).

4) Manufacturing a lifting disc: two DN100 galvanized steel pipes with the length of 10cm and a No. 10 channel steel with the length of 50cm are intercepted, concave semicircular arc processing is carried out on two ends of the No. 10 channel steel with the length of 50cm, the two DN100 galvanized steel pipes with the length of 10cm are respectively welded at two ends of the No. 10 channel steel with the concave semicircular arc (the channel steel is provided with an opening upwards, and the positions of 5cm and 10cm on the left side and the right side of the respective geometric center point of flanges on two sides are respectively processed by a phi 22 concave semicircular arc as a clamping groove 6), and the lower surfaces of the channel steel and the galvanized steel pipes are enabled to be on the same horizontal plane. Two DN100 galvanized steel pipes of the lifting disc 7 are sleeved on the two supporting upright posts 8, and a channel steel (the opening of the clamping groove 6 is upward) welded between the two DN100 galvanized steel pipes is connected with an output shaft of the hydraulic jack 18 (figure 7).

5) Manufacturing an adjustable motor rotor supporting clamping piece: the adjustable motor rotor supporting clamping piece 5 is formed by cutting out two phi 22 circular solid steels with the length of 11cm, processing two ends of the phi 22 circular solid steels into shafts with the distance of 2.8cm and phi 20 from edges, processing fixing grooves (the distance from the edges is 4.2cm) on the inner sides, respectively fixing inner rings of four bearings (such as 6204-2RSH deep groove ball bearings) at two ends of the two phi 22 circular solid steels with the length of 11cm through the fixing grooves, and respectively placing the two phi 22 circular solid steels with the bearings in two pairs of clamping grooves 6 which correspond to each other in the front and back direction.

6) Installing handrails: cutting a 40 galvanized angle steel with the length of 55cm, and respectively making openings at the positions, 9.5cm away from the edge, of two ends of one side wall surface of the galvanized angle steel; 55cm of 40 galvanized angle steel with an opening is embedded between the tops of the two support columns 8 through the opening to form the handrail 4.

Use of high-voltage motor rotor drawing and assembling device

Referring to fig. 5, taking the rotor of a high-voltage motor weighing 1980kg and 250KW as an example, a rotor extracting process will be described first: sleeving one end of a hollow steel pipe 15 with the length being larger than that of a motor rotor 14 (the length of a rotor shaft is 3m) and the inner diameter being slightly larger than the diameter of the rotor shaft into one end of the motor rotor 14 (specifically the rotor shaft), hanging the other end of the hollow steel pipe 15 by a hook 17 and a hanging strip 16 during traveling, pushing a rotor pulling and installing device (specifically a frame body and a lifting disc 7 with an adjustable motor rotor supporting clamping piece 5 arranged on the frame body) to the other end of the motor rotor 14 through a handrail 4, adjusting the rotor supporting clamping piece 5 (namely adjusting the distance between two clamping piece bearings) to a proper position, supporting the lifting disc 7 to the proper position through a hydraulic jack 18, enabling the motor rotor 14 to lean against the mounting disc 7 through the rotor supporting clamping piece 5, and finely adjusting the lifting disc 7 and the hanging strip 16 upwards at the same time to ensure that a certain movable distance exists between the motor rotor 14 and a stator 13 after a rotor bearing seat is disassembled, and the motor rotor 14 is made to tilt slightly against the end of the lifting disk 8. By simultaneously operating the handle of the traveling crane and pulling the handrail 4, the motor rotor 14 can continuously slide out quickly and stably along with the movement of the hook 17 and the rotor withdrawing and installing device in the direction away from the motor, a square sleeper with a certain height is padded below the motor rotor 14 when the motor rotor 14 is completely withdrawn (at the moment, the hollow steel pipe 15 slides into the cavity of the stator 13 to replace the motor rotor 14), the hook 17 and the lifting disc 7 are operated to slowly fall simultaneously until the square sleeper is stressed, the hollow steel pipe 15 is withdrawn at the moment, the motor rotor 14 is directly hung by the hanging belt 16, and the motor rotor 14 is transferred to the ground by the traveling crane.

A process of mounting the rotor of the high-voltage motor into the stator (substantially reverse to the above-described process of extracting the rotor): after passing through the stator 13, the hollow steel tube 15 is connected with the motor rotor 14 which is padded by the square sleeper again; and lifting the lifting disc 7, lifting the hollow steel tube 15 by using a travelling crane until the state that the motor rotor 14 can move in the stator 13 is recovered, then pushing the handrail 4 and simultaneously operating a travelling crane handle, withdrawing the hollow steel tube 15, simultaneously returning the motor rotor 14 to the stator 13, lowering the lifting disc 7 after mounting a rotor bearing seat, and withdrawing the rotor withdrawing and installing device and the hollow steel tube 15.

(IV) characteristics of high-voltage motor rotor drawing and assembling device

1) The device has the advantages of simple and compact structure, durability, low cost, convenient on-site realization of disassembly fault diagnosis and maintenance of the high-voltage motor in a production device, and good use effect.

2) The rotor of the motor with the center height of 315-660 mm and the rotor weight of less than 2 tons is drawn and installed, and the application range is wider.

Claims

1. A motor rotor drawing and assembling device is characterized in that: the rotor drawing and assembling device comprises a frame body capable of moving along the axial direction of a motor rotor and a lifting disc (7) arranged on the frame body, wherein a rotor supporting clamping piece (5) is arranged on the lifting disc (7), and the rotor supporting clamping piece (5) comprises more than two rolling friction surfaces matched with the end part of the motor rotor.

2. An electric motor rotor extraction device according to claim 1, characterized in that: the frame body comprises a chassis (3), wherein a rolling body for driving the chassis (3) to move, a lifting mechanism for driving the lifting disc (7) and a supporting upright post (8) for keeping the lifting disc (7) horizontal are arranged on the chassis (3).

3. An electric motor rotor extraction device according to claim 2, characterized in that: the chassis (3) is of an H-shaped plane frame structure, the lifting mechanism is located in the center of the chassis (3), and more than one supporting upright post (8) is arranged on each of the two sides of the lifting mechanism.

4. A motor rotor extraction and installation apparatus as claimed in claim 3, wherein: the lifting disc (7) comprises guide rings surrounding the outer side of the support upright post (8) and support bodies connected with the guide rings, and the support bodies are connected with the lifting mechanism.

5. The motor rotor extraction and installation device of claim 4, wherein: the rotor supporting clamping piece (5) specifically comprises a connecting shaft arranged on the supporting body and a plurality of bearings arranged on the connecting shaft, and the centers of the bearings are axially parallel to the rotor of the motor.

6. An electric motor rotor extraction device according to claim 5, wherein: the supporting body comprises two supporting vertical surfaces which are arranged oppositely, each supporting vertical surface is provided with a plurality of mutually-spaced clamping grooves (6) for placing the connecting shaft, the positions of the clamping grooves (6) on the two supporting vertical surfaces correspond, and the lower part of a bearing on the connecting shaft is embedded between the two supporting vertical surfaces.

7. A motor rotor extraction and installation apparatus as claimed in claim 3, wherein: the frame body also comprises handrails (4), and the handrails (4) are connected with the supporting upright posts (8).

8. An electric motor rotor extraction device according to claim 2, characterized in that: the rolling body comprises a rolling shaft (1) connected with the chassis (3) and wheels (2) arranged at two ends of the rolling shaft (1).

9. An electric motor rotor extraction device according to claim 8, wherein: the wheel (2) comprises a PU polyurethane iron core wheel and a sealing type bearing arranged at the center of the iron core wheel, and the rolling shaft (1) is connected with the iron core wheel through the sealing type bearing.

10. An electric motor rotor extraction device according to claim 1, characterized in that: the rotor drawing and assembling device further comprises a hoisting mechanism capable of moving synchronously with the frame body, and the hoisting mechanism is connected with the tube body for replacing the motor rotor.