WO2021128572A1

WO2021128572A1 - Large motor rotor assembly tool and use method therefor

Info

Publication number: WO2021128572A1
Application number: PCT/CN2020/076882
Authority: WO
Inventors: 张强; 林英哲; 吴立华; 董继勇
Original assignee: 南京磁谷科技股份有限公司
Priority date: 2019-12-27
Filing date: 2020-02-27
Publication date: 2021-07-01
Also published as: CN110932496B; CN110932496A

Abstract

Disclosed in the present invention are a large motor rotor assembly tool and a use method therefor. The tool comprises a main machine, a feeding assembly, a rotor component, a motor, a base, a guide hole tool, and a position guide frame; an inverted motor is clamped in the main machine, and the main machine is located between the feeding assembly and the base; the feeding assembly clamps the rotor component, and the feeding assembly comprises a guide shaft and a rotor lifting tool; the guide shaft used for guiding the rotor component to be assembled into the main machine is coaxially fixed to one end of the rotor component close to a magnetic steel, and the rotor lifting tool is coaxially fixed to a thrust disc of the rotor component; the position guide frame is coaxially fixed at a top end of the main machine, a mounting hole is formed in a bottom end of the main machine, and the guide hole tool is coaxially mounted in the mounting hole. In the present invention, the assembly tool comprises the feeding assembly and the position guide frame, and in the downward assembly process of the rotor, an upper positioning screw and a lower positioning screw in the position guide frame are folded outwards in sequence, thereby solving the problem that the size of an outer circle of the rotor component continuously changes, and enabling a rotor having a large mass and size to be assembled into the main machine.

Description

A large motor rotor assembly tool and its use method

Technical field

The invention relates to the field of assembling motor parts, in particular to a large motor rotor assembling tool and a use method thereof.

Background technique

At present, there is a big problem with the 1.0MV magnetic bearing rotor installed in the main engine on the market. First of all, because the rotor weighs up to 200 kg and the main machine is of the tonnage level, the assembly of the rotor lacks a corresponding assembly structure, which makes it difficult to assemble the rotor; secondly, the rotor is a permanent magnet rotor with strong magnetism. During the assembly process, the outer circle The surface is easy to be adsorbed to the bearing seat or the inner hole of the motor, and it is difficult to continue assembly or friction damage related parts; the final appearance of the rotor is a stepped shaft, the positioning and guiding outer circle of the rotor during the assembly process will continue to change, and it needs to be replaced continuously Tooling with the size of the guide outer circle; especially the thrust plate structure is sleeved on the interference heat of the rotor, and the outer diameter is larger, which has a greater influence on the assembly guide interference. Therefore, a new assembly tool is urgently needed to solve the above-mentioned problems.

Summary of the invention

Objective of the invention: In view of the lack of assembly work for the rotor of a large motor in the prior art, the present invention discloses an assembly tool for a rotor of a large motor and a method of use thereof, and solves the problem that the rotor of the motor with a large mass and volume is installed in the host.

Technical solution: The present invention discloses a large motor rotor assembly tool and a method of use thereof. The assembly tool includes a main machine, a feeding assembly, a rotor part, a motor, a base, a guide hole tool and a position guide frame; the main machine clamps an inverted motor, The host is located between the feeding assembly and the base. The feeding assembly clamps the rotor part. The top of the host is coaxially fixed with a position guide frame. Both ends of the position guide frame are provided with through holes. The bottom of the host is provided with mounting holes, and the mounting holes are coaxially installed and guided. Hole tooling, position guide frame and guide hole tooling respectively realize the upper and lower guiding functions of the assembly tooling;

The main engine includes a casing, an upper magnetic bearing assembly and a lower magnetic bearing assembly. The inverted motor is clamped in the casing, the upper magnetic bearing assembly is fixed on the top of the main engine, and the lower magnetic bearing assembly is fixed on the bottom of the main engine;

The rotor components include magnets and thrust discs. The bottom ends of the rotor parts are provided with magnets, and the top ends of the rotor parts are fixedly installed with thrust discs;

The feeding assembly includes a guide shaft and a rotor hoisting tool. The guide shaft for guiding the rotor component into the host is coaxially fixed on the end of the rotor component close to the magnetic steel, and the rotor hoisting tool is coaxially fixed on the boss on the top of the rotor;

The position guide frame includes a frame, an upper positioning screw, a lower positioning screw and balls. The frame is provided with threaded holes. The upper and lower positioning screws are movably connected to the frame through the threaded holes. The upper and lower positioning screws are equipped with balls on the inside. ; The upper positioning screw and the lower positioning screw are always attached to the rotor parts through the balls, which are used to realize the positioning guidance during the assembly process.

Preferably, the base includes a support frame and a support plate; the support plate is fixed on the adjustable support frame, the support plate is provided with mounting holes, and the guide hole tooling penetrates through the bottom end of the host and the mounting holes of the support plate. Support plate.

Preferably, the top end of the rotor component is interference-heated with a thrust plate.

Preferably, the rotor component further includes a carbon fiber sheath; the carbon fiber sheath is placed on the outer wall of the rotor component.

Preferably, the ball is a universal ball.

A method of using a large motor rotor assembly tool, including the following steps:

Step A. Assemble the host: Install the position guide frame on the top of the host that has adjusted the positions of the upper and lower positioning screws; install the upper guide hole tooling at the bottom of the host; install the support plate at the bottom of the host and lift it upside down on the support frame on;

Step B. Assemble the feeding assembly on the rotor part: install the rotor lifting fixture and the guide shaft on both ends of the rotor part, and use a crane to lift the rotor part and place it on the main machine;

Step C. Assemble the rotor components: operate the crane, and under the control of the upper end positioning guide and the lower end positioning guide of the rotor assembly, slowly lower the rotor assembly until the thrust plate is placed on the upper magnetic bearing assembly and the rotor is assembled in place;

Step D. Remove the tooling to complete the assembly: remove the position guide frame and the guide shaft, and the rotor assembly is installed in the main machine.

Preferably, the step C further includes:

Step C1. Operate the crane to slowly lower the rotor part, and the guide shaft will enter the main machine first; continue down, the rotor part begins to enter the position guide frame, and the inner balls of the upper positioning screw and the lower positioning screw fit the rotor part;

Step C2. Operate the crane to make the rotor component continue downward, and the guide shaft starts to enter the guide hole tooling to realize the positioning and guiding of the lower end of the rotor assembly;

Step C3. When continuing downward, the rotor assembly enters the motor; the outer circumference of the upper end of the rotor assembly is recessed, so that the lower positioning screw of the position guide frame is pulled out under the action of the balls, and the upper positioning screw is still attached to the rotor assembly through the balls , To realize the positioning and guiding of the upper end of the rotor assembly;

Step C4. After continuing downwards, the outer circle of the thrust plate of the rotor assembly enters the position guide frame, and the upper positioning screw of the position guide frame is all screwed out through the balls, so that the thrust plate continues to slide downward without obstruction until the thrust plate Put it on the upper magnetic bearing assembly, and the rotor is assembled in place.

Beneficial effects:

1. The assembly tooling of the present invention includes a feeding component, a base, a guide hole tooling and a position guide frame, so as to realize the installation of a rotor with a relatively large mass and volume into the host;

2. In the present invention, the outer wall of the rotor part is covered with carbon fiber tooling, and the position guide frame and the guide hole tooling respectively provide an upper guide device and a lower guide device during the assembly process of the rotor part, so as to solve the problem that the rotor will not be caused by magnetic force during the assembly process of the rotor. The problem of excessively large adsorption on the inner hole of the main machine also realizes the protection of the rotor components during the assembly process;

3. By controlling the upper positioning screw and the lower positioning screw in the position guide frame to retract outward in sequence, the present invention solves the problem that the outer circumference of the guide position of the rotor component changes continuously during the downward assembly process of the rotor component, and the guide mechanism must also be constantly changed. Changes and does not interfere with assembly issues.

Description of the drawings

Figure 1 is a general structure diagram of the present invention;

Among them, 1 is the main engine, 11 is the casing, 12 is the upper magnetic bearing assembly, 13 is the lower magnetic bearing assembly, 2 is the feed assembly, 21 is the guide shaft, 22 is the rotor lifting tool, 3 is the rotor component, and 31 is the magnetic steel. 32 is a carbon fiber sheath, 33 is a thrust plate, 4 is a motor, 5 is a base, 51 is a support frame, 52 is a support plate, 6 is a guide hole tooling, and 7 is a position guide frame;

Figure 2 is a partial enlarged view of the position guide frame in Figure 1;

71 is the frame, 72 is the upper positioning screw, 73 is the lower positioning screw, and 74 is the ball;

3 is a schematic diagram of the structure when the guide shaft starts to enter the guide hole tooling during the assembly process of the present invention;

4 is a schematic diagram of the structure when the rotor magnet begins to enter the host during the assembly process of the present invention;

Figure 5 is a schematic diagram of the structure when the thrust plate starts to enter the position guide frame during the assembly process of the present invention;

Figure 6 is a schematic diagram of the structure of the present invention after assembling.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, a large motor rotor assembly tool includes a main machine 1, a feeding assembly 2, a rotor part 3, a motor 4, a base 5, a guide hole tooling 6 and a position guide frame 7. The main machine 1 is placed on the base 5. The host 1 includes a housing 11, an upper magnetic bearing assembly 12, and a lower magnetic bearing assembly 13. The housing 11 clamps the inverted motor 4, the upper magnetic bearing assembly 12 is fixed on the top of the host 1, and the lower magnetic bearing assembly 13 is fixed on the host 1. Bottom

The main engine 1 is located under the feeding assembly 2. The feeding assembly 2 clamps the rotor part 3. The feeding assembly 2 is used to install the rotor part 3 into the main engine 1; the rotor part 3 includes a magnet 31 and a thrust plate 33; the bottom end of the rotor part 3 A magnetic steel 31 is provided, and the top end of the rotor component 3 is fixedly installed with a thrust plate 33, preferably by means of an interference heating sleeve. The rotor component 3 also includes a carbon fiber sheath 32; the carbon fiber sheath 32 is sleeved on the outer wall of the rotor component 3.

As shown in Fig. 2, the feeding assembly 2 includes a guide shaft 21 and a rotor hoisting tool 22; the guide shaft 21 for guiding the rotor part 3 into the main machine 1 is coaxially fixed to the end of the rotor part 3 close to the magnet 31, and the rotor is hoisted The tool 22 is coaxially fixed on the boss at the top of the rotor;

As shown in FIG. 2, the position guide frame 7 includes a frame 71, an upper positioning screw 72, a lower positioning screw 73 and balls 74. The two ends of the position guide frame 7 are provided with through holes for the rotor part 3 to enter; the frame 71 With threaded holes, the upper positioning screw 72 and the lower positioning screw 73 are movably connected to the frame 71 through the threaded holes, and the inner sides of the upper positioning screw 72 and the lower positioning screw 73 are equipped with balls 74; The outer circle size of the upper end of the rotor part 3 changes. The upper positioning screw 72 and the lower positioning screw 73 are attached to the rotor part 3 during the assembly process of the ball 74. As the outer circle size increases, the upper positioning screw 72 and the lower positioning screw 73 are retracted outward in turn , Used to realize the upper end positioning and guiding effect in the assembly process. The ball 74 is preferably a universal ball.

The bottom end of the main machine 1 is coaxially installed with a guide hole tool 6; the bottom end of the main machine 1 is provided with a mounting hole, and the guide hole tool 6 for positioning and guiding the lower end of the rotor component 3 is inserted into the bottom end of the main machine 1 during the assembly process.

In particular, the base 5 includes a support frame 51 and a support plate 52; the support plate 52 is fixed on the adjustable support frame 51, the support plate 52 is provided with mounting holes, and the guide hole tooling 6 passes through the mounting hole at the bottom of the host 1 and the mounting hole of the support plate 52 It penetrates the bottom end of the host 1 and the support plate 52.

The rotor component 3 also includes a carbon fiber sheath 32; the outer wall of the rotor component 3 is sheathed with a carbon fiber sheath 32. In this solution, the outer wall of the rotor part is covered with carbon fiber tooling, and the position guide frame and the guide hole tooling provide an upper guide device and a lower guide device for the assembly process of the rotor part respectively, so as to solve the problem that the rotor will not be too strong due to magnetic force during the assembly process of the rotor. The problem of being adsorbed on the inner hole of the main machine also realizes the protection of the rotor components during the assembly process.

The use method of a large motor rotor assembly tool of the present invention is as follows:

Step A. Assemble the main machine 1: Install the position guide frame 7 with the positions of the upper positioning screw 72 and the lower positioning screw 73 adjusted on the top of the main machine 1. The position guide frame 7 is used for assembling and positioning the rotor component 3; The guide hole tooling 6 is installed on the end, and the guide hole tooling 6 is used for rotor assembly guide; the bottom end of the main machine 1 is installed with a support plate 52 and then lifted upside down on the support frame 51, and the support plate 52 is used to enlarge the outer circle size of the main machine 1;

Step B. Assemble the feeding assembly 2 on the rotor part 3: Install the rotor lifting tool 22 and the guide shaft 21 on the two ends of the rotor part 3, and use the crane to lift the rotor part 3 and place it above the host 1;

Step C. Assembling the rotor part 3: Operate the crane, and under the control of the upper end positioning guide and the lower end positioning guide of the rotor assembly 3, the rotor part 3 is slowly moved down until the thrust plate 33 is placed on the upper magnetic bearing assembly 12, and the rotor is assembled In place; specifically include: as shown in Figure 3, operate the crane to slowly lower the rotor part 3, the guide shaft 21 enters the host first; continue down, the rotor part 3 begins to enter the position guide frame 7, the upper positioning screw 72 The inner ball 74 of the lower positioning screw 73 is attached to the rotor part 3; the crane is operated to make the rotor part 3 continue downward, and the guide shaft 21 begins to enter the guide hole tooling 6 to realize the positioning and guiding of the lower end of the rotor assembly 3; as shown in Figure 4 When it continues downward, the rotor assembly 3 enters the motor 4; the stator and the rotor generate a large suction force; the outer circumference of the upper end of the rotor assembly 3 is recessed, so that the lower positioning screw 73 of the position guide frame 7 is pulled out under the action of the ball 74. When the upper positioning screw 72 is still attached to the rotor assembly 3 through the balls 74, the upper end of the rotor assembly 3 is positioned and guided; as shown in FIG. 5, after continuing downward, the outer circle of the thrust plate 33 of the rotor assembly 3 enters the position guide frame 7. The upper positioning screw 72 of the position guide frame 7 is all screwed out through the balls 74, so that the thrust plate 33 continues to slide downward without hindrance. At this time, the outer circle of the thrust plate 33 matches the inner hole of the lower end of the position guide frame 7 , Realize the positioning and guiding of the upper end of the rotor component 3, and when the outer circle of the thrust plate 33 continues to slide down through the position guide frame 7, the upper positioning screw 72 and the lower positioning screw 73 can also completely enter the position guide frame 7, without interfering with assembly.

Until the thrust plate 33 is placed on the upper magnetic bearing assembly 12, the rotor is assembled in place, as shown in FIG. 6.

Step D. Remove the tooling to complete the assembly: remove the position guide frame 7 and the guide shaft 21, and the rotor assembly 3 is installed in the host 1 is completed.

In this solution, the upper positioning screw 72 and the lower positioning screw 73 in the position guide frame 7 are sequentially retracted outward, which solves the problem that the outer circle size of the rotor part 3 is constantly changing during the downward assembly process of the rotor part 3, and the guide mechanism is also required. The problem of constant change without disturbing the assembly.

The above are only preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.

Claims

A large motor rotor assembly tool, which is characterized in that it includes a main machine (1), a feeding assembly (2), a rotor component (3), a motor (4), a base (5), a guide hole tooling (6) and a position guide frame (7); The host (1) clamps the inverted motor (4), the host (1) is located between the feeding assembly (2) and the base (5), and the feeding assembly (2) clamps the rotor part (3) , The position guide frame (7) is coaxially fixed at the top of the host (1), the position guide frame (7) is provided with through holes at both ends, the bottom end of the host (1) is provided with mounting holes, and the mounting holes are coaxially installed with guide holes The tooling (6), the position guide frame (7) and the guide hole tooling (6) respectively realize the upper and lower guiding functions of the assembly tooling;

The host (1) includes a housing (11), an upper magnetic bearing assembly (12), and a lower magnetic bearing assembly (13). The housing (11) clamps an inverted motor (4), and the upper magnetic bearing assembly (12) ) Is fixed on the top of the main machine (1), and the lower magnetic bearing assembly (13) is fixed on the bottom of the main machine (1);

The rotor component (3) includes a magnetic steel (31) and a thrust plate (33), the bottom end of the rotor component (3) is provided with a magnetic steel (31), and the top end of the rotor component (3) is fixedly installed with the thrust plate (33) ；

The feeding assembly (2) includes a guide shaft (21) and a rotor hoisting tool (22), and the guide shaft (21) of the guide rotor component (3) installed in the host (1) is coaxially fixed to the rotor component (3) close to the magnetic One end of the steel (31), the rotor lifting fixture (22) is coaxially fixed on the boss at the top of the rotor;

The position guide frame (7) includes a frame (71), an upper positioning screw (72), a lower positioning screw (73) and balls (74). The frame (71) is provided with threaded holes and an upper positioning screw (72) And the lower positioning screw (73) are movably connected with the frame (71) through the threaded hole, the upper positioning screw (72) and the lower positioning screw (73) are equipped with balls (74) inside; the upper positioning screw (72) and the lower positioning screw (73) The ball (74) is always attached to the rotor component (3), which is used to realize the positioning and guidance during the assembly process.
A large motor rotor assembly tool according to claim 1, characterized in that: the base (5) includes a support frame (51) and a support plate (52); the support plate (52) is fixed to the adjustable support On the frame (51), the support plate (52) is provided with mounting holes, and the guide hole tooling (6) passes through the bottom end of the host (1) and the support plate (52) through the bottom end of the host (1) and the support plate (52). ).
A large motor rotor assembly tool according to claim 1, characterized in that: the top end of the rotor component (3) has an interference heating sleeve thrust plate (33).
A large electric motor rotor assembly tool according to claim 1, characterized in that: the rotor component (3) further comprises a carbon fiber sheath (32); the carbon fiber sheath (32) is sleeved on the rotor component (3). ) Outer wall.
The assembly tool for a rotor of a large electric motor according to claim 1, wherein the ball (74) is a universal ball.
According to any one of claims 1 to 5, a method for using a large motor rotor assembly tool, comprising the following steps:

Step A. Assemble the main machine (1): Install the position guide frame (7) with the positions of the upper positioning screw (72) and the lower positioning screw (73) adjusted on the top of the main machine (1); install the bottom end of the main machine (1) Upper guide hole tooling (6); after installing the support plate (52) at the bottom of the main machine (1), it is lifted upside down and placed on the support frame (51);

Step B. Assemble the feeding assembly (2) on the rotor part (3): install the rotor lifting fixture (22) and the guide shaft (21) on both ends of the rotor part (3), and use a crane to move the rotor part (3) Lift it up and place it above the host (1);

Step C. Assemble the rotor component (3): Operate the crane, and under the control of the upper end positioning guide and the lower end positioning guide of the rotor assembly (3), slowly lower the rotor component (3) until the thrust plate (33) is placed on top On the magnetic bearing assembly (12), the rotor is assembled in place;

Step D. Remove the tooling to complete the assembly: remove the position guide frame (7) and the guide shaft (21), and the rotor assembly (3) into the main machine (1) is completed.
The assembly tool for a large electric motor rotor according to claim 6, characterized in that: said step C further comprises:

Step C1. Operate the crane to make the rotor part (3) slowly downwards, the guide shaft (21) enters the main engine first; continue downward, the rotor part (3) starts to enter the position guide frame (7), and the positioning screw (72) ) And the inner ball (74) of the lower positioning screw (73) fit the rotor component (3);

Step C2. Operate the crane to make the rotor component (3) continue downward, and the guide shaft (21) begins to enter the guide hole tooling (6) to realize the positioning and guiding of the lower end of the rotor assembly (3);

Step C3. When continuing downward, the rotor assembly (3) enters the motor (4); the outer circumference of the upper end of the rotor assembly (3) is recessed, so that the lower positioning screw (73) of the position guide (7) acts on the ball (74) The upper positioning screw (72) is still attached to the rotor assembly (3) through the balls (74) to realize the positioning and guiding of the upper end of the rotor assembly (3);

Step C4. After continuing downwards, the outer circle of the thrust plate (33) of the rotor assembly (3) enters the position guide frame (7), and the upper positioning screw (72) of the position guide frame (7) all outwards through the balls (74) Unscrew it so that the thrust plate (33) continues to slide downward without obstruction until the thrust plate (33) is placed on the upper magnetic bearing assembly (12) and the rotor is assembled in place.