JPH08168215A - Magnet mounting equipment of permanent synchronous motor - Google Patents

Abstract

PURPOSE: To provide a magnet installing equipment which can shorten the time to install a magnet piece to a rotor center in a permanent magnet synchronous motor. CONSTITUTION: In a magnet installing equipment which consists of a jig plate 3 which is installed at an end of a rotor center 1, a feed screw guide 5, and a stud 7, the feed screw guide 5 is separated into upper and lower parts at a face which passes through the center of a screw hole 7a and can be assembled and disassembled easily by means of bolts 9. The feed screw guide 5 is disassembled and magnet pieces 2 are moved to a place near a specified one on the rotor center. When the magnet pieces 2 come close to the magnet installing equipment, the feed screw guide 5 is assembled and the stud 7 is turned and then the magnet pieces 2 are pushed into a specified place. By this method, the installation time of the magnet pieces 2 can be remarkably shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet mounting device for mounting a magnet piece on a rotor center of a permanent magnet synchronous motor.

[0002]

2. Description of the Related Art A permanent magnet synchronous motor is a stator in which a stator winding having a plurality of phases is wound around a substantially annular stator core, and an outer diameter of a rotor core which is concentric with the inner peripheral surface of the stator. And a rotor provided with permanent magnets that are alternately magnetized for each magnetic pole. When the permanent magnet synchronous motor is of the rotating field type, the permanent magnet serving as a field pole must be fixed to the rotor center. Since there is a limit to the size of a single permanent magnet that can be manufactured at present and large ones cannot be made, in the case of a large machine, magnetic poles are formed by arranging small magnet pieces in the axial direction. Due to the attraction force with the center and the repulsive force with the adjacent magnet piece, there is a force when moving the magnet piece to a fixed position.

FIG. 2A is a vertical sectional view showing a state in which a conventional magnet mounting device is mounted on a rotor center, and FIG. 2B is a sectional view taken along the line BB of FIG. The magnet mounting device is
It comprises a jig plate 3, a feed screw guide 5, bolts 6, studs 7 and a handle 8. In FIG. 2, the jig plate 3 is attached to the rotor center 1 by the bolts 4.
Then, the feed screw guide 5 is attached to the jig plate 3 with the bolt 6, and the stud 7 rotated by the handle 8 is fitted to the feed screw guide 5. The magnet piece 2 which is a permanent magnet is placed on the end of the rotor center 1, and the handle 8 is rotated to contact the magnet piece 2 of the stud 7 and fed in the axial direction to arrange the magnet piece 2 in the axial direction. The magnet piece 2 is screwed to the rotor center 1 at two locations in the axial direction. Figure 2
In the case of (B), an example in which the N pole or the S pole is configured by the magnet pieces 2 in three rows is shown. To attach the magnet piece 2,
First, guide the magnet pieces 2 in the central portion of the three rows in the axial direction by the studs 7 and arrange them on the rotor center 1, then feed the magnets on the left and right sides respectively by the studs 7 and arrange the magnet pieces 2 in three rows. Arranged to form one magnetic pole. Next, loosen the bolts 4 to remove the jig plate 3 from the rotor center 1, shift the rotor center 1 in the circumferential direction, and then attach the jig plate 3 to the adjacent magnetic pole with the bolts 4. The piece 2 is attached to the surface of the rotor center 1.

[0004]

In the conventional magnetic pole attaching apparatus, the stud 7 is rotated to move the magnet pieces 2 one by one in the axial direction, so that it takes time to attach the magnet pieces. When the number of magnet pieces 2 is large, the increase in the required time is remarkable.

An object of the present invention is to provide a magnet mounting device which shortens the mounting time of the magnet piece to the rotor center.

[0006]

Means for Solving the Problems A jig plate to be mounted on an end of a rotor center of a permanent magnet synchronous motor, a feed screw guide to be mounted on the jig plate, and a rod-shaped screw hole for the feed screw guide. In a magnet mounting device that is formed with a stud having a screw to be fitted and has a handle at its end, and that moves a plurality of magnet pieces constituting the permanent magnet in the axial direction, a surface through which the feed screw guide passes through the center of the screw hole. It is divided into upper and lower parts by means of bolts so that they can be joined or disassembled by bolts, the feed screw guide is disassembled, and the magnet pieces are axially moved to the vicinity of a predetermined position on the rotor center by the studs. When approaching, the feed screw guide is coupled, the stud is fitted into the screw hole, and the magnet piece is pushed to a predetermined position, To achieve the target.

[0007]

In the present invention, the feed screw guide is divided into upper and lower parts, and is constructed so that it can be joined or disassembled by bolts. The repulsive force works when the magnetic pole pieces move toward each other in the direction, so that the feed screw guide is coupled, the stud is fitted in the screw hole, and the magnetic pole piece is moved to the predetermined position against the repulsive force of the magnetic pole piece. Therefore, the distance to be pushed in by the stud becomes shorter than in the past, and the time required for attaching the pole piece can be shortened.

[0008]

1 (A) is a longitudinal sectional view showing a state in which a magnet mounting apparatus according to an embodiment of the present invention is mounted on a rotor center, and FIG. 1 (B) is a sectional view taken along the line BB of FIG. In FIG. 1, the same parts as those in FIG. In the present invention, the feed screw guide 5 is divided into upper and lower parts on the plane passing through the center of the screw hole, and can be connected or disassembled by the bolt 9. When attaching the magnet piece 2 to the rotor center 1, the jig plate 3 is attached to the rotor center 1.
Then, the feed screw guide 5 is attached to the jig plate 3. Since the attraction force between the magnet piece 2 and the rotor center 1 is weak, the magnet piece 2 is placed on the end of the rotor center 1 and the stud 7 moves the magnet piece 2 to a predetermined axial position.
When the magnet pieces 2 approach each other and the repulsive force becomes stronger between them, the bolt 9 is loosened to connect the feed screw guide 5, the stud 7 is fitted into the screw hole 7a, and the handle 8
Then, the stud 7 is rotated to push the magnet piece 2 to a predetermined position. Since the stud 7 is rotated and pushed in by the handle only when the magnet pieces 2 approach each other in this way, the mounting time of the magnet pieces 2 can be greatly reduced. Thereafter, the same operation is repeated to arrange the magnet pieces 2 in the axial direction. The example in Figure 1
It is configured by arranging three rows of magnet pieces 2 per pole in the axial direction.

[0009]

According to the present invention, the feed screw guide for screw-connecting the stud is divided into upper and lower parts on the plane passing through the center of the screw hole, and first the feed screw guide is disassembled to place the magnet piece on the rotor center by the stud. When the magnet pieces move to the specified position and the repulsive force becomes stronger as the magnet pieces approach each other, the feed screw guide is connected and the magnet piece is pushed in to the specified position by the lid, so the time required for magnet installation is shorter than in the past. It can be greatly shortened. This effect becomes more remarkable as the number of magnet pieces increases in a large rotating machine.

[Brief description of drawings]

FIG. 1A is a longitudinal sectional view showing a state in which a magnet mounting device according to an embodiment of the present invention is mounted on a rotor center;
(B) is a BB sectional arrow view of (A).

2A is a vertical cross-sectional view showing a state in which a conventional magnet mounting device is mounted on a rotor center, and FIG. 2B is B of FIG.
It is a B cross-section arrow view.

[Explanation of symbols]

 1 Rotor Center 2 Magnet Piece 3 Jig Plate 5 Feed Screw Guide 7 Stud 8 Handle 9 Bolt

Claims (1)

[Claims] 1. A jig plate mounted on an end portion of a rotor center of a permanent magnet synchronous motor, a feed screw guide mounted on the jig plate, and a rod-shaped screw engaging with a screw hole of the feed screw guide. In a magnet mounting device that is engraved and has a stud with a handle at the end, and that moves a plurality of magnet pieces that constitute the permanent magnet in the axial direction, divide the feed screw guide into upper and lower parts with a plane passing through the center of the screw hole. Then
It can be connected or disassembled by bolts, and the feed screw guide is disassembled to move the magnet piece axially to the vicinity of a predetermined position on the rotor center by the stud, and the feed screw when the magnet pieces approach each other. Connect the guide and fit the stud into the screw hole,
A magnet mounting device for a permanent magnet synchronous motor, characterized in that the magnet piece is pushed to a predetermined position.