JPH05111207A - Mounting/removing apparatus for rotor of permanent magnet synchronous machine - Google Patents

Abstract

PURPOSE:To facilitate the drawing and inserting of a rotor, by relaxing the magnetic attraction force generated between an armature and field system magnetic poles comprising permanent magnets, when performing the maintenance and inspection of a permanent magnet synchronous machine. CONSTITUTION:Provided is an engaging mechanism 11 comprising a groove 12, which is dug in a rotational shaft 3 of a rotor 2 in its axial direction, and a protruding piece 13, which is engaged with the groove 12 removably and protrudes from the side of a stator. When exciting an armature winding 7 with a DC current, at the location of the rotor stopping, the groove 12 and the protruding piece 13 of the engaging mechanism 11 are engaged with each other. Then, by exciting the armature winding 7 with the DC current having the same polarity as the previous exciting current, a repulsion force is generated between an armature 1 and the rotor 2, and the rotor 2 is moved via the engaging mechanism 11. Thereby, the rotor 2 can be drawn out easily from the armature 1 or be inserted easily into it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor attaching / detaching device for facilitating attachment / detachment of a rotor in a permanent magnet synchronous machine.

[0002]

2. Description of the Related Art This type of permanent magnet synchronous machine is used as an electric propulsion synchronous machine for effectively utilizing the space of a submarine or the like. FIG. 4 is a vertical sectional view of the permanent magnet synchronous machine. Figure 4
In, the permanent magnet synchronous machine is composed of an armature 1 having a fixed armature winding 7 and a rotor 2 having an even number of permanent magnet field poles 5 mounted on the outer peripheral surface of a rotor core 4. .. When the permanent magnet synchronous machine is operated, for example, in the case of a synchronous motor, when AC power is supplied to the armature winding 7, the rotor 2 rotates while cutting the magnetic flux Φ. In the case of the synchronous generator, when the rotor 2 is rotated by another prime mover, AC power is generated from the armature winding (not shown). In such a permanent magnet synchronous machine, the magnetic flux Φ from the field pole is generated even when the operation is stopped, so that a magnetic attraction force is generated between the armature 1 and the rotor 2.

[0003]

During maintenance and inspection of the permanent magnet synchronous machine, it is necessary to separate the rotor from the armature without demagnetizing the permanent magnet field poles so that the magnetic field between the armature 1 and the rotor 2 may be reduced. It was extremely difficult due to the suction power, and a special drawing device was required.

This invention alleviates the magnetic attraction force between the armature and the permanent magnet field pole during maintenance and inspection of the permanent magnet synchronous machine,
An object of the present invention is to provide a rotor attaching / detaching device of a permanent magnet synchronous machine in which the rotor can be easily separated or inserted.

[0005]

A permanent magnet synchronous machine comprising an armature having fixed armature windings and a rotor having an even number of permanent magnet field poles mounted on the outer peripheral surface of a rotor core. , An axial groove formed in the rotary shaft of the rotor, and a meshing mechanism including a detachable protrusion protruding from the stator side in the groove, and the armature winding is DC-excited. At this time, the engagement mechanism is engaged at a position where the rotor is stationary, the rotation of the rotor is restricted, and the armature winding is DC-excited to have the same polarity as the exciting current. The object is achieved by pulling out the rotor from the armature or inserting the rotor into the armature while generating a repulsive force between the rotor and the rotor.

Further, if a plurality of armature engraved marks radially engraved on the side surface near the inner diameter of the armature and a rotor upper engraved mark engraved on the side surface near the outer diameter of the rotor are provided. It is suitable for matching the polarity of the winding and the polarity of the rotor.

An armature having a fixed armature winding;
In a permanent magnet synchronous machine consisting of a rotor having an even number of permanent magnet field poles attached to the outer peripheral surface of the rotor core,
When the armature winding is DC-excited, an engaging mechanism is provided which includes an axial groove formed in the rotary shaft of the rotor and a projecting piece that is detachably arranged in the groove and protrudes from the stator side. , Engaging the interlocking mechanism at a position where the rotor is rotated by one pole from a position where the rotor is stationary to restrain the rotation of the rotor and reverse the armature winding from the exciting current. The above object is obtained by exciting the rotor from the armature or inserting the rotor into the armature while generating a repulsive force between the armature and the rotor by direct-current excitation in polarity. To achieve.

If a plurality of armature engraved marks radially engraved on the side surface near the inner diameter of the armature and a rotor upper engraved mark engraved on the side surface near the outer diameter of the rotor are provided. It is suitable for matching the polarity of the winding and the polarity of the rotor.

[0009]

When the rotor is stationary when the armature winding is DC-excited, when the engaging mechanism is engaged, the polarities of the armature winding and the rotor are opposite to each other and the two attract each other. Become. In this state, if the armature winding is DC-excited to the same polarity as the previous exciting current, the polarity of the rotor and the polarity of the armature winding facing it will be the same, and the armature and rotor will repel each other. Since a force is generated, the rotor can be easily pulled out in the axial direction or inserted into the electric machine via the engagement mechanism.

If a plurality of armature engraved marks radially engraved on the side surface near the inner diameter of the armature and a rotor upper engraved mark engraved on the side surface near the outer diameter of the rotor are provided. The mark on the armature opposite to the mark on the rotor can be confirmed at the position where the rotor is stationary when the winding is DC-excited. When the armature winding is DC-excited so that the rotation of the rotor is restricted by engaging the meshing mechanism at this position and the polarity is opposite to the previous exciting current, the polarity of the armature winding and the polarity of the rotor are Have the same polarity and generate repulsive forces with each other.

When the rotor is rotated by one pole from the position where the rotor is stationary when the armature winding is DC-excited, the polarity of the armature winding is the same as the polarity of the rotor facing this armature. Becomes In this state, the meshing mechanism is engaged to restrain the rotation of the rotor, and when the armature winding is DC-excited to the same polarity as the previous excitation current, the polarity of the rotor and the polarity of the armature winding facing it will be Have the same polarity, and the armature and the rotor generate a repulsive force to each other, so that the rotor can be easily pulled out in the axial direction or inserted into the armature via the interlocking mechanism.

If a plurality of radial markings on the armature near the inner diameter of the armature and a plurality of markings on the rotor near the outer diameter of the rotor are provided, the armature can be provided. The mark on the armature opposite to the mark on the rotor can be confirmed at the position where the rotor is stationary when the winding is DC-excited. When the rotor is rotated by one pole at this position, the engagement mechanism is engaged to restrain the rotation of the rotor, and DC excitation is performed with the same polarity as the previous excitation current, the polarity of the armature winding and the polarity of the rotor And have the same polarity and generate repulsive force with each other.

[0013]

Embodiment 1 FIG. 1 is a vertical sectional view of a permanent magnet generator showing a first embodiment of the present invention, and FIG. 2 is a perspective view of the engaging mechanism of FIG. 1, the same parts as those in FIG. 3 are designated by the same reference numerals. The permanent magnet synchronous machine includes an armature 1 having a fixed armature winding 7, and an even number of permanent magnet field poles 5 mounted on the outer peripheral surface of a rotor core 4 to protect the permanent magnet field poles 5. In order to do so, the protective bind 6 is wound. The rotor attachment / detachment device according to the first embodiment of the present invention comprises an axial groove 12 formed in the rotary shaft, and a protruding piece 13 detachably attached to the groove 12 and protruding from the stator side. The engaging mechanism 11 is provided. Furthermore, a plurality of armature upper engraved marks 10 radially engraved on the side surface near the inner diameter of the armature 1,
On the side surface of the rotor near the outer diameter, a rotor upper marking 9 was provided.

When the armature winding 7 is DC-excited, a magnetic field 8 is generated from the armature winding 7. The polarity of the armature winding 7 due to this magnetic field 8 is indicated by an arrow 14, and the polarity of the permanent magnet field pole 5 is shown. Shown by arrow 15. When the armature winding 7 is DC-excited, the rotor 2 stands still at a position where the polarity 14 of the armature winding 7 and the polarity 15 of the rotor 2 are opposite polarities. The engagement mechanism 11 is engaged at the position where the rotor 2 is stationary to restrain the rotation of the rotor 2. If the armature winding 7 is DC-excited with a polarity opposite to that of the previously excited excitation current, the polarity 14 due to the DC excitation of the armature winding 7
And the polarities 15 of the permanent magnet field poles 5 are the same, and the rotor 2 is axially moved through the meshing mechanism 11 in such a state to pull out the rotor 2 from the armature 1. When the rotor 2 is inserted into the armature 1 after the maintenance and inspection, the rotor upper marking 9 when the rotor 2 is pulled out and the armature upper marking 10 facing the rotor 2 are aligned with the same polarity as when the rotor 2 is pulled out. When the armature winding 7 is excited, the polarity 14 due to the DC excitation of the armature winding 7 and the polarity 15 of the permanent magnet field pole 5
And have the same polarity and generate repulsive force with each other. In this state, the engagement mechanism 11 is engaged to move the rotor 2 in the axial direction.

Embodiment 2 FIG. 3 is a vertical sectional view of a permanent magnet generator showing a second embodiment of the present invention. 3, the same parts as those in FIG. 1 are designated by the same reference numerals. The rotor attachment / detachment device according to the second embodiment of the present invention has an axial groove 12 formed in the rotary shaft 3 as in FIG. 2, and is detachably attached to the groove 12 and protrudes from the stator side. Engagement mechanism 11 including protruding piece 13
Was established. Further, a plurality of armature upper markings 10 radially engraved on the side surface near the inner diameter of the armature 1 and a rotor upper marking 9 carved on the side surface near the outer diameter of the rotor are provided.

When the armature winding 7 is DC-excited, the rotor 2 stands still at a position where the polarity 14 of the armature winding 7 and the polarity 15 of the rotor 2 are opposite polarities. The rotor 2 is rotated by one pole from the position where the rotor 2 is stationary, and the engagement mechanism 11 is engaged at the position where the rotor upper marking 9 and the armature upper marking 10 face each other to restrain the rotation of the rotor 2. .. If the armature winding 7 is DC-excited to the same polarity as the exciting current that was previously excited, the armature winding 7
Polarity 14 due to DC excitation and permanent magnet field pole 5 polarity 1
It has the same polarity as that of 5, and repulsive force is generated between them. In such a state, the rotor 2 is moved in the axial direction via the engagement mechanism 11, and the rotor 2 is pulled out from the armature 1. When the maintenance work is completed and the rotor 2 is inserted into the armature 1, the work is performed in the reverse order of the pull-out operation.

[0017]

According to the present invention, when the armature winding is DC-excited, the magnetic field generated by the armature and the magnetic field of the rotor generate repulsive forces, and the meshing mechanism is engaged in this state. Since the rotor is moved in the axial direction while restraining the rotation of the rotor, the armature and the rotor do not attract, and the rotor can be easily pulled out or inserted, which shortens the work time. it can. If the marking on the armature and the marking on the rotor are used, the polarity of the armature winding and the polarity of the rotor can be made the same, and the efficiency of maintenance and inspection can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a permanent magnet synchronous machine showing a first embodiment of the present invention.

2 is a perspective view of the engagement mechanism of FIG. 1. FIG.

FIG. 3 is a vertical sectional view of a permanent magnet synchronous machine according to a second embodiment of the present invention.

FIG. 4 is a vertical sectional view of a permanent magnet synchronous machine.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 1 Armature 2 Rotor 3 Rotation axis 4 Rotor iron core 5 Permanent magnet field pole 7 Armature winding 9 Engraved on rotor 10 Engraved on armature 11 Engagement mechanism 12 Groove 13 Protruding piece 14 By DC excitation of armature winding Polarity 15 Polarity of permanent magnet field pole

Claims (4)

[Claims] 1. An armature having a fixed armature winding,
In a permanent magnet synchronous machine consisting of a rotor having an even number of permanent magnet field poles attached to the outer peripheral surface of the rotor core,
When the armature winding is DC-excited, an engaging mechanism is provided which includes an axial groove formed in the rotary shaft of the rotor and a projecting piece that is detachably arranged in the groove and protrudes from the stator side. , Engaging the interlocking mechanism at a position where the rotor is stationary, restraining the rotation of the rotor, and DC-exciting the armature winding to the same polarity as the exciting current, thereby making the armature and the A rotor attaching / detaching device for a permanent magnet synchronous machine, wherein the rotor is pulled out of the armature or the rotor is inserted into the armature while generating a repulsive force between the rotor and the rotor. 2. The rotor attachment / detachment device for a permanent magnet synchronous machine according to claim 1, wherein a plurality of armature markings radially engraved on a side surface near the inner diameter of the armature and near the outer diameter of the rotor are provided. A rotor attaching / detaching device for a permanent magnet synchronous machine, characterized in that a rotor engraved on the side surface is provided. 3. An armature having a fixed armature winding,
In a permanent magnet synchronous machine consisting of a rotor having an even number of permanent magnet field poles attached to the outer peripheral surface of the rotor core,
When the armature winding is DC-excited, an engaging mechanism is provided which includes an axial groove formed in the rotary shaft of the rotor and a projecting piece that is detachably arranged in the groove and protrudes from the stator side. , Engaging the interlocking mechanism at a position where the rotor is rotated by one pole from a position where the rotor is stationary to restrain the rotation of the rotor and reverse the armature winding from the exciting current. Direct-current excitation in a polarity, pulling out the rotor from the armature while generating repulsive force between the armature and the rotor, or inserting the rotor into the armature, A permanent magnet synchronous machine rotor attachment / detachment device. 4. The rotor attachment / detachment device for a permanent magnet synchronous machine according to claim 3, wherein a plurality of armature markings radially engraved on the side surface near the inner diameter of the armature and near the outer diameter of the rotor. A rotor attaching / detaching device for a permanent magnet synchronous machine, characterized in that a rotor engraved on the side surface is provided.