JP2884857B2 - Rotor attachment / detachment device for permanent magnet synchronous machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A permanent magnet synchronous machine of this type is used as an electric propulsion synchronous machine for effectively utilizing the space of a submarine or the like. FIG. 4 is a longitudinal sectional view of the permanent magnet synchronous machine. FIG.
, The permanent magnet synchronous machine comprises an armature 1 having a fixed armature winding 7 and a rotor 2 having an even number of permanent magnet field poles 5 attached to 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 off the magnetic flux Φ. In the case of a synchronous generator, when the rotor 2 is rotated by another motor, AC power is generated from an armature winding (not shown). In such a permanent magnet synchronous machine, a magnetic attraction force is generated between the armature 1 and the rotor 2 because the magnetic flux Φ from the field pole is generated even when the operation is stopped.

[0003]

In maintenance and inspection of a permanent magnet synchronous machine, separating the rotor from the armature without demagnetizing the permanent magnet field poles requires a magnetic field between the armature 1 and the rotor 2. It was extremely difficult due to the suction power, and a special drawer was required.

According to the present invention, at the time of maintenance and inspection of a permanent magnet synchronous machine, the magnetic attraction between the armature and the permanent magnet field poles is reduced,
An object of the present invention is to provide a rotor attaching / detaching device for a permanent magnet synchronous machine that facilitates detachment or insertion of the rotor.

[0005]

SUMMARY OF THE INVENTION In a permanent magnet synchronous machine comprising an armature having a fixed armature winding and a rotor having an even number of permanent magnet field poles mounted on the outer peripheral surface of a rotor core. An engaging mechanism comprising an axial groove formed in the rotating shaft of the rotor and a protruding piece that is detachably formed in the groove and protrudes from the stator side is provided, and the armature winding is DC-excited. When the rotor engages the engagement mechanism at a stationary position, restricts the rotation of the rotor, and excites the armature windings with the same polarity as the exciting current, thereby forming The above 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 armature and the rotor.

Further, by providing a plurality of armature upper marks engraved radially on the side surface near the inner diameter of the armature and a rotor upper engraving carved on the side surface near the outer diameter of the rotor, This is suitable for matching the polarity of the winding with the polarity of the rotor.

An armature having a fixed armature winding;
In a permanent magnet synchronous machine including a rotor having an even number of permanent magnet field poles attached to the outer peripheral surface of a rotor core,
An axial groove formed in the rotating shaft of the rotor, and a meshing mechanism comprising a releasably configured protruding piece protruding from the stator side provided in the groove, when the armature winding is DC-excited. Engaging the engagement mechanism at a position where the rotor is rotated by one pole from a position where the rotor is stationary, restrains rotation of the rotor, and reverses the armature winding with the exciting current. The above-described 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 armature and the rotor by DC excitation to a polarity. To achieve.

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

[0009]

When the engagement mechanism is engaged at a position where the rotor is stationary when the armature winding is DC-excited, the polarity of the armature winding and the polarity of the rotor are attracted to each other with opposite polarities. 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 become the same, and the armature and the rotor repel each other. Since a force is generated, the rotor can be easily pulled out in the axial direction via the engagement mechanism, or the rotor can be inserted into the electric machine.

[0010] By providing a plurality of radially inscribed marks on the armature near the inner diameter of the armature and an upper mark on the rotor near the outer diameter of the rotor, the armature can be provided. At the position where the rotor is stationary when DC excitation is applied to the winding, the engraving on the armature opposite to the engraving on the rotor can be confirmed. At this position, the engagement mechanism is engaged to restrict the rotation of the rotor, and when the armature winding is DC-excited so as to have the opposite polarity to the previous excitation current, the polarity of the armature winding and the polarity of the rotor become Have the same polarity and generate repulsive forces.

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 the armature. Becomes In this state, the engagement mechanism is engaged to restrict 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 opposed thereto are changed. Have the same polarity, and the armature and the rotor generate repulsive forces with each other. Therefore, the rotor can be easily pulled out in the axial direction via the engagement mechanism, or the rotor can be inserted into the armature.

[0012] By providing a plurality of radially inscribed marks on the armature near the inner diameter of the armature and a radially inscribed mark on the side near the outer diameter of the rotor, At the position where the rotor is stationary when DC excitation is applied to the winding, the engraving on the armature opposite to the engraving on the rotor can be confirmed. At this position, the rotor is rotated by one pole, the meshing mechanism is engaged, the rotation of the rotor is restrained, and DC excitation is performed to the same polarity as the exciting current, the polarity of the armature winding and the polarity of the rotor Have the same polarity and generate repulsive forces.

[0013]

EXAMPLE 1 FIG. 1 is a longitudinal sectional view of a permanent magnet generator showing a first embodiment of the present invention, FIG 2 is a perspective view of the engagement mechanism FIG. In FIG. 1, the same parts as those in FIG. 3 are denoted 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 attached to the outer peripheral surface of the rotor core 4 to protect the permanent magnet field poles 5. Protective binding 6 is wound. The rotor attaching / detaching device according to the first embodiment of the present invention includes an axial groove 12 formed in a rotating shaft, and a projecting piece 13 which is detachably formed in the groove 12 and protrudes from the stator side. An engagement mechanism 11 was provided. Further, a plurality of armature upper inscriptions 10 radially inscribed on the side surface near the inner diameter of the armature 1,
A rotor upper engraving 9 was provided on the side surface near the outer diameter of the rotor.

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 the magnetic field 8 is indicated by an arrow 14, and the polarity of the permanent magnet field pole 5 is indicated by an arrow 14. Indicated by arrow 15. When the armature winding 7 is DC-excited, the rotor 2 stops at a position where the polarity 14 of the armature winding 7 and the polarity 15 of the rotor 2 are opposite. At a position where the rotor 2 is stationary, the engagement mechanism 11 is engaged to restrict the rotation of the rotor 2. If the armature winding 7 is DC-excited to a polarity opposite to the exciting current previously excited, the polarity
And the polarity 15 of the permanent magnet field pole 5 becomes the same polarity. 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 of the armature 1. When the rotor 2 is inserted into the armature 1 after the maintenance and inspection, the rotor upper engraving 9 when the rotor 2 is pulled out and the opposing armature upper engraving 10 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 DC excitation of the armature winding 7 and the polarity 15 of the permanent magnet field pole 5
Have the same polarity as each other and generate repulsive forces. In this state, the engagement mechanism 11 is engaged to move the rotor 2 in the axial direction.

Embodiment 2 FIG. 3 is a longitudinal sectional view of a permanent magnet generator according to a second embodiment of the present invention. 3, the same parts as those in FIG. 1 are denoted by the same reference numerals. A rotor attaching / detaching device according to a second embodiment of the present invention has an axial groove 12 formed in the rotating shaft 3 similarly to FIG. 2, and is configured to be detachable from the groove 12 and protrudes from the stator side. Engaging mechanism 11 composed of projecting piece 13
Was provided. Further, a plurality of upper armature stamps 10 engraved radially on the side surface near the inner diameter of the armature 1 and an upper rotor stamp 9 engraved on the side surface near the outer diameter of the rotor are provided.

When the armature winding 7 is DC-excited, the rotor 2 stops at a position where the polarity 14 of the armature winding 7 and the polarity 15 of the rotor 2 are opposite. The rotor 2 is rotated by one pole from the position where the rotor 2 is at rest, and the engagement mechanism 11 is engaged at the position where the upper engraved stamp 9 and the upper engraved armature 10 face each other to restrict the rotation of the rotor 2. . If the armature winding 7 is DC-excited to the same polarity as the exciting current previously excited, the armature winding 7
14 due to DC excitation and polarity 1 of permanent magnet field pole 5
5 have the same polarity as each other and generate repulsive forces. 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 of the armature 1. When the maintenance and inspection are completed and the rotor 2 is inserted into the armature 1, the operation is performed in the reverse order of the operation when the rotor 2 is pulled out.

[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 engagement mechanism is engaged in this state. The rotor is moved in the axial direction while restricting the rotation of the rotor, so that the armature and the rotor do not attract each other, and the rotor can be easily pulled out or inserted, reducing work time. it can. In addition, the use of the inscribed mark on the armature and the inscribed mark on the rotor serves as a guide in making the polarity of the armature winding and the polarity of the rotor the same, thereby improving the efficiency of maintenance and inspection.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a permanent magnet synchronous machine according to a first embodiment of the present invention.

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

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

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

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Armature 2 Rotor 3 Rotating shaft 4 Rotor core 5 Permanent magnet field pole 7 Armature winding 9 Mark on rotor 10 Mark on armature 11 Meshing mechanism 12 Groove 13 Projection piece 14 By DC excitation of armature winding Polarity 15 Polarity of permanent magnet field pole

Claims (4)

(57) [Claims] An armature having a fixed armature winding;
In a permanent magnet synchronous machine including a rotor having an even number of permanent magnet field poles attached to the outer peripheral surface of a rotor core,
An axial groove formed in the rotating shaft of the rotor, and a meshing mechanism comprising a releasably configured protruding piece protruding from the stator side provided in the groove, when the armature winding is DC-excited. Engaging the engagement mechanism at a position where the rotor is at rest, restricting the rotation of the rotor, and exciting the armature winding with a direct current having the same polarity as the exciting current, so that the armature and the armature A rotor attachment / detachment device for a permanent magnet synchronous machine, wherein the rotor is pulled out from the armature or the rotor is inserted into the armature while generating a repulsive force between the rotor and the rotor. 2. A rotor mounting / removing device for a permanent magnet synchronous machine according to claim 1, wherein a plurality of armature upper marks engraved radially on a side surface near an inner diameter of the armature and a plurality of engraving marks on an outer diameter near the outer diameter of the rotor. A rotor attachment / detachment device for a permanent magnet synchronous machine, comprising: a rotor upper stamp engraved on a side surface. 3. An armature having a fixed armature winding;
In a permanent magnet synchronous machine including a rotor having an even number of permanent magnet field poles attached to the outer peripheral surface of a rotor core,
An axial groove formed in the rotating shaft of the rotor, and a meshing mechanism comprising a releasably configured protruding piece protruding from the stator side provided in the groove, when the armature winding is DC-excited. Engaging the engagement mechanism at a position where the rotor is rotated by one pole from a position where the rotor is stationary, restrains rotation of the rotor, and reverses the armature winding with the exciting current. It is characterized in that the rotor is pulled out of the armature or a rotor is inserted into the armature while generating a repulsive force between the armature and the rotor by DC excitation to a polarity. Rotor attachment / detachment device for permanent magnet synchronous machines. 4. A rotor attaching / detaching apparatus for a permanent magnet synchronous machine according to claim 3, wherein a plurality of armature upper marks engraved radially on a side surface near the inner diameter of the armature, and a plurality of engraving marks on the side surface near the outer diameter of the rotor. A rotor attachment / detachment device for a permanent magnet synchronous machine, comprising: a rotor upper stamp engraved on a side surface.