JP2015154581A - Rotor including divided rotor core - Google Patents

Abstract

An object of the present invention is to highly accurately and easily adjust the arrangement position of a split-type rotor core. A non-magnetic ring member 15 disposed on an outer peripheral surface of a split-type rotor core 11, and disposed between an inner peripheral surface of the split-type rotor core 11 and an outer peripheral surface of a shaft 12, and is divided. A rotor 10 having a split-type rotor core provided with a non-magnetic friction type fastener 14 capable of pressing the rotor core 11 against the ring member 15 enables highly accurate and simple positioning of the split-type rotor core. It is possible to adjust. [Selection] Figure 2

Description

  The present invention relates to a rotor having a split rotor core using a permanent magnet as a field source.

  In a rotating electrical machine, there is a method of using a rotor core (hereinafter referred to as a divided rotor core) divided into rotors as a method of suppressing magnetic flux leakage generated from a permanent magnet disposed in the rotor core and improving the characteristics of the motor. If the split rotor core is used, magnetic flux leakage can be largely prevented and the effective magnetic flux increases, so that the motor torque is improved.

  FIG. 4 is a schematic view showing an example of a rotor having a conventional rotor core that is not divided (hereinafter referred to as an integrated rotor core). The rotor 20 having an integrated rotor core shown in the figure includes an shaft 12, a magnet 13, and an integrated rotor core 21, and has an 8-pole rotor structure in which eight magnets 13 are equally arranged in a spoke shape on the integrated rotor core 21. is there. The shaft 12 is disposed inside the integral rotor core 21.

  In the rotor 20 having an integral rotor core, magnetic flux leakage from the magnet 13 occurs as shown in FIG. However, the use of the split rotor core has the advantage that the magnetic flux leakage is reduced and the motor torque is improved.

JP 2011-78298 A

  When assembling a split-type rotor core, be careful not to cause variations in the gap between the split-type rotor core in which permanent magnets are equally arranged in the form of spokes and the stator disposed outside the split-type rotor core. Must. For this reason, it is necessary to fix the outer peripheral surfaces of the split-type rotor cores so that they are located on the same circumference, and at this time, the arrangement position of the split-type rotor core must be adjusted with high accuracy. Therefore, there is a problem that the number of assembling steps increases and is not suitable for mass production.

  Patent Document 1 discloses a technique in which the magnetization direction is alternately directed to the outer peripheral side and the inner peripheral side of the shaft and arranged in the circumferential direction of the shaft (the circumferential direction of the rotor) inside the split rotor core. However, this technique also has a problem that it is necessary to adjust the arrangement position of the split-type rotor core with high accuracy, which increases the number of assembly steps and is not suitable for mass production.

  Accordingly, an object of the present invention is to provide a rotor having a split-type rotor core that enables easy adjustment of the placement position of the split-type rotor core with high accuracy.

A rotor having a split-type rotor core according to the first invention for solving the above-mentioned problems is as follows.
An annular ring member disposed on the outer peripheral surface of the split-type rotor core and made of a non-magnetic material;
Disposed between an inner peripheral surface of the split-type rotor core and an outer peripheral surface of a shaft disposed inside the split-type rotor core, and enables the split-type rotor core to be pressed against the ring member; And a friction type fastener made of a non-magnetic material.

A rotor having a split-type rotor core according to a second invention for solving the above-mentioned problems is as follows.
In the rotor having the split rotor core according to the first invention,
The friction fastener is
An annular inner ring disposed on the outer peripheral surface of the shaft and having a tapered surface from the center to both ends in the axial direction;
An annular outer ring disposed on the inner peripheral surface of the split rotor core and having a tapered surface from the center to both ends in the axial direction;
Between the inner ring and the outer ring, a plurality of axisymmetrically arranged bolts each facing the axial direction,
Each outer peripheral surface is a tapered surface slidable with respect to the inner ring and the outer ring, and each inner peripheral surface is fitted with each of the bolts, a plurality of first tapered rings,
The first taper ring is opposed to the first taper in the axial direction, each outer peripheral surface is a slidable taper surface with respect to the inner ring and the outer ring, and each inner peripheral surface is fitted to each bolt. And a plurality of second taperings.

A rotor having a split-type rotor core according to a third invention for solving the above-described problems is
In the rotor having the split rotor core according to the first or second invention,
The ring member is made of carbon fiber reinforced plastic.

  According to the rotor having the split rotor core according to the present invention, it is possible to adjust the placement position of the split rotor core with high accuracy and simplicity.

It is the schematic showing only the shaft, split-type rotor core, and magnet in Example 1 of this invention. It is the schematic of the rotor which has a split-type rotor core which concerns on Example 1 of this invention. It is AA sectional drawing of FIG. It is the schematic of the rotor which has an integrated rotor.

  Hereinafter, a rotor having a split rotor core according to the present invention will be described with reference to the drawings by way of examples.

[Example 1]
A configuration of a rotor having a split rotor core according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating only a shaft, a split rotor core, and a magnet in Embodiment 1 of the present invention. FIG. 2 is a schematic view of a rotor having a split rotor core according to the first embodiment of the present invention. 3 is a cross-sectional view taken along the line AA in FIG. Hereinafter, the same number is attached | subjected to the structure same as a prior art.

  A rotor having a split rotor core according to the first embodiment of the present invention (hereinafter referred to as a rotor 10 having a split rotor core) includes a split rotor core 11, a shaft 12, and a magnet 13 as shown in FIG. ing. The magnets 13 are spoke-arranged in each of the split-type rotor cores 11, and the shaft 12 is provided inside the split-type rotor core 11.

  However, in the state of FIG. 1, since the split rotor core 11 is not fixed, the respective positions of the split rotor core 11 cannot be adjusted.

  Therefore, as shown in FIG. 2, the rotor 10 having the split rotor core is further provided with a frictional fastener 14 and a ring member 15 in addition to the above configuration.

  The ring member 15 is an annular member made of a nonmagnetic material such as CFRP (hereinafter referred to as carbon fiber reinforced plastic), and is disposed on the outer peripheral surface of the split rotor core 11.

  The friction fastener 14 is made of a nonmagnetic material such as aluminum, and is disposed between the inner peripheral surface of the split rotor core 11 and the outer peripheral surface of the shaft 12, and presses the split rotor core 11 against the ring member 15. It is possible to do. As shown in FIG. 3, the frictional fastener 14 includes a bolt 16, an inner ring 17, an outer ring 18, a first taper ring 19a, and a second taper ring 19b.

  The inner ring 17 is disposed on the outer peripheral surface of the shaft 12 and has an annular shape having a tapered surface whose outer diameter increases from the center to both ends in the axial direction.

  The outer ring 18 is disposed on the inner peripheral surface of the split-type rotor core 11 and has an annular shape having a tapered surface whose outer diameter is increased from the center to both ends in the axial direction.

  As shown in FIG. 2, a plurality of bolts 16 are arranged symmetrically with respect to the axis, and face in the axial direction (axial direction of the rotor, the inner ring 17 and the outer ring 18), and the first taper ring 19a and the second taper ring 19b. Is fitted. 2 and 3, each bolt 16 is a hexagon bolt.

  A plurality of first taper rings 19a are provided, and each outer peripheral surface is a tapered surface slidable with respect to the inner ring 17 and the outer ring 18, and each inner peripheral surface is fitted to each bolt 16. doing.

  A plurality of the second taper rings 19b are arranged, and face the first taper ring 19a in the axial direction (axial direction of the rotor, the inner ring 17 and the outer ring 18). The tapered surface is slidable with respect to the ring 17 and the outer ring 18, and each inner peripheral surface is fitted to each bolt 16.

  The above is the description of the configuration of the rotor 10 having the split rotor core. Hereinafter, the operation of the rotor 10 having the split rotor core will be described.

  First, in the friction fastener 14, when each bolt 16 is tightened, the first taper ring 19a slides in the insertion direction of the bolt 16 (right direction in FIG. 3), and the second taper ring 19b Slide in the direction opposite to the insertion direction (left direction in FIG. 3).

  Then, as shown by the thick arrows in FIG. 3, a radially inward pressure is applied to the inner ring 17 and a radially outward pressure is applied to the outer ring 18. The split-type rotor core 11 is pressed against the ring member 15 by the radially outward pressure applied to the outer ring 18.

  The outer diameter of the split-type rotor core 11 is determined by the inner diameter of the ring member 15, and the split-type rotor core 11 is fixed by a frictional force.

  The above is the description of the operation of the rotor 10 having the split rotor core. The rotor 10 having a split-type rotor core can be adjusted with high accuracy and simplicity by simply tightening the position of the split-type rotor core 11 that can suppress magnetic flux leakage by the above-described configuration and operation. 10 anti-centrifugal strength is improved.

  Hereinafter, a procedure for assembling the rotor 10 having the split rotor core will be described.

  First, the split-type rotor core 11 is equally arranged near the inner peripheral surface of the ring member 15, and the shaft 12 is provided inside the split-type rotor core 11. At that time, a space for receiving the frictional fastener 14 is provided between the inner peripheral surface of the split-type rotor core 11 and the outer peripheral surface of the shaft 12.

  Next, the frictional fastener 14 is inserted between the inner peripheral surface of the split-type rotor core 11 and the outer peripheral surface of the shaft 12, and each bolt 16 of the frictional fastener 14 is tightened so that the frictional fastener 14 is in the radial direction. By enlarging outward, the space between the shaft 12 and the split-type rotor core 11 is fixed by a frictional force.

  The rotor 10 having the split-type rotor core has been described above. In other words, the rotor 10 having the split-type rotor core is disposed on the outer peripheral surface of the split-type rotor core 11 and is an annular ring made of a nonmagnetic material. The member 15 is disposed between the inner peripheral surface of the split rotor core 11 and the outer peripheral surface of the shaft 12 disposed inside the split rotor core 11, and presses the split rotor core 11 against the ring member 15. And a friction type fastener 14 made of a non-magnetic material.

  The friction fastener 14 is disposed on the outer peripheral surface of the shaft 12, and has an annular inner ring 17 having a tapered surface from the center to both ends in the axial direction, and an inner peripheral surface of the split rotor core 11. A plurality of annular outer rings 18 having a tapered surface from the center to both ends in the axial direction, and an inner ring 17 and an outer ring 18 are arranged symmetrically with respect to the axial direction. A plurality of first tapered rings 19a, each of which has a bolt 16 facing each other, and each outer peripheral surface is a tapered surface slidable with respect to the inner ring 17 and the outer ring 18, and each inner peripheral surface is fitted to each bolt 16. And the first taper ring 19a is opposed in the axial direction, and each outer peripheral surface is a taper surface slidable with respect to the inner ring 17 and the outer ring 18, The inner peripheral surface of respectively are fitted with each bolt 16 may be provided with a plurality of second tapering 19b, further, the ring member 16 may be made of CFRP.

  As described above, in the rotor having the split rotor core according to the first embodiment of the present invention, the arrangement position of the split rotor core capable of suppressing magnetic flux leakage can be adjusted with high accuracy and simply. In addition, since the centrifugal strength of the rotor is improved, it can be applied to applications where high-speed rotation or acceleration change is large.

  The present invention is suitable as a rotor having a split rotor core.

DESCRIPTION OF SYMBOLS 10 Rotor which has split type rotor core 11 Split type rotor core 12 Shaft 13 Magnet 14 Friction type fastener 15 Ring member 16 Bolt 17 Inner ring 18 Outer ring 19a 1st taper ring 19b 2nd taper ring 20 Rotor which has an integral rotor core 21 Integrated rotor core

Claims (3)

An annular ring member disposed on the outer peripheral surface of the split-type rotor core and made of a non-magnetic material;
Disposed between an inner peripheral surface of the split-type rotor core and an outer peripheral surface of a shaft disposed inside the split-type rotor core, and enables the split-type rotor core to be pressed against the ring member; And a friction type fastener made of a non-magnetic material. A rotor having a split-type rotor core. The friction fastener is
An annular inner ring disposed on the outer peripheral surface of the shaft and having a tapered surface from the center to both ends in the axial direction;
An annular outer ring disposed on the inner peripheral surface of the split rotor core and having a tapered surface from the center to both ends in the axial direction;
Between the inner ring and the outer ring, a plurality of axisymmetrically arranged bolts each facing the axial direction,
Each outer peripheral surface is a tapered surface slidable with respect to the inner ring and the outer ring, and each inner peripheral surface is fitted with each of the bolts, a plurality of first tapered rings,
The first taper ring is opposed to the first taper in the axial direction, each outer peripheral surface is a slidable taper surface with respect to the inner ring and the outer ring, and each inner peripheral surface is fitted to each bolt. A rotor having a split-type rotor core according to claim 1, further comprising: a plurality of second taper rings. The rotor having a split-type rotor core according to claim 1 or 2, wherein the ring member is made of carbon fiber reinforced plastic.

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