JP7410769B2 - Rotor and rotor balance adjustment method - Google Patents

Description

The present embodiment relates to a rotor and a rotor balance adjustment method.

The rotational balance of rotors used in motors and generators is adjusted in order to obtain stable rotation and torque characteristics. Conventionally, rotational balance has been adjusted by cutting an end plate member provided at an axial end of a rotor body (see Patent Document 1). That is, to adjust the rotational balance, the rotational balance is measured by rotating the assembled rotor, and the end plate member is cut using a dedicated processing machine based on the measured value. In this way, the rotational balance of the rotor is adjusted by repeating the measurement of the rotational balance and the cutting of the end plate member.

However, when adjusting the rotational balance, the measurement of the rotational balance and the cutting of the end plate member are repeated multiple times. Therefore, when adjusting the rotational balance of the rotor, it is necessary to move the rotor back and forth between a measuring device that measures the rotational balance and a processing machine that cuts the end plate member, and to process the rotor using the processing machine. As a result, there are problems in that on-site work becomes difficult and the number of man-hours required increases. In addition, when adjusting the rotational balance by reducing weight by cutting, if excessive cutting occurs, a new adjustment is required, and there is a problem in that the number of man-hours increases depending on the skill level of the operator.

Japanese Patent Application Publication No. 2005-218293

Therefore, it is an object of the present invention to provide a rotor whose rotational balance can be easily adjusted without complicating work or increasing the number of man-hours.
Another object of the present invention is to provide a method for adjusting the rotational balance of a rotor, which improves the accuracy of adjusting the rotational balance regardless of the level of skill.

In order to solve the above problems, the rotor of this embodiment includes a rotor main body, an end plate member, a slit portion, and an adjustment member. The end plate member is provided at at least one end of the rotor main body in the axial direction. The slit portion is provided in the end plate member in the circumferential direction. The adjustment member is removably attached to the slit portion, and adjusts the balance of the rotor body.

A schematic diagram of an end plate member of a rotor according to one embodiment, viewed from the direction of arrow I in FIG. Schematic diagram of a rotor according to one embodiment FIG. 2 is a schematic diagram showing a main part of an end plate member of a rotor according to an embodiment, and is a sectional view taken along line III-III in FIG. 1.

Hereinafter, one embodiment of the rotor will be described based on the drawings.
As shown in FIG. 2, the rotor 10 includes a rotor main body 11, a rotating shaft member 12, an end plate member 13, and an end plate member 14. The rotor 10 is applied to a motor, a generator, or the like. The rotor main body 11 is provided on the radially outer side of the rotating shaft member 12. The rotor main body 11 includes, for example, a coil wound around the rotating shaft member 12 or a permanent magnet attached to the outside of the rotating shaft member 12 in the radial direction. The rotor main body 11 rotates around a rotating shaft member 12 as an axis. The rotating shaft member 12 extends in the axial direction of the rotor 10.

The end plate member 13 and the end plate member 14 are provided at the end of the rotor body 11 in the axial direction of the rotating shaft member 12. In the example shown in FIG. 2, the rotor 10 has an end plate member 13 and an end plate member 14 at both ends of the rotor body 11, respectively. That is, the rotor 10 includes an end plate member 13 at one end in the axial direction, and an end plate member 14 at the other end. The end plate member 13 and the end plate member 14 are both formed in a disk shape, and are provided on the radially outer side of the rotating shaft member 12 together with the rotor main body 11. The rotor 10 only needs to have an end plate member 13 at at least one end in the axial direction.

In addition to the above, the rotor 10 includes a slit portion 15 as shown in FIG. In the case of the rotor 10 including two end plate members 13 and 14 as in this embodiment, the slit portion 15 is provided in at least one of the two end plate members 13 and 14. It is being In the example shown in FIG. 2, the slit portion 15 is provided in the end plate member 13. Note that the slit portion 15 may be provided in both the end plate member 13 and the end plate member 14.

The slit portion 15 is provided on a surface 16 of the end plate member 13 opposite to the rotor main body 11. Specifically, the slit portion 15 is recessed from a surface 16 of the end plate member 13 opposite to the rotor body 11 toward the rotor body 11 side, that is, in the plate thickness direction. The slit portion 15 is formed in a groove shape halfway in the thickness direction of the end plate member 13, as shown in FIG. Note that at least a portion of the slit portion 15 may penetrate the end plate member 13 in the thickness direction to the surface on the rotor main body 11 side. As shown in FIG. 1, the slit portion 15 is provided in the circumferential direction of the end plate member 13 with the rotating shaft member 12 as the center. That is, the slit portion 15 is provided in an annular shape at the end of the end plate member 13. Note that the slit portion 15 is not limited to a continuous annular shape, but may be formed in an arc shape divided into two or more parts in the circumferential direction.

The rotor 10 includes an adjustment member 20 as shown in FIGS. 1 to 3. The adjustment member 20 is removably provided in the slit portion 15. That is, the adjustment member 20 can be attached to the slit portion 15 and can be removed from the slit portion 15. Further, after the adjustment member 20 is attached to the slit portion 15, it can be moved along the slit portion 15 in the circumferential direction of the end plate member 13. The adjustment member 20 has a fitting part 21 and a weight part 22, as shown in FIG. The fitting portion 21 is made of an elastic body such as a leaf spring or resin, for example. Thereby, the fitting part 21 is fitted into the slit part 15. Moreover, by forming the fitting part 21 from an elastic body, it can be fitted into the slit part 15 and can be removed from the slit part 15 . The weight portion 22 is connected to the fitting portion 21. The weight portion 22 is set to have a preset mass. The weight portion 22 is set to have various masses, such as 10 g, 20 g, 50 g, etc., for example. The end plate portion 13 has a flange portion 23 that projects in the radial direction from the slit portion 15 . The fitting portion 21 of the adjustment member 20 is attached to the slit portion 15 by engaging with the flange portion 23 .

Next, a method for adjusting the balance of the rotor 10 with the above configuration will be explained.
(Measurement process)
In the rotor 10, the rotor main body 11, the end plate member 13, and the end plate member 14 are attached to the rotating shaft member 12 before the balance is adjusted. The rotor main body 11 is attached to the rotating shaft member 12 by, for example, wrapping or press-fitting. The rotor main body 11 can be attached to the rotating shaft member 12 by any method other than these, such as screwing. Similarly, the end plate member 13 and the end plate member 14 are attached to the rotor main body 11 and the rotating shaft member 12 by press fitting, screwing, or the like. With these, the rotor 10 is assembled before the balance is adjusted. The rotational balance of the assembled rotor 10 is measured. The rotational balance of the rotor 10 is measured by a balance measuring device (not shown). The rotational balance of the rotor 10 is measured, for example, by rotating the rotor 10 at a preset rotation speed. In this case, in the rotor 10, for example, mass deviation, deviation of the axis of the rotating shaft member 12, etc. are measured as rotational balance.

(adjustment process)
When the rotational balance of the rotor 10 is measured in the measurement process, the adjustment member 20 is attached to the slit portion 15 of the end plate member 13. The mounting position of the adjustment member 20 and the mass of the weight portion 22 are determined based on the rotational balance measured in the measurement process. That is, in the measurement step, by measuring the rotational balance of the rotor 10, the adjustment member 20 necessary for establishing rotational balance by eliminating mass imbalance and axial center deviation is determined. Specifically, in the measurement step, the mounting position of the adjustment member 20 and the mass of the weight portion 22 necessary for establishing these rotational balances are calculated. The weight portion 22 of the adjustment member 20 is selected based on the attachment position and the mass of the weight portion 22 calculated in the measurement step, and is attached to the calculated attachment position.

(Measurement process after adjustment)
When the adjustment member 20 is attached to the slit portion 15 of the rotor 10, the rotational balance of the rotor 10 to which the adjustment member 20 is attached is measured again. By attaching the adjustment member 20 to the slit portion 15 of the rotor 10, the rotational balance is adjusted, and the deviation of the mass and the deviation of the axis are reduced. The rotational balance of the rotor 10 whose mass deviation and shaft center vibration have been reduced in this way is measured again for confirmation in the post-adjustment measurement process.

In this post-adjustment measurement process, if the rotational balance is a preset value, the adjustment of the rotor 10 is completed. On the other hand, if the rotational balance is not at the preset value in the post-adjustment measurement process, the rotor 10 is rotated again in the post-adjustment measurement process by changing the mounting position or mass of the adjustment member 20 in the adjustment process again. Balance is measured. The rotor 10 repeats the adjustment process and the post-adjustment measurement process until the rotational balance reaches the set value. In this case, the set value is set according to the performance required of the rotor 10. The set value may be a specific value or a specific range of values.

As explained above, the rotor 10 of this embodiment includes the slit portion 15 in the end plate member 13. The rotor 10 includes an adjustment member 20 that can be attached to and detached from the slit portion 15. Thereby, in the rotor 10, the adjusting member 20 is attached to the slit portion 15 of the end plate member 13 based on the measured rotational balance. Since the adjustment member 20 can be attached to and removed from the slit portion 15, the attachment position and mass thereof are selected depending on the measured rotational balance. Therefore, unlike adjustment by cutting, for example, the rotational balance of the rotor is adjusted without excessive adjustment. Therefore, it is possible to easily adjust the rotational balance without complicating the work or increasing the number of man-hours.

Moreover, in this embodiment, the slit portion 15 of the end plate member 13 is provided in the circumferential direction. Therefore, even after the adjustment member 20 is attached to the slit portion 15, the position thereof can be finely adjusted by moving along the slit portion 15 in the circumferential direction. Thereby, there is no need to attach or detach the adjusting member 20 when slightly adjusting the rotational balance. In addition, when adjusting the balance of the rotor 10, for example, the adjustment member 20 is moved along the slit portion 15 while the rotor 10 is mounted on the measuring device, without causing a large movement of the rotor 10. Easy to adjust. Particularly in the case of a large rotor 10, on-site adjustment work becomes easier. Therefore, the rotational balance can be highly and easily adjusted without increasing the number of man-hours.

In this embodiment, the adjustment member 20 has a weight portion 22 . Therefore, by preparing adjustment members 20 having weight portions 22 with different masses, an appropriate adjustment member 20 can be selected according to the measured rotational balance. Therefore, the rotational balance can be easily adjusted without excessive adjustment. Further, the adjustment member 20 has a fitting portion 21 . Therefore, the adjustment member 20 can be easily attached to and detached from the slit portion 15 of the end plate member 13. By adjusting the holding force of the fitting portion 21, removal from the end plate member 13 and movement along the slit portion 15 are ensured while reducing the possibility of the adjustment member 20 falling off from the end plate member 13. Therefore, the rotational balance can be highly and easily adjusted without increasing the number of man-hours.

In this embodiment, the rotational balance of the assembled rotor 10 is measured in the measurement process, and then the rotational balance is adjusted in the adjustment process and the post-adjustment measurement process. In this case, the mass and position of the adjustment member 20 are roughly determined in the first measurement step. Then, the rotational balance of the rotor 10 is roughly adjusted by the determined mass and position of the adjustment member 20. At this time, excessive adjustment is less likely to occur than when adjusting the rotational balance by, for example, cutting. In the case of this embodiment, even if the accuracy of the mass and position of the adjustment member 20 is low, the adjustment member 20 can be easily attached/detached, moved, and changed. Therefore, adjusting the rotational balance does not require skill. Therefore, the accuracy of rotational balance adjustment can be improved regardless of skill level.

Although multiple embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

In the drawings, 10 is a rotor, 11 is a rotor main body, 13 and 14 are end plate members, 15 is a slit portion, 20 is an adjustment member, 21 is a fitting portion, and 22 is a weight portion.

Claims (2)

rotor body,
an end plate member provided at at least one end in the axial direction of the rotor main body;
a slit provided in the end plate member in the circumferential direction;
an adjusting member that is removably attached to the slit portion and that adjusts the balance of the rotor body;
Equipped with
The adjustment member has a fitting part formed of an elastic body and fitted into the slit part, and a weight part connected to the fitting part,
By forming the fitting part with the elastic body, the adjusting member is removable from the slit part, and the adjusting member is arranged in a circumferential direction of the end plate member in a state where the fitting part is attached to the slit part. It is possible to move to
rotor. A rotor balance adjustment method comprising the adjustment member according to claim 1,
a measuring step of measuring the rotational balance of a rotor having an end plate member at at least one end in the axial direction of the rotor body;
an adjustment step of attaching an adjustment member to the end plate member for adjusting the rotational balance based on the measured rotational balance of the rotor;
a post-adjustment measurement step of measuring the rotational balance of the rotor to which the adjustment member is attached,
A rotor balance adjustment method, comprising repeating the adjustment step and the post-adjustment measurement step until the rotational balance of the rotor reaches a preset value.

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