JPH05219682A - Vibration isolator of rotating electric machine - Google Patents

Abstract

PURPOSE:To isolate vibration separately, corresponding to the vibration mode (torque ripple and circular vibration) occurring in the operation of a rotating electric machine, and facilitate the design of vibrationproofing. CONSTITUTION:One end of a plate spring 11, which extends in the contact direction of the circumference of the circle around the center of a stator, is fixed to the stator 1, and a frame 13, which is possible of displacement in the longitudinal direction of the plate spring 11 through the roller 12 being guided by the rails 16 fixed to the base, is fixed to the other end of this plate spring 11, and vibration-proof rubber 14 is provided between both side faces of this frame 13 and the base 6 and the side plate 19 fixed to the base 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator for a rotary electric machine.

[0002]

2. Description of the Related Art As is well known, a rotary electric machine is provided with a vibration isolator to reduce the transmission of vibration generated during operation to the outside. FIG. 3 shows a configuration example of a conventional vibration isolator for a rotary electric machine, in which a vibration isolation rubber 4 is inserted between a leg plate 2 and an installation surface 3 provided on both lower sides of a stator frame 1 which constitutes a stator. The leg plate 2 and the installation surface 3 are fastened via bolts (or foundation bolts) not shown. Reference numeral 5 indicates the center of the stator.

[0003]

By the way, such a rotary electric machine has been aimed at reducing vibration in the circumferential direction, that is, due to torque fluctuation. However, in a rotating electric machine, it is known that annular vibration as shown in FIG. 4 is generated, and the vibration displacement caused by the annular vibration displaces the stator frame 1 in the radial direction.

Therefore, the vibration-proof rubber 4 as shown in FIG.
In the above arrangement, the spring constant in the circumferential direction, that is, the spring constant in the vertical direction and the spring constant in the shearing direction need to be set to appropriate values at the same time, which makes it difficult to design the vibration-proof rubber.

Therefore, it is an object of the present invention to separately perform vibration isolation corresponding to the vibration mode (circumferential vibration, that is, torque fluctuation and annular vibration) that occurs during the operation of the rotating electric machine. An object of the present invention is to provide an anti-vibration device for a rotating electric machine that facilitates design and reduces vibration.

[0006]

According to the present invention, there is provided a first elastic body which extends in a tangential direction of a circumference around a center of a stator and permits displacement in a direction orthogonal to the tangential direction, and the first elastic body. A second elastic body, which is arranged along the longitudinal direction of the elastic body and allows the displacement in the longitudinal direction, is provided between the stator frame and the base.

[0007]

According to the above construction, the first elastic body absorbs the radial vibration generated in the rotary electric machine and the second elastic body absorbs the circumferential vibration generated in the rotary electric machine. The spring constant of the body can be set independently, vibration damping design can be facilitated, and the rotating electric machine can be made to have low vibration.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention partially cut away, and FIG. 2 is a sectional view taken along line AA of FIG. In FIGS. 1 and 2, 1 is a stator frame that constitutes a stator, 6 is a base that supports a rotating electric machine including the stator frame 1, and 10 is both sides of the base 6 and the lower portion of the stator frame 1. The anti-vibration device provided in each of the above. Base 6
Is provided with a notch for mounting the anti-vibration device 10.

The vibration isolator 10 extends in the tangential direction of the circumference around the stator center 5 and has one end fixed to the lower portion of the stator frame 1 and the other end of the leaf spring 11. The frame body 13 that allows the leaf spring 11 to be displaced in the longitudinal direction via the roller 12, and the frame body 13 along the displacement direction of the frame body 13.
It is constituted by a vibration-proof rubber 14 provided between the base 6 and the base 6.

In this structure, the leaf spring 11 is fixed at one end to the lower portion of the stator frame 1 through the bracket 15, and the roller 12 sandwiches the rail 16 provided so as to be parallel to the leaf spring 11. A plurality of them are arranged on both the upper and lower sides, the frame 13 rotatably supports the roller 12 on the inside through a shaft 17, and one of the anti-vibration rubbers 14 is inserted into the recess 6a provided in the base 6. The frame body 13 is in contact with one side surface of the frame body 13, and the other is in contact with the other side surface of the frame body 13 by being inserted into a recessed portion 19 a provided in a side plate 19 fixed to the base 6 via a bolt 18. . The rail 16 is mounted on the base 6 via the support plate 20.
It is fixed to.

Next, the operation of the embodiment configured as described above will be described. The anti-vibration rubber 14 is provided between the stator frame 1 and the base 6 via a leaf spring 11 extending in a tangential direction of a circumference around the stator center 5 and a frame body 13 fixed to the leaf spring 11. Therefore, the stator frame 1 has a soft arrangement with respect to the displacement in the circumferential direction and effectively absorbs the torque fluctuation. Further, since the leaf spring 11 is fixed at one point on the base 6 and one point in the tangential direction of the circumference around the stator center 5 of the stator frame 1, the leaf spring 11 has a soft arrangement in the radial direction. Radial vibration of the stator frame 1 due to ring vibration can be effectively absorbed.

[0012]

As described above, according to the present invention, circumferential vibration, that is, torque fluctuation is absorbed between the stator frame that constitutes the stator of the rotating electric machine and the base that supports the rotating electric machine. Since the elastic body and the elastic body that absorbs the radial vibration due to the circular ring vibration are separately mounted, it is possible to provide a vibration damping device for a rotary electric machine which has a simple vibration damping design and a low vibration.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention partially cut away.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is a side view showing a conventional vibration isolator for a rotary electric machine.

FIG. 4 is an explanatory diagram of an annular vibration mode of a general rotating electric machine.

[Explanation of symbols]

1 ... Stator frame, 5 ... Stator center, 6 ... Base, 10
... Anti-vibration device, 11 ... Leaf spring, 12 ... Roller, 13 ... Frame body, 14 ...
Anti-vibration rubber, 15 ... Bracket, 16 ... Rail, 17 ... Shaft, 19 ...
Side plate.

Claims (1)

[Claims] 1. A first elastic body extending in a tangential direction of a circumference around a center of a stator and allowing a displacement in a direction orthogonal to the tangential direction, and along a longitudinal direction of the first elastic body. An anti-vibration device for a rotary electric machine, comprising: a second elastic body that is disposed and that allows the displacement in the longitudinal direction between the stator and the base.