JPH04334950A - Stator frame of rotating electric machine and assembling structure thereof - Google Patents

Abstract

PURPOSE:To obtain a stator frame structure to be so assembled even without curing a stator winding as not to cause a welding distortion to a mechanically processed surface. CONSTITUTION:Seat plates 7A, 7B for previously mounting an outer peripheral plate are welded to press rings 1A, 1B for clamping a stator core S, and the peripheral plate 3 is mounted onto the plates 7A, 7B in a final step.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a stator frame for a rotating electrical machine and its assembly structure.

0002

2. Description of the Related Art FIG. 2 is a plan view of a stator frame, and FIG. 3 is a sectional view taken along the line P--P in FIG. This stator frame includes two annular plate-shaped press rings 1A and 1B, a plurality of reinforcing columns 2,
It is composed of one curved outer peripheral plate 3. To explain the assembly order of the stator frame, first, sandwich and tighten both end faces of the stator core S between two press rings 1A and 1B, and in this state insert the reinforcing column 2 through the square hole 4 of the upper press ring 1A. Then, attach the lower part of this reinforcing column 2 to the lower press ring 1B.
The sides are welded to the outer periphery of the stator core S, and the upper part is welded to the square hole 4 of the upper press ring 1A for fixation. Next, after the stator winding C was coiled into the stator core S, the outer circumferential plate 3 was fitted between the upper press ring 1A and the lower press ring 1B and fixed by direct welding. The stator frame in such a state is machined in order to be attached to upper and lower brackets (not shown) of the rotating electric machine. This machining is the part indicated by the dashed dot line in order to finish the outer distance L of both press rings 1A and 1B to a predetermined dimension and correct the surface runout on both outer surfaces when attaching the press rings 1A and 1B to a bracket (not shown). These are the work of cutting 5 and the work of drilling the mounting hole 6.

0003

[Problems to be Solved by the Invention] In the stator frame assembly process, when the outer peripheral plate 3 is welded to the press rings 1A, 1B, the press rings 1A, 1B are distorted due to the high heat generated. The machining of 1B was performed after the welding work was completed. Therefore, it is necessary to cure (protect) the stator winding C so that it is not damaged by cutting chips generated during machining. In addition, when welding the outer peripheral plate 3 to the press rings 1A and 1B, the outer peripheral part of the stator core S should be covered or otherwise protected so that the welding splash flow does not enter the inner peripheral part of the stator core S through the gap. There was a problem that I had to do it.

[0004] In view of the above-mentioned problems, the object of the present invention is to
To provide a stator frame structure in which assembly work can be performed without curing stator windings or stator cores during the stator frame assembly process.

[0005]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes two annular plate-shaped press rings for tightening the stator frame of a rotating electric machine on both end surfaces of the outer peripheral part of the stator core.
A plurality of reinforcing columns are attached to the two press rings and the outer periphery of the stator core, seat plates each are provided near the outer periphery of the two press rings, and straddle the seat plates. It consists of an attached outer peripheral plate. The assembly structure of the stator frame is constructed such that the seat plate is welded to the press ring in advance before assembling the stator frame, and the outer peripheral plate is welded in the final process of assembling the stator frame.

[0006]

[Operation] In the stator frame of a rotating electrical machine with such a configuration and its assembly structure, the reinforcing column is welded to the stator core and press ring while the stator core is sandwiched between two press rings at both end faces and pressurized. After machining the press ring in this state, the stator winding is wound around the stator core, and then the outer peripheral plate is attached and welded to the seat plate of the press ring. Therefore, there is no need to protect the stator winding when winding the stator winding, and when the outer circumferential plate is attached to the seat plate of the press ring and welded, the welding spatter flow is blocked by the seat plate and the internal There is no need for curing the outer periphery of the stator core.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of a stator frame of a rotating electric machine according to an embodiment of the present invention, and the same parts are denoted by the same reference numerals as those of the conventional stator frame shown in FIG. The difference between this embodiment and the conventional example is that the press ring 1 is not machined.
By providing seat plates 7A and 7B on A and 1B, the assembly order of the stator frame can also be changed. In other words, both end faces of the stator core S are covered with two press rings 1A and 1B.
In this state, insert the reinforcing column 2 through the square hole 4 of the upper press ring 1A, weld the lower part of this reinforcing column 2 to the lower press ring 1B, and then tighten the side edges of the reinforcing column 2. It is welded to the outer periphery of the stator core S, and the upper part of the reinforcing column 2 is further welded and fixed to the square hole 4 of the upper press ring 1A. Next, in order to finish the press rings 1A, 1B in such a state to a predetermined size necessary for mounting to a bracket (not shown) and to correct surface runout, the dashed-dotted line portion 5 is cut and a mounting hole 6 is drilled. Subsequently, the stator winding C is wound around the stator core S, and then the outer peripheral plate 3 is wrapped around the seat plates 7A and 7B and fixed by welding.

[0008]

According to the present invention, the order of assembling the stator frame can be changed by providing the press ring with a seat plate for attaching the outer peripheral plate. In other words, in the final assembly process, the outer circumferential plate is welded to the seat plate that has been previously welded to the press ring, so the heat generated by welding is not transferred directly to the press ring.
Therefore, the welding distortion of the press ring can be made extremely small, so that the outer peripheral plate can be welded to the seat plate after machining the press ring, and curing of the stator winding is not necessary. In addition, since the outer peripheral plate has a lap allowance on the seat plate, the welding scattering flow generated during welding can be completely prevented from entering the outer periphery of the stator core, eliminating the need for curing the outer periphery of the stator core. Become.

[Brief explanation of drawings]

[Fig. 1] A cross-sectional view of a stator frame of a rotating electrical machine that is an embodiment of the present invention.

[Figure 2] Plan view of the stator frame of a rotating electrical machine with a conventional structure

[Figure 3
】A cross-sectional view of the stator frame taken along the line P-P in FIG. 2.

[Explanation of symbols]

1A Upper press ring 1B Lower press ring 2 Reinforcement pillar 3. Outer peripheral plate 7A Upper seat plate 7B Lower seat plate S　Stator core

Claims (2)

[Claims] 1. Two annular plate-shaped press rings that tighten both end surfaces of the outer circumference of the stator core, and a plurality of reinforcing columns that are attached to the two press rings and the outer circumference of the stator core. A stator frame for a rotating electrical machine, comprising: a seat plate provided near the outer periphery of each of the two press rings; and an outer peripheral plate attached across the seat plates. Claim 2: The seat plate for attaching the outer peripheral plate is welded to the press ring in advance before assembling the stator frame, and the outer peripheral plate is welded in the final process of assembling the stator frame. The assembly structure of a stator frame of a rotating electric machine according to claim 1.