JPH022053Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotating electrical machine having a bearing bush that supports the weight of the rotor of the rotating electrical machine and includes a thrust pad and an elastic body for receiving a horizontal thrust load.

This type of bearing bush usually has a four-division structure: top and bottom, left and right. This will be explained based on the drawings. Fig. 1 is a partial cross-sectional view of a bearing stand for a rotating electric machine having a conventional bearing bushing, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a detailed view of the bearing bushing in Fig. 1. The vertical cross-sectional view and FIG. 4 are detailed cross-sectional views of the same as above. A rotating shaft 2 having a thrust bearing flange 2a passes through the bearing stand 1, and a bearing that surrounds this rotating shaft 2 is divided into four parts (divided into upper and lower parts in the axial direction, and further divided into left and right parts at the center in the axial direction). The bushes 3, 3' are housed and covered with a stand cover 4 and a bearing cap 10. The bearing bush 3 on the left in the figure is provided with an elastic body and a thrust pad (in this figure, the structure receives only the thrust load from the right side of the rotating shaft 2). An annular elastic body 5 was placed, and then a plurality of fan-shaped thrust pads 6 were arranged in the circumferential direction of the semicircular elastic body 5 and positioned using pins 7. The fan-shaped thrust pads 6 were each fixed to the bearing bush 3 with pin bolts 8. The reason why the bearing bush has a four-part structure is as follows. That is, (1) the elastic body 5 for giving elasticity to the fan-shaped thrust pad 6 in the axial direction and supporting it is attached to the bearing bush 3 in order to maintain its position with the thrust pad 6;
A pin hole is provided in the side surface of the groove, and the position is determined by the pin 7, so it is necessary to separate the left and right parts in order to process this pin hole.

(2) During machining, the groove of the bearing bush 3 in which the thrust pad 6 is provided has only enough space for the thickness of the thrust receiving flange 2a of the rotating shaft 2, so the machining stroke by the cutting tool is insufficient and machining is not possible. For this reason, the bearing bush was divided into left and right parts, and machining was performed from the divided surfaces with a cutting tool.

(3) Generally, the disassembly and assembly of the bearing bushing is carried out by leaving the lower part of the bearing stand 1 in the same position and removing the upper bearing cap 10. It is necessary to divide the bearing bush into upper and lower parts.

However, when the bearing bush was constructed in four parts, it required too many man-hours for machining, assembly, and disassembly, and there were drawbacks such as quality problems depending on the accuracy of machining and assembly.

The purpose of this invention is to eliminate the four-part structure, simplify the structure, and provide a rotating electrical machine with a bearing bushing that is easy to process, assemble, and disassemble.
The structure was as follows. That is, a rotating shaft 2 having a thrust receiving flange 2a, a bearing bush 13, an elastic body 15, a thrust pad 16,
The first support pin 17, the presser ring 19, and the second
The rotating electrical machine has a support pin 18, in which the bearing bush 13 is divided into upper and lower halves, and a recess 21 is formed on the inner diameter side, and the rotating shaft 2 is supported by the bearing bush 13, and The thrust bearing flange 2a is connected to the recess 21 of the bearing bush 13.
The thrust pad 16 is inserted into the
It is inserted into the recess 21 of the bearing bush 13, the outer side thereof is fixed to the bearing bush 13 by the first support pin 17, and comes into contact with the thrust bearing flange 2a, and the elastic body 15
is inserted between the thrust pad 16 and the bearing bush 13, and is connected to the second support pin 18.
The circumferential hole 22 of the thrust pad 16 is
The presser ring 19 is achieved by a rotating electric machine having a bearing bush that supports the thrust pad 16 and is fixed on the inner circumference of the bearing bush 13 by a screw 20.

Examples of this invention will be described below based on the drawings. Fig. 5 is a partial sectional view of a bearing stand for a rotating electric machine having a bearing bush which is an embodiment of this invention, Fig. 6 is a sectional view taken along the line B-B in Fig. Detailed longitudinal cross-sectional view of the bearing bushing in
FIG. 8 is a detailed cross-sectional view of the same as the above, and parts and locations common to those in FIGS. 1 to 4 are designated by the same reference numerals and their explanations will be omitted. A rotating electrical machine having a bearing bushing according to this invention includes a rotating shaft 2 having a thrust bearing flange 2a, a bearing bushing 13, and an elastic body 15.
, thrust pad 16 , and first support pin 17
, a presser ring 19 , and a second support pin 18 . The bearing bush 13 has an upper and lower halves, and a recess 21 is formed on the inner diameter side. The rotating shaft 2 is supported by a bearing bush 13, and the thrust bearing flange 2a is inserted into a recess 21 of the bearing bush 13. Multiple fan-shaped thrust pads 16
is fixed to the bearing bush 13 and comes into contact with the thrust bearing flange 2a. A semi-circular elastic body 15 is inserted between the thrust pad 16 and the bearing bush 13, and is fixed in a circumferential hole 22 of the thrust pad 16 by a second support pin 18. The presser ring 19 is the thrust pad 1
6 and is fixed on the inner diameter side circumference of the bearing bush 13 with a screw 20. The bearing bush 13 equipped with the elastic body and thrust pad in this way
Assemble.

As mentioned above, in this invention, as a measure to eliminate the left and right division of the bearing bush, (1) the spigot on the inner diameter side of the groove of the bearing bush where the thrust pad 16 is installed is eliminated, and the thrust pad 16 is fixed with the retaining ring 19; This retaining ring 19 has a structure in which screw holes are drilled at arbitrary locations on the circumference on the inner diameter side of the bearing bushing 13 and fixed with bolts 20, so that there is no need to divide the bearing bushing 13 into left and right parts. Turning became possible.

(2) The second support pin 18 for maintaining the position of the elastic body 15 and the thrust pad 16 is inserted into the hole 22 in the circumferential direction of the thrust pad 16, so that the second support pin 18 is inserted into the hole 22 in the circumferential direction. There is no need to drill holes and there is no need to divide the bearing bush into left and right parts.

As a result of the above measures, the bearing bush can be divided into upper and lower halves instead of four, which simplifies the structure, improves machining accuracy, and improves quality.
In addition, by reducing the number of man-hours, we were able to provide an inexpensive bearing bushing.

[Brief explanation of the drawing]

Figure 1 is a partial cross-sectional view of a bearing stand for a rotating electric machine having a conventional bearing bush, and Figure 2 is a
3 is a detailed vertical sectional view of the bearing bushing in FIG. 1, FIG. 4 is a detailed cross-sectional view of the same as above, and FIG. 6 is a sectional view taken along the line B-B in FIG. 5,
FIG. 7 is a detailed longitudinal cross-sectional view of the bearing bush in FIG. 5, and FIG. 8 is a detailed cross-sectional view of the same. 13...Bearing bush, 15...Elastic body, 16
...Thrust pad, 17...First support pin,
18... Second support pin, 19... Holder ring, 21... Recess, 22... Hole.

Claims (1)

[Claims for Utility Model Registration] A rotating shaft 2 having a thrust receiving flange 2a,
The rotating electric machine includes a bearing bush 13, an elastic body 15, a thrust pad 16, a first support pin 17, a presser ring 19, and a second support pin 18. The rotating shaft 2 is supported by the bearing bush 13, the thrust receiving flange 2a is inserted into the recess 21 of the bearing bush 13, and the thrust pad 16 has a split structure with a recess 21 formed on the inner diameter side. is inserted into the recess 21 of the bearing bush 13, and its outer side is aligned with the first
The elastic body 15 is inserted between the thrust pad 16 and the bearing bush 13, and is fixed to the bearing bush 13 by a support pin 17, and comes into contact with the thrust bearing flange 2a. The thrust pad 16 is supported by the support pin 18.
The presser ring 19 is fixed in a circumferential hole 22 of the thrust pad 1.
6. A rotating electrical machine having a bearing bushing, characterized in that the bearing bushing 6 is fixed on the inner circumference of the bearing bushing 13 with a screw 20.