JPS6022781Y2 - Thrust bearing device for submersible electric motor - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a thrust bearing device for a submersible electric motor, and in particular to the configuration of a thrust lining attached to a thrust disk that rotates with the shaft.

Fig. 1 shows a conventional thrust bearing device for a submersible electric motor, where 1 is a rotating shaft, 2 is a thrust disk supported at the lower end of the rotating shaft 1, and 3 is attached to the lower surface of the thrust disk by adhesive or the like. A thrust liner 4 formed in a ring shape is arranged opposite to the thrust liner 3, and a thrust receiver 5 consisting of a plurality of fan-shaped plates is supported by a stationary part (not shown) and receives thrust through an equalizer 6. A thrust bearing support 7 supports the bearing 4, and 7 is a pin that limits the inclination of the thrust bearing 4.

With the structure described above, the conventional thrust lining 3 has been widely made of synthetic resin mixed with carbon powder to improve lubrication performance, but as the thrust load increases with the increase in the capacity of the electric motor, Due to the harsh conditions of water lubrication, there is a risk of seizure and abnormal wear.
However, in order to prevent this, the thrust bearing has to be larger in size, resulting in higher costs.

This invention aims to improve the above-mentioned drawbacks.

An embodiment of this invention will be described below with reference to FIGS. 2 to 4.

In the figure, the same reference numerals as in Figure 1 indicate the same or equivalent parts, and 8 is a ring-shaped thrust lining made by laminating woven fabric made of asbestos fibers impregnated with synthetic resin and molded by heating and compression. It is attached to the lower surface of the thrust disk 2 by, for example, the lower surface of the thrust disk 2.

The other parts are completely the same as the conventional one.

As described above, by constructing the thrust lining with a synthetic leather resin molded product based on a woven fabric made of asbestos fibers, the load capacity of the thrust bearing can be more than doubled, and the wear resistance can also be greatly improved. Confirmed by experiment.

As described above, with this invention, the load capacity and wear resistance per unit area of the thrust lining are increased, so it can sufficiently withstand increased thrust loads, and the cost is reduced by downsizing the thrust bearing. can be reduced.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a conventional example, Figs. 2 to 4 show an embodiment of this invention, Fig. 2 is a longitudinal sectional view, Fig. 3 is a bottom view of the rotating part, and Fig. 4 is a vertical sectional view of the rotating part. 3 is a sectional view taken along the line ■-■ in FIG. 3. In the figures, the same reference numerals indicate the same or corresponding parts, 1
2 is a rotating shaft, 2 is a thrust disk, 4 is a thrust receiver, and 8 is a thrust lining.

Claims (1)

[Scope of utility model registration request] A thrust disk that is attached to the shaft of a rotating machine and rotates together with the shaft; a thrust lining that is attached to the thrust disk and is made of a laminated woven fabric made of asbestos fibers and then impregnated with synthetic resin; A thrust bearing device for a submersible electric motor, comprising a thrust bearing supported by a stationary part and receiving a thrust load transmitted through the thrust lining.