Load-reducing device for rolling bearing type thrust bearing for hydraulic turbine

Abstract

The invention discloses a thrust bearing load-reduce device of a rolling bearing type water turbine; the device comprises a supporting member, the upper face of the supporting member is provided with a fixed shaft which is equipped with a rolling bearing, the lower face of the supporting member is provided with a height adjuster which comprises an upper connecting piece connected with the supporting member, a lower connecting piece is correspondingly arranged below the upper connecting piece, the contact face of the upper connecting piece and the lower connecting piece is an inclined surface, the two ends of the lower connecting piece are provided with bolts which can cause the lower connecting piece to do left-right movement; the inner ring of the rolling bearing is fixed on a supporting shaft, the outer ring thereof can rotate freely and is in direct contact with a runner plate for bearing load; the adoption of the device can greatly reduce the pressure born by a thrust bearing pad when the water turbine is started or stopped, reduces the abrasion of the thrust bearing pad, and prevents the accidents such as pad burning, and the like, caused by the faults of a high pressure oil load-reduce device. The device has the advantages of simple structure, convenient debugging, reliable running, low cost, etc.

Description

technical field [0001] The invention relates to a mechanical load reduction device in mechanical engineering, in particular to a rolling bearing type water turbine thrust bearing load reduction device, which is used to reduce the load on the thrust pad. Background technique [0002] In large-scale hydroelectric generating units, the thrust bearing load is relatively large. During the start-up and shutdown of the unit, due to the low speed, the oil film of the thrust pad is relatively thin, and the friction coefficient is relatively large. There is a danger of semi-dry friction between the thrust pad and the mirror plate. state, which is very unfavorable to the lubrication of thrust bearings. In order to solve the problem of difficulty in establishing an oil film in a thrust bearing with a large load, the main method at present is to use a high-pressure oil jacking device to raise the mirror plate during the start-up and shutdown of the unit, so that the oil film is formed on...

AI Technical Summary

Problems solved by technology

However, the installation and debugging of this high-pressure oil jacking device is complicated, and the requirements for the cleanliness of the high-pressure oil and the sealing of the device are very high, and it is easy to fail and burn the thrust pad.

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