Steam turbine unit oil circulation flushing bearing-bush-turnover-free construction method

Abstract

The invention discloses a steam turbine unit oil circulation flushing bearing-bush-turnover-free construction method, and relates to the field of power plant steam turbine unit oil circulation flushing methods. After internal circulation flushing operation of a steam turbine unit lubricating oil system is accomplished at present, bearing bush turnover, cleaning, instrument installation, resettingand other work need to be conducted on bearing bushes of a unit, the workload is high, the operation time is long, the technical requirement is high, and changes of part of original data of steam turbines can be caused. The steam turbine unit oil circulation flushing bearing-bush-turnover-free construction method is characterized in that after a lower bearing bush and a rotor are installed, a piece of gauze is closely embedded into a gap between the lower bearing bush and the rotor, an oil guide device which is used for increasing the cleaning oil pressure is installed in an oil outlet of thelower bearing bush, the oil outlet direction of the oil guide device keeps away from the gauze, and after a bearing pedestal cover is installed, oil circulation flushing operation is conducted throughan oil inlet channel. By the adoption of the steam turbine unit oil circulation flushing bearing-bush-turnover-free construction method, the bearing bush turnover work is avoided, the labor workloadis reduced, the flushing oil pressure can be effectively increased by the oil guide device, the flushing effect can be better, the situation that original data of steam turbine installation are not changed is ensured, the flushing cost is reduced, and the construction period is shortened.

Description

technical field [0001] The invention relates to the field of oil circulation flushing methods for steam turbine units in power plants, in particular to a construction method for oil circulation flushing of steam turbine units without overturning tiles. Background technique [0002] At present, the steam turbine unit is the key equipment of the power plant, and its safe operation is directly related to the normal operation of the power plant. In the safe operation of the steam turbine unit, the lubricating oil system of the unit is an important part. It mainly provides sufficient and clean lubricating oil for the bearings of the unit, so that it forms an oil film between the rotor journal and the bearing bush, which plays a role in lubrication and Reduce the wear of the bearing bush, and at the same time take away the heat generated by the bearing through the lubricating oil. The safe operation and life of the steam turbine have a great relationship with the cleanliness of t...

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Problems solved by technology

[0006] The requirements for tile turning work are very high, and high-level technicians are required to repeatedly disassemble and inspect the bearing bush, instrument line, instrument probe, jacking oil pipe, etc. During the construction process, the rotor is slightly lifted and When putting down, turning over and placing the bearing bush, it is very easy to cause damage to the bearing bush, instrument probe and instrument line due to factors such as narrow construction location, spreader and environment, and damage to the inside of the bearing box, bearing body, oil inlet passage, etc. It will cause more secondary pollution. At the same time, after the bearing pad is reset, the position, contact surface, bearing clearance, and tightening force of the bearing pad may also change slightly, resulting in some original data of the steam turbine. caused many uncertainties

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