Auxiliary device of steam turbine and steam turbine

Abstract

The invention relates an auxiliary device of a steam turbine and a steam turbine, the auxiliary device of the steam turbine can be used for restraining the self-excited vibration of a steam turbine bearing bush, and comprises a lubricating oil pipe, a controlled oil valve arranged on the lubricating oil pipe and a monitoring device electrically connected with the controlled oil valve; the lubricating oil pipe is provided with an oil introducing port and a first oil outlet and a second oil outlet; the oil introducing port is used for introducing the lubricating oil from the lubricating oil mother pipe of the steam turbine; the first oil outlet and the second oil outlet symmetrically extend to two sides of the upper part of the steam turbine bearing bush, and are used for exporting the lubricating oil introduced by the oil introducing port to the bearing bush; when the monitoring device detects the self-excited vibration of the bearing bush, the controlled oil valve is opened so that thefirst oil outlet and the second oil outlet export the lubricating oil to the steam turbine bearing bush, and the oil film between the bearing bush and the journal is thickened, by thickening the oilfilm, the anti-vortex force for breaking the instable vortex motion of the rotor is generated, so that the instability of the oil film is restrained, and the self-excited vibration of the steam turbine bearing bush is restrained.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a steam turbine auxiliary equipment and a steam turbine. Background technique [0002] In the field of steam turbine technology, during the start-up process of the steam turbine unit, especially when the speed is over, when the speed of the rotor rises to a certain value, the rotor is prone to vortex, which increases the vibration and quickly spreads to each bearing bush of the shaft system. The self-excited vibration of the bearing pad will further deteriorate from half-speed eddy to oil film oscillation in severe cases, resulting in the instability of the bearing pad, and even accidents such as tile rolling, which will affect the safe operation of the steam turbine unit. [0003] Traditional methods to eliminate and reduce the self-excited vibration of steam turbine bearing bushes generally include methods such as increasing lubricating oil temperature, increasing specif...

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Problems solved by technology

[0004] Based on this, it is necessary to provide a steam turbine auxiliary equipment and a steam turbine

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