SU87592A2 - The method of emptying the water turbine impeller chamber when the hydrogenerator is switched to the synchronous compensator mode - Google Patents

Description

There is a known method of releasing the chamber of the working knee from water by squeezing out water with compressed air that is injected into its chamber. The implementation of this method requires the installation of powerful.x zozdushny.x compressors and air receivers of large volume, serving; 1. for the initial filling of the impeller chamber and continuous: :) ывннн; th replenishment of the air leakage into the atmosphere through 1 channel of the 1 nd an.iajiaT and the turbine suction pipe.

In addition, the subject of the invention is the improvement of the method of emptying the impeller chamber of a water turbine npii transferring the hydrogenerator to a synchronous compensator mode using high-speed shields in the suction pipe:; si NS 78246.

The described method is much simpler, more convenient and cheaper. It consists in the fact that the suction pipe is blocked with fast-acting shields to separate the impeller chamber i: the downstream, as well as for subsequent emptying of the chamber from water.

The drawing schematically shows a device for emptying the impeller chamber.

The lower part of the chamber / between the impeller 2 and the fast-acting shields 3 is connected with the help of a downcomer 4 with a water intake gallery 5, which is located in the sub-part of the power plant below the chamber /.

In order to free the chamber from the water / close the turbine guide, shut off the suction pipe 6 with fast-acting shields 3 and open the electric valve 7 of the discharge pipe 4 and the air valve 8 in the turbine cover to release atmospheric air into the impeller chamber. Then the water from the impeller area by gravity through the discharge pipe 4 will be discharged into the water intake gallery 5. Water is pumped from the gallery to the lower reach as required by the general station pump (not shown in the drawing). The transfer of the hydrogenerator to the synchronous compensator mode is carried out in the usual way.

Subject invention

The method of emptying the water turbine impeller calipers when the hydrogenerator is switched to the synchronous compensator mode using the high-speed shields in the suction pipe according to the author. St. jYs 78246. characterized in that the suction pipe is covered with shields, and the water from the impeller chamber is drained by gravity through the pipeline into the water intake gallery located below in the underwater part of the hydrostatic column, followed by pumping the water into the lower bay.

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