Anti-siphon device for generator stator cooling water system

Abstract

The invention discloses an anti-siphon device for a generator stator cooling water system, and belongs to the technical field of generator cooling equipment. The device comprises a water tank, a waterpump, a water incoming pipe connected to an inlet of a generator stator coil, and a water outgoing pipe connected to an outlet of the generator stator coil. The device is characterized in that the device also comprises a flash tank and a water returning pipe; the water incoming end of the water pump is communicated with the water tank, and the water outgoing end of the water pump is connected with the generator stator coil through the water incoming pope; one end of the water returning pipe is connected with one end of the flash tank, and the other end of the water returning pipe is connectedwith the water tank; the water outgoing pipe is connected with the other end of the flash tank; the water tank is provided with a breather pipe, wherein one end of the breather pipe is connected withthe water tank and the other end of the breather pipe is connected with the flash tank. The device can effectively avoid the risks of wire rod electric flashover and insulating loss caused by the pumping of water in the generator stator coil because of the siphonic effect, and improves the operation stability of a generator set.

Description

technical field [0001] The invention relates to the technical field of generator cooling equipment, in particular to an anti-siphon device for a generator stator cooling water system. Background technique [0002] The stator coil of a large-capacity water-cooled hidden pole generator usually uses water medium to cool the stator coil. The generator enters the stator coil through the inlet of the generator stator coil. After cooling the water medium of the generator stator coil, it flows back from the outlet of the generator stator coil to the lower water tank, and repeats itself to form a closed circulating water system. [0003] When all the water pumps fail, the negative pressure of the water medium in the return pipe of the stator coil due to gravity will draw out the water medium in the stator coil, resulting in an anhydrous or mixed state of water and air in the stator bar of the generator, and there may be water in the coil Risk of electrical flashover, insulation dama...

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Problems solved by technology

[0005] The stator cooling water system of the thermal power plant generator disclosed in this patent document can automatically start the stator cooling water system when the stator cooling water system is completely stopped; when the stator cooling water system is running, it can realize the stator cooling water system. However, when the water pump of the stator cooling water system suddenly fails and the cooling water system stops running, it cannot effectively avoid the electrical flashover of the wire rod and the damage of the insulation due to the siphon effect of pumping out the water in the stator coil of the generator. Risks affecting the stability of generator set operation

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