Stall cut-off protection device for hydro-generator

Abstract

The invention relates to the technical field of generators, and discloses a stall cut-off protection device for a hydro-generator. The stall cut-off protection device comprises a shell, a water inlet pipe is fixedly connected in the shell, a direct illuminating lamp is fixedly connected in the shell, a photosensitive assembly is fixedly connected in the shell, a gear is rotatably connected in the shell, a toothed bar is slidably connected in the shell, a connecting rod is rotatably connected outside the toothed bar, and a rotating rod is rotatably connected to the end, away from the toothed bar, of the connecting rod. Through mutual cooperative use of the shell, the water inlet pipe, the direct illuminating lamp, the photosensitive assembly, the gear, the toothed bar, the connecting rod, the rotating rod, a sealing plate and a sleeve rod, after a water turbine stalls, through automatic operation of mechanisms, the effect of water turbine stalling automatic protection can be achieved, the situation of long-time overload operation of the water turbine is further avoided, internal accessories of the water turbine are protected, the service life of the water turbine is prolonged, and the manual maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of generators, in particular to a stall cut-off protection device for a hydroelectric generator. Background technique [0002] A generator is a mechanical device that converts other forms of energy into electrical energy by using power machinery such as water turbines, steam turbines, and diesel engines. For example, a water turbine is a power machine that converts the energy of water flow into electrical energy. [0003] Most modern water turbines are installed in hydropower stations to drive generators to generate electricity. In hydropower stations, the water in the upstream reservoir rushes towards the turbines under the action of gravity, pushing the turbine runners to rotate to drive the generators to generate electricity. Due to the head of the upstream reservoir Uncontrollable, the higher the water head, the greater the output power of the turbine. When the water head is too high, the output power of...

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a stall interception protection device for hydroelectric generators, which has the advantages of automatic detection of hydroturbine stall and automatic protection of hydroturbine stall, and solves the problem that the water head of the upstream reservoir cannot be controlled, and the water head is getting higher and lower. If the water head is too high, the output power of the turbine will be greater. When the water head is too high, the output power of the turbine will exceed the rated power, which will cause the turbine to perform overload operation, and the existing equipment cannot detect the stall of the turbine. , it will shorten the service life of the turbine, and the existing equipment cannot complete the adjustment and protection of the stalled turbine. If the turbine is overloaded for a long time, it may cause damage to the internal parts of the turbine, and it will take a lot of manpower and material resources to repair it. question

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