Structure for preventing water entrance and oil leakage in steam turbine oil

Abstract

The invention discloses a structure for preventing water entrance and oil leakage in steam turbine oil. The structure comprises a rotor shaft, a bearing, a bearing cap, an oil catch, impellers, a cylinder body, a steam seal and sealing rings II, wherein the bearing is matched with an outer circle of the rotor shaft, the bearing cap is arranged on the right side of the bearing, the oil catch is fixedly installed at the end of the bearing cap, the impellers are matched with the outer circle of the rotor shaft, the cylinder body is arranged on the outer sides of the impellers, the steam seal is arranged on the left side of the cylinder body, and the sealing rings II are in inserted fit with the inner wall of the steam seal. In the structure, high-pressure steam forms a backflow on the right side of a fixed block, thereby reducing the impact pressure of the steam; sealing rings III on the left and right sides of the fixed block form a sealing structure with an oil baffle support plate on the left side of the fixed block and a shaft shoulder of the rotor shaft on the right side of the fixed block, thus further preventing the entry of the steam and the leakage of engine oil; and the elastic pressure of a spring platen makes a sealing ring I be fit well with the outer ring of the rotor shaft, thus avoiding the problem of engine oil leakage caused by the wear of the sealing ring I.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a structure for preventing water ingress and oil leakage in steam turbine oil. Background technique [0002] Steam turbine, also called steam turbine engine, is a rotary steam power device. The high-temperature and high-pressure steam passes through the fixed nozzle to become an accelerated air flow and then sprays onto the blades, so that the rotor equipped with blade rows rotates and does work externally at the same time. Steam power is converted into mechanical power. Steam turbines are the main equipment of modern thermal power plants. They have the advantages of high power, high efficiency, and long life. Therefore, they are widely used in metallurgical industry, chemical industry, and ship power plant. [0003] There are many types of steam turbines, and there are many classification methods according to the structure, working principle, thermal performance, applica...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a structure to prevent water ingress and oil leakage in the steam turbine oil, so as to solve the above-mentioned background technology. When it is large, the steam will enter the bearing box after the oil retainer, causing water to enter the bearing box, reducing the quality of the lubricating oil in the bearing box, and endangering the normal operation of the steam turbine rotor. When the oil shield wears too much, it is easy to cause oil leakage from the bearing box, and in severe cases, it will cause a fire accident.

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