Automatic pressure adjuster for main steam supply pipe with shaft seal
A technology of pressure and regulator of the main pipe, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of reducing the vacuum tightness, increasing the burden of the vacuum pump, increasing the randomness of the unit, etc., to improve the vacuum and reduce the leakage. , the effect of stabilizing pressure
Inactive Publication Date: 2011-05-11
山东电力高等专科学校
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Problems solved by technology
[0003] During the operation of the unit, in order to ensure that the steam does not leak into the turbine workshop through the shaft, the pressure of the shaft seal steam header is often adjusted to a low point, so that a little air leaks in, which will greatly reduce the vacuum tightness and increase the vacuum pump. The adjustment of the shaft seal pressure by the operator also increases the randomness of the operation of the unit, which is not conducive to economic operation
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[0013] Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment comprises the pressure equalization box 10 that is communicated with the pressure cylinder, the two ends of the shaft seal steam supply steam pipe 15 on the outlet of the pressure equalization box 10 are connected with an air pipe 16, and the air pipe 16 is connected with the shaft seal steam supply steam pipe 15. Pistons 12 are arranged at both interfaces, an air pump 13 and a pressure transmitter 14 are installed on the air pipe 16; an air release valve 17 is installed on the air pump 13; Flow valve 11.
[0014] In the self-sealing shaft seal system, when the steam turbine high pressure cylinder 1 front and rear shaft seal steam 4, 5 and the medium pressure cylinder 2 front and rear shaft seal steam 6, 7 supply steam to the pressure equalization box 10, the pressure equalization box 10 adjusts the pressure to 0.101~ In the range of 0.113MPa, before the present invention is...
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The invention relates to an automatic pressure adjusting device and particularly discloses an automatic pressure adjuster for a main steam supply pipe with a shaft seal. The automatic pressure adjuster for a main steam supply pipe with a shaft seal comprises a pressure equalization tank communicated with a pressure cylinder and is characterized in that the two ends of a steam supply pipe with a shaft seal on an outlet of the pressure equalization tank are communicated with an air pipe, pistons are arranged at the two connectors of the air pipe and the steam supply pipe with a shaft seal, and an air pump and a pressure transmitter are arranged on the air pipe. The automatic pressure adjuster can effectively reduce air inlet quantity and improve vacuum degree, and meanwhile reduce steam leakage quantity. Therefore, the pressure of the main steam supply pipe with a shaft seal is stabilized, and the economic benefit of power plants is improved.
Description
(1) Technical field [0001] The invention relates to an automatic pressure adjustment device, in particular to an automatic pressure regulator for a shaft seal steam supply main pipe. (2) Background technology [0002] Modern generator sets basically use a pressure equalization box to adjust the steam pressure at about 0.101-0.113MPa, which is slightly higher than atmospheric pressure. The pressure is within a certain range because the pressure of the pressure equalizing box changes with the change of the load, and it is inconvenient to maintain. The purpose is to make the steam supply pressure of the shaft seal slightly higher than the atmospheric pressure, so that the air will not leak into the turbine system. middle. [0003] During the operation of the unit, in order to ensure that the steam does not leak into the turbine workshop through the shaft, the pressure of the shaft seal steam header is often adjusted to a low point, so that a little air leaks in, which will gre...
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IPC IPC(8): F01D17/08
Inventor 陈洁
Owner 山东电力高等专科学校