Steam inlet chamber for axial steam discharge of steam turbine

Abstract

The invention discloses a steam inlet chamber for axial steam discharge of a steam turbine and belongs to the technical field of steam turbines. According to the steam inlet chamber for the axial steam discharge of the steam turbine, a steam flow channel defined by the inner wall face of the steam inlet chamber comprises inflow channels, expansion flow guide channels and an outflow channel capable of achieving axial steam discharge. The outflow channel is in a circular ring shape, and in the peripheral direction of the inlet end of the outflow channel, the inlet end of the outflow channel is communicated with the outlet ends of the multiple expansion flow guide channels; each expansion flow guide channel is distributed along the periphery of the outflow channel and is in a diffusive volute shape, and the sectional area of each expansion flow guide channel is gradually and smoothly increased from the inlet end to the outlet end of the expansion flow guide channel; the inlet end of each expansion flow guide channel is communicated with the outlet end of one inflow channel; and at the communication parts of the plurality of expansion flow guide channels and the outflow channel, the outlet ends of the adjacent expansion flow guide channels are separated by anti-turbulence partition plates arranged in the steam inlet chamber. According to the steam inlet chamber, steam flow pressure loss in the steam inlet chamber can be reduced, and the flow field uniformity of axial steam discharge of the steam inlet chamber is improved.

Description

technical field [0001] The invention relates to a steam inlet chamber used for axial steam outlet of a steam turbine, belonging to the technical field of steam turbines. Background technique [0002] The steam turbine is an indispensable power device for thermal power and nuclear power, and the steam inlet chamber has a special position among the components that determine the economy and reliability of the steam turbine unit. Existing studies have shown that for every 1% increase in the pressure loss of the inlet chamber, the efficiency of the high-pressure cylinder will decrease by about 0.4%, and under certain working conditions, the inlet chamber will not only have a large energy loss, but may also cause flow field turbulence. It leads to accidents such as large rotor vibration and unit shutdown. [0003] With the continuous improvement of the parameters of the working medium, the steam inlet chamber is more and more important to the economical and safe operation of the ...

AI Technical Summary

Problems solved by technology

Existing studies have shown that for every 1% increase in the pressure loss of the inlet chamber, the efficiency of the high-pressure cylinder will decrease by about 0.4%, and under certain working conditions, the inlet chamber not only has a large energy loss, but also may cause flow field turbulence, Cause accidents such as large rotor vibration and unit shutdown

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