Steam supplementing chamber structure of steam turbine cylinder

Abstract

The invention discloses a steam supplementing chamber structure of a steam turbine cylinder, and belongs to the technical field of steam turbines. The steam supplementing chamber structure of the steam turbine cylinder comprises an annular main steam flow channel formed between the cylinder and a rotor; a mixing ring cavity is formed in the cylinder in the circumferential direction of the cylinder; the outer side of the mixing ring cavity communicates with a steam supplementing channel; the inner side of the mixing ring cavity communicates with the main steam flow channel through a flow guide ring cavity; the flow guide ring cavity inclines towards the main steam flow flowing direction of the main steam flow channel; a plurality of flow guide partition plates are arranged in the flow guide ring cavity in the circumferential direction of the flow guide ring cavity; and the flow guide ring cavity is divided into a plurality of sub-cavities by the plurality of flow guide partition plates. According to the invention, the mixing degree and the mixing loss of the supplemented steam and the main steam flow can be reduced, and the influence of the supplemented steam on the stability of the rotor can be reduced.

Description

technical field [0001] The invention relates to a steam supplement chamber structure of a steam turbine cylinder, belonging to the technical field of steam turbines. Background technique [0002] As the main power device, the steam turbine is widely used in various fields. Therefore, high efficiency and cleanliness have become the key indicators for the operation of the steam turbine. It is widely used in high-power units. [0003] High-power steam turbines often introduce supplementary steam flow from the supplementary steam chamber of the cylinder to increase output power, but the steam entering the steam turbine through the supplementary steam chamber (called supplementary steam) will cause damage to the original main steam (main steam flow) in the steam turbine. Disturbance, on the one hand, there will be a mixing loss with the original main steam, which will change the distribution of the inlet steam parameters of the downstream static cascade along the circumferential...

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Problems solved by technology

[0003] High-power steam turbines often introduce supplementary steam flow from the supplementary steam chamber of the cylinder to increase output power, but the steam entering the steam turbine through the supplementary steam chamber (called supplementary steam) will cause damage to the original main steam (main steam flow) in the steam turbine. Disturbance, on the one hand, there will be a mixing loss with the original main steam, which will change the distribution of the inlet steam parameters of the downstream static cascade along the circumferential direction, resulting in inhomogeneity, increasing the loss of the downstream static cascade, and affecting the efficiency of the unit. Will increase the vibration of the rotor

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