High-efficiency steam turbine

Abstract

The invention discloses a high-efficiency steam turbine. The high-efficiency steam turbine comprises a steam exhaust housing and a high-speed shaft assembly, wherein the steam exhaust housing is of anintegral structure; a steam exhaust flow channel in the steam exhaust housing adopts a symmetrical equal-ring-quantity flow channel; a steam inlet cover is mounted at the front end of the steam exhaust housing; a vertical gear box is mounted at the rear end of the steam exhaust housing; a vertical gear box rear cover is mounted at the rear end of the vertical gear box; the high-speed shaft assembly is supported in the vertical gear box and the vertical gear box rear cover; the high-speed shaft assembly comprises a high-speed gear shaft and a multi-stage impeller; the multi-stage impeller is fixed at the front end of the high-speed gear shaft; a multi-stage nozzle ring seat is arranged in the steam exhaust housing and between the steam exhaust housing and the steam inlet cover; a multi-stage nozzle ring is arranged on the multi-stage nozzle ring seat; the multi-stage nozzle ring and the multi-stage impeller are alternately arranged in the axial direction; and the multi-stage nozzle ring seat, the multi-stage nozzle ring and the multi-stage impeller are pushed into the steam exhaust housing from front to back in the axial direction and are fixedly mounted with the high-speed gear shaft; and a low-speed shaft is arranged below the high-speed gear shaft in parallel, the low-speed shaft is arranged in the vertical gear box and the vertical gear box rear cover, and one end of the low-speed shaft extends out of the vertical gear box rear cover and is used for outputting torque.

Description

technical field [0001] The invention belongs to the technical field of steam turbines and relates to a high-efficiency steam turbine. Background technique [0002] The working speed of the conventional steam turbine is 1500-10000r / min, the overall structure of the cylinder is a horizontal split and vertical split structure, and the bearing is an internal support structure at both ends. The required working speed is low, so the large-diameter, multi-stage impeller structure is usually used to realize power transmission. Due to the influence of the designed wheel diameter and speed of the steam turbine, the volume of the steam turbine is large. Due to the split structure, most of the steam turbines are partially steam-intake. Large intake steam loss. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a low-power low-pressure steam turbine for fixed operating parameters, which is suitable for ...

AI Technical Summary

Problems solved by technology

[0002] The working speed of the conventional steam turbine is 1500-10000r / min, the overall structure of the cylinder is a horizontal split and vertical split structure, and the bearing is an internal support structure at both ends. The required working speed is low, so the large-diameter, multi-stage impeller structure is usually used to realize power transmission. Due to the influence of the designed wheel diameter and speed of the steam turbine, the volume of the steam turbine is large. Due to the split structure, most of the steam turbines are partially steam-intake. Big steam loss

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