A rear structure of a tubular high-pressure cylinder of a steam turbine

Abstract

The invention discloses a rear structure of a barrel-shaped high-pressure cylinder of a steam turbine, which is characterized in that it includes a guide body, and the guide body is installed on the high-pressure outer cylinder seal body so that it is located between the high-pressure final-stage moving blade and the high-pressure outer cylinder seal. between the high-pressure final-stage moving blades and the high-pressure outer cylinder seal body; the guide body is divided into several guide body sections along the circumferential direction, which are respectively installed on the upper and lower halves of the high-pressure cylinder; The mounting parts of the guide body sections are T-shaped structures, and each T-shaped structure is installed in the corresponding T-shaped groove on the high-pressure outer cylinder seal body. The structure is simple and reliable, the installation and disassembly are simple and easy, and the production and installation costs are low. It can effectively reduce the eddy current of the steam at the rear of the high-pressure cylinder, reduce the loss of steam, and improve the economy and efficiency of the high-pressure cylinder.

Description

technical field [0001] The invention relates to a steam turbine high-pressure cylinder, in particular to a rear structure of a steam turbine cylindrical high-pressure cylinder. Background technique [0002] The cylindrical high-pressure inner cylinder structure has no horizontal mid-section flange, the upper and lower cylinders are semi-cylindrical structures, and the upper and lower half cylinders are tightened by red collars. The structural design of the cylindrical cylinder can reduce the volume of the high-pressure outer cylinder. The cylinder assembly is completed in the manufacturing plant, and the high-pressure module is shipped to the power plant as a whole, which can ensure the assembly accuracy and effectively prevent the steam leakage caused by the partial deformation of the cylinder during operation. . Due to the above-mentioned advantages of the cylindrical cylinder, more and more steam turbine units adopt the structural design of the cylindrical cylinder. How...

AI Technical Summary

Problems solved by technology

However, if figure 1 As shown, when the cylindrical cylinder module is assembled, the high-pressure rotor and the high-pressure inner cylinder 1 need to be assembled and then integrated into the high-pressure outer cylinder 5. Due to the limitation of the assembly structure, there is a gap between the high-pressure final stage moving blade 3 and the high-pressure outer cylinder seal body 2. There is a large space 6, and when the high-pressure steam flows out from the high-pressure final stage moving blade 3, a vortex will be generated in this space, which affects the economy and efficiency of the high-pressure cylinder

Images