Exhaust steam cylinder of miniature steam turbine

A steam exhaust cylinder and steam turbine technology, which is applied in the field of steam turbine equipment, can solve the problems of reduced working capacity of the final stage, reduced enthalpy drop of the final stage, and increased pressure, so as to reduce the influence of flow stability and eliminate the influence of steam pressure , The effect of eliminating the influence of work ability
CN102434233AActive Publication Date: 2012-05-02QINGDAO JIENENG STEAM TURBINE GROUP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
QINGDAO JIENENG STEAM TURBINE GROUP CO LTD
Publication Date
2012-05-02

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Abstract

The invention discloses an exhaust steam cylinder of a miniature steam turbine, which comprises a volute and a diffuser, wherein the diffuser comprises an inner deflector and an outer deflector; the volute is arranged on the circumference of the diffuser and comprises an upper wall and a side wall; the width of the volute along the axial direction of the exhaust steam cylinder is bigger than that of the diffuser; the outer deflector is connected with the side wall, and the inner deflector is arranged in the volute; inner wall corners at the connecting part of the upper wall and the side wall and the connecting part of the outer deflector and the side wall are both arc-shaped wall corners; the side face of the inner deflector is a side face consisting of first non-uniform rational spline curves; and the side face of the inner deflector consists of second non-uniform rational spline curves. The exhaust steam cylinder of the miniature steam turbine, provided by the invention, can prevent vortex secondary flow from occurring at the wall corners and eliminate the influence of the vortex secondary flow on steam pressure at the final blade cascade outlet of the miniature steam turbine.
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Description

technical field

[0001] The invention relates to the technical field of steam turbine equipment, in particular to a steam exhaust cylinder of a small steam turbine. Background technique

[0002] The exhaust cylinder of the steam turbine is the channel connecting the outlet of the final stage cascade of the condensing steam turbine and the condenser. The exhaust steam from the cascade is directed into the condenser.

[0003] see Figure 1-Figure 2 , the existing small steam turbine exhaust cylinder includes a diffuser 104 and a volute 102, wherein the diffuser 104 includes an inner deflector 103 and an outer deflector 105; the volute 102 includes an upper wall and a side wall; the volute 102 It is arranged on the outer periphery of the above-mentioned diffuser 104, and its width along the axial direction of the exhaust cylinder is larger than the width of the above-mentioned diffuser 104; the above-mentioned outer deflector 105 is connected with the above-mentioned side wall,...

Claims

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