Steam turbine and full-arc admission asymmetric steam distribution method

A full-cycle steam intake and steam turbine technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as increased throttling loss, vibration of steam intake regulating valve, and deterioration of steam turbine economy and reliability. Achieve the effect of reducing heat consumption, reducing throttling loss and avoiding vibration

Active Publication Date: 2018-07-03
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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Problems solved by technology

As a result, under low-load conditions, the steam inlet regulating valves on both sides of the cylinder are in a small opening position, which increases the throttling l

Method used

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  • Steam turbine and full-arc admission asymmetric steam distribution method
  • Steam turbine and full-arc admission asymmetric steam distribution method

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[0020] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, not to limit the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as limiting the inventio...

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Abstract

The invention relates to the technical field of steam turbines, in particular to a steam turbine full-arc admission asymmetric steam distribution method and a steam turbine adopting the same. The steam turbine full-arc admission asymmetric steam distribution method comprises the following steps that when the steam turbine is in a rated design working condition, a plurality of admission regulatingvalves of an air cylinder are opened and synchronous admission is achieved; and when the steam turbine is in a low-load working condition, under a preset load, at least one of a plurality of admissionregulating valve is closed and at least one admission regulating valve is started. The steam turbine comprises the air cylinder, a plurality of admission interfaces, the plurality of admission regulating valves and a control system, wherein the admission interfaces are arranged on the air cylinder, the admission regulating valves are arranged on the admission interfaces in a one-to-one correspondence mode, the control system is connected with the admission regulating valves simultaneously, and the control system is used for controlling the multiple admission regulating valves to be opened atthe same time or at least one to be opened and at least one to be closed. According to the full-arc admission asymmetric steam distribution method, the stable operation under the low-load working condition can be guaranteed, throttling losses are reduced, the vibration of the admission regulating valves is avoided, and the reliability and the economical efficiency of a unit are improved

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a method for asymmetrical distribution of steam in all circumferences of a steam turbine and a steam turbine adopting the method for asymmetric distribution of steam in all circumferences. Background technique [0002] In the prior art, the full-circumference steam turbine usually adopts the steam distribution method of synchronous adjustment of two groups of steam distribution mechanisms arranged symmetrically and equal in size to control and adjust the steam entering the steam turbine cylinder. As a result, under low-load conditions, the steam inlet regulating valves on both sides of the cylinder are in a small opening position, which increases the throttling loss on the one hand, and on the other hand causes the steam inlet regulating valve to Vibration, thus deteriorating the economy and reliability of the steam turbine unit. Contents of the invention [0003] The t...

Claims

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Application Information

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IPC IPC(8): F01D17/10
CPCF01D17/105
Inventor 胡志强杨建道黄庆华徐嗣华肖蕾何劲李月月
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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