Optimal Design Method of Sequence Valve of Four High Profile Steam Turbine
An optimized design and steam turbine technology, applied in the field of steam turbines, can solve problems such as unreasonable sequence valve opening sequence, steam turbine failure, and affecting the service life of steam turbines
Active Publication Date: 2021-11-19
CHINA SHENHUA ENERGY CO LTD +4
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Problems solved by technology
[0004] The main purpose of the present invention is to provide a method for optimizing the design of sequence valves of steam turbines with four high-profile valves, so as to solve the problems in the prior art that the sequence valves of steam turbines are unreasonably opened, which leads to failure of the steam turbine and affects the service life of the steam turbine.
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[0033] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.
[0035] In the present invention, in the absence of a contrary statement, the used orientation words such as "up and down" usually refer to the direction shown in the drawings, or refer to the vertical, vertical or gravity direction Similarly, for the convenience of understanding and description, "left and right" usually refer to the left and right shown in the drawings; The words are not used to limit the invention.
[0036] In the present invention, unless...
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The invention provides an optimal design method for a sequence valve of a steam turbine with four high-profile gates. The optimal design method for the sequence valve of the steam turbine with four high-profile doors includes: Step S1: List six opening sequences based on the four high-profile doors; Step S2: Establish the geometric model of the four high-profile doors, and import the four geometric models into the fluid mechanics analysis software pre-processing; step S3: solve the finite element model of four high-profile doors under six valve sequence combinations; step S4: extract the evaluation parameter indicators in the finite element analysis software to analyze and compare the six valve sequence combinations and The blades of the regulating stage are stressed under different working conditions; step S5: According to the comparative analysis of step S4, the optimal valve sequence combination is given, and experimental research is carried out under the premise of theoretical calculation to verify the accuracy and accuracy of theoretical calculation. The invention effectively solves the problems in the prior art that the sequence valve opening sequence of the steam turbine is unreasonable, which leads to failure of the steam turbine and affects the service life of the steam turbine.
Description
technical field [0001] The invention relates to the technical field of steam turbines, in particular to an optimal design method for a sequence valve of a four-high profile steam turbine. Background technique [0002] At present, steam turbines adopt a compound steam distribution method, that is, the nozzle is adjusted at rated load, and the throttling is adjusted at low load. However, although this steam distribution method has the advantages of uniform heating of the flow-through parts of the steam turbine and small thermal stress, when it operates in the low-load range, the throttling loss of the valve is large, and the unit operation is not economical. [0003] In the existing technology, in order to improve the above-mentioned disadvantages, consider optimizing the way of steam turbine adjustment and steam distribution, increase the steam intake mode of the sequence valve, and find the best sliding pressure curve of the main steam pressure through the sliding pressure t...
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IPC IPC(8): F01D17/16G06F30/23G06F119/14
CPCF01D17/16G06F30/23G06F2119/06
Inventor 郑恒刘福东王青华沈润杰祝建飞李志龙韩朝兵赵卫华
Owner CHINA SHENHUA ENERGY CO LTD