A method for establishing an equivalent model of a large steam turbine generator stator end wire rod structure

A steam turbine generator and stator end technology, applied in the field of mechanics and mechanics, can solve the problems of complex wire rod modeling process, lack of reasonable and effective equivalent methods, modeling simplification, etc.

Inactive Publication Date: 2019-06-28
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method for establishing an equivalent model of the wire rod structure at the end of the stator of a large tur

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  • A method for establishing an equivalent model of a large steam turbine generator stator end wire rod structure
  • A method for establishing an equivalent model of a large steam turbine generator stator end wire rod structure
  • A method for establishing an equivalent model of a large steam turbine generator stator end wire rod structure

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Embodiment Construction

[0061] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0062] See Figure 1- Figure 9 , an embodiment of an equivalent model building method for a large turbogenerator stator end bar structure, comprising the following steps:

[0063] Step S1: using a three-point bending test to measure the bending stiffness of the wire rod 1;

[0064]In this embodiment, taking a 600MW two-stage three-phase synchronous turbogenerator as an example, the stator winding has two layers of wire bars, and the upper and lower layer wire bars 11, 12 have a short straight line after protruding from the stator core slot. After that, it is developed into a net-like cone shell structure in the form of an involute along the opposite direction. This design ensures the elevation of the end of the wire rod, the pitch and the equal distance between two adjacent coils to ensure equal and uniform current intensity. Reliable ventila...

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Abstract

The invention discloses a method for establishing an equivalent model of a large steam turbine generator stator end wire rod structure. The method comprises the following steps that S1, actually measuring bending rigidity of a wire rod through a three-point bending test; S2, carrying out entity modeling on a wire rod result; S3, carrying out Boolean operation on the entity model to obtain a geometrical model of the wire rod; S4, researching an equivalent method of the wire rod; S5, verifying the correctness of the equivalent method, if the correctness is correct, executing the subsequent steps, and otherwise, executing the step S4; and S6, obtaining an equivalent model of the wire rod structure. According to the method, the advantages of finite element analysis are utilized to provide a reference scheme for the optimization design of the wire rod structure, and the problems that in the prior art, the wire rod modeling process is complex, and a reasonable and effective equivalent methodis lacked to simplify modeling are solved.

Description

technical field [0001] The invention relates to the field of mechanics and mechanics, and more specifically, relates to a method for establishing an equivalent model of a wire bar structure at the end of a large turbogenerator stator. Background technique [0002] Vibration problems during the operation of turbogenerators may have adverse effects on the service life of turbogenerators. When the generator is running at rated load, the stator end winding is mainly subjected to two kinds of alternating loads. The most important alternating load is the electromagnetic force twice the 50Hz generated by the interaction between the current in the winding and the leakage magnetic field at the end, and the other is the elliptical vibration caused by the stator core bearing the magnetic pull of the rotor. The end winding of a large turbogenerator is a group of huge current-carrying conductors, which will generate a large electromagnetic force in the electromagnetic field environment ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/00
Inventor 王頲白桦赵洋禄盛邓博包小涵刘弋菱
Owner CHONGQING UNIV OF POSTS & TELECOMM
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