Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Finite Element Accurate Modeling Method for Large Turbine Generator Stator Bars

A technology for turbogenerators and stator bars, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of inconsistent structure of actual bars, time-consuming and laborious modification, easy confusion of models, etc., to achieve omission 3D solid modeling, easy loading, and reduced modeling workload

Active Publication Date: 2018-01-02
SHANGHAI ELECTRICGROUP CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a finite element accurate modeling method for the stator bar of a large turbogenerator to solve the above-mentioned difficulties in analysis and modeling, the modification is time-consuming and laborious, and it is easy to be confused when building the model, which does not match the actual bar structure The problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Finite Element Accurate Modeling Method for Large Turbine Generator Stator Bars
  • A Finite Element Accurate Modeling Method for Large Turbine Generator Stator Bars
  • A Finite Element Accurate Modeling Method for Large Turbine Generator Stator Bars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] See Figure 1-10 As shown, a finite element accurate modeling method of a large turbogenerator stator bar is characterized in that the steps of the method are:

[0029] Step 1: According to the size requirements of the drawing, establish a conic curve plane expansion diagram, and obtain the basic parameters: base circle radius R a , the starting radius R of the starting arc A , starting and ending arc radius r 1 、r 2 , the central angle φ corresponding to the starting point of the involute, and the span angle γ of the expansion line; at the same time, the plane expansion curve is discretized into a series of points and their coordinates are saved (such as Figure 5 shown), and then generate the corresponding key points in the finite element software ANSYS; then use the spline command to connect the above key points, and establish the conic involute, transitional arc and end straight segment of the line bar axis to obtain the line bar A two-dimensional model of the a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a finite element accurate modeling method for a stator bar of a large turbogenerator, wherein the steps of the method are as follows: Step 1: Obtain a two-dimensional model of the bar axis according to the size requirements of the drawing; Step 2 : Use the conical envelope method to establish a three-dimensional geometric model of the wire rod axis; Step 3: Divide the section into many small rectangles according to the position of each material in the wire rod and the geometric shape of each layer structure, so that the direction of the section is centered; Step 4: After the section with the correct direction is generated at each key point on the three-dimensional space curve, the corresponding nodes on the adjacent sections are connected in turn to generate hexahedral elements to form a complete three-dimensional finite element model of wire rod. The invention proposes a three-dimensional finite element modeling method for wire rods based on finite element software and conical envelope algorithm, which omits three-dimensional solid modeling and simplifies analysis steps; provides an efficient and accurate three-dimensional method for large-scale turbogenerator stator wire rods Finite Element Modeling Method.

Description

technical field [0001] The invention relates to the technical field of a modeling method, in particular to a finite element accurate modeling method for a stator bar of a large turbogenerator. Background technique [0002] Turbogenerators play an important role in the supply of modern electric energy. With the development of turbogenerators in the direction of large capacity and high power, large currents and magnetic fields will be generated inside them. The structure of the stator end is loose, and the vibration is aggravated. Therefore, it is necessary to carry out modal, electromagnetic and other vibration analysis on the end structure of the turbogenerator, and propose methods to prevent and solve the vibration problem at the end of the generator. In finite element analysis, the model of the object to be analyzed should be obtained first. For turbogenerators, the stator end structure is complex, especially the stator bar winding, which has a basket structure, and the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 张青雷郭井宽陈吉杜跃斐赵清龙亚文桂士弘
Owner SHANGHAI ELECTRICGROUP CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com