Unlock instant, AI-driven research and patent intelligence for your innovation.
System and Method for Automatic Mesh Division of Steam Turbine Rotor
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A steam turbine rotor, automatic division technology, applied in the direction of instrument, geometric CAD, design optimization/simulation, etc., to meet the requirements of rotor strength design, good calculation accuracy, and easy for secondary development.
Active Publication Date: 2021-07-13
HARBIN TURBINE +1
View PDF3 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] In order to solve the problem that the grid division that can guarantee the accuracy of finite element simulation for steam turbine rotors of different sizes cannot be performed under the condition of less calculation amount, the present invention
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
[0057] The rotor model feature acquisition module automatically collects and imports the feature information of the rotor model, including the coordinates of each end point of the rotor model, the length and angle of each feature side, and other feature information;
[0058] The eigenvalue analysis module numbers each characteristic edge and characteristic node and classifies the characteristic edges according to the characteristic coordinates, and at the same time obtains the length information of each characteristic edge, and compares the length n of each characteristic edge with the length n of the preceding characteristic edge 2 , the length of the rear feature side n 3 Compare to get the pre-feature ratio post feature ratio
[0059] Feature side distribution module, the pre-feature ratio R 1 and post-characteristic ratio R 2 Enter the logic library to find the most suitable seeding method, and contro...
specific Embodiment approach 2
[0076] The method for automatically dividing the grid of the steam turbine rotor includes the following steps:
[0077] Step 1. Apply modeling software such as UG to establish a rotor model;
[0078] Rotor models with different properties can be established according to the rotor form. For T-shaped blade roots and double-T-shaped blade roots, a two-dimensional axisymmetric model can be established, and for a palm-shaped leaf root, a three-dimensional circular symmetric model can be established; the established The rotor model is stored in stp format and imported into the steam turbine rotor mesh automatic division system;
[0079] Step 2, feature classification and feature value analysis:
[0080] Step 2.1, automatically collect the characteristic information of the imported rotor model, including the coordinates of each end point of the rotor model, the length of each characteristic side, angle and other characteristic information;
[0081] Step 2.2. Number each characteris...
specific Embodiment approach 3
[0103] The limiting maximum deviation factor described in step 2 of this embodiment is 0.1.
[0104] Other steps and parameters are the same as in the second embodiment.
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
Login to View More
Abstract
The invention provides a system and method for automatic grid division of a steam turbine rotor, relating to a grid division system and method. In order to solve the problem that it is currently impossible to perform mesh division to ensure the accuracy of finite element simulation for different sizes of steam turbine rotors. The invention includes a rotor model feature acquisition module for collecting and importing feature information into the rotor model; a feature value analysis module for numbering feature edges and feature nodes and classifying feature edges according to feature coordinates; Find the most suitable seeding method in the input logic library, and control the curvature of the seeds and be responsible for the feature edge seeding module of the feature edge seeding; compare the pre-features with R 1 and post-characteristic ratio R 2 A logic library for logical judgment; a grid division module for dividing hexahedral grids for feature models and restricting geometric eccentricity factors; a grid information storage module for storing the node numbers used to divide subunits into the unit database. The invention is suitable for the automatic grid division of the steam turbine rotor.
Description
technical field [0001] The invention relates to a grid division system and method, in particular to a steam turbine rotor grid automatic division system and a division method. Background technique [0002] The finite element method has now become an important means of calculating the strength of the steam turbine rotor in the steam turbine industry. Mesh division, as a limiting condition for the calculation accuracy of the finite element, has also been paid more and more attention. grid. At present, the domestic steam turbine rotor grid division is still in the manual division stage, and the rotor automatic grid division system is still in a blank stage. The main reason is: the structure of the steam turbine rotor is complex and the form is not uniform, and there are many functional structures, so it is impossible to establish a unified The large size and small size of the steam turbine rotor differ by more than an order of magnitude, so it is impossible to form a unified s...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More