Non-circular gear dynamic contact characteristic analysis method based on tooth surface topological structure
A topology, non-circular gear technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., to avoid complex programs, high precision, and avoid writing and solving.
Active Publication Date: 2021-02-09
LANZHOU UNIVERSITY OF TECHNOLOGY
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There are many studies on gear meshing simulation using LS-DYNA, but most of them are aimed at commonly used cylindrical gear pairs and helical gear pairs, and there are few studies on non-circular gears. In the article "Research", the meshing impact problem of the spur gear pair was studied by using LS-DYNA software; in the article "Analysis of the dynamic meshing characteristics of spur gears based on LS-DYNA", the dynamic meshing process of the gear pair was simulated by using the LS-DYAN software ; In the article "Analysis of Dynamic Contact Characteristics of Elliptical Cylindrical Gears under Different Load Conditions", the dynamic meshing process of elliptical cylindrical gears was simulated by using Ls-Prepost software, which laid the foundation for the meshing simulation of non-circular gears
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[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0043] This embodiment provides a method for analyzing the dynamic contact characteristics of non-circular gears based on tooth surface topology, including the following steps:
[0044] Step 1: Design non-circular gear pair in KISSsoft, input parameters: modulus m=3, number of teeth z1=z2=47, pressure angle α=20°, tooth width b=30, pitch curve equation r=64.667 / 1-0.3287 cos(θ), after setting parameters, generate as figure 2 The two-dimensional model of the non-circular gear pair shown; save the two-dimensional model of the non-circular gear pair in iges format.
[0045] Step 2: Import the iges format file generated in step 1 into Creo, create a new part, and stretch the imported 2D model of the non-circular gear pair. The stretch height is 30m...
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The invention discloses a non-circular gear dynamic contact characteristic analysis method based on a tooth surface topological structure, which belongs to the field of gear engagement. The method comprises the steps of firstly, using KISSsoft software for generating an accurate two-dimensional model of the non-circular gear, generating a three-dimensional model of the non-circular gear in Creo three-dimensional software, and building a tooth surface topological structure and a corresponding coordinate identifier, importing into Hypermesh software to carry out gear mesh division, so that the tooth surface mesh nodes are matched with the topological structure, and finally, defining boundary conditions in LS-DYAN software, simulating a gear to rotate for a circle under a bearing condition, and finally, solving the model. And the change trends of tooth surface stress, strain, pressure, displacement and speed of the gear teeth in the meshing process are obtained. According to the method, writing and solving of complex programs in the non-circular gear dynamic contact characteristic analysis process are reduced and avoided, workloads and resources are saved, and a basis is provided fornon-circular gear dynamic contact analysis.
Description
technical field [0001] The invention belongs to the technical field of gear meshing analysis, in particular to a method for analyzing the dynamic contact characteristics of non-circular gears based on tooth surface topology. Background technique [0002] Non-circular gears are a special kind of cylindrical gears, which are distinguished from cylindrical gears by their non-circular pitch curves; non-circular gears mainly include non-cylindrical gears, non-circular helical gears, non-circular gears, non-conical bevel gears, etc. Non-circular gears are compact in structure and can realize variable ratio transmission. They are mainly used in low-speed and high-torque occasions, such as hydraulic pumps, hydraulic motors, flow meters, etc. The time-varying nature of the curvature radius of pitch curve and tooth profile of non-circular gears leads to inconsistent tooth profiles at different positions on the pitch curve, and the left and right tooth profiles of each tooth are also d...
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IPC IPC(8): G06F30/17G06F30/23G06F119/14
CPCG06F30/17G06F30/23G06F2119/14
Inventor 董长斌刘永平员贝贝魏永峭李大伟尹煜鑫
Owner LANZHOU UNIVERSITY OF TECHNOLOGY