中北大学防爆柜及有限元分析毕业设计说明书

一种矿用隔爆滤波型变频器隔爆柜子的结构分析

摘要

随着计算机技术的高速发展，有限元技术在现代设计中应用越来越广泛。有限元技术具有计算速度快，精度高的特点。通过有限元分析计算，设计人员在设计阶段就能了解到构件的应力、应变及位移，同时可以方便的对构件反复修改，达到优化结构的目的。

矿用隔爆滤波型变频器隔爆柜子是放在煤矿井下的电机控制柜。箱体必须有足够的强度和刚度，以防止变频器发生爆炸时，能承受其瞬间产生的强大爆炸力。箱体在传统设计中，多采用类比法或凭经验设计，这样设计出来的产品，其受力情况设计者心中无数，往往造成产品不合格或材料浪费现象。增加了制造成本，延长了制造周期。因此，在某种有限元的支持下，对变频器箱体进行受力分析，检验其强度和刚度是否满足要求，对提高变频器箱体的技术水平，快速响应市场，降低成本具有十分重要的意义。

在此背景下，本文以山西防爆电机有限公司设计的矿用隔爆滤波型变频器防爆柜作为研究对象，对其柜体进行有限元分析。完成的主要工作包括：（1）认真学习研究煤炭安全标准；（2）利用三维建模软件Solidworks对箱体进行实体建模；（3）利用有限元分析软件Simulation对箱体进行静态分析，通过分析计算，显示出箱体的变形情况，同时可以得出箱体任意位置的应力值和位移值。并针对每次计算结果，对箱体进行适时改进。

关键词：防爆柜；有限元；应力；应变；优化；

A mining explosion-proof filter inverter flameproof cabinet

structure analysis

Abstract

With the rapid development of computer technology, the Finite Element Method(FEM) is widely used in modern design. FEM is a method of high speed and high precision. The stress, strain and displacement can be obtained with the Finite Element Analysis (FEA) in the design stage. And it is convenient to modify and optimize the structure.

Mining flame-proof filtering type transducer explosion-proof cabinet is used in coal mine. The explosion-proof cabinet should have enough strength and stiffness, and should be able to endure the tremendous blast-force during the moment gas blasts. Traditionally, the explosion-proof cabinet design always relies on analogy and experience. The designer can’t know the deformation of the the explosion-proof cabinet, and which may make the product disqualification, or wasting material or high developing cost, and longer designing and manufacturing cycle. Therefore, it has great significance to find a new approach to analyze and calculate the mechanical model of cabinet, check its strength and stiffness based on a certain FEM software. Thus it can improve the technique of cabinet design, speed up the response to the market requirement and reduce the cost.

This paper investigated the explosion-proof cabinet designed by Shan Xi Explosion proof motor company. The cabinet was analyzed by FEM. The major works completed mainly included: (1) The fundamentals on FEM were discussed; (2) The solid model of the cabinet was created by 3D design software SolidWorks. (3) The Nonlinear Finite Element model was built and calculated by FEM software Simulation. Through calculation and analysis, the deformation of the transformer cabinet was obtained. Meanwhile, the stress and displacement of every element were also obtained.

Key Words:Explosion-proof cabinet; the Finite Element Method; Stress; Strain ；Optimization ；