Optimization for Compressor Crankshaft by Multi-Body Dynamics Analysis Method

doi:10.7652/xjtuxb201703002

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Optimization for Compressor Crankshaft by Multi-Body Dynamics Analysis Method

更新时间：2025-07-09

- Optimization for Compressor Crankshaft by Multi-Body Dynamics Analysis Method
- Vol. 51, Issue 3, Pages: 7-13(2017)
- 作者机构：
  
  大连交通大学动车运用与维护工程学院,辽宁,大连,116028
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201703002
  CLC： TH457:TB652
- Online First：10 March 2017，
  
  Published：2017
- 稿件说明：
移动端阅览
Optimization for Compressor Crankshaft by Multi-Body Dynamics Analysis Method[J]. 2017, 51(3): 7-13.
DOI：

Optimization for Compressor Crankshaft by Multi-Body Dynamics Analysis Method[J]. 2017, 51(3): 7-13. DOI： 10.7652/xjtuxb201703002.

摘要

以小型活塞式压缩机为研究对象

提出了降低曲轴系统扭振幅值、提高曲轴强度、轻量化曲轴的优化设计方法。在考虑电机转动惯量影响的同时建立了曲轴系统多体动力学模型

利用正交试验方法从多个设计参数中筛选出影响曲轴系统扭振和强度性能的显著因子

并在显著因子和曲轴系统一个周期内的最大扭转角、峰值应力及质量下拟合了二阶响应面模型

采用非劣排序遗传算法(NSGA-II)对二阶响应面拟合模型进行了优化。通过对某W型活塞式压缩机平衡重过渡圆角半径、曲轴偏心距和曲柄厚度进行优化显示

压缩机曲轴质量、自由端扭转角、峰值应力与初始值相比分别下降了11.31%、22.9%、25.10%

表明优化后曲轴系统的扭振幅值下降

质量减轻

强度提升。研究结果可为优化压缩机设计、提高曲轴的性能提供参考。

Abstract

An optimization design for the crankshaft of small reciprocating compressors is proposed aiming at reducing the torsional vibration

improving the strength and reducing the mass of the crankshaft system. A multi-body dynamic model of the crankshaft is established considering the motor moment inertia

and the orthogonal test is applied to determine the most remarkable factors affecting vibration and strength of the crankshaft system. A second-order response surface model is constructed by fitting the parameters of the selected remarkable factors

i. e. maximum torsional angular

mass and peak stress during every working cycle. All second-order analytic models are optimized with non-dominated sorting genetic algorithm. A case of W-type reciprocating compressors is investigated

where the parameters of the round radius of the counterweights

the eccentric distance

and the crank thickness are optimized

and the mass

the torsional angular and the peak stress are then reduced by 11.31%

22.9% and 25.10% respectively. The optimal results show that the crankshaft mass and torsional vibration amplitude are reduced

and the strength is improved.

关键词

Keywords

references

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