Experimental investigation on valve impact velocity and inclining motion of a reciprocating compressor
Experimental investigation on valve impact velocity and inclining motion of a reciprocating compressor
复制标题
往复式压缩机阀门冲击速度与倾斜运动的实验研究
DOI：
10.1016/j.applthermaleng.2013.07.046
复制
发表时间：
2013-11-03
影响因子：
6.4
通讯作者：
Peng, Xueyuan
中科院分区：
文献类型：
--
作者：
Wang, Yu;Xue, Chuang;Peng, Xueyuan
往复式压缩机的工作循环导致压缩机阀门的周期性冲击。为了找出冲击应力过大的主要原因，本文对阀门动力学尤其是倾斜角度和冲击速度进行了实验研究。对吸入和排出环阀进行了重新设计，在阀环顶部安装了三个位移传感器来测量环的瞬时3D运动，在此基础上通过改变阀门安装位置、间隙、工况和转速来识别影响阀门运动的主要因素。阀门打开时几乎不会发生倾斜运动，而排出阀关闭时会发生剧烈的倾斜运动。当压力比大于2.55时，由于排放过程的时间跨度较短，倾斜角度变得不确定。开阀时刻的活塞速度和压缩室容积对最大冲击速度有直接影响。随着压力比和转速的增加，其增加较快，而阀门安装位置和间隙对最大冲击速度影响不大。该实验测量方法和结果可以为阀门测试和阀门可靠性优化提供有用的信息。 (C) 2013 Elsevier Ltd. 保留所有权利。
The working cycle of a reciprocating compressor results in the periodic impact of compressor valves. In order to find out the main cause for the excessive impact stress, this paper presents an experimental investigation on the valve dynamics especially the inclining angle and the impact velocity. The suction and discharge ring valves were redesigned and three displacement sensors were installed on top of the valve rings to measure the rings' instantaneous 3D motions, based on which the main factors that influenced the valve movements were identified by varying the valve installation position, clearance, working condition and the rotational speed. The inclining motion hardly happens as the valve is opening, while severe inclining motion takes place when the discharge valve is closing. When the pressure ratio is larger than 2.55, the inclining angle becomes uncertain because of the short time span of discharge process. The piston velocity and the volume of compression chamber at the valve opening moment have a direct impact on the maximum impact velocity. It displays a quick increase with the increase of pressure ratio and rotational speed while the valve installation position and the clearance have little influence on the maximum impact velocity. This experimental measuring method and results could provide useful information for both valve testing and optimization of valve reliability. (C) 2013 Elsevier Ltd. All rights reserved.