大型往复压缩机的试验装置投入成本非常高,如果开发出来的试验装置只测试某一特定机型或者适用机型范围很小,那么会造成资源的浪费.因此,针对大型往复压缩机的试验装置适用范围的问题,提出了一种往复压缩机试验装置适用机型范围的评估模型.通过对试验装置原理进行分析,表明对试验装置适用范围起主导作用的因素为进口管路和出口管路的相关参数.这些参数包括管材、管径、管壁厚度、管壁附加量和管内气体压力.该模型通过建立管路内气体压力、流速等约束关系,求解不同压力工况下的试验装置排量,从而确定试验装置的适用范围,最终实现对试验装置的评估.将该模型应用于某试验装置适用机型范围的评估,实例分析表明该试验装置具备较大的适用范围,能够对127种统计机型中的64.6%进行试验.进一步分析表明:管路气体流速是限制低压大排量机型适用的主要因素.研究表明该模型可为试验装置设计提供参考依据,提高试验装置的利用效率.%The economic cost of large type of reciprocating compressor test rig is very high. If the test rig was designed for only a par-ticular type compressor or its application scope was very small, the money and resources for the test rig would be greatly wasted. Therefore, in view of the problem about application scope of large type of reciprocating compressor test rig, an evaluation model of the reciprocating compressor test rig application scope was proposed in this paper. According to the analysis of the principle of test rig, it could be concluded that the major factors influencing the application scope of test rig are the relative parameters of inlet pipe and outlet pipe, including pipe material, pipe diameter, pipe thickness, attached pipe thickness and gas pressure in pipe. Moreover, the constraint relationship of gas pressure and gas velocity in the pipeline was established in the proposed model to calculate the dis-placement of the test rig under different pressure conditions. Thus, the application scope of test rig could be confirmed and evaluation of test rig could be realized. Finally, the model was applied to evaluate the application scope of a test rig. The case study indicates that the test rig has a large application scope that 64.6% of 127 kinds of statistical compressor types could be experimented on the test rig. Moreover, further study shows that gas velocity in the pipeline is the main factor restricting application of low pressure-large volume flow compressor. And it can be concluded that the model can provide a reference basis for test rig, which will improve the u-tilization efficiency of test rig.
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