PC型单螺杆压缩机主要几何关系的分析  

Main Geometric Analysis of PC-type Single-screw Compressor

作　　者：智瑞平 吴玉庭[1] 王伟[1] 王景甫[1] 马重芳[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《北京工业大学学报》2017年第10期1545-1553,共9页Journal of Beijing University of Technology

基　　金：国家"973"计划资助项目(2013CB228306)

摘　　要：为了解决PC型单螺杆压缩机设计中理论输气量、排气压力和耗功的计算问题,对其螺槽容积、扭矩数学模型、封闭螺旋线和排气孔口进行了研究.首先对PC型单螺杆啮合过程中,星轮齿的侵入面积和形心进行了公式推导;其次建立了单螺槽容积、密闭螺槽容积、任意时刻螺槽容积和扭矩的数学模型,给出了封闭螺旋线及排气孔口大小的公式.并且以螺杆直径为117 mm的PC型单螺杆压缩机为例,分析结果表明:利用Pro/E软件建立了单螺槽的实体模型,测量体积发现与计算体积误差在3.771%左右;瞬时扭矩随着进气压力的不同呈现周期性变化;扭矩比值接近1,并且扭矩比与进气压力无关.为PC型单螺杆压缩机的设计和计算提供理论依据.In order to obtain the theoretical displacement,discharge pressure and power consumption when design the PC-type single screw compressor（ SSC）,the main geometric analysis of PC-type SSC has been carried out in this paper. By analyzing the intermeshing area formed by gate rotor tooth and groove of screw rotor and centroid distance,the mathematical models of groove volume and torque were presented for PC-type SSC. Analysis of a typical PC-type SSC with 117 mm diameter rotor shows that the calculated entire single groove volume has good consistency with that measured by 3D Pro/E software,with percentage error about 3. 771%,the periodic variation of instantaneous torque is the same for different inlet pressure levels,the torque ratio,with its value close to 1,is independent of the inlet pressure of SSC and that the power consumption increases with increase of inlet pressure. Results from the established mathematical models of groove volume and torque is of great importance for engineers to design and manufacture the PC-type SSC.

关 键 词：单螺杆压缩机 螺槽容积 扭矩 

分 类 号：TH45[机械工程—机械制造及自动化]