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1、一、 设计条件设计题目：设计一台家用空调全封闭滚动转子式制冷压缩机要求：热力计算和动力计算(转子受力分析)，做出结构简图设计条件：汽缸直径D（mm）：54 相对气缸长度： 0.8相对偏心距： 0.09滑片厚度b2e相对余隙容积c：1.2吸气孔口前边缘角：3035转速n：2980r/min制冷剂： R410a：计算四种工况： 标准工况；T05C；T115 C； Tk55 C；T450 C； 最大压差工况；T05C；T115 C； Tk50C；T445 C； 最大轴功率工况；T05C；T115 C； Tk45 C；T440 C；设计工况：T07.2C；T118.3 C； Tk54.4 C；T446
2、C；二、 滚动转子示意图转子轴向长度L=D*=54*0.8=43.2mm偏心距e=R*=0.5D*=0.5*54*0.09=2.43mm转子的半径r=R-e=0.5*54-2.43=24.57mm滑片厚度b取2e，则b=2e=2*2.43=4.86mm吸气孔口前边缘角：32吸气后边缘角：22排气后边缘角：32排气前边缘角：22三、 热力计算1. 四种工况的温度表，如下T0（）T1（）Tk（）T4（）标准工况5155550最大压差工况-5155045最大轴功率工况-5154540设计工况7.218.354.446各种工况循环的p-h图：2. 热力计算，如下表：R410a标准工况最大压差工况最大轴
3、功率工况设计工况0.9320.6800.6800.9963.3963.0332.7013.351压力比3.6444.4603.9723.3640.0300.0440.0440.0290.0090.0110.0120.009435.51439.52439.52437.41473.48486.55482.75473.10292.19280.72270.02282.96等熵指数=1.16由r410a的性质经计算求得1.161.161.161.16压缩多变指数1.0741.0781.0621.036工质单位质量制冷量143.32158.80169.50154.45单位等熵压缩功37.9747.0343
4、.2335.69理论容积输气量3.043.043.043.04容积系数0.970.97 0.970.98压力系数 （通常认为近似等于1） 1 1 1 1温度系数（通常，当压力比=28时，=0.950.82，压力比高时取下限）0.900.900.900.90泄漏系数（转速为3000r/min时，约为0.820.92范围）0.880.880.880.88回流系数（一般近似取1）1111容积效率0.770.770.770.78实际质量输气量78.0353.2053.2080.72制冷量3.1062.3472.5053.463等熵压缩功率0.8230.6950.6390.800其中4.0084.906
5、4.3693.701指示效率0.770.780.780.78指示功率1.070.890.821.03机械效率（=0.400.85）0.80.80.80.8电动机效率（小冰箱0.65，商用制冷机）0.70.70.70.7电效率0.600.50 0.46 0.58电功率1.371.391.391.38性能系数（相对功率） 2.271.691.802.51四、 转子受力分析1）压缩过程中基元容积内的气体压力2）作用于滚动转子上的气体力合力3）作用于滚动转子上的阻力矩 旋转力矩 摩擦力矩五、 气体合力及阻力矩随转角的变化曲线标准工况PFgMgMfM00.932000.8572570.85725750.
6、93200.0000000000 0.8572570.857257100.93200.0000000000 0.8572570.857257150.93200.0000000000 0.8572570.857257200.93200.0000000000 0.8572570.857257250.93200.0000000000 0.8572570.857257300.93200.0000000000 0.8572570.857257350.9335711.0895260.0008647913 0.8572570.858122400.9368363.8056160.0034279911 0.85
7、72570.860685450.9409987.9025950.0079449696 0.8572570.865202500.94615813.694710.0151634763 0.8572570.87242550.95241721.514080.0259503830 0.8572570.883207600.95987631.707350.0412832347 0.8572570.89854650.96863844.632860.0622390475 0.8572570.919496700.97880860.658490.0899812165 0.8572570.947238750.9904
8、9480.160290.1257454120 0.8572570.983002801.003812103.52180.1708253160 0.8572571.028082851.018884131.13410.2265589890 0.8572571.083816901.035839163.3970.2943165699 0.8572571.151573951.054821200.72050.3754899090 0.8572571.2327471001.075985243.52770.4714846149 0.8572571.3287411051.099502292.25810.58371
9、48711 0.8572571.4409721101.125563347.37190.7136012583 0.8572571.5708581151.154379409.35580.8625716969 0.8572571.7198281201.18619478.72861.0320655177 0.8572571.8893221251.221265556.04911.2235405721 0.8572572.0807971301.259906641.92411.4384832203 0.8572572.295741351.302462737.01861.6784209768 0.857257
10、2.5356781401.349325842.06651.9449375635 0.8572572.8021941451.400948957.88322.2396901133 0.8572573.0969471501.4578491085.3812.5644282917 0.8572573.4216851551.5206271225.5842.9210151534 0.8572573.7782721601.5899721379.6513.3114496358 0.8572574.1687061651.6666881548.8923.7378907052 0.8572574.5951471701
11、.7517111734.8034.2026833226 0.8572575.059941751.8461361939.0894.7083865807 0.8572575.5656431801.9512472163.7065.2578045928 0.8572576.1150611852.0685612410.9045.8540209859 0.8572576.7112781902.1998772683.2816.5004381798 0.8572577.3576951952.3473332983.8487.2008230294 0.8572578.058082002.5134943316.11
12、27.9593608901 0.8572578.8166182052.7014423684.1698.7807207571 0.8572579.6379772102.914914092.8349.6701348744 0.85725710.527392153.1584494547.79410.6334971535 0.85725711.490752203.3964971.78811.4834377327 0.85725712.340692253.3964902.02811.1634442864 0.85725712.02072303.3964823.63510.8092497462 0.85725711.666512353.3964736.51110.4223069085 0.85725711.279562403.3964640.56910.0043555674 0.85725710.861612453.3964535.7349.5574458885 0.85725710.4147250
