活塞式压缩机设计说明

1活塞式压缩机的设计说明姓名：班级：学号：指导老师：21.题目：复算19WY-9/150型氢氦气压缩机在目前操作条件下的各级压力、排气温度、排气量、功率，作出计算示功图、切向力图、活塞力图、标明最大活塞力与切向力，核算配用电机功率是否适当？2.19WY-9/150型氢氦气压缩机简介19WY-9/150型氢氦气压缩机是我省投产3000吨小型化肥厂的氮氢气压缩机，二列之间为飞轮，由电机通过三角皮带拖动。压缩机为卧式、两列、门型、四线压缩。原料（半水煤气）经脱硫后进入I级，经I级压缩后送去变换、水洗、碳化，碳化后为碳化气。碳化气返回II级、III、IV级压缩后去洗铜、合成。3.目前操作条件与有关数据（1）操作条件：吸气压力：0.15MPa（绝）排气压力：16.0MPa（绝）I级出口与II级进口压力差为P=0.09MPa吸气温度：3级IIIIIIIVTs(℃)30354040I级进口相对湿度=1（2）气体组成组分N2H2CO2COO2ArCH4半水煤气0.210.390.120.260.0050.00450.0105碳化气0.2370.7090.0050.0290.0030.0050.012（3）有关数据：活塞行程：S=310mm，活塞杆直径d=60mm转速：n=209rpm，连杆长度l=700mm；I、IV列超前II、III列90度往复运动件重量：I—IV列210.9kg；II—III列193.7kg级IIIIIIIV直径D34021013565相对余隙0.0650.150.160.1抽气系数10.890.890.89飞轮矩GD2为471.0kgm2，配用电机额定功率：155kw。设计计算一.计算各级的行程容积。I级：32222212421S10.05439m0.31)0.060.0652(0.344π)SdDD(D4πVII级：43222322S20.01704m0.31)0.1352(0.214π)SD(2D4πVIII级：322223S30.00356m0.31)06.0(0.1354π)Sd(D4πVIV级：3224S40.00103m0.31065.04πSD4πV二计算各级名义压力和名义压力比已知16MPaP0.15MPaPd4s1s2s2s2s1s1s1TVPTVP0.4867MPa3030.017043080.054390.15VTTVPPs2s1s2s1s1s20.5767MPa0.09PPs2d1MPa3673.23030.003563130.054380.15VTTVPPPs3s1s3s1s1s3d2MPa1822.83030.001033130.054390.15VTTVPPPs4s1s4s1s1s4d33.8450.150.5767PPεs1d11864.40.48672.3673PPεs2d22456.32.36738.1822PPεs3d335955.18.182216PPεs4d44三排气温度1.绝热指数计算首先需算出各气体的绝热指数，查《活塞式压缩机》附表1常用气体物理性质得：各气体绝热指数组分绝热指数1.401.411.311.401.401.681.32注：表中所列的气体绝热指数为时的参数，但对于理想气体绝热指数的大小与温度的关系不大，顾可不考虑温度的影响，可把k看做是常数。混合气体的k值计算式为：111ikk。对于半水煤气来说有1𝑘−1=0.211.40−1+0.391.41−1+0.121.31−1+0.261.40−1+0.0051.40−1+0.00451.68−1+0.01051.32−1=2.5652k=1.3898同理对碳化气有：1𝑘−1=0.2371.40−1+0.7091.41−1+0.0051.31−1+0.0291.40−1+0.0031.40−1+0.0051.68−1+0.0121.32−1=2.4627k=1.4061所𝑘1=1.3898𝑘2=𝑘3=𝑘4=1.4061。2计算排气温度2N2H2COCO2OAr4CH50,1.01310otCPpa6由式k1ksk1ksdsdεT)PP(TT可得442.07K3.845303εTT1.389811.3898k1k1s1d111K37.864864.4308εTT1.406111.4061k1k2s2d222K81.447456.3313εTT1.406111.4061k1k3s3d333K87.379955.1313εTT1.406111.4061k1k4s4d444级次吸气温度排气温度压力比(K)Ts(K)TdI303442.073.845II308486.374.864III313447.813.456IV313379.871.955四第一次精度计算1各级容积系数①根据《过程流体机械》表2-1计算膨胀指数m得：1.19491)0.5(1.389811)0.5(k1m1.5barP11s13046.11)10.75(1.40611)0.75(k1mbar867.4P22s23574.11)10.88(1.40611)0.88(k1mbar673.23P33s371.4061km81.822barP44s4②对于理想气体，容积系数1)α(ε1λm1v0.86441)40.065(3.84-11)(α1λ1.19491111v11m0.64571)0.15(4.864-11)(α1λ1.30461122v22m0.76111)0.16(3.456-11)(α1λ1.35741133v33m0.93891)0.1(1.955-11)(α1λ1.40611144v44m2计算工况系数C和精度B由maxminsiivisis1s1siiS1v11CCBVμλTTppCVλC04701.005439.08644.0VλCs1v1103946.001704.089.06457.030830315.04867.0VμλTTppCs22v2s2s1s1s2204651.000356.089.07611.031330315.03673.2VμλTTppCs33v3s3s1s1s3305738.000103.089.09389.031330315.01822.8VμλTTppCs44v4s4s1s1s4497.069.005738.003946.0CCCCB42maxmin精度不达标进行第一次复算8五第一次复算1.计算各级进出口压力由式)CC(1p21pi1sisi计算各级压力0.15MPapps1s10.5333MPa)0.039460.047010.4867(10.5)CC(1p21p21s2s2MPa3800.2)0.046510.047012.3673(10.5)CC(1p21p31s3s3MPa4428.7)0.057380.04701(11822.80.5)CC(1p21p41s4s40.6233MPa0.09pps2d1MPa3800.2pps3d2MPa4428.7pps4d3MPa16ppd4d42计算各级压力比91497.24428.716PPε1272.32.38007.4428PPε4628.40.53332.3800PPε155.40.150.6233PPεs4d44s3d33s2d22s1d113确定膨胀系数根据《过程流体机械》表2-1计算膨胀指数m得：111s1m1.19491)0.5(1.389811)0.5(k1m1.5barP222s2m1.30461)10.75(1.40611)0.75(k1mbar333.5P333s3m1.35741)10.88(1.40611)0.88(k1mbar800.23P1.4061mbar428.74P444s4mk4计算容积系数1)εα(1λm1v0.92761)0.1(2.1497-11)ε(α1λ0.78941)20.16(3.127-11)ε(α1λ0.67791)80.15(4.462-11)ε(α1λ0.85091)50.065(4.15-11)ε(α1λ1.40611m144v41.35741m133v31.30461m122v21.19491m111v143215计算工况系数C和精度Bmaxminsiivisis1s1siis1v11CCB,VμλTTppC,VλC1004628.005439.08509.0VλCs1v1104540.001704.089.06779.030830315.05333.0VμλTTppCs22v2s2s1s1s2204850.000356.089.07894.031330315.03800.2VμλTTppCs33v3s3s1s1s3305156.000103.089.09276.031330315.04428.7VμλTTppCs44v4s4s1s1s4497.088.005156.004540.0CCCCB42maxmin精度不达标进行第二次复算六第二次复算重复第一次复算步骤，列出计算结果如下表级IIIIIIIV进气压力sip0.150.53842.32557.0617排气压力dip0.62842.32557.016716压力比i4.18934.31933.03662.2657容积系数vi0.84940.68960.79730.9211工况常数𝐶′′0.046200.046620.047860.04858精度𝐵′′0.950.97七第三次复算重复第一次复算步骤，列出计算结果如下表级IIIIIIIV进气压力𝑃𝑠𝑖′′′0.150.53832.28526.889排气压力𝑃𝑑𝑖′′′0.62832.28526.88916压力比𝜀𝑖′′′4.18874.24523.01462.322511容积系数𝑣𝑖′′′0.84950.69570.79930.9179工况常数𝐶′′′0.046200.047020.047150.04723精度𝐵′′′0.980.97八修正排气温度由式k1ksk1ksdsdT)PP(TT，可得452.81K1887.4303εTT1.389811.3898k1k1s1d111K62.4672452.4308εTT1.406111.4061k1k2s2d222K48.4300146.3313εTT1.406111.4061k1k3s3d333K24.3993225.2313εTT1.406111.4061k1k4s4d444级次吸气温度排气温度压力比(K)Ts(K)TdI303452.814.1887II308467.624.2452III313430.483.0146IV313399.242.3225九排气量计算1容积系数120.9179λ0.7993λ0.6957λ0.8495λv4v3v2v12确定压力系数对于第一级，压力系数可取为0.95~0.98，故取；对于其余各级，压力系数可取为0.98~1，故取；3确定温度系数根据各级压力