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1、WORD文檔下載可編輯起重吊裝鋼絲繩的選用一鋼絲繩類型及選用:表1-8序號(hào)鋼絲繩類型一般適宜選用的場(chǎng)合16×19+1鋼絲繩用作纜風(fēng)繩、拉索,即用于鋼繩不受彎曲或可能遭受磨損的地方26×37+1鋼絲繩用于滑車組中,即繩子承受彎曲時(shí)采用,作為穿繞滑車組起重繩等36×61+1鋼絲繩用于滑車組和制作千斤繩(吊索)以及綁扎吊起構(gòu)件(重物)二鋼絲繩的受力及安全系數(shù)鋼絲繩的受力計(jì)算表1-9鋼絲繩的容許拉力,可由下式求得:T=c×P/K(N)式中:P——產(chǎn)品規(guī)格所保證或試驗(yàn)所得的鋼絲繩破斷拉力(N),如P采用鋼絲破斷拉力總和,則須乘“換算系數(shù)
2、”;K——鋼絲繩的安全系數(shù),可按表1-10采用c—鋼絲繩的換算系數(shù)鋼絲繩的安全系數(shù)K表1-10使用情況K值使用情況K值用于纜風(fēng)繩3.5用作千斤繩,無(wú)彎曲時(shí)6~7用于手動(dòng)起重設(shè)備4.5用作綁扎的千斤繩8~10用于機(jī)動(dòng)起重設(shè)備5~6用于載人的提升機(jī)14換算系數(shù)c按鋼絲繩規(guī)格而定:表1-11鋼絲繩規(guī)格6×19+16×37+16×61+1換算系數(shù)c0.850.820.80鋼絲繩的鋼絲強(qiáng)度,按國(guó)家標(biāo)準(zhǔn)(GB1102-74)規(guī)定分為五級(jí),即1400、1550、1700、1850和2000(MPa)。對(duì)鋼絲繩在不同公稱抗拉強(qiáng)度時(shí)的容許拉力,
3、可按下表?yè)Q算求得:強(qiáng)度換算系數(shù)1400→1550MPa1400→1700a1400→1850MPa1400→2000MPa1.1071.2151.3211.429以上算例系按新繩為準(zhǔn),如所用為舊鋼絲繩,則求得的容許拉力應(yīng)根據(jù)繩的新舊程度,乘以0.4~0.75的系數(shù)。附表:附表1鋼絲繩容許拉力查用表表1-12附表2鋼絲繩主要技術(shù)規(guī)格表1-13專業(yè)資料整理分享WORD文檔下載可編輯附表:1鋼絲繩容許拉力查用表表1-126×19+1鋼絲繩容許拉力直徑(mm)鋼絲總斷面積(mm2)參考質(zhì)量(kg/100m)鋼絲繩公稱抗拉強(qiáng)度為1400
4、MPa時(shí)破斷拉力(kN)安全系數(shù)K在下列數(shù)值時(shí)的容許拉力(kN)鋼絲繩鋼絲鋼絲破斷拉力總和整根繩的破斷拉力K=3.5K=5K=8K=106.27.79.311.012.514.015.517.018.520.021.523.024.526.028.031.034.037.040.043.046.00.40.50.60.70.80.91.01.11.21.31.41.51.61.71.82.02.22.42.62.83.014.3222.3732.2243.8557.2772.4989.49108.28128.87151.241
5、75.40201.35229.09258.63289.95357.96433.13515.46604.95701.60805.4113.5321.1430.4541.4454.1268.5084.57102.3121.8142.9165.8190.3216.5244.4274.0338.3409.3487.1571.7653.0761.120.031.345.161.380.1101.0125.0151.5180.0211.5245.5281.5320.5362.0405.5501.0606.0721.5846.5982.01
6、125.017.026.638.352.168.185.8106.3128.8153.0179.8208.6239.3272.4307.7344.7425.9515.1613.3719.5834.7956.34.97.610.914.919.524.530.436.843.751.459.668.477.887.998.5121.7147.2175.2205.6238.5273.23.45.37.710.413.617.221.325.830.636.041.747.954.561.568.985.2103.0122.7143
7、.9166.9191.32.13.34.86.58.510.713.316.119.122.526.129.934.138.543.153.264.476.789.9104.3119.51.72.73.85.26.88.610.712.915.318.020.923.927.230.834.542.651.561.372.083.595.6專業(yè)資料整理分享WORD文檔下載可編輯續(xù)上表6×37+1鋼絲繩容許拉力直徑(mm)鋼絲總斷面積(mm2)參考質(zhì)量(kg/100m)鋼絲繩公稱抗拉強(qiáng)度為1400MPa時(shí)破斷拉力(kN)安全系數(shù)
8、K在下列數(shù)值時(shí)的容許拉力(kN)鋼絲繩鋼絲鋼絲破斷拉力總和整根繩的破斷拉力K=3.5K=5K=8K=108.711.013.015.017.519.521.524.026.028.030.032.534.536.539.043.047.552.056.060.565.00.4