鋼絲繩的規(guī)格參數(shù)表

1、一、鋼絲繩的參數(shù)一般起重作業(yè)可采用GB/T8918-1996鋼絲繩中6×19和6×37鋼絲繩,其規(guī)格參數(shù)見表 1和表2。    表1   鋼絲繩的破斷拉力直徑鋼絲繩的抗拉強(qiáng)度/MPa 鋼絲繩 /mm鋼絲/mm14001550170018502000鋼絲破斷拉力總和/kN 6.20.420.0022.1024.3026.4028.60 7.70.531.3034.6038.0041.3044.70 9.30.645.1049.6054.7059.6064.40

2、0;11.O0.761.3067.9074.5081.1087.70 12.50.880.1088.7097.30105.50114.50 14.O0.9101.00112.00123.00134.00114.50 15.51.O125.00138.50152.00165.50178.50 17.O1.1151.50167.50184.00200.00216.50 18.51.2180.00199.50219.00238.00257.50 20.O1.321150234.00257.00279.50302.00 21.51.

3、4245.50271.50298.00324.00350.50 23.O1.5281.50312.00342.00372.00402.50 24.51.6320.50355.00389.00423.50458.00 26.O1.7362.00400.50439.50478.00517.00 28.O1.8405.50499.00492.50536.00579.50 31.O2.O501.00554.50608.50662.00715.50 34.O2.2606.00671.00736.00801.0037.O2.4721.50798.

4、50876.00 953.50 40.O2.6846.50937.501025.001115.00表 2      鋼絲繩的破斷拉力 直 徑鋼絲繩的抗拉強(qiáng)度/MPa鋼絲繩/mm鋼絲/mm14001550170018502000鋼絲破斷拉力總和/kN8.70.439.0043.2047.3051.5055.7011.O0.560.0067.5074.0080.6087.1013.O0.687.8097.20106.50116.00125.0015.O0.7119.50132.00145.00157.5017

5、0.5017.50.8156.00172.50189.50206.00223.0019.50.9197.50218.50239.50261.00282.0021.51.O243.50270.00296.00322.00348.5024.O1.1295.00326.50358.00390.00421.5026.O1.2351.00388.50426.50464.00501.5028.O1.3412.00456.50500.50544.50589.0030.O1.4478.00529.00580.50631.50683.0032.51.5548.50607.50666.50725.00784.00

6、34.51.6624.50691.50758.00825.00892.0036.51.7705.00780.50856.00931.501005.0039.O1.8790.00875.00959.501040.001125.0043.O2.O975.501080.001185.001285.001390.0047.52.21180.001305.001430.001560.0052.O2.41405.001555.001705.001855.0056.O2.61645.001825.002000.002175.00二、鋼絲繩的標(biāo)記目前在起重機(jī)上所采用的鋼絲繩主要是普通型結(jié)構(gòu)鋼絲繩,繩6

7、5;19和繩6×37。按照國(guó)家標(biāo)準(zhǔn)圓股鋼絲繩(GB1102一74)的規(guī)定,鋼絲繩的標(biāo)記方法如下:                                         &

8、#160;                           如,鋼絲繩6×37-15.0-170-I一甲一鍍一右交GB1102-74    這表示該圓股鋼絲繩由6股捻制,股的結(jié)構(gòu)形式為點(diǎn)接觸,每股有37根鋼絲,纖維繩芯, 鋼絲繩直徑15.Omm,由公稱抗拉強(qiáng)度1700MPa的I號(hào)甲組鍍缽鋼絲制成,鋼絲繩的

9、捻向?yàn)橛医换ツ怼Ｈ?、鋼絲繩的受力計(jì)算    某一規(guī)格的鋼絲繩允許承受的最大拉力是有一定限度的,超過這個(gè)限度,鋼絲繩就會(huì)被破壞或拉斷,因此在工作中需對(duì)鋼絲繩的受力進(jìn)行計(jì)算。    (一) 鋼絲繩的破斷控力    鋼絲繩的破斷拉力可由表1、2中查出,考慮鋼絲繩捻制使每根鋼絲受力不均勻,整根鋼絲繩的破斷拉力應(yīng)按下式計(jì)算:  SP =Si    式中SP 鋼絲繩的破斷拉力,kN;  Si 鋼絲絲繩規(guī)格表中提供的鋼絲破斷拉力的總和, kN; &#

10、160; 鋼絲捻制不均折減系數(shù),對(duì)6×19繩,=0.85;對(duì)6×37繩,=0.82;對(duì)6×61 繩, =0.80。       但在工作現(xiàn)場(chǎng),一般缺少圖表資料,同時(shí)也不要求精確計(jì)算,此時(shí)可采用下式(僅為數(shù)據(jù)估算用,非規(guī)范公式)估算鋼絲繩的破斷拉力:       式中SP 鋼絲繩的破斷拉力,N;             d鋼絲繩的

11、直徑 ,mm。    (二)鋼絲繩的安全系數(shù)    為了保證起重作業(yè)的安全,鋼絲繩許用拉力只是其破斷拉力的幾分之一。破斷拉力與許用拉力之比為安全系數(shù)。下表列出了不同用途鋼絲繩的安全系數(shù)。                              &#

12、160;                           表為    鋼絲繩的安全系數(shù)使用情況安全系數(shù)使用情況安全系數(shù)用做纜風(fēng)繩、拖拉繩3.5機(jī)械驅(qū)動(dòng)起重設(shè)備5-6人力驅(qū)動(dòng)起重設(shè)備4.5用做吊索(無彎曲)6-7用做捆綁吊索810用做載人升降機(jī)14    (三)鋼絲繩的許用扭力     P = SP / K      式中  P鋼絲繩的許用拉力,N;    SP鋼絲繩的破斷拉力,N;    K  鋼絲繩的安全系