3.3.2操作推力
3.3.2操作推力
阀门电动装置的主机结构,一种是不配置推力盘 的.此时直接输出力矩:一种是配置有推力盘的,此时输出力矩通过推力盘中的阀杆螺母母转换为输出推 力。输出力矩换算成输出推力时引人了阀杆系数的概念。输出力矩与输出推力之比称为阀杆系数。阀杆螺母的梯形螺纹确定后,阀杆系数按下式计算:
表8-34 | •英制规纹的螺距与阀杆系数 | (290梯形螺纹纹) | |||||||||
闲杆直径 | 牙数 | 螺距/mm | 阀杆系数/m | 阀杆直径 | 牙数 | 螺距/mm | 阀杆系数An | ||||
/mm | /in | 艰头 | 双头 | 单头 | 双头 | /mm | /in | 单义 | 双头 | 单头 | 双头 |
10 | 8 | 3.2 | t 4 | 0. 00M | 0.0020 | 55 | 3 | 8.5 | 16.9 | 0.0067 | 0.0081 |
12 | 8 | 3.2 | t 4 | 0.0016 | 0.0022 | 58 | 3 | 8.5 | 16. 9 | 0.0070 | 0. 0085 |
14 | 6 | 4.2 | 8.5 | 0.0020 | 0. 0027 | 60 | 3 | 8.5 | 16.9 | 0.0072 | 0. 0027 |
16 | 6 | 4.2 | 8. 5 | 0-0022 | 0.0029 | 62 | 3 | 8.5 | 20-9 | 0.0074 | 0.0089 |
IS | 6 | 4.2 | 8. 5 | 0. 0024 | 0.0031 | 65 | 2 | 10.2 | 20.3 | 0.0079 | 0.0097 |
20 | 6 | 4.2 | 8.5 | 0.0026 | 0-00 32 | 68 | 2 | 10-2 | 20.3 | 0.0082 | 0.0100 |
22 | 5 | 5. I | 10.2 | 0.00 26 | 0.0038 | 70 | 2 | 10.2 | 20.3 | 0.0084 | 0.0102 |
24 | 5 | 5. 1 | 10.2 | 0.0031 1 | 0.0040 | 72 | 2 | 10.2 | 20.3 | 0. 008 | 0.0104 |
26 | 5 | 5. 1 | 10.2 | 0.0033 | 0 0042 | 75 | 2 | 10.2 | 20.3 | 0.0089 | 0.0107 |
28 | 5 | 5. 1 | 10.2 | 0.0035 | 0-0044 | 78 | 2 | 10-2 | 20.3 | 0.0092 | 0.0110 |
化 | 4 | 5. 4 | 12.7 | 0.00 巧 | 0.0050 | 80 | 2 | 10.2 | 20.3 | 0-0095 | 0.0112 |
32 | 4 | 6.4 | 12.7 | 0.0041 | 0.0052 | 82 | 2 | 10.2 | 20.3 | 0.0097 | 0.004 |
34 | 4 | 6.4 | 12.7 | 0.0043 | 0-0054 | 85 | 2 | 12. 7 | 25.4 | 0.0103 | 0.0125 |
36 | 4 | 6-4 | 12.7 | 0. 0045 | 0-0056 | 88 | 2 | 12.7 | 25.4 | 0.0106 | 0.0120 |
38 | 3 | 7. 3 | 14. 5 | 0-0048 | 0-0060 | 90 | 2 | 12.7 | 25.4 | 0.0108 | 0.0130 |
40 | 3 | 7.3 | 14. 5 | 0.0050 | 0.0062 | 92 | 2 | 12.7 | 25.4 | 0.0] 10 | 0.0182 |
42 | 7.3 | 14.5 | 0-0052 | 0-0064 | 巧 | 2 | 12.7 | 25.4 | 0-0113 | 0.0135 | |
44 | 3 | 7.3 | 14.5 | 0.0054 | 0.0065 | 98 | 2 | 12.7 | 25-4 | 0.0116 | 0.0138 |
46 | 3 | 8.5 | 16.9 | 0.0058 | 0.0072 | 100 | 2 | 12.7 | 25.4 | 0.0118 | 0.0140 |
48 | 3 | 8.5 | 16.9 | 0-0060 | 0.0074 | 105 | 2 | 12.7 | 25.4 | 0.0124 | 0.0145 |
50 | 3 | 8.5 | 16.9 | 0.0062 | 0.0076 | 110 | 2 | 12.7 | 25.4 | 0.0129 | 0-0150 |
52 | 3 | 8.5 | 16.9 | 0.0064 | 0.0075 | 120 | 1 | 14.5 | 29.0 | 0. 001 | 0.0化5 |