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行业知识 |
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| 常用单位转换表 |
| 度量单位 |
单位转换 |
使用范例 |
| 长度 |
1 in. = 25.4 mm
|
12 in. x 25.4 =
304.8 mm |
1 in. = .0254 m
|
120 in. x .0254 = 3.05 m |
1 ft. = .3048 m
|
12 ft. x .3048 = 3.68
m |
1 mm = .03937 in.
|
100 mm x .03937 = 3.94 in. |
1 m = 39.37 in.
|
10 m x 39.37 = 393.7 in. |
1 m = 3.281 ft
|
10 m x 3.281 = 32.81 ft. |
| 重量
|
1 lb. = .454 kg
|
10 lbs. x .454 = 4.54 kg |
| 1 kg = 2.205 lbs. |
10 kg x 2.205 = 22.05 lbs. |
压力
|
1 psi = .069 bar
|
20,000 psi x .069 = 1,380 bar |
1 bar = 14.5 psi
|
1,000 bar x 14.5 = 14,500 psi |
流量
|
1 gpm = 3.785 lpm
|
30 gpm x 3.785 = 113.55 lpm |
1 lpm = .264 gpm
|
100 lpm x .264 = 26.4 gpm |
压强
|
1 lb. (f) = 4.44 N
|
100 lbs.(f) x 4.44 = 444 N |
1 N = .2248 lbs.(f)
|
900 N x .2248 = 202.32 lbs.(f) |
功率
|
1 hp = .7457 kw
|
50 hp x .7457 = 37.29 kw |
1 kw = 1.341 hp
|
50 kw x 1.341 = 67.05 hp |
| 空气流量 |
1 cfm = .47195 l/s
|
10 cfm x .47195 = 4.72 l/s |
| 1 l/s = 2.1189 cfm |
10 l/s x 2.1189 = 21.2 cfm |
| 注： gpm: 加仑/分钟
hp: 马力
lpm: 升/分钟 kw: 千瓦 |
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| 快速压力参照表 |
| 英制 |
米制 |
米制(约数) |
40,000 psi
|
2,760 bar |
2,800 bar |
36,000 psi
|
2,484 bar |
2,500 bar |
| 30,000 psi |
2,070 bar |
2,070 bar |
20,000 psi
|
1,380 bar |
1,400 bar |
15,000 psi
|
1,035 bar |
1,050 bar |
13,000 psi
|
897 bar |
900 bar |
| 10,000 psi |
690 bar |
700 bar |
5,000 psi
|
345 bar |
350 bar |
| 3,000 psi |
207 bar |
230 bar |
| 1,000 psi |
69 bar |
70 bar |
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| 常用计算公式 |
| 水压功率计算 |
英制
|
功率(马力hp) = (gpm×psi) / 1715 |
米制
|
功率(千瓦kw) = (lpm×bar) / 600 |
| 后坐力计算 |
| 后坐力(磅lb) = 0.052 ×流量(gpm) × 压力的开方(√ psi) |
| 后坐力(牛顿N) = 0.2357×流量(lpm) × 压力的开方(√ bar) |
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| 减压表(50英尺软管) |
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