| 系统压力(bar) |
系统流量(L/min) |
管路内径(mm) |
油液粘度(cSt) |
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点击这返回总目录 |
| 1 |
70 |
15 |
30 |
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| 压力管路内径(mm) |
回油管路内径(mm) |
吸油管路内径(mm) |
安全壁厚(mm)(20号钢) |
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| 17.24904055 |
22.2684156 |
43.12260138 |
0.007317073 |
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| 流速(m/s) |
雷诺数(Re) |
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| 6.601967386 |
3300.983693 |
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金属直管长度(m) |
软管直管长度(m) |
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1 |
1 |
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| 层流压力损失(bar) |
0.297088532 |
0.316894435 |
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| 紊流压力损失(bar) |
0.545812697 |
0.545812697 |
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| 作用在滑阀上的稳态液动力 |
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| 系统流量Q(L/min) |
100 |
阀开口度x(mm) |
2 |
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| 滑阀通径d(mm) |
10 |
压力降(bar) |
8.236972783 |
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| 射流角θ(°) |
69 |
稳态液动力(N) |
14.25905748 |
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| 薄壁小孔流量 |
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| 小孔的直径(mm) |
压力差(bar) |
流量系数 |
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| 5 |
3 |
0.62 |
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| 流量(L/min) |
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| 18.84980995 |
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| 细长孔流量 |
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| 小孔的直径(mm) |
压力差(bar) |
油液粘度(cSt) |
孔长度(mm) |
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| 20 |
0.2 |
20 |
273 |
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| 流量(L/min) |
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| 958.974359 |
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| 圆环形间隙流量 |
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| 圆柱直径(mm) |
平均间隙δ(mm) |
偏心距e(mm) |
油液粘度(cSt) |
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| 100 |
0.02 |
0 |
30 |
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| 压力差(bar) |
孔长度(mm) |
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偏心率ε |
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| 100 |
50 |
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0 |
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| 流量(L/min) |
0.093084444 |
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| 平面缝隙流量 |
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| 缝隙宽度b(mm) |
缝隙间隙(mm) |
缝隙长度(mm) |
压力差(bar) |
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| 314 |
0.02 |
50 |
100 |
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| 流量(L/min) |
0.093037037 |
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| 平行圆盘间隙流量 |
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| 缝隙间隙(mm) |
压力差(bar) |
圆盘直径(mm) |
中心孔直径(mm) |
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| 0.02 |
100 |
50 |
2 |
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| 油液粘度(cSt) |
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| 30 |
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| 流量(L/min) |
0.028918217 |
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| 理想液体伯努利方程 |
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| 实际 |
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| 液体重度 |
γ=ρ·g |
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| 雷诺数 |
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| Re=v·DH/ν |
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v - 流速 |
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DH - 水力直径 |
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ν - 运动粘度 |
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| DH =4A/χ |
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A- 通流截面面积 |
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χ- 湿周长度 |
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| 沿程压力损失 达西(Darcy)公式 |
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l- 直管长度 |
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d- 管路内径 |
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v- 平均流速 |
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ρ- 油密度 |
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λ-沿程阻力系数 |
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| 局部压力损失 |
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ξ-局部阻力系数 |
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Cd- 流量系数 |
流量系数 |
Cd |
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| 薄壁小孔流量 |
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a - 节流面积 |
薄壁小孔 l<0.5d |
0.62~0.63 |
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ρ- 油液密度 |
阻尼长孔 l=(2~4)d |
0.82 |
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| 细长孔流量 |
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| 圆环形间隙流量 |
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ε- 偏心率 |
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δ- 同心时的间隙量 |
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e - 偏心量 |
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ε=e/δ |
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| 平面缝隙流量 |
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b - 缝隙宽度 |
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| 平行圆盘间隙流量 |
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R - 圆盘的外半径 |
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r - 圆盘的中心孔半径 |
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