液压系统中液压泵的额定压力位6.3mpa，输出流量为40l⼀min，怎么确定油管规格
推荐回答（5个）
管路规格确实很重要，和压力关系不大，压力决定管路壁厚。
1.吸油管路流速。<1m/s.
那么吸油管子的规格d>4.63根号流量/流速
这里d——mm，流量L/min；流速m/s
计算结果，吸油管路直径d>29mm。那么你要往标准上靠。吸油路为32通径，管子外径为42，管子接头M48X2，当然也可以用法兰连接。
2.压力管路。3-6m/s
那么同样根据计算公式，可得出压力管子直径在12~16，往标准靠。压力管路为15通径，管子外径22，管子接头M27X2。
3.回油管路.1~3m/s
同样根据公式计算，回油管路在17~29mm，往标准上靠的话，可以选20通径或者25通径，如果安装空间允许当然选大的好，25通径的管子外径为34，接头螺纹M42X2
如果选20通径的话，管子外径28，螺纹M33X2
以上说的都是国标，你也可以往美标等上靠，基本上差不多。
注意，硬管一般都是用外径来衡量尺寸，软管一般用内径即通径尺寸来衡量。
管路规格确实很重要，和压力关系不大，压力决定管路壁厚。
1.吸油管路流速。<1m/s.
那么吸油管子的规格d>4.63根号流量/流速
这里d——mm，流量L/min；流速m/s
计算结果，吸油管路直径d>29mm。那么你要往标准上靠。吸油路为32通径，管子外径为42，管子接头M48X2，当然也可以用法兰连接。
2.压力管路。3-6m/s
那么同样根据计算公式，可得出压力管子直径在12~16，往标准靠。压力管路为15通径，管子外径22，管子接头M27X2。
3.回油管路.1~3m/s
同样根据公式计算，回油管路在17~29mm，往标准上靠的话，可以选20通径或者25通径，如果安装空间允许当然选大的好，25通径的管子外径为34，接头螺纹M42X2
如果选20通径的话，管子外径28，螺纹M33X2
以上说的都是国标，你也可以往美标等上靠，基本上差不多。
注意，硬管一般都是用外径来衡量尺寸，软管一般用内径即通径尺寸来衡量。
回答者： sdc8451 - 助理 二级 2009-7-3 10:50
暂成这位朋友的答案。
按公式：16.7*流量（单位是L/min）/管路流通面积（mm的平方），算出来是流速M/min,然后，根据吸油还是排油管路，对比是否满足流速要求，不满足，可以加大管径，再重新计算，知道满足为止
如果管路不长，较直；就用3分的管就可以了，也可以用4分管也可以，一成钢丝就行
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