液压传动和气压传动,哪种比较好?为何现在普遍使用液压传动呢?

2025-03-10 16:30:54
推荐回答(4个)
回答(1):

1、液压比气动压力高,动力大,负载重的必须用液压。
2、液压比气动精度高,气缸一般就伸出、缩回两个动作,液压的动作可多样话,加了比例阀或伺服阀后,可以实现动作的加速度和减速度动作。油缸加了位移传感器后还可进行位移反馈,和输出的数据做比较,完成闭环控制系统。
3、动作过程中有停顿的。 要求油缸在中间位置有停顿的必须用油缸。气缸也能停顿但位置偏差过大。

回答(2):

液压与气动传动都是普遍应用于自动化中,液压传动力矩很大,气动传动灵敏但压力有限。它们都是流体传动,但介质不一样本质的区别。

回答(3):

比较项目
气压传动
液压传动
负载变化对传动的影响
影响较大
影响较小
润滑方式
需设润滑装置
介质为液压油,可直接用于润滑,不需要设润滑装置
速度反应
速度反应较快
速度反应较慢
系统构造
结构简单,制造方便
结构复杂,制造相对较难
信号传递
信号传递较易,且易实现中距离控制
液压传递信号较难,常用于短距离控制。
环境要求
可用于易燃、易爆、冲击场合,不受温度污染的影响,存在泄漏现象,但不污染环境
对温度污染敏感,存在泄漏现象,且污染环境,易燃
产生的总推力
具有中等推力
能产生大推力
节能、寿命和价格
所用介质是空气,其寿命长,价格低
所用介质是液压油,寿命相对短,价格较贵
维护
维护简单
压维护复杂,排除故障困难
噪声
噪声大
噪声较小

回答(4):

气压传动体积大.压力小.噪音大.

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