食品包装机上的旋片真空泵如何防止反油？_Industry News

食品包装机上的旋片真空泵如何防止反油？

Article source：Industry News
Website editor：莱诺真空泵
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Publication time：2020-02-21 16:14:03

旋片式真空泵的原理和防止泵停止时回油的措施。如果停止泵，则与泵腔连通的油孔或排气阀，轴封，泵盖平面，进气管，气镇阀等未密封。当泵腔处于真空状态时，由于液位差的存在以及重力的影响以及油箱与泵腔之间的压力差，油会返回泵腔。当机油量足够大时，机油也会返回进气管，导致下次启动时阻力很大，转子和转子受力，排气门受力，启动困难，零件的寿命受到影响，泵的可靠性降低。

因此，应尽一切努力防止泵停止时回油。原理是在停止泵时切断油路，消除泵腔中的负压，减小液位差，并减少回油量。常见的具体措施是：

1.将排气阀附近的机油与其余机油分开，并且机油油位仅略高于分隔壁

2.将燃油箱和排气阀移至一侧以降低油位并减少油量

3.阀座的平面应平整，阀盘应具有弹性

4.轴封和静密封应可靠并及时更换

5.在油孔中加一条管，使油位仅略高于进油口

6.止回阀机构设置为在泵停止时自动关闭进油口

7.设置油泵和辅助机构，在停止泵时切断油路

8.泵端口装有一个充气阀

9.填充入口容器

Article source：https://www.leynow.com.cn/news/400.html

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