Created on:2021-06-03 10:14

Trouble shooting of screw pump

Trouble shooting of screw pump

Generally speaking, as long as the correct installation, use and maintenance of screw pump, the pump can work normally.

The common faults of screw pump include no self-priming, flow decline, flow instability, excessive noise, abnormal heating and pump jam. The following table is the screw pump in the use of some common fault phenomena and troubleshooting.

Some common faults and troubleshooting of screw pump

Fault phenomenon

原因分析

排除方法

泵不能自吸

⑴原动机与泵的旋转方向不一致

⑴纠正原动机旋转方向

⑵泵未充液或吸入管路漏气

⑵充液或检查管道各连接处,并予以密封、紧固

⑶泵吸入管路端面漏气

⑶检查并予以密封

⑷螺杆与外套磨损,间隙变大致使内泄露增大

⑷对泵大修,更换螺杆和外套

流量下降或流量不稳

⑴同1.(3)

⑴同1.(3)

⑵吸油高度超标;管路阻力大

⑵降低吸油高度;加大管路直径、缩短管长、更换通流能力大的过滤器

⑶同1.(4)

⑶同1.(4)

⑷转速太低

⑷按铭牌要求或产品样本指定额定转速选用原动机转速

⑸安全阀故障

⑸检查原因并排除

⑹液体中有气体

⑹排除

⑺介质品种与黏度选择不正确

⑺更换与选择推荐的介质品种及黏度

噪声过大

⑴同1.(3)

⑴同1.(3)

⑵同2.(2)

⑵同2.(2)

⑶轴承损坏;泵轴与原动机轴不同心

⑶更换轴承;重新装配

⑷同2.(7)

⑷同2.(7)

原动机过热

⑴功率过小

⑴检查或更换

泵卡阻

⑴同1.(2)

⑴同1.(2)

⑵吸入管能有焊渣进入

⑵清除

⑶螺杆平衡圆与轴承体摩擦

⑶修轴承体

⑷高温介质失去润滑性

⑷换新

⑸吸油高度超标,泵空转干摩擦

⑸改正吸油高度

⑹同2.(7)

⑹同2.(7)

 

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