Screw pump installation technical requirements and common faults

Abstract: Screw pump is a new type of industrial water pump for liquid transportation. It has the advantages of simple structure, safe and reliable work, convenient use and maintenance, continuous and uniform liquid discharge and stable pressure. How should the screw pump be installed? What are the phenomena of poor pumping and how should it be handled?




The screw pump is a new type of industrial pump for conveying liquid. It has the advantages of simple structure, safe and reliable work, convenient use and maintenance, continuous and uniform discharge, and stable pressure. How should the screw pump be installed? What are the phenomena of poor pumping and how should it be handled?
First, the screw pump installation preparation
Screw pump installation preparation content:
(1) Check the screw pump motor and make sure that there is no damage during transportation and handling.
(2) Check the tools and lifting machinery and check the basis of the machine.
Second, screw pump installation requirements
The installation of the screw pump shall comply with the following installation requirements in addition to the instructions in the instructions:
1. The pump should not be started without liquid or the outlet valve is fully closed. The pump should be filled with liquid before starting.
2. When the temperature of the conveying liquid is higher than 60 °C, it should be preheated according to the provisions of the technical documents of the equipment;
3, test run fashion should check whether the safety valve is sensitive and reliable.
Third, the common failure of the screw pump (how to deal with the various phenomena of poor pumping of the screw pump)
1. The screw pump vibrates violently: the electric rotor may be unbalanced, or the coupling may be poorly coupled, the bearing may be worn and bent; or some parts may be loosened or broken; perhaps because the pipe bracket is not strong. It can be handled by adjustment, repair, reinforcement, replacement, etc.
2. Screw pump packing overheating: mostly because the packing is pressed too tightly, the cooling water does not enter the packing, or the shaft surface is damaged. Measures such as appropriate loosening of the packing and cleaning of the closed tube can be taken. Packing wear must be replaced with new ones. Soak in the oil before installation, install in a circle, and the slits should be staggered to reduce oil leakage. After the last lap of packing is installed, the gland should be tightly installed and the tightness should be adjusted during operation.
3. The screw pump line leaks or leaks: the nut may not be tightened when it is installed. If the leakage is not serious, apply cement or cement slurry mixed with asphalt oil in the place where the air leaks or leaks. Temporary repairs can be applied to wet mud or soft soap. If oil leaks at the joint, you can tighten the nut by hand. Serious oil spills must be disassembled.

4. The screw pump does not absorb oil or discharge oil: the reason is mostly that the bottom valve is stuck, the oil filter is partially blocked, the oil suction height is too high or the oil suction leaks, and the steering passage may be blocked due to improper steering. After checking one by one, measures such as repairing the bottom valve, removing the fouling material, correcting the steering, and cleaning the impeller can be taken separately.

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