1. Inspection before starting of vertical multistage centrifugal pump

Whether the name, model, specification, characteristics and total filling amount of lubricating oil meet the requirements of technical documents;

Whether the air inlet system, sealing system software and refrigeration system of rolling bearing are intact, and whether the oil passage and water passage of rolling bearing are smooth;

Turn the motor rotor of the pump for 1-2 turns to check whether the motor rotor has friction or stuck screen;

Is there any dirt on the side of the coupling or the safety device of the drive belt that hinders the rotation;

Whether the basic foundation screws of pumps, bearings with seats and motors are loose or not;

During the operation of the pump, the gate valve of the system software or the attached weapon equipment should be located at the position where the load of the pump is small, and the inlet and outlet regulating valves should be closed;

Start the multi-stage pump to see if the centrifugal impeller turns into the same as the design scheme. If not, make sure that the centrifugal impeller stops rotating, and then adjust the motor wiring before running the stainless steel plate centrifugal pump again.

2. Vertical multistage centrifugal pump for water injection

Before the operation of vertical multi-stage centrifugal pump, the pump body and the moisture absorption pipe must be filled with water, which comes from the fact that the suction inlet vacuum pump of vertical multi-stage centrifugal pump can not produce and maintain under the condition of gas

3. Vertical multistage centrifugal pump

Pumps transporting high temperature liquid, such as centrifugal air compressors in power plants, must be warmed before running vertical multistage centrifugal pumps. This is because when the centrifugal pump is started, the high-temperature feed water flows through the pump, which makes the temperature of the pump shell rise rapidly from normal temperature to 100 ~ 200 ℃, which will promote the temperature difference between the left and right sides of the pump and the components. If there is not enough long heat transfer time and appropriate operation measures to increase the temperature, the uneven rise of each part of the pump will cause the deformation, damage and damage of each initial component of the pump shell Vibration and rolling bearing shaft holding accidents.