Preparation for multistage pump test run

Preparation for multistage centrifugal pump test:

(1) Check the maintenance records, the maintenance quality should meet the requirements of the maintenance procedures, and confirm that the maintenance records are complete and the data is correct.

(2) Check the lubrication condition, if it does not meet the requirements, replace or add lubricating oil in time.

(3) The cooling water system should be unimpeded.

(4) There is no sense of uneven weight, no noise, and the packing gland is not crooked.

(5) The hot oil pump must warm the pump before starting, and the preheating rate is not higher than 50 ° C per hour.

Load test run:

After the no-load test is completed, the performance indicators of the multistage pump meet the technical requirements, and the load test can be carried out. The load test steps are as follows:

(1) Turn the car and turn on the cooling water.

(2) Irrigation pump.

(3) Start the motor. Pay attention to the multistage pump outlet pressure, motor current and operation.

(4) Slowly open the outlet valve of the multistage pump until the normal flow rate.

(5) Adjust flow and pressure with regulating valve or pump outlet valve.

Load test should meet the following requirements:

(1) Smooth operation without noise, lubrication and cooling system works normally.

(2) The flow rate and pressure are stable, and the nameplate capacity or checking capacity is reached.

(3) Under the rated head and flow, the motor current does not exceed the rated value.

(4) Normal temperature of all parts.

(5) Bearing vibration amplitude: working speed below 1500r/min, should not be less than 0.09mm; The working speed is less than 3000r/min, and should not be less than 0.06mm.

(6) No leakage of the joint parts and auxiliary pipelines.

(7) Shaft seal leakage should not be higher than the following standards. Packing seal: general liquid, 20 drops/min; heavy oil, 10 drops/min.Mechanical seal: general liquid, 10 drops/min; Heavy oil, 5 drops/min.