Maintenance and repair Of The Vertical Turbine Generators Pump

1 Running diary and Management file

(1) running diary

Record the operation of the pump as a basis for formulating the pump operation plan.

Running diary should include at least the detection time, open (stop) machine time, pressure gauge readings, current, voltage, frequency, speed, vibration, noise, environment temperature, bearing temperature, seal leakage, entrance pressure (vacuum) data.

(2) management archives;

Management records should be the pump and the prime mover of the factory time, manufacturers, the main performance parameters, maintenance records.

2 maintenance

  The correct maintenance operation is of great significance to the pump in the best state of operation, fully play its role, improve the service life of the pump, and avoid accidents. Frequent inspection and maintenance is one of the most important methods to avoid over use and take preventive measures.

(1) routine maintenance inspection items:

A.Shut off the pressure gauge cock when the A. pump is stopped;

B.check cooling water, sealing water, water supply system, piping circuit and pump for leakage;

C. check all kinds of meters;

D. periodically measure the vibration value of pump set, and pay attention to the noise;

E. keep the unit clean;

F. make running records.

(2) monthly inspection items;

A. check and adjust the pump and motor to ensure concentricity;

B. check lubricating oil, cooling water and sealing water;

C. measuring vibration and noise of pump unit;

D. on the long time of the pump (such as standby pump), starting a running time, not less than 5 minutes; conditions for the restricted case of the manual turning.

(3) annual inspection items;

A. inspect the worn parts of the rotating parts;

B. check the clearance between the impeller and the sealing ring;

C. check the impeller, guide vanes, guide vanes and other parts of the flow channel of cavitation and erosion;

D. inspect the wear of bearings and bushings.

3  Repair

Pump should be disassembled and repaired when necessary (vibration or noise abnormal, bearing temperature is too high, flow head obviously decreased, etc.). For continuous running pumps, a regular overhaul shall be carried out every year.

(1) the maintenance experience shall be recorded in detail during the maintenance work for reference during the next maintenance;

(2) spare parts are prepared in advance. When purchasing spare parts, the name, material and quantity of the spare parts shall be clearly stated, and the pump type, name, date of manufacture and serial number of the factory shall be clearly stated;

(3) the demolition by the reverse assembly sequence, after the demolition of the parts of the rust removing and re coating;

(4) check the clearance between the impeller and the sealing ring. The replacement criteria are shown in the following table (reference):

(5) check the clearance between the guide bearing and the axle sleeve. The replacement criteria are shown in the following table (reference):

(6) check the wearing of the axle sleeve, and change the diameter direction from 1 to 2mm in case of wear;

(7) inspect the wear of the impeller, guide vanes and other parts;

(8) replacement of seals (O ring, rubber pad, etc.);

(9) assemble according to assembly sequence. After the rotation of the pump rotor assembly, should be balanced.