Hot oil pump maintenance should pay attention to matters

If there is a condition for the inspection of the hot oil pump, it is best to read the manufacturer's maintenance manual and the general assembly drawing first to see what special places need attention.

I. When disintegrating:

1. Use a dial indicator to measure the balance plate clearance before disassembling the thrust bearing and make a record;

2. When disassembling the hot oil pump, all parts must be marked according to the original assembly order so as to avoid confusion and mistakes during reassembly.

3. Small parts (such as keys) that are not convenient for marking can be placed together with the impeller or guide vane (middle section) of the same level.

4. When you disassemble, you can intuitively feel if there are abnormal parts, such as with loose.

Two. Parts maintenance:

1. Visually check whether the surface of each part is normal, and each mating surface must be free of bumps, scratches, or rust;

2. Dosage has measured whether the key matching parts tolerances are qualified;

3. The amount of clearance between the impeller seal ring, the housing seal ring, the guide vane seal ring, the interstage sleeve, etc. is within the tolerance range, and if the wear is too great, it needs to be replaced;

4. Check the bearing is in good condition;

5. All seals and seals are best replaced;

Three. Reload:

1. Install the rotor first and perform the dynamic balance test again;

2. Reinstall the parts in the reverse order of dismantling the pump. When reloading, pay attention to the clearance value at each seal ring again to ensure that it is correct;

3. The total rotor volume should be measured before installing the balance plate;

4. After installing the balance disk, measure the rotor half-string amount.

5. The total and semi-string quantities required on the general assembly drawing of the manufacturer shall be basically in accordance with the requirements of the drawings. In general, the half-string size is about half of the total string size.

6. Evenly tighten the main bolts and pay attention to the angle;

7. Suction a dial indicator on the shaft, the rotating shaft to play the balance plate, tolerances according to the requirements of the drawings, generally shall not exceed 0.06;

8. When installing a thrust bearing, attention should be paid to adjusting the clearance of the balance plate. The adjustment ring of the bearing should be used to adjust the balance plate clearance to the drawing requirements.