Introduction of relevant knowledge of single suction pump

I. Installation and adjustment of single suction pump

The installation of the pump must be carried out by trained and experienced personnel.

Installation form:

1. Measure and record the pump position.

2. Place the generator on the foundation, insert anchor bolts into the foundation, and adjust the bolts. There is a gap of 4-5 mm between the base and the base.

3. Grout the anchor bolts to make them firm.

4. After the foundation is secure, tighten the anchor bolts evenly.

5. Adjust and grout base.

Second, single suction pump bearing lubrication

Single suction pump bearing factory has added grease, should check the bearing before starting. If impurities enter the bearing during transportation and storage, or if the grease solidifies or leaks, the grease must be replaced before starting.

Bearing grease must be replaced after two years of operation. The bearing must be removed each time the grease is replaced. Before replacing the grease, clean the bearing, bearing body and bearing cover with gasoline or similar media, and wipe it clean. Ball bearings and ball bearings are fully filled with grease, while the bearing gland is only half filled with grease. The oil gun injects oil into the oil nozzle above the bearing.

Single suction pump bearings lubricated by medium or external water source. In order to prevent the blockage of the bearing, the bearing must be cleaned every 8,000 hours or more than two years after operation, and the lubrication pipe must be unblocked.

Three, single suction pump shaft seal maintenance

If the shaft seal leaks a lot or stops for a long time, the packing should be installed or replaced before the pump starts. When the pump is running, there is a small amount of water dripping at the stuffing box. The packing is too tight, the bearing sleeve will heat and wear, so the packing must be pressed lightly and evenly.

Mechanical seal: Mechanical seal does not require special maintenance, check daily for heat. If the mechanical seal is obviously leaking, disassemble and check, and replace the mechanical seal if necessary.

Four, single suction pump decomposition

As long as the pump cover is removed, the entire rotor assembly can be removed without the need to remove the inlet and outlet water pipes;

1, close the import and export valve, open the drainage plug and exhaust plug, discharge water and gas;

2, loosen the fastener between the pump coupling and the motor coupling;

3. Loosen and press out the packing cover;

4. Loosen the connection bolt between the pump cover and the pump body, and remove the pump cover;

5. Loosen the connection bolt between the bearing body and the pump body, and remove the rotor parts;

6, remove the pump coupling and bearing cover;

7. Loosen the nut and press out the bearing body from the shaft, including the bearing, to ensure uniform pressure. Do not use a hammer, otherwise it will damage the bearing;

8. Remove packing, packing ring and bushing, loosen bushing nut and remove bushing. The blade shaft is a clearance fit, and the impeller is easy to disassemble. If you can't remove it, hit the hub with a wooden hammer.

5. Reorganization

Reassembly shall be carried out in the direction opposite to the above disassembly sequence. Standard assembly processes or installation instructions must be followed when assembling and removing seals, bearings, pump bodies and impeller seals.

To prevent the packing ring from entering the stuffing box before installing the pump cover, glue the packing ring to the packing gland.

Then close it.

If there is frost or prolonged parking, empty the pump and cooling chamber (if there is one), or take other anti-freeze measures. If pump is equipped with packing seal, remove packing. If the pump is treating sewage, drain and flush it to prevent corrosion of the sewage during parking.

Vi. Maintenance/operation management

The pump runs smoothly, otherwise the bearings and shaft seals will be damaged, and the pump is not allowed to operate in a dry state. When the outlet valve is closed for a long time, the pump cannot run. High bearing temperature shall not exceed the ambient temperature 50C or 90C.

The valve in the auxiliary line must be kept open while the pump is running. If the pump is equipped with a packing seal, there should be a small amount of water when running, and the packing gland should be lightly pressed.

Check the spare pump regularly to ensure that the pump is working properly and run the pump shaft regularly. Check coupling parts regularly and replace them as soon as wear is found. The external sealing, cooling and lubricating water must be higher than the inlet pressure.