Introduction to the relevant knowledge of single suction pumps
Release time:
2023-02-02
Source:
Introduction to Single Suction Pump Related Knowledge 1. Installation and Adjustment of Single Suction Pump The installation of the pump must be carried out by trained and experienced personnel.
Introduction to single suction pump related knowledge
1. 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 position of the pump.
2. Place the motor unit on the foundation, insert the anchor bolts into the foundation and adjust. Leave a gap of 4-5 mm between the base and the base.
3. Grout the anchor bolts to secure them.
4. After the foundation is secure, evenly tighten the anchor bolts.
5. Adjust and grout the base.
2. Lubrication of single suction pump bearings
The bearings of the single suction pump have been filled with grease at the factory, and should be checked before starting. If impurities enter the bearings during transportation and storage, or if the grease has solidified or leaked, it must be replaced before starting.
The grease must be replaced after two years of bearing operation. Each time grease is replaced, the bearing must be disassembled. Before replacing grease, clean the bearing, bearing body, and bearing cover with gasoline or similar medium, and wipe clean. The ball bearings should be completely filled with grease, while the bearing cover should only be half filled with grease. Use a grease gun to inject oil into the oil nozzle at the top of the bearing.
The sliding bearings of single suction pumps are lubricated by medium or external water sources. To prevent bearing blockage, bearings must be cleaned every 8000 hours or every two years after operation, and lubrication pipelines must be unobstructed.
3. Maintenance of single suction pump shaft seals
If there is a large leakage from the shaft seal or it has been stopped for a long time, packing should be installed or replaced before starting the pump. When the pump is running, there should be a small amount of dripping from the packing box. If the packing is pressed too tightly, it will cause heating and wear on the bearing sleeve, so it must be pressed lightly and evenly.
Mechanical seal: Mechanical seals do not require special maintenance; check daily for overheating. If there is obvious leakage from the mechanical seal, disassemble for inspection and replace if necessary.
4. Disassembly of single suction pump
The entire rotor assembly can be disassembled by removing the pump cover without needing to disassemble the inlet and outlet pipelines;
1. Close inlet and outlet valves, open drainage plug and air vent to drain water and gas;
2. Loosen fasteners between pump coupling and motor coupling;
3. Loosen and press out packing cover;
4. Loosen connection bolts between pump cover and pump body, then remove pump cover;
5. Loosen connection bolts between bearing body and pump body, then remove rotor component;
6. Remove pump coupling and bearing cover;
7. Loosen nuts to press out bearing body from shaft including bearings to ensure even pressure. Do not use a hammer as it may damage the bearings;
8. Remove packing, packing ring, and bushing; loosen bushing nut and remove bushing. The impeller shaft has a clearance fit making it easy to remove; if it cannot be removed, tap on the hub with a wooden hammer.
5. Reassembly
Reassembly should be done in reverse order of disassembly. When assembling and disassembling oil seals, bearings, pump bodies, and impeller sealing rings, standard assembly procedures or installation instructions must be followed.
To prevent packing rings from entering the packing chamber before installing the pump cover, stick packing rings onto packing covers.
后再关闭。
If frost occurs or if parked for a long time, drain water from pumps and cooling chambers (if any), or take other antifreeze measures. If pumps are equipped with packing seals, remove packing. If pumps are handling sewage, drain water and flush to prevent corrosion during parking.
6. Maintenance/Operation Management
Pumps should operate smoothly; otherwise they may damage bearings and shaft seals; pumps are not allowed to run in a dry state. If outlet valves are closed for an extended period, pumps cannot operate. High bearing temperatures must not exceed ambient temperature by more than 50C or reach above 90C.
When pumps are running, valves in auxiliary pipelines must remain open. If pumps are equipped with packing seals, there should be a small amount of dripping during operation; packing covers should be lightly pressed.
Regularly check standby pumps to ensure they operate normally; regularly run pump shafts. Regularly inspect coupling components; once wear is found, replace immediately. External seals, cooling water, and lubrication water must have higher pressure than inlet pressure.
Single suction pump
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