Liquid ring vacuum pump maintenance:
1. Check the operation and lubrication of the bearing frequently.
2. The normal working bearing is 15 ℃ – 20 ℃ higher than the surrounding temperature, and the maximum temperature is not allowed to exceed 55 ℃ – 60 ℃: the normal working bearing shall be filled with oil 3-4 times a year. Clean the bearing at least once a year and replace the lubricating oil traction part.
3. If the packing is sealed, the packing shall be pressed regularly. If the packing cannot guarantee the required sealing performance due to wear, the new packing shall be replaced. The packing must not be pressed too tight. The normally compacted packing allows water to drip out to ensure cooling and enhance sealing.
If the mechanical seal is used and leakage occurs, check whether the dynamic and static rings of the mechanical seal are damaged or the seal rings are aged. If the above situations occur, replace the new parts.
Disassembly and assembly
Disassemble:
The disassembly of the pump is divided into partial disassembly and inspection, complete disassembly, repair and replacement of parts. Before disassembly, the water in the pump chamber shall be drained, and the air inlet and exhaust shall be removed. During disassembly, all pads shall be carefully removed. In case of damage, new pads of the same thickness shall be abstracted during assembly. The pump shall be disassembled from the rear end (one end without coupling) in the following order:
1. Loosen and remove the two connecting pipes (- 1.5/3 without connecting pipe);
2. Loosen and remove the rear bearing gland;
3. Loosen the round nut with hook plate hand and remove the packing gland;
4. Loosen the gland nut and remove the gland:
5. Loosen the connecting bolts of the pump body and the end cover and the accumulated bolts at the pump feet;
6. Add a support under the pump body, and then remove the lower end cover from the shaft;
7. Remove the pump body. The pump part has been disassembled so far. At this time, the working part of the pump and each inlet part can be inspected and cleaned. Complete disassembly shall be carried out in the following order:
8. Loosen the other pump foot bolt and remove the pump head from the base;
9. Remove the coupling
10 remove the key of the coupling from the shaft
11. Remove the front bearing gland;
12. Loosen the back-up cap of the bearing and take down the bearing frame and bearing;
13. Loosen the compression nut of the packing gland and remove the packing gland;
14. Take out the shaft and blade from the end cover together;
15. Remove the shaft sleeve from the shaft;
16. Take the impeller from the shaft. After disassembly, the fitting surface and thread shall be wiped and coated with oil carefully.
Assembly:
① Before assembly, clean the gasket left on the mating surface and wipe it carefully:
② Remove the old oil in the bearing and bearing frame and replace with new oil:
③ The assembly sequence is the reverse of the disassembly sequence. During assembly, the most important thing is to adjust the clearance between the impeller end face and the disk on the end cover, which directly affects the performance of the pump. The total clearance on both sides is specified in the table below, which is obtained by adding a pad between the pump body and the end cover. The clearance on both ends of the impeller should be uniform, and the adjustment can be made by loosening the shaft sleeve or back cover to move the impeller. The price of liquid ring vacuum pump is measured by the quality of assembly equipment.
Liquid ring vacuum pump of equipment description
The liquid ring vacuum pump and compressor system is composed of vacuum pump press, coupling motor, air-water separator and bamboo road.
The working process of vacuum pump, vacuum compressor and gas water separator is as follows: the gas enters the vacuum pump or compressor through the valve through the pipeline, then discharges into the gas water separator through the air guide pipe, and discharges through the air water separator exhaust pipe. When used as a compressor, the gas water mixture discharged by the vacuum compressor is in the water separator. The gas is delivered to the system to be pressurized through Langmen, while the water is left in the gas-water separator. In order to maintain a certain water level of the gas water separator, an automatic overflow switch is installed. When the water level is higher than the required water level, the overflow switch is turned on. When the water level is lower than the required water level, the overflow switch is turned off, and the water level in the gas water separator rises to the required water level. The working water in the vacuum pump or vacuum compressor is supplied by the gas water separator (tap water is also available) The size of the water supply plate directly affects the performance of the vacuum pump, so the difference between the valve on the water supply pipe and the pressure delivery system is only that the internal structure of the gas-water separator is not concerned. When pumping gas, the pressure at the suction port is lower than the atmospheric pressure, while the pressure at the exhaust port is equal to the atmospheric pressure, and there is only overflow pipe in the gas water separator: when pressing gas, the suction port is under the atmospheric pressure (or vacuum state), and the pressure at the exhaust port is under the atmospheric pressure. In order to ensure the delivery gas pressure, the water level of the gas water separator is controlled by the overflow switch.
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