In the overhaul process, the diagnosis of water ring vacuum pump fault is a key link, the following is my plant Hu workers given several common faults and solutions for everyone to carry out water ring vacuum pump fault diagnosis, I wish We will soon solve the thorny issue. 1, the water ring vacuum pump no liquid supply, lack of supply of liquid or lack of pressure: â‘´ no water or no exhaust; solution: check the vacuum pump housing and inlet pipe are all filled with liquid. ⑵ speed is too low; Solution: Check the motor wiring is correct, the voltage is normal or the turbine's steam pressure is normal. ⑶ system head too high; solution: check the system head (especially the friction loss). â‘· suction too high; solution: Check the existing net head (inlet pipe is too small or too long will cause a great friction loss). ⑸ impeller or pipeline blocked; solution: check for any obstructions. ⑹ rotation direction is wrong; Solution: check the direction of rotation. ⑺ Air or inlet line leaks; Solution: Check inlet piping for cavitation and / or air leaks. â‘» stuffing box packing or seal wear, the air leak into the vacuum pump housing; Solution: Check the packing or seal and replace as needed to check the lubrication is normal. ⑼ pumping hot or volatile liquid suction head inadequate; Solution: Increase the inhalation of the head, consult the manufacturers. ⑽ bottom valve is too small; solution: install the correct size of the bottom valve. ⑾ bottom valve or inlet pipe immersion depth is not enough; Solution: Consult factory for the correct immersion depth. Eliminate eddies with baffles. â‘¿ impeller clearance is too large; Solution: check the gap is correct. â’€ impeller damage; Solution: Check the impeller, as required replacement. â’ Impeller diameter is too small; Solution: Consult factory for correct impeller diameter. â’‚ pressure gauge position is not correct; Solution: Check the location is correct, check the outlet nozzle or pipe. 2, the water ring vacuum pump will stop for a while running: â‘´ suction is too high; solution: Check the existing net head (inlet pipe is too small or too long will cause a great friction loss). ⑵ impeller or pipeline blocked; solution: check for any obstructions. ⑶ produce air or inlet pipeline leakage; Solution: check the inlet pipeline for air and / or air leaks. â‘· stuffing box packing or seal wear, so that air leakage into the vacuum pump shell; Solution: Check the packing or sealed and replaced as needed. Check the lubrication is normal. ⑸ pumping hot or volatile liquid suction head inadequate; solution: increase inhalation of the head, consult the manufacturers. ⑹ bottom valve or inlet pipe immersion depth is not enough; Solution: Consult manufacturers for the correct immersion depth, with a baffle to eliminate eddy currents. ⑺ vacuum pump shell gasket damage; solution: check the gasket and the situation to be replaced. 3, water ring vacuum pump power consumption is too large: â‘´ rotation direction wrong solution: check the direction of rotation. ⑵ impeller damage solution: check the impeller, as required to be replaced. ⑶ rotating parts killed Solution: Check the internal wear parts of the gap is normal. â‘· axis bending solution: Alignment axis or on request to be replaced. ⑸ too high speed solution: check the motor winding voltage or steam pressure delivered to the turbine. ⑹ head below the rated value. Too much liquid pumping Solution: Consult factory. Install throttle valve, cut impeller. ⑺ liquid heavier than expected solution: check the proportion and viscosity. â‘» The stuffing box does not have the correct stuffing (insufficient stuffing, incorrect stuffing or running in, stuffing too tight) Solution: Check the stuffing and refill stuffing box. ⑼ Bearing lubrication is not correct or bearing wear Solution: Check and replace as required.ä¸ The running clearance between wear rings is not correct Solution: Check the clearance is correct. Replace the wear ring of the vacuum pump housing and / or impeller as required. ⑾ vacuum pump casing pipe stress is too large Solution: eliminate stress and manufacturers representatives advice. After eliminating the stress, check the alignment. 4, water ring vacuum pump stuffing box leak too much â‘´ axis bending solution: straightening axis or on request to be replaced. ⑵ coupling or vacuum pump and drive misalignment Solution: check the alignment, if necessary, re-center. ⑶ bearing lubrication is not correct or bearing wear solution: check and replace as required. 5, water ring vacuum pump bearing temperature is too high â‘´ axis bending solution: straightening axis or according to the requirements of the replacement. ⑵ coupling or vacuum pump and drive misalignment Solution: Check the alignment, if necessary, re-center. ⑶ bearing lubrication is not correct or bearing wear solution: check and replace as required. â‘· vacuum pump casing pipe stress is too large Solution: eliminate stress and advice to the manufacturer. After eliminating the stress, check the alignment. ⑸ Too much lubricant solution: Remove the plug, so that too much oil is automatically discharged. If it is an oil-lubricated vacuum pump, drain the oil to the correct oil level. 6, water ring vacuum pump stuffing box overheating â‘´ stuffing box stuffing or seal wear, air leakage into the vacuum pump shell Solution: Check the packing or seal and replace as needed. Check the lubrication is normal. ⑵ stuffing box is not properly filled (insufficient packing, not properly inserted or run together, the packing is too tight) Solution: Check the packing, packing stuffing. ⑶ packing or mechanical seal design problems Solution: consult the manufacturer. â‘· mechanical seal damage solution: check and replace as required. Consult the manufacturer. ⑸ sleeve scratches solution: repair, re-machining or replacement as required. ⑹ too tight packing or mechanical seal is not properly adjusted Solution: Check and adjust the packing, according to the requirements of the replacement or adjustment of mechanical seal (reference manual or telephone consultation to our factory). 7, water ring vacuum pump rotating parts have difficulty turning or friction â‘´ axis bending solution: straightening axis or according to the requirements of the replacement. ⑵ Wear ring between the running gap is not correct Solution: Check the gap is correct. Replace the wear ring of the vacuum pump housing or impeller as required. ⑶ vacuum pump casing pipe stress is too large Solution: eliminate the stress and consultation on behalf of manufacturers. After eliminating the stress, check the alignment. â‘· shaft or impeller ring swing too much solution: check the rotating parts and bearings, replace worn or damaged parts as required. ⑸ impeller and vacuum pump housing wear rings between the dirt, vacuum pump housing wear rings in the dirt solution: cleaning and inspection wear ring, according to the requirements of replacement. Cut off and eliminate the source of dirt. The above water ring vacuum pump fault diagnosis and repair skills.
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