一, pump bearing cooling effect is poor. Thin oil lubrication bearing is a type of slurry pump thin oil lubrication, cooling oil through built-in surface cooler cooling again. Cooler material is pure copper tube, cooling medium is water. Poor cooling effect there are two reasons: 1, the cooling wall surface fouling, poor heat transfer; 2,small or without cooling water, cooling water, so often should check bearing cooling water pressure and flow rate. General slurry pump cooling water pressure of 0.05-0.2 mPa, after cooling water flow rate of 1-3 m/h, the change in time scale of the cooler, open cooling water before the pump start-up adjust pressure to the specified value, regularly check the bearing temperature (35 ℃), the highest temperature shall not be greater than 75 ℃.
二, the slurry oil or water into the pool. Slurry pump in use process due to packing wear of seal failure, grout along the shaft seal leak, slurry pump shell after moment full of bracket and connection of semicircle positioning hole curved surface, not from the feeding mouth discharge by infiltration water retaining plate in seal oil slurry pool or cooler welded joint not good welding, water into the oil pool, oil pollution bracket oil pool, bearing damage.
Routine maintenance should be paid attention to in the regular check, shaft seal water leaking in when the leak amount increase, should be adjusted packing gland bolts, timely replacement of packing and failure O ring, prevent leak slurry from the infiltration of water retaining plate bracket oil pool, replace or welding joint cooler again.
三, the lubricating oil is not clean, oil oil too much or too little. Lubrication on the fatigue life of rolling bearing, friction and wear, temperature rise, vibration and so on have important influence. Through lubrication bearing parts, can reduce the friction and wear and tear, but due to the lubricating oil mixed with dirt and oil aging metamorphism, bearing heating degree than the original increase during operation, general slurry pump continuous operation should be completely replace lubricating oil after 800 h, working oil model for L - AN32 (winter) or L - AH46 (summer). Bracket oil pool when filling oil cannot be too much or too little and too much oil to leak out along the pump shaft outward, lubricating oil at the same time not taking too much bearing inner frictional heat, most of the less than effective heat dissipation effect, bearing temperature rise caused by increased; Come on too little, can cause bearing oil film rupture and dry friction, bearing burn out. Should be in strict accordance with the instruction manual adjustment of oil pump, regularly check the oil level within the bracket is appropriate, the correct oil level is near the oil level line shall not exceed + 2 ㎜, if there is an oil seal failure or leakage phenomenon, should be timely supplement of oil.
四, the slurry pump impeller leaves simple way blocked. There are foreign bodies blocked slurry pump impeller leaves simple will cause the impeller out of balance, increased to one side of the thrust, and causes the damage of bearing vibration pump. Appear afore-mentioned problems should be clear in time the impeller blade passage for the plugs.
五, pump seat anchor bolt is loose. Pump block anchor bolt looseness in the vibration of the pump, bearing damage caused by the radial force, should be regularly check the pump in the tighten situation, on the basis of anchor bolt connection should be solid and reliable. |