Stop when the pump should be work and operation questions frequently

Before the pump (fan) exit door is shut, to prevent non-return door is lax, the mother tube pressure water flow back to people L - 1 tube, reversal caused by manual hydraulic test pump. How bad water against system, inverted for water pump. Pump, blower, pause and pay attention to idle away time. If time is too short, to check for grinding pump (fan) card.

For large forced lubrication pump (such as boiler feed water pump), still need to start before stop the pump auxiliary pump, in case of burning bearing shell in the process of slow down. Pump (fan) stops, should be based on the system connected to the pump (fan) is to determine whether population valve should be closed. Shut down after the exit door should be instant switch downtime. Six, pump or fan in the starting switch should be done after work can observe pump or fan starting, at the same time, should listen to the fan or pump motor. If the buzzing sound, while the motor cannot turn a switch to stop immediately, and check is not the cause of the rotation.

Check pump (fan) should be paid attention to when stuck or manual turning tests.

Check whether the motor is normal, connection is correct. Sometimes because the motor have a break and not turning.

In the running of water pump of different sounds

Loose different sound

Loose different sound by loose on the shaft of rotor and the sound, the sound is cyclical. Such as circulating water pump impeller, shaft sleeve on the axle is loose when gap (even for 1 ~ 3 mm), will send hitched hitched sound. Such as the pump shaft bending, the collision voice would have been greater, because of the impeller and shaft sleeve on the shaft has a tendency to to droop, gap appeared in the underside of the shaft. But when bend convex to upper part, will hit the impeller upward movement, no upward movement, such as impeller pump shaft convex and transferred to the lower part, impact impeller downward movement. After the pump shaft and convex to the above, to hit the impeller upward movement, so the periodic noise. It must be pointed out that in this case the movement of the water pump is very dangerous, in addition to the pump leakage caused by swinging of rotor air outside, more serious is the pump shaft and the impeller causes crack fracture along the edges (in part), etc.

Some of the rolling bearing interval sets with no bearing pressure, there will be intermittent in running the rattle of the shaft. Because of the distance the clearance between the shaft and sleeve is bigger, when it is on when the axial and is not pressure, can cause a under axial clearance, but by accident reasons above will bring clearance, due to its quality, the relationship between distance set toward the whereabouts, issued and the rattle of axis slightly.