Daily maintenance of negative pressure fan

　　Daily maintenance of negative pressure fan

　　Clean up the impurity of protective net; Check the looseness of the belt. If any looseness is found, adjust and reset the belt. Motor bearing is abnormal sound, if there is a check motor lubrication is there! Regarding motor maintenance and maintenance, we can proceed from the following aspects:

　　1. Disconnect the power supply of the host and check whether the ground wire is well grounded; Check whether the screws and couplings of each part are fastened, check the insulation resistance of the motor according to the specification, and check the contact points of the main loop. If the contact is seriously ablated or severely worn, the contact should be changed. For the maintenance of the wind valve, can be considered from the following aspects: adjust the tightness of the belt, with hand rotating wind wheel, observe whether the rotation is smooth.

　　2. Check and replace the gasket and seal packing between the joints. Clean motor wind wheel, filter and housing. In order to avoid rust, the paint should be replaced in time. For the flexibility and stability of the coupling and bearing, lubricating oil should be added to the rotating part. For the maintenance of the electrical circuit, the following 6 points should be noted: whether the mechanical opening and closing action of the regulating valve is flexible, whether the opening and closing Angle sign is clearly visible. Indicator light and voltmeter, ammeter are normal.

　　Each part of the fan is running without sound, and the three-phase current value is balanced. Check whether the components in the control box of each remote control point are all normal. Carry out continuous open and shut down operation, check whether the remote control of each point is correct. Test run 2 hours, observe whether the motor bearing temperature, the temperature in the normal range, we will go to always check the water pump power supply wire, see if there are some case such as aging or broken skin. If it is broken skin can use the parcel wrapped in shore, if is in the water, we need to replace the power cord in a timely manner. Secondary we need often go to check whether there is mud and water pump impeller, foreign bodies, such as block or water impeller outlet check when the pump running sounds good, if there is a crisp sound, water pump bearing damage, need to repair, come on. Check the pump for leakage of electricity when running. If electricity leakage, please send to the maintenance department for maintenance.