Daily Operation and Maintenance of Gyratory Screen

Daily Operation and Maintenance of Gyratory Screen

Gyratory screen (similar with Rotex screener) is a high precision standard of fine screening machine, which is mainly composed of screen box, driving device, screen frame, support and vibration damping device, gyratory screen structure is compact, it is mainly used in screening operation like chemical, food processing, refractory materials, building materials industries. Here PK Machinery will make a brief introduction of gyratory screen daily operation and maintenance:

 

1. check if all the components are normal, whether the fasteners are loose or not, especially the vibration motor; 

2. in the process of operation, please stop the machine at once and inspect if any abnormal sound is found , don not put into operation unless eliminate the failure; 

3. it is an initial stage that motor running accumulated within 100 hours, during this period, please fasten the foundation bolt regularly; 

4. you can shut down the gyratory screen after confirming the material inside the screen is empty ,so as to avoid material blockage;

5. check the screen and clear the screen mesh regularly, check tension condition of screen mesh and see if there is degree; 

6. after about 200 hours of operation, please lubricate the vibration motor bearing, add lubricating oil inside the bearings, the grade is 1# calcium base grease.

Troubleshooting for Gyratory Screen

As one of our main product, gyratory screen has been supplied to many plants all over the world and also enjoys a good reputation because of its superior design and quality. Gyratory screen is widely applicable to chemical, food processing, refractory materials, building materials, activated carbon, food, PVC powder and other fine materials.
However, during the operation, we may meet some problems, here PK Machinery will introduce the breakdown reason and method in detail.

Breakdown	Reason	Solution
V-belt heating up	V-belt looseness Through of belt is broken or the surface is rough	Loose the bolt which fastens the motor, adjust the distance between motor and belt pulley Check and repair the belt pulley
Bearing heating up	The grease is excessive or shortage or the quality is bad Bearing is broken Main shaft bends or the inertial force is not balanced The bearing cup is not compatible with other parts Belt is too tight Overload working for a long time	Change the grease Change bearing Correct the main shaft Change the part which coordinate with the bearing Adjust the tightness of the V-belt Reduce the feeding rate
There is no force for motor	Two phase electricity Circle short for the winding Overload working for a long time	Power on the lost phase electricity to ensure it runs under 3 phases Inspect the motor Keep the screen working under the rated load
Fail to start the motor	Low voltage Electrical wiring is too thin Fuse is broken	Start the screen once electricity is normal Change the electrical wiring Change a proper fuse
Violent or wiggly vibration	The rotation shaft bends Bearing is broken	Replace or correct the shaft Replace the bearing
The unqualified size material mixed in the finished material	Screen mesh is broken Screen cover or seal bar is loose	Renew the screen mesh Press the cover and seal bar
Capacity declining	The moisture is too high, block the mesh The opening size is not suitable Rotation speed is low or the V-belt is loose Feeding rate is low The rubber ball is worn out	Reduce the moisture of material Renew the screen mesh Check the belt pulley and the tightness of belt Increase the feeding rate Renew the feeding rate

What should We Note during the Operation of Gyratory Screen

Gyratory screen is similar to rotex screener, it is designed with gyratory motion which can obvious improves the distribution of the material. Applicable material includes urea, potash, fertilizer, activated carbon, pellet, ceramic powder, sugar, salt, starch and fireproofing material etc. Here PK Machinery will introduce necessary notes before starting up the screen.

1. Check the fastened part, safe protection device and lubrication before start-up.
2. Test run without load first for about 3-5mins to see if the rotation direction meets the requirement.
3. Feeding material with normal operation once non-load test run is normal,
4. Check the material discharging condition during running, if any blockage is found, please solve it timely.
5. Check the material distribution on screen mesh is uniform or not, if necessary, stop machine and adjust.
6. If there is abnormal noise or vibration that you have to stop the gyratory screen, please stop machine at once, only when the trouble is eliminated, then you can start up.
7. If gyratory screen is operated in a production line together with other equipment, please start up downstream equipment, then start up the upstream equipment.