Maintenance of Screw Conveyor

1. Check operating status of screw conveyor components regular when in use, pay attention to fasteners. If any looseness of fasteners, tight screw at once.

2. When beginning feeding by screw conveyor, should increase the feeding speed gradually to reach the rated capacity. Feeding smooth, otherwise there may be blocking in transporting materials and overload of drive device which may cause premature damage of machine.

3. To ensure requirement of non-load start, no feeding before stopping screw conveyor, and it will stop after materials in casing are completely transported.

4. No large size materials to avoid the blocking and damage of screw conveyor.

5. Pay special attention to the screw between connection shaft. If any looseness, falling down or breakage, stop the machine at once and correct it.

6. Don’t remove the cover of screw conveyor when operating to avoid accidents.

7. Add lubricating oil regular for components of screw conveyor.

(1) Reducer should be added HQ-10 lubricating oil, and change oil 3-6 month once.

(2) Bearing boxes on both ends of conveyor should use 5g lithium base lubricating grease  half a month once.

(3) Hanging bearing should use lubricating grease every 3-5 month once.

8. Check every abnormal phenomenon of screw conveyor and solve the problems. 

Troubleshooting of Screw Conveyor

1. Connecting bolt broken easily

As for the screw conveyor made up of couple sections, the connecting bolt located in the head section bearing the full motor torque, while the rear screw segments and the connecting bolt bearing the decreasing torque. Therefore, the connecting bolt located in the head section broken easily.

Solution: Using the high-strength bolt in the head section, if necessary, you can also adopt three bolt connect, so that insure the screw conveyor can normal operation and avoid the connecting bolt become shorten

2. Suspension bearing wear easily

There are many factors can affect the suspension bearing wear, such as working environment, working conditions, the characteristic of conveying material, suspension bearing structure, quality etc. Especially when operation the suspension buried in the material, if sealed and lubricated is not good enough then the material particle will easily fall into the connecting surface of bush and journal, which will make wear faster.

Solution: choose the wear-resistance bush and assurance the quality; besides you also should keep good seal and lubricated to extend the work life of the suspension bearing.

3. Suspension bearing installed improper makes the screw locked or bending

Solution: Suspension bearing should be mounted concentric with the connecting shaft and insure that all suspension bearings concentricity to insure that wire helix of each segment.

There should leave some place between end and the screw shaft end usually is 10-20mm; Each suspension bearing halves should be connected firmly, tight, and it should be keep proper radial clearance to ensure screw flexible rotation.

4. Too many materials piled up in the inlet

Too many materials piled up in the inlet actually mean that the screw conveyor emerge blockage trouble. For strong bagging feature, humidity, large bulk material, especially under the case that can’t feed uniformly, this trouble is easily to happen.

Solution: You are not allowed to feeding materials that can’t meet the conveying request; feeding should be uniform; In order to avoid trough distortion you are not allowed to beat the charging port.

Daily Maintenance for Screw Conveyor

Screw conveyor is bulk material handling equipment, which usually consists of a tube containing either a spiral blade coiled around a shaft (sometimes called an auger), driven at one end and held at the other, it is widely used in chemical, metallurgy, paper making, and construction industries, etc. Below you will see its daily maintenance methods:

1. When operate the screw conveyor, bearings, gears and transmission chain should be added lubricating oil regularly.
2. After machine stops, the spiral blade wear condition should be checked, if wears seriously, please repair welding.

3. The conveying capacity can not be overloaded, or the material can’t be discharged which will cause the screw axis bends and box damages.
4.During the operation of screw conveyor, any shrill noise, please open the cover and check, eliminate the noise timely.
Hope above mentioned maintenance will be helpful!