Common Fault Causes and Elimination Methods for Open Mixing Mills

Fault Phenomena

Treatment Methods

1. Shear pin dimensions or quality do not meet requirements.

1. Manufacture shear pins according to specified requirements.

2. Overloading or processing material that is too hard.

2. Load material appropriately.

3. Incorrect roll gap adjustment.

3. Operate according to standard procedures.

Fault Phenomena

Treatment Methods

1. Poor lubrication.

1. Improve lubrication conditions.

2. Inadequate roller cooling.

2. Enhance cooling.

3. Bearing damage.

3. Repair or replace bearings.

4. Improper assembly.

4. Reassemble correctly.

Fault Phenomena

Treatment Methods

1. Poor gear tooth surface contact.

1. Repair the gear tooth surfaces.

2. Bearing damage.

2. Replace bearings.

3. Loose fit between gears and shafts.

3. Repair or replace components.

Fault Phenomena

Treatment Methods

1. Bearing damage.

1. Replace bearings.

2. Incorrect bearing clearance.

2. Adjust clearance.

3. Poor lubrication.

3. Improve lubrication.

4. Misalignment of input/output coupling shafts exceeding tolerance.

4. Repair alignment.

Fault Phenomena

Treatment Methods

1. Rough gear tooth surfaces.

1. Perform running-in.

2. Severe gear wear.

2. Replace gears.

3. Insufficient lubrication.

3. Improve lubrication conditions.

Fault Phenomena

Treatment Methods

1. Loose foundation bolts or crossbeam bolts.

1. Tighten all bolts.

2. Excessive clearance between the roller bearing housing and the machine frame slideway.

2. Repair to restore proper clearance requirements.