The cause of the abnormal sound of the main bearing pad of Perkins diesel engine.
1. Overview. Perkins diesel engines, as a reliable engine type, are widely used in a variety of equipment and vehicles. However, sometimes the main bearing pads may have problems with squeak and rattle, which may affect the proper operation of the engine. This article will help users better understand and solve this problem by the causes of the abnormal sound of the main bearing pad of Perkins diesel engine.
Second, the cause of the abnormal sound of the main bearing pad.
1.Improper bearing clearance.
Too little or too much clearance between the main bearing pads can cause squeaks and rattles. If the clearance is too small, it will lead to the difficulty of bearing operation, the friction will increase, and the abnormal sound will be produced; If the clearance is too large, the bearing will shake during operation and collide with adjacent parts to produce abnormal noise.
2.Bearing surface damage.
Bearing surface damage such as scratches, spalling, corrosion and other phenomena will cause abnormal noise during the operation of the bearing. These injuries can be caused by poor lubrication, foreign body intrusion, or overload.
3.Crankshaft journal wear.
The wear of the crankshaft journal can also affect the operation of the main bearing pad, causing abnormal noise. Wear and tear of crankshaft journals can be caused by long-term use or poor lubrication, among other reasons.
4.Assembly issues.
Improper assembly of the main bearing pads can also lead to abnormal noises. For example, the incorrect bearing mounting position, insufficient or uneven tightening torque of the bearing cover bolts, etc., may cause the bearing to shake or shift, and then produce abnormal noise.
3. How to solve the problem of abnormal noise of the main bearing pad.
1.Check the bearing clearance.
First, check that the clearance between the main bearing pads is appropriate. If the clearance is too small, it can be adjusted by grinding the bearing jacket; If the clearance is too large, a suitable bearing needs to be replaced. At the same time, make sure that the bearings are installed in the correct position to avoid shaking or displacement during operation.
2.Repair bearing surface damage.
For the damage to the bearing surface, it can be repaired or replaced with a new bearing, depending on the degree of damage. The repair process includes steps such as grinding the damaged surface and filling the repair agent; If the damage is severe or irreparable, a new bearing will need to be replaced. At the same time, lubrication and protective measures should be strengthened to prevent the recurrence of similar injuries.
3.Repair of crankshaft journal wear.
If the crankshaft journal is badly worn, it needs to be repaired or replaced. The repair process can be done by grinding the journal, chrome plating or sprayingIf it cannot be repaired or the performance after repair does not meet the requirements, a new crankshaft should be replaced. After the crankshaft is repaired or replaced, it needs to be reassembled and adjusted.
4.Check the quality of the assembly.
Check the assembly quality of the main bearing pad to ensure that the bearing is installed in the correct position and the bolt tightening torque is appropriate and uniform. During the assembly process, relevant process requirements and operating procedures should be followed to ensure assembly quality and safety. At the same time, strengthen quality inspection and process control, and find and solve problems in the assembly process in a timely manner.