Some causes of damage to the engine bearing axle tile damage

1. Damage and damage caused by long running time

The surface alloy layer of the bearing is squeezed and shifted by the squeezing and shifting. The reason for damage is: the total speed rotation time of the engine is too long, the engine is running below the normal working temperature, the fuel sprayed into the burning room cannot be completely burned. The lubricating oil film is low lubricating effect. At the same time, the total speed rotation speed is low, and the oil pump has a small oil supply. Therefore, the slight dry friction of the shaft tile bearing surface and shaft is caused, causing the surface of the alloy layer of the bearing to be damaged. Damage and damage. To prevent such problems from occurring, the total speed of the total speed should not exceed 5 minutes after the engine starts the engine every time the engine is started.

2. The damage and damage caused by the engine after a long time of work (shutdown)

The surface of the axial tile alloy was worn, and the uneven surface alloys were shifted from the middle to both sides. The cause of damage is that after the engine work is large for a long time, the internal parts are in the highest working temperature state, especially the combustion room part is at high temperature. After the engine stops running, the cooling system and the lubrication system have stopped work. The temperature of the relevant parts increases and the oil membrane on the surface of each lubrication surface is destroyed. When the oil desert on the surface of each lubricant has not been formed, the abnormal wear of the axis tile has occurred. In particular, the sliding shaft damage of the supercharger is more serious. At the same time, excessive temperatures will cause deformation of the axishole, destroying the operating accuracy to accelerate the damage of the engine. The occurrence of this phenomenon can cause serious damage to the piston, the cylinder and the cylinder sealing ring. Therefore, after a long period of load work, the engine must allow the engine to run at low speed at low speed at low speeds for more than 10 minutes, and the internal temperature is reduced.

3. After the engine is started, directly enter the high -speed operation and full load operation to damage or damage the axis tile

The seventh and sixth main axis tiles of the engine are severely worn, and other axis tiles are damaged. The cause of damage is that after the engine starts, the heating and operating without air load is not carried out. Because when the engine does not meet the working temperature requirements, the force contact surface and operation of each ministry have not entered the best state, and the lubricating oil with low temperature is poor. Can cause damage or damage to the axis. The lower the outside temperature, the more severe the damage to the bearing tile. To prevent the occurrence of such problems in accordance with the regulations, the temperature will operate at low speed after the engine is started. When the engine water temperature rises above 70 °C, it can be put into operation.

4. Due to adjustment and operation errors caused by bearing tile damage or damage

The crankshaft stop push bearing (upper push ring) is severely worn or damaged, and the seventh main axis tile damage. The cause of damage is that the axial gap of the crankshaft is too large or too small, which will cause damage to the crankshaft toxic bearing. During the use process, a large -scale gap caused a large impact. The increase in small temperature in the axial gap will cause abnormal wear and cause damage to the seventh main axle tile. To prevent such problems from occurring, the axial gap of the crankshaft must be ensured during the installation of the engine.

5. Incorrect installation causes shaft tile damage or damage

Individual axis tiles are severely worn on the single side, and the surface of the tile alloy is worn.

The cause of damage is that the variable volume of the link exceeds the standard allowable range; the solid torque of the shaft tile lid bolts is uneven; the single side of the axis tile is bruised during installation;

6.Seven axis tiles have severe wear, and the middle axis tiles are more severe than the axis tile at both ends

The reason is: the bearing tilehole is deformation; the crankshaft is curved (the cause of the crankshaft bending is: uneven operating gaps, severe wear of related parts or damaged vibration, balance shock absorber failure. The failure of balance shock absorbers can also cause crankshaft breaks to break the axis break ); The positioning part of the positioning of the bearing is not right or reflected: the upper and lower tiles are misplaced in the oil hole.

7.The back of the bearing tile is corroded or tracelessly moved

The reason is that in order to correct the operation of the operation during installation, the two side planes of the bearing tile are cut, destroying the elasticity of the axis tile and the shaft hole; When the bolt is fastened, there is no fastener in accordance with the prescribed method and torque. The tight tightening torque on the bolt of the torque is too large or too small, and the bolt of the bolt of the same tile can cause damage to the bearing.