The gap between the cylinder liner and the piston is approximately 0.2mm.
After the piston ring is installed in the cylinder body, the opening clearance is generally around 0.2 mm (opening clearance varies between engines). Piston rings are usually marked (except oil rings). they have words. One side faces up. If there are no characters but chamfered corners, the inside chamfers are up and the outside chamfers are down. If a rectangular ring does not have characters or chamfered corners, it can be ignored. The trapezoidal ring has no characters, it must be based on the shape of the piston ring groove.
The inner surface of the cylinder liner is directly affected by high temperature and high pressure gases, and always has high-speed sliding friction with the piston ring and piston skirt. The surface is in contactact with the cooling water, causing strong thermal stresses in the event of large temperature differences and being corroded by the cooling water. The lateral thrust of the piston on the cylinder liner not only intensifies the friction on its inner surface, but also causes its bending. When the side thrust changes direction, the piston also hits the cylinder liner. In addition, it is also subject to significant pre-tightening force during installation.
Detailed information:
1. Check the standard cylinder liner and piston size grouping codes. The cylinder liner and piston must be installed so that the size grouping code of the standard piston is the same as the size. standard cylinder liner grouping code. This is the only way a game of adjustmentsStandard ment can be assured. For multi-cylinder diesel engines, each cylinder must be equipped with a cylinder liner and a piston with the same group code.
2. Be careful to check the cylinder cap clearance before installation. Sometimes the cylinder liner and piston size group codes are the same. In order to guarantee the assembly standard, a test must be carried out. before installation to avoid counterfeit and poor quality products. For high-speed multi-cylinder diesel engines, it is also important to note that the weight difference of each cylinder piston group should be within the specified range.
3. Check cylinder cap clearance. If the repair shop has the required conditions, use a cylinder gauge to measure the inner diameter of the cylinder liner (including roundness and cylindricity errors) and use the outer diameterr to measure the size of the piston skirt. Calculate the difference between the two. If there is no condition, you can use a long workpiece thickness gauge to measure.
Baidu Encyclopedia - Piston
Baidu Encyclopedia - Cylinder Liner
There are many reasons why gasoline generators stall often automatically during operation. The reasons are: firstly, there is no oil, secondly, the oil circuit is blocked, thirdly, the body temperature is too high, and fourthly, the load is too great. These situations will cause the gasoline generator to automatically stall during operation.
If the machine is not very old or old, it is recommended to replace the spark plug and carburetor. If it is certain that the spark plug is not the fault, it is recommended that the oil supply line is not smooth andwhether it is cleaned or replaced.
Detailed information:
How to store gasoline generators when not in use used for a long period of time:
1. Drain all gasoline in the fuel tank and carburetor;
2. Drain all the oil in the crankcase
3. Engine oil reachesThe upper limit of the oil level of the dipstick;
4. Close the choke and pull the starter handle to where resistance is felt;
5. Wipe the device and use the lid. with carton or plastic cover to prevent dust.