Views:92 Author:Site Editor Publish Time: 2021-06-05 Origin:Site
All of us will hope to use the 4 stroke 6 cylinder diesel generator sets as long as possible. However, the diesel generator set currently used in China is still a certain distance away from the normal international average life of more than 8000h. One of the main faults is the early wear of the diesel engine cylinder liner.
Therefore, if you want to extend the service life of diesel engines, you must know these six tips.
The failure of the air filtration system will cause the wear of the cylinder liner and greatly reduce the life of the cylinder liner. Therefore, there are higher requirements for air filtration, and multi-level and efficient air filters should be selected.
Always check and clean the dust of each part to ensure that it is clean inside and out, and replace damaged parts in time to avoid abrasive particles entering the cylinder liner. Ensure the tightness of the connection between the filter and the suction hose, and ensure that there is no air leakage from the outlet of the turbocharger compressor to the cylinder head.
The corrosion and wear of the cylinder liner depends largely on the operating temperature of the powerful 12 cylinder diesel engine set. Tests have shown that when the coolant temperature drops to 40-50°C, the wear of the cylinder liner will be 5-6 times the normal wear, so keeping the cooling system operating temperature does not exceed 90°C will greatly limit the sulfur-containing vapor condense on the wall of the cylinder liner, thereby achieving the purpose of reducing corrosion.
We should select the diesel engine oil according to the instruction manual for the oil above the CC and CD levels, that is, according to the strengthened strength of the 1800rpm 4 stroke diesel engine set and the temperature of the working environment.
The gas in the cylinder burns, and the piston will swing left and right in addition to the reciprocating linear movement in the cylinder, causing the cylinder liner to vibrate seriously. At this time, the cooling water in contact with the cylinder liner generates bubbles under vibration. Over time, the outer circle of the cylinder liner generates many pits, which gradually expand to form holes, leading to penetration of the cylinder wall.
In order to prevent cavitation erosion of cylinder liner, in addition to measures in design and manufacturing, the following work should be done from the perspective of use, maintenance and repair.
1) Reduce the impact of the piston on the cylinder liner. Under the condition of ensuring basic lubrication, the gap between the piston and the cylinder liner should be as small as possible. At the same time, the verticality of the center of the cylinder liner must be ensured during assembly.
2) Pay attention to the selection and replacement of antifreeze coolant, select qualified products with good anti-corrosion performance, and check frequently during use. The replacement time should not exceed two years.
The use of diesel generator sets shall be carried out in strict accordance with the provisions of the instruction manual of the 227kw four stroke diesel engine set. First of all, ensure the cleanliness of parts such as cylinder liner and body, and the assembly gap of each part. The weight of each piston and connecting rod of the same diesel engine should be as consistent as possible, do not exceed the tolerance, and at the same time, ensure the tightening torque of various bolts and nuts value.
During the use of the crankshaft combination group, it is necessary to pay attention to whether the torsional vibration damper fails and whether the clearance of the bearings is out of tolerance to avoid abnormal vibration of the crankshaft and accelerate early wear of the piston connecting rod group and cylinder liner.
Before the new 12v 550kw diesel engine set or overhauled diesel engine is officially put into use, it must be run-in according to the instruction manual. Generally, the running-in operation of the diesel engine can be put into full load after running for 60 hours. The purpose of running-in is to improve the working conditions of the moving parts of the diesel engine, and to improve reliability and service life.
During the running-in period, the load should be 50%-80%, and the speed is not more than 80% of the rated speed. It should also be careful not to run at idle speed for a long time. After the running-in operation is completed, the oil must be changed carefully. During normal use, high idle speed and overload operation should be avoided.