Service HotlineWith the continuous improvement of our living standards, various industries have also developed, which has driven the development of the SL3NB1300 cylinder liner for Qingzhou Pump. Now the SL3NB1300 cylinder liner of Qingzhou pump has won the trust of a large number of users, but there are also some precautions that need to be understood by users for the SL3NB1300 cylinder liner of Qingzhou pump. Today, we will provide a detailed introduction:
During the use of the SL3NB1300 cylinder liner for Qingzhou pump, it is necessary to strengthen the maintenance of the filter screen. Keeping the air filter, oil filter, and fuel filter in good working condition is crucial for reducing wear on the SL3NB1300 cylinder liner of the Qingzhou pump. Strengthening the maintenance of the "three filters" is an important measure to prevent mechanical impurities from entering the cylinder, reduce the wear of the Qingzhou pump SL3NB1300 cylinder liner, and extend the service life of the engine.
During the use of the SL3NB1300 cylinder liner for Qingzhou pump, the correct lubricating oil should be selected. Viscosity lubricating oil should be strictly selected according to the season and engine performance requirements. Poor quality lubricating oil should not be purchased at will, and the quantity and quality of lubricating oil should be regularly checked and maintained.
3. Improve the quality of warranty. During use, promptly identify and eliminate problems, and replace or repair damaged or deformed components at any time. When installing the SL3NB1300 cylinder liner of Qingzhou pump, strict inspection and assembly should be carried out according to technical requirements. In the operation of replacing the warranty ring, a piston ring with appropriate elasticity should be selected. If the elasticity is too small, it will cause gas to enter the crankcase, blow off the oil on the cylinder wall, and increase the wear of the cylinder wall; Excessive elasticity can directly exacerbate the wear of the cylinder wall or damage the oil film on the cylinder liner wall of Qingzhou pump SL3NB1300.
4. Maintain the normal operating temperature of the engine. The normal operating temperature of the engine should be 80-90 ℃. If the temperature is too low to maintain good lubrication, it will increase the wear of the cylinder wall. The water vapor in the cylinder liner of Qingzhou pump SL3NB1300 is prone to condense into water droplets, dissolve the acidic gas molecules in the exhaust gas, and generate acidic substances, resulting in corrosion and wear of the cylinder liner wall of Qingzhou pump SL3NB1300. The experiment shows that when the wall temperature of the SL3NB1300 cylinder liner of Qingzhou pump drops from 90 ℃ to 50 ℃, the cylinder wear is four times that of 90 ℃. Excessive temperature can reduce the strength and wear of the cylinder, and even cause the piston to expand excessively, resulting in "cylinder expansion" accidents.
Start and start correctly. When the engine is started cold, the low oil temperature, high viscosity, and poor fluidity cause insufficient oil supply from the oil pump. At the same time, the oil on the cylinder liner of the original Qingzhou pump SL3NB1300 flows down along the cylinder wall after parking, and cannot be well lubricated at the moment of starting as it does during normal operation, greatly increasing the wear of the cylinder liner wall of the Qingzhou pump SL3NB1300 during start-up. So when starting, the engine should idle a few times and wait for the friction surface to lubricate before starting. After starting, idle and preheat. It is strictly prohibited to forcefully tap the oil port. Wait until the standby oil temperature reaches 40 ℃ before starting. When starting, you should stick to low gear and drive a certain distance in each gear until the oil temperature is normal before switching to normal driving.
The inner surface of the SL3NB1300 cylinder liner of Qingzhou pump is directly affected by high-temperature and high-pressure gas, and always experiences high-speed sliding friction with the piston ring and piston skirt. The appearance comes into contact with cooling water, causing severe thermal stress under large temperature differences and corrosion by the cooling water. The lateral thrust of the piston on the SL3NB1300 cylinder liner of Qingzhou pump not only intensifies its internal friction, but also causes it to bend. When the lateral thrust changes direction, the piston also hits the cylinder liner of Qingzhou pump SL3NB1300.
In addition, it is subjected to significant installation preload force. The gas pressure causes tangential tensile stress and radial compressive stress on the cylinder wall, and the inner surface is large, all of which are high-frequency pulsating stresses. The functions of the SL3NB1300 cylinder liner for Qingzhou pump include:
1. Together with the cylinder head and piston, it forms the working space of the cylinder.
2. The cylinder liner of the Qingzhou pump SL3NB1300 in a cylindrical piston diesel engine bears the lateral thrust of the piston, becoming the guide for the reciprocating motion of the piston.
3. Transfer the heat from the piston assembly and itself to the cooling water to ensure an appropriate operating temperature.
The cylinder liner of the Qingzhou pump SL3NB1300 in a two-stroke diesel engine is equipped with an air port, which is opened and closed by a piston to achieve valve distribution.
Due to the large thermal stress caused by the temperature difference between the inside and outside of the cylinder wall, compressive stress is generally generated on the inner surface at high temperatures, while tensile stress exists on the cooling surface. But at extremely high temperatures, the metal near the inner surface undergoes creep plastic deformation, and residual tensile stress is formed on the inner surface after cooling. This low-frequency stress caused by changes in starting and stopping can cause material fatigue.
