XXThird, the melting wear. The welding wear is mainly caused by insufficient lubrication. The piston and the piston ring reciprocate at high speed in the cylinder liner. When the lubrication is insufficient, the oil film cannot be effectively formed between the working faces. Due to the local high heat formed by friction, when such high heat is generated When it accumulates to a certain extent, it will melt and bond the two. If the lubricating oil cannot be replenished in time to restore the oil film, the melting will continue to expand and form a pulling cylinder. The melting wear generally occurs at the top dead center of the cylinder liner. Near the location, the local metal melts and has grooves and wrinkles with uneven irregular edges. When the new machine is loaded with load without running, it is also easy to cause the cylinder to be pulled. The main reason is that the surface of the engine liner without the running-in is rough, the oil film is not easy to form, and the cylinder sleeve and the piston surface may have slight metal contact during the movement. Causes melting and even biting. The key to avoid welding wear is that the oil quality should meet the requirements of the specification. The oil quantity should not be lower than the oil line under the oil ruler. Check the oil regularly.
Four abrasion wear. Abrasive wear refers to the presence of sulfur and other impurities in the fuel, or due to frequent low temperature start-ups. When the fuel is decomposed by sulfur, sulfur dioxide or sulfur trioxide is formed, and when it comes into contact with water, it becomes sulfurous acid or sulfuric acid, causing the inner surface of the cylinder liner to be acid-etched. In the use of the engine, the fuel must be purchased from the regular Sinopec and PetroChina gas stations as much as possible to avoid the use of unqualified fuel to cause harmful damage to the engine.
Through the above analysis and the actual visits and investigations, it is seen that the main reasons for the use of the inner cylinder liner, the piston and the piston ring in the use of the single cylinder machine are often related to improper use, among which: oil bath type Air filter does not add oil, less oil, dirty oil; dry air filter element is dirty, does not clean and replace filter element in time, filter effect is poor; oil is unqualified, not timely check and replace oil, oil is insufficient; single cylinder machine works at low temperature for a long time (Using external circulation cooling water); use of unqualified diesel oil; long-time overload operation, etc. is the most common cause of wear and replacement of single-cylinder cylinder liners. It is hoped that users will avoid the above situations during use and reduce improper use of humans. The resulting cylinder liner is faulty and avoids losses.
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