Piston ring failure analysis of Luoyang oil-free lubrication air compressor

Piston ring failure analysis of Luoyang oil-free air compressor
From the self-lubricating principle of the oil-free air compressor, it can be seen that after the self-lubricating film layer is established, the piston ring and the guide ring interact with each other when they reciprocate in the cylinder. What is being ground is not the cylinder wall but its own film. Once this film is damaged or fails to form on the cylinder wall, it will cause the piston ring and guide ring to directly rub against the metal cylinder wall. In this case, the piston ring and guide ring will quickly wear out and be scrapped.
Poor cooling effect of the cooler leads to excessively high operating temperature
This type of air compressor uses hard water that has not been softened. Long-term operation causes severe scaling of the cooler, which greatly reduces the cooling effect and increases the cylinder temperature. . The working temperature of PTFE-filled graphite piston ring materials should generally not exceed
. Excessive temperature will cause the piston ring material to soften and cause rapid wear.
The piston ring or guide ring is swollen with the cylinder wall
The installation clearance of the piston ring's notch is less than its circumferential elongation after thermal expansion. When the thermal expansion occurs, the notch is completely closed and the piston will extend radially. Ring Swelling When the radial expansion of the guide ring is greater than the gap between it and the cylinder wall, the guide ring will swell to death. When the piston ring or guide ring expands in the cylinder, the specific pressure of the contact part between the ring and the cylinder is much higher than that during normal operation. As the specific pressure increases, the friction between the ring and the cylinder wall also greatly increases, causing rapid wear of the ring.
Cylinder surface corrosion
If the inner surface of the cylinder is not properly maintained after a long shutdown, corrosion of the inner surface will also cause wear of the piston ring or guide ring.
New Changzhou Longli Machinery Co., Ltd. is a professional company engaged in the design, installation, repair and maintenance of air compression systems. The company has strong technical force, rich engineering experience and good business reputation. Telephone address: No. Honghe Road, Xinqiao Town, Xinbei District, Changzhou City