Compressor Overheating Fault

Overheating occurs when the temperature surpasses the specified value at the friction points between the bearings and crankshaft, sliding plate and crosshead, as well as piston rod and packing. Such overheating has grave consequences. Firstly, it accelerates the wear between these friction pairs. Apart from that, the excessive heat energy gradually accumulates, ultimately leading to the ignition and burning of the friction surface, thereby causing catastrophic accidents involving the machine. The principal reasons behind the overheating of bearings include an uneven fit between the bearing and journal, resulting in a small contact area. Furthermore, if the bearing gets skewed or the crankshaft is bent, it can lead to overheating. Inadequate viscosity of the lubricating oil, blockages in the oil circuit, and malfunctioning oil pump, causing oil cut-off, are also contributing factors. Additionally, during the installation process, the absence of proper leveling or clearance, misalignment between the main shaft and motor shaft, and the tilting of the two shafts can also result in overheating.

 

Wear of bearing parts
Compressor transmission parts often suffer from wear and tear, particularly in areas such as bearing positions, bearing seats, bearing chambers, keyways, and threads. Repairing these parts traditionally involves methods like repair welding and brush plating spraying. However, both methods have their limitations. Repair welding introduces thermal stress at high temperatures, which can potentially damage the material, leading to bending or even breakage of the component. On the other hand, brush plating is constrained by coating thickness and tends to peel off easily. Furthermore, both techniques merely utilize metal to repair metal, maintaining the "hard to hard" relationship and vulnerable to re-wear due to various forces acting on the component.

 

In contemporary Western countries, the use of polymer composite materials for repairing compressor transmission parts' wear and tear is gaining popularity. Among these, the American Meijiahua technology system is the most well-established. This system provides exceptional adhesion and compressive strength, making it highly effective in repairs. Unlike welding, it doesn't subject the component to thermal stress. Additionally, the repair thickness is not limited, offering more flexibility. The polymer composite material possesses unique flexibility, enabling it to absorb equipment impact and vibrations, effectively preventing further wear and tear. Notably, this repair method allows for easy disassembly without the need for machining. Overall, the utilization of polymer composites presents a reliable solution for addressing the wear and tear issues in compressor transmission parts.