Fusheng air compressor: common accident analysis of air compressor
In general, common accidents of air compressors have accidents and combustion explosions. The following analysis of Fusheng air compressors provides users with reference.
Crankshaft fracture: When the air compressor is heat treated, the rounded corners are not treated, resulting in stress concentration at the junction; irregular fillet processing, partial cross-section abrupt change; overload operation time is long, users use improperly increase the speed to force The condition deteriorated; the quality of the material itself was defective. In addition, cracking at the oil hole on the crankshaft causes breakage to be seen. Most of the fracture problems occur at the rounded corners of the journal and the crank arm.
Fracture of the connecting rod: plastic deformation is caused by the long-term use of the connecting rod screw; the contact between the screw head or the nut and the large end surface produces an eccentric load, which can be as large as seven times as much as the simple axial pulling force of the bolt. Therefore, there can be no A slight skew condition, while the contact is evenly distributed, the distance at which the contact point is broken is appropriate.
The piston rod is broken: it is the thread connected to the crosshead and the thread of the fastening piston. These two parts are the weak links of the piston rod and are more prone to breakage. If there is no problem in design, processing and material, the pre-tightening force should not be too large during installation, otherwise the piston rod will break when the maximum force reaches the yield limit. After long-term operation, due to the transitional wear of the cylinder, the piston in the horizontal column will sink, so that additional load will be generated at the connecting thread. If it is operated again, the piston rod may be broken, so special attention should be paid during maintenance.
Cylinder and cylinder head rupture: For water-cooled machines, the cooling water in the cylinder and cylinder head is not exhausted and the cylinder and cylinder head are broken after running under low temperature conditions. Therefore, in the north of China, especially In low temperature areas, cooling water must be drained after parking.
Combustion and explosion accidents: When the lubricating oil in the cylinder is not well filtered, the gas containing a large amount of dust is sucked into the cylinder, and the carbon deposit forms a contact with a gas containing a large amount of volatile matter to cause an explosion. In addition, before the compressor is tested with gas load, it is possible to drive out the air without using low-pressure nitrogen gas, which may cause an explosion accident. After driving, the compressor was not opened to the valve of the gas tank, causing the explosion pressure to rise sharply and causing an explosion.
Fusheng air compressor reminds the user that due to the tightness of the compressor high-pressure air valve, the gas returns to the cylinder under the condition of high temperature and high pressure. When there is carbon deposit, it will cause an explosion accident. In order to avoid causing combustion and explosion accidents, it is necessary to repair the exhaust valve, check the leaking parts, and regularly clean the grease in the gas storage tank and pipeline to eliminate potential safety hazards.
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