1, piston oil-free air compressor piston oil-free air compressor from the compressor host, the cooling system, control system, lubrication system, safety valves, motors and control equipment and other components. Compressor and motor bolted on the base, stand on the foundation with anchor bolts. Work by coupling the motor to directly drive the crankshaft, drive rod, crosshead and the piston rod, the piston in the cylinder of the compressor for reciprocating motion, suction is completed, compression, discharge and other processes. The machine is a double-acting compressor that downward movement of the piston up both the air intake, compression and exhaust. 2, screw-type air compressor screw air compressor by the screw head, motor, gas separation barrel, cooling systems, air conditioning systems, lubrication systems, safety valves and control systems and other components. Machine installed in a housing, self-contained, directly on a flat concrete floor can be, without using anchor bolts on the foundation. The screw head is one kind of biaxial positive displacement rotary compressor head. 1 pair of high-precision master (male), Deputy (female) rotor mounted horizontally and parallel to the cabinet interior, the main (male) rotor has five teeth screw air compressor brands, and vice (female) rotor has 6 teeth . Main rotor diameter, small diameter rotor deputy. A helical teeth, both meshing with each other. They are positioned at both ends of the main and auxiliary rotor supported by bearings. Working through the motor coupling (or belt) directly with the main rotor, rotor 2 engaged with each other due to the main rotor is directly driven by the rotor to rotate with vice. Cooling fluid from the compressor casing lower portion of the nozzle is injected directly into the rotor engaging portion, and mixed with a large brand air compressor to remove heat generated by compression, to achieve the cooling effect. While forming a film of air compressor brand outlets, to prevent the gap between direct contact with the rotor and the rotor closed metal to metal and cabinet between. Injected into the coolant can reduce the noise generated by the high-speed compression. Displacement reduced by 1. Decrease in oil displacement has a direct relationship with the lack of oil. Once our production, reduced displacement compressor appeared failure, not only can not make the press roller down, and accompanied by some Knocking sound. We first air muffler checked and be cleaned, and then observe the oil level and found that the oil level is lower than 1/3 of the oil standard position, immediately filling the same brand of oil, and then turn on the power switch, test drive, or have percussion. Later, parts of sports bodies crankshaft, connecting rod, piston, cylinder 11 open, it was discovered that the crankshaft crack compressor brands, see fast break, and presumably short of petroleum has been for some time. Due to lack of oil, dry friction occurs moving parts, overload operation so that all parts are damaged to varying degrees. We damage the moving parts cleaning, polishing, serious replacement, re-install, test machine, Knocking sound disappeared, displacement is also normal. It shows that oil is absolutely indispensable, otherwise endless trouble. Qin Wei Air (FIG), screw air compressor brands, Zhuzhou provided by Xianyang compressor brand Compressor Co., Ltd. Qin Wei. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) to provide "air compressor and accessories, general machinery parts," such as business, the company has "Wei Qin brand, Coatler card (C?te children)" and other brands. Focus on compression, separation equipment and other industries, have higher visibility in Xianyang. Welcomes inquiries, contact: Liu.