Technical features of DF-G compressor:

1）The structure of the machine body adopts the structure of an integral fully enclosed rib structure, which is characterized by a large number of main bearing stalls, compact arrangement and strong rigidity; Auxiliary bearings are set at the connection with the main motor, so that the motor can adopt a single support structure.

2）The crankshaft is an alloy steel forging with high tensile strength, which has been stress relieved and heat treated. All main journals and crankshafts have been precision ground and polished, and their surface roughness is 0.4 μ m。 Cranks involve odd and even numbers. One gear main bearing is set between each crank, and two gear main bearings are set at the drive end. In this way, smaller deflection, stress and bearing load can be obtained. When necessary, a counterweight fastened with screws is added to the crank arm.

3）DF-G unit adopts hydraulic tightening structure, which is different from the connection structure designed in China in that the hydraulic tightening puller is only used as a random tool and is not designed on the crosshead like the domestic structure. The main bearing bush and connecting rod big end bush are made of aluminum magnesium alloy; The crosshead is cast iron; Small head tiles are bronze.

4）The cylinder can be lubricated with or without oil. The cylinder materials include cast iron, ductile iron, steel or forged steel. The cylinder block is basically designed as a "through cylinder" structure. The air passages are arranged as upper inlet and lower outlet, equipped with replaceable dry cylinder liners. Large valve hole design, resistance coefficient is relatively small.

5）The piston is made of cast iron, forged steel, aluminum alloy and other materials; The piston rod is made of alloy steel and stainless steel to meet various applications. The piston rod thread is pressure rolled, and a variety of self-lubricating organic material piston support rings and piston rings are used. According to the different working environments, the support ring can be designed with components, whole structures, etc. The running end face and vertical running end face of the support ring are equipped with different numbers of inclined guide grooves or pressure guiding holes. During operation, the support ring is driven by air pressure to rotate freely, which not only ensures the support function, but also makes it wear evenly and improves its service life significantly.

 

DF-G compressor product display: