Industrial High Pressure CNG Natural Gas Piston Air Compressor for Gas Filling Station

Natural gas compressor models, dual cylinder, reciprocating piston compressors.

The machine is mainly composed of a compressor, an electric motor, an air circuit system, a cooling system, etc. The structure of its main components is as follows.

The material of the crankcase is gray cast iron, which has sufficient strength and stiffness.

The crankshaft is made of steel and equipped with a counterweight. Before loading, conduct dynamic and static balance tests to ensure smoother operation at rated speed. The crankshaft pin is subjected to high-frequency quenching to increase its wear resistance.

The connecting rod is made of high-quality carbon steel forging, with thin-walled tiles embedded in the large head hole and copper sleeves embedded in the small head.

The crosshead is made of gray cast iron and has threads for connecting the piston rod and a crosshead pin for connecting the connecting rod. Simple structure and reliable use.

Cylinder: Made of gray cast iron and designed with oil-free lubrication, it does not require oil lubrication.

Cylinder head: Made of gray cast iron.

Piston: made of aluminum material; The piston is equipped with piston rings. The material of the piston rings is CRPTFE, which has good self-lubricating and wear-resistant properties and does not require oil lubrication.

The piston rod is made of 45 # steel material, and the surface that is ground against the packing is treated with high-frequency treatment to improve surface hardness and increase wear resistance. Threaded connection with the crosshead.

Packing box structure:

The packing component is a component that prevents gas leakage from the piston rod in the cylinder. It mainly consists of a packing box, sealing ring, O-ring, etc.

The packing material is CRPTFE, which has good self-lubricating and wear-resistant properties and does not require oil lubrication.

The air valve is a circular valve structure made of all steel material. This type of structural air valve has a large effective flow area in a limited installation section, while also having low noise, reliable operation, and long service life.

Lubrication system

1. Lubrication of bearings, crankshafts, connecting rods, and crosshead rails

They are lubricated through oil pump pressure.

2. Cylinder lubrication

The lubrication of the cylinder is achieved through the formation of an extremely thin solid lubricating film between the cylinder mirror surface and the supporting ring and piston ring filled with polytetrafluoroethylene, which provides self-lubricating effect without the need for lubricating oil.