An oil-free compressor for a rail vehicle includes a compressor housing, a first low pressure piston cylinder supported in the compressor housing, a second low pressure piston cylinder supported in the compressor housing, a first high pressure piston cylinder supported in the compressor housing, a second high pressure piston cylinder supported in the compressor housing, and a crankshaft assembly supported by the compressor housing and linked to pistons of the piston cylinders by respective connecting rods. The first and second low pressure piston cylinders and the first and second high pressure piston cylinders are positioned in an X-shaped configuration around an outer circumference of the compressor housing. The first and second high pressure piston cylinders are configured as first and second lower legs of the X-shaped configuration, and the first and second low pressure piston cylinders are configured as first and second upper legs of the X-shaped configuration.

Radially configured oil-free compressor

The invention discloses an electric oil-free main air compressor, and belongs to the technical field of air compressors The electric oil-free main air compressor comprises a fan, an air compressor body, a motor, a cooler, dampers, water drainage electromagnetic valves, a pull rod and a housing The cooler comprise a middle cooler body and a rear cooler body At least four dampers are mounted on a fan support and a motor support correspondingly, and are connected with an automobile body The water drainage electromagnetic valves are mounted at the lower end of the middle cooler body and the lower end of the rear cooler body The pull rod enables the motor support and the air compressor body to be connected and locked A damping material layer is arranged in the housing, and the air compressor body is composed of a main shell and a compression cylinder assembly A bent axle is arranged in the main shell, and the compression cylinder assembly is in an X shape and is composed of at least one high-pressure cylinder assembly and at least two low-pressure cylinder assemblies According to the electric oil-free main air compressor, the potential hazards of oil leaking and mixing of the air compressor are avoided through air cooling, and the maintaining cost is lowered; the compression cylinder assembly forms reasonable air flow direction, and the maximum cooling efficiency is achieved; damping materials are coated on the housing, and noise is lowered

Electric oil-free main air compressor

An oil-free compressor for a rail vehicle includes a multi-piece compressor housing, a first piston cylinder supported in a first opening in the compressor housing, a second piston cylinder supported in a second opening in the compressor housing, a multi-piece crankshaft assembly supported by the compressor housing, and an optionally filtering air plenum in fluid communication with the compressor housing interior to provide a volume of air to the compressor housing interior. The crankshaft assembly is linked to pistons of the first and second piston cylinders by respective connecting rods. The connecting rods connect to a wrist pin associated with each of the pistons, and the wrist pins are respectively supported by a dry lubricant bushing to the associated piston. The compressor housing may have a first housing portion and a second housing portion forming respective halves of the compressor housing.

Oil-free air compressor for rail vehicles with air ventilation

The invention discloses a two-stage compression vehicle piston type oil-free air compressor. A filtering structure and a flywheel shaft are further arranged in a crankshaft box. A motor drives the flywheel shaft to rotate through a motor shaft. A low-pressure piston cylinder and a high-pressure piston cylinder are arranged at the two ends of the flywheel shaft. The flywheel shaft can drive a low-pressure piston connecting rod assembly and a high-pressure cylinder piston connecting rod assembly to do reciprocating motion. Primary compression of air is completed through the combined action of a low-pressure air outlet valve plate assembly and an air inlet valve piece. The air subjected to primary compression enters the high-pressure piston cylinder through an air pipe 30 to be subjected to secondary compression, and the compressed air is finally cooled to be low-temperature high-pressure air through a cooling source. According to the two-stage compression vehicle piston type oil-free air compressor, the air compressor contains an air filter; two-stage filtering is adopted; early abrasion of a moving part is avoided through the clean inlet air; the service life is longer; two-stage compression is adopted; two-stage cooling is conducted through an intercooler and an after-cooler; the compression efficiency is high; higher exhaust pressure can be obtained; the exhaust temperature is low; and the advantages of being mute, environmentally friendly, savable in energy, compact in structure, small in size, light in weight, low in height, small in vibration and the like are achieved.

Two-stage compression vehicle piston type oil-free air compressor

The invention provides a compressor crankshaft and a compressor with same. The compressor crankshaft comprises a main shaft, a first eccentric circle, a second eccentric circle and a third eccentric circle, wherein the first eccentric circle, the second eccentric circle and the third eccentric circle are arranged on the main shaft at intervals in sequence, wherein the first eccentric circle and/or the third eccentric circle is detachably arranged on the main shaft. According to the invention, the compressor crankshaft is changed into a plurality of parts, and can overcome a problem that a roller cannot sleeve the middle eccentric circle internally, namely the second eccentric circle while the compressor crankshaft is installed; no matter how large the angle among eccentric lines of the first eccentric circle, the second eccentric circle and the third eccentric circle is, the roller has no limit in a process that the roller sleeves the first eccentric circle, the second eccentric circle and the third eccentric circle, so that necessary structure foundation is provided for producing and machining a three-stage compressor.

Compressor crankshaft and compressor with same

An oil-free compressor for a rail vehicle includes a multi-piece compressor housing, a first piston cylinder supported in a first opening in the compressor housing, a second piston cylinder supported in a second opening in the compressor housing, and a multi-piece crankshaft assembly supported by the compressor housing. The crankshaft assembly is linked to pistons of the first and second piston cylinders by respective connecting rods. The connecting rods connect to a wrist pin associated with each of the pistons, and the wrist pins are respectively supported by a dry lubricant bushing to the associated piston. The compressor housing may have at least a first housing portion and a second housing portion. The first housing portion and the second housing portion may form respective halves of the compressor housing that are secured together with mechanical fasteners.

Roland S. Moore

Papers

Oil-free air compressor for rail vehicles

Oil-free air compressor for rail vehicles with air ventilation