An oil-free air compressor

Abstract

The invention discloses an oil-free air compressor and relates to the technical field of air compressors. The technical scheme includes that the oil-free air compressor comprises an engine base, a gasbomb, a crankshaft assembly rotatably arranged in the engine base and a motor driving the crankshaft assembly to rotate; a plurality of air cylinders is arranged on the engine base, a plurality of connecting rods is connected onto the crankshaft assembly, each connecting rod is connected with a piston thereon, the pistons are located in the corresponding air cylinders, the crankshaft assembly includes a plurality crankshaft units, and each crankshaft unit comprises a main journal, a rod journal and a crank arm connecting the main journal with the rod journal; a plurality of driving blocks isarranged on end faces where the main journals of the neighboring crankshaft units aligning mutually, driving grooms are formed among the driving blocks, and the mutually aligned main journals are interlocked through the driving blocks and the driving grooves. By the arrangement of the crankshaft units, delay rotation of the crankshaft units is realized, the air compressor starts with less resistance, the load of motor startup is greatly reduced, and fast startup response is achieved.

Description

technical field [0001] The invention relates to the technical field of air compressors, in particular to an oil-free air compressor. Background technique [0002] Air compressors are equipment for preparing compressed air, and piston air compressors are currently the most widely used. With the development of air compressor technology, oil-lubricated air compressors are gradually replaced by oil-free air compressors. The lubricated wear-resistant material makes sliding contact, so the oil content in the exhaust gas is extremely small, which greatly improves the quality of the exhaust gas. [0003] The Chinese utility model patent with the existing authorized notification number CN207178141U discloses a pump head of a belt oil-free air compressor, including a crankshaft, a crankcase and several cylinders, and the cylinders are fixedly connected to the crankcase and communicated with the crankcase. The crankshaft is connected with connecting rods corresponding to the cylinder...

AI Technical Summary

Problems solved by technology

[0004] However, when the air compressor starts to run, the crankshaft needs to drive multiple pistons to start moving at the same time. Since the piston and the inner wall of the cylinder are in a static state, the static friction between the two is relatively large, and the load on the motor at the initial stage is relatively large. The response time when starting is long; in extreme situations such as low voltage and poor lubrication, the air compressor may not be able to start

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