Air compressor crankshaft and manufacturing process thereof

Abstract

The invention belongs to the technical field of compressors, and relates to a crankshaft structure of an air compressor and a manufacturing process of the crankshaft structure. A crankshaft is an assembled crankshaft and comprises an eccentric shaft neck, a crank arm connected with the eccentric shaft neck and a balance block connected with the crank arm or / and the eccentric shaft neck. The crankshaft structure of the air compressor is characterized in that the crank arm and the balance block are each formed by a plurality of flat-sheet-shaped parts in an overlapped assembling mode. The manufacturing process comprises the steps that the flat-sheet-shaped parts are prefabricated and then are mutually fastened into a whole in a rivet connection mode, a bolt connection mode, a flanging folding buckle connection mode and the like. According to the crankshaft structure of the air compressor and the manufacturing process of the crankshaft structure, the flat-sheet-shaped parts are used for constituting the crank arm and the balance block of the crankshaft, and due to the fact that the flat-sheet-shaped parts can be manufactured in a punching mode, the production cost is lower; in addition, the sheet-shaped parts are used for constituting the balance block in an overlaying mode, the mass and the location of the center of mass of the balance block can be adjusted by increasing or decreasing the number of sheets or by adjusting the mounting position according to different compressor products, and therefore more adaptability is achieved.

Description

technical field [0001] The invention belongs to the technical field of compressors, and relates to a crankshaft structure of an air compressor and a manufacturing process thereof. Background technique [0002] Existing reciprocating air compressors all need a crankshaft, so that the crankshaft is used to drive the connecting rod to drive the piston to run, and finally convert the rotational motion of the motor into the reciprocating motion of the piston, thereby realizing the compression of the air working medium. [0003] At present, the crankshaft of a reciprocating air compressor includes components such as journal, crank pin, crank arm, and balance weight. The manufacturing process is often to design and manufacture the above components in one piece, or to design and manufacture the balance weight including the eccentric hole as a whole. Afterwards, it is fastened to the journal, and the above-mentioned crankshaft structure is collectively referred to as an integral cran...

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Problems solved by technology

[0004] Yet above-mentioned traditional integral crankshaft structure of air compressor still has the place worthy of improvement, mainly shows in: 1) it has eccentric axle journal or eccentric crank pin or eccentric balance weight eccentric hole, traditional machining For example, turning and grinding are relatively difficult, and it is easy to cause the stability and consistency of product quality to be difficult to control; 2) In addition, once the overall crankshaft is designed and manufactured, it can only be adapted to a single type of compressor, and cannot flexibly target different series Flexible adjustment of the product, such as products with different displacements but the same speed and piston stroke, the balance layout of the required balance weight changes due to the change of the piston diameter, that is, the setting of the balance weight is different. At this time, it must be designed and manufactured Different crankshafts correspond to different molds, resulting in an increase in production costs and a longer production cycle, so it cannot meet the production requirements of the enterprise

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