Processing method for crankshaft of compressor

A processing method and crankshaft technology are applied in the field of crankshafts, which can solve the problems of increased eccentricity of the crankshaft and insufficient torque transmission capacity, and achieve the effects of improving air tightness and improving work efficiency.

Inactive Publication Date: 2013-07-17
NANJING HENGDA COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of the eccentricity of the crankshaft, it is obviously not feasible to manufacture the crankshaft with the original method, and the ability to transmit torque is not enough.

Method used

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  • Processing method for crankshaft of compressor
  • Processing method for crankshaft of compressor
  • Processing method for crankshaft of compressor

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the present invention is described in detail:

[0022] The structure of crankshaft of the present invention is as figure 1 As shown, it includes a crank 1 and a crankshaft 4, wherein the crank 1 and the crankshaft 4 are interference fit. The specific processing steps are: first, design the outer diameter of the crankshaft as Φ55, the deviation is (+0.018 +0.008), the design size of the crank aperture is Φ55, the deviation is (-0.165 -0.190), and the interference is △min =0.173, △max=0.208; then the aperture of the crank is heated to 500-600°C by induction heating, preferably in the range of 540-550°C. In this embodiment, the heating temperature is 550°C. The crank hole is increased by 0.1-0.2mm after heating, and the crankshaft can be easily inserted into the crank hole vertically as required in this case, and finally cooled and shaped.

[0023] In the present invention, after the crankshaft and crank are assembled by me...

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Abstract

The invention discloses a processing method for a crankshaft of a compressor. The crankshaft includes a bent shaft and a crank. The processing method includes: (1), processing magnitude of interference of the external diameter of the bent shaft and the bore diameter of the crank respectively to be delta min=0.173, delta max=0.208, and the external diameter size of the bent shaft is 50-60mm; and (2), heating a position where a crank pore is located to 500-600 DEG C by means of induction heating, inserting the bent shaft into the crank pore prior to cooling formation. By the arrangement, the magnitude of the interference of the bent shaft and the crank is increased, so that greater torque can be transmitted by the crankshaft, and greater load can be borne. Faults of high voltage piston-type compressors caused by the bent shaft and the crank moving correspondingly during actual use are greatly avoided.

Description

technical field [0001] The invention relates to a crankshaft of a compressor, in particular to a processing method for the crankshaft. Background technique [0002] Existing sector compressors have a three-stage compression structure. A total of four cylinders and pistons are divided into two first-stage, one second-stage and one third-stage. The compressor reciprocates under the drive of the crankshaft, and the structural form of the crankshaft is a single-support cantilever type. [0003] The single-support cantilever crankshaft has simple process and low cost, and the large end of the connecting rod is integral and has high strength. Miniature low-pressure air fan compressor adopts this structure. The structural characteristics of this kind of crankshaft: the crankshaft material is alloy steel, and the crankshaft is malleable cast iron, which are processed and formed separately and pressed into a whole by cold pressing. [0004] The material of the crank is malleable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P11/02
Inventor 孙春蕾
Owner NANJING HENGDA COMPRESSOR
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