Three-cylinder tri-supporting crankshaft for diaphragm pump and processing technology

Abstract

The invention provides a three-cylinder tri-supporting crankshaft for a diaphragm pump and a processing technology and solves the problem that an existing crankshaft is poor in rigidity and strength,heavy in structure or weight, high in cost and hard in processing and assembling technology. The three-cylinder tri-supporting crankshaft comprises an input shaft, a plurality of shaft necks and a plurality of crank arms connected to the shaft necks. The shaft necks successively comprise a first supporting shaft neck, a first connecting rod shaft neck, a second connecting rod shaft neck, a secondsupporting shaft neck, a third connecting rod shaft neck and a third supporting shaft neck connected coaxially to the input shaft; the first supporting shaft neck, the second supporting shaft neck andthe third supporting shaft neck are coaxially arranged; the diameters of the first supporting shaft neck and the third supporting shaft neck are equal and are smaller than the diameters of the secondsupporting shaft neck and the first connecting rod shaft neck; the first, second and third connecting rod shaft necks are equal in diameter and are uniformly distributed circumferentially by taking the axis of the first supporting shaft neck as the center of circle; all the crank arms are of arc reducing transitional structures and the vertical cross-section of a connecting line of the centers ofcircles of end surfaces of two sides of each crank arm is elliptic.

Description

technical field [0001] The invention relates to crankshaft technology in a reciprocating pump, in particular to a three-cylinder three-support crankshaft for a diaphragm pump and a processing technology. Background technique [0002] In a reciprocating pump, the crankshaft is one of the important components that convert the rotary motion of the reducer into the circular motion of the crank pin (a component of the crank shaft), which is then converted into the reciprocating motion of the piston. When working, it bears The periodic alternating load produces alternating torsional stress and bending stress, so it is also the most important stressed part in the crank linkage mechanism. [0003] The crankshafts commonly used in reciprocating pumps can be divided into crankshafts, crankshafts, eccentric axles, "N" shaped shafts and other types. Among them, the crankshaft is the most commonly used. The most common crankshafts on the market are three-turn double supports and three-t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of poor rigidity and strength of the existing crankshaft, bulky structure, heavy weight, high price, and difficult processing and assembly technology, the present invention provides a three-cylinder three-support crankshaft for a diaphragm pump and its processing technology

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