A Design Method of Dynamic Bearing Applied to the Crankshaft of Reciprocating Compressor

Abstract

The invention discloses a dynamic load bearing design method applied to a reciprocating compressor crankshaft. The method solves the problems that in the traditional dynamic load bearing design process, parameters are difficult to determine, and characteristic parameter calculation is complex. The design method comprises the steps of width-diameter ratio design and radius gap interval computationin the bearing design process, and further comprises the step of calculation of pressure distribution, minimum oil film thickness, oil film pressure, lubricating oil flow, power loses, equivalent temperature rise and the like of a bearing, all parameter indexes of the bearing are checked more comprehensively, and the design objective safety is high. According to the method, a finite element methodis adopted for solving a Reynolds equation, compared with traditional experience formula computing, more parameters can be obtained, as for the bearing, with the complex variable working condition, like the dynamic load bearing, the design steps are simplified, and the design time is saved; and design of a bearing oil inlet hole is carried out by drawing a cloud picture of a pressure crankshaft angle and a bearing circumferential unfolding angle.

Description

Technical field [0001] The invention belongs to the field of bearing design, and specifically relates to a design method of a dynamic bearing applied to a crankshaft of a reciprocating compressor. Background technique [0002] In the reciprocating compressor, the load acting on the sliding bearing, regardless of size and direction, changes periodically with time. Such bearings are generally called dynamic bearings. As the load changes, the equilibrium position of each instantaneous axis also changes. [0003] The crankshaft in the reciprocating compressor rotates at a constant angular velocity under the action of the flywheel and the governor, and the connecting rod swings at a varying angular velocity relative to the crankshaft and the piston. Because the reciprocating inertia force generated by the moving parts of the reciprocating compressor is difficult to balance, a lower speed can only be used to suppress vibration, and the bearing load is relatively large, so the dynamic be...

AI Technical Summary

Problems solved by technology

Initially, the design parameters of the dynamic load bearing were based on the minimum oil film thickness. With the development of technology, subsequent designs also required the calculation of the maximum oil film pressure and temperature. However, due to the complexity of the dynamic load bearing working conditions, this calculation still cannot satisfy Bearing Safety Requirements

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