Abstract
Aiming at the structural form of a certain rotor system, a double-span three-support rotor system model is established. It is supported by three rolling bearings and has a typical nonlinear characteristic. The fourth-order Runge-Kutta method is used to solve the differential equations and analyze the nonlinear dynamic characteristics of the rotor system when the radial clearance of the bearing changed. The research results: with the increase of the rear bearing radial clearance, the rotor system performs single cycle, periodic two and pseudo-periodic motion. With the three location bearing radial clearance increases, the rotor system performs single cycle, periodic two and periodic four motion. When the radial clearance is bigger, the rotor system performs two periodic motion. The influence law of radial clearance on double span three - braced rotor system is shown.
Highlights
The rolling bearing is widely used in the rotor system of ship-used gas turbine, aero-engine and other rotating power machinery
A low-pressure rotor system of a gas turbine is supported by three rolling bearings, namely a ball bearing and two cylindrical rolling bearings, with
The low pressure compressor rotor of a gas turbine is simplified as a two-span three-support rotor system, which has the characteristic of supporting asymmetry
Summary
The rolling bearing is widely used in the rotor system of ship-used gas turbine, aero-engine and other rotating power machinery. It has the advantages of small kinematic friction coefficient, light weight, easy installation and cooling, etc. Mevel B et al [2] establish a two-degree-of-freedom rotor system model of rolling bearing, considered the radial clearance of the bearing, studied the influence of the change of damping on the bifurcation chaos characteristics of the system, and found three ways to chaos. C. Guo et al [3] establish a dynamic model of rolling bearing rotor system with symmetrical support of three degrees of freedom. A low-pressure rotor system of a gas turbine is supported by three rolling bearings, namely a ball bearing and two cylindrical rolling bearings, with
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