Rapid calculation and design method for radial sliding bearing with axial pressure difference

Abstract

The invention discloses a rapid calculation and design method for a radial sliding bearing with axial pressure difference, the method comprises the calculation of bearing static characteristic parameters and bearing dynamic characteristic parameters, and known conditions comprise bearing shaft diameter parameters, eccentric parameters and lubrication parameters. Under the working condition of axial pressure difference, the influence of the axial pressure distribution of the radial sliding bearing on the static and dynamic characteristic calculation and parameter design of the bearing is considered, and the oil film pressure, the oil film thickness, the static characteristic parameters and the dynamic characteristic parameters of the bearing are sequentially calculated. The static characteristic parameters comprise oil film force, shaft neck friction force, lubricating oil flow, power loss and effective temperature rise; wherein the dynamic characteristic parameters comprise a rigiditycoefficient and a damping coefficient of the bearing. The method is beneficial to solving the problems of low calculation speed, low efficiency and the like of the characteristic parameters of the existing sliding bearing, and provides a complete standard and method for the design of the radial sliding bearing.

Description

technical field [0001] The invention belongs to the field of sliding bearing design, in particular to a fast calculation and design method for a radial sliding bearing with axial pressure difference. Background technique [0002] Sliding bearings have the advantages of large load capacity, stable operation, high reliability, low noise and long life. Sex is decisive. The gauge pressure on both sides of the traditional radial sliding bearing is zero or there is a slight pressure. With the development of the industry in the direction of intelligence and compactness, radial sliding bearings with differential pressure in the axial direction have begun to receive widespread attention. It can not only It provides radial support for the rotor, and can also be used as an axial seal to reduce leakage. Its typical application is the lower guide bearing of the nuclear main pump in the nuclear power field. [0003] As the only active rotating equipment in the main circuit of the nuclea...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a rapid calculation and design of radial sliding bearings with axial pressure difference in order to solve the problem of complex design steps and large amount of calculation for radial sliding bearings under the working conditions with axial pressure difference method, which includes the calculation of bearing static characteristic parameters (including oil film force and journal friction force, lubricating medium flow rate, bearing power loss and effective temperature rise) and bearing dynamic characteristic parameters (including bearing stiffness coefficient and damping coefficient), known Conditions include bearing shaft diameter parameters, eccentricity parameters and lubrication parameters

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