Multistage elastic support mechanism and gas hydrodynamic thrust bearing

Abstract

The invention belongs to the technical field of mechanical equipment, and particularly relates to a multistage elastic support mechanism and a gas hydrodynamic thrust bearing. According to an existingbubbling radial gas hydrodynamic bearing, a support chaff is composed of elastic chaffs with bubbles and flat chaffs, the volume of the bubble is small, thus the support stiffness is limited, and friction damages and uncertain impacts are prone to occurring in the start-stop and operation processes. The invention provides the multistage elastic support mechanism, the multistage elastic support mechanism comprises a flat chaff assembly and an elastic tube chaff assembly, the flat chaff assembly and the elastic tube chaff assembly are sequentially arranged, the flat chaff assembly comprises multiple flat chaffs, and the elastic tube chaff assembly comprises a plurality of elastic tube chaffs; the elastic tube chaffs comprises elastic tube surfaces, a plurality of through holes are formed inthe elastic tube surfaces, the through holes are connected with one sides of bent roll parts, the bent roll parts are in protruded shapes, and the bent roll parts are bent by multiple layers. Stiffness and load are born in a grading mode, flow-around is increased to increase a heat exchange area, heat loss after long time bearing is further facilitated, and the operation performance is further improved.

Description

technical field [0001] The application belongs to the technical field of mechanical equipment, and in particular relates to a multi-stage elastic support mechanism and a dynamic pressure gas thrust bearing. Background technique [0002] The dynamic pressure gas bearing forms a wedge-shaped gap between the two relatively moving surfaces of the shaft and the bearing. The gas is driven by its own viscosity and compressed in the wedge-shaped gap to generate a pressure field, thereby supporting the high-speed rotation of the rotor. Obviously the gas film stiffness of the dynamic pressure gas bearing is lower than that of the static pressure gas bearing, but its dynamic pressure effect will increase obviously with the increase of the rotational speed. Its outstanding advantage is that it does not need an external pressure gas source, which is very beneficial to reduce the complexity of the device, improve the economy of the turbomachinery and expand its application range. With th...

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Problems solved by technology

However, the bubble volume is small and the support rigidity is limited, and the problems of friction damage and uncertain impact are prone to occur during start-stop and operation. This application provides a multi-stage elastic support mechanism and a dynamic pressure gas thrust bearing.

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