Axial force bearing test structure of elastic foil dynamic pressure gas thrust bearings

Abstract

An axial force bearing test structure of elastic foil dynamic pressure gas thrust bearings comprises two thrust bearing force testing pieces, strain gages are attached to the two thrust bearing force testing pieces, two elastic foil dynamic pressure gas thrust bearings are fixed on two thrust bearing seats respectively, and the two thrust bearing seats and a distance ring are connected to constitute an assembly. The thickness the gas gap between the elastic foil dynamic pressure gas thrust bearings and a thrust disk is adjusted through the distance ring, it is guaranteed that the assembly slides freely in the axial direction in a shell through girder grinding, the periphery of the assembly is fixed, and the assembly is fixed in the shell through an end cover. Axial force borne by a rotor is applied to the two thrust bearing seats through the thrust disk, the axial force borne by the two thrust bearing seats is applied to the two thrust bearing testing pieces and is accurately measured by the strain gages, the sum of the stress borne by the strain gages is the axial force borne by the rotor, and the structure is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of sensing, measurement and control, in particular to an axial force testing structure of an elastic foil dynamic pressure gas thrust bearing. Background technique [0002] During the operation of rotating fluid machinery (including pumps, fans, compressors, expanders, turbines, water turbines, propellers, turbine engines, etc.), axial forces will be generated due to the interaction between the rotor and the fluid. The rotor axial force is one of the important indexes in the structural design of rotating fluid machinery. If the axial force does not meet the design requirements, the bearing may be in an overloaded working state for a long time, which will directly affect the life of the bearing, and seriously affect the life and stability of the whole machine. Therefore, with the application of elastic foil gas bearings in high-speed rotating machines such as turbines and gas turbines, it is particularly imp...

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Problems solved by technology

However, because the thickness of the elastic foil dynamic pressure gas thrust bearing is small, the force sensor cannot be installed, so the above structure cannot be used for measurement

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