Static rigidity testing system for air floatation thrust bearing

The utility model discloses a static stiffness test system for an air-floating thrust bearing. The static stiffness test system comprises an air-floating bearing, an ejector rod, a test platform, a loading cylinder, a pressure sensor, a precise pressure regulating valve and an air film thickness measuring assembly, the air bearing is arranged on the test platform, and a plurality of air inlet holes are formed in the side surface of the air bearing; the loading cylinder is positioned above the air bearing and is fixed on the test platform; the pressure sensor is connected with the loading cylinder; the ejector rod is connected with the pressure sensor, and the ejector rod is in linear contact with the air bearing; the precise pressure regulating valve is connected with the loading cylinder; the gas film thickness measuring assembly comprises a gas film thickness detecting plate and a capacitance sensor, the gas film thickness detecting plate is fixed to the side face of the gas bearing, and the capacitance sen