Vacuum high-low temperature composite loading device

A vacuum high-low temperature composite loading device comprises vacuum high-low temperature circular mold equipment, a driving mechanism, a loading lever, a bearing assembly, a coupler, a switching supporting seat, a torque sensor, an inertia load and a magnetic powder brake. The vacuum high-low temperature circular mold equipment with a magnetofluid sealing shaft can realize the vacuum environment simulation of the mechanism. At the output shaft end of the driving mechanism, a loading lever which is supported by a space solid lubrication bearing is adopted, so that the acting force at the shaft end is applied. Torque loading equipment connected with a mechanism output shaft through a magnetofluid sealing shaft is adopted outside the vacuum high-low temperature circular mold equipment. An inertia load loading device connected with the mechanism output shaft through the magnetofluid sealing shaft is adopted outside the vacuum high-low temperature ring mold equipment. In the vacuum high-low temperature environment, the device can simultaneously simulate a moment load, an inertia load and a shaft end acting force, and can accurately apply a load to a mechanism product in the vacuum circular mold equipment in a limited space.