Mechanical-bearing supported small asymmetrical reentry body aerodynamic force measuring apparatus

The invention provides a mechanical-bearing supported small asymmetrical reentry body aerodynamic force measuring apparatus. The measuring apparatus is implemented through a measuring method using nested combination of inner and outer balances, wherein the inner balance selects a normal rod type 6-component balance structure; the outer balance selects a hollow radial structure; and the inner and outer balances are connected through a mechanical bearing with smaller rolling frictional damping. The measuring apparatus includes a tail support rod, a mechanical-bearing support device, a back segment of a model, and a front segment of a model, wherein the tail support rod is fixedly connected with the mechanical-bearing support device and a model mechanism; the mechanical-bearing support device is connected with the back segment of a model; and the back segment of a model is in threaded connection with the front segment of a model. The aerodynamic force measuring apparatus has the advantages of being simple in structure, being small in volume and being high in rigidity, can distribute different measuring components on the inner and outer balances according to the coupling feature of the measuring load and the balance structure constrained condition, is suitable for a hypersonic wind tunnel test for small asymmetrical reentry body aerodynamic force measurement, and is especially able to control the measuring interference of other large load components on a small roller torque to improve the measuring accuracy.