Piezoelectric balance calibration loading sleeve

Abstract

The invention provides a piezoelectric balance calibration loading sleeve. The piezoelectric balance calibration loading sleeve comprises a loading sleeve body, a loading nail, a nut and a loading line. The piezoelectric balance calibration loading sleeve is used for applying a load in piezoelectric balance calibration, determining the position of a calibration load action point and calibrating load direction, wherein a measuring plane is arranged on the loading sleeve body, thereby facilitating measuring position of the loading sleeve and ensuring correctness of the load direction. The loading nail has a form of being inserted from outside to inside and matching with a conical surface, thereby ensuring position of a calibration load force vector loading point, realizing higher convenience in replacing the loading point position and load magnitude, and improving repetition precision and calibration efficiency in piezoelectric balance calibration loading.

Description

technical field [0001] The invention belongs to the field of piezoelectric balance calibration and loading devices, and in particular relates to a piezoelectric balance loading sleeve. Background technique [0002] The wind tunnel is the main equipment for testing the aerodynamic characteristics of various aircraft models. According to the operating characteristics of different wind tunnels, corresponding balances have also been invented. The piezoelectric balance is a force-measuring test balance developed for the characteristics of short-time pulse operation in the shock tunnel, which meets the demand for measuring the aerodynamic force on the model in the millisecond-level test time of the shock tunnel. [0003] In order to accurately measure the aerodynamic load acting on the model in the wind tunnel test, the wind tunnel balance needs to be calibrated before the test to obtain the service coefficient of the balance. During the wind tunnel test, according to the output o...

AI Technical Summary

Problems solved by technology

This loading scheme is effective for the static calibration of the strain balance, but for the dynamic calibration of the piezoelectric balance, due to the complexity and clearance of the knife-edge device, which is the same as the spherical hinge, it cannot ensure that the position of the loading point is repeated, so that the piezoelectric balance cannot be satisfied. Requirements for repeatability accuracy of balance calibration

In addition, the quality of the knife-edge device itself is relatively large, and it is difficult to calibrate small loads

Images