Floating frame type axial force strain balance

Abstract

The invention discloses a floating frame type axial force strain balance which is an integral structure and formed by integrally cutting a column. The column is axially cut to form four column beams and a middle beam; the four column beams are circumferentially and evenly distributed around a central axis of the column; the middle beam which is a hollow structure is located at a central position of the column; the left end of the middle beam is not longer than the left ends of the column beams; annular connection rings are retained at the right ends of the four column beams and connected withthe middle beam into a whole; supporting sheet beams which are vertical to the central axis are retained at the left ends of the four column beams and connected with the left end of the middle beam into a whole; four elastic sheet beams which are vertical to the central axis are retained at the middle parts of the four column beams and connected with the middle part of the middle beam into a whole so as to form a universally symmetric floating frame type structure; and resistance strain sheets are adhered on the elastic sheet beams. In the invention, by adopting a manner of bending deflectionand circumferential support, four supporting beams are connected by using a connection ring so as to form the universally symmetric floating frame type structure, so that the normal (Y) and lateral (Z) vibration resisting capability of an element is improved.

Description

technical field [0001] The invention relates to an axial force strain balance, in particular to a floating frame type axial force strain balance used in a pulse wind tunnel, and belongs to the technical field of aerodynamic measuring devices. Background technique [0002] Wind tunnel test is the most important research method in the shape design of aircraft. To obtain high-precision aerodynamic data in the process of wind tunnel test, a high-precision aerodynamic measurement balance is necessary. For general aircraft, the axial force (X component) is a small quantity, and it is the most difficult component to measure in aerodynamic force measurement. In the design of the strain balance, in order to improve the output signal of measuring the axial force, the stiffness of the axial force element should be reduced; in order to reduce the interference of other components on the axial force measurement, the axial force element is required to have a relatively high performance und...

Images