A ship-type aero-engine thrust force measuring platform

Abstract

The invention provides a ship type aero-engine thrust force measuring rack, and belongs to the technical field of thrust testing devices. The ship type aero-engine thrust force measuring rack comprises a moving frame, a static frame, a force measuring unit and a calibration force loader, wherein a through groove is formed in the static frame; the moving frame is rotationally connected with one group of opposite edges of the through groove through a rotating shaft; a group of symmetric vertical plates are fixed on the moving frame, and a group of engine mounting seats are arranged at the upperends of the vertical plates; a group of limiting plates with L-shaped cross sections are symmetrically arranged on the static frame table top corresponding to the other group of opposite sides of thethrough groove; the horizontal plates of the limiting plates are located above the through groove; a calibration force loader is arranged at the bottom of the horizontal plate of the limiting plate onone side, and a force measuring unit is arranged at the bottom of the horizontal plate of the limiting plate on the other side; a fine adjusting auxiliary supporting frame is further arranged on thestatic frame; the fine adjusting auxiliary supporting frame is in sliding connection with the static frame; and a position centering fine adjustment device is arranged on the fine adjusting auxiliarysupporting frame. According to the force measuring rack, the moving frame is limited to the through groove, the overall gravity center is low, the safety is high, the thrust eccentric phenomenon can be well overcome, and the measuring precision is high.

Description

technical field [0001] The invention belongs to the technical field of thrust testing devices, and in particular relates to a ship-type aero-engine thrust measuring stand. Background technique [0002] Thrust is one of the main performance indicators of an engine, and accurate measurement of engine thrust is of great significance to engine development and performance evaluation. According to different installation methods, there are two types of thrust benches commonly used at present: suspension type and support type, and ordinary flexible parts (spring leaf) or universal flexible parts (fork spring) are used to suspend or support the moving frame. The advantage of using flexible parts is that the elastic deformation of the material itself provides freedom of movement. However, since the load cell cannot be installed in front of the engine air intake or behind the nozzle, almost all current benches are off-axis support tables. The thrust eccentricity phenomenon will inevit...

AI Technical Summary

Problems solved by technology

The advantage of using flexible parts is that the elastic deformation of the material itself provides freedom of movement. However, since the load cell cannot be installed in front of the engine air intake or behind the nozzle, almost all current benches are off-axis support tables. The thrust eccentricity phenomenon will inevitably occur if there is an off-axis suspension stand or an off-axis suspension stand, that is, there is an angular offset between the axis of the engine and the axis of the load cell, which cannot ensure that the thrust of the engine is accurately transmitted to the thrust sensor, resulting in a certain measurement error.

Images