Method for detecting and recovering axis sinking of large section of wind tunnel

Abstract

The invention discloses a method for detecting and recovering axis sinking of a large section of a wind tunnel. The method comprises the following steps: measuring and establishing a tunnel body state reference; the super-expansion section is retreated in place, and the telescopic section is supported and fixed; the super-expansion section and the telescopic section are disconnected; the whole super-expansion section is lifted; cleaning the guide rail slide block; detecting the planar guide rail and the V-shaped guide rail, and repairing the planar guide rail and the V-shaped guide rail; local high points of the guide rail sliding block are repaired; gaskets are arranged at the joints of the guide rail sliding blocks and the super-expansion section body, and all the connecting parts of the super-expansion section are reset and fastened in place; respectively moving the super-expansion section to a transonic speed test station and a supersonic speed test station, moving the attack angle of the model to a zero position, measuring the axis of the super-expansion section, and analyzing data until the height direction and the transverse direction meet the requirements; and iterating for multiple times until the comprehensive effect meets the maintenance requirement. The problem of detection and repair of sinking of the super-expansion section is solved, the problems that hooks are clamped, auxiliary supporting rollers are frequently damaged and the like are effectively solved, and meanwhile the basic consistency of the state of a hole body before and after is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of equipment inspection and maintenance. More specifically, the invention relates to a method for detecting and recovering the axial subsidence of a large section of a wind tunnel. Background technique [0002] A wind tunnel is a pipeline-shaped ground test simulation device that can artificially generate and control airflow to simulate the flow of air around an aircraft or object, and can measure the effect of airflow on an object and observe physical phenomena. It is mainly composed of several sections and ventilation pipes. , the axis of each section has a corresponding coaxiality requirement with the main axis of the cave body according to its position and function. In a wind tunnel in China, the super-expansion section and the support section are an integrated structure, and a model support mechanism is arranged at the entrance. It is necessary to ensure that the model is installed behind the support me...

AI Technical Summary

Problems solved by technology

A domestic wind tunnel has been in operation for nearly 40 years, and the problem of axial subsidence of the super-expansion section is becoming more and more serious, which not only affects the quality and efficiency of wind tunnel tests, but also becomes a major hidden danger to structural safety

After the super-expansion section axis sinks, the super-expansion section 13 and the front supersonic test section 12 will be seriously jammed when they are closed. Only by frequently grinding the lower surface of the hook can they pass through the square hole; the super-expansion section axis sinking will also cause super The auxiliary support rollers on both sides of the track below the expansion section are under heavy pressure, and the bearings are frequently damaged and difficult to replace

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