Adjustable guide vane angle measuring mechanism for compensating deformation difference of double-layer casing

Abstract

The invention belongs to the field of engine design, and relates to an adjustable guide vane angle measuring mechanism for compensating the deformation difference of a double-layer casing, the adjustable guide vane angle measuring mechanism comprises a fixing frame, an intermediate shaft, an angular displacement sensor and an outer casing connecting piece, the fixing frame is connected with an inner-layer casing of an engine, and the angular displacement sensor is arranged on the fixing frame; the inner-layer casing and the outer-layer casing are sealed through the fixing frame after the angular displacement sensor is installed, the inner-layer casing and the outer-layer casing are sealed through the outer casing connecting piece, and when the angle of the adjustable blade is changed, the middle shaft rotates synchronously and transmits the rotating state to the angular displacement sensor. The angular displacement sensor measures the variable quantity of the angle of the adjustable blade, the variable quantity of the angle does not need to be transmitted through the adjusting mechanism, the influence of the abnormal working state of the adjusting mechanism is avoided, the intermediate shaft is directly connected with the adjustable blade and the angular displacement sensor and is directly limited by the adjustable blade and the angular displacement sensor, the working state is stable, and angle measurement is accurate.

Description

technical field [0001] The application belongs to the field of engine design, and in particular relates to an adjustable guide vane angle measuring mechanism for compensating for the deformation difference of a double-layer casing. Background technique [0002] Aero-turbine engines have several adjustable guide vanes, and the stable and reliable operation of the adjustment mechanism has a crucial impact on the operation, control and operation of the engine. The rigid design of the adjustment mechanism, the clearance fit and the expansion coordination of the inner and outer casings seriously restrict the adjustment, measurement and control accuracy of each adjustable guide vane. At present, the angle of each adjustable guide vane is usually transmitted multiple times by the adjustment mechanism, and is indirectly measured by the linear displacement sensor mounted on the actuator at the end of the transmission to realize the closed-loop control of the adjustment variable. [...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide an adjustable guide vane angle measurement mechanism that compensates for the deformation difference of the double-layer casing, so as to solve the problem caused by the abnormal operation of the adjustment mechanism due to the need for multiple transmissions of the adjustable vane angle signal in the prior art. The problem of measurement error

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