Design and adjusting method for fuel oil metering device starting flow characteristics

Abstract

Disclosed is a design and adjusting method for fuel oil metering device starting flow characteristics. The design and adjusting method for the fuel oil metering device starting flow characteristics includes the following six steps: 1) a valve adopting a rectangular fuel window is calculated by adopting a constant pressure difference fuel oil metering flow metering method so that the starting flow characteristics are linear; 2) a bypass adjusting element is arranged so that an intercept of the starting flow characteristics can be adjusted; 3) a fuel oil metering device is used as a standard part, the parameters such as pressure intensity difference of differential pressure valves or differential pressure fuel oil return valves, a metering valve core initial position feedback value, metering valve oil fuel control window width and bypass adjusting element circulation area are respectively in the middle range of design allowable errors; 4) the installation position of a metering valve core displacement sensor is adjusted; 5) a rake ratio of an adjusted product starting flow characteristics are enabled to be equal to that of the standard part; 6) the intercept of the adjusted product starting flow characteristics can be equal to that of the standard part. The design and adjusting method for the fuel oil metering device starting flow characteristics has the advantages that uniformity of the starting flow characteristics can be greatly improved, and good interchangeability of the fuel oil metering device can be ensured.

Description

Technical field [0001] The invention relates to the field of design and debugging of fuel metering devices for digital electronic control systems of aviation engines or ground gas engines, and in particular to a method for designing and adjusting the starting flow characteristics of fuel metering devices. Background technique [0002] In the digital electronic control system of aeroengine or ground gas engine, the fuel metering device is the actuator of the control system, mainly used to realize the fuel flow metering function. The starting flow characteristic is the flow characteristic of the fuel metering device corresponding to the starting phase of the aero engine or ground gas engine. The starting flow characteristics directly affect the starting effect of aero engines or ground gas turbines, so fine adjustments should be made to make mass-produced fuel metering devices of the same type have consistent starting flow characteristics to ensure the interchangeability of fuel me...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the fuel metering device has no effective starting flow characteristic design and adjustment method in the digital electronic control system of the aero-engine or the ground gas turbine, and specially provides a design and adjustment of the starting flow characteristic of the fuel metering device method

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