Design and adjusting method for fuel oil metering device starting flow characteristics
A technology of starting flow and metering device, which is applied to measurement devices, volume/mass flow generated by mechanical effects, relative volume flow measurement, etc., and can solve the problem of no effective starting flow characteristic design and adjustment method for fuel metering devices
Active Publication Date: 2015-06-17
AECC SHENYANG ENGINE RES INST
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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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[0060] This embodiment provides a method for designing and adjusting the start-up flow characteristics of a fuel metering device, which is characterized in that: the design and adjustment method for the start-up flow characteristics of the fuel metering device is divided into the following six steps:
[0061] 1) The fuel metering device adopts the constant pressure difference fuel flow metering method, and the metering valve adopts or partially adopts a rectangular oil control window, so that the starting flow characteristic is linear;
[0062] 2) Set a bypass adjustment element with adjustable flow area in parallel with the metering valve, so that the intercept of the starting flow characteristic can be adjusted;
[0063] 3) The fuel metering device is used as a standard part, and its parameters such as the pressure difference of the differential pressure valve or the differential pressure oil return valve, the initial position feedback value of the metering valve spool, the w...
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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 a fuel metering device for an aero-engine or ground gas turbine digital electronic control system, and in particular to a method for designing and adjusting the starting flow characteristics of a fuel metering device. Background technique [0002] In the digital electronic control system of aero-engine or ground gas turbine, the fuel metering device is the actuator of the control system, which is mainly used to realize the function of fuel flow metering. The start-up flow characteristic is the flow characteristic corresponding to the start-up stage of the fuel metering device and the aeroengine or ground gas turbine. The starting flow characteristics directly affect the starting effect of aero-engines or ground gas turbines. Therefore, fine adjustments should be made so that the fuel metering devices of the same type produced in batches have consistent starting flow characteristics to ensure...
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IPC IPC(8): G01F9/00G01F1/36
Inventor 左伟崔利丰金鑫张东江盛荣芹芳毛晓奇朱传龙杨柳曾强吴新栾东李军
Owner AECC SHENYANG ENGINE RES INST