Intelligent fuel oil pump with metering control function

Abstract

The invention discloses an intelligent fuel oil pump with a metering control function. The intelligent fuel oil pump comprises an intelligent control unit, a servo motor, a gear pump, a differential pressure scanning measuring device, a differential pressure sensor and an oil path selection control valve, wherein the differential pressure scanning measuring device is located at the outlet of the gear pump, a throttling opening with a proper flow area is gated according to the flow range, and relative high flow measurement sensitivity is achieved while the relative low differential pressure isguaranteed; the intelligent control unit converts the differential pressure into the real-time flow, and the rotating speed of the servo motor is controlled according to the deviation between the expected flow and the real-time flow, so that the required fuel oil amount is pumped out by the gear pump; and the oil path selection control valve is used for gating a main oil path and an auxiliary oilpath of a fuel oil nozzle, so that the oil supply requirement of less flow in the engine starting process is met. According to the intelligent fuel oil pump with the metering control function, the fuel oil can be supplied as needed, the intelligent fuel oil pump has the advantages of being high in metering precision, small in pressure loss, compact in structure and convenient and fast to use, andcan be conveniently used for fuel oil control of an aero-engine and a gas turbine.

Description

technical field [0001] The invention belongs to the field of aero-engine fuel control systems, and mainly relates to a fuel metering method based on an electric pump. Specifically, it is an electric pump with intelligent control function, which can output fuel with accurate flow rate in real time on demand, and is suitable for occasions that require precise fuel supply, such as fuel supply to the combustion chamber of aero-engines and gas turbines. Background technique [0002] Aeroengines and gas turbines burn fuel to generate heat to drive turbines to do work or eject high-speed airflow from tail nozzles to obtain thrust. Therefore, for aeroengines and gas turbines, the main means of control is by regulating the amount of fuel entering the fuel nozzles. The working state of the engine is different, and the amount of fuel required is also different. How to adjust the fuel quantity efficiently and accurately is the main problem in the control of aero-engines and gas turbin...

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Problems solved by technology

[0006] However, the throttling area of ​​this method proposed by the patent is fixed. When the fuel flow rate is small, there is a problem that the pressure difference is too small and difficult to measure. When the fuel flow rate is large, there is a problem of excessive pressure loss.

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