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Method and device for variable pressure difference measurement

The technology of a metering device and metering method is applied in the direction of detecting fluid flow by measuring pressure difference, volume/mass flow generated by mechanical effects, etc., which can solve the problems of insufficient reliability and achieve improved reliability, improved metering range, and expanded selection range effect

Active Publication Date: 2021-05-28
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the methods in the prior art cannot take into account the fuel metering device that improves the metering range, accuracy and response speed of fuel metering. At the same time, the prior art has specific requirements for the structure type of the oil source pump, and the reliability is still not high enough.

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  • Method and device for variable pressure difference measurement
  • Method and device for variable pressure difference measurement
  • Method and device for variable pressure difference measurement

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the method is applied to a variable pressure differential metering device, which includes a controller 1, a metering valve displacement sensor 2, a post-measurement pressure sensor 3, a pre-measurement pressure sensor 4, a temperature sensor 5, a first electro-hydraulic control Device 6 , second electro-hydraulic control device 7 , oil return valve displacement sensor 8 , metering valve 9 , and oil return valve 10 .

[0038] figure 2 A schematic flow chart of the variable pressure difference measurement method provided in Embodiment 1 of the present invention, as figure 2 As shown, the variable pressure difference measurement method includes:

[0039]Step 101: Obtain the status information of the metering device according to the metering valve displacement sensor 2, the post-metering pressure sensor 3, the pre-metering pressure sensor 4, the temperature sensor 5, and the oil return valve displacement sensor 8;

[0040] Step 102: Send the ...

Embodiment 2

[0053] image 3 Schematic diagram of the structure of the variable pressure differential metering device provided by the present invention. combine figure 1 and image 3 As shown, a variable pressure difference metering device provided by the present invention includes a controller 1, a metering valve displacement sensor 2, a pressure sensor 3 after metering, a pressure sensor 4 before metering, a temperature sensor 5, a first electro-hydraulic control device 6, The second electro-hydraulic control device 7, oil return valve displacement sensor 8, metering valve 9, oil return valve 10, wherein:

[0054] Metering valve displacement sensor 2, post-measurement pressure sensor 3, pre-measurement pressure sensor 4, temperature sensor 5, oil return valve displacement sensor 8, first electro-hydraulic control device 6, second electro-hydraulic control device 7 are connected with controller 1, Metering valve 9 and oil return valve 10 are connected.

[0055] Exemplarily, the first ...

Embodiment 3

[0062] combine figure 1 and image 3 As shown, another variable pressure difference metering device provided by the present invention, wherein the constant pressure valve 14 cooperates with the low pressure oil outlet 18 of the constant pressure valve to provide stable servo oil for the variable pressure difference metering device, reducing the impact of fuel pressure fluctuations on control accuracy The influence of fuel metering improves the accuracy of fuel metering.

[0063] The fuel pump provides fuel through the fuel inlet 15, and after being metered by the variable pressure difference metering device, the fuel outlet 16 provides accurately metered fuel to the combustion chamber of the engine.

[0064] The metering valve displacement sensor 2, the pressure sensor after metering 3, the pressure sensor before metering 4, the temperature sensor 5, and the oil return valve displacement sensor 8 will measure the pressure before and after the metering valve of the fuel meteri...

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Abstract

The embodiment of the present invention proposes a variable pressure difference metering method and device, based on the metering valve displacement sensor (2), the pressure sensor after metering (3), the pressure sensor before metering (4), the temperature sensor (5), the oil return The valve displacement sensor (8) obtains the state information of the metering device; sends the state information of the metering device to the controller (1); the controller (1) calculates the actual mass flow rate according to the state information of the metering device, receives the state signal of the controlled object and the Object expectation index information, the control signal is calculated by the preset algorithm; the first electro-hydraulic control device (6), the second electro-hydraulic control device (7), the metering valve (9), and the oil return valve (10) are controlled by the control signal ) in order to realize the regulation and control of fuel pressure difference and flow. It can be seen that the embodiments of the present invention take into account and improve the measurement range, precision and response speed of fuel metering by performing real-time control on multiple variables, and at the same time expand the selection range of fuel source pump types for fuel metering, and improve the reliability of the fuel metering device. sex.

Description

technical field [0001] The invention belongs to the field of fuel metering, in particular to the field of aviation engine fuel metering. Background technique [0002] At present, the design of fuel system of aero-engine usually adopts fuel metering structure with constant pressure difference. The pressure difference before and after the metering valve is maintained constant through the differential pressure valve and the oil return valve, so that the adjustment of the fuel flow by the metering device is only in a single value corresponding relationship with the flow area (position) of the metering valve. [0003] Among them, the fuel metering device is one of the important modules of the fuel system of the aero-engine. Its main task is to control the fuel flow into the engine and provide the required fuel according to the different working conditions of the engine. [0004] In the prior art, there are many methods for controlling the fuel flow of the engine, for example: th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/36
CPCG01F1/36
Inventor 王剑胡肖璐安理会彭尚军李旭肖红亮
Owner XIAN AERO ENGINE CONTROLS
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