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Variable pressure difference measuring method and device

A technology of metering device and metering method, which is applied in the direction of detecting fluid flow by measuring pressure difference, volume/mass flow generated by mechanical effect, etc., and can solve problems such as insufficient reliability

Active Publication Date: 2019-03-22
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.

Method used

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  • Variable pressure difference measuring method and device

Examples

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Embodiment 1

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

[0038] figure 2 It is a schematic flow chart of the variable pressure difference measurement method provided in the first embodiment of the present invention, such as figure 2 As shown, variable pressure difference measurement methods include:

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

[00...

Embodiment 2

[0053] image 3 It is a schematic structural diagram of a variable pressure difference metering device provided by the present invention. Combine figure 1 with image 3 As shown, a variable differential pressure 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, the oil return valve displacement sensor 8, the metering valve 9, and the oil return valve 10, of which:

[0054] Metering valve displacement sensor 2, pressure sensor 3 after metering, pressure sensor 4 before metering, temperature sensor 5, oil return valve displacement sensor 8, first electro-hydraulic control device 6, second electro-hydraulic control device 7 and controller 1, respectively The metering valve 9 and the oil return valve 10 are connected.

[0055] Exempla...

Embodiment 3

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

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

[0064] Metering valve displacement sensor 2, pressure sensor after metering 3, pressure sensor before metering 4, temperature sensor 5, oil return valve displacement sensor 8 The fuel metering device measures the pressure before and after the valve, metered fuel temperature and metering, and the opening of the re...

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Abstract

The embodiment of the invention discloses a variable pressure difference measuring method and device. The method comprises acquiring the state information of a measuring device according to a measuring valve displacement sensor (2), a post-measurement pressure sensor (3), a pre-measurement pressure sensor (4), a temperature sensor (5) and an oil return valve displacement sensor (8); transmitting the state information of the measuring device to a controller (1); in the controller (1), calculating actual mass flow according to the state information of the variable pressure difference measuring device, receiving state signals and expected index information of a controlled object, and calculating control signals through a preset algorithm; controlling the opening degree of a first electro-hydraulic control device (6), a second electro-hydraulic control device (7), a measuring valve (9) and an oil return valve (10) through the control signals to achieve fuel pressure difference and flow adjustment control. By in real time controlling multiple variables, the variable pressure difference measuring method integrates and increases fuel measuring range and precision and response speed simultaneously, and meanwhile, expands the selecting range of varieties of fuel measuring fuel source pumps and improves reliability of the fuel measuring device.

Description

Technical field [0001] The invention belongs to the field of fuel measurement, and specifically relates to the field of aviation engine fuel measurement. Background technique [0002] At present, the design of aero engine fuel system usually adopts a fuel metering structure with a constant pressure difference. The differential pressure valve and the fuel return valve jointly maintain a constant pressure difference before and after the metering valve, so that the fuel flow adjustment of the metering device is only in a single-valued 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 aviation engine fuel system. Its main task is to control the fuel flow into the engine and provide the required fuel according to the different operating conditions of the engine. [0004] In the prior art, there are many methods to control the fuel flow of the engine. For example, the fuel flow adjustment ...

Claims

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Application Information

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Patent Type & Authority Applications(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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