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High-precision flow metering mechanism

A flow measurement, high-precision technology, applied in the direction of relative volume flow measurement, liquid/fluid solid measurement, measuring devices, etc., can solve the problem of large axial size of linear displacement sensor, general measurement repeatability accuracy, and axial requirements of valve core. Problems such as large space size, to achieve the effect of high-precision fuel metering function, reduced volume, and compact mechanism rhythm

Active Publication Date: 2019-04-02
XIAN AERO ENGINE CONTROLS
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AI Technical Summary

Problems solved by technology

This form of metering valve assembly can only use a linear displacement sensor to transmit the position signal of the spool to the electronic controller, and the axial dimension of the linear displacement sensor is relatively large, so that the space required for the axial direction of the spool is relatively large. Measuring repeatability accuracy is average during reciprocating motion

Method used

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Embodiment Construction

[0019] Such as Figure 2-4 , a high-precision flow metering mechanism, including a valve core, a bushing, a housing, and an angular displacement measurement assembly; the angular displacement measurement assembly includes a first sector gear, a second sector gear, a spring, an angular displacement sensor, and a rotating shaft; the valve The core, bushing and angular displacement measurement components are all set in the housing,

[0020] One of the first sector gear and the second sector gear is rotatably mounted on the shaft, and the other of the first sector gear and the second sector gear rotates integrally with the shaft; the angular displacement sensor measures the rotation angle of the shaft; A spring is arranged between the first sector gear and the second sector gear;

[0021] The bushing has an opening, and the part of the spool corresponding to the opening is formed with a rack; both the first sector gear and the second sector gear are engaged with the rack; the spr...

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Abstract

The invention relates to a high-precision flow metering mechanism, and belongs to a fuel metering device of a fuel control system. The mechanism comprises a valve element, a bushing, a housing and anangular displacement measuring assembly. The angular displacement measuring assembly comprises a first sector gear, a second sector gear, a spring, an angular displacement sensor and a rotating shaft.According to the high-precision flow metering mechanism, the axial position size of a metering valve assembly can be maximally improved, position signals of the valve element can be transmitted withhigh precision, and meanwhile the angular displacement sensor can be used as a sensing element for receiving and transmitting the position signals of the valve element.

Description

technical field [0001] The invention belongs to a fuel oil metering device of a fuel oil control system, in particular to a high-precision flow metering mechanism. Background technique [0002] In the fuel control system, the fuel metering mechanism includes a valve core, a valve sleeve, and a linear displacement sensor. The linear displacement sensor is generally installed at one end of the spool, moves axially with the spool, senses the position signal of the spool and feeds it back to the electronic controller. [0003] figure 1 Shown is a fuel metering mechanism equipped with a linear displacement sensor in an existing mature product. The working principle is that the valve sleeve is fixed in the housing, the valve core moves axially in the valve sleeve, and the fuel flow through the window is controlled by changing the opening of the metering window; the linear displacement sensor is fixed at one end of the valve core, when the valve core moves , the linear displacem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F9/00
CPCG01F9/006
Inventor 王倡丽
Owner XIAN AERO ENGINE CONTROLS
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