High-precision adjustable venturi tube based on grating ruler feedback
A Venturi tube and grating ruler technology, applied in the aerospace field, can solve the problem of insufficient adjustment accuracy
Active Publication Date: 2021-07-16
BEIHANG UNIV
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Problems solved by technology
[0004] The purpose of this application is to provide a high-precision adjustable venturi tube based on grating scale feedback, to a certain extent, to solve the existing technical problem of using a stepping motor to drive the valve stem, and its adjustment accuracy is not accurate enough
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[0047] The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0048] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a spec...
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The invention relates to the technical field of aerospace, in particular to a high-precision adjustable venturi tube based on grating ruler feedback, which comprises a venturi tube main body with a flow channel, an adjusting component, a driving component and a detection component in communication connection with the driving component, one end of the adjusting component is located in the flow channel, and a critical flow channel can be formed between the adjusting component and the flow channel; the other end of the adjusting component is connected with the driving component, and the driving component drives the adjusting component to move in the axis direction of the flow channel so as to change the sectional area of the critical flow channel; the detection component is connected with the adjusting component and can obtain displacement data of the adjusting component, and the detection component can reversely control movement of the driving component according to the displacement data. The detection component can obtain the displacement data of the adjusting component, and can reversely control the movement of the driving component according to the displacement data, so that the movement of the adjusting component can be more accurately controlled, the flow adjustment of the adjusting component is more accurate, and the adjustment error is reduced.
Description
technical field [0001] The present application relates to the field of aerospace technology, in particular to a high-precision adjustable venturi tube based on grating scale feedback. Background technique [0002] In order to achieve the effect of adjusting and controlling the flow rate, the existing adjustable cavitation venturi usually adopts the adjustment method of stepping motor and ball screw; specifically, the stepping motor is used to drive the valve stem, so as to regulate and control The effect of flow. However, due to a certain error in the stepping motor itself, there will also be a certain gap error in the ball screw, which will limit the displacement accuracy of the valve stem and eventually lead to inaccurate adjustment. [0003] Therefore, there is an urgent need for a high-precision adjustable Venturi tube based on grating ruler feedback, which can solve the shortcomings in the prior art to a certain extent. Contents of the invention [0004] The purpose...
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IPC IPC(8): G01F1/44G01F15/00G05D7/06
CPCG01F1/44G01F15/00G01F15/005G05D7/0617
Inventor 田辉张源俊谭广王中烁郭子豪
Owner BEIHANG UNIV