High-precision flow sensor
A flow sensor, high-precision technology, applied in the direction of measuring flow/mass flow, liquid/fluid solid measurement, instruments, etc., can solve the inconvenience of multi-channel hydraulic synchronization system application, inability to perform self-test and evaluation, single rotor flow valve structure, etc. problems, to achieve the effect of compact overall structure design, reliable test results, and improved work reliability
Inactive Publication Date: 2008-04-02
何荣志
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[0002] Hydraulic technology is increasingly developing towards integration and intelligence, so there is an urgent need for low-cost flow sensors suitable for high pressure and high precision in hydraulic systems, so as to be more widely used in hydraulic control technology, hydraulic system parameter detection, and intelligent fault diagnosis. , the current online hydraulic flow measurement means and measurement technology can not meet this requirement well
For example, the "photoelectric flow sensor" of the utility model patent CN90224409.4, although it uses a photoelectric flow sensor composed of a photoelectric detection element and a rotor mechanical structure, but because its patent uses a relatively simple impeller, the rotor There is a lot of back-mixing between the outlet and inlet of the flow valve, and the liquid discharge is not clean. Therefore, the measurement accuracy of this flow sensor is not high, and it is not suitable for use in high-pressure hydraulic systems.
Moreover, this kind of sensor is too simple, and there is only one detection unit. Once a failure occurs, it cannot be used. The structure of the rotor flow valve is also too simple, which is not convenient for application in multi-channel hydraulic synchronization systems or multi-flow ratio systems, let alone self-testing. evaluate, therefore, the need to develop high-performance flow sensors suitable for hydraulic systems
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0036]As shown in Figure 1, that is, Figure 1a-d, this kind of high-precision flow sensor includes a rotor flow valve and a detection element. The spool of the rotor flow valve described above adopts a gear meshing structure, a cycloidal rotor meshing structure, or a meshing rotor structure, thereby forming a flow sensor. The detection element adopts a photoelectric encoder, a magnetic encoder or a speed measuring motor. Among them, the rotor flow valve block A is the basic component and core component of the composite valve. It is a rotating mechanical device with an internal structure similar to a hydraulic motor. Its key component is a rotating part with one or more chambers built in. It refers to two or more chambers, and the controlled fluid cannot flow freely with each other. For the convenience of explaining the problem, this paper re...
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A high precision flow sensor comprises a rotor flow valve and a detecting element, wherein, a valve core of the rotor flow valve is synchronously connected with a shaft of the detecting element through a shaft. The invention is characterized in that the valve core of the rotor flow valve can adopt a gear engage type structure, a cycloid rotor type engaging structure, or an engage-locked rotor structure, thereby forming the flow sensor which has the advantages of little backmixing and high measurement precision, and is applicable to high pressure and high precision places.
Description
technical field [0001] The invention relates to a flow sensor used in the hydraulic field. Background technique [0002] Hydraulic technology is increasingly developing towards integration and intelligence, so there is an urgent need for low-cost flow sensors suitable for high pressure and high precision in hydraulic systems, so as to be more widely used in hydraulic control technology, hydraulic system parameter detection, and intelligent fault diagnosis. However, the current online hydraulic flow measurement means and measurement technology can not meet this requirement very well. For example, the "photoelectric flow sensor" of the utility model patent CN90224409.4, although it uses a photoelectric flow sensor composed of a photoelectric detection element and a rotor mechanical structure, but because its patent uses a relatively simple impeller, the rotor There is a lot of back mixing between the outlet and inlet of the flow valve, and the discharge is not clean. Therefor...
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IPC IPC(8): G01F1/56G01F1/66G01F15/00
Inventor 何荣志
Owner 何荣志