Vortex flowmeter with piezoelectric sensor and flow detection method thereof

Abstract

The invention provides a vortex flowmeter provided with a piezoelectric sensor and a flow detection method of the vortex flowmeter. The vortex flowmeter comprises a valve pipe, a rotating shaft arranged on the valve pipe, an impeller arranged on the rotating shaft, an electromagnetic induction assembly arranged on the valve pipe, a displayer arranged on the valve pipe and a fixing device arranged on the valve pipe. The fixing device comprises a fixing sleeve arranged on the valve pipe, a rotating bearing arranged at the end of the rotating shaft, a fixing ring arranged at the end of the rotating shaft, an abutting piece movably arranged on the outer side of the fixing sleeve, a driving device arranged on the fixing sleeve, an abutting ball arranged on the fixing sleeve and a sliding ball arranged at the end of the rotating shaft. Wherein both the abutting ball and the sliding ball can slide, both the abutting ball and the abutting piece are associated with a driving device, and the driving device can drive the abutting ball and the abutting piece to move in different directions.

Description

technical field [0001] The invention belongs to the field of flow measurement equipment, and in particular relates to a turbine flowmeter and a set for measuring at least one flow characteristic. Background technique [0002] During the use of the turbine flowmeter, the smaller the contact area between the rotating shaft and the part in contact with the rotating shaft, the smaller the friction and the higher the sensitivity. In the existing fixing schemes, the bearings are used for cooperation. The sensitivity of the vortex flowmeter has a huge relationship with the friction force during the rotation of the shaft. The higher the friction force, the lower the sensitivity of the vortex flowmeter, which can measure The accuracy of the result is smaller; and in the existing flowmeter, the way of bearing cooperation is used, which will lead to high rotational friction and affect the accuracy. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the i...

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Problems solved by technology

In the existing fixing schemes, the bearings are used for cooperation. The sensitivity of the vortex flowmeter has a huge relationship with the friction force during the rotation of the shaft. The higher the friction force, the lower the sensitivity of the vortex flowmeter, which can measure The accuracy of the result is smaller; and in the existing flowmeter, the way of bearing cooperation will lead to high rotational friction, which will affect the accuracy.

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