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Sensors 2014, 14(8), 15480-15495;

A High-Pressure Bi-Directional Cycloid Rotor Flowmeter

The State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
Author to whom correspondence should be addressed.
Received: 27 June 2014 / Revised: 5 August 2014 / Accepted: 6 August 2014 / Published: 21 August 2014
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [2496 KB, uploaded 21 August 2014]


The measurement of the flow rate of various liquids and gases is critical in industrial automation. Rotary positive displacement meters (rotary PD meters) are highly accurate flowmeters that are widely employed in engineering applications, especially in custody transfer operations and hydraulic control systems. This paper presents a high pressure rotary PD meter containing a pair of internal cycloid rotors. It has the advantages of concise structure, low pressure loss, high accuracy and low noise. The curve of the internal rotor is designed as an equidistant curtate epicycloid curve with the external rotor curve as its conjugate. The calculation method used to determine the displacement of the cycloid rotor flowmeter is discussed. A prototype was fabricated, and experiments were performed to confirm measurements over a flow range of 1–100 L/min with relative errors of less than ±0.5%. The pressure loss through the flowmeter was about 3 bar at a flow rate of 100 L/min. View Full-Text
Keywords: flow measurement; positive displacement meter; cycloid rotor flow measurement; positive displacement meter; cycloid rotor
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Liu, S.; Ding, F.; Ding, C.; Man, Z. A High-Pressure Bi-Directional Cycloid Rotor Flowmeter. Sensors 2014, 14, 15480-15495.

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