Abstract
Flowmeters play a critical role in hydraulic systems. Following a review of positive displacement flowmeters, we hereby introduce a novel positive displacement flowmeter with parallel two-dimensional pistons as metering units. The working principle involves simultaneously utilizing both the rotational and reciprocation movements of a two-dimensional piston and paralleling two two-dimensional pistons to prevent flow rate fluctuations. Consequently, we established a mathematical model to describe the cam track curves and the displacement of the flowmeter. Meanwhile, the pressure loss is analyzed and the leakage flow rate is estimated to compensate the relative error. Finally, we designed and fabricated a prototype to measure the flow rate with ranges of 1 – 25 L/min. The experimental results show that the prototype has a reading uncertainty of less than 2%, a linearity of around ±3.8% and relative errors of less than ±2.9%. The pressure loss for the prototype increases linearly with the total flow rate and reaches 3 bar at 25 L/min. These characteristics are acceptable considering that this prototype is the first set of two-dimensional piston flowmeters. The shortcomings of this first-generation flowmeter are discussed in the conclusion part to provide guidance to enhance the performance of next-generation prototypes.
Highlights
Flowmeters are some of the most important instruments both in industrial and scientific applications, because flow rate is a nonnegligible parameter that requires measurement with high accuracy
Leakage flow rate exists because of the clearance between the moving and fixed parts and the pressure difference distributed before and after the clearance. One advantage of this flowmeter is that the two-dimensional piston has face sealings instead of the line sealings found in the traditional flowmeters
ON FURTHER RESEARCH A novel positive displacement flowmeter with parallel twodimensional pistons as metering units was presented in this paper
Summary
Flowmeters are some of the most important instruments both in industrial and scientific applications, because flow rate is a nonnegligible parameter that requires measurement with high accuracy. GENERAL STRUCTURE The architecture of a parallel two-dimensional pistons flowmeter is shown, where the critical components and working spaces are sited It has two sets of metering units. According to the working principle, the pistons reciprocate twice per rotation and the fluid flows through two pistons alternatively follows the rhythm of pistons’ motions. By combining Eqs. 9, 11, 13, and 15, an analytical model can be established for pressure distribution in the flowmeter, and its analytical solutions demonstrate the pressure loss due to throttle loss and hydraulic resistances
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
