Abstract
A novel centrifugal pump with axial directional inlet and outlet flow was presented. The system fluid was employed as the lubricant for the hydrodynamic bearings by which the pump can operate at the maximum speed of 8100 r/min without oil lubrication or rigid support. The performance curves related to the efficiency, head, and volume flow rate were obtained via a water cycle test rig. The efficiency at best efficiency point reached 36.14% with a volume flow rate of 4.13 m3/h and a head of 27.34 m at 7800 r/min. The maximum head reached 37.28 m, with a volume flow rate of 0.568 m3/h at 7800 r/min. The maximum volume flow rate of 6.05 m3/h was obtained with a head of 19.45 m at 8100 r/min. Then, the three-dimension computational fluid dynamics model with Reynolds-averaged Navier–Stokes equations and shear stress transport k- ω turbulence model for the pump and bearings was set up individually. The numerical results agreed well with the experimental data.
Highlights
Thanks to their high single-stage head, compact structure, convenient maintenance, and reliable performance, high-speed centrifugal pumps are widely used in aerospace, petroleum, and chemical fields.[1]
The behavior of the present high-speed oil-free pump is in agreement with that of a general centrifugal pump
A novel high-speed oil-free centrifugal pump supported by liquid-lubricated hydrodynamic bearings was proposed in this study
Summary
Thanks to their high single-stage head, compact structure, convenient maintenance, and reliable performance, high-speed centrifugal pumps are widely used in aerospace, petroleum, and chemical fields.[1]. The hydrodynamic bearings with different installation methods were applied in different types of blood pumps, such as those with upper and lower spiral grooves structure,[25,26,27] and hydrodynamically levitating impellers.[28] The artificial blood pump with hydrodynamic bearings was typical designed for achieving a head of 80 mm Hg at a flow rate of 5 L/min. It is mainly composed of the inlet cover plate, inducer, impeller, guide vane, DC motor stator, shaft with inlaid permanent magnets, hydrodynamic bearings, outlet volute, and shell. For the same inlet and outlet pipeline, velocity, and horizontal position, the total head of the pump can be calculated by equation (18). The test head was 17.25, 20.33, 24.43, 26.54, 29.73, and 31.93 m at the flow rate from the same working conditions
Sign-in/Register to view highlights & summary 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.
