Abstract
A new type of crank-motor actuator was used to improve the vibrating flow pump (VFP). The linear-motor actuator has the advantage of a flexible driving frequency and driving stroke, but it makes the total system heavy due to its low driving force within the target frequency (∼10-40 Hz). The crank-motor structure has an advantage in that it enables an effective driving force within the target frequency, but it has a linear relationship between driving frequency and pumping output because of the fixed stroke of the crank. This linear relationship restricts the driving conditions. The newly designed crank-motor VFP is developed as a left ventricular assist system. It's driving condition was scheduled as 100 mm Hg/5 L min-1/∼20-25 Hz. A study determined that a driving stroke of 5 mm and a diameter of 10 mm were needed to drive the vibrating central tube. The trial crank-motor VFP was made to these specifications. The new VFP is 100 × 50 × 72 mm (L × W × H) and weighs 320 g. This pump almost satisfied the required pumping performance for left ventricular assistance. The new type crank-motor VFP may become a good pump with careful revision of its design and may be used in experiments for the studies of oscillated blood flow and impedance of the circulatory system.
Original language | English |
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Pages (from-to) | 351-353 |
Number of pages | 3 |
Journal | Journal of Congestive Heart Failure and Circulatory Support |
Volume | 1 |
Issue number | 4 |
Publication status | Published - 2000 |
Externally published | Yes |
Keywords
- Crank-motor actuator
- Left ventricular assistance
- Oscillated blood flow
- Vibrating flow pump
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Cardiology and Cardiovascular Medicine