The working characteristic of scroll oil pump and the propeny of medium oil are described in this paper, the leakage of oil IS analysed, and the mathemaucal model is set up for scroll o1l pump. The effects of the discharge port on the pressure of the working pocket, the oil d1splaccment and the requ1red power are obtained according to the results of calculation and e>;periment. The optimal desi...

AND CONCLUSIONS Chemical Mechanical Planarization (CMP) must continuously improve to meet the stringent requirements of next generation IC device manufacturing. Precision flow control of CMP slurry is critical to achieving a repeatable planarization process, minimizing slurry waste, and reducing cost-of-ownership (CoO). Monitoring and controlling slurry large particle concentration through filt...

The centrifugal pump is one of the most important pieces energy-consuming equipment in various hydraulic engineering applications. This paper takes a low specific speed as research object. Based on method combining numerical calculation and experimental verification, influence gap drainage structure performance its internal flow field distribution were investigated. inside impeller under differ...

• The close anatomical relationship between the two ventricles of the heart implies some kind of functional effect upon each other. This effect could be manifested in at least two different ways. An indirect "hemodynamic" effect could be exercised by one ventricle upon the other, because differences in the output of the one ventricle may affect the input to the other ventricle. A direct or "mec...

BACKGROUND Complications of intrathecal baclofen (ITB) pump implantation for treatment of pediatric patients with spasticity and dystonia associated with cerebral palsy remain unacceptably high. To address the concern that some patients may have underlying arrested hydrocephalus, which is difficult to detect clinically because of a low baseline level of neurological function, and may contribute...

A heat pump system requires proper refrigerant charge amount. Once refrigerant is charged into a heat pump system, its charge amount is fixed. For this reason, prediction of optimal refrigerant charge amount is very important in order to yield best performance. Too low charge amount degrades capacity of heat pump. On the other hand, excessive charge amount decreases coefficient of performance (...

The Center for Transportation Research (CTR) Vehicle Systems team modified a Nissan CK-2 Continuously Variable Transmission (CVT) for a diesel hybrid powertrain application. Mechanical and electrical modifications were made to the CVT, both internal and external to the transmission. The goal of this experiment was to investigate and demonstrate the potential of CVT for diesel engines hybrid ele...

Tubing circuits primed with water were constructed on two roller pumps to characterize and compare two static methods of setting the occlusion on roller pumps (fluid drop rate and pressure drop rate). Twelve separate experiments were performed in which PVC boot tubing diameters (1/2 in, 3/8 in and 1/4 in), roller position (each roller alone on a two roller pump) and roller occlusion (total occl...