Abstract — This paper proposed a sequential diagnosis method using fuzzy neural network called “partially-linearized neural network (PNN)”, by which the fault types of rotating machinery can be precisely and effectively distinguished at an early stage on the basis of the possibilities of symptom parameters. The non-dimensional symptom parameters (NPS) in time domain are defined for reflecting t...

We have explored the potential advantages of a low prime closed-circuit cardiopulmonary bypass (CPB) system using a non-human primate model. Although manufacturers have reduced priming volumes in individual CPB components, the standard circuit volume remains high because of the tubing diameter and length necessary for gravity drainage. By replacing gravity drainage with the negative pressure g...

This paper presents a fault diagnosis method for a centrifugal pump system with frequency-domain symptom parameters by using the wavelet transform, rough sets and a fuzzy neural network to detect faults and distinguish fault types at an early stage. The wavelet transform is used for feature extraction across an optimum frequency region. The diagnosis knowledge for the training of neural network...

The interaction between the rotor and stator is a major source of high amplitude pressure fluctuation flow-induced vibration in multistage centrifugal pumps. detrimental to reliable operation sensitivity severe if number stages more. In present experimental study, vertical submersible pump used measure level at Best Efficiency Points (BEP) determine influence stage operating speed on fluctuatio...

Since centrifugal pumps consume a mammoth amount of energy in various industrial applications, their design and optimization are highly relevant to saving maximum increasing the system’s efficiency. In current investigation, pump has been designed optimized. The study carried out for specific application transportation slurry at flow rate 120 m3/hr head 20 m. For process, multi-objective geneti...

The management of a population of centrifugal pumps in the petrochemical industry can be daunting. A popular method for strategically optimizing the maintenance and operation of these centrifugal pumps is to measure the reliability of the whole pump population in terms of Mean-Time-Between-Failures (MTBF). Too often MTBF improvement becomes the focus rather than a means of supporting the actual...

The paper has established sixteen design schemes for super-low specific speed centrifugal pump compound impeller with orthogonal method, based on the main factors impacting the design of compound impeller, like short blades number of compound impeller, the relative position of blade radial inlet, blade circumferential bias degree, deflection angle, etc.,. By numerical simulation, the optimal de...