Andrzej Korczak

Static calculation of the rotor unloading automatic machine for a high-pressure centrifugal pump

The article presents static calculation of an automatic machine for unloading of rotor axial forces in a high-pressure and high-speed pump. Analysis of the rotor displacement influence to values of mass flow rate and pressure in the unloading chamber of the unloading system is given. The main geometric parameters of the system are obtained.

Mining Submersible Pump - Design, Characteristics and Protections

This paper presents new construction of a submersible pump which is highly efficient due to the new solutions for flow channels. It includes the results of laboratory tests of the pump of the new construction. It also presents the results of numerical calculations of liquid’s movement in the flow channels of the pump, comparison of computing characteristics and characteristics measured in the laboratory.and an analysis of the essential parameters of the pump’s work which transgression could become a danger for the pump. In case of the danger the security system turns off the engine temporally or permanently.

Dynamics of the Interaction between Human Circulatory System and Centrifugal Pump as a Left Ventricle Assist Device

Mathematical modeling of the complex process in the human cardiovascular system is powerful tool to evaluate the dynamic system response for the parameters change. Widely used continuous flow pumps (Left Ventricle Assist Device - LVAD) interacting with the circulatory system and work parameters of the assist device are changing dynamically. Different parameters of the system affect the pump operating conditions and on the contrary. Mathematical modeling of interaction between the cardiovascular system and mechanical assist device allows to identify the dangerous effects in the pump and system operation, and to eliminate such situations in the practical using of such pumps.

The Centrifugal Pump with the Impeller Supported in Sealing Clearances

The paper presents the construction of single-staged centrifugal pump with the impeller supported in longitudinal and transversal sealing clearances. In the state of equilibrium the impeller is supported by axial and radial forces and moments of pressure, which occur on both sides of the impeller in annular clearances. In the result the impeller adopts optimal non-contact position in which all the external forces that works on this are in balance. A description of the statics and the dynamics of the impeller has been presented.