Piotr Osiński

The Influence of Gear Micropump Body Asymmetry On Stress Distribution

Abstract The paper presents the results of numerical calculations of stress distributions in the gear micropump body for applications in hydraulic systems, especially in the marine sector. The scope of the study was to determine the most favorable position of bushings and pumping unit in the gear pump body in terms of stress and displacement distribution in the pump housing. Fourteen cases of gear pump bushings and pumping unit locations were analyzed: starting from the symmetrical position relative to the central axis of the pump, up to a position shifted by 2.6 mm towards the suction channel of the pump. The analysis of the obtained calculation results has shown that the most favorable conditions for pump operation are met when the bushings are shifted by 2.2 mm towards the suction channel. In this case the maximal stress was equal to 109 MPa, while the highest displacement was about 15μm. Strength and stiffness criteria in the modernized pump body were satisfied.

Identification of Influence of Part Tolerances of 3PWR-SE Pump On Its Total Efficiency Taking Into Consideration Multi-Valued Logic Trees

Abstract This paper presents the way of identifying the influence of the tolerance of model pumps (TYPE 3PWR-SE) construction on the total efficiency. The identification of sensitive control dimensions (Value/Tolerance) of examined pumps has been made by means of the multi-valued logic and inductive decision trees. In order to confirm the obtained results, multiple-valued logic trees have been used in the paper according to algorithms for the minimization of individual logic functions. What is more, a specific monotonicity of values of the most key parameters has been determined for the investigated set of pumps having individual specification numbers.

The Optimization of Three-Involute Tooth Outline with Taking into Consideration Multi-valued Logic Trees

The paper presents the application of multivalent logic trees with weighting factors in optimizing the three-involute tooth profile. The elaborated concept of the pump of the poly-involute outline sets new directions of development, and thus the applications of gear units. The process of optimization has been carried out with regard to the five basic criteria. Based on our calculations designed a whole range of gear for the involute

The didactic and scientific research capabilities of the Laboratory of Hydraulic Drives & Vibroacoustics of Machines

The didactic and scientific research capabilities of the Laboratory of Hydraulic Drives & Vibroacoustics of Machines