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Analysis of pulsation of the sliding-vane pump for selected settings of hydrostatic system

Klarecki K., Rabsztyn D., Hetmanczyk M. P.

Eksploatacja i Niezawodność

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2015

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Vol. 17, no. 3

338--344

EN

Sliding-vane pumps are widely used as sources of the flow in hydrostatic power transmission systems. A noticeable tendency in hydrostatic systems is revealed in the form of minimization of the mass, overall dimensions and at the same time increasing of a power density delivered by pumps. The article presents the preliminary results of the studies related to a pressure pulsation of the hydraulic system equipped with the sliding-vane pump (T7BS type manufactured by Parker & Denison Company). During the studies the pressure pulsation in selected places of pressure line were recorded. A series of measurements were performed for selected settings of the system. The recorded characteristics were analysed in time and frequency domains.

PL

Pompy łopatkowe należą do często używanych generatorów strugi cieczy roboczej w napędach hydrostatycznych. Zauważalną tendencją w opisywanych układach jest minimalizacja masy oraz wymiarów gabarytowych, przy jednoczesnym zwiększaniu gęstości mocy oferowanej przez pompę. W artykule przedstawiono wyniki wstępnych badań hydraulicznego napędu hydrostatycznego z pompą typu T7BS firmy Parker & Denison. Podczas badań zarejestrowano wartości pulsacji ciśnienia w wybranych miejscach linii tłocznej. Cykl pomiarów przeprowadzono w odniesieniu do wybranych nastaw pracy układu. Uzyskane przebiegi zostały przeanalizowane w dziedzinach czasu oraz częstotliwości.

2

Programme of Research Development of Mechatronic Drive Systems

Świder J., Cholewa A., Hetmanczyk M. P.

Machine Dynamics Research

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2014

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Vol. 38, No. 3

43-49

EN

The growing demands of the complexity of industrial systems require knowledge of advanced issues covered of mechatronics domain. On the other hand, is noticeable a need to adjust programs of specialized educational programmes to rapidly changing requirements of labor market. The article presents new trends in the field of education covering the scope of mechatronic drive systems. The authors specified leading trends in the development of diagnosis and prognosis of mechatronic drive states that have been realized in the Laboratory of Mechatronics Drive Applications. Particular attention was paid to the issues of energy savings and modem systems of exchange of information between distributed drives, using a Fieldbus and wireless networks.

3

Influence of the Dynamics of Electrohydraulic Proportional Valves on the Selected Parameters of Servo Drives

Klarecki K., Rabsztyn D., Hetmanczyk M. P.

Machine Dynamics Research

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2014

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Vol. 38, No. 3

51-60

EN

The paper presents a comparison of the accuracy of the positioning servo hydraulic proportional valves belonging to different classes (with improved dynamic performance and the typical proportional valve) in the case of selected kinematic parameters and external load conditions. In the tested hydraulic servo drive, the Compax3F controller by Parker Hannifin was used. The authors described also the procedure of analytical selection of the adjustments for the proportional regulators and the applicability of specificied types of servo hydraulic proportional valves in applications requiring of various positioning accuracy. As the quality factors of the analyzed parameters the maximum control deviation values and Peak to Peak control deviation values have been used.