Читать книгу Fundamentals of designing hydraulic gear machines - Jarosław Stryczek - Страница 5

The concept of ‘hydraulic (fluid power) gear machines’ (HGM) refers to such a type of machines utilized in the fluid power drive and control systems, where gears constitute the basic system both in terms of the principle of design and of operation. HGM are employed to change mechanical energy into hydraulic energy or conversely. The former are pumps, and the latter – hydraulic motors.

The author has been dealing with HGM for over 40 years, first on his own, and for the last several years, with a group of collaborators within the Fluid Power Research Group who works at the Department of Fundamentals of Machine Design and Tribology at the Faculty of the Mechanical Engineering of Wroclaw University of Science and Technology. The original knowledge accumulated as a result of the author’s work has been ordered and coherently presented in this book. The knowledge has been put into a framework of the design process, and the book has been titled ‘Fundamentals of designing hydraulic gear machines’. The work contains both the theoretical knowledge (Chapters 1– 6 and 9–10) and the knowledge resulting from experimental research (Chapters 7– 8). Reading through the consecutive chapters of the book one finds out how to design various kinds and types of hydraulic gear machines. The validity and efficiency of such an approach is proved in the last, namely eleventh chapter of the book, in which various machines designed according to the principles specified in the book are presented. Some of the machines function as industrial products, and others, in a form of prototypes or models, are ready to be introduced in the industrial practice. The knowledge presented in this book can be used also in other areas of machine design. For instance, the contents of Chapter 3, concerning the cycloidal gearing, could be applied in the designing of the mechanical cycloidal transmissions. Similarly, the visualisation research methods utilized to study the phenomena and proc­ess occurring in the channels and clearances of the hydraulic gear machines presented in Chapter 7 could be applied for the research into other types of fluid power machines and appliances such as valves, directional valves, or even entire hydraulic systems. The author will be satisfied if his book grasps the readers’ interest and becomes useful in solving their professional problems.

The illustrations given in a form of design drawings, diagrams or curves play a significant role in the publication. For the preparation of those figures, the author would like to express his gratitude to Aleksander Czarny, a mechanical engineering technician, who has been an ardent member of the Fluid Power Research Group for many years.

My special thanks go to Piotr Storta, the translator of this book from Polish into English. A thorough analysis of the source text, searching for the right English terminology and the appropriate language form reflecting the author’s thoughts are his great merit.

The publication of the book is an opportunity to remember my father, Prof. Stefan Stryczek, the author of a recognised academic handbook ‘Napęd hydrostatyczny’ (‘Hydrostatic drive’) and the Dean of the Mechanical Engineering Faculty of Wroclaw University of Science and Technology, a scientist and engineer, who for a few decades had been a leader of the Polish fluid power engineers. I dedicate this book to his memory.

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