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Author: Samuel Kärnell
Publisher: Linköping University Electronic Press
ISBN: 9179298303
Category :
Languages : en
Pages : 92
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Book Description
More and more vehicles are being electrified. Mobile working machines and heavy trucks are not excluded, and these machines are often hydraulically intense. Electrification entails new requirements for the hydraulic system and its components, and these requirements must be taken into consideration. Hydraulic systems have looked similar for a long time, but now there is an opportunity to advance. Many things change when a diesel engine is replaced with an electric motor. For example, variable-speed control becomes more relevant, electric regeneration becomes possible, and the use of multiple prime movers becomes an attractive alternative. The noise from the hydraulic system will also be more noticeable when the diesel engine is gone. Furthermore, the introduction of batteries to the system makes the energy more valuable, since batteries are heavy and costly compared to a diesel tank. Therefore, it is commercially viable to invest in the hydraulic system. This thesis revolves around the heart of the hydraulic system, that also is the root of all evil. That is the pump. Traditionally, a pump has had either a fixed displacement or a continuously variable displacement. Here, the focus is on something in between, namely a pump with discrete displacement. The idea of discrete displacement is far from unique, but has not been investigated in detail in combination with variable speed before. In this thesis, a novel design for a quiet pump with discrete displacement is presented and analysed. The results show that discrete displacement is relevant from an energy perspective for machines working extensively at high pressure levels and with low flow rates, and that a few discrete values are enough to make a significant difference. However, for other cycles, the possible energy gains are very limited, but the discrete displacement can be a valuable feature if downsizing the electric machine is of interest.
Author: Samuel Kärnell
Publisher: Linköping University Electronic Press
ISBN: 9179298303
Category :
Languages : en
Pages : 92
Get Book Here
Book Description
More and more vehicles are being electrified. Mobile working machines and heavy trucks are not excluded, and these machines are often hydraulically intense. Electrification entails new requirements for the hydraulic system and its components, and these requirements must be taken into consideration. Hydraulic systems have looked similar for a long time, but now there is an opportunity to advance. Many things change when a diesel engine is replaced with an electric motor. For example, variable-speed control becomes more relevant, electric regeneration becomes possible, and the use of multiple prime movers becomes an attractive alternative. The noise from the hydraulic system will also be more noticeable when the diesel engine is gone. Furthermore, the introduction of batteries to the system makes the energy more valuable, since batteries are heavy and costly compared to a diesel tank. Therefore, it is commercially viable to invest in the hydraulic system. This thesis revolves around the heart of the hydraulic system, that also is the root of all evil. That is the pump. Traditionally, a pump has had either a fixed displacement or a continuously variable displacement. Here, the focus is on something in between, namely a pump with discrete displacement. The idea of discrete displacement is far from unique, but has not been investigated in detail in combination with variable speed before. In this thesis, a novel design for a quiet pump with discrete displacement is presented and analysed. The results show that discrete displacement is relevant from an energy perspective for machines working extensively at high pressure levels and with low flow rates, and that a few discrete values are enough to make a significant difference. However, for other cycles, the possible energy gains are very limited, but the discrete displacement can be a valuable feature if downsizing the electric machine is of interest.
Author: P.K. Guha
Publisher: Dog Ear Publishing
ISBN: 1457555816
Category : Reference
Languages : en
Pages : 224
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Book Description
The global hydraulic (Fluid Power) product market is booming. It is a multi billion dollar industry spanning all across the world. There is hardly any industry, where fluid power application does not exist. Each and every application has a Pump involved and many cases a hydraulic motor too. Therefore, the global field population of Hydraulic Pumps and Motors is enormous. There are numerous Hydraulic Pump and Motor manufacturers in the world, in all the continents. The significant of them has been mentioned in this book. United States of America is the largest producer of hydraulic Pumps and Motors. The Fluid power industry involves millions of Jobs across the Globe. User base market for hydraulic pumps and motors are almost unlimited. Vocational and engineering schools barely mention Fluid Power application and usage of hydraulic pumps and motors. This book is designed to help the engineering schools to baptize their students with hydraulic Pumps and Motors and the industry as a whole. The book will put in touch the students with the actual pump and motor and their many applications. For those who are in Fluid Power industry, the book will provide variety of applications where hydraulic pumps and motors are profusely used.
Author: Steve Skinner
Publisher: Lulu.com
ISBN: 1291676899
Category : Technology & Engineering
Languages : en
Pages : 138
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Book Description
A light-hearted ramble through the history of hydraulic fluid power from its birth at the end of the 18th century up to the modern day. The book includes numerous illustrations, including the first hydraulic excavator and the virtual reality ship which could accommodate 700 passengers.
Author: Jarosław Stryczek
Publisher: Springer Nature
ISBN: 3030595099
Category : Technology & Engineering
Languages : en
Pages : 459
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Book Description
This book reports on cutting-edge research and technical achievements in the field of hydraulic drives. The chapters, selected from contributions presented at the International Scientific-Technical Conference on Hydraulic and Pneumatic Drives and Controls, NSHP 2020, held on October 21-23, 2020, in Trzebieszowice, Poland, cover a wide range of topics such as theoretical advances in fluid technology, work machines in mining, construction, marine and manufacturing industry, and practical issues relating to the application and operation of hydraulic drives. Further topics include: safety and environmental issues associated with the use of machines with hydraulic drive, and new materials in design of hydraulic components. A special emphasis is given to new solutions for hydraulic components and systems as well as to the identification of phenomena and processes occurring during the operation of hydraulic and pneumatic systems.
Author: Ifps
Publisher:
ISBN: 9780578588452
Category :
Languages : en
Pages :
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Book Description
Reference book
Author: Arun K. Saha
Publisher: Springer
ISBN: 8132227433
Category : Technology & Engineering
Languages : en
Pages : 1638
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Book Description
This volume comprises the proceedings of the 42nd National and 5th International Conference on Fluid Mechanics and Fluid Power held at IIT Kanpur in December, 2014.The conference proceedings encapsulate the best deliberations held during the conference. The diversity of participation in the conference, from academia, industry and research laboratories reflects in the articles appearing in the volume. This contributed volume has articles from authors who have participated in the conference on thematic areas such as Fundamental Issues and Perspectives in Fluid Mechanics; Measurement Techniques and Instrumentation; Computational Fluid Dynamics; Instability, Transition and Turbulence; Turbomachinery; Multiphase Flows; Fluid‐Structure Interaction and Flow‐Induced Noise; Microfluidics; Bio‐inspired Fluid Mechanics; Internal Combustion Engines and Gas Turbines; and Specialized Topics. The contents of this volume will prove useful to researchers from industry and academia alike.
Author: Walter Grassi
Publisher: Springer
ISBN: 3319621998
Category : Science
Languages : en
Pages : 180
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Book Description
The text describes the main features of currently available heat pumps, focusing on system operation and interactions with external heat sources. In fact, before choosing a heat pump, several aspects must be assessed in detail: the actual climate of the installation site, the building’s energy requirements, the heating system, the type of operation etc. After discussing the general working principles, the book describes the main components of compression machines – for EHPs, GHPs and CO2 heat pumps. It then addresses absorption heat pumps and provides additional details on the behavior of two-fluid mixtures. The book presents a performance comparison for the different types, helping designers choose the right one for their needs, and discusses the main refrigerants. Notes on helpful additional literature, websites and videos, also concerning relevant European regulations, round out the coverage. This book will be of interest to all engineers and technicians whose work involves heat pumps. It will also benefit students in energy engineering degree programs who want to deepen their understanding of heat pumps.
Author: Isak Karabegović
Publisher: Springer
ISBN: 3319908936
Category : Technology & Engineering
Languages : en
Pages : 622
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Book Description
The papers included in this book were presented at the International Conference “New Technologies, Development and Application,” which was held at the Academy of Sciences and Arts of Bosnia and Herzegovina in Sarajevo, Bosnia and Herzegovina on 28th–30th June 2018. The book covers a wide range of technologies and technical disciplines including complex systems such as: Robotics, Mechatronics Systems, Automation, Manufacturing, Cyber-Physical Systems, Autonomous Systems, Sensors, Networks, Control Systems, Energy Systems, Automotive Systems, Biological Systems, Vehicular Networking and Connected Vehicles, Effectiveness and Logistics Systems, Smart Grids, Nonlinear Systems, Power Systems, Social Systems, and Economic Systems.
Author: Mikael Axin
Publisher: Linköping University Electronic Press
ISBN: 9176859711
Category : Hydraulic engineering
Languages : en
Pages : 108
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Book Description
This thesis deals with innovative working hydraulic systems for mobile machines. Flow control systems are studied as an alternative to load sensing. The fundamental difference is that the pump is controlled based on the operator’s command signals rather than feedback signals from the loads. This control approach enables higher energy efficiency and there is no load pressure feedback causing stability issues. Experimental results show a reduced pump pressure margin and energy saving potential for a wheel loader application. The damping contribution from the inlet and outlet orifice in directional valves is studied. Design rules are developed and verified by experiments. A novel system architecture is proposed where flow control, load sensing and open-centre are merged into a generalized system description. The proposed system is configurable and the operator can realize the characteristics of any of the standard systems without compromising energy efficiency. This can be done non-discretely on-the-fly. Experiments show that it is possible to avoid unnecessary energy losses while improving system response and increasing stability margins compared to load sensing. Static and dynamic differences between different control modes are also demonstrated experimentally.
Author: Jagadeesha T.
Publisher:
ISBN: 9789384588908
Category : Hydraulics
Languages : en
Pages : 0
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Book Description
Offers a comprehensive treatment of the principles of hydraulics and pneumatics. The main objective is to provide a clear understanding of the concepts underlying hydraulics and pneumatics. Solved question papers and numerical examples are given to aid understanding.
