Schunk Hoffmann Carbon Technology AG and Ac2t Research Gmbh | Date: 2017-02-08
An electrical machine with a brush commutator arrangement (1)is proposed. Brushes (3) and a commutator (5) are adapted and arranged such that, upon operating the electrical machine (1), the brush (3) and the commutator (5) are displaced relative to each other in a lateral displacement direction (7) and a contact surface (9) of the brush (3) mechanically contacts a contact surface (11) of the commutator (5) along an overlapping area (13) thereby generating an electrical contact. Accordingly,an electric current is transmitted between brush (3) and commutator (5) through the overlapping area (13). An orthogonal electrical conductivity of the brush (3) and/or the commutator (5) in a direction(25) orthogonal to a respective contact surface (9, 11) locally varies along the lateral displacement direction (7). An orthogonal electrical conductivity distribution in the brush (3) and/or the commutator (5) is adapted such that, even when operating the electrical machine at maximum allowable power, for at least 90% of all spatial configurations during displacing the brush (3) and the commutator (5) relative to each other, an electrical current density through the overlapping area (13) does not exceed 130% of a rated maximal average electrical current density through the brush commutator arrangement (1).Due to the specific variation of orthogonal electrical conductivity within the brush (3) or commutator(5), sparking and resulting wear in the proposed brush commutator arrangement (1) may be reduced.
Agency: European Commission | Branch: FP7 | Program: MC-ITN | Phase: PEOPLE-2007-1-1-ITN | Award Amount: 2.72M | Year: 2008
Recently, ionic liquids (IL) are employed as substitute for traditional solvents in catalysis, synthesis and electrochemistry. But little research work or actual applications have been published until now concerning the utilization of IL as lubricants. Generally, IL show no or very low vapour pressures, satisfying viscosity-temperature behaviour, no inflammability and high thermal stabilities up to 250C. The choice of cation and anion as well as the design of side chains determine fundamental IL properties. These properties desirable for lubricants and the possibility to create tailor-made compounds give rise to the demand of in-depth investigations of IL in tribology. To our best knowledge, the project will be the first extensive and integral approach of IL towards potential future applications as lubricants for metals, ceramics and polymers as well as base for wear and friction reducing nanoparticles. The investigations will involve molecular design and synthesis of new IL as well as preparation of advanced materials containing or based on IL. Evaluation of lubricant and material performance will range from determination of physico-chemical properties including artificial aging of IL and mechanical testing (e.g. tensile and impact strength) to tribometrical experiments. Wear and friction properties will be completed by thorough surface characterization, in particular towards tribochemical reaction layers. Parameters gained from these experiments will be used for modelling of triboprocesses in nanoscale and for molecular design of new ionic lubricants. Studies on biodegradability, toxicology and economical aspects will be studied in detail, too, to verify legal requirements and opportunities for highly potential applications. The overall objective of this interdisciplinary and intersectorial approach is the generation of unique and comprehensive knowledge about IL on a sustainable basis for future implementations as high performance lubricants.
Agency: European Commission | Branch: FP7 | Program: MC-ITN | Phase: FP7-PEOPLE-2011-ITN | Award Amount: 3.37M | Year: 2012
The main aim of the ENTICE proposal is to provide professional development in the multidisciplinary field of ENgineering Tribochemistry and Interfaces for IC Engines, capable to develop the new generation of clean and energy-efficient engines. It aims to train the next generation of researchers to work in diverse teams, to cross disciplinary and sectoral boundaries and apply advanced communication and information technologies to work across many scales of time and space. Detailed project objectives are: 1. To provide scientific and professional development to a highly motivated group of early stage researchers (ESRs) to address a number of key interdisciplinary research issues of great importance to the future of transport industries. 2. To facilitate and support scientific and professional development of two experienced researchers (ERs) to enable them to become the research leaders in two challenging interdisciplinary research areas. 3. To disseminate the knowledge and products developed through scientific research to industry, policy makers and the wider academic community for maximum impact of the research. 4. To initiate a sustainable long-term research, training and educational collaboration between the partners involved. Here we propose the development of a training network that brings together some of the key active research groups in Europe, with a leading international reputation, in complementary areas relevant to the fields of tribochemistry and interface design. A number of leading industrial companies, comprising of SMEs and LEs, will engage in training and facilitate the Transfer of Knowledge (ToK) to and from the industrial partner through research programmes for 12 ESRs and 2 ERs. The training programme proposed comprises two key elements; generic training to cover aspects of training required for future research leaders in academia and industry and on-the-job training which will include specialised project-specific skills and development.
Agency: European Commission | Branch: H2020 | Program: Shift2Rail-RIA | Phase: S2R-CFM-IP3-01-2016 | Award Amount: 2.80M | Year: 2016
Research into Enhanced Track, Switches and Structure The railway of the future needs to meet the predicted growth in societal demand in terms of capacity and service, address the environmental challenges of the 21st century, and enable the political objectives of the European Union. IN2TRACK is to set the foundations for a resilient, consistent, cost-efficient, high capacity European network by delivering important building blocks that unlock the innovation potential that have been identified as part of the Shift2Rail Innovation Programme 3. Overall objectives of IN2TRACK are divided into three parts; Enhancing and optimising the switch & crossings and track systems in order to ensure the optimal line usage and capacity; Investigating novel ways of extending the life of bridges and tunnel assets through new approaches to maintaining, repairing and upgrading these structures; Development and adoption of a holistic, whole system-approach. A whole-system approach, which is defined as the system boundaries extending from dynamic wheel-rail interaction (loading input) through to degradation of the S&C system, sub-systems, individual components, and underlying track foundation, will also be at the heart of IN2TRACK on how to reach the objectives. This IN2TRACK proposal addresses each of the areas identified in the H2020-S2RJU-2016-01 call. IN2TRACK is fully aligned with Shift2Rail IP3 in its objectives, approach, and ambition; addressing early enhancements and innovation opportunities.
Agency: European Commission | Branch: FP7 | Program: BSG-SME | Phase: SME-2013-1 | Award Amount: 1.22M | Year: 2013
We will \ develop an integrated sensor system for in-line oil condition monitoring covering the most important oil condition parameters including corrosion (acidity) for industrial power generator engines or turbines; \ develop a novel sensor for the online measurement of corrosion effect as a direct indicator for the acidity of the engine oil which is a critical parameter in case of bio-fuel operated combustion engines; \ be able to ensure the protection of the machine by online monitoring, while allows the optimization of the oil change interval, leading to reduced maintenance costs in the long-term, especially in case of large oil fillings. The partners have a clear and proven technological concept for the development of the novel corrosion (acidity) sensor as well as the cooperation with leading oil sensor producer enables an in-depth insight to current market needs. The research on the novel corrosion sensor has started already 8 years ago, reaching by now a technological level allowing the step towards a commertial product.
Hussainova I.,Tallinn University of Technology |
Antonov M.,Tallinn University of Technology |
Zikin A.,Tallinn University of Technology |
Zikin A.,Ac2t Research Gmbh
Tribology International | Year: 2012
WC based and yttria stabilized zirconia doped (13 vol%) cermets with different metal binders (Co, Ni or Fe) have been successfully produced and tested for performance in erosive media (silica abrasive particles; particle velocity of 80 ms -1 and impact angles of 30° and 90° ). An increase in fracture toughness and erosion resistance was shown to be influenced by tetragonal zirconia transformability. Wear performance of the newly developed cermets is found to be highly dependent on sintering conditions. © 2011 Elsevier Ltd.
Agency: European Commission | Branch: H2020 | Program: Shift2Rail-RIA | Phase: S2R-CFM-IP5-01-2015 | Award Amount: 3.48M | Year: 2016
The FR8RAIL project proposal is submitted as part of the Shift2Rail Research and Innovation Action. Within the FR8RAIL project proposal there are eighteen European partners. The main aim of the FR8RAIL project proposal is the development of functional requirements for a sustainable and attractive European rail freight. These objectives of FR8RAIL are: A 10 % reduction in the cost of freight transport measured by tonnes per Km. A 20 % reduction in the time variations during dwelling and increase attractiveness of logistic chains by making available 100 % of the rail freight transport information to logistic chain information systems. The objectives of the FR8RAIL project will be achieved by developing a number of vital areas within freight rail. There are six main areas of work that form the backbone of this proposals approach in achieving the development of functional requirements for a sustainable and attractive European rail freight. The work areas are 1) Business Analytics, KPIs, Top Level Requirements, 2) Condition Based and Predictive Maintenance, 3) Telematics & Electrification, 4) Running Gear, Core and Extended Market Wagon, 5) Automatic Coupling, 6) High level System Architecture and Integration. The outcome of FR8RAIL and its deliverables are expected to positively contribute to and support the Shift2Rail goals set out in the Strategic Masterplan and the Multi Annual Action Plan viz. to strengthen the role of rail in the transport system, and in particular freight rail transport.
Petrica M.,Ac2t Research Gmbh |
Badisch E.,Ac2t Research Gmbh |
Peinsitt T.,Sandvik AB
Wear | Year: 2013
Wear caused by abrasion is the predominant factor in mining industry. Abrasive wear is a rapid and severe process due to the contact between abrasives and solid material surfaces. This type of wear is usually classified into two categories: (i) 2-body abrasive wear and (ii) 3-body abrasive wear according to the type of contact that occurs between the abrasives and the material. The tribological system formed in mining environment embraces both abrasive wear categories. The focus of this paper is to bring in detailed focus the 2-body and 3-body wear behaviour based on correlations which point out some physical and mechanical rock properties having a significant influence. The study was based on three different rock types wearing a typical martensitic steel 42CrMo4 (DIN 1.7225) under 2-body conditions using a Cycling Impact Abrasion Test (CIAT) and 3-body conditions using a Slurry Steel Wheel Abrasion Test (SSWAT). Results showed that tested rocks perform totally different when the testing conditions are changed. Furthermore, the specific wear energy under 3-body conditions was calculated in order to gain understanding regarding energy needed to produce wear. © 2013 Elsevier B.V.
Totolin V.,Ac2t Research Gmbh |
Minami I.,Iwate University |
Gabler C.,Ac2t Research Gmbh |
Dorr N.,Ac2t Research Gmbh
Tribology International | Year: 2013
The unique properties of ionic liquids favour their applications in diverse fields, such as synthesis, catalysis, electrochemistry and nanotechnology. Their application as lubricants in several systems has found that these substances are able to provide remarkable protection against wear and significantly reduce friction whether they are used as additives or in the neat form. Therefore, in the present work, a further approach to provide halogen-free ionic liquids as lubricants for steel-steel contacts is discussed. The special chemical compositions of two imidazolium borane ionic liquids selected allowed the replacement of hetero-elements such as fluorine and sulphur that are usually found in ionic liquids. Their tribological properties were evaluated with a Schwing-Reib-Verschleiss (SRV) tribometer using an oscillating steel-steel contact with ball-on-disc geometry under boundary conditions. The addition of a phosphate based ionic liquid significantly improved the tribological properties of the imidazolium borane ionic liquids in comparison to a reference halogen containing ionic liquid (used as neat and lubricant additive). XPS analyses of the wear scars confirmed the formation of a phosphate based tribofilm that significantly improved the friction reducing properties and anti-wear performance of the lubricants. © 2013 Elsevier Ltd.
Agency: European Commission | Branch: FP7 | Program: CP | Phase: SPA.2010.2.2-01 | Award Amount: 1.70M | Year: 2011
On spacecrafts reduction of mass and power consumption are a major issue. On the other hand, in case of mechanisms for Solar Arrays or antennas big masses have to be moved and kept in position for long times. Harmonic Drives would fulfil the requirements: high gear ratios enable the use of small actuator motors (low mass and power), they provide high stiffness and high precision even at very low speeds. However, the use is presently limited by the need of grease lubrication. This is linked with risk of outgassing, contamination of other parts and limits the usage in temperatures approx. -50C to \70C. The use of solid lubricants typically for bearings may extremely widen the usage to at least -170C to 300C. First trials to apply these technologies for space use based on commercial available coatings (partially used in space bearings) did not lead to success, due to the strongly differing mechanical and contact situation in the Harmonic Drive. Therefore, project HarmLES will focus on the development of solid lubricant coatings for Harmonic Drives in space. This is seen as an integrated approach between gear design and material adaptation and the application of a suitable coating. It will start with a promising composite coating which has already been tested in space. On the other hand, a huge variety of coatings are available that claim self-lubricating, they will be benchmarked for their applicability in space. Besides space related lab-testing, application testing will ensure the proper feedback. The overall, tribosystem will be re-considered on bases of FEM-simulations and alternative material solutions. An end-user group consisting of several industrial end-users from space will be involved to recommend the research path by defining requirements for later applications. The consortium is small, but it covers the major players and reflects existing expertise in this field to perform the project successfully.