Computational design of swash plate type axial piston pumps a framework for computational design
Abstract
Within this thesis a computational based design methodology for swash plate type axial piston pumps has been proposed. The methodology is divided in three design phases; preliminary design, computational design and computational based design optimization. The preliminary design is based on hand – calculations that are available to the general public. Pump designers in industry develop pumps using a similar method. Phase two incorporates the computational design. A methodology has been developed to use these two phases in order to develop a pump from start to finish. The computational part of the design process is based on the use of in-house developed software. The valve plate optimization tool VPOptim is used to optimize the valve plate. The clearances between the parts and the flow through these gaps are calculated using the simulation tool named CASPAR. An optional phase three is incorporates an optimization loop within phase two. This can be used to test new radical designs, new materials, or improve the results by using a more sophisticated surrogate model to design the part dimensions. In order to test the proposed methodology, an example pump was developed. The design methodology focuses on the rotating group of swash plate type axial piston pumps. The rotating group, determines the reliable operation of the machine, the achievable operating parameters and the efficiency. The proposed new design approach can replace the current trial and error process and will hopefully lead to better designed pumps, that achieve higher efficiencies and use new materials and or coatings and do not need very experienced designers. The use of sophisticated computer models will give the designer much better understanding of the influence of individual design parameters on the pump behavior. The example design of the rotating group of 24cc the pump demonstrated that the proposed approach is feasible and even a non-experienced pump designer can to create a design that has better performance and is more compact than existing industrial standards.
Degree
M.S.
Advisors
Krutz, Purdue University.
Subject Area
Mechanical engineering
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