Design Study On55Ml/R Swash Plate Pump With11Pistons

In the modern hydraulic transmission, the axial piston pump is widely used in kinds of machinery because it has many advantages which include small size、great transmission power、high efficiency、easy to control variable and long life. With the axial piston pump turn towards the development of high-pressure、high-speed and large flow, we ask higher performance and environmental requirements. Swash plate pump with9pistons which is widely used don’t have much room for improvement, and its characteristics can’t greatly improve any more. In order to meet hydraulic system’s higher and higher requirements, swash plate pump with11pistons will be used more and more widely.In this thesis, based on BK55swash plate pump, use emulated analyse software to establish swash plate pump’s system model, structural model and flow field model, comparatively analyse swash plate pump’s plus characteristics, its structure’s influence to its plus characteristics and triangle groove depth’s influence to its flow field characteristics, combine theory and simulations, design an swash plate pump with11pistons, which can output55mL/r.The main content is as follows:(1)In the first chapter, it has introduced the research background, and surveyed the research situation of axial piston pump in main research institute at home and abroad. And then cleared the content and purpose of the thesis based on this; Based on analysing BK55swash plate pump’s working principle and characteristics, combine maturity theory and references, study all the swash plate pumps with55mL/r output volume domestic and oversea, preliminarily design swash plate pump’s structure with11pistons, make preparations for the following simulations.(2) According to the theories, it proof and analyse swash plate pump’s plus characteristics and its structure’s influence to its plus characteristics, based on BK55swash plate pump finally summarize the conclusion:swash plate pump’s output volume and load pressure are relevant to its plus characteristics; in order to guarantee it stable, swash plate pump’s oil and damping hole should be as reasonable as possible.(3) Use Pro/e and ANSYS Workbench to establish swash plate pump’s structural model, prove theoretical design, finally summarize the conclusion:considering various factors, structural design which is based on theoretical formula, is reliable, and can meet devise requirement.(4) Before considering the compressibility of hydraulic fluid, use Pro/e to establish three-dimensional, and use ANSYS ICEM CFD and ANSYS CFX to establish swash plate pump’s flow field model, comparatively analyse triangle groove depth’s influence to swash plate pump’s flow field characteristics, finally summarize the conclusion:triangle groove depth is a very important parameter, it’s relevant to swash plate pump’s stability; triangle groove with7°’s depth can reduce cavitation damage effectively, and can guarantee swash plate pump stable.At last, it gave a summary on total research, got the main conclusion and provided the help for he future development.