Characteristic Analysis And Structural Design On Gear's Multiple-port Pumps

In the lubrication system of vast mechanical rail, the fluid static-pressure lubrication system can cancel the crawl and ensure the longevity and security of mechanical rail, etc. So it has been gotten the extensive application.The lubrication system of quantitative oil supplying is one type of the fluid static-pressure lubrication system. It can supply equivalent oil for every lubrication point of mechanical rail and keeps system stable. The gear pump has such merits as simple structure, easy manufacture, low cost, insensitive oil pollution, etc. It is often adopted as energy supply device in the lubrication system.In the lubrication system of quantitative oil supplying, if it is adopted the means that single pump and diffluence supply oil, the system may be non-stabilized, because the oil quantity of every lubrication point may be different, when different pressures cause different liquid resistance. If it is adopted the means that single pump and single oil recess supply oil, its cost is too high.Gear's multiple-port lubrication pump is a new-style hydraulic power component based on the theory of the common external meshing gear pump, and it is applicable in lubrication system. Its flow velocity is not affected by laden, homogeneous, and can supply equivalent oil for every lubrication point. Furthermore, its volume is oppositely small and can achieve the preformance of multiple pumps. If it is adopted, the system can avoid the problems that single pump and diffluence or single pump and single oil recess exist.At present, it is not researched in our country and all of products come from foreign countries. So this dissertation analyses and researches this kind of pump according to foreign products.This dissertation synthetically analyzes the theory of the principle, account of discharge and flow, structural characteristics and testing standards of gear's multiple-port pumps. In the analysis of radial force, it demonstrates that the radial hydraulic pressure, meshing force and resultant force are balanced on the center wheel. It theoretically analyzes the flow characteristic and dynamic characteristic. Moreover, the improvement of flow pulsation is proposed and is accordingly introduced in detail. The emulational conclusion by MATLAB is same as theoretical analysis. Based of the practicality, a model is researched and manufactured by the designing precept in this dissertation. It has twenty exports. Furthermore, blueprint of the gear's multiple-port lubrication pump is designed by PRO/ENGINEER and is finished.