Design And Research On Three Parallel Of Synchronous Internal Gear Pump

In hydraulic systems, hydraulic pumps as the power core of the system in which themechanical energy into hydraulic energy to provide power for the actuator are the“heart” of the hydraulic transmission and control systems. With the development ofmodern industry, research and development of new type gear pumps are increasinglyimportant. The three parallel of synchronous internal gear pump as a new form ofstructure, compared with ordinary gear pumps has many advantages. This thesis carriedout a comprehensive analysis and research to it.In research methods, this thesis comprehensive analysis of the current situation ofresearch and development of gear pumps, by comparing the reference design theory ofinternal gear pump, multi-gear pump and synchronization gear pump, designed a newtype three parallel of synchronous internal gear pump. The main contents of this thesisinclude the following aspects:(1) On the basis of introduction the structural principle of the three parallel ofsynchronous internal gear pump, through analysis of the flow characteristics of theordinary internal gear pump, analyzed and deduced the Instantaneous flow calculationformula of three parallel of synchronous internal gear pump. We get a conclusion thatthe three parallel of synchronous internal gear pump flow characteristics aresignificantly better than ordinary internal gear pump, while by theoretical analysis thegear pump leakage flow is caused by axial and radial gap.(2) This thesis analyzed the mechanical properties of the three parallel ofsynchronous internal gear pump that specifically includes radial hydraulic pressure andthe gear meshing force. Displacement caused by the engagement the static mechanicalproperties that exclude the impact of angle change in high and low pressure zones andtransition zones.(3) Gear pumps are optimized to the minimum flow pulsation and minimum volumefor dual objective optimization function, through the establishment of relevantmathematical models, under the relevant constraints, using MATLAB optimizationtoolbox to draw the optimal relevant parameters resolve of gear pump, a3Dmathematical optimization model of the main components of three parallel ofsynchronous internal gear pump is established under the conditions of the optimal solution.(4) Finally, this thesis uses finite element analysis software ANSYS to analyze solidmodel for modal analysis and obtaine a conclusion that the natural frequency of eachcomponent is much greater than the excitation frequency. So the resonance will notoccur. On the other hand, by modal analysis of the gear, it can provide a theoreticalbasis for vibration analysis, design optimization of dynamic characteristics of threeparallel of synchronous internal gear pump and provides a reference for further optimizethe structure.