Study On The Temperature Rise And Thermal Deformation Of The Piston Pump With Oil Inlet Forced Cooling

With the continuous development of China’s industry,construction machinery has more and more requirements for hydraulic systems,hydraulic pumps,as important power components of hydraulic systems,also need to adapt to the needs of modern high pressure and long life,and correspondingly have higher requirements in their own structure,working principle,heating deformation.In this paper,the main research results of the team:the principle of forced cooling of oil inlet in the shell,it is applied to the inclined shaft piston pump and its thermodynamic properties are studied and analyzed.The specific work is as follows:Firstly,the development status of inclined shaft piston pump and the progress of hydraulic pump thermodynamic research are briefly explained,and then the principle of forced cooling of oil inlet in the shell and the structure and working principle of the forced cooling plunger pump of the inclined shaft shell oil inlet are explained in deta il,and the improvement of each component is explained in detail,and the Creo software is used to model the parts and the overall assembly in three dimensions.Secondly,the macroscopic method is used to calculate the macroscopic energy of the original inclined shaft piston pump and the oblique shaft shell forced cooling piston pump,and the temperature rise difference between the two under the same working conditions is obtained.The power loss and converted temperature rise of the two key friction pairs of the inclined shaft piston pump are calculated,and the temperature rise characteristics of the two friction pairs are obtained.Then,by using the volume control method,the oil storage chamber of the inclined shaft piston pump housing is divided,the heat transfer of the oil in the respective oil storage chamber is determined,and through the quantitative calculation under the same working conditions,the different situations of the oil temperature rise of the respective oil storage chamber of the inclined shaft piston pump before and after the improvement are obtained.The thermodynamic model of the oblique shaft piston pump system was constructed by AMESim software,and the temperature rise curves of the two were simulated and read.Then the Workbench software was used to compare and analyze the deformation of the parts only due to the influence of the oil temperature in the oil storage chamber.Finally,conduct experiments.Build a temperature rise comparison test bench of inclined shaft piston pump,and make a temperature rise comparison test with time change between the two under rated working conditions,and under different pressure gradients,the temperature rise test of the inclined shaft piston pump before and after the improvement is carried out,and it is concluded that the deformation of each part of the inclined shaft shell forced cooling plunger pump will be smaller,and its overall cooling effect will be better.