Theoretical And Experimental Analysis Of Double-stator Axial Hydraulic Motor With Rectangle Slider

When one motor is required to output multiple fixed torques and constant rotating speeds, the existing fixed displacement motors can not meet the needs yet. For this reason, a series of novel kind of pumps and motors were designed, which were based on a new structure called by double-stator. For double-stator, one rotator correspond two stators and more than one pump or motor can work alone or be combined just in one shell. By the different combination of inlet and outlet ports, several different torques and rotating speeds can be supplied by one of these kinds of fixed delivery motors under the same input flow, and without variable mechanism or any other help. The functions of differential motors are achieved, which expand the range of applications and improve the adaptability for the motor. Furthermore, there is a type of proportional relation for output torque and rotating speed. When it is used as the pump, several pumps can be formed in one shell working in different pressures without compression release valve. In summary, this paper presents a new industrial design that is capable of generating large numbers of possible design concepts of hydraulic systems automatically for specified operation requirements.In this paper, firstly the research status and development trend of hydraulic technology and axial hydraulic motor were reviewed. A theory for multi-pump and multi-motor hydraulic systems is presented based on the analysis of the advantages and disadvantages of the popular hydraulic transmission and the hydraulic motor (pump). Next, the theoretical study and simulation analysis of double-stator axial hydraulic motor with rectangle slider were discussed in detail, including kinematics and dynamics. The mathematical model of displacement, velocity and acceleration of slider was established as well as the instantaneous output angular velocity and torque of one motor and two motors simultaneously working, respectively. Some useful conclusions are obtained after Matlab simulations are carried which according to the actual size of the prototype of the novel motor. Several possible ways to leakage are analyzed and the major leaks out surface of mathematical models are found for this new type of motor. The characteristics of the movement and force of the main move parts are simulated, and some shortcomings of prototype design have found. Static flow analysis is made for the vertical valve plate of the motor, and the speed and pressure of hydraulic oil are studied. This research work lays a theoretical foundation for the study of the support features and leakage pulsation of double-stator axial hydraulic motor. Finally, the prototype tests are carried to verify the correctness of this type of hydraulic motor, and the text summarizes and future work is discussed.Based on the above research, the mathematical descriptions and simulation results of this novel motor are obtained, and lay a theoretical groundwork to get the access to reduce the development costs and actual production stage in a short time. Analysis and simulation methods appeared in this paper can be used in other papers for hydraulic components analysis as reference.