Research Of The DP40-2.5 Type Hydraulic Diaphragm Pump

Aiming at the problems on the mud pump and diaphragm pump used in the current industry such as Oil industry, electric power industry, metallurgy industry and the chemical industry, a type of driving force used in the hydraulic-driven diaphragm pump was designed. Compared with the driving force used in the traditional diaphragm pump, the hydraulic-driven replaced the crank linkage driven with a new type of hydraulic cylinder. It was driven by high-power motors and use the confined space on the end of the hydraulic cylinders to change the moving direction of the hydraulic cylinders, making the Pistons achieve a uniform reciprocating linear motion (the pistons in the traditional design make a sine curve movement). The new diaphragm pump will fundamentally solve the problem of unhomogeneity in the traditional diaphragm pump when the slurry is inhaled and discharged, as well as the vibration, noise and other major issues, and will largely reduce the size and the cost of the pump.First, the way of the overall design and methods of concrete realization about the DP40-2.5 hydraulic diaphragm pump are given in this paper, and compared with the traditional diaphragm pumps. After the comparing, the hydraulic diaphragm pump diaphragm pump can solve a lot of question that traditional diaphragm pump can't solve, such as vibration, and large noise and large-volume and so on. All the main parameters of the DP40-2.5 hydraulic cylinders are Initial designed in the hydraulic diaphragm pumps, and the main dimensions of accumulators, pipe and other major structures are selected, reached and calculated.The system dynamic model was established according to the bond graph power and the direction impact of the system was dynamic simulated by the system simulink. The simulation results showed that the impact of system's pressure, the speed of impact, as well as the response time can achieve the design requirements, and after parallel connecting the accumulator, the times and the extend of the fluctuation of the pressure and velocity are significantly reduced, the range to reach the desired expectations and requirements.The final chapter of this design introduced the design methods, principles, steps, etc of the PLC control system, then the diaphragm system, membrane rupture and accident pre-alarm alarm system of the hydraulic diaphragm pump are designed emphasisly, and gave the wiring map of the PLC-controlled diaphragm pump and the main program, and finally introduced a specific anti-interference measures of PLC.