Abstract:In view of the problems of the mud pump and diaphragm pump used in industries of electric power,metallurgy and chemical,a new type of driving force used in the hydraulic-driven diaphragm pump was designed.Compared with the driving force used in the traditional pumps,the hydraulic-driven was used to replace the crank linkage one.It is driven by high-power motors.The moving direction is changed by using the confined space on the end of the hydraulic cylinders to make the pistons to achieve a uniform reciprocating linear motion(the pistons in the traditional design make a sine curve movement).The new diaphragm pumps will fundamentally solve the uneven problem in the traditional ones when inhaling slurry,as well as vibration,noise and other major issues,and will largely reduce the size and cost of the pump.