Homogenization of the conveying flow in oscillating positive displacement pumps

Abstract

A method for homogenizing conveying flow from at least two oscillating positive displacement pumps utilizing a drive motor for each pump and a rotating shaft, the fluid conveying flow in a conveying line is generated by the oscillating positive displacement pumps, the drive motors controlled such that the conveying flow generated overall in the conveying line is largely uniform or constant. An apparatus according to the invention is distinguished by at least two oscillating positive displacement pumps, the delivery lines of which are connected to a common conveying line in order to superimpose the individual conveying flows and each have a drive motor which can be operated in electronic synchronization without mechanical coupling in order to achieve a largely uniform or constant total conveying flow.

1 . A method for homogenizing conveying flow in at least two oscillating positive displacement pumps, the drive of each resulting from a drive motor via a rotating shaft, said method comprising controlling said drive motors of said at least two oscillating positive displacement pumps to convey fluid flow in a conveying line such that total conveying flow generated overall in said conveying line is largely uniform or constant. 
     
     
         2 . The method of  claim 1  including having the positive displacement pumps operated in combination with one another without mechanical coupling. 
     
     
         3 . The method of  claim 1  including having the positive displacement pumps operated such that they are synchronized electronically to establish approximately a pulse-free uniform conveying flow or volumetric flow in said conveying line. 
     
     
         4 . The method of  claim 1  including changing the rotational speed of said drive motors of each of said at least two positive displacement pumps such that superimposed conveying flows of said at least two positive displacement pumps result in a largely constant total conveying flow. 
     
     
         5 . The method of  claim 1  including having said shaft of said drive motors of each of said at least two positive displacement pumps perform an adapted rotary movement in order to achieve a constant characteristic of said total conveying flow. 
     
     
         6 . The method of  claim 2  including having the positive displacement pumps operated such that they are synchronized electronically to establish approximately a pulse-free uniform conveying flow or volumetric flow in said conveying line. 
     
     
         7 . The method of  claim 2  including changing the rotational speed of said drive motors of each of said at least two positive displacement pumps such that superimposed conveying flows of said at least two positive displacement pumps result in a largely constant total conveying flow. 
     
     
         8 . The method of  claim 2  including having said shaft of said drive motors of each of said at least two positive displacement pumps perform an adapted rotary movement in order to achieve a constant characteristic of said total conveying flow. 
     
     
         9 . A method for homogenizing the conveying flow in oscillating positive displacement pumps, the drive of which takes place by means of a drive motor via a rotating shaft, characterized in that the fluid conveying flow in a conveying line is generated by means of at least two oscillating positive displacement pumps, the drive motors of which are controlled in such a way that the conveying flow generated overall in the conveying line is largely uniform or constant. 
     
     
         10 . An apparatus for homogenizing conveying flow comprising:
 at least two oscillating positive displacement pumps;   a delivery line for each of said at least two oscillating positive displacement pumps;   a common conveying line attached to each of said delivery lines in order to superimpose individual conveying flows; and   a drive motor for each of said at least two oscillating positive displacement pumps, said drive motors in electronic synchronization without mechanical coupling in order to achieve a largely uniform or constant total conveying flow.   
     
     
         11 . The apparatus of  claim 10  including having said drive motors of each of said at least two oscillating positive displacement pumps be dynamic drives in the form of servomotors. 
     
     
         12 . The apparatus of  claim 11  including having said drive motors of each of said at least two oscillating positive displacement pumps be a permanently excited three phase synchronous servomotor. 
     
     
         13 . The apparatus of  claim 11  including having said drive motors of each of said at least two oscillating positive displacement pumps include diaphragm pumps.