Floating-bearing motor pump cooled by a circulating fluid

Abstract

The present invention relates to a motor pump ( 10 ) free from bearings, cooler and mechanical sealing, more specifically to a hydraulic motor pump, which comprises a housing ( 14 ) defined by a first chamber ( 19 ) isolated from fluids and a second chamber ( 17 ). In the second chamber ( 17 ) there is an integral rotor/turbine assembly ( 11 ), the rotor and the turbine being induced by magnetic forces of a stator ( 12 ), which is located in the first chamber ( 19 ). A fluid inlet ( 15 ) and a fluid outlet ( 16 ) are located at the same end of the motor pump ( 10 ), so that most of the fluid impelled into the motor pump ( 10 ) is guided directly to the outlet ( 16 ) with the aid of a fluid guide ( 20 ) located at the front end ( 24 ) of the rotor/turbine assembly ( 11 ), enabling an increase in the flowrate inside the motor pump ( 10 ), thus increasing the yield thereof.

1 . Floating-bearing motor pump ( 10 ), cooled by a circulating fluid, which comprises a housing ( 14 ) formed by:
 a first chamber ( 19 ) isolated from fluid, which comprises a stator ( 12 );   a second chamber ( 17 ) that is in fluid communication with a fluid inlet ( 15 ) and a fluid outlet ( 16 ) and that comprises fluid passages ( 17 . 1 ) and a rotor having a turbine coupled at its front end, forming a solidarity rotor/turbine assembly ( 11 );   wherein the rotor/turbine assembly ( 11 ) is bored-through, forming a fluid channel ( 18 ); and wherein said fluid outlet ( 16 ) is orthogonal to a front end ( 24 ) of the rotor/turbine assembly ( 11 );   characterized in that the fluid inlet ( 15 ) and the fluid outlet ( 16 ) are located at a first end (A) of the motor pump ( 10 ); and the rotor/turbine assembly ( 11 ) comprises, fixed at its front end ( 24 ), a fluid guide ( 20 ) with at least one outlet bore ( 22 ).   
     
     
         2 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid, according to  claim 1 , characterized in that the fluid guide ( 20 ) has a conical shape. 
     
     
         3 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to any one of the preceding claims, characterized in that the fluid guide ( 20 ) restricts the entry of the fluid coming from the fluid inlet ( 15 ) in the fluid channel ( 18 ) of the rotor/turbine assembly ( 11 ). 
     
     
         4 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid, according to any one of the preceding claims, characterized in that the entrance of the fluid channel ( 18 ) is located at a second end (B) of the motor pump ( 10 ). 
     
     
         5 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to any one of the preceding claims, characterized in that the fluid passages ( 17 . 1 ) form a constant fluid film ( 13 ). 
     
     
         6 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to any one of the preceding claims, characterized in that the fluid passages ( 17 . 1 ) further enable the fluid to circulate around the first chamber ( 19 ) isolated from fluid, cooling the stator ( 12 ). 
     
     
         7 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to any one of the preceding claims, characterized in that the rotor/turbine assembly ( 11 ) is composed by a ring ( 21 ) to centrifuge fluid. 
     
     
         8 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to  claim 7 , characterized in that the rear part of the ring ( 21 ) comprises at least one relief hole ( 23 ). 
     
     
         9 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to  claim 8 , characterized in that the rear part of the ring ( 21 ) comprises five relief holes ( 23 ). 
     
     
         10 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to any one of the preceding claims, characterized in that the area available for passage of fluid to be carried is substantially constant. 
     
     
         11 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to  claim 9 , characterized in that the loss of fluid transport load is minimal, by virtue of the restriction in the area through which the fluid circulates. 
     
     
         12 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to any one of the preceding claims, characterized in that the space between said rotor/turbine assembly ( 11 ) and the stator ( 12 ) is filled by the walls of the first ( 19 ) and second ( 17 ) chambers. 
     
     
         13 . The floating-bearing motor pump ( 10 ) cooled by a circulating fluid according to any one of the preceding claims, characterized in that the housing ( 14 ) is made from an injectable polymeric material.