Scroll device integrating a feed pump

Abstract

A scroll device including two coupled stages on a rotary shaft, at both ends of an intermediate electric power device, wherein the first stage is formed by a first pressure variation device of an operating fluid, comprising a scroll case containing a fixed scroll and a mobile scroll relatively to the case, and with admission and outlet ports, and wherein the second stage is a feed pump which pumps the operating liquid and provides it in return.

1 - 14 . (canceled) 
     
     
         15 . A scroll device including two coupled stages on a rotary shaft, at both ends of an intermediate electric power device, wherein the first stage is formed by a first pressure variation device of an operating fluid, comprising a scroll case containing a fixed scroll and a mobile scroll relatively to the case, and with admission and outlet ports, and wherein the second stage is a feed pump which pumps the operating liquid and provides it in return. 
     
     
         16 . The scroll device according to  claim 15 , wherein at least the first stage comprising an orbital bearing and means for thermally insulating the scrolls, wherein these thermally insulating means include the fixed scroll being separated from the scroll case and a tolerance ring, consisting of a bushing with a flexible radial thickness, being placed between a housing of the mobile scroll and the outer diameter of the orbital bearing. 
     
     
         17 . The scroll device according to  claim 15 , wherein the thermal insulation means are provided by a space between the fixed scroll and the corresponding scroll case. 
     
     
         18 . The scroll device according to  claim 15 , wherein the thermal insulation means are also provided between the mobile scroll and the orbiting bearing. 
     
     
         19 . The scroll device according to  claim 15 , wherein the thermal insulation means comprise a separation disk placed at the bottom of the orbiting bearing which separates the mobile scroll from the rotating bearing by an insulation space. 
     
     
         20 . The scroll device according to  claim 15 , wherein the thermal insulating means comprise an insulating material placed between the orbiting bearing and the mobile scroll. 
     
     
         21 . The scroll device according to  claim 15 , wherein means for preventing thermal deformations of the scrolls are provided. 
     
     
         22 . The scroll device according to  claim 20 , wherein the means for preventing thermal deformations are formed by an expansion ring introducing a local force which deforms the mobile scroll in the direction opposite to its normal deformation direction. 
     
     
         23 . The scroll device according to  claim 15 , wherein the first stage is attached in a scroll case and a transmission system is attached in a transmission case, and wherein the thermal insulation means are provided between the stage and the transmission system, in the form of an insulation plate placed between the scroll case and the transmission case. 
     
     
         24 . The scroll device according to  claim 15 , wherein the intermediate electric power device comprises a rotor and a stator, and wherein a hermetic sleeve is provided between the rotor and the stator. 
     
     
         25 . The use of an apparatus according to  claim 15 , in a hybrid motor vehicle for producing electricity by recovering heat from waste exhaust gas of the engine of the vehicle. 
     
     
         26 . The use of an apparatus according to  claim 15 , for combined production of electricity and heat.