Radial Swivel Motor and Process for Manufacturing Same

Abstract

To improve the surface finish of the inner circumferential surfaces of the stator and to reduce the manufacturing effort, it is proposed that the stator with a stator housing 1 and with the stator blades 13 have a two-part design and to insert the stator blade 13 into the stator housing 5 in such a way that they rotate in unison. In terms of the process, it is proposed that a commercially available tube with an inner circumferential surface suitable for use as a sealing surface be used and that longitudinally extending joining means be prepared. The stator blades 13 manufactured as an individual part receive corresponding joining means, so that the stator housing 5 and the stator blades 13 are welded, clamped or screwed together.

1 . A radial swivel motor, comprising:
 a stator with at least one, radially inwardly directed stator blade;   a rotor mounted in said stator with rotor blades, which form between said rotor and said stator at least one hydraulic, variable-volume pressure chamber and just as many hydraulic, variable-volume drain chambers;   frame sealing elements in said stator blades and in said rotor blades, wherein said pressure chambers and said drain chambers are sealed hydraulically against each other by said frame sealing elements in said stator blades and said rotor blades, said stator having a multi-part design comprising a stator housing and said stator blade, said stator blade being inserted into said stator housing in such a way that said stator housing and said stator blade rotate in unison.   
   
   
       2 . A radial swivel motor in accordance with  claim 1 , wherein said stator housing has for each said stator blade a longitudinally extending mounting slot and each said stator blade has a mounting tongue fitting said mounting slot and said stator housing and said mounting tongue of said stator blade are connected to one another by a weld seam prepared on the outer circumference of said stator housing. 
   
   
       3 . A radial swivel motor in accordance with  claim 2 , wherein to form a groove for said weld seam, said mounting slot of said stator housing and said mounting tongue in said stator blade have circular conical surfaces. 
   
   
       4 . A radial swivel motor in accordance with  claim 1 , wherein said stator housing, for each said stator blade, has at least one longitudinally extending wedge-shaped groove and each said stator blade has an outer shape fitting said wedge-shaped groove, said wedge-shaped groove and the outer shape of said stator blade having such external dimensions that clamping and self-locking pressing are achieved and have a cross section with a dovetail profile. 
   
   
       5 . A radial swivel motor in accordance with  claim 1 , wherein for mutual bracing, said stator housing and each said stator blade have fastening holes, said stator housing is provided with a fitting groove and each said stator blade is provided with a fitting tongue to mutually secure the positions, and each said stator blade carries at least one said sealing element extending over its entire length to guarantee sealing between said pressure chamber and said drain chamber. 
   
   
       6 . A radial swivel motor in accordance with  claim 1 , wherein for securing against rotation, said stator housing has at least one position-securing groove extending over the entire axial length for each said stator blade and said stator blade is designed in its outer area as a fitting tongue, while each said stator blade has a wedge-shaped design over an entire axial length thereof in the area of lateral surfaces thereof for clamping and self-locking frictional engagement, and a spacer shell having lateral surfaces extending in a wedge-shaped pattern on one side and on the other side between two said stator blades. 
   
   
       7 . A process for manufacturing a radial swivel motor, the process comprising:
 providing a rotor;   providing stator covers;   providing individual stator blades;   providing sealing elements;   cutting a commercially available tube bar material to a length with an inner circumferential surface suitable for use as a sealing surface to manufacture a stator housing, the inner contour of said inner circumferential surface being prepared and front surfaces being finally leveled off and provided with recesses for said sealing elements and with holes for fastening said stator covers, wherein said stator is assembled nondetachably from said stator housing and said individual stator blades, wherein each said stator blade is manufactured with a finished contour providing longitudinally extending joining means fitting said stator housing.   
   
   
       8 . A process in accordance with  claim 7 , wherein said stator housing receives said mounting slots and each said stator blade receives mounting tongues, which are welded together in the assembled state on the outer surface of said stator housing. 
   
   
       9 . A process in accordance with  claim 7 , wherein said stator housing receives said wedge-shaped grooves and each said stator blade receives has a wedge-shaped outer shape, which are pressed together with said stator housing into a respective one of said grooves in the assembled state on the outer surface of said stator housing. 
   
   
       10 . A process in accordance with  claim 7 , wherein said stator housing receives said fastening holes and said fitting grooves and each said stator blade receives fastening holes and a fitting tongue, which are screwed together in the fitted state on the outer surface of said stator housing. 
   
   
       11 . A process in accordance with  claim 7 , wherein a commercially available tube without special requirements on the surface finish of the inner circumferential surface is used to manufacture said stator housing, said stator housing has said position-securing grooves and each said stator blade receives an outer shape coordinated with said position-securing grooves as well as lateral wedge surfaces, and a spacer shell with lateral wedge surfaces is inserted between two said stator blades, said stator blades and said spacer shells being pressed together on their wedge surfaces in a self-locking manner.