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Rotating hydraulic distributor and method of manufacturing chamfered closing edges of a rotating member of such a distributor
| Details |
Inventors: Bacardit, Juan S.;
Assignee: Bendiberica, S.A. (Barcelona, ES)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:
In a rotating hydraulic distributor of the type comprising two axially adjacent rotating members (20, 23) arranged for relative rotation one with respect to the other over a limited angular range, both said rotating members having cooperating closing edges (30, 31) defining therebetween a modulable fluid flow passage, at least one of said edges (30) presents a chamfer having an evolutive profile with non-parallel generatrices whereby, for each relative angular offsetting between both said rotating members, the fluid flow passsage (S.sub.2) between said cooperating edges has an identical width over the length extension, substantially in the radial direction, of the passage. |
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DETAILED DESCRIPTION One object of the invention is to provide a rotating hydraulic distributor of the type defined above which permits to obtain, for each relative angular offsetting between the distributor rotating members, a fluid flow passage having controlled dimensions and a width substantially equal along the length extension (in the radial direction) of the passage, whereby allowing the provision of a fluid flow passage operating in laminar conditions and preventing occurrence of recirculation phenomena and hydraulic noises.
There is another object of the invention to provide a rotating hydraulic distributor arrangement which permits to efficiently control the fluid flow passages between two adjacent cooperating closing edges of the distributor rotating members.
In order to meet these objects and others, according to a feature of the invention, at least one of said cooperating lateral edges of a first of said rotating members is shaped so as to present a chamfer having an evolutive profile which is determined so as the fluid flow passage between the cooperating edges of both rotating members has, for each relative angular offsetting of said rotating members within at least a portion of the limited relative angular rotational range of said members, a substantially identical width along the length extension in the radial direction of the passage.
According to another feature of the invention, said evolutive profile of the chamfer is a ruled surface (as generated by the displacement of a straight line) with non-parallel generatrices.
The invention as for other object, to provide a single and reliable method of manufacturing such a chamfered closing edge of a rotating member of such an hydraulic distributor.
In relation thereto, according to another feature of the invention, the chamfered edge is punched by means of a die having such an evolutive profile and obtained by wire electro-erosion.
Other features and advantages of the present invention will appear from the following description of embodiments, given for illustrative but non-limitative purposes, made in connection with the appended drawings, wherein:
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