Hydraulic generator-receiver for power transmission

A reversible generator-receiver comprising an assembly comprising

• (a) a plurality of free-floating helical gear means (9, 10) including a driving gear and at least one driven gear interengaging at a mesh point, said gear means having teeth defining spaces between said teeth and two sides, one of said gears (9) having a shaft cooperating with bearings (123);
• (b) a flexible envelope (36) having an inner face surrounding said gear means (9, 10) and having conduits (43) therein;
• (c) a plurality of side plates (21, 22) made of plastic material and bearing against sides of said gear means (9, 10) and in abutment against said envelope (36) by a contact surface at a 45.degree. angle, and provided with seals (58);
• (d) a rigid body (49) and covers (54, 55) having bores and enclosing (a), (b) and (c);
• (e) hydraulic sectors (38) for pressurizing a periphery of said flexible envelope (36) so as to force said flexible envelope against crests of said teeth so as to render said spaces fluid-tight;
• (f) opposed hydrostatic compensation sectors (60) for applying equilibrated pressure to said side plates (21, 22) so as to obtain fluid-tightness on both sides of said gear means (9, 10);
• (g) a hydraulic winding comprising a plurality of rotor conduits in said free-floating gear means (9, 10) and a plurality of stator conduits (23) in said side plates, successive commutations between said plurality of rotor conduits and said stator conduits being provided by ends of said conduits passing one in front of the other along a circle of commutation (20) and simultaneously on said tooth spaces at the level of a rolling pitch circle for another end of said stator conduits to provide permanent connection between said opposed tooth spaces except in zones wherein hydraulic bearings are created, each zone of said hydraulic bearings which is opposite said mesh point being accompanied by (i) a break in the connection between tooth spaces at a given point and a point opposite said given point, and (ii) conservation of pressure by supplying said hydraulic bearing which are created with high pressure via a conduit member from a zone (34) of permanent total pressure;
• (h) said rotor conduits into said gears (9, 10) being constituted by groups of first conduits (102) diametrically opposed around said circle of commutation (20) and parallel to an axis of said gear means, and connecting said diametrically opposed conduits (102) at .pi.;
• (i) said rotor conduits supplying said stator conduits in said plates (21, 11) and said casing (36) through cavities (100) on said circle of commutation (20) and second conduits (23);
• (j) priority valve means (116) being provided for selectively pressurizing and depressurizing said zone (34) of permanent total pressure;
• (k) said side plates (21, 22) being molded on an insert comprising two circular parts joined by a bi-concave joint and having an inner face and an outer face, said outer face being flush with the inner face of each said side plate;
• (l) said outer face of said insert comprising grooves (210) into each of which the plastic material constituting said side plates (21, 22) penetrates to form a bead in which each said cavity (100) is formed.