US3299863A

US3299863A - Rotors of rotary engines

Info

Publication number: US3299863A
Application number: US444134A
Authority: US
Inventors: Castelet Gaetan De Coye De
Original assignee: Renault SAS
Current assignee: Renault SAS; Regie Nationale des Usines Renault
Priority date: 1964-04-04
Filing date: 1965-03-31
Publication date: 1967-01-24
Anticipated expiration: 1984-01-24
Also published as: DE1451821A1; FR1398965A; GB1102027A; OA01684A

Description

G. DE CQYE DE CASTELET RoToRs oF ROTARY ENGINES Filed March 3l, 1965 INVEM'QR CTEL. n DQCOJDQ Cdsfe /e ananas Patented Jan. 24, l967 3,299,863 RTRS F RTARY ENGNES Gatan de Coye de Castellet, Billancourt, France, as-

signor to Regie Nationale des Usines Renault, Biilan court, France Filed Mar. 31, 1965, Ser. No. 444,134 Claims priority, application France, Apr. 4i, 1964i, 969,796, Patent 1,398,965 1 Claim. (Cl. 12.3-8)

The parts or a rotary engine, especially the rotor, are subjected to a thermal flux and also to heat stresses which make special cooling arrangements necessary.

A known solution consists of arranging a circulation of a cooling liquid in the interior of the rotor, this circulation being effected by starting from the hottest zones.

It is known that in rotary engines of the type having tive working chambers in the stator and with four lobes on the rotor, ve explosions are `produced for one-half revolution of the rotor, and since the rotor and the stator act like two gears differing by one tooth, and since on the other hand the order of tiring is 1, 3, 5, 2, 4, the result is that only two opposite lobes are associated with the explosions of the engine which subjects them to high thermal and mechanical fatigue stresses, whereas the tWo other lobes are less affected by the working of the engine.

In a prior application, the present applicants have proposed to arrange inside the rotor two conduit systems for the cooling liquid, each of these comprising a radial intake conduit leading the liquid to a peripheral conduit which rst passes round a hot lobe and then a cold lobe, before bringing the said cooling liquid baclt to a radial outgoing conduit.

The present invention has for its object an improved circuit arrangement for the cooling liquid, for the purpose of reducing the weight and simplifying the assembly of `the rotor. To this end, the liquid is brought in from the hub through radial conduits directly to the summits of the hot lobes, from which it passes into chambers located on eac-h side and extending under the cold lobes, but without any lperipheral circulation channel being provided, the liquid returning through passages opening from these chambers into the hub.

With this arrangement, it is possible during moulding to give the cores large central bearing surfaces which enable them to be held in position in the ymould without dificulty, the cleaning of the moulded parts being effected easily and completely.

One form of construction in accordance with the invention has been shown by way of example in the accompanying drawings, in which:

FIG. 1 is a transverse section of a rotor;

FIG. 2 is a cross-section taken along the line lI-II of FIG. 1;

FIG. 3 is a cross-section along the line III-lll of FIG. 1.

The rotor 1 according to the invention comprises four lobes 2, 3, d, 5, two of which, 2 and 4 having opposite summits and intended to function as hot lobes, are provided radially wit-h hollow arms 6, '7, forming passages for the cooling liquid and opening into the hub 8. The interior portion ot' the rotor is divided-up by the

arms

6 and 7 and the

partitions

9 and 10 into our

chambers

11, 12, 13 and 14, into which the cooling liquid passes through the extremities of the

arms

6 and 7 which communicate respectively with the two adjacent chambers, and from which the said liquid is evacuated through the

openings

15, 16, 17 and 18, after 'having passed through the cold lobes, but without any denitely established circulation being produced in this Zone.

Transverse webs

19, 20, 21 and 22, couple together the

sides

23 and 24 of the rotor.

It can be seen that with this conformation of the rotor, the cores which serve for casting the hollow portions can be given large central bearing surfaces which enable them to be held easily in position in the mould and further ensures easy cleaning of the cast parts.

What is claimed is:

A rotor for a rotary engine of the type having a stator and a rotor, five Working chambers in said stator and four lobes in said rotor, two of said lobes working as hot lobes, the other two as cold lobes, said rotor comprising an annular surface, side plates and a hub with an internal surface, in w-hich said rotor is provided with a cooling system constituted by two hollow radial arms, each extending between said hub and the summit of one of said hot lobes, passages being provided close to t-he periphery between said arms and the adjacent chambers formed between the hub and the periphery, said ar-ms and intermediate internal partitions, the circulation of cooling liquid taking place rst through said arms, then through the chambers and returning through openings into the interior of said hub.

References Cited by the Examiner UNITED STATES PATENTS 3,102,682 9/1963 Paschke 230-145 3,111,884 11/1963 Peras 123-8 3,112,870 12/1963 Bentele 230210 3,131,679 5/1964 Peras 103-130 3,176,915 4/1965 Bentele et al. 230-210 3,204,614 9/1965 Huber 230-210 3,206,109 9/1965 Paschke 230-145 v FOREIGN PATENTS 1,359,797 3/1964 France. 1,372,662 8/1964 France.

978,210 12/1964 Great Britain.

DONDEY l. STOCKING, Primary Examiner.

W. I. GOODLIN, Assistant Examiner.