Joints and connections – With adjunctive protector – broken parts retainer – repair,... – Position or guide means
Patent
1981-11-30
1985-01-29
Scanlan, Jr., Richard J.
Joints and connections
With adjunctive protector, broken parts retainer, repair,...
Position or guide means
403337, 403 16, 411 55, 411 63, 411389, 416244A, F16D 100
Patent
active
044962592
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a connector for connecting two rotors together, each rotor ending in a plate. Each plate has a plurality of orifices disposed around its circumference, each orifice of one plate being adjacent an orifice of the other plate and being intended to have fixing components inserted in them to connect the two plates together. Said fixing components are of a first type and of a second type. The fixing components of the first type, each are constituted by a clamping bolt whose dimensions allow it to enter with play into an orifice before machining. The orifices are located adjacent the fixing components of the second type, each of which is provided to be inserted in two precision-reamed bores of same cross-section obtained by reaming adjacent orifices and located one facing another when the clamping bolts are in place. Each fixing component of the second type has firstly, a sleeve which is cylindrical on the outside and conical on the inside and secondly a shank which has firstly a conical portion which pushes the sleeve against the walls of the precision-reamed bores, secondly a threaded portion at one end with a nut screwed onto it, said nut fixing the shank in position and thirdly an end which allows gripping.
Such a connector is described in French patent application No. 76 25 692 published under the No. 2,322,296. The axial forces are transmitted by the clamping bolts and torsion is transmitted by the shanks in the sleeves.
In the known connector, the sleeves are deformed against the walls of the precision-reamed bores by the pressure of the conical portions of the associated shanks.
Thus, during normal operation, it is possible to keep the initial alignment of the rotors.
However, because of the initial stress, the sleeves and the shanks have less initial shearing capacity. Further, to allow easy deformation of the sleeves, it is necessary to use thin sleeves.
Also, in the case where an incident occurs because the torque exceeds the value corresponding to the elastic strength of the sleeves, the sleeves are plasticly deformed and can take the form of a hand crank.
These sleeves are then very difficult to remove.
SUMMARY OF THE INVENTION
In the connector according to the invention which allows these drawbacks to be avoided, each sleeve is formed by two parts formed by longitudinal sawing, each of said parts being slightly smaller than a half cylinder so that when in position, the two parts of the sleeve are spaced apart.
The two parts of the sleeve which are pushed back by the associated shank press against the walls of the bores without deformation and if, subsequent to an incident, they are cranked, it is possible, after removing the shank, to remove the two parts of the sleeve without having to destroy them or risk damaging the bores.
According to a preferred embodiment of the invention, the further end of the shank to the screw is also threaded to allow a hub extractor to be fitted thereon to extract the shank.
The present invention will be better understood from the following description given by way of example with reference to the accompanying drawings:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partially cut away elevation of the connector in accordance with the invention.
FIG. 2 is a panoramic cross-section of the bolts and fixing components.
FIG. 3 is a longitudinal cross-section level with a fixing component, taken about line III of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 illustrates a plate 1 on the end of a rotor 2, said plate being intended to come into contact with a plate 3 on the end of a rotor 4 (see also FIG. 2). To link the two plates together, several clamping bolts 5 (fixing components of the first type) and 4 fixing components 6 (of the second type) are used. The clamping bolts 5 and the fixing components 6 are spaced out on a cylinder whose axis is the same as that of the rotors (see the panoramic cross section in FIG. 2).
FIG. 2 shows a clamping bolt 5 which has a shank 7 ending in a threaded porti
REFERENCES:
patent: 1665988 (1928-04-01), Smith
patent: 1960046 (1934-05-01), Beal
patent: 2872227 (1959-02-01), Wachs
patent: 3298725 (1967-06-01), Boteler
patent: 3328058 (1967-06-01), Gundlach
patent: 3603626 (1971-09-01), Whiteside
patent: 4225264 (1980-09-01), Coone
patent: 4279530 (1981-07-01), Mullenberg
Alsthom-Atlantique
Scanlan, Jr. Richard J.
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