Rotary shafts – gudgeons – housings – and flexible couplings for ro – Having lubricating means – For coupling having torque transmitted via intermeshing teeth
Patent
1984-07-18
1985-12-03
Levy, Stuart S.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Having lubricating means
For coupling having torque transmitted via intermeshing teeth
277212F, 464154, E21B 402
Patent
active
045563985
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to drilling equipment and, more particularly, to hinge joints of screw planetary hydraulic drilling machines permitting the transmission of force between the shafts disposed at an angle and varying in the course of the machine operation.
BACKGROUND OF THE INVENTION
Known in the art is a hinge joint for a screw planetary hydraulic drilling machine, comprising two universal joints interconnected by means of a shaft.
Each universal joint comprises a cylindrical casing whose inner wall is provided with a gear ring made therein. The casing houses two half-couplings which are arranged coaxially and engage the gear ring of the casing. The butt ends of the half-couplings, facing each other, have hemispheres made in the middle thereof to accomodate a ball, the radius of the latter being smaller than that of the hemispheres by a value proportional to the angle of turning of the hemispheres relative to the joint casing.
The casing is closed from the opposite sides with covers placed therein by means of a screw joint. The space between the gear rings of the half-couplings and the casing is filled with lubricant and is insulated with seals placed in the casing between the covers and the butt ends of the casing gear ring. Each of the seals is made as a rubber ring tightly fitted with its outer cylindrical face into the joint casing and with its inner face onto a half-coupling. Disposed at both sides of the ring on its flat end faces are rigid (metallic) rings of which one rests upon the gear ring of the casing and the other one contacts the inner butt end of the cover. In order to provide for skewness of the half-coupling relative to the joint casing, required in the course of operation, the rings have some gap provided between their inner diameter and the diameter of the half-couplings (see, for example, USSR Inventor's Certificate No. 543,730; Cl.E21B 3/12).
Displacement of the contacting faces of the rubber ring and the half-coupling, taking place under the action of the alternating contact load caused by pressing (oscillating) movement, results in additional one-sided deformation of the rubber rings. As a result of the non-uniform deformation of the rubber rings, the flushing fluid penetrates the gap formed between the rings and the half-coupling and, on getting into the joint space, washes out the lubricant.
Besides, high temperatures created during the well drilling cause, in the hinge joint employed in the drilling motor used for drilling oil and gas wells volumetric expansion of the lubricant which is squeezed out of the joint inner space. As a result, the gaps thus formed in the joint are filled up with the flushing fluid when the motor is lifted and the temperature drops.
A decreased amount of the lubricant and presence of the flushing fluid in the space of the universal joint result in a quick wearing of the gears of the rings of the half-couplings and the gears of the rings of the casing during transmission of the torque.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a hinge joint for screw planetary hydraulic drilling machines, in which the constructive embodiment of the seal would be relatively simple in design and, at the same time, would considerably prolong service life as compared to the known hinge joints.
This object is accomplished by the fact that in a hinge joint for a screw planetary hydraulic machine, having two interconnected universal joints each comprises a casing having a gear ring made in its inner wall and closed with covers at each end, two half-couplings axially arranged in the casing and having outer gear rings engaging the rear ring of the casing and a ball disposed between them, and two seals mounted in the casing between the covers and the respective butt ends or end faces of the casing gear ring, in which hinge joint, according to the invention, each seal is made out of an elastic material as a hose or sleeve which embraces the half-coupling and one end portion of which is adapted to rest upon the end f
REFERENCES:
patent: 1440847 (1923-01-01), Sundh
patent: 2134302 (1938-10-01), Haushalter
patent: 2670976 (1954-03-01), Owen
patent: 2841966 (1958-07-01), Belden et al.
patent: 2924954 (1960-02-01), Panhard
patent: 2975620 (1961-03-01), Shipley et al.
patent: 3469854 (1969-09-01), Linwood
patent: 3651662 (1972-03-01), Hoffman
patent: 3669459 (1972-06-01), Bass
patent: 3897070 (1975-07-01), Anderson et al.
patent: 3921989 (1975-11-01), Ward
patent: 3973782 (1976-08-01), Evans
patent: 3999901 (1976-12-01), Tschirky
patent: 4066269 (1978-01-01), Linne
Baldenko Dmitry F.
Goldobin Vladimir B.
Gusman Moisei T.
Kochnev Anatoly M.
Nikomarov Samuil S.
Levy Stuart S.
Stodola Daniel P.
Vsesojuzny Nauchnoissledovatelsky Institut Burovoi Tekhniki
LandOfFree
Hinge joint for a screw planetary hydraulic drill does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hinge joint for a screw planetary hydraulic drill, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hinge joint for a screw planetary hydraulic drill will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1392749