Bearings – Rotary bearing – Antifriction bearing
Patent
1990-06-13
1991-03-05
Footland, Lenard A.
Bearings
Rotary bearing
Antifriction bearing
384 99, 384611, 384613, F16C 1910
Patent
active
049972928
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to the mechanical engineering, an in particular, it deals with a vertical bearing assembly and may be used in heavy-duty high-speed vertical shafts and in vertical centrifugal machines, drilling rigs and generators.
BACKGROUND OF THE INVENTION
In the conventional vertical bearing assemblies, bearings are installed in series on a shaft and are separated by rigid sleeves. This results in a non-uniform load on the bearings thus lowering durability of the assembly.
The most similar to the invention is a vertical bearing assembly, comprising antifriction bearings mounted one above another in a casing in a radially spaced relation thereto, each bearing being formed by bodies of revolution positioned between inner and outer races, and a system for redistribution of load between the bearings (SU, A, 681250; 509732).
The system for redistribution of load is formed by elastic members in the form of Belville or other springs located between inner and outer races of the bearings, the elastic members being unconnected to one another. With this construction, when the assembly is loaded, forces are transmitted in a sequence from one bearing to another. As a result, all bearings are loaded with the initially applied force. Thus the load is not uniformly distributed among the bearings. This lowers durability of the assembly, especially at high speeds.
SUMMARY OF THE INVENTION
The invention is based on the problem of providing a vertical bearing assembly in which the load redistribution system is so constructed as to ensure a uniform distribution of load among the bearings so as to enhance durability and reliability of the assembly.
This problem is solved by that in a vertical bearing assembly comprising antifriction bearings mounted in a casing in a radially spaced relation thereto, each bearing having bodies of revolution positioned between outer and inner races, and a load redistribution system among the antifriction bearings having elastic members placed between the inner or outer races of all bearings, according to the invention, the load redistribution system comprises rigid spacer sleeves provided between outer or inner rings, respectively, of adjacent bearings, separating members provided between the races of the bearings which are in contact with the elastic members, an axial clearance being defined therebetween, and coupling members engaging one another and, via the separating members, the elastic members.
The provision of the separating members and coupling members and forming an axial clearance between identical races of the bearings make it possible to load all the bearings so as to redistribute the load among the bearings, the load applied to one bearing being proportional to the number of the bearings.
The coupling members are preferably made in the form of bushings, each having an inner annular shoulder defining the separating member, the bushing being movable along the casing, the elastic members comprising spacers so as to simplify design of the assembly.
The elastic and separating members may be in the form of hollow chambers communicating with one another and filled with a compressed gas, the separating members being rigidly secured to the casing. This construction makes it possible to ensure a low fundamental frequency of the assembly and enhance its damping capacity thus, in the end of the day, lowering loads in the assembly and enhancing its durability.
In accordance with an embodiment of the vertical bearing assembly, it is provided with a unit for controlling operation of the hollow chambers, comprising a pressure source, high- and low-pressure receivers and a feedback line, the high- and low-pressure receivers being connected to the hollow chambers, pressure source and feedback line.
This construction makes it possible, depending on speed of the bearing assembly, to vary its fundamental frequency instantaneously so as to materially reduce amplitude of oscillations of the bearing assembly under acceleration and braking conditions, i.e. in the resonance mo
REFERENCES:
patent: 4240683 (1980-12-01), Crase
patent: 4363608 (1982-12-01), Mulders
patent: 4892423 (1990-01-01), Takahashi et al.
Anofriev Pavel G.
Klimkovsky Bronislav M.
Pasalsky Vladimir M.
Patser Alexandr I.
Potapov Nikolai M.
Footland Lenard A.
Nauchno-Proizvodstvennoe Obiedinenie po Mekhanizatsii Robotisats
LandOfFree
Vertical bearing assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vertical bearing assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vertical bearing assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-493092