Rotary expansible chamber devices – Intermittently accelerated and receding members rotate in... – Each a working member
Patent
1999-05-04
2000-09-05
Denion, Thomas
Rotary expansible chamber devices
Intermittently accelerated and receding members rotate in...
Each a working member
418135, 418132, 418 34, 418 39, 418 1, 417204, 123 847, 123 56, 123245, F01C 100
Patent
active
061133701
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a rotary-vane machine (RVM) for use as a compressor, a vacuum pump, a pneumatic motor, a liquid pump, a hydraulic motor or an internal combustion engine.
BACKGROUND ART
The disadvantages of the conventional reciprocating piston compressors and pumps are well-known: low ratio of power developed to machine mass and relatively low mechanical efficiency. The same holds true also for conventional rotary-laminar and screw compressors and pumps.
While V-type engines have a higher power/mass ratio, such designs as the Wankel engine have serious sealing problems even today.
There exists a rotary vane machine (U.S. Pat. No. 5,366,356) which comprises stationary end members connectable to one another, a rotor body rotating at uniform speed and having two first vanes, and two second vanes driven by the rotor body via a system of levers controlled by a camming mechanism, due to which the second vanes rotate at a periodically increasing and periodically decreasing speed. The serious disadvantage of this machine resides in the fact that the lever system making up the kinematic connection between the two types of vanes constitutes considerable inertial masses carrying out nonsymmetrical movements over large angular ranges, generating inertial forces exceeding the working load of the machine. The ensuing vibrations and noise preclude the construction of machines rotating at higher speeds.
DISCLOSURE OF THE INVENTION
It is thus one of the objects of the present invention to overcome the above disadvantage and to provide a mechanically efficient RVM generating minimal inertial forces and thus safely operable at high speeds.
According to the invention, the above object is achieved by providing a rotary-vane machine comprising a stationary shell including a casing member, a camming ring having an internal, non-circular camming surface, and a flange member; a rotor including at least two first vanes fixedly attached to, or integral with, said rotor, and adapted to rotate, together with said rotor, at uniform speed; a first cover plate fixedly attachable to said rotor and integral with a first shaft supported on its free end by bearing means mounted in said casing, and being provided with at least four ports for access or egress of a working medium; a second cover plate fixedly attachable to said rotor; a second shaft supported by first bearing means accommodated in said first cover plate and by second bearing means accommodated in said second cover plate; at least two second vanes fixedly attached to said second shaft and oscillatably accommodated within said rotor, and defining, together with said rotor, said first vanes and said first and second cover plate, a plurality of chambers; a cross piece integral with said second shaft and having at least one lateral projection mounting at least one block pivotable about a pivot; at least one third shaft eccentrically projecting from said second cover plate, the end portion of which shaft is connected to a coupling member for connection to a source of rotational power; at least one cam follower pivotably mounted between said second cover plate and said coupling member on said at least one third shaft and comprising two rollers riding along the internal surface of said cam follower, further comprising two laterally extending arms, the ends of which are adapted to act on said cross piece; an inlet and outlet manifold mounted in said casing and rotationally stationary relative thereto and in contact with said first cover plate, said manifold having at least one pair of inlet and outlet ducts and ports disposed so as to provide communication between said ports in said first cover plate and an inlet and outlet port respectively in said casing; wherein a rocking motion of a relatively small angular extent produced in said at least one cam follower when said rollers ride along said non-circular camming surface will cause said arms to superpose on said second vanes a rotary motion of a much larger extent that is alternatingly add
REFERENCES:
patent: 1330629 (1920-02-01), Gooding, Jr.
patent: 1904892 (1933-04-01), Trube
patent: 2271068 (1942-01-01), Gardner
patent: 3292602 (1966-12-01), Stewart
patent: 3697201 (1972-10-01), Elckmann
patent: 3776203 (1973-12-01), Joyce, Sr.
patent: 4334841 (1982-06-01), Barlow
patent: 4416598 (1983-11-01), Merz
patent: 4664078 (1987-05-01), Bender
patent: 4687427 (1987-08-01), Seybold
patent: 4738235 (1988-04-01), Silvoza
patent: 5181843 (1993-01-01), Hekman et al.
Denion Thomas
Rototor Ltd.
Trieu Thai-Ba
LandOfFree
Rotary vane machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary vane machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary vane machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2206274