Rotary expansible chamber devices – Rotating internal member rotates and oscillates or reciprocates
Patent
1991-07-03
1992-09-15
Vrablik, John J.
Rotary expansible chamber devices
Rotating internal member rotates and oscillates or reciprocates
123221, 123241, F01C 306, F02B 5300
Patent
active
051471930
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a power conversion machine comprising a first rotor part with a first pair of pistons and a second rotor part with a second pair of pistons adapted to be moved in a spherical cavity in the machine housing, the second pair of pistons being positively movable in a rocking movement back and forth in relation to the first pair of pistons, the first rotor part being connected to a driving or driven rotary shaft, while the second rotor part is non-rotatably connected to the first rotor part so as to perform a conjoint movement of rotation about the axis of rotation of the rotary shaft, the first rotor part being rotatable in a first path of revolution in a plane at right angles to the axis of rotation, while the second rotor part is rotatable together with and rockable in relation to the first rotor part, and the second rotor part being guided by a guide member rotatable in a second path of revolution inclined by means of stationary guide means at an angle v in relation to the first path of revolution.
The present power conversion machine may be used in various fields, e.g. as a single-stage or multistage compressor, pump, hydraulic or pneumatic engine and, respectively, as a two-stroke or four-stroke internal combustion engine etc. The machine can be employed for a large spectrum of various speeds. The machine is particularly useful as a high-speed machine, such as a high-speed compressor or high-speed engine. When the machine is in the form of a pneumatic motor, steam engine or internal combustion engine and has a moderate working volume, a speed of 500 r.p.s. (30,000 r.p.m.) can be used. When the machine is an internal combustion engine, a speed of about 100 r.p.s. (6,000 r.p.m.) can be suitable. In other cases, a speed of 50 r.p.s. can be more relevant for special other applications. In connection with propelling engines (e.g. diesel engines) for vessels, significantly lower speeds can be convenient in consideration of the speed of the propellers, and speeds of 100 r.p.m. for the propeller(s) can then be relevant also to the propelling engine. A special object is to provide a machine which effectively balances the moving masses in the machine, which results in minimal vibrations in the machine when operating. A further object is to provide a machine of a comparatively compact design with relatively few and simple parts and relatively small volume and weight in relation to its output. A still further object is to provide a machine whose working chambers are sealed from the parts of the machine which are lubricated. A further object is to provide a machine in which simple and effective guiding of the various ports in the machine housing is achieved.
U.S. Pat. No. 826,985 (D. Appel) which was granted in 1906 gives a solution of the type mentioned by way of introduction, which yields a favourable movement of the pistons and the associated working chambers relative to the various ports, based on a simple design with no crankshaft and no separately moving valves.
The prior art solution suggests the provision of a stationary guide means which is positioned radially outside the working chambers of the machine, for positively guiding the second pair of pistons in a rocking movement in relation to the first pair of pistons. There is disclosed an annular guide member which is guided in the stationary guide means in a guiding groove which is formed in the actual machine housing and which moreover extends radially beyond the actual machine housing.
According to the prior art solution, the first pair of pistons perform, in practice, a movement of rotation only, while the second pair of pistons perform a corresponding movement of rotation and, besides, an additional, positively guided rocking movement back and forth in relation to the first pair of pistons. By means of said radially outer guide means, the second pair of pistons are positively guided in a special path of movement in a stationary plane in the spherical housing, i.e. with an annular guide means inclined in a path of revolution
REFERENCES:
patent: 168034 (1875-09-01), Lyon
patent: 826985 (1906-07-01), Appel
patent: 1967167 (1934-07-01), Weis
3D International A/S
Hand Francis C.
Vrablik John J.
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