Rotary expansible chamber devices – Rotating internal member rotates and oscillates or reciprocates
Patent
1997-10-06
1999-11-30
Vrablik, John J.
Rotary expansible chamber devices
Rotating internal member rotates and oscillates or reciprocates
418195, 366279, F01C 306
Patent
active
059931825
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates:
to mechanical arrangements and particularly to a design of reversible converters of the direction of motion, and more particularly, to devices designed for converting shaft rotation into oscillating motion of working elements (for example, of the type of vanes), operatively connected to the shaft or the oscillating motion of said working elements into the shaft rotation; and
to mechanical arrangements and particularly to a design of positive displacement machines utilizing oscillating working elements, based on said converters.
Said converters can be used:
for transmission of motion to working elements, for example: to the blades of mixers for preparation of mixtures unspecified as for their composition and based on liquid dispersion media or to propellers of the "fish tail" type for vessels, etc., and
as a unified base of said positive displacement machines utilizing oscillating working elements.
Said machines can be used:
(on exerting force upon the shaft) as:
pumps, preferably vacuum pumps, or
compressors and
positive displacement metering pumps, preferably for liquids;
(on applying compressed gas or liquid under pressure alternately to both inlet ports and on utilizing the shaft for taking up and transmitting torque) as:
pneumatic or hydraulic motors, or preferably
flowmeters, mainly of liquids.
Said fields of application are typical for uni- and multisectional machines according to the invention.
Utilization of a plurality of such machines, aggregated about a common shaft, allows production of:
multistage pumps or compressors of high pressure,
air or hydraulic starters mainly for heavy-duty Diesel engines, preferably for vessels.
And, at last, the utilization of a plurality of such pneumatically or hydraulically connected machines allows production of synchronous pneumatic or hydraulic drives preferably for heavy-loaded conveyors.
BACKGROUND ART
Positive displacement machines are widely used in modern engineering. Many of them are products of mass or large-scale production.
Therefore it is highly desirable that these machines possess:
as high as possible reliability;
as high as possible specific power and, accordingly, as low as possible specific material consumption in manufacturing;
as great as possible efficiency and, accordingly, as low as possible specific energy consumption per unit of performance, and last but not least,
as great as possible pliability to unification regardless of a specific application.
As far as such machines are based on converters of the direction of motion, the combined attainment of said requirements is substantially dependant upon the development of the latter.
Converters of the direction of motion for positive displacement machines generally comprise a shaft and an optional working element (usually rigidly) connected to the shaft capable either of affecting a fluid (liquid or gaseous) medium during the rotation of the shaft or of taking up the pressure of such medium and converting it into the rotation of the shaft.
Widely known is, for example, a vane converter of rotary motion comprising a shaft rotatably mounted on at least one bearing and at least one vane preferably radially fixed to the shaft (see, for example: (Politechnical Dictionary. Soviet Encyclopaedia Publishing House, Moscow, 1976, p. 260, entry Vane Machine)).
As specific references to the utilization of the converters of such type can be cited: Rotor Pump (U.S. Pat. No. 3,985,473); Vortex Turbo-Machine (Accepted Application of Japan 2-291499 (1990)); Positive Displacement Engine (Soviet Author's Certificate 600323) and many other pumps, compressors and hydraulic or pneumatic engines.
Vane converters and positive displacement machines based thereon are sufficiently widespread and, as a rule, are rather reliable. Some of them have rather high efficiency and specific power.
However they are so diverse in designs that only classification lists, not speaking of the detailed description of the prior art, can take tens of pages. In the practice of public production and
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Beldy Nikolai Nikolaevich
Beldy Vitaly Nikolaevich
Nikolai Nikolaevich Beldy
Vrablik John J.
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