Rotary expansible chamber devices – Working member has planetary or planetating movement – Plural working members or chambers
Patent
1998-07-09
2000-05-09
Denion, Thomas
Rotary expansible chamber devices
Working member has planetary or planetating movement
Plural working members or chambers
418112, 418142, F01C 102
Patent
active
060595507
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates, in general, to impeller pumps used for providing continuous power to move liquids and, more particularly, to a twin-cylinder impeller pump with a twin cylinder runner capable of completely sealing the junction between the twin cylinder runner and the intermediate throat of a pump casing with the twin cylinder runner being positioned at its upper or lower dead point, thus effectively sucking and discharging pressurized liquid relative to the pump casing, the impeller pump also having an improved transmission gear mechanism suitable for reducing operational noises and vibrations during a pumping operation.
BACKGROUND ART
Several types of impeller pumps, used for providing continuous power to move liquids, are known to those skilled in the art. In the typical impeller pumps, a blade, gear, screw or cam-type impeller or runner is rotatably arranged in a pump casing, thus being capable of forcibly moving liquids, such as oil or water, under pressure. However, the known impeller pumps are problematic in that the moving distance of a runner is too long to conserve power during every pumping cycle. In addition, the runner of a known impeller pump also comes into contact with violent vortex or turbulent flow of liquid at an exceedingly large contact area during a pumping operation, thus overly consuming power. Such a contact between the runner and the violent vortex or turbulent flow of liquid also generates frictional heat and consumes the runner due to frictional abrasion, thereby preventing the pump from being operated at a high speed and reducing the expected life span of the pump.
Another problem experienced in each of the above impeller pumps is that both a runner and a runner chamber of a pump casing have a complex construction, thus being limited in their design flexibility and use.
Korean Patent Publication No. 91-4769 and Japanese Patent Appln. No. Sho. 63-126511 individually disclose a rotary compressor. In each of the above rotary compressors, one cylindrical rotor or runner is eccentrically arranged in the rotor chamber of a compressor casing and is eccentrically rotated in the chamber, thus compressing liquids prior to moving the liquids. However, the moving distance of the above rotor is too long to effectively accomplish desired operational efficiency of the compressor during an operation. In addition, the above rotary compressors individually require a plurality of spring-biased thin blades and a check valve, with the check valve being used for preventing unexpected reverse flow of liquids from a discharge port during a suction stroke of the rotor. Therefore, the rotary compressors have a complex construction with a plurality of delicate and vulnerable points, which prevent the compressors from being operated at a high speed and high pressure and reduce the expected life span of the compressors.
Korean Patent Publication No. 90-3682 and Japanese U.M. Appln. No. Sho. 61-178289 individually disclose a vane pump with a plurality of spring-biased thin blades. However, each of the above vane pumps has the same problems as that described for the above rotary compressors due to the thin blades.
Korean Patent Publication No. 89-628 and Japanese Patent Appln. No. Sho. 59-222753 individually disclose a scroll-type hydraulic machine. Each of the above hydraulic machines has a complex scroll structure, which includes a plurality of specifically designed involute and arcuate curves. However, such a complex scroll structure makes the production of the hydraulic machines very difficult and increases the manufacturing cost of the machines. In the operation of the above hydraulic machines, pressurized liquid is sucked into and discharged from a machine through variable liquid chambers, which are formed by the movable and stationary scrolls and individually have a small area. Therefore, the hydraulic machines regrettably limit the amount of sucked and discharged liquid during one rotation of the movable scroll relative to the stationary scroll.
In an effort to effec
REFERENCES:
patent: 21632 (1858-09-01), Trimmer
patent: 1041606 (1912-10-01), Dembowsky
patent: 5704774 (1998-01-01), Rha
Denion Thomas
Trieu Thai-Ba
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