Rotary expansible chamber devices – Vane or abutment comprises rotatable element – Positively rotated
Patent
1996-04-01
1998-08-18
Vrablik, John J.
Rotary expansible chamber devices
Vane or abutment comprises rotatable element
Positively rotated
F04C 2344
Patent
active
057951438
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The present invention relates to a positive displacement pump apparatus. More particularly, the positive displacement pump apparatus of the present invention is applicable for use in metering fluid flow, power generation, ships propulsion, fans, compressors, artificial heart, pressure regulation, valves and the like.
FIELD OF THE INVENTION
Pumps presently available, in particular high pressure pumps are disadvantaged by their large size. This large size is demanded by the need to accommodate a large diameter impeller.
In addition, such pumps have a low level of efficiency due to their "non-positive" displacement operation. This is typified by the generally rough or pulsing flow produced in the fluid being pumped.
The positive displacement pump apparatus of the present invention overcomes or reduces the abovementioned problems associated with the prior art.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention there is provided a positive displacement pump apparatus characterised by comprising at least one vane provided projecting into a cavity defined within a housing, the or each vane being supported in a rotatable manner on or by a support means, whereby the or each vane is able to rotate within the cavity of the housing through both a positive displacement portion of rotation and a non-positive displacement portion of rotation.
Preferably, the housing has provided thereon a raised member projecting into the cavity within the housing whereby the raised member defines with the housing both a positive displacement region and a return slot within the cavity.
Preferably, the support means comprises a rotatable disc through the rotation of which the or each vane may be moved through a circular arc within the cavity.
Still preferably, the or each vane rotates about its own axis as the or each vane moved through the circular arc driven by the rotation of the rotatable disc.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
FIG. 1 is a top plan view of a positive displacement pump apparatus in accordance with the present invention showing the housing in part only and showing the gearing thereof in part only;
FIG. 2 is a top plan view of the positive displacement pump apparatus of FIG. 1 shown without the gearing and highlighting the positive displacement portion of rotation of the vanes;
FIG. 3 is a cross-sectional view of the positive displacement pump apparatus of FIG. 1 along line 3--3 showing the entire housing, the raised member and the support means;
FIG. 4 is a top plan view of the positive displacement pump apparatus of FIG. 2 showing the position of a single vane through a 360.degree. rotation of the support means (or alternatively the position of two vanes through a 90.degree. rotation of the support means);
FIG. 5 is a top plan view of the positive displacement pump apparatus of FIG. 2 showing a first position of two vanes;
FIG. 6 is a top plan view of the positive displacement pump apparatus of FIG. 5 showing a second position of the two vanes;
FIG. 7 is a top plan view of the positive displacement pump apparatus of FIGS. 5 and 6 showing a third position the two vanes;
FIG. 8 is a cross-sectional view through a positive displacement pump apparatus in accordance with a second embodiment of the present invention;
FIG. 9 is an upper perspective sectional view through a housing of a positive displacement pump apparatus in accordance with a third embodiment of the present invention;
FIG. 10 is a sectional view through a part of the housing and an idler roller of FIG. 9; and
FIG. 11 is a schematic plan view of a ship's hull showing the use of pumps in accordance with the present invention in ship propulsion.
DESCRIPTION OF THE INVENTION
In FIGS. 1 to 8 there is shown a positive displacement pump apparatus 10 comprising a first vane 12, a second vane 14 and a housing 16.
The housing 16 comprises side walls 18 and 20, a base 22 and an upper gear housin
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patent: 1769079 (1930-07-01), Smith
patent: 2919062 (1959-12-01), Tryhorn
patent: 5156541 (1992-10-01), Lew
QVP Pty Ltd.
Vrablik John J.
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