Rotary expansible chamber devices – With mechanical sealing – Vane position adjustment
Patent
1995-12-18
1997-04-08
Freay, Charles G.
Rotary expansible chamber devices
With mechanical sealing
Vane position adjustment
418262, 418266, F01C 1900, F01C 100
Patent
active
056181701
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a rotary machine, such as a motor or a pump.
Rotary machines of this kind that works as a motor or a pump having long been known to the art. The blades or vanes working in the passageway of the rotary machine are held by means of springs in a normal position against the peripheral outer wall of the passageway, against which the blades slide as the rotor rotates. The blades are also subjected to centrifugal forces as the rotor rotates, these forces increasing with increasing rotor speeds. Consequently, the frictional forces generated between blade and chamber wall will therefore also increase, as will also wear on the blades. In turn, this results in power losses. To eliminate this drawback with this type of rotary machine to the best possible extent, movement of the blades can be guided with the aid of camming curves, for instance, c.f. French Patent Specification 1,605,224, or by journalling the pistons excentrically in relation to the centre of rotation, c.f. Swedish Patent Specification 43,515. In addition to the high tolerance requirements that are necessitated by such cams and eccentrics, the cams and eccentrics also take-up the centrifugal forces and are therewith also subjected to friction and wear.
An object of the present invention is to eliminate these drawbacks, which is achieved in accordance with the invention with a rotary machine having the characteristic features set forth in the following claims.
DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to exemplifying embodiments thereof and also with reference to the accompanying drawing, in which
FIG. 1 is a schematic sectional view taken on the line I--I in FIG. 3;
FIG. 2 is a schematic sectional view of the inventive rotary machine taken on the line II--II in FIG. 3;
FIG. 3 is a schematic cross-sectional view of the inventive rotary machine taken on the line III--III in FIG. 2; and
FIG. 4 illustrates schematically a practical application of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The illustrated exemplifying embodiment includes a housing 1 having a generally circular-cylindrical shape and including a peripherally extending passageway 2. The passageway 2 includes a fluid inlet 3 and a fluid outlet 4, wherein the fluid concerned may be liquid or a gas for instance. A constriction 5 is located in the proximity of the inlet 3, between said inlet and the outlet 4. The housing 1 accommodates a rotor 6 which is mounted on a shaft 7 rotatably journalled in bearings 8 in the housing 1. The rotor 6 is disc-shaped and may have any desired thickness, and the sides of the rotor are extended radially to form the passageway 2 between said rotor and the peripheral wall of the housing.
In the case of the illustrated embodiment, the rotor includes two diametrically opposed slots 9, each of which receives a flat slide or blade 10, which is held in position with its outer edge tangential to the peripheral wall of the housing, by a spring 11. It will be understood that the blade, or vane, 10 is configured so as to completely cover or fill the profile of the passageway 2 defined between the housing 1 and the rotor 6, and may be sealingly displaced in a radial direction.
FIG. 2 illustrates a cam 12 which has a curve 13 formed in a certain manner, and which is fixedly mounted on the housing 1. Each blade 10 is provided with a respective axle 14 which extends through a slot in the side of the rotor 6 and beyond said slot, and which carries a roller 15 externally of the rotor on a level with the cam 12.
As the rotor 6 rotates, the roller 15 engages the cam 12 and runs along the curve 13. Because the roller 15 is connected with the blade 10, the blade will follow the radial movement of the axle 14, i.e. the blade is drawn into the rotor 6 upstream of the outlet 4--see FIG. 1--and is held withdrawn during its passage past the restriction 5, whereafter the cam releases the roller, and therewith the axle 14, so that the blade will again fills the
REFERENCES:
patent: 643432 (1900-02-01), Washington et al.
patent: 712456 (1902-10-01), Janssen
patent: 1078168 (1913-11-01), Ruhlmann
patent: 1995755 (1935-03-01), Smith
patent: 5359971 (1994-11-01), Haven
Freay Charles G.
Hogdahl Innovation Aktiebolag
LandOfFree
Rotary motor 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 motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2394585