Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Patent
1995-07-05
1996-12-31
Kwon, John T.
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
415175, 415180, 416146A, 416174, F04D 2900
Patent
active
055887988
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a rotating machine part with a base or housing which rotates in a heat transmitting medium, particularly a cycloid propeller, and more particularly relates to heat transmission within the housing of the machine part. In the case of such a machine part. The example the wheel body of the cycloid propeller for example, oil which lubricates and cools the bearing points and the transmission circulates in the interior, from which the heat is emitted to the outside via the outer wall of the machine part to the medium. The oil should circulate in the interior in a suitable manner for this purpose. At the same time, the heat transmission surfaces of the machine part are in general located radially on the outside.
The object of the invention is significantly to improve the heat transmission with respect to the bearing point and cooling of the machine part.
SUMMARY OF THE INVENTION
This object is achieved according to the invention by using a heat transmitting liquid medium inside the rotor to flow outward toward the exterior wall of the rotor, particularly under the influence of centrifugal force, and then removing that liquid flow from the exterior and directing it toward the interior of the housing where it is collected for possible later reuse. The apparatus for accomplishing this includes a plurality of return lines arrayed around the interior of the rotating part or rotor. Each return line has an inlet for the returning heat transmitting liquid, which inlet is located in the radially outer region of the rotating machine part. Each return line returns the heat transmitting liquid medium to the vicinity of the central axis of the machine part.
Where the machine part is a cycloid propeller, the propeller includes a plurality of blades arrayed around the rotor axis, and the blades extend down, parallel to the rotor axis. The orientation of each blade around its long axis is adjustable. A central control rod is connected by respective coupling rods to each of the blades so that the control rod through the coupling rods determines the orientations of each of the blades with respect to the rotor as the rotor rotates.
The outlets from each of the liquid transmitting medium return lines are in the vicinity of the central control rod. Around the central control rod are means for collecting the returned heat transmitting medium. The heat transmitting medium within the rotor may be the lubricant which lubricates the individual blades of the cycloid propeller. The solution according to the invention produces a forced flow which makes very good use of the heat transmission capability of the lubricant (or else of other heat transmission mediums).
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an axial section through a ship's cycloid propeller, and
FIG. 2 shows a greatly simplified plan view of the rotor (the rotating machine part).
DESCRIPTION OF A PREFERRED EMBODIMENT
In this case, the propeller comprises the stator 4 and rotor 1 as the main components, which rotor 1 is fitted with the individual blades 2 (in general five in number) by means of the blade bearing 23, 23'. A bearing plate 38 is in this case provided for the upper bearing 23. The rotor is in this case driven via the upper rotor part 3 and by means of the bevel gear 14, which is connected to it, via the bevelled pinion 45, the primary transmission 29, shaft journals 34 and the drive engine which is not shown here.
The propeller blades 2 are displaced in a known manner by the central control rod 5 which is mounted in the central, spherical main bearing 20 such that it can move in all directions. The displacement linkage 7, which originates from the hydraulic actuating motor 16, for displacing the control rod in one direction (for example for forward propulsion) acts on the rod 5 via an upper rod bearing 22. The displacement device in the direction at right angles to this (in the same horizontal plane) is not shown here since it would not be possible to see much of it anyway for drawing reasons. This
REFERENCES:
patent: 2988154 (1961-06-01), Hub
patent: 3371719 (1968-03-01), Bear
patent: 4380417 (1983-04-01), Fork
patent: 4668168 (1987-05-01), Schilder et al.
patent: 4795273 (1989-01-01), Henriksson et al.
patent: 5462406 (1995-10-01), Ridgewell et al.
J.M. Voith & GmbH
Kwon John T.
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