WO2001025084A1 - Propulsion system for a watercraft - Google Patents
Propulsion system for a watercraft Download PDFInfo
- Publication number
- WO2001025084A1 WO2001025084A1 PCT/DE1999/003213 DE9903213W WO0125084A1 WO 2001025084 A1 WO2001025084 A1 WO 2001025084A1 DE 9903213 W DE9903213 W DE 9903213W WO 0125084 A1 WO0125084 A1 WO 0125084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- cylinder
- drive according
- passage
- drive
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/30—Propulsive elements directly acting on water of non-rotary type
- B63H1/32—Flaps, pistons, or the like, reciprocating in propulsive direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
- B63H11/06—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of reciprocating type
Definitions
- the present invention relates to a drive for a watercraft, in particular for a ship, with a cylinder and a piston running in the cylinder, the cylinder being fixedly connected to the watercraft.
- the present invention is therefore based on the object of designing and developing a drive for a watercraft, in particular for a ship, in such a way that operation which is as maintenance-free as possible is possible with the simplest construction and avoiding any emissions.
- a drive of the generic type is characterized in that the piston has a passage which can be at least largely blocked in a flow direction and can be moved back and forth in a passage of the cylinder which is preferably also at least largely blocked in a flow direction, the passage of the piston depending on the stroke direction is blocked or opened and the passage of the cylinder is possibly at least largely blocked when the piston is open and at least largely opened when the piston is blocked.
- a cylinder-piston arrangement is particularly suitable for realizing a structurally simple drive for a watercraft, namely when the piston moves in a flow direction has at least largely lockable passage, the piston moving back and forth in one passage of the cylinder.
- the piston With the passage of the piston open, the piston can be moved within the passage with the least possible water displacement, depending on the effective cross section of the piston wall. If the passage in the piston is shut off in a flow direction, the piston is able to displace fluid when moving against the shut-off direction, since the piston then works with its entire cross section in the manner of a conventional piston. To this extent, the piston displaces fluid which is expelled from the passage of the cylinder by the movement of the piston.
- the passage of the piston is blocked or opened depending on the stroke direction of the piston, the passage of the cylinder being at least largely blocked when the piston is open and at least largely opened when the piston is blocked. It is not absolutely necessary to block the passage of the cylinder when the piston is open, but it does favor the efficiency of the drive, since such a block prevents an unintentional impulse contrary to the actual direction of travel.
- the passages are blocked both in the piston and in the cylinder by closing the passages, and blocking by means of valves is also conceivable. This will be discussed later.
- the passage formed in the cylinder could have a round cross section in the context of a particularly simple construction.
- the cylinder could be designed as a tube with a preferably round cross section, which results in a particularly simple construction of the cylinder.
- the piston could also be designed as a tube, the wall of the piston being able to be tapered or reduced toward the inflow end. Such a configuration would favor the “return stroke” when the piston is open, insofar as this measure would result in only a slight displacement of the fluid against the direction of travel.
- the piston is designed as a preferably thin-walled tube, which per se results in only a slight displacement of the fluid against the direction of travel, namely due to the small effective diameter of the piston resulting from the wall of the tube.
- the passage extending through the piston could have a round cross-section, which results in particularly favorable flow conditions.
- the piston consists of an electrically conductive material and is driven electromagnetically — quasi contactlessly.
- the passage of the cylinder could be surrounded by two or more electrical coils which can be arranged in succession and can be activated alternately. These coils are fed with direct current, which results in a magnetic field.
- the magnetic field induces current in the piston located in the area of the coil, through which a magnetic field opposing the external magnetic field is built up.
- the piston is moved in one direction or the other out of the area of one coil into the area of the other coil.
- the movement can be reversed by means of the second, third, fourth, etc. coil, which must be reversely polarized accordingly, so that a reciprocating movement of the piston within the passage formed in the cylinder can be realized on the basis of the arrangement selected here.
- the coils could be arranged around the cylinder, side by side over the length of the cylinder. In this respect, the coils could extend essentially over the entire stroke of the piston with essentially the same coil lengths, the piston length being at least largely adapted to the length of a coil.
- valves which can preferably be check valves.
- the valves can be designed, for example, as plate or leaf valves, with no special measures for controlling the valves being necessary.
- the passages of the cylinder and the piston could be closed by means of flaps.
- the flaps are advantageously arranged at the ends of the cylinder and on the piston, so that the running of the piston within the cylinder is not disturbed.
- the flaps could be designed in such a way that they open or close - quasi automatically - due to the water flow, namely according to the above description of the mode of operation of the drive claimed here.
- the flaps are at least slightly subjected to force in the direction of the closed position, elastic means, for example springs, being provided for the application of force. So that the flaps do not open too far, a stop limiting the opening movement could be provided, so that a smooth closing of the flaps - starting from the stop - is possible with minimal effort.
- the cylinder has a filter on the inflow side, which can be made removable. Accidental suction of any part is effectively avoided. Due to the removable design, the filter can be cleaned in a simple manner.
- the cylinder could have a chopper, a screw or the like, preferably driven by the flow, on the inflow side. Such a measure makes it possible to use it in shallow, branched or herb-rich waters.
- the drive can comprise two or more cylinder-piston arrangements working in parallel, an anti-cyclical function of both arrangements being advantageous.
- the pistons of the two or more arrangements run in opposite directions, the direction of ejection being the same.
- the impulses emanating from the drive are "smoothed". This ensures a uniformly operating drive.
- FIG. 1 in a schematic basic illustration, partially in section, a first exemplary embodiment of a drive according to the invention, the piston being located there near the end of the delivery stroke,
- Fig. 2 shows the object of Fig. 1, where the piston is almost there
- Fig. 3 in a schematic diagram, partially in section, a second embodiment of a drive according to the invention, wherein special design measures are provided on the inlet side of the cylinder.
- the figures show two exemplary embodiments of a drive according to the invention for a watercraft, the watercraft not being shown here for the sake of simplicity.
- the drive comprises a cylinder 1 and a piston 2 running in the cylinder 1, the cylinder 1 being firmly connected to the watercraft, not shown. This connection is symbolically indicated by reference number 3.
- the piston 2 has a passage 4 which can be at least largely shut off in a flow direction and can be moved back and forth in a passage 5 of the cylinder 1 which can also be shut off at least largely in a flow direction.
- the passage 4 of the piston 2 is blocked or opened depending on the stroke direction of the piston 2, the passage 5 of the cylinder 1 being at least largely blocked when the passage 4 of the piston 2 is open and at least largely opened when the passage 4 of the piston 2 is blocked. This mode of operation can be seen in FIGS. 1 and 2 together.
- Both the passage 5 formed in the cylinder 1 and the passage 4 formed in the piston 2 have a round cross section in the exemplary embodiments shown in FIGS. 1 to 3. Specifically, both the cylinder 1 and the piston 2 are designed as a tube.
- the piston 2 is driven electromagnetically in all of the exemplary embodiments shown here and, for this purpose, consists of an electrically conductive material.
- Two coils 7 are arranged around the tubular cylinder 1, so that the piston 2 is moved out of the region of one of the two coils when the coils 7 are subjected to a corresponding electrical load. With corresponding polarity of the coils 7 and alternating activation of the coils, a reciprocating movement of the piston 2 is possible.
- FIGS. 1 and 2 further show that the cylinder 1 or its passage 5 is equipped with a filter 9 on the inflow side. This effectively prevents accidental suction of particles of any kind.
- the piston can be driven by means of other electrical and / or electromagnetic measures.
- the flaps 6 are equipped with a stop 12 which limits the opening movement of the flaps 6, so that the spring force is sufficient to automatically close the flaps 6.
- the cylinder 1 has a spiral chopper 13 on the inflow side and a filter 9 connected to it.
- the spiral chopper 13 enables use in shallow waters overgrown with seaweed or the like. Otherwise, the embodiment of the drive according to the invention shown in Figure 3 works in an identical manner.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Actuator (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU16473/00A AU1647300A (en) | 1999-10-05 | 1999-10-05 | Propulsion system for a watercraft |
DE19983693T DE19983693D2 (en) | 1999-10-05 | 1999-10-05 | Drive for a watercraft |
PCT/DE1999/003213 WO2001025084A1 (en) | 1999-10-05 | 1999-10-05 | Propulsion system for a watercraft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE1999/003213 WO2001025084A1 (en) | 1999-10-05 | 1999-10-05 | Propulsion system for a watercraft |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001025084A1 true WO2001025084A1 (en) | 2001-04-12 |
Family
ID=6918854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/003213 WO2001025084A1 (en) | 1999-10-05 | 1999-10-05 | Propulsion system for a watercraft |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU1647300A (en) |
DE (1) | DE19983693D2 (en) |
WO (1) | WO2001025084A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7604520B2 (en) * | 2006-07-31 | 2009-10-20 | Oleg Kotlyar | Electrical linear motor for marine propulsion |
US20100291813A1 (en) * | 2007-07-30 | 2010-11-18 | Oleg Kotlyar | Electrical linear motor for propulsion of marine vessel |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2715884A (en) * | 1952-11-21 | 1955-08-23 | Earl M Greenlee | Trolling attachment for boats |
GB1055066A (en) * | 1964-12-14 | 1967-01-11 | Elektro App Werke Veb | An electro-magnetic oscillating piston pump |
GB1555375A (en) * | 1977-10-10 | 1979-11-07 | Dolan J | Fluid displacement devices |
US4565530A (en) * | 1983-12-05 | 1986-01-21 | Espenhain Donald L | Reciprocating marine propulsion engine |
US4775301A (en) * | 1986-06-27 | 1988-10-04 | Cartwright Garry E | Oscillating electromagnetic pump with one-way diaphragm valves |
US5851130A (en) * | 1997-12-17 | 1998-12-22 | Wainwright; Ralph | Watercraft intake debris cleaner |
-
1999
- 1999-10-05 DE DE19983693T patent/DE19983693D2/en not_active Expired - Fee Related
- 1999-10-05 WO PCT/DE1999/003213 patent/WO2001025084A1/en active Application Filing
- 1999-10-05 AU AU16473/00A patent/AU1647300A/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2715884A (en) * | 1952-11-21 | 1955-08-23 | Earl M Greenlee | Trolling attachment for boats |
GB1055066A (en) * | 1964-12-14 | 1967-01-11 | Elektro App Werke Veb | An electro-magnetic oscillating piston pump |
GB1555375A (en) * | 1977-10-10 | 1979-11-07 | Dolan J | Fluid displacement devices |
US4565530A (en) * | 1983-12-05 | 1986-01-21 | Espenhain Donald L | Reciprocating marine propulsion engine |
US4775301A (en) * | 1986-06-27 | 1988-10-04 | Cartwright Garry E | Oscillating electromagnetic pump with one-way diaphragm valves |
US5851130A (en) * | 1997-12-17 | 1998-12-22 | Wainwright; Ralph | Watercraft intake debris cleaner |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7604520B2 (en) * | 2006-07-31 | 2009-10-20 | Oleg Kotlyar | Electrical linear motor for marine propulsion |
US20100291813A1 (en) * | 2007-07-30 | 2010-11-18 | Oleg Kotlyar | Electrical linear motor for propulsion of marine vessel |
US8157604B2 (en) * | 2007-07-30 | 2012-04-17 | Oleg Kotlyar | Electrical linear motor for propulsion of marine vessel |
Also Published As
Publication number | Publication date |
---|---|
DE19983693D2 (en) | 2001-11-08 |
AU1647300A (en) | 2001-05-10 |
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