EP0570561A1 - Dispositif de propulsion par jet d'eau - Google Patents

Dispositif de propulsion par jet d'eau

Info

Publication number
EP0570561A1
EP0570561A1 EP92924704A EP92924704A EP0570561A1 EP 0570561 A1 EP0570561 A1 EP 0570561A1 EP 92924704 A EP92924704 A EP 92924704A EP 92924704 A EP92924704 A EP 92924704A EP 0570561 A1 EP0570561 A1 EP 0570561A1
Authority
EP
European Patent Office
Prior art keywords
rotor
shaft
rotor shaft
water jet
jet drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92924704A
Other languages
German (de)
English (en)
Inventor
Manfred Schulze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jetmarine AG
Original Assignee
Jetmarine AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jetmarine AG filed Critical Jetmarine AG
Publication of EP0570561A1 publication Critical patent/EP0570561A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/042—Axially shiftable rotors
    • 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
    • B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F04D3/005—Axial-flow pumps with a conventional single stage rotor

Definitions

  • the invention relates to a water jet drive with a stator and a rotor, which are surrounded by a housing having an inlet and an outlet nozzle, in which the rotor shaft carrying the rotor is rotatably mounted by means of shaft bearings arranged upstream and downstream.
  • jet drives like the known screw drives, are manufactured as complete drive units and are obtained from boat-building yards and are connected there to the finished boat hulls. Suitable openings for this purpose must be made in the boat transom.
  • jet drives among other things, also to train the boat bottom in such a way that the inlet finds anal space for its arrangement.
  • the upstream shaft bearing is the boat wall of the boat to be connected to the jet drive, which is designed as part of the inlet channel, while the downstream shaft bearing is arranged in a hub of the part of the housing of the jet drive which forms the rotor.
  • the design of the jet drive is such that the inlet channel lies outside the hull, so that only openings for the shaft of the drive unit have to be provided in the hull of the hull.
  • water jet drives have a so-called pump with a stator and a rotor for accelerating and for ejecting the water required for generating the propulsion.
  • a stator and a rotor for accelerating and for ejecting the water required for generating the propulsion.
  • the opposing boundary surfaces of the housing or stator and rotor blade can be cylindrical and / or conical.
  • the object of the invention is therefore to improve the known water jet drives and to design them in such a way that simple assembly and adjustment of the rotor shaft is possible.
  • this object is achieved in that the shaft bearings supporting the rotor shaft have a configuration which enables an axial displacement of the rotor shaft which is adjustable via an external actuator.
  • a pulley is assigned to the rotor shaft as a torque-transmitting means, which pulley is freely rotatable on the rotor shaft and is connected to the rotor shaft in a rotationally fixed manner via a tooth coupling that enables axial movement of the rotor shaft.
  • the toothed coupling which is positively connected to the rotor shaft is arranged in a mounting flange which is firmly connected to the pulley and the mounting flange is fixedly connected to a cover hood which is centrally penetrated by a lockable one-piece member via which the rotor shaft is axially displaceable with respect to the belt pulley, the belt pulley being rotatably but axially immovably supported by means of ball bearings on a bearing sleeve centrally penetrated by the rotor shaft and axially fixed on the bearing sleeve by means of snap rings, and wherein the bearings ⁇ sleeve at its free end has a bearing flange for detachable connection to the boat transom of a watercraft.
  • the inventive design of the rotor shaft and its torque-transmitting members as a belt pulley enables both a simple construction of the drive unit and its adjustment. Furthermore, the bearing of the drive or rotor shaft according to the invention enables an axial offset between the drive-side and output-side bearings within certain limits, which has an extraordinarily favorable effect on assembly and operation, in particular in the case of quasi-rigid water vehicles, such as inflatable boats.
  • FIG. 1 shows a perspective view of a watercraft in the form of an inflatable boat with a water jet drive
  • Figure 2 shows the drive shaft according to the invention in section.
  • a drive shaft 10 which is also referred to below as a rotor shaft - see FIG. 2 - passes through a bearing sleeve 11 which can be freely rotated and pushed back and forth with axle play, which has a bearing flange 14, via which the bearing sleeve on the boat transom 15 or on an end face, not shown Mounting plate of the water jet drive of a watercraft is rigidly fastened.
  • the bearing sleeve 11 is part of a power transmission device K for the drive shaft 10, which will be described below.
  • the watercraft can be designed as a boat or yacht or - as shown in FIG. 1 - as an inflatable boat SB, in which case the boat mirror 15 is made of wood or metal.
  • a water jet drive ST is associated with the watercraft SB, of which only the housing, consisting of the housing shells 18 and 19 screwed together, and the pump P encompassed by it are shown in FIG.
  • the pump P includes, inter alia, a rotor 20 assigned to the drive shaft and a stator 21 which is rigidly connected to the housing shell 19.
  • the one free end 23 of the drive shaft 10 is rotatably supported to a certain extent in a pivot bearing 24 which is arranged in a bearing opening 25 of the stator 21, while the other end of the drive shaft is rotatably mounted in the power transmission device .
  • the rotor 20 with its hub 30 is rotatably connected to the drive shaft 10.
  • the water entering via an inlet of the water jet drive (not shown here) is accelerated by the pump P and exits via an outlet channel (also not shown here) with a generally controllable nozzle and thereby produces the desired propulsion for the watercraft .
  • the pump is driven by the force transmission device K, which has a pulley 40 with a circular cross section that serves to drive the drive shaft 10.
  • the pulley is a toothed belt, a motor, not shown here, for. B. a gasoline or diesel engine assigned.
  • the belt pulley is rotatably supported on the outer surface of the bearing sleeve 11 by means of two ball bearings 42 and 43 which are arranged at a distance from one another and are supported on a collar 38 of the belt pulley 40, the ball bearings being so-called snap rings 65 and 66 are axially fixed on the outer jacket of the bearing sleeve 11.
  • a cross-sectionally substantially L-shaped mounting flange 45 is fixedly but releasably connected, which rests with a collar 46 on the inner surface of the pulley and with an end face 47 on the end face of the pulley is present.
  • the end face 49 of a coupling hood 50 which is essentially funnel-shaped in cross section is fixedly but releasably connected and comprises an extension 37 of the mounting flange 45.
  • the mounting flange 45 also has a part 53 of a tooth coupling 55 in a central opening 51, the other part 56 of which is wedged on the facing end of the drive shaft 10.
  • the drive shaft 10 is non-rotatably, but axially displaceable in the direction of arrow 58 with respect to the belt pulley, connected to the mounting flange 45 and thus to the pulley 40, when driven the mounting flange and the coupling hood and so on also rotate the drive shaft in the same direction.
  • the coupling hood 50 is penetrated centrally in the axial direction by an adjusting member in the form of an adjusting screw 60, which can also be adjusted in the direction of arrow 58 via a threaded connection 61.
  • the respective setting position is by means of a lock nut 62 noticeable.
  • the end face 63 of the adjusting screw 60 bears against the spherically shaped end face 12 of the drive shaft 10.
  • the drive shaft 10 is supported in two places, namely at one end 23 by means of the swivel slide bearing 24 and at the opposite end by means of the force transmission device K which holds the ball bearings arranged on the bearing sleeve 11 42 and 43, the two bearings allowing movement of the drive shaft 10 in the direction of arrow 58 within certain limits, via the mounting flange 45, which is firmly connected on the one hand to the belt pulley 40 and on the other hand to the clutch cover 50 via the screws 41, and which is connected in a rotationally fixed manner to the drive shaft 10 via the tooth coupling 55, the drive movement transmitted to the pulley 40 is forced via this tooth coupling of the drive shaft 10 and thus the rotor 20 of the pump P.
  • the drive shaft 10 and thus the rotor 20 can be axially adjusted or adjusted, ie adjusted, with respect to the stator 21 or the housing by means of the adjusting screw 60. Since the clutch cover 50 is firmly connected to the pulley 40 as a result of the screws 41, the adjusting screw 60 rotates synchronously with the pulley 40 and thus with the drive shaft 10, so that there is no relative movement between the facing end faces of the adjusting screw 60 and the drive shaft 10 can take place. Since the adjusting screw 60 with respect to the boat transom 15 points into the interior of the watercraft, the drive shaft 10 and thus the rotor 20 can be adjusted with respect to the stator 21 or the housing from there, without dismantling the power transmission device or the housing . ö

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

L'invention concerne un arbre d'entraînement (10) d'un dispositif de propulsion par jet d'eau ayant un stator (21) et un rotor (20) renfermés dans un logement (18, 19) comprenant une entrée et une tuyère de sortie. Le palier en amont sert d'élément de transmission de forces (K), et permet d'ajuster axialement l'arbre d'entraînement (10), donc d'ajuster le stator et le rotor par rapport au logement. L'arbre d'entraînement est relié à une bride de montage (45) par un accouplement à dents (55) de manière à tourner avec celle-ci. La bride de montage (45) est fixée d'une part à une poulie (40) et d'autre part à un capot d'accouplement (50) dont le centre est axialement traversé par un organe d'ajustement (60) susceptible d'être fixé qui forme pour l'arbre d'entraînement une butée axialement mobile par rapport à la poulie.
EP92924704A 1991-12-11 1992-12-10 Dispositif de propulsion par jet d'eau Withdrawn EP0570561A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4140881A DE4140881A1 (de) 1991-12-11 1991-12-11 Wasserstrahlantrieb
DE4140881 1991-12-11

Publications (1)

Publication Number Publication Date
EP0570561A1 true EP0570561A1 (fr) 1993-11-24

Family

ID=6446823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92924704A Withdrawn EP0570561A1 (fr) 1991-12-11 1992-12-10 Dispositif de propulsion par jet d'eau

Country Status (5)

Country Link
US (1) US5366396A (fr)
EP (1) EP0570561A1 (fr)
JP (1) JPH08558B2 (fr)
DE (1) DE4140881A1 (fr)
WO (1) WO1993011998A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19755563C1 (de) * 1997-12-13 1999-02-11 Daimler Benz Ag Mittellager für eine Welle
SE518942C2 (sv) * 2000-10-02 2002-12-10 Rolls Royce Ab Axiellt justerbar trycklagring för stråldriftsaggregat
US6884129B2 (en) * 2001-08-20 2005-04-26 Bombardier Recreational Products Inc. Jet pump bearing assembly
JP4680653B2 (ja) * 2005-03-30 2011-05-11 本田技研工業株式会社 小型艇の駆動軸支持構造
US8241079B2 (en) * 2009-08-27 2012-08-14 Applied Combustion Technology, Inc. Pump jet assembly and related adapter system and method

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR716181A (fr) * 1931-04-28 1931-12-16 Perfectionnements aux pompes centrifuges
US3207116A (en) * 1964-03-30 1965-09-21 France Arnold Attachment of jet propulsion units to water-borne craft and means for steering the unit
US3405526A (en) * 1967-03-01 1968-10-15 Twin Disc Inc Multiple stage, hydraulic jet propulsion apparatus for water craft
US3422789A (en) * 1967-09-13 1969-01-21 Wynn Gill Associates Inc Marine propulsion unit
DE1756081A1 (de) * 1968-04-01 1970-03-19 Ski Craft Gmbh & Co Kg Hydraulischer Strahlantrieb fuer Schiffe,insbesondere Boote
US3868833A (en) * 1972-12-21 1975-03-04 Brunswick Corp Shaft coupling apparatus particularly for marine inboard-outboard propulsion systems
DE2830944C2 (de) * 1978-07-14 1980-01-17 Dietze & Schell, 8630 Coburg Antrieb an Spulmaschinen zur Erzeugung einer periodisch schwankenden Drehzahl
US4509773A (en) * 1984-05-09 1985-04-09 Borg-Warner Corporation Pump-mechanical seal construction with axial adjustment means
FI85618C (fi) * 1985-12-11 1992-05-11 Ahlstroem Oy Anordning foer axiell foerskjutning av en pumps loephjul.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9311998A1 *

Also Published As

Publication number Publication date
JPH06505461A (ja) 1994-06-23
JPH08558B2 (ja) 1996-01-10
US5366396A (en) 1994-11-22
DE4140881A1 (de) 1993-06-17
WO1993011998A1 (fr) 1993-06-24

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