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WO2018166654A1 - Frein doté d'aimants permanents permettant de mettre à l'eau un équipement de sauvetage - Google Patents

Frein doté d'aimants permanents permettant de mettre à l'eau un équipement de sauvetage Download PDF

Info

Publication number
WO2018166654A1
WO2018166654A1 PCT/EP2018/000128 EP2018000128W WO2018166654A1 WO 2018166654 A1 WO2018166654 A1 WO 2018166654A1 EP 2018000128 W EP2018000128 W EP 2018000128W WO 2018166654 A1 WO2018166654 A1 WO 2018166654A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnets
brake
saving equipment
life
launching
Prior art date
Application number
PCT/EP2018/000128
Other languages
English (en)
Inventor
Ørjan TVEIT
Original Assignee
Heron Davits As
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 Heron Davits As filed Critical Heron Davits As
Publication of WO2018166654A1 publication Critical patent/WO2018166654A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/40—Use of lowering or hoisting gear
    • B63B23/42—Use of lowering or hoisting gear with braking equipment
    • B63B23/44—Use of lowering or hoisting gear with braking equipment on the ship
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/06—Dynamo-electric clutches; Dynamo-electric brakes of the synchronous type
    • H02K49/065—Dynamo-electric clutches; Dynamo-electric brakes of the synchronous type hysteresis type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/02—Davits, i.e. devices having arms for lowering boats by cables or the like
    • B63B23/04—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/02—Davits, i.e. devices having arms for lowering boats by cables or the like
    • B63B23/04—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type
    • B63B23/06—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type with actual pivots
    • B63B23/10—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type with actual pivots with positive drive of the arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/40—Use of lowering or hoisting gear
    • B63B23/42—Use of lowering or hoisting gear with braking equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B23/00—Equipment for handling lifeboats or the like
    • B63B23/40—Use of lowering or hoisting gear
    • B63B23/48—Use of lowering or hoisting gear using winches for boat handling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
    • B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/30—Operating devices electrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
    • F16D59/02—Self-acting brakes, e.g. coming into operation at a predetermined speed spring-loaded and adapted to be released by mechanical, fluid, or electromagnetic means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
    • H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/104—Structural association with clutches, brakes, gears, pulleys or mechanical starters with eddy-current brakes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/09—Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators

Definitions

  • the present invention relates to a brake having permanent magnets for the control of the speed of descent of life-saving equipment in emergency situations from the launching davits thereof.
  • life-saving equipment lifeboats, emergency boats, life rafts, etc
  • ship or other types of platform quadys, oil rigs, etc
  • davits comprise a frame having upper arms wherefrom the boat is suspended by one or more points of suspension by means of ropes or cables.
  • This frame may be pivoting, in which case it pivots about a horizontal axis parallel to the side such as to retract the boat to its inboard parked position or extended to an outboard launching position, wherefrom it will be launched, reeling out the ropes or cables of suspension from the pertinent winding devices (known as winches in the technical sector of the art of navigation, comprising an assembly of motor, reducer, and winding drum of the cable or rope).
  • the davit is rigid (not pivoting) and on other occasions the movement of the boat out to the launching position is occasioned by gravity.
  • the launching of the boat may signify the descent or raising thereof from dozens of metres in height, equivalent to several floors of a conventional land structure, and furthermore the launching of the boat normally occurs with persons within the interior thereof, it is very important to maintain a safe speed of descent and to implement means against dropping to prevent the free fall thereof in the case of breakdown of the winch or in the absence of electrical supply ('dead ship' situation).
  • centrifugal brakes comprise a bell stator and brake linings mounted upon a rotor by means of supports pivoting in a radial sense, the rotor rotating within the interior of the bell stator such that, as the speed of rotation increases, the brake linings tend to open and make contact with greater or lesser force upon the interior of the bell stator, realising the corresponding braking in a manner similar to a centrifugal clutch.
  • the hydraulic brakes comprise a flow control valve limiting the quantity of oil entering the hydraulic motor driving the winch. Moreover, they may cease to function in the case of rupture of the valve or flexible hoses. Additionally, in the case of rupture the spillage of contaminant hydraulic fluid occurs with the consequent environmental problem.
  • induction brakes basically comprising electromagnets generating a magnetic field in the heart whereof there moves an induced rotor, formed in turn by windings wound upon cores of ferromagnetic material such that, supplying the electromagnets to a greater or lesser degree, a greater or lesser induced current is generated in the rotor together with the corresponding magnetic effects and eddy currents tending to oppose the relative movement between rotor and stator.
  • the brake of the invention presents a configuration permitting the utilisation of braking through induction when launching life-saving equipment (for example lifeboats on ships or oil rigs) without the need for electrical supply to the brake. Furthermore, it is a matter of a totally passive and robust element, having minimum maintenance and reliable operation in practically any situation.
  • the principle of operation thereof is based upon converting the dynamic braking energy into heat through eddy currents magnetically induced in the body of paramagnetic material (aluminium, copper, etc) (Joule effect). Along any looped route or line which may be considered in the body there will exist a variation in the magnetic flux inducing a current (Foucault current) opposing said variation, in conformity with Lenz's law.
  • the brake comprises: two coaxial parts presenting relative rotational movement therebetween (basically a stator and a rotor) around the common shaft, wherein a first part comprises permanent magnets, and wherein the second part comprises at least a solid body of paramagnetic material adjacent to said magnets such that the relative displacement thereof within the extent of the lines of flux induces eddy currents, generating forces in opposition to the relative movement between said two parts.
  • adjacent signifies that the body lies within the extent of influence of the lines of flux of the magnets.
  • solid body signifies that it is a monobloc body (without windings), although it may carry machinings or perforations having any geometric configuration.
  • Several brakes may be situated in series to increase the strength of braking.
  • Figure 1 shows a perspective view of a variant of the brake of the invention wherein a rotor having two first rotary discs, wherein the magnets are housed, are located at both sides of a stator comprising a second disc of paramagnetic material.
  • Figure 2 shows a diametral cutaway view of the brake of the invention according to the variant of figure 1 .
  • Figure 3 shows a diagram of another variant of the brake of the invention having the magnets in the stator and the solid body in the rotor.
  • Figure 4 shows a diagram of the centrifugally sliding positioning of the magnets in guides of a rotary disc of a rotor.
  • Figure 5 shows a diagram of the positioning of the magnets in a parked and in an operational position.
  • Figure 6 shows a view of the positioning of the brake of the invention upon a davit in launching position.
  • Figure 7 shows a view of the positioning of the brake of the invention upon a davit in launching position in a variant wherein the winch is located at the base of the davit.
  • Figure 8 shows a detail of the coupling of the brake between the motor and the drum of the davit.
  • the brake (1 ) having permanent magnets for launching life-saving equipment of the invention comprises (see figs. 1 and 2): two coaxial parts having relative rotational movement therebetween about the common shaft (4), - wherein a first part comprises permanent magnets (6), and wherein the second part comprises at least a solid body (9) of paramagnetic material adjacent to said magnets (6) such that the relative displacement thereof within the extent of the lines of flux induces eddy currents generating forces in opposition to the relative movement between the two parts.
  • the magnets (6) are disposed in pairs (5), wherein each pair (5) comprises poles (7, 8) of opposite sign located face-to-face parallelly to the common shaft (4) such as to generate lines of flux between said opposite poles (7, 8), by virtue of the fact that in this manner they will present a greater quantity of flux, the solid body (9) of paramagnetic material being interposed between the magnets (6) of the pairs (5).
  • One of the parts may comprise a rotor (1 1 ) comprising at least a first rotary disc (12), wherein are housed the permanent magnets (6), and the other part comprises a stator
  • the solid body (9) comprises at least a second disc (15) of paramagnetic material parallel to the first disc (12) and wherein are induced the eddy currents.
  • the rotor (1 1 ) will comprise at least a pair of parallel first rotary discs (12) located face-to-face and wherein are housed the permanent magnets (6) having opposite poles (7, 8), the second disc (15) belonging to the stator (14) interposed between the two first discs (12) of the pair.
  • several pairs of first discs (12) may be implemented in a cascaded manner, advantage being taken of both faces of the same, and disposing therebetween the corresponding second discs (15).
  • one of the parts comprises a rotor (1 1 ) comprising a pair of parallel rotary first discs (12) wherein are housed the permanent magnets (6) having opposite poles (7, 8) located face-to-face, and the other part comprises a stator (14) wherein the solid body (9) comprises a second disc
  • the magnets (6) may be mounted upon the first discs (12) in radial guides (16), in the interior whereof are disposed springs (17) thrusting the same towards the interior, having the objective of varying the distance thereof to the common shaft (4) as a function of the speed of rotation, through the effect of the centrifugal force (see fig. 4), such that they attain the most favourable position of actuation, being more distant radially the greater the requirement of braking.
  • one of the parts comprises a stator (24) comprising at least a first disc (12a) wherein are housed the magnets (6), and the other part comprises a rotor (21 ) having the solid body (9) comprising at least a second rotary disc (15a) of paramagnetic material and wherein are induced the eddy currents.
  • Figure 3 shows a diagram of a variant of this embodiment wherein the stator (24) comprises at least two parallel first fixed discs (12a) (specifically two in the figure) and the rotor (21 ) comprises at least a second fixed disc (15a) of paramagnetic material (specifically one in the figure), wherein are induced the eddy currents, disposed between each two first discs (12).
  • brake (1 ) may (see figs.
  • the magnetic brake (1) is situated between the motor (30) and the reducer (38) it may be disposed at any other location whereat it fulfils the function thereof, these variants not being shown in the figures, for example at the opposite extremity of the shaft of the motor, if it disposes of dual output, or removing the brake (1 ) from the axial position of the shaft of the motor (30)/drum (33) by means of a deviated transmission.
  • This latter option presents the advantage that, by means of a multiplying or reducing transmission the speed in the brake may be increased such that the motor (30) does not rotate at high speeds in the case of emergency descent.
  • the magnets (6) may be contained (see fig. 5) in housings (60), wherein they do not generate eddy currents by virtue of being beyond the extent of the solid body (9), comprising means of thrusting the same towards operating positions (61 ) whereat they will be situated within said extent and will generate these currents.
  • Said means of thrusting may for example comprise a cam (62) actuated by a lever or other system of mechanical type.
  • Said means of deblocking comprise, for example, a unidirectional bearing (45) (utilised as anti-return device) which may be appreciated in fig. 2 located upon the rotor (1 1 ).
  • Said unidirectional bearing (45) may be conceptually similar to a bearing of rolling type, presenting the difference that the rotary movement between the two rings composing it is possible in solely one direction.
  • deblocking may be by clutch or by means of a manual system (for example a guillotine type lever) lowering the magnets to the position thereof in the case of need.
  • a manual system for example a guillotine type lever
  • these ideally comprise magnets of neodymium, although they may be of any type of permanent magnet.
  • this ideally comprises aluminium or copper, although it may be of any type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Braking Arrangements (AREA)

Abstract

La présente invention se rapporte à un frein (1) doté d'aimants permanents permettant de mettre à l'eau un équipement de sauvetage, caractérisé en ce qu'il comprend : - deux parties coaxiales présentant un mouvement de rotation relatif entre elles autour de l'arbre commun (4), - une première partie comprenant des aimants permanents (6) et - la seconde partie comprenant au moins un corps solide (9) de matériau paramagnétique adjacent auxdits aimants (6), de telle sorte qu'un déplacement relatif correspondant dans l'étendue des lignes d'un flux induit des courants de Foucault générant des forces s'opposant au mouvement relatif entre les deux parties.
PCT/EP2018/000128 2017-03-31 2018-03-28 Frein doté d'aimants permanents permettant de mettre à l'eau un équipement de sauvetage WO2018166654A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201700363 2017-03-31
ES201700363A ES2685287B1 (es) 2017-03-31 2017-03-31 Freno de imanes permanentes para lanzamiento de equipos salvavidas

Publications (1)

Publication Number Publication Date
WO2018166654A1 true WO2018166654A1 (fr) 2018-09-20

Family

ID=62044641

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/000128 WO2018166654A1 (fr) 2017-03-31 2018-03-28 Frein doté d'aimants permanents permettant de mettre à l'eau un équipement de sauvetage

Country Status (2)

Country Link
ES (1) ES2685287B1 (fr)
WO (1) WO2018166654A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102356431B1 (ko) * 2021-06-15 2022-02-08 길승환 자동 속도 조절이 가능한 중력 하강 레포츠 탑승 주행장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191212761A (en) * 1912-05-30 1912-12-05 Armstrong W G Whitworth & Co Improvements in Electric Boat Hoists.
GB833681A (en) * 1956-12-12 1960-04-27 George Mcqueen Improvements in or relating to lifeboat davits
US20070000741A1 (en) * 2005-06-30 2007-01-04 Pribonic Edward M Axial rotary eddy current brake with adjustable braking force
US20080105503A1 (en) * 2006-11-08 2008-05-08 Pribonic Edward M Axial rotary eddy current brake with self-adjustable braking force
WO2016089228A1 (fr) * 2014-12-04 2016-06-09 Eddy Current Limited Partnership Configurations de freins à courant de foucault

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2103023B (en) * 1981-07-09 1985-07-03 British Aerospace Damping device
JPS59217589A (ja) * 1983-05-26 1984-12-07 株式会社宮野鉄工所 緩降機
JPH0684239B2 (ja) * 1991-04-05 1994-10-26 株式会社日東鉄工所 ウインチドラム用ブレーキ
IT1396417B1 (it) * 2009-11-24 2012-11-23 Muratori Dispositivo magnetico di frenatura

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191212761A (en) * 1912-05-30 1912-12-05 Armstrong W G Whitworth & Co Improvements in Electric Boat Hoists.
GB833681A (en) * 1956-12-12 1960-04-27 George Mcqueen Improvements in or relating to lifeboat davits
US20070000741A1 (en) * 2005-06-30 2007-01-04 Pribonic Edward M Axial rotary eddy current brake with adjustable braking force
US20080105503A1 (en) * 2006-11-08 2008-05-08 Pribonic Edward M Axial rotary eddy current brake with self-adjustable braking force
WO2016089228A1 (fr) * 2014-12-04 2016-06-09 Eddy Current Limited Partnership Configurations de freins à courant de foucault

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102356431B1 (ko) * 2021-06-15 2022-02-08 길승환 자동 속도 조절이 가능한 중력 하강 레포츠 탑승 주행장치

Also Published As

Publication number Publication date
ES2685287A1 (es) 2018-10-08
ES2685287B1 (es) 2019-07-17

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