DK141481B - Propeller system with adjustable propeller blades. - Google Patents
Propeller system with adjustable propeller blades. Download PDFInfo
- Publication number
- DK141481B DK141481B DK142770AA DK142770A DK141481B DK 141481 B DK141481 B DK 141481B DK 142770A A DK142770A A DK 142770AA DK 142770 A DK142770 A DK 142770A DK 141481 B DK141481 B DK 141481B
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- DK
- Denmark
- Prior art keywords
- piston
- propeller
- propeller blades
- pressurized fluid
- servomotor
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
- B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
- B63H3/081—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft
- B63H3/082—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft the control element being axially reciprocatable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H3/00—Propeller-blade pitch changing
- B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
- B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
- B63H2003/088—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid characterised by supply of fluid actuating medium to control element, e.g. of hydraulic fluid to actuator co-rotating with the propeller
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Actuator (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Fluid-Pressure Circuits (AREA)
Description
(11) FREMLÆGGELSESSKRIFT 1 4 1 48 1 DANMARK <M) lnt.CI.3 B 63 H 3/08 (21) Ansøgning nr. 1427/70 (22) Irufleveret den 20. CISC’. 1970(11) PUBLICATION 1 4 1 48 1 DENMARK <M) lnt.CI.3 B 63 H 3/08 (21) Application No 1427/70 (22) Filed on the 20th CISC '. 1970
Mm (23) Løbedag 20. mør. 1970 ν' (44) Ansøgningen fremlagt og l o fremlæggelsesskriftet offentliggjort den 24. ΟΙΕΓ. 1980Mm (23) Race day 20. dark. 1970 ν '(44) The application submitted and the publication letter published on 24 ΟΙΕΓ. 1980
Dl REKTORATET FORDl THE RECTORATE FOR
PATENT-OG VAREMÆRKEVÆSENET (3°) Prioritet bøgeret fri denPATENT AND TRADEMARKET (3 °) Priority book free it
28. raar. 1969, 1511/^9, NO28. weird. 1969, 1511/9, NO
<71) A.M. LIAAEN A/s, Kjoepmannsgaten 25, 6000 Aaleeund, NO.<71) A.M. LIAAEN A / s, Kjoepmannsgaten 25, 6000 Aaleeund, NO.
(72) Opfinder: Anders M. Li aa en, Kjoepmannsgaten 25, 6000 Aalesund, NO.(72) Inventor: Anders M. Li aa and, Kjoepmannsgaten 25, 6000 Aalesund, NO.
(74) Fuldmægtig under sagens behandling:(74) Plenipotentiary in the proceedings:
Ingeniørfirmaet Lehmann & Ree.The engineering firm Lehmann & Ree.
(54) Propelleranlæg med indstillelige propellerblade.(54) Propeller system with adjustable propeller blades.
Opfindelsen angår et propelleranlæg med indstillelige propellerblade, særlig til søfartøjer af den type, hvor vinkelstillingen af de indstillelige propellerblade styres ved hjælp af en hydraulisk servomotor fra en trykfluidumkilde, f.eks. en pumpe, gerne med en lignende kilde i reserve. Servomotoren omfatter herunder sædvanligvis en stempelcylindermekanisme, hvis stempelstang er tilsluttet roden af hvert propellerblad, således at bladstillingen afhænger af stillingen af servomotorstemplet i dettes cylinder. Denne stilling bestemmes ved tilførsel af trykfluidum til de to sider af stemplet i dettes cylinder, og disse tilførsler bliver sædvanligvis styret ved hjælp af en fordelingsglider og foregår gennem aksiale ledninger i propellerakslen. Det er sædvanligt at anbringe servomotoren i akselledningen eller i selve propellernavet, herunder at indrette 2 141481 forholdene således, at en bevægelse af servomotorstemplet fremover i fartøjets længderetning vil bevirke en vridning af propellerbladene i retning af fremoverbevægelsen af fartøjet, men det er også muligt at indrette forholdene således, at fremoverstillingen af propellerbladene betinges af en bevægelse agterover af servomotorstemplet.The invention relates to a propeller system with adjustable propeller blades, in particular for marine vessels of the type in which the angular position of the adjustable propeller blades is controlled by means of a hydraulic servomotor from a pressurized fluid source, e.g. a pump, preferably with a similar source in reserve. The servomotor usually includes, among other things, a piston cylinder mechanism whose piston rod is connected to the root of each propeller blade so that the blade position depends on the position of the servomotor piston in its cylinder. This position is determined by supplying pressure fluid to the two sides of the piston in its cylinder, and these supplies are usually controlled by means of a distribution slider and pass through axial lines in the propeller shaft. It is customary to place the servo motor in the shaft line or in the propeller hub itself, including adjusting the conditions such that a forward movement of the servo motor piston in the longitudinal direction of the vessel will cause a rotation of the propeller blades in the direction of forward movement of the vessel, but it is also possible to adjust it. the conditions such that the forward position of the propeller blades is conditioned by a backward movement of the servomotor piston.
Som nævnt er det kendt at anvende en reservetrykfluidum-kilde for at sikre driften af servomotoren. Hvis der nemlig indtræder en fejl i tilførslen af trykfluidum, vil propellerbladene på grund af fartøjets bevægelse fremover gennem vandet søge at vride sig til en stilling til bevægelse agterover. Følgen er, at fartøjet mister sin manøvreringsevne, og det er derfor af afgørende betydning, at en svigten i tilførslen af trykfliudum kan undgås. Anvendelsen af en reservetryk-fluidumkilde vil afhjælpe en svigten i den ydre tilførsel. X tilfælde af, at der skulle indtræde en fejl umiddelbart i nærheden af eller i selve fordelingsglideren eller på grund af lækage i indføringsmekanismen, har der været foreslået og anvendt fjedermekanismer eller hydrauliske stempelmekanismer, som i tilfælde af fejl søger at bringe propellerbladene til at indtage en varig stilling til bevægelse fremover. De nævnte fjedermekanismer, som er indrettet til direkte mekanisk påvirkning af servomotoren, må nødvendigvis være udført temmeligt kraftige for at kunne overvinde både friktionen i de indre dele af propellernavet og den nævnte naturlige tendens til agteroverstilling af propellerbladene, samtidig med at de medfører den ulempe, at de kan påvirke den normale drift af propelleranlægget, medens de nævnte hydrauliske stempelmekanismer er udført med et specielt stempel for påvirkning af servomotorstemplet eller af stempelstangen.As mentioned, it is known to use a backup pressure fluid source to ensure the operation of the servomotor. If there is an error in the supply of pressure fluid, the propeller blades will, due to the movement of the vessel forward through the water, try to turn to a position for moving backwards. As a result, the vessel loses its maneuverability and it is therefore crucial that a failure in the supply of pressure fluid can be avoided. The use of a reserve pressure fluid source will alleviate the failure of the external supply. X in the event of an error occurring immediately near or in the distribution slider itself or due to leakage in the insertion mechanism, there have been proposed and used spring or hydraulic piston mechanisms which, in the event of failure, seek to cause the propeller blades to occupy a permanent position for moving forward. Said spring mechanisms adapted for direct mechanical influence of the servomotor must necessarily be designed to be strong enough to overcome both the friction in the inner parts of the propeller hub and the said natural tendency for rearward displacement of the propeller blades, while causing the disadvantage, that they may affect the normal operation of the propeller system while the said hydraulic piston mechanisms are provided with a special piston for actuation of the servomotor piston or of the piston rod.
Den foreliggende opfindelse angår et propelleranlæg med indstillelige propellerblade af den i indledningen til patentkrav 1 angivne art, hvor de mekaniske og funktionelle ulemper ved de kendte anlæg er undgået, og dette opnås ifølge opfindelsen ved de i krav l's kendetegnende del angivne foranstaltninger. Ved brug af et sådant anlæg vil servomotorstemplet således ved svigt hvor som helst i den ordinære tilførsel af trykfluidum kunne kobles over fra den sædvanlige trykfluidumskilde,eventuelt reservekilde, til en nødkilde, uafhængigt af de normale fordelings- og indføringsorganer, og servomotor- og indstillingsmekanismen vil fortsat funktionere på samme måde som under normal drift.The present invention relates to a propeller system with adjustable propeller blades of the kind set forth in the preamble of claim 1, where the mechanical and functional disadvantages of the prior art systems are avoided and this is achieved according to the invention by the features of claim 1. Thus, when using such a system, the servomotor piston can be switched from the usual pressurized fluid source, optionally backup source, to an emergency source, independently of the normal distribution and delivery means, in case of failure anywhere in the ordinary supply of pressurized fluid, and the servomotor and adjusting mechanism will continue to function in the same way as in normal operation.
Ifølge opfindelsen kan det yderligere stempel være forsynet med en hul stempelstang, som ved sin frie ende er åben mod den trykfluidumskanal, som svarer til den åbning, som kan lukkes, og med et aksialt gennemløb, som først åbnes, når åbningen er blevet lukket.According to the invention, the additional piston may be provided with a hollow piston rod open at its free end against the pressure fluid duct corresponding to the closable opening and with an axial passageway which is opened only when the opening has been closed.
141481 3141481 3
Til tilbageføring af det yderligere stempel til den stilling, det skal indtage under normal drift, kan det yderligere stempel ifølge opfindelsen på ydersiden af sin stempelstang være forsynet med en stempelflade i et rum i propellerakslen, som gennem langsgående spor er sluttet til den åbning, som skal kunne lukkes.To return the additional piston to the position it should occupy during normal operation, the additional piston according to the invention on the outside of its piston rod may be provided with a piston surface in a space in the propeller shaft which is connected through the longitudinal groove to the opening which must be closed.
For at sikre, at åbningen for den normale tilførsel af trykfluidum er lukket, før nødfluidum tilføres, er det hensigtsmæssigt at sørge for en faseforskydningsindretning, ved at det yderligere stempel er udformet med en central boring, som kan optage et cylindrisk fremspring på bunden i cylinderen til stemplet, idet længden af fremspringet og tykkelsen af stemplet er afpasset på en sådan måde i forhold til hinanden og til slaglængden af stemplet, at når stempelstangen har lukket åbningen til den første trykfluidumkiIde, er der gennemløb fra den anden trykfluidumkilde mellem den frie ende af fremspringet og den frie ende af boringen i stemplet til den kanal, som fører til servomotorens side for fremoverstilling af propellerbladene.In order to ensure that the opening for the normal supply of pressure fluid is closed before the emergency fluid is supplied, it is appropriate to provide a phase displacement device by the additional piston having a central bore capable of receiving a cylindrical projection on the bottom of the cylinder. to the plunger, the length of the projection and the thickness of the plunger being adjusted in such a way as to each other and to the stroke length of the plunger that when the plunger rod has closed the opening to the first pressurized fluid source, there is passage from the second pressurized fluid source between the free end of the plunger the projection and free end of the bore in the piston of the channel leading to the side of the servo motor for forward positioning of the propeller blades.
Når servomotorstemplet er bragt i stilling for fremovergang ved hjælp af en nødindstillingsmekanisme, f.eks. udformet i henhold til den foreliggende opfindelse, er det hensigtsmæssigt at kunne sikre servomotorstemplet i denne stilling, således at stemplet bliver stående i fuld fremoverstilling. Med dette formål for øje kan der i servo-motorcylinderen være anbragt en pakning, som i samvirkning med en af-faset omkredsflade på servomotorstemplet danner tætning mod en mulig forbindelse mellem de to sider af stemplet, når dette står i endestilling for fremoverstilling af propellerbladene. De sædvanlige stempelringe vil nemlig ikke holde helt tæt, således at stemplet vil kunne bevæge sig langsomt i sin cylinder, og det ville i så fald blive nødvendigt at foretage nødindstilling flere gange, hvilket selvsagt ikke er ønskeligt.When the servo motor piston is brought into position for advancement by means of an emergency setting mechanism, e.g. designed in accordance with the present invention, it is convenient to be able to secure the servo motor piston in this position so that the piston remains in full forward position. For this purpose, a gasket may be provided in the servo motor cylinder which, in cooperation with a beveled circumferential surface of the servo motor piston, seals against a possible connection between the two sides of the piston when this is in the end position for forward propeller blades. The usual piston rings will not hold quite tightly, so that the piston can move slowly in its cylinder and in that case it would be necessary to make emergency adjustments several times, which is obviously not desirable.
På vedlagte tegning er der skematisk vist to udførelsesformer for anlægget i henhold til opfindelsen, nemlig et hvor fremoverstilling af propellerbladene svarer til en bevægelse fremover af servomotorstemplet, og et hvor en sådan indstilling svarer til en bevægelse agterover af stemplet, idet fig. 1 viser et aksialt længdesnit gennem en del af den første udførelsesform for anlægget ifølge opfindelsen, nemlig en del af en propelleraksel, hvor trykfluidum bringes til og fra en servomotor, som styrer propellerbladstigningen, fig. 2 et aksialt snit gennem en anden del af anlægget, nemlig et propellernav, og som viser en venstre forsættelse af den akseldel, som er vist i fig. 1, 4 un 81 fig. 3 i større målestok en yderligere del af anlægget, nemlig den højre del af den akseldel, som er vist i fig. 1, fig. 4 ligeledes i aksialt snit en detaille af fig. 2, fig. 5 et snit svarende til fig. 1, men af en anden udførelsesform for anlægget ifølge opfindelsen, fig. 6 et snit svarende til fig. 2, men af den nævnte anden udførelsesform for opfindelsen, fig. 7 et snit svarende til fig. 3, men også af den anden udførelsesform, og fig. 8 et snit svarende til fig. 4, men af den anden udførelsesform.In the accompanying drawing, two embodiments of the system according to the invention are schematically illustrated, one in which the forward position of the propeller blades corresponds to a forward movement of the servomotor piston and one in which such a position corresponds to a rearward movement of the piston, fig. 1 shows an axial longitudinal section through part of the first embodiment of the system according to the invention, namely a part of a propeller shaft, in which pressure fluid is brought to and from a servo motor which controls the propeller blade pitch; FIG. 2 shows an axial section through another part of the system, a propeller hub, showing a left displacement of the shaft part shown in FIG. 1, 4 and 81 in FIG. 3 shows, on a larger scale, a further part of the system, namely the right part of the shaft part shown in FIG. 1, FIG. 4 also shows, in axial section, a detail of FIG. 2, FIG. 5 is a sectional view similar to FIG. 1, but of another embodiment of the system according to the invention; FIG. 6 is a sectional view similar to FIG. 2, but of the second embodiment of the invention, fig. 7 is a sectional view similar to FIG. 3, but also of the second embodiment, and fig. 8 is a sectional view similar to FIG. 4, but of the second embodiment.
I udførelsesformen, der er vist i fig. 5-8, er der anvendt de samme henvisningsbetegnelser som i fig. 1-4 for de dele, som svarer til hinanden, idet den eneste forskel mellem den første og den anden udførelsesform ligger i, at servomotorstemplet til den anden udførelsesform for anlægget bevæges agterover i stedet for fremover ved indstilling af propellerbladene til fremoverstilling.In the embodiment shown in FIG. 5-8, the same reference numerals as in FIG. 1-4 for the corresponding parts, the only difference between the first and second embodiments being that the servo motor piston for the second embodiment of the system is moved backwards instead of forward when adjusting the propeller blades for forward position.
Som vist på tegningen omfatter anlægget i de to udførelsesformer et propellernav 1, hvori der er anbragt et antal propellerblade 2, som kan drejes i navet 1 fra stillinger til bevægelse af fartøjet fremover til stillinger for bevægelse agterover og omvendt ved hjælp af en krydshovedmekanisme 3, hvis stilling styres ved hjælp af en servomotor, som er anbragt i propellernavet 1, og som omfatter en cylinder 4 med et stempel 5. Stillingen af stemplet 5 og dermed vinkelstillingen af propellerbladene 1 styres ved hjælp af et trykfluidum, som tilføres de to sider af stemplet 5 gennem rørledninger, som er anbragt i en hul aksel 6, fra en ydre trykfluidumkilde, som ikke er vist.As shown in the drawing, the system of the two embodiments comprises a propeller hub 1, in which are arranged a plurality of propeller blades 2, which can be rotated in the hub 1 from forward-moving positions to forward-moving positions and vice versa by means of a cross-head mechanism 3, the position of which is controlled by a servo motor located in the propeller hub 1, which comprises a cylinder 4 with a piston 5. The position of the piston 5 and thus the angular position of the propeller blades 1 is controlled by a pressure fluid supplied to the two sides of the the plunger 5 through pipelines located in a hollow shaft 6 from an external pressure fluid source not shown.
På et cylinderformet parti 7 af akslen 6 drejer denne sig frit i et faststående fluidumindføringshus 8, hvori der er anbragt en glider 9, som kan forskydes i aksial retning. Huset 8 er forsynet med en åbning 10 til indføring af trykfludium og to åbninger 11 til udtagning af dette fluidum til en sump. Huset 8 er yderligere udformet med åbninger 12 og 13 til ledning af trykfluidum til hver sin side af servomotorstemplet 5 gennem ledninger, som er anbragt i akslen 6 dels ved hjælp af et rør 14, dels ved hjælp af et rør 15, som er anbragt centralt og aksialt i en central boring i akslen 6.On a cylindrical portion 7 of the shaft 6, it rotates freely in a fixed fluid insertion housing 8 in which is arranged a slider 9 which can be displaced in the axial direction. The housing 8 is provided with an opening 10 for introducing pressure fluid and two openings 11 for withdrawing this fluid into a sump. The housing 8 is further provided with openings 12 and 13 for conduction of pressure fluid to each side of the servomotor piston 5 through conduits arranged in the shaft 6 partly by means of a pipe 14 and partly by means of a pipe 15 which is centrally arranged. and axially in a central bore of the shaft 6.
Glideren 9 styres på konventionel måde under anvendelse af en tilbageføringsmekanisme, som omfatter en ring 16, som er tilsluttet stænger 17, der er fæstnet til et åg 18 på røret 14, hvis agterste 141481 5 (venstre) ende er fæstnet til en hul stempelstang 20 til stemplet 5, og hvis forreste (højre) ende kan glide tæt i boringen i akslen 6.The slider 9 is controlled in a conventional manner using a return mechanism which includes a ring 16 connected to rods 17 attached to a yoke 18 on the tube 14, the rear (left) end of which is attached to a hollow piston rod 20 to the piston 5 and whose front (right) end can slide tightly in the bore of the shaft 6.
Det er stempelstangen 20, der bevæger krydshovedet 3 til indstilling af propellerbladene 1.It is the piston rod 20 which moves the crosshead 3 to adjust the propeller blades 1.
Den del af anlægget, der er beskrevet ovenfor, udgør ikke nogen del af den foreliggende opfindelse.The part of the system described above does not form part of the present invention.
I anlægget i henhold til fig. 1-4, er boringen i akslen 6 udformet med et udvidet parti 21, som strækker sig forfra (fra højre) til et sted mellem indløbsåbningerne 12 og 13. Partiet 21 er lukket i forhold til den smallere del af boringen mellem åbningerne 12 og 13 ved hjælp af en ring 22, som er udformet med en åbning 220, som modsvarer åbningen 13 i huset 8. Ringen 22 har en central åbning til tætnende gennemføring af røret 15, som ender åbent foran (til tøjre for) ringen 22.In the system according to FIG. 1-4, the bore of the shaft 6 is formed with an extended portion 21 extending from the front (from the right) to a location between the inlet openings 12 and 13. The portion 21 is closed relative to the narrower portion of the bore between the openings 12 and 13. by means of a ring 22, which is formed with an opening 220 which corresponds to the opening 13 in the housing 8. The ring 22 has a central opening for sealing penetration of the pipe 15 which ends open in front (to the tether of) the ring 22.
Den forreste del af boringen 21 er udformet med et parti 23 med lidt større diameter, og som er lukket i en flange 24 på den højre ende af akslen 6 ved hjælp af en plade 25, som er forsynet med et centralt hylsterformet fremspring 251, som rager agterud fra pladen 25, og som har en affaset endeflade 252.The front portion of the bore 21 is formed with a portion 23 of slightly larger diameter and which is closed in a flange 24 on the right end of the shaft 6 by means of a plate 25 provided with a central casing-shaped projection 251 which protruding rearwardly from plate 25 and having a bevelled end surface 252.
I partiet 23 i boringen 21 er der anbragt et flydende stempel 26 med en hul stempelstang 27, hvoraf en forreste tykkere del 271 kan forskydes tætnende i en faststående foring 28 i boringen 21, og hvis agterste, tyndere del 272 kan forskydes tætnende inde i en cylinderformet forlængelse 221 på ringen 22. I denne forlængelse er der anbragt aksiale spor 222, således at rummet i boringen 21 rundt om stempelstangen 27 står i forbindelse med boringen 13, d.v.s. at der fra boringen 13 i den stilling af stemplet 26, som er vist øverst i fig. 3, flyder fluidum fra åbningen 13 ind i boringen 21 både indvendigtog udvendigt i forhold til stempelstangen 27.In the portion 23 of the bore 21, a floating piston 26 is provided with a hollow piston rod 27, of which a front thicker portion 271 may be sealingly sealed in a fixed liner 28 of the bore 21, and the trailing, thinner portion 272 may be sealed sealingly within a cylindrical extension 221 on the ring 22. In this extension, axial grooves 222 are arranged so that the space in the bore 21 around the piston rod 27 communicates with the bore 13, i.e. that from the bore 13 in the position of the piston 26 shown at the top of FIG. 3, fluid flows from the opening 13 into the bore 21 both internally and externally relative to the piston rod 27.
Længden af fremspringet 251 på skiven 25 er valgt således i forhold til slaglængden af stenplet 26,27, at når stempelstangen 27 står mod ringen 22 i sin agterste venstre stilling, vil der være frit gennemløb forbi kanten 252 mellem rummet på forsiden af stemplet 26 og hulrummet i stempelstangen 27.The length of the protrusion 251 of the disc 25 is chosen so as to the stroke of the stain 26,27 that when the piston rod 27 is against the ring 22 in its trailing left position, there will be free passage past the edge 252 between the space at the front of the piston 26 and the cavity in the piston rod 27.
I forbindelsesflangen 24 ved den forreste (højre) ende af propellerakslen 6 er der anbragt en radial boring 29, hvis yderste ende har et gevind 291. Under normal drift er boringen 29 lukket ved hjælp af en stift 292, som er forsynet med et gevindskåret hoved 293 og med en luftboring 294.In the connecting flange 24 at the front (right) end of the propeller shaft 6, a radial bore 29 is provided, the outermost end of which has a thread 291. During normal operation, the bore 29 is closed by a pin 292 provided with a threaded head 293 and with an air bore 294.
I den forreste stilling af stemplet 26 munder boringen 29 ind i rummet 23 på forsiden af stemplet 26.In the forward position of the piston 26, the bore 29 opens into the space 23 at the front of the piston 26.
6 UU81 I flangen 24 er der også anbragt en luftboring 31, som munder ind i rummet 23 på agtersiden af stemplet 26, og som kan lukkes ved hjælp af en prop 32 i flangen 24.In the flange 24 there is also arranged an air bore 31 which opens into the space 23 on the rear of the piston 26 and which can be closed by a plug 32 in the flange 24.
I den forreste ende af servomotorcylinderen 4 er der som vist i større målestok i fig. 4 anbragt en U-pakning 30, og den forreste ende af stemplet 5 er affaset ved 51. Den ene læbe 301 på pakningen 30 rager lidt ind i det frie rum i cylinderen 4, således at den vil gå i indgreb med stemplet 5 rundt om den affasede ende af dette, når stemplet bevæges til en forreste bundstilling, og glide op på omkredsfladen af stemplet 5.At the front end of the servo motor cylinder 4, as shown on a larger scale in FIG. 4, a U-pack 30 is provided, and the front end of the plunger 5 is bevelled at 51. One lip 301 of the pack 30 projects slightly into the free space of the cylinder 4 so that it will engage the plunger 5 around it. the beveled end thereof as the piston moves to a front bottom position, and slide up on the circumferential surface of the piston 5.
I den udførelsesform for anlægget i henhold til opfindelsen, som er vist i fig. 5-8, er forholdene som nævnt således, at servomotorstemplet 5 bevæges agterover, mod venstre på tegningen i dens cylinder 4 ved indstilling af propellerbladene til fremoverstil-ling. Pakningen 30 og den affasede ende 51 af stemplet er følgelig her anbragt i den agterste, venstre ende af cylinderen 4. Anbringelsen af hjælpestemplet 26 er følgelig også vendt i forhold til den anbringelse, som er vist i fig. 1-4, idet det er anbragt i den agterste, venstre tilslutningsflange 24' på akslen 6 i stedet for i den højre flange 24.In the embodiment of the system according to the invention shown in FIG. 5-8, the conditions as mentioned are such that the servomotor piston 5 is moved rearward, to the left of the drawing in its cylinder 4, by adjusting the propeller blades for forward position. Accordingly, the gasket 30 and the beveled end 51 of the piston are disposed here at the rear left end of the cylinder 4. The positioning of the auxiliary piston 26 is consequently also reversed relative to the position shown in FIG. 1-4, being disposed in the rear left connecting flange 24 'of the shaft 6 instead of the right flange 24.
I dette tilfælde er det følgeligt forbindelsen mellem røret 14 og åbningen 12, der skal lukkes og erstattes med en forbindelse til en nødkilde gennem boringen 29. Konstruktivt medfører denne ændrede anbringelse, at røret 14 har en tætnende styring indvendigt i fremspringet 251, medens røret 15 også her er tætnende styret i ringen 22.Accordingly, in this case, it is the connection between the pipe 14 and the opening 12 that must be closed and replaced by a connection to an emergency source through the bore 29. Constructively, this changed arrangement causes the pipe 14 to have a sealing guide internally in the projection 251 while the pipe 15 here, too, sealing is controlled in the ring 22.
De øvrige detailler i denne udførelsesform svarer helt til detaillerne i udførelsesformen, som er vist i figurerne 1-4, og som er beskrevet ovenfor.The other details of this embodiment are fully similar to the details of the embodiment shown in Figures 1-4 and described above.
Anlægget i henhold til opfindelsen virker på følgende måde:The plant according to the invention works as follows:
Under normal drift er åbningerne 12 og 13 tilsluttet en trykfluidumkilde, og ved passende forskydning af glideren 9 kan sådant fluidum føres til for- eller bagsiden af servomotorstemplet 5 til indstilling af propellerbladene 2 i retning til agterovergang, henholdsvis fremovergang. Under sådan normal drift fungerer anlægget på en måde, som er velkendt, således at nærmere beskrivelse af anlægget og dets funktioner er unødvendig for en fagmand.In normal operation, the openings 12 and 13 are connected to a pressure fluid source and, by appropriate displacement of the slide 9, such fluid can be fed to the front or back of the servomotor piston 5 for adjusting the propeller blades 2 in the direction of stern and forward respectively. During such normal operation, the plant operates in a manner well known in the art, so that further description of the plant and its functions is unnecessary for one skilled in the art.
Hvis der nu skulle indtræffe et uheld i forbindelse med indføringshuset 8 eller tilførslen af trykfluidum fra hoved- eller reservekilden, vil propellerbladene have en tendens til at dreje sig til en stilling for bevægelse agterover, således at fartøjet vil miste sin manøvreringsevne.Should an accident occur now in connection with the introducer housing 8 or the supply of pressure fluid from the main or reserve source, the propeller blades will tend to rotate to a position of movement backwards, so that the vessel will lose its maneuverability.
Denne ulempe er afhjulpet ved hjælp af anlægget i henhold til opfindelsen på følgende måde: 141481 7This disadvantage is remedied by the device according to the invention as follows:
Stiften 292 skrues ud af sin boring 29, og i gevindet 291 indskrues der en slange, som er tilsluttet en vilkårlig trykfluidum-kilde. Samtidig åbnes boringen 31, ved at proppen 32 fjernes.The pin 292 is unscrewed from its bore 29, and threaded 291 is screwed into a hose connected to any pressure fluid source. At the same time, bore 31 is opened by removing plug 32.
Ved nu at føre trykfluidum ind gennem boringen 29 forskydes stemplet 26 mod venstre i fig. 3 og mod højre i fig. 7, således at det vil indtage den stilling, som er vist nederst i fig. 3, henholdsvis fig. 7, med stempelstangen 27 i stilling mod ringen 22. Derved lukkes forbindelsen mellem åbningen 13, henholdsvis 12, og rummet inde i stempelstangen 27 og dermed med røret 15, henholdsvis 14, medens der bliver frit gennemløb fra boringen 29, rummet ved den frie side af stemplet 26, spalten mellem boringen i stemplet 26 og enden af fremspringet 252, hulrummet i stempelstangen 27, røret 15, henholdsvis 14 til agtersiden, henholdsvis forsiden af servomotorstemplet 5, således at dette forskydes, således at propellerbladene 2 drejes til fuld fremover-stilling.By now passing pressure fluid through the bore 29, the plunger 26 is displaced to the left in FIG. 3 and to the right in FIG. 7 so that it will occupy the position shown at the bottom of FIG. 3 and FIG. 7, with the piston rod 27 in position against the ring 22. This closes the connection between the opening 13 and 12, respectively, and the space inside the piston rod 27 and thus with the pipe 15 and 14, respectively, while allowing free passage from the bore 29, the space at the free side. of the piston 26, the gap between the bore of the piston 26 and the end of the projection 252, the cavity of the piston rod 27, the pipe 15, 14 respectively to the rear, and the front respectively of the servomotor piston 5, so that it is displaced so that the propeller blades 2 are rotated to full forward position. .
Cylinderen 4 og den normale indstillingsmekanisme er herunder dimensioneret således i forhold til hinanden, at stemplet 5 under normal drift ikke vil nå sine yderste stillinger i cylinderen 4.The cylinder 4 and the normal setting mechanism are dimensioned below each other so that during normal operation the piston 5 will not reach its outermost positions in the cylinder 4.
Ved påvirkning af trykfluidum gennem boringen 29 vil stemplet 5 imidlertid bevæges til sin yderste forreste, henholdsvis agterste stilling, hvor læben 301 på pakningen 30 vil gå i indgreb med den affasede del 51 på stemplet 5 og lægge sig mod den cylindriske omkredsflade. Derved forhindres det, at der i denne endestilling af stemplet 5 vil opstå nogen lækage af trykfluidum fra agtersiden af stemplet 5 med deraf følgende tendens for stemplet 5 til at glide langsomt agterover. Med stemplet 5 stående i denne ekstreme stilling og dermed propellerbladene 2 i ekstrem fremoverstilling fjernes igen tilførslen af trykfluidum gennem boringen 29, og denne lukkes med en tæt prop eller en kontraventil.However, upon impact of pressure fluid through the bore 29, the piston 5 will move to its outermost forward or aft position, respectively, where the lip 301 of the gasket 30 will engage the beveled portion 51 of the piston 5 and lie against the cylindrical circumferential surface. This prevents in this end position of the piston 5 any leakage of pressure fluid from the back of the piston 5 with the resulting tendency for the piston 5 to slide slowly backwards. With the piston 5 standing in this extreme position and thus the propeller blades 2 in the extreme forward position, the supply of pressure fluid is again removed through the bore 29, and this is closed with a tight plug or a check valve.
Propellerbladene 2 står nu i en ekstrem fremoverstilling. Fartøjet er ligeså fuldt manøvredygtigt scan et fartøj med fast propellerbladstilling, og manøvreringen kan foregå ved hjælp af fremdriftsmaskinen på ordinær måde.The propeller blades 2 are now in an extreme forward position. The vessel is also fully maneuverable to scan a vessel with a fixed propeller blade position, and the maneuvering can be carried out using the propulsion machine in the usual way.
Når fejlen i den normale tilførsel af trykfluidum er afhjulpet, fjernes proppen i boringen 29 igen, og tryk sættes igen på gennem åbningen 13, henholdsvis 12. Dette tryk vil forplante sig gennem sporene 222 og påvirke den flade 273, som begrænser den tykkeste del 271 af stempelstangen 27 i forhold til den tyndere del 272, aåledes at stemplet 26 vil trykkes mod fremoverstillingen,indtil det igen indtager den stilling, som er vist øverst i fig. 3 og fig. 7, og normal drift-When the error in the normal supply of pressure fluid is rectified, the plug in bore 29 is removed again and pressure is applied again through the opening 13 and 12. This pressure will propagate through the grooves 222 and affect the surface 273 which limits the thickest part 271. of the piston rod 27 relative to the thinner portion 272 so that the piston 26 will be pressed against the forward position until it again occupies the position shown at the top of FIG. 3 and FIG. 7, and normal operation
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO131169 | 1969-03-28 | ||
| NO1311/69A NO123595B (en) | 1969-03-28 | 1969-03-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK141481B true DK141481B (en) | 1980-03-24 |
| DK141481C DK141481C (en) | 1980-09-29 |
Family
ID=19878116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK142770AA DK141481B (en) | 1969-03-28 | 1970-03-20 | Propeller system with adjustable propeller blades. |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3640644A (en) |
| JP (1) | JPS4940184B1 (en) |
| DE (1) | DE2012575C2 (en) |
| DK (1) | DK141481B (en) |
| FI (1) | FI48331C (en) |
| FR (1) | FR2039916A5 (en) |
| GB (1) | GB1293206A (en) |
| NL (1) | NL166891C (en) |
| NO (1) | NO123595B (en) |
| PL (1) | PL71504B1 (en) |
| SE (1) | SE376210B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1384383A (en) * | 1971-08-26 | 1975-02-19 | Lips Nv | Variable pitch propeller with emergency control |
| US4352634A (en) * | 1980-03-17 | 1982-10-05 | United Technologies Corporation | Wind turbine blade pitch control system |
| DE3415428A1 (en) * | 1984-04-25 | 1985-10-31 | Liebherr-Aero-Technik Gmbh, 8998 Lindenberg | Adjusting drive for adjustment of the setting angle of one or more rotor blades |
| US4671737A (en) * | 1984-12-26 | 1987-06-09 | Sundstrand Corporation | Blade pitch changing mechanism |
| US4781533A (en) * | 1986-09-30 | 1988-11-01 | Kamewa Ab | Control system for propeller with controllable pitch |
| GB8723246D0 (en) * | 1987-10-03 | 1987-11-04 | Dowty Rotol Ltd | Bladed rotor assemblies |
| SE503426C2 (en) * | 1993-12-17 | 1996-06-10 | Motala Verkstad Ab | Device for propeller drives for marine vehicles |
| EP2444316B1 (en) * | 2010-10-25 | 2016-02-17 | MT-Propeller Entwicklung GmbH | Hydraulic variable pitch propeller |
| CN109163890B (en) * | 2018-07-10 | 2020-12-25 | 武汉船用机械有限责任公司 | Method for monitoring working state of controllable pitch propeller |
| CN111486331B (en) * | 2020-04-14 | 2021-08-06 | 南京高精船用设备有限公司 | Forced lubrication cooling's epaxial oil distributor structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD63709A (en) * | ||||
| US2312686A (en) * | 1941-09-24 | 1943-03-02 | John Eley Jr | Emergency cut-over valve |
| US2693243A (en) * | 1952-07-23 | 1954-11-02 | John H Strandell | Double crank controllable pitch propeller |
| US2802453A (en) * | 1953-08-13 | 1957-08-13 | Lockheed Aircraft Corp | Hydraulic transfer valve |
| GB785766A (en) * | 1955-05-05 | 1957-11-06 | Rotol Ltd | Improvements in hydraulic variable pitch propellers |
| US2830668A (en) * | 1956-11-01 | 1958-04-15 | United Aircraft Corp | Hydraulic system for an aeronautical propeller |
| GB901800A (en) * | 1959-09-09 | 1962-07-25 | Hindmarch Thomas | Improvements in or relating to hydraulically operated variable pitch marine screw propellers |
-
1969
- 1969-03-28 NO NO1311/69A patent/NO123595B/no unknown
-
1970
- 1970-03-17 DE DE2012575A patent/DE2012575C2/en not_active Expired
- 1970-03-17 SE SE7003522A patent/SE376210B/xx unknown
- 1970-03-18 PL PL1970139475A patent/PL71504B1/pl unknown
- 1970-03-20 DK DK142770AA patent/DK141481B/en unknown
- 1970-03-23 FI FI700818A patent/FI48331C/en active
- 1970-03-24 FR FR7010536A patent/FR2039916A5/fr not_active Expired
- 1970-03-25 GB GB04426/70D patent/GB1293206A/en not_active Expired
- 1970-03-26 NL NL7004405.A patent/NL166891C/en not_active IP Right Cessation
- 1970-03-27 US US23172A patent/US3640644A/en not_active Expired - Lifetime
- 1970-03-28 JP JP45025660A patent/JPS4940184B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL7004405A (en) | 1970-09-30 |
| US3640644A (en) | 1972-02-08 |
| NO123595B (en) | 1971-12-13 |
| JPS4940184B1 (en) | 1974-10-31 |
| FI48331C (en) | 1974-09-10 |
| DE2012575A1 (en) | 1971-02-11 |
| SE376210B (en) | 1975-05-12 |
| NL166891C (en) | 1981-10-15 |
| PL71504B1 (en) | 1974-06-29 |
| DK141481C (en) | 1980-09-29 |
| FR2039916A5 (en) | 1971-01-15 |
| NL166891B (en) | 1981-05-15 |
| DE2012575C2 (en) | 1983-11-17 |
| FI48331B (en) | 1974-05-31 |
| GB1293206A (en) | 1972-10-18 |
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