US3594099A - Pitch adjustment in screw-bladed devices, such as propellers - Google Patents

Pitch adjustment in screw-bladed devices, such as propellers Download PDF

Info

Publication number
US3594099A
US3594099A US819255A US3594099DA US3594099A US 3594099 A US3594099 A US 3594099A US 819255 A US819255 A US 819255A US 3594099D A US3594099D A US 3594099DA US 3594099 A US3594099 A US 3594099A
Authority
US
United States
Prior art keywords
boss
blade
holes
blades
pitch
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.)
Expired - Lifetime
Application number
US819255A
Other languages
English (en)
Inventor
Colin Wray Herbert
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.)
Federal Mogul Engineering Ltd
Original Assignee
Glacier Metal Co Ltd
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 Glacier Metal Co Ltd filed Critical Glacier Metal Co Ltd
Application granted granted Critical
Publication of US3594099A publication Critical patent/US3594099A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/12—Propeller-blade pitch changing the pitch being adjustable only when propeller is stationary

Definitions

  • Att0rneyWoodcock, Washburn, Kurtz, & Mackiewicz ABSTRACT A propeller having a boss to which are bolted fixed blades which can be located at the required pitch by means of dowels engaging in pairs of registering holes in the boss and the blade root, a number of different sets of holes being provided to give different pitch settings.
  • the present invention relates to screw-bladed devices such as propellers, propeller fans and bladed screw pumps and especially to marine propellers.
  • the pitch is selected during the design stage and is detennined, amongst other factors, by a prediction of the actual speed of the water flowing to the propeller. This latter is estimated from the performance of similar vessels or from the results of model experiments, and errors in the value selected can occur which lead to the propeller pitch being slightly inaccurate. Such slight variations can efiect the ability of the propeller to absorb its designed delivered horsepower at the correct revolutions and result in less than optimum performance.
  • propellers of nominally fixed pitch type can be manufactured with separately attached blades provided with flanges at their roots for attachment to the propeller boss by means of bolts and in such propellers it is common to elongate the holes in the blade root flanges so that the pitch may be adjusted by slackening the bolts and rotating the blades slightly in relation to the propeller boss.
  • a screw-bladed device having blades detachably attached to a boss wherein for adjustment of the pitch of a blade a plurality of pairs of holes are provided in contacting faces of the blade and boss, the holes of the various pairs being arranged to be in register at different angular positions of the blade and a dowel being fitted in a registering pair of holes to establish the pitch of the blade.
  • each pitch position there may be a number of pairs of registering holes each fitted with a dowel.
  • the dowel or dowels resist rotation of the blade from the required pitch position and are assisted in this by the friction between the contacting faces resulting from the pressure due to the bolts or other devices securing the blade to the boss.
  • each blade has an annular flange at its root which is bolted to a mounting flange on the propeller boss.
  • the dowel holes are located in the required angular relationships in the blade root flange and the propeller boss flange.
  • FIG. 1 is a plan view of a recess in the propeller boss with the propeller blade flange superimposed
  • FIG. 2 is a section on the line A-A of FIG. 1.
  • a propeller boss has a recess 11 for the reception of a flange 12 of a blade 13.
  • the recess 11 has a central spigot 14 engaging a recess 15 in the blade root.
  • Seals 16 are located around the periphery of the blade flange 12.
  • the blade flange 12 is secured to the boss by bolts received in boltholes 17 in the boss 10.
  • the holes in the blade flange through which the securing bolts pass (which are not shown in the drawing) are elongated to allow limited rotation of the blade for pitch adjustment.
  • the possible pitch positions are determined by six holes 18 in the propeller boss 10 and six associated holes 19 in the blade flange 12. Each pair of holes 18 and 19 requires a different angular position of the blade 13 to bring the two holes into register. When the holes of the selected pair are in register a dowel 20 is inserted to establish that pitch position. Subsequent tightening of the securing bolts produces a functional resistance to rotation of the blade due to the pressure between the contacting faces of the blade flange 12 and the recess 11.
  • gauging arrangement may be incorporated to facilitate visual confirmation of the pitch location when the parts are assembled.
  • a screw-bladed device comprising a boss, a plurality of blades, contacting faces on each of said blades and said boss, means detachably securing each of said blades to said boss with said contacting faces of said blades and said boss in engagement, a plurality of holes in each of said contacting faces, said holes being arranged in pairs in said contacting faces, one hole of each pair being in one set of said blades and the other hole of each pair being in said boss, the holes of the various pairs being arranged to be in register at different angular positions of the blade, and a plurality of dowels corresponding in number to said blades, one of said dowels being fitted in a registering pair of holes of each of said contacting faces of said blades and said boss to establish the pitch of each of the blades.
  • a device as claimed in claim 1 having for each pitch position of each blade at least one further pair of registering holes, and having a further dowel fitted in the further registering pair of holes corresponding to the established pitch of each blade.
  • each blade has an annular flange at its root and the boss has a mounting flange for each blade flange, said securing means comprising bolts fixing said blade flanges to said mounting flanges on said boss.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US819255A 1968-04-29 1969-04-25 Pitch adjustment in screw-bladed devices, such as propellers Expired - Lifetime US3594099A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2025868 1968-04-29

Publications (1)

Publication Number Publication Date
US3594099A true US3594099A (en) 1971-07-20

Family

ID=10143012

Family Applications (1)

Application Number Title Priority Date Filing Date
US819255A Expired - Lifetime US3594099A (en) 1968-04-29 1969-04-25 Pitch adjustment in screw-bladed devices, such as propellers

Country Status (9)

Country Link
US (1) US3594099A (enrdf_load_stackoverflow)
DE (1) DE1921337B2 (enrdf_load_stackoverflow)
DK (1) DK130185B (enrdf_load_stackoverflow)
ES (1) ES366550A1 (enrdf_load_stackoverflow)
FR (1) FR2007247A1 (enrdf_load_stackoverflow)
GB (1) GB1250485A (enrdf_load_stackoverflow)
NL (1) NL6906504A (enrdf_load_stackoverflow)
NO (1) NO131061C (enrdf_load_stackoverflow)
SE (1) SE383713B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256435A (en) * 1978-08-02 1981-03-17 Eckel Oliver C Mounting support blocks for pivotal rotor of wind turbine
US4692097A (en) * 1985-06-26 1987-09-08 Fonderie Musil Propeller with removable and adjustable blades
US20090252614A1 (en) * 2005-12-28 2009-10-08 Lm Glasfiber A/S Levelling of Root Bushings on Blades for Wind Turbines
US7736127B1 (en) * 2009-01-28 2010-06-15 Carr Fred K Rotor design for submersible electronic generator
US20100187826A1 (en) * 2009-01-28 2010-07-29 Carr Fred K Submersible rotor design
JP5997408B1 (ja) * 2016-04-27 2016-09-28 川崎重工業株式会社 舶用プロペラ
US20170241396A1 (en) * 2016-02-18 2017-08-24 Andritz Hydro Gmbh Pelton runner
WO2017187746A1 (ja) * 2016-04-27 2017-11-02 川崎重工業株式会社 舶用プロペラ

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125436C1 (en) * 1991-08-01 1993-02-11 Peter Adliswil Ch Mueller Propeller with detachable blades - has feet on blades bolting onto depressions in hub and includes streamline sleeve for hub
DE19755825C1 (de) 1997-12-16 1999-02-18 Peter Mueller Propeller mit einstellbarer Flügelsteigung, insbes. für Sportboote
DE102006041349A1 (de) * 2006-09-01 2008-03-06 Tlt-Turbo Gmbh Reversierfähiges Laufrad
DE102011013546A1 (de) * 2011-03-10 2012-09-13 Voith Patent Gmbh Axialturbine für ein Gezeitenkraftwerk und Verfahren für deren Montage
ES2988227A1 (es) * 2023-04-28 2024-11-19 Gonzalez Abal Pablo Alfonso Hélice para embarcaciones

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US794010A (en) * 1904-10-13 1905-07-04 William B Hayden Propeller.
GB367265A (en) * 1930-07-30 1932-02-18 Sulzer Ag Improvements in or relating to the rotors of axial flow pumps and the like
US3123145A (en) * 1964-03-03 Propeller with selectively variable pitch
US3231022A (en) * 1964-03-09 1966-01-25 Buffalo Forge Co Axial fan construction
US3324953A (en) * 1964-10-29 1967-06-13 Airscrew Weyroc Ltd Fan rotors
US3357496A (en) * 1966-07-28 1967-12-12 Westinghouse Electric Corp Adjustable pitch axial flow fan blades

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123145A (en) * 1964-03-03 Propeller with selectively variable pitch
US794010A (en) * 1904-10-13 1905-07-04 William B Hayden Propeller.
GB367265A (en) * 1930-07-30 1932-02-18 Sulzer Ag Improvements in or relating to the rotors of axial flow pumps and the like
US3231022A (en) * 1964-03-09 1966-01-25 Buffalo Forge Co Axial fan construction
US3324953A (en) * 1964-10-29 1967-06-13 Airscrew Weyroc Ltd Fan rotors
US3357496A (en) * 1966-07-28 1967-12-12 Westinghouse Electric Corp Adjustable pitch axial flow fan blades

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256435A (en) * 1978-08-02 1981-03-17 Eckel Oliver C Mounting support blocks for pivotal rotor of wind turbine
US4692097A (en) * 1985-06-26 1987-09-08 Fonderie Musil Propeller with removable and adjustable blades
US7966726B2 (en) * 2005-12-28 2011-06-28 Lm Glasfiber A/S Levelling of root bushings on blades for wind turbines
US20090252614A1 (en) * 2005-12-28 2009-10-08 Lm Glasfiber A/S Levelling of Root Bushings on Blades for Wind Turbines
US8100648B2 (en) * 2009-01-28 2012-01-24 Carr Fred K Submersible rotor design
US20100187826A1 (en) * 2009-01-28 2010-07-29 Carr Fred K Submersible rotor design
US7736127B1 (en) * 2009-01-28 2010-06-15 Carr Fred K Rotor design for submersible electronic generator
US20170241396A1 (en) * 2016-02-18 2017-08-24 Andritz Hydro Gmbh Pelton runner
US10550821B2 (en) * 2016-02-18 2020-02-04 Andritz Hydro Gmbh Pelton runner
JP5997408B1 (ja) * 2016-04-27 2016-09-28 川崎重工業株式会社 舶用プロペラ
WO2017187746A1 (ja) * 2016-04-27 2017-11-02 川崎重工業株式会社 舶用プロペラ
KR20190015223A (ko) * 2016-04-27 2019-02-13 카와사키 주코교 카부시키 카이샤 선박용 프로펠러
KR102043351B1 (ko) 2016-04-27 2019-11-12 카와사키 주코교 카부시키 카이샤 선박용 프로펠러

Also Published As

Publication number Publication date
GB1250485A (enrdf_load_stackoverflow) 1971-10-20
DE1921337A1 (de) 1970-01-22
NO131061B (enrdf_load_stackoverflow) 1974-12-23
DK130185B (da) 1975-01-13
ES366550A1 (es) 1971-01-01
FR2007247A1 (enrdf_load_stackoverflow) 1970-01-02
DE1921337B2 (de) 1974-09-19
NO131061C (enrdf_load_stackoverflow) 1976-04-28
DK130185C (enrdf_load_stackoverflow) 1975-06-16
NL6906504A (enrdf_load_stackoverflow) 1969-10-31
SE383713B (sv) 1976-03-29

Similar Documents

Publication Publication Date Title
US3594099A (en) Pitch adjustment in screw-bladed devices, such as propellers
US2011821A (en) Propeller wheel
US2498170A (en) Propeller blades
US9011100B2 (en) Demountable propeller
GB1209786A (en) Stern constructions for marine vessels having propellers with detachable blades
US3567336A (en) Propellers
GB124012A (en) Improvements in and relating to the Driving of Ships, Boats, Windmills, Flying Machines and the like.
US675477A (en) Propeller.
US3412809A (en) Marine propellers
US3003458A (en) Inboard boat propulsion and steering assembly
US3740165A (en) Marine propeller
ES195228U (es) Una disposicion de una tobera anular que rodea a una helice de buque.
US3422905A (en) Indirect driven propeller
US2939536A (en) Hub structure for an aeronautical propeller
GB520984A (en) Improvements in or relating to the propulsion of air and marine craft
US2986111A (en) Marine propeller hub of special gradually increasing diameter and combination thereof with a tubular rudder
GB1145237A (en) Hydraulic jet propulsion apparatus
SU135778A1 (ru) Устройство дл испытани главной судовой установки на швартовых
US184092A (en) Improvement in screw-propellers
US3640071A (en) Ducted propeller systems for marine vessels
GB189921492A (en) Improvements in or relating to Propellers for Vessels.
US386966A (en) conrad
US4111A (en) Hubbell
GB190602470A (en) Improvements in Submerged Feathering Paddle Wheels
US226466A (en) Screw-propeller