GB1341473A - Controllable pitch propeller - Google Patents

Controllable pitch propeller

Info

Publication number
GB1341473A
GB1341473A GB2185671A GB2185671A GB1341473A GB 1341473 A GB1341473 A GB 1341473A GB 2185671 A GB2185671 A GB 2185671A GB 2185671 A GB2185671 A GB 2185671A GB 1341473 A GB1341473 A GB 1341473A
Authority
GB
United Kingdom
Prior art keywords
shaft
pitch
spool
blades
rotary
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
Application number
GB2185671A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1341473A publication Critical patent/GB1341473A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Supercharger (AREA)
  • Hydraulic Motors (AREA)
  • Sealing Devices (AREA)

Abstract

1341473 Variable pitch screws J M PEDERSEN 19 April 1971 [12 Feb 1970] 21856/71 Heading B7V A fluid pressure servomotor control system for adjusting the pitch of the blades 20 of a variable pitch marine screw, comprises a power output piston 39 mounted on a hollow shaft 38 housing the pilot valve spool 62 which is urged to the right by spring 69, and to the left by control pressure applied through a rotary coupling 14, the arrangement being such that upon movement of spool 62 the piston is moved to a corresponding position by power fluid which is also admitted through coupling 14. In modifications (Figs. 4, 5 and 8, 9, not shown) the spool is urged to a central position by a pair of oppositely acting compression springs and the control pressure unbalances the spool. Axial movement of the output shaft 38 is converted into rotary movement of blades 20 by a sliding cross-head 33 having inclined slots 35 which co-operate with eccentric bosses 28 on the blades. A spring 60 urges the mechanism into its full pitch forward drive position in the event of a failure of the hydraulic system. The rotary coupling comprises a stationary part provided with radial bores 94, 102, 103 and 114 which communicate via annular grooves 112 and bores in a rotary part 13 which is secured to a tail shaft 16. Thus the whole apparatus can be easily fitted to an existing vessel not originally built with a variable pitch propeller. Figs. 6, 7 and 11-13 (not shown) illustrate a number of different couplings incorporating floating seals which allow for a small degree of eccentricity in shaft 16. Fig. 15 illustrates a schematic system in which the pitch angle is indicated at a remote station by measuring the pressure inside hollow shaft 38, and the pitch is controlled automatically in accordance with engine temperature. Oil from the interior of shaft 38 is returned via bores 97, 98, 99, 56, 101 to outlet bore 103 which feeds a lubricating passage (not shown) in the tail shaft bearing.
GB2185671A 1970-02-12 1971-04-19 Controllable pitch propeller Expired GB1341473A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA74610 1970-02-12

Publications (1)

Publication Number Publication Date
GB1341473A true GB1341473A (en) 1973-12-19

Family

ID=4086327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2185671A Expired GB1341473A (en) 1970-02-12 1971-04-19 Controllable pitch propeller

Country Status (6)

Country Link
AU (1) AU2527071A (en)
CA (1) CA890187A (en)
DE (1) DE2105956A1 (en)
FR (1) FR2083069A5 (en)
GB (1) GB1341473A (en)
NL (1) NL7101791A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109334933A (en) * 2018-11-16 2019-02-15 中国船舶重工集团公司第七0四研究所 The bidirectional locking arrangement of controllable pitch propeller of low hydraulic shock

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1510969A (en) * 1974-12-04 1978-05-17 Newage Engineers Ltd Marine propeller pitch-control system
US4781533A (en) * 1986-09-30 1988-11-01 Kamewa Ab Control system for propeller with controllable pitch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109334933A (en) * 2018-11-16 2019-02-15 中国船舶重工集团公司第七0四研究所 The bidirectional locking arrangement of controllable pitch propeller of low hydraulic shock

Also Published As

Publication number Publication date
AU2527071A (en) 1972-08-17
DE2105956A1 (en) 1971-08-19
FR2083069A5 (en) 1971-12-10
NL7101791A (en) 1971-08-16
CA890187A (en) 1972-01-11

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees