US3395762A - Pitch controlling apparatus of a propeller of ships - Google Patents
Pitch controlling apparatus of a propeller of ships Download PDFInfo
- Publication number
- US3395762A US3395762A US646902A US64690267A US3395762A US 3395762 A US3395762 A US 3395762A US 646902 A US646902 A US 646902A US 64690267 A US64690267 A US 64690267A US 3395762 A US3395762 A US 3395762A
- Authority
- US
- United States
- Prior art keywords
- propeller
- shaft
- section
- rod
- rod member
- 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
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
- B63H3/06—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
- 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
- B63H2003/085—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 the control element having means for preventing rotation together with the propeller
Definitions
- a double acting hydraulic cylinder mechanism is nonrotatably fixed forwardly of the front end of the propeller shaft and coaxially therewith.
- An axially slideable rod extends through the propeller shaft to connect the piston of the hydraulic cylinder with pitch changing mechanism in the propeller hub.
- the rod comprises two axially aligned members.
- the forward rod member is connected with the piston and confined to sliding motion therewith.
- a rotatable connection between the rod members constrains the after rod member to slide fore-and-aft with the forward rod member but leaves it free to rotate with the propeller shaft.
- This invention relates to pitch changing apparatus for controllable pitch marine propellers, and pertains more particularly to hydraulic apparatus for actuating the pitch changing mechanism of such a propeller, said apparatus being of the type comprising a double acting cylinder in which a piston is axially slideable and rod means connected with the piston and extending aft therefrom concentrically through a hollow shaft for the propeller.
- FIGURE 1 is a view partly in side elevation and partly in longitudinal section of the gear case, propeller shaft and pitch change actuating mechanism for such a propeller.
- the propeller shaft designated generally by E, was hollow and comprised three coaxially aligned sections, namely, an after section 0 to the rear of which was connected the propeller (not shown), a forward section Q which comprised a gear axle and which had an enlarged gear hub R formed intermediate its ends, and a coupling W which connected the after end of the forward section Q with the forward end of the after section 0 and constrained the shaft sections to rotate in unison.
- a gear case D enclosed the reduction gearing A and all but the after end portion of the forward propeller shaft section Q.
- the forward shaft section Q had a large diameter bore in its gear hub portion R that served as a cylinder in which a piston S was slideable fore-and-aft to provide a doubleacting hydraulic actuator.
- the piston S was in turn connected with a rod C that extended coaxially through the hollow propeller shaft and had its after end disposed in the propeller hub for actuation of pitch changing mechanism.
- the rod C comprised two axially aligned rod members connected by a connector X that was located in the coupling W of the shaft.
- the mechanism by which foreand-aft motion of the rod C was converted into variation of the pitch of the propeller blades is well known and is not affected by the present invention, and is therefore not shown.
- Another object of this invention is to provide a pitch change actuator mechanism for a marine propeller which is arranged to permit quick and easy access to the rings of the hydraulic actuator piston and the packings for the rod member that connects said piston with the pitch altering mechanism in the propeller.
- FIGURE 2 is a view generally similar to FIGURE 1 but illustrating a propeller pitch change actuator mechanism embodying the present invention.
- the pitch change actuator mechanism of this invention comprises, in general, a gear case D having an upper section I and a lower section K, the upper section I being generally concentric to an input shaft 1 that is connectable with an engine (not shown) and the lower section K being generally concentric to a hollow fore-and-aft extending propeller shaft E which has a propeller (not shown) connected to its after end.
- a double acting bydraulic actuator H is non-rotatably mounted at the front of the lower section of the gear case, and the piston 16 of said actuator is connected with a rod C that extends through the hollow propeller shaft and has its after end connected with conventional pitch changing mechanism (not shown) in the hub of the propeller.
- the input shaft 1 is drivingly connectable with the propeller shaft through a clutch (not shown) that is located in the after portion B of the upper case section I and through reduction gearing A comprising a driving gear 3 that is concentric with the driving shaft 1 and a larger driven gear 4 on the propeller shaft.
- the propeller shaft E as is more or less conventional, comprises a forward section 2 that provides an axle for the driven gear 4, a coaxial after section 13 which can be considered the propeller shaft proper, and a medial coupling G which connects the forward and after shaft sections and constrains them to rotate in unison.
- the gear axle or forward section 2 of the propeller shaft is journaled in a pair of radial thrust bearings 26 that are located at opposite sides of the driven gear 4 and are carried by the gear case, and it is axially confined by a pair of end thrust bearings 27, similarly located at opposite sides of the gear 4, inwardly of the bearings 26, and carried by the gear case.
- the coupling G of the propeller shaft has a substantially large bore therethrough and has a radially outwardly projecting flange 34 on each of its ends.
- Each of the flanged collars 22 has a tapering bore and telescopes over a correspondingly tapered portion of its shaft section, while a nut 23, threaded onto the extreme end portion of the shaft section, cooperates with the taper in the shaft section to prevent axial displacement of the collar relative to the shaft.
- a key 24 constrains each collar to rotate with its shaft section, and the coupling G thus causes the after propeller shaft section 13 (the propeller shaft proper) to rotate with the gear axle 2.
- the cylinder of the hydraulic actuator H is shown as comprising a generally tubular cylinder body 15 and end wall members 20 and 21, the after end wall member 20 being fixed to the gear case to further serve as a forward wall of the lower gear case section K.
- Pressure oil passages 17 open radially from the bore in the cylinder body 15 to provide for flow of oil to and from the interior of the cylinder, and it will be observed that these passages can be connected directly with suitable pipes or tubes (not shown) inasmuch as the cylinder is fixed with respect to the gear case.
- the rod C comprises a forward member 31 which is coupled to an after member 32 means of a rotatable connector which is described hereinafter and which is located within the propeller shaft coupling G.
- the front end portion of the forward rod member 31 has a reduced diameter and is received in a closely fitting coaxial bore in the piston 16.
- a guide member 18 Projecting coaxially forwardly from the front end of the rod is a guide member 18 which is preferably of smaller diameter than the rod and can be formed integrally with the forward rod member.
- the guide member 18 extends through a closely fitting bore in the forward wall 21 of the cylinder and into a bracket 29 that is fixed on said wall and projects forwardly therefrom.
- a transverse pin 30 on the front end of the guide member 18 is slideably received in closely fitting longitudinal slots in the bracket 29 to cooperate with the bracket in guiding the rod in fore-and-aft motion and in preventing rotation of the rod and the piston.
- the rotatable connector which couples the rod members 31 and 32 comprises a collar nut 10 threaded onto the front end of the after rod member 32, a bushing 8 and thrust bearings 5 held in place on the rear end portion of the forward rod member 31 by means of a nut 9 that is threaded onto the rear extremity of said rod member 31, and a longitudinally split sleeve 11 having radially inwardly projecting circumferential flanges and which embraces the collar nut 10 and the bearings 5.
- the bushing 8 fits on a reduced diameter portion of the forward rod member 31 near its rear extremity and is confined against both rotational and axial motion relative to said rod member by the nut 9.
- An annular spacer 12 is confined axially between the collar nut 10 and the outer race of the rear thrust bearing 5.
- the coupling G of the propeller shaft confines the parts of the split sleeve 11 against lateral separation. It will also be apparent that the split sleeve is slideable fore-and-aft in the bore of the coupling G but that the split sleeve and the after rod member 32 tend to rotate with the propeller shaft while the forward rod member 31 is confined to fore-and-aft motion, the bore in the forward propeller shaft section 2 being large enough to provide clearance all around the forward rod member 31.
- the hydraulic actuator H can be readily disassembled because of its accessible location of the front of the lower section of the gear case. Such disassembly also provides for ready access to glands in the end wall members 20 and 21 of the cylinder that provide seals around the forward rod member 31 and the guide member 18, respectively.
- this invention provides a pitch changing actuator for a controllable pitch marine propeller whereby accurate propeller pitch control can be consistently maintained without the need for frequent repair or replacement of parts, and comprising a readily accessible double-acting hydraulic cylinder that can be quickly and easily disassembled for replacement of piston rings and rod packing.
- a rotatable shaft having an after section at the rear of which the propeller is secured, a forward section and a hollow coupling that connects the rear end of the forward section with the front end of the after section and constrains said sections to rotate in unison, and means comprising a concentric gear on said forward section of the rotatable shaft for drivingly connecting the same with an engine, means for actuating the pitch changing mechanism of the propeller comprising:
- (B) means fixing said cylinder forwardly of the forward section of the rotatable shaft and concentric therewith;
- (E) means in said hollow coupling section providing a rotatable connection between the adjacent end portions of the first and second rod members by which they are constrained to fore-and-aft motion in unison but whereby the second rod member can partake of rotation of the rotatable shaft while the first rod member is confined to fore-and-aft motion.
- said hydraulic cylinder being fixed to the gear case forwardly of the front end of the rotatable shaft and coaxially therewith; and (B) said rod means comprising (1) a (forward rod member which extends coaxially th-rough the forward section of the rotatable shaft and projects beyond the opposite ends thereof, said forward rod member being connected to the piston at its front end so as to be constrained to fore-and-after motion with the piston,
- an after rod member which extends coaxially through the after section of the rotatable shaft and is slideable fore-and-aft relative thereto and can rotate therewith
- bracket means on the front of the cylinder having fore-and-aft extending guide surfaces between which said transverse pin is received and which cooperate with it in preventing rotation of the piston and first rod member, the position of the pin along said guide surfaces also providing visible indication of propeller pitch.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Actuator (AREA)
- Gear Transmission (AREA)
- Structure Of Transmissions (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5871366 | 1966-09-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3395762A true US3395762A (en) | 1968-08-06 |
Family
ID=13092121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US646902A Expired - Lifetime US3395762A (en) | 1966-09-07 | 1967-06-19 | Pitch controlling apparatus of a propeller of ships |
Country Status (5)
Country | Link |
---|---|
US (1) | US3395762A (de) |
DE (1) | DE1506820A1 (de) |
GB (1) | GB1151279A (de) |
NL (1) | NL139491B (de) |
SE (1) | SE344444B (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4142835A (en) * | 1976-07-14 | 1979-03-06 | Chuetsu Waukesha Kabushiki Kaisha | Pitch controlling device of a marine propeller |
US5364231A (en) * | 1992-12-22 | 1994-11-15 | Alliedsignal Inc. | Full authority propeller pitch control |
US5954479A (en) * | 1996-12-16 | 1999-09-21 | Smith; Ronald A. | Twin engine, coaxial, dual-propeller propulsion system |
US20080292462A1 (en) * | 2007-05-25 | 2008-11-27 | Siemens Aktiengesellschaft | Device for the adjustment of the pitch of a motor blade of a wind turbine |
CN102417024A (zh) * | 2011-11-18 | 2012-04-18 | 南京高精船用设备有限公司 | 船舶推进器紧凑型导架 |
WO2018234328A1 (en) | 2017-06-19 | 2018-12-27 | Rolls-Royce Marine As | ROTARY ACTUATOR, HUB WITH VARIABLE PITCH, PROPELLER BRACKET |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB644534A (de) * | ||||
BE566757A (de) * | ||||
GB496087A (en) * | 1937-02-13 | 1938-11-24 | Rene Jean Fondanaiche | Improvements in and relating to air screws with a variable and reversible pitch |
FR1104473A (fr) * | 1954-05-10 | 1955-11-21 | Bretagne Atel Chantiers | Mécanisme de commande des pales d'une hélice à pales orientables portée par un arbre de couche entraîné par réducteur |
US2946317A (en) * | 1956-11-07 | 1960-07-26 | Lips Nv | Adjusting mechanism for adjusting the pitch of the blades of a marine propeller |
US3092186A (en) * | 1962-01-04 | 1963-06-04 | James K Maclean | Variable pitch propeller mechanism |
US3148735A (en) * | 1964-05-12 | 1964-09-15 | Donald L Miller | Variable pitch propeller for small boats |
US3269121A (en) * | 1964-02-26 | 1966-08-30 | Bening Ludwig | Wind motor |
-
1967
- 1967-06-13 GB GB27220/67A patent/GB1151279A/en not_active Expired
- 1967-06-19 US US646902A patent/US3395762A/en not_active Expired - Lifetime
- 1967-06-20 DE DE19671506820 patent/DE1506820A1/de active Pending
- 1967-06-28 SE SE9438/67*A patent/SE344444B/xx unknown
- 1967-09-07 NL NL676712303A patent/NL139491B/xx not_active IP Right Cessation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB644534A (de) * | ||||
BE566757A (de) * | ||||
GB496087A (en) * | 1937-02-13 | 1938-11-24 | Rene Jean Fondanaiche | Improvements in and relating to air screws with a variable and reversible pitch |
FR1104473A (fr) * | 1954-05-10 | 1955-11-21 | Bretagne Atel Chantiers | Mécanisme de commande des pales d'une hélice à pales orientables portée par un arbre de couche entraîné par réducteur |
US2946317A (en) * | 1956-11-07 | 1960-07-26 | Lips Nv | Adjusting mechanism for adjusting the pitch of the blades of a marine propeller |
US3092186A (en) * | 1962-01-04 | 1963-06-04 | James K Maclean | Variable pitch propeller mechanism |
US3269121A (en) * | 1964-02-26 | 1966-08-30 | Bening Ludwig | Wind motor |
US3148735A (en) * | 1964-05-12 | 1964-09-15 | Donald L Miller | Variable pitch propeller for small boats |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4142835A (en) * | 1976-07-14 | 1979-03-06 | Chuetsu Waukesha Kabushiki Kaisha | Pitch controlling device of a marine propeller |
US5364231A (en) * | 1992-12-22 | 1994-11-15 | Alliedsignal Inc. | Full authority propeller pitch control |
US5954479A (en) * | 1996-12-16 | 1999-09-21 | Smith; Ronald A. | Twin engine, coaxial, dual-propeller propulsion system |
US20080292462A1 (en) * | 2007-05-25 | 2008-11-27 | Siemens Aktiengesellschaft | Device for the adjustment of the pitch of a motor blade of a wind turbine |
US8152470B2 (en) * | 2007-05-25 | 2012-04-10 | Siemens Aktiengesellschaft | Device for the adjustment of the pitch of a motor blade of a wind turbine |
CN102417024A (zh) * | 2011-11-18 | 2012-04-18 | 南京高精船用设备有限公司 | 船舶推进器紧凑型导架 |
WO2018234328A1 (en) | 2017-06-19 | 2018-12-27 | Rolls-Royce Marine As | ROTARY ACTUATOR, HUB WITH VARIABLE PITCH, PROPELLER BRACKET |
Also Published As
Publication number | Publication date |
---|---|
NL139491B (nl) | 1973-08-15 |
NL6712303A (de) | 1968-03-08 |
GB1151279A (en) | 1969-05-07 |
DE1506820A1 (de) | 1969-07-10 |
DE1506820B2 (de) | 1970-10-29 |
SE344444B (de) | 1972-04-17 |
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