US3548987A - Electric speed control for fluid operated marine clutches - Google Patents
Electric speed control for fluid operated marine clutches Download PDFInfo
- Publication number
- US3548987A US3548987A US748718A US3548987DA US3548987A US 3548987 A US3548987 A US 3548987A US 748718 A US748718 A US 748718A US 3548987D A US3548987D A US 3548987DA US 3548987 A US3548987 A US 3548987A
- Authority
- US
- United States
- Prior art keywords
- signal
- speed
- propeller
- clutches
- clutch
- 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
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/0016—Control of angular speed of one shaft without controlling the prime mover
- H02P29/0027—Controlling a clutch between the prime mover and the load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19219—Interchangeably locked
- Y10T74/19251—Control mechanism
- Y10T74/19256—Automatic
- Y10T74/1926—Speed responsive
Definitions
- FLUID ABSTRACT A marine engine control system having slip 3 Claim 1 D in H clutches controlling propeller output speed. A manual speed a set which may be remotely mounted produces a signal which is [52] [1.8. I 192/104, compared with a propeller output signal to provide a control [92/5 1: 74/336: l92/87.l2 signal for varying clutch slippage to achieve the selective out- [51] Int. Cl. F16d 25/10 put speed.
- the control signal operates a transducer connected [50] Field of Search 192/104, with a direction selector valve for varying slippage in either 1041-, 103, 103F, 51, 3.5FPE, 87.12 the ahead or astem clutches.
- This invention relates to a control system for marine propulsion and more particularly relates tov a marine propulsion con.- trol system in which incremental propeller speed adjustment in both the ahead andastern directions is obtained through slip clutches utilizing an input control signal and a propeller feedback signal.
- Marine propulsion systems commonly utilize reduction and reversing gear arrangements for vessel speed and direction control. It is common practice to limit the speed range of the marine engine from rated speed down to approximately 50 propulsion units, previous systems have not provided a simple,
- Another object is to provide a marine engine control system in which propeller speed is controlled through slip clutches with a control signal obtained by comparing propeller output speed with a speed set input variable.
- Another important object is to provide a marine engine control system utilizing slip clutches in which an electrical control circuit may be remotely mounted to provide an input signal which combines with a propeller output signal to produce a control signal operating'a transducer controlling clutch slippage.
- Another important object is to provide a marine engine control system having ahead and astern propeller speed gears controlled by apair of slip clutches connected with a direction selector valve which in turn passes a controlled slip signal responsive to the difference between desired and feedback signals.
- gear 20 keyed-to shaft 18 is connccted to drive the propeller for ahead, and astern operation through a pair of gear sets and clutch assemblies.
- Shall 32 driven from the engine output shaft is connected with slip clutch 24 to drive pinion 26 meshing with propeller gear 20. This provides the ahead gear set and clutch arrangement.
- the astern gear and clutch arrangement may include gear set 23 and 30 which drive shaft 32, slip clutch 34, and pinion gear 36 meshing with gear 20.
- the slip clutches 24 and 34 are of a conventional construction and are adapted to undergo a controlled slippage of the clutch elements responsive to a controlled pressure below lockup pressure.
- the output speed of the clutch may thus be varied between freewheeling and lockup conditions while engine speed is maintained relatively constant.
- One type of clutch which may be utilized for this purpose is a slip clutch operated pneumatically and which comprises one or more inflatable members responding to input air pressure to vary the pressure between interleaved friction plates of the clutch.
- the invention is not limited to the particular type of clutch utilized.
- Control system Ill includes a manual set point system 38 producing a selectively variable input control signal at 40. This is compared with a feedback signal at 42 produced from feedback system 44. Input signal 40 and feedback signal 42 are compared to produce a control signal 46 for controlling the slippage of the clutches.
- Set point system 38 comprises a manual speed set device 48 which may be located at a position remote from the propulsion system and other control system components. This is advantageous in situations where the pilot is at a great distance from the main control system, as in the case of very long ore carrying vessels.
- Manual speed set 48 is conventional and may comprise a speed set potentiometer manually adjustable and electrically connected with a rotary positioner control 50.
- Control 50 is powered by electrical supply 52 and operates to providean electric signal 54 responsive to speed set 48 to power rotary positioner 56 which in turn adjusts the slip speed set potentiometer 58.
- the setting of potentiometer 5h provides an electrical input signal 40 to the amplifier slip governor device 60.
- Feedback system 44 comprises a bevel gear set 62, 64 driven from pinion gear 36 of the gear mechanism 16.
- a tachometer generator 66 provides an indication of propeller output speed.
- Frequency generator 68 driven from gear 64 provides an electrical output signal 70 proportional to propeller speed.
- the frequency generator is conventional and may comprise an inductive pickup type rotary speed rneasuring device. This system is not damaged by higher speeds resulting when the propeller shaft is operating at full speed, which could otherwise be destructive to mechanical governing drive systems.
- the output 70 from generator 68 is fed to a preamplifier 72 and then to a signal converter 74 producing electrical feedback sigial 42 responsive to propeller speed.
- Electrical supply 76 provides electrical power for the operation of governor 60, preamplifier 72, and signal converter 74.
- a conventional tachometer generator may be utilized in place of frequency generator 68, preamplifier i2. and signal converter 74 to produce feedback signal 42.
- Slip governor 60 is conventional and preferably comprises an electronic servo operational amplifier comparing input signal 40 and feedback signal 42 to produce an electrical control signal 46.
- Control signal 46 controls clutch slippage and therefore propeller speed through transducer 78 and direction selector valve 80.
- Transducer 78 is of conventional construction and is either electropneumatic as in the preferred-embodiment, or could be electrohydraulic depending on the type of clutch actuation mechanism involved. Thus, although air operated clutches are preferred, hydraulically or mechanically operated slip clutches may also be utilized. Electropneumatic transducer '78 receives air pressure from air supply 82 and directs it as a pneumaticislave signal 34 to direction selector valve fill. Signal 84 is proportionally responsive to control signal Direction selector valve 80 diverts this slave signalto either the astem conduit 86 or ahead conduit 88 according to the valve position manually selected by the pilot.
- slave signal 84 is reduced by transducer 78 in an amount required to slip the clutches until the speed set 48 is manually adjusted so that rotary positioner control 50, rotary positioner 56, and speed set potentiometer 58 change the balance between 42 and 40.
- This unbalance between the signals into governor 60 responds by reducing control signal 46 into transducer 78.
- Slave signal 84 is in turn reduced as it follows signal 46 so that the air pressure to the selected clutch is accordingly reduced, the clutch slips, and propeller speed drops.
- This drop in propeller speed is sensed by feedback circuit 44 through frequency generator 68, preamplifier 72, and signal converter 74 to vary feedback signal 42.
- a control system for use with a marine engine driving a propeller including the combination of speed set means for selectively producing an input signal, means sensing'propeller output speed to produce a feedback signal, a governor to produce a control signal responsive to an imbalance between said input and feedback signals, a transducer for producing a variable slave signal responsive to the controlsignal, two slip clutches for controlling propeller speed responsive to the slave signal, gear means operablewith the slip clutches for selected ahead and astem propeller operation, and directional control means selectively operable to direct said slave signal to one of the slip clutches for said selected propeller operation, each slip clutch comprising an air operated clutch adapted to reduce propeller speed responsive to variation of the slave signal, said slave signal comprising circuit means for directing air pressure to the slip clutches, said transducer being connected with the circuit means for varying the air pressure responsive to the control signal.
- the invention of claim 1 further characterized in that said speed set means is manually adjustable for producing an input signal comprising a selectively variable electrical signal, said feedback signal comprises an electrical signal varying in response to propeller speed, acid governor produces a control signal responsive to a difference in values of said input and feedback signals, and said transducer operates to reduce said slave signal responsive to variation in said control signal.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74871868A | 1968-07-30 | 1968-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3548987A true US3548987A (en) | 1970-12-22 |
Family
ID=25010626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US748718A Expired - Lifetime US3548987A (en) | 1968-07-30 | 1968-07-30 | Electric speed control for fluid operated marine clutches |
Country Status (1)
Country | Link |
---|---|
US (1) | US3548987A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3653476A (en) * | 1970-07-29 | 1972-04-04 | Westinghouse Air Brake Co | Slip control systems for air clutches |
DE2347519A1 (en) * | 1972-09-22 | 1974-04-11 | Sommer Co | DRIVE WITH VARIABLE SPEED |
US4194414A (en) * | 1976-10-08 | 1980-03-25 | Toyota Jidosha Kogyo Kabushiki Kaisha | Planetary speed reducer |
US4282955A (en) * | 1978-05-02 | 1981-08-11 | Fujitsu Fanuc Limited | Rotary shaft control system |
US4433769A (en) | 1978-10-13 | 1984-02-28 | Dominion Engineering Works Limited | Grinding mill control system |
US4463628A (en) * | 1982-04-01 | 1984-08-07 | Deere & Company | Transmission control interface mechanism |
US4595371A (en) * | 1983-12-30 | 1986-06-17 | Scott Heston | Power take-off system for marine engines |
US5085302A (en) * | 1990-12-18 | 1992-02-04 | The Falk Corporation | Marine reverse reduction gearbox |
US6679740B1 (en) * | 1999-09-02 | 2004-01-20 | Yanmar Diesel Engine Co., Ltd. | Method of hydraulically controlling a marine speed reducing and reversing machine in crash astern operation |
WO2005037643A1 (en) * | 2003-10-20 | 2005-04-28 | Nautitech Pty Ltd | De-coupling clutch, particularly for marine use |
US20080139358A1 (en) * | 2004-10-29 | 2008-06-12 | Van Druten Roell M | Drive provided with a continuously variable transmission and a chargeable reverse shaft |
US20120213635A1 (en) * | 2011-02-22 | 2012-08-23 | Tso-Tung Lin | Wind-power generation device |
-
1968
- 1968-07-30 US US748718A patent/US3548987A/en not_active Expired - Lifetime
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3653476A (en) * | 1970-07-29 | 1972-04-04 | Westinghouse Air Brake Co | Slip control systems for air clutches |
DE2347519A1 (en) * | 1972-09-22 | 1974-04-11 | Sommer Co | DRIVE WITH VARIABLE SPEED |
US3834502A (en) * | 1972-09-22 | 1974-09-10 | Sommer Co | Variable speed drive with electronic control means |
US4194414A (en) * | 1976-10-08 | 1980-03-25 | Toyota Jidosha Kogyo Kabushiki Kaisha | Planetary speed reducer |
US4282955A (en) * | 1978-05-02 | 1981-08-11 | Fujitsu Fanuc Limited | Rotary shaft control system |
US4433769A (en) | 1978-10-13 | 1984-02-28 | Dominion Engineering Works Limited | Grinding mill control system |
US4463628A (en) * | 1982-04-01 | 1984-08-07 | Deere & Company | Transmission control interface mechanism |
US4595371A (en) * | 1983-12-30 | 1986-06-17 | Scott Heston | Power take-off system for marine engines |
US5085302A (en) * | 1990-12-18 | 1992-02-04 | The Falk Corporation | Marine reverse reduction gearbox |
WO1992011472A1 (en) * | 1990-12-18 | 1992-07-09 | The Falk Corporation | Marine reverse reduction gearbox |
US6679740B1 (en) * | 1999-09-02 | 2004-01-20 | Yanmar Diesel Engine Co., Ltd. | Method of hydraulically controlling a marine speed reducing and reversing machine in crash astern operation |
WO2005037643A1 (en) * | 2003-10-20 | 2005-04-28 | Nautitech Pty Ltd | De-coupling clutch, particularly for marine use |
US20080139358A1 (en) * | 2004-10-29 | 2008-06-12 | Van Druten Roell M | Drive provided with a continuously variable transmission and a chargeable reverse shaft |
US7765887B2 (en) * | 2004-10-29 | 2010-08-03 | Roell Marie Van Druten | Drive provided with a continuously variable transmission and a chargeable reverse shaft |
US20120213635A1 (en) * | 2011-02-22 | 2012-08-23 | Tso-Tung Lin | Wind-power generation device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: REXNORD INC. Free format text: CHANGE OF NAME;ASSIGNOR:REX CHAIN BELT INC.;REEL/FRAME:004713/0513 Effective date: 19850905 |
|
AS | Assignment |
Owner name: NORDBERG INC., A CORP. OF DE,WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:REXNORD INC.;REEL/FRAME:004834/0102 Effective date: 19880126 Owner name: NORDBERG INC., 3073 S. CHASE AVE., MILWAUKEE, WI 5 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:REXNORD INC.;REEL/FRAME:004834/0102 Effective date: 19880126 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF BOSTON, THE, MASSACHUSETTS Free format text: SECURITY INTEREST;ASSIGNOR:NORDBERG, INC., A DE CORP.;REEL/FRAME:004930/0280 Effective date: 19880729 Owner name: FIRST NATIONAL BANK OF BOSTON, THE, 100 FEDERAL ST Free format text: SECURITY INTEREST;ASSIGNOR:NORDBERG, INC., A DE CORP.;REEL/FRAME:004930/0280 Effective date: 19880729 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF BOSTON, THE, 100 FEDERAL ST Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:NORDBERG, INC., 3073 SOUTH CHASE AVE., MILWAUKEE, WI 53207, A DE CORP.;REEL/FRAME:005060/0994 Effective date: 19890308 |