US3842682A - Speed responsive governor mechanism - Google Patents

Speed responsive governor mechanism Download PDF

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Publication number
US3842682A
US3842682A US00278012A US27801272A US3842682A US 3842682 A US3842682 A US 3842682A US 00278012 A US00278012 A US 00278012A US 27801272 A US27801272 A US 27801272A US 3842682 A US3842682 A US 3842682A
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United States
Prior art keywords
lever
arrangement
response
pivotally mounted
pivotal axis
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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US00278012A
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English (en)
Inventor
J Bloom
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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Filing date
Publication date
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
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Publication of US3842682A publication Critical patent/US3842682A/en
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover

Definitions

  • a speed responsive governor arrangement comprises a rotatable governor mechanism having an output member engaging one end of a lever whose other end has a cam surface. A further cam surface is opposed to the cam surface on the lever and is movable relative thereto by a linkage responsive to two input parameters.
  • a spring loaded device is located between the cam surfaces so as to bias them apart. This device is rotatable in response to a third parameter, so that the moment applied to the lever, and hence to the output member of the governor mechanism to oppose movement thereof in response to an increase in speed, is variable in accordance with the aforesaid three parameters.
  • This invention relates to speed-responsive governor arrangements, and has an object to provide such a mechanism in a convenient form.
  • FIG. 1 is a section through a fuel control apparatus for a gas turbine engine, and incorporating a mechanism according to the invention
  • FIG. 2 is a scrap section on line 22 in FIG. 1.
  • a casing contains a speed responsive governor arrangement 11 driven, via shaft 12, by the shaft of a gas turbine engine 13. Also driven by the engine 13 is a pump 14 which supplied fuel to a space 15 within the casing 10.
  • sleeve 16 Slidable within casing 10 is a sleeve 16, and slidable within sleeve 16 is a piston closure member 17.
  • a further sleeve 18 Surrounding one end of sleeve 16 and also slidable in the casing 10 is a further sleeve 18.
  • Closure member 17 includes a hollow cylindrical portion 21 having cut-outs 22 by means of which the said variable metering orifice communicates with the bore of the sleeve 16.
  • the wall of sleeve 16 has further ports 23, 24 which are spaced axially from each other and from the ports 19. Port 23 communicates with an annular space 25 in casing 10, space 25 communicating with the main burners of the engine 13.
  • the end of member 17 combines with port 23 to control flow from the bore of sleeve 16 to engine 13 in accordance with the relative axial positions of members 17 and sleeve 16.
  • Ports 24 communicate via an annular space 26 in casing 10 with primary burners for the engine 13.
  • Sleeve 16 is rotatable within casing l0'by shaft 12 via gears 31.
  • Sleeve 16 is also axially slidable by a bellows 32 subjected internally to the compressor delivery pressure of engine 13, bellows 32 acting on sleeve 16 via a linkage 33.
  • Sleeve 18 has projections 34 engaged by rollers 35 carried by a forked lever 36 mounted in the casing 10 for movement about a pivot 37 in the casing 10.
  • Lever 38 formed with a cam surface 39.
  • a lever 40 is mounted for movement about a pivot 41 whose position is adjustable by means of a threaded stem 42.
  • the end of lever 40 remote from pivot 41 carries a roller 43 engaging a cam 44 which is rotatable in response to a control 45 by means of whicha a water/methanol mixture is supplied to the combustion chambers of the engine l3.
  • lever 46 Pivotally mounted on lever 40 intermediate the ends thereof is a lever 46.
  • One end of lever 46 carries a roller 47 engaging a cam 48 which is rotatable by a signal dependent of the temperature within the jet pipe of engine 13. Rollers43, 47 are biased apart and into engagement with the respective cams 44, 48 by a torsion spring 54.
  • the end of lever 46 on the opposite side of the pivote thereof, pivotally supports a fourth lever 49.
  • Lever 49 has a cam surface 50 directed towards cam surface 39.
  • Lever 49 is movable about its pivot by a threaded stem 51.
  • a member 52 is mounted between levers 38, 49 for movement about an axis 53. Pivotally mounted at opposite ends of member 52 are rocker arms 55, 56. The respective ends of each of arms 55, 56 carrying ball bearing assemblies 57, 58. Bearing assemblies 58 engage the respective cam faces 39. 50.
  • a tension spring 59 has its ends engaged around the bearing assemblies 57 to bias the latter towards one another, and hence assemblies 58 in directions-to urge the cam faces 39, 50 apart.
  • a pair of stops 60, 61 are pivotally mounted in the casing 10 and have their positions adjustable by respective stems 62, 63 to limit the pivotal movement of lever 36.
  • a desired engine speed is selected by means of a lever 64 connected to member 56 via a linkage arrangement (shown generally at 65), whereby response of member 56 to movement of lever 64 in either direction from a neutral position is in accordance with desired parameters.
  • Fuel supply to the main burners of engine 13 is dependent on flow through the metering orifice defined by ports 19, 20. For a given axial position of sleeve 16, flow through the metering orifice thus depends on the position of sleeve 18.
  • Sleeve 18 is urged by governor weight 30 in a direction to reduce fuel flow as engine speeds increases, and in the opposite direction by the bias appllied to lever 36 by spring 59. Rotation of member 52 in an anticlockwise direction as seen in FIG.
  • cams 44, 48 are rotated, as above described, in accordance with engine operating parameters and also, by moving cam face 50 relative to cam face 38 modify the moment of the force of spring 59 on lever 36, for given positions of member
  • a tension spring on member 52, together with bearing assemblies 57, 58 has the effect that in comparison with known arrangements, friction forces are significantly reduced between member 52 amd lever 36. Reduction instatic friction reduces hysteresis between movement of lever 64 arid the response of sleeve 18 to vary flow.
  • a speed-responsive governor arrangement comprising a body, a governor mechanism rotatably mounted in said body and including an output member movable relative to said body, a first lever pivotally mounted on the body and movable by said output member in response to changes in the speed of a shaft which provides a drive for the governor, said first lever having thereon a cam surface, a second lever pivotally mounted on the body and movable in response to a first parameter, a third lever pivotally attached to said body and pivotally mounted on the second lever for movement in response to a second parameter, a fourth lever pivotally mounted on said third lever and having a cam surface spaced from, and directed towards the cam surface on the first lever, a support mounted in said body and engaging said fourth lever at a location thereon spaced from the pivotal mounting thereof, whereby the cam surface on the fourth lever is movable relative to the cam surface on the first lever in response to said first and second parameters, a device angularly movable relative to the pivotal axis of the first lever and a spring carried by
  • An arrangement as claimed in claim 3 which includes a second actuating member engageable with one end of said third lever to move the latter in response to said third parameter.
  • An arrangement as claimed in claim 8 which includes means for biasing said one end of said third lever away from said other end of said second lever.
  • An arrangement as claimed in claim 1 which includes means for moving said fourth lever about its pivotal axis independently of said first and second parameters.
  • said means for moving said fourth lever comprises a member slidable in said body and engaging an end of said fourth lever remote from the pivotal axis thereof.
  • said angularly movable device includes a member pivotally mounted in said body for movement about an axis intermediate said cam surfaces and fifth and sixth levers pivotally mounted on said member, said spring comprising a tension spring engaging one end of each of said fifth and sixth levers, the other ends of said fifth and sixth levers being biased by said spring towards said respective cam surfaces.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transmission Devices (AREA)
  • Control Of Turbines (AREA)
  • Superconductive Dynamoelectric Machines (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
US00278012A 1971-08-04 1972-08-04 Speed responsive governor mechanism Expired - Lifetime US3842682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3662671A GB1393098A (en) 1971-08-04 1971-08-04 Speed responsive governor mechanisms

Publications (1)

Publication Number Publication Date
US3842682A true US3842682A (en) 1974-10-22

Family

ID=10389820

Family Applications (1)

Application Number Title Priority Date Filing Date
US00278012A Expired - Lifetime US3842682A (en) 1971-08-04 1972-08-04 Speed responsive governor mechanism

Country Status (5)

Country Link
US (1) US3842682A (it)
JP (1) JPS4828868A (it)
FR (1) FR2148280B1 (it)
GB (1) GB1393098A (it)
IT (1) IT961824B (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935703A (en) * 1973-07-18 1976-02-03 Joseph Lucas (Industries) Limited Fuel control system for gas turbine engine
US3956889A (en) * 1973-07-18 1976-05-18 Joseph Lucas (Industries) Limited Fuel control system for gas turbine engine
US4738597A (en) * 1986-02-19 1988-04-19 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Hydromechanical governor
US20030209074A1 (en) * 2002-03-25 2003-11-13 Ruff Stephen Anthony George Multi-axis G sensor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3550374A (en) * 1968-07-23 1970-12-29 Lucas Industries Ltd Speed responsive governors

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935703A (en) * 1973-07-18 1976-02-03 Joseph Lucas (Industries) Limited Fuel control system for gas turbine engine
US3956889A (en) * 1973-07-18 1976-05-18 Joseph Lucas (Industries) Limited Fuel control system for gas turbine engine
US4738597A (en) * 1986-02-19 1988-04-19 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Hydromechanical governor
US20030209074A1 (en) * 2002-03-25 2003-11-13 Ruff Stephen Anthony George Multi-axis G sensor

Also Published As

Publication number Publication date
FR2148280B1 (it) 1973-07-13
DE2238234A1 (de) 1973-02-15
JPS4828868A (it) 1973-04-17
IT961824B (it) 1973-12-10
FR2148280A1 (it) 1973-03-11
DE2238234B2 (de) 1976-09-09
GB1393098A (en) 1975-05-07

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