US2343378A - Governing device for engines, especially for the drive of ship screws with variable pitch - Google Patents

Description

March 7, 1944. H, KlESER 2,343,378 GOVERNING DEVICE FOR ENGINES ESPECIALLY FOR THE DRIVE 0F SHIP SCREWS WITH VARIABLE PITCH Filed Dec. 6, 1940 2 Sheets-Sheet 1 save NTcR Hue"? \qssek March 7, 1944.

H. KIES GOVERNING DEVICE FOR ENGINES ESPECIALLY FOR THE DRIVE 0F SHIP SCREWS WITH VARIABLE PITCH Filed Dec. 6, 1940 2 Sheets-Sheet 2 f. qrromver Patented Mar. 7, 1944 CIALLY FOR THE DRIVE OF SHIP SCREWS WITH VARIABLE PITCH lingo Kieser, Heidenheim, Brenz, Germany, as-

; signor to American Vcith Contact Company.

Inc., New York, NY.

Application December 6, 1940, Serial.No. 368,892

I In Germany October 3,1939

1 Claim.

This invention-relatesto-governing devices for engines for the driving of ship's. screws with variable pitch, and consists essentially in the provision of an additional control cam, besides the usual centrifugal governor, the action of which cam depends uponthe variation of the pitch of the ships screw and at the same time upon the speed of the engine. This cam is .in the form of a drum, the shape of which is determined byprotracting upon a cylinder the necessary adjustment for the stroke of the speed governor operated steam inlet or control valve in an axialdirection at different speed settings of the governor and in a circumferential direction at the different pitches of the propeller 1 blades. Such a drum is .moved in an axial direction by the governor speed setting mechanism and rotated about itsaxis by the propeller pitch control mechanism. Thus the governor control of the steam inlet valv'eis adjusted or corrected by the drum in accordance withthe speed setting of the governor and the pitch of the propeller blades in order to provide better speed regulation of the engine.

The invention will be more fully described hereinafter, embodiments shown in the drawings, and will be finally pointed out in the claim.

In the accompanying drawings- Fig. 1 is a diagrammatic view of an embodiment of my invention;

Fig. 2 shows an embodimentof my invention in a mechanical manner,p'arts also being diagrammatic;

Fig. 3 is an enlarged section taken on line 3-3 of Fig. 2; F a

Fig. 4 is an enlarged section on line 4-4 of Fi 2, and

Fig. 5 is a cross section taken on line 5-5 of Fig. 4.

Similar characters of reference indicate corresponding parts.

Referring to the drawings, the known and usual governor l is driven by an engine shaft 2, by means of a pair of bevel gears 3 and 4. A governor sleeve 5 has a lever 6 connected therewith which through link 2| actuates a control or steam inlet valve l of a steam engine 20. A spindle 9 has a hand wheel I0, which adjusts the speed by pressing a spring 8 upon the governor i. A cam drum II on a shaft I2 is actuated in an axial direction by a lever l3 and is rotated by a lever M. The lever I3 is connected with the spindle 9, and the lever I4 is connected with a device for changing the pitch of the screw I5, that is, the hand lever 16. A roller IS on a rod the position of the governor, which in turn de-- pends upon the speed'of the engine, but also upon the pitch of the ships screw.

The shape of the drum II. is determined by protracting upon a cylinder the necessary adjustment for thestroke of the'speed governor operated steam'inlet or control valve'in an axial direction at the different speed settings of the governor and inv a circumferential direction at the different pitches of the propeller blades. The

drum I l is moved in an axialdirection by the governor speed setting mechanism and rotated about its axis by the propeller pitch control mechanism. Thus the governor control of the steam inlet valve. is adjusted or. corrected by the drum in accordance with the speed setting of the governor and the pitch of the propeller blades in order to provide better speed regulation of the engine.

The invention is also applicable to bladewheel propellershaving oscillating blades of the Voith- Schneider type. 1

In referring to Figs. 2.to. 5, there is shown the mechanical parts utilizedzto carry out my invention. Any suitable engine indicatedgenerally by 20 has a control valve I on the top thereof which is supplied with steam as indicated by the arrow and the word "steam and which steam enters the valves ofthe engine 20 in .a manner well known. The control valve. 1 which controls the entrance of the steam-into. the engine 20 has a vertical rod 2| which is pivoted at 221 to the.

rod 6. This rod 6 at one of its ends is pivoted at 23 to the rod H. The other end of the rod 6 has an elongated opening 24 through which passes a pin 25 of the sleeve 5. The sleeve 5 is attached to the sleeve 26 of the governor l. The sleeve 26 is supported by the bearing 21 and encloses the shaft 21 which on its lower end has a bevel gear 4 meshing with the bevel gear 3 on the shaft 2 of the engine 20. The governor I has on its upper end a cup-shaped member 29 in which rests the lower end of the spring 8. The upper end of the spring 8 rests against a cupshaped member 30 which is secured to the stationary rod 9 which is supported in the bearing 3|. The threaded part 32 of the spindle 9 engages an interior threaded bracket 33 which in turn at 34 pivotally supports the elbow lever I 3. One end 35 of the elbow lever is provided with a slot 36 which passes the pin 31. The other free end of the elbow lever H has a similar slot 38 en;-

gaged by the pin 39 which pin is fixed to a sleeve 40 of the shaft 4|.

This shaft 4| is supported at one end by the bearing 42 and at its other end by the bearing 43. The shaft has secured thereto an elongated pinion 44. This pinion 44 is in engagement with the vertical rack 46, the lower end of which is guided by a bearing 41 and the upper end of the rack 46 has a pin 45 engaging a slot 45 to one end 41 of the elbow lever l4. This elbow lever is pivotally supported at 48 to a bracket 49 supported by the bearing 43 which bracket 49 has an extension upon which a scale 50 is shown. The elbow lever l4 has its other end pivotally connected at 52 with a rod 53 which has its other end provided with a slotted portion 54 engaged by a pin 55, the pin 55 being on the lever 55 operated by the handle l6. pivotally supported on a stationary bracket 51 at 58 and the lower end of this lever 56 has a slotted end 59 engaged by a pin 60, which pin 60 is part of a slidable sleeve 62. The sleeve 62 slides upon the shaft 2 longitudinally, which shaft is supported by the bearing 63. The free end of the shaft 2 engages the sleeve 62 as shown in detail in Fig. 4 and is secured to a disc 65 within a propeller housing 66. On the disc 65 there are attached. four like racks 61 each of which has its teeth engaging the corresponding pinion 68, one pinion 68 being for each propeller blade and suitably secured to the shaft thereof. The propeller is generally indicated by |5. By the movement of the racks 61 the blades of the propeller may be moved 45 each way from the position of the blade 68 shown in Fig. 4. This form of connection is only one of numerous forms that may be used and variations may be made therein, as is known. Returning to the shaft 4|, and disposed between the slotted end 38 and the elongatedpinion 44 the impulse member H is secured upon the shaft 4|. This impulse member I has a. cutout portion as shown in Fig. 3. The surface of the impulse member H is engaged by the roller l8 which is. supported by a rod H, the lower end of which has a cup 12 against which the spring 13 presses, the. other end of the spring. resting upon a bearing through which. cup 14 and bearing. 15, the rod passes, the lower end of which rod I! is pivotally engaged at 23 with the rod. 6. The roller I8 is shownv diagrammatically in Fig. 1, as in spherical form, and. in Fig. 3, the roller is shown as curved portion H to enable the. roller to ride upon the exterior surface of the impulse member II and eventually enter recess 10 and This lever 56 is ride through the same and out of the same as the case may be, in the event the parts are so adjusted to permit a complete rotation of the impulse member.

5 The essence of the structure shown in Fig. 2 consists in having the impulse member capable of being longitudinally moved by means of the hand wheel ID, and bell crank l3, and the impulse member II is capable of being rotated by means of the lever 56 and link 53 and bell crank l4, and rack 46 and pinion 44. Thus by the longitudinal and rotatable adjustment of the impulse member II, the roller I8 is correspondingly adjusted in position and in consequence the steam valve 1 is controlled thereby.

From the foregoing it is believed that the construction', operation and advantages of my inventlon may be readily understood by those skilled in the art without further description, it being borne in mind that numerous changes may be made in the details disclosed without departing from the spirit of the invention as set out in the following claim.

I claim:

In a governing device for a steam engine having an engine shaft, a steam control valve for varying the steam supply to the steam engine, a speed responsive governor, a speed setting means for said governor, including an axially movable spindle, means actuated by the governor for actuating the steam control valve, and a screw blade propeller driven by said engine shaft and having blades of variable pitch and having means for changing the pitch of said. blades, the combination of a cam drum having a protracted surface shape radially conforming to the necessary adjustment for the stroke of the steam control valve at different blade pitches and axially conforming to the necessary adjustment for the stroke of the steam control valve at different speed settings of the governor, means connecting said cam drum and spindle for axially moving said cam drum by the movement of the spindle, means connecting the drum and pitch changing means for rotating the drum upon the change in the pitch of the blades, a member in contact with and movable by the protracted surface of the cam drum, and a lever connecting said member with the governor and with the steam control valve, whereby the amount of steam supply to the steam control valve. is controlled by the speed of the engine shaft and by the pitch of the blades.

HUGO KIESER.

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