US1559065A - Governor - Google Patents

Description

E. J. BLAKE Oct. 27,1925- GOVERNOR Filed Jan. 27, l9 19 3 wvewtow attozwua 0 Patented 0a. 27, 1925.

YORK, AS'SIG-NOB, BY MESNE ASSI GNMENTS, TO THE ELI J. BLAKE, OF BUFFALO, NEW

. ANY, A CORPORATION OF MARYLAND.

GO'UIaD COUPLER COMP GOVERNOR.

Application filed January 27, 1919. Serial No. 273,225.

steam turbines.

It was my object to BLAKE, a citiand resldln at New ork, useful Imof which the folinvention relates to governors, and particularly to a centrifugal governor for design a governor of the above character which could be applied directly to the end of a an extension thereof, that is, to

power shaft and as be applied so that the governor would act in alignment with the shaft, and .also to eliminate the element of frictlon in such an arrangement.

The governor described below in the accompanying drawing is my endeavors to the above end.

Fig. 1 of the drawing shows a and shown a result of longit1idinal section of the governor together with a portion of the end of the power shaft to which it is applied.

Fig. 2 shows a somewhat simpler form of governor.

A member end of the shaft 2. 1 is screwed onto the shaft and place by cotter-pin 3.

InFig'.1t

1 is suitably fastened onto the he member is held in The member 1 is generally cup-shaped. At the mouth of the cup is placed a disk 4 held of bolts 5.

the cup is in place by means The interior of the mouth of screw-threaded, and screwed into being apertured to receive the as shown in ment with'the shaft member 6 Fig. 1. Mounted in axial align- 2 is a valve member comprising a valve shaft 7 having a stiff coiled spring 7 .ttached to its the other end of the spring 7 dle 7 secured thereto, whereby a dle is provided which is flexible at 7 inner end,

having spinvalve spin- Surrounding the member ,7" is a disk-shaped spring seat member 8 with an extension 9 extending into an opening in the member 1 and having a sliding engagement therewith and so arranged that it has a relative longitudinal motion with respect to the member 1 and the shaft 2. This member bered on the side opposite th Mounted around the member 7 8 is chame shaft 2. and within the chambered portions of the members 6 and 8 is a coil spring 10. Mounted in the member 1 are centrifugal elements one of which is shown at 11. These elements fulcrumed at 12 and the curved ends thereof bear against the member 8. The member 7 is fixed with relation to the member 8. Surrounding the parts above described is a casing 13, and this casing at its'outer end is provided with a-steam inlet passage 14 and an exhaust 15, and ports 16 and 17, forming a communication between the passages 14 and 15. The housing 13 is provided with an opening to the outside atmosphere in alinement with the passages 16 and 17 and this opening is normally closed by a screw pluga's shown in Fig. 1. The passage 15 may lead directly to the turbine or to a throttle valve for controlling the main steam supply. On the end of the valve member 7 is a valve 18 which is connected with the other part of the member 7 by means of a reduced neck portion 19. The valve 18 is arranged'to pass inside theport 16, and a part of the member 7 likewise passes within the port 17, for the purpose of controlling the flow of steam through these two ports.

Surrounding the member the casing 13 is prevents the leakage of steam from the chamber 21 into the governor. This pack ing is also relatively Surrounding the casing 13' is a band 22 of non-corrodible metal, the same being held in place by means of the bolts 23.

The casing 13 may be supported in any suitable manner but in the arrangement shown is supported by a flange portion 24 which is held against a'supporting member 25 by meansof bolts 26. Between the flange 24 and the member 25 is a gasket 27.

The operation of the device of Fig. 1 isas follows:

When the machine is at rest, the parts assume the position shown in the drawing. As the speed increases, it finally reaches a point where the centrifugal force causes the straight ends ofthe member 11 to fly outwardly against the action of the spring 10. This action causes the curved ends of the centrifugal members 11 to be moved in a clockwise direction thereby forcing the member 8 together with the members 7", 7"

7 and carried by a steam packing 20 which so arranged as to permit of a free motion of the member 7.

Cir

and 7 to the left and reducing available opening through the ports 16 and 17 in the steam supfily. The parts are so adjusted that this movement of the member 7 will not take place until the machine has reached and slightly exceeded its normal speed. Upon the machine attaining a speed inaterially above the normal speed, the valves and the member 7 are moved to the left to reduce the steam siipply, tlif'QbY redeem}; the speed. AS the speed reduced. the valves automatically recede, thereby giving a substantially constant speed to the 'poiver h fi-Q- From the above construction, .itwill he noted that all of the govei-nor mechanism, including the nemher 7 and the valves. revol ves or rotates at substantially the same speed as the shaft 2. The member 1. Of course, rotates at the exact s 'veed'ofthe shalt .2 and ordinarily the matter 7 and 8 ivoiild likewise rotate at the same speedasthesliaft 2, However, it will he noted that these parts are driven only the friction between the spring 10 and the meiiihe'r 6 at one end andthe spring 10 and thefiiieitiher 8 at the other end. Unless, therefore, the friction Jbetvveen the packing 20 and the member 7 is greater than the friction between the parts above mentioned, the member Twill rotate at the"same speed as the shaft 2. The mechanism is designed and atljusted so that the speedo'f rotation of the member 7 Will lie the s ziii'le as thatof the shaft 2. r y e Referring to Fig. 2, 2 is ashaft on which is mounted aniembei-QS\vhiclfrotates with the shaft Mountedon the member 2 8 are centrifugal.members 29. These inenibers have projections 30 which are united 'at 31. Bearing against one side of tlie'union 31 'is in spring 32 which tends to hold the memhei's29 in the position shown. The turbine housing 33 (shown only in part) 'hasin line with the shaft 2 austeam passage 34.. This passage opens at 3'5 to'the atmosphere and is connected by the pipe 36 to anystiitable throttle valve. Placed in the passage 35 is a slide 'valve 37. This valve 37 is connected with the union'3l by means of a flexible driving shaft 38.

The-pilot'valve, above described, maylbe connected With any form of control Valve,

the arrangement being such that as the libel-s 29 'fly out-Ward the "control valve ii ll so operate as to decrease the steam supply to the turbine nozzle, and as the m'einber's 29 take their =nori'i'i'al position as shown, the normal su ply 'i'v'ill be furnished to the turbine. By this arrangement the turbine speed will be controlled Within certain limit hich limits will be determined by thee in'ieii't'of the various parts.

From the foregoing description taken in ion faith tie ion o; the device v '1, l he" ve that the op ration of the device of Fig. 2 will be perfectly appare t and therefore neednot be setoiit in detail.

ln'both modifications shown in the'dizi'iv ings there is a smell clearance be'tweeh the valves and their p'ortsto permitofeasy oper ation and also to alloiv 'for a sh gilt v'a ri'atitin from true aligmnent. The flexibleconnection 38 in Q'Woiild permi inthat case or a fg reeiter "var-in "511 from aligniheht Without itlittieu'lty in operation.

@bvioiisly many changes iii det'ail'may be iina-deavitheut iii any way departing from the spirit of iiiy 'iiivention, and I "therefore -do initiidesi'retohe limited t o'the exact deat l sh'oivn and described.

Having frilly described my invention, Wlratl claim as new a'ndde'sireto secure by Letters P'at'eiit is: 1

In a governor meclfaiiism the co'iiibinahonor a rotating shaft, a stationary frame having bearings for said shaft, a frame secured on the end of "said shaft, and rotating therewith, centrifugally "operated members pivoted on said "flaunts, a "statihnary 'hoi'ising secured to said first frame and surroiintling said centrifugal .mei'nbers, saidlionsing; havinga'pa'ssagfie in line With said shaft, a valve member totating coai'ially with said shaft and new ibly connected with respect thereto and adapted to be moved axially of theshaftby said eenmr'ugh members to regitl'ate "the "fiovv' of fluidthrough said passage,"a1id a coiled spring'coaxially arrai'iged with sa id shaft and oppbsing the action of sa'i'd'cen-

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