US1233276A - Speed-governor. - Google Patents

Description

cpv. KERK. SPEED GOVERNOR. APPLICATION FILED MAR. 23. 1914.

L283,2Y6 Patented July 1o, 1917.

2 SHEETS-SHEET l.

Houmt (1 "c.v. Km.

SPEED GOVERNOR. APPLICATION FILED MAR. 23. 1914.

. Patented July 10, 1917'.

2 SHEETS-SHEET 2.

Sen/hoz @Zwam /f CHARLES VOLNEY KEER, 0F WELLSVILLE, NEWYORK, ASSIGNOR TO THE AMERICAN WELL WORKS, 0F `AURORA, ILLINOItA CORPORATION OF ILLINOIS.

SPEED-GOVERNOR.

Specification of Letters Patent.

Patented July l0, 1917..

Appli-cation led March 23, 1914. Serial No. 826,541.

To all whom 'it may concern.'

Be it known that l, CHARLns V. KERK, a citizen of the United States, residing at Wellsville, in the county of Allegany and State of New York, have invented certain new and useful Improvements in Speed- Governors, of which the following is a specification.

This invention relates to new and useful improvements in governors, and more particularly to that class designed for use in connection with elastic fluid turbines.

An-object of this invention is to provide a governor to be mounted on the rotary shaft of a turbine or the like in operative connection with the motive fluid controlling valve and to perform the usual functions of a governor by utilizing the centrifugal force at high speeds of leaf spring-s disposed parallel to the shaft, thereby dispensing with the usual governor weights and avoiding 'the heavy pressures on pivots or knife edges due to .the centrifugal force of such weights acting throughk levers upon the usual governor springs.

Another object of this invention is the provision of mechanism for operatively cor.- necting the governor with the governor valve for the purpose of reciprocating the latter in a line parallel 'to that of the drive shaft of the turbine to which the .said govern orv is applied.

A further object of this invention is to improve and simplify devices of this character, rendering them comparatively simple and inexpensive to manufacture, reliable and ellicient in use, and readily operated.

With the above and other objects in view, this invention resides in the novel features 'of construction, formations, combinations, and arrangement of parts to be hereinafter more fullydescribed and particularly pointed out in the appended claims. l

In the drawings, in which similar reference characters indicate the same parts in the several figures,

Figure 1 is a longitudinal sectional view of my improved governor, taken on the linel I-l ofFig.2;, y

' Fig. 2 is an end view of Fig. l;

Fig. 3 is a transverse sectional view on an enlarged scale taken on the line Ill-Ill yof Fig. 1;

Fig. 4 is a longitudinal sectional View taken through the governor, on an enlarged scale;

Fig. 5 is a transverse sectional view, taken on the line V-V of Fig. 1, on an enlarged scale; and

Fig. 6 is a diagrammatic view illustrating the positions of the link connections between the governor and governor valve.

Referring to the accompanying two sheets of drawings, the numeral 1 designates in general the intake end of a turbine in which is disposed the usual rotary drive shaft 2, which passes outwardly through the stuffing box 3 and bearing ll. The casing head of the turbine 1 is provided with the intakev opening 5A which connects with the steam chest 6,- through the passage 7, said chest being in communication with the steam supply by the pipe 6.

A sleeve 8 is suitably attached by a key or otherwise, to the shaft 2 within the bearing l, and projects outwardly therefrom, terminating ina hood 9 rigidly connected to the shaft 2 through the medium of the sleeve 8, andy rotatable therewith. The shaft 2, withinthis hood, is slightly reduced as at 10, and slidable upon this reduced portion is a sleeve 1l provided with terminal peripheral flanges 12, 12, disposed inwardly to engage the shaft, thereby spacing the major portion of the sleeve from said shaft, and obviously reducing friction.

'13, and formed withV a recess 14, designed to receive the terminal point of a pin 15 disposed within said bifurcated end 13. A lateral pin 16 passes through the outer end of the slidable or movable sleeve 11 and inner end of the pin 15, connecting the same rotatably to the shaft 2. The outer end of the pin l5 passes through a recess 17 in the pivot block 1 8 and rotates against the adjustable bearing block 19, threaded in said block-1S. From this construction it will be readily seen that the pin 15 moves longitudinally in axial alinement with the shaft 2 upon movement of the sleeve 11.

A collar 2O is formed upon the inner end `of the sleeve 11 while a corresponding colf 9 found necessary,or should any ofthe springs 21 are notched to receive the laminated or leaf springs 24, each of which comprises a bundle of thin strips of suitable metal disposed parallel jto the shaft 2, and held in position by the looking ringsl25 which are placed over the collars 20 and 21 andretained thereon by any suitable means. By thisV construction any kone or more of the springs may be removed andy stronger or weaker springs substituted therefor, if

become broken or injured', they may, be readily taken outand new ones put in their placei. y V' It will also be seen, thesaid springs `24 not only form theiretractile means of the Yusual form. ofthe governor but at the same time alsov perform the same function as weights for actuating. the governor.

-.An oil Acup 26 is attached Yto the pivot f block 18 and'communicatesrwith'the recess 17 from which the oil or other lubricant will 1 pass through thepassages `27 (see Fig. 3)

in the pin 15 to lubricate the various operate ing parts. Outwardly extending arms 28 project fromthe steam chest 6 and support a bearl1 'isha' collar 34 arranged to seat one end of a ing29 in whichy an operating rod 30 is slid ably located. This rod 30 isinalinement with the stem 31 of the valve 32 disposed Y withinthe steam rchest 6 for reciprocating Amovement yin ajline parallel to the axis of the shaft .2., The 'valve 32 Vis flexibly attached to the stem 31 and slides'ink a sleeve 3.2of' the samermaterial as thevalve 32,

` 'said sleeve-32 being heldin place by the cover of the'steam chest. The stem 31 voperates through a sleeve 33 secured rigidly .to thenhead of the steam chest, while attached to thisl sleeve and adjustable thereon tensioning spring 35, the opposite end of 'which is supported bythecollar 36Y carried bythe above mentioned rod 30, which latter -at this point'is attached to the valve stem 31. A )second pair of collars 37, 37 are adustable upon the rod 30 and support a .yoke

thenumber 43. These links'39, 40, 41 and 42S form a pfantograph, as shown in Fig-J6, by which if the outer end of the pin 115 or block 18 is moved Y'in apstraight line, the lower lends 'ofthe links 39 and yyoke 38, will -move in 'a line parallel: thereto Yconsequently when .the pivot block 18 is moved in a line parallel to the af'risofth'e 'shaft 2, the yoke Y 738 will be movedin aV line parallel to the axisxof :the shaft 2-.jan'd Yalsovpa-rallel to the axis of the valve stem'31, manifestlyreciprocating the valve 32 in its proper line of operation. This action of the links 39, 40, 41 and l42 will follow as clearly indicated in the line diagram illustrated in Fig. (i, which shows the positions of the pantograph and consequently if points A, B and C are in a straight line, and point B is ixe'd,if A is moved to A', D will move to D, E to E', F to F, and C to C', and therefore line C-C is a straight line parallel to the line A-A, for the reason that the triangles A VB E, and A C D, are similar, and the figure B E D F, is a parallelogram. This form of construct-ion of levers or links makes it possible to reach around a corner, as it were, to attach a centrifugal governor to a controlling valve.

The collars 37 have a slight clearance, which overcomes any alinement troubles. A change of speed while running can be effect` ed by adjusting the collars or lock nuts 3T. Spring tensionv yin the spring 35 varies inversely with 'turbine load and combines with steam pressure on stem 31 which varies di,- rectly with the load to form a practically constant pressure on the governor connections to-take up back-lash or lost motion. It will be noted that in operation one cutoff edgeV of the valve 32 Vreachesl its seat 'earlier than the other, which gives better control of light loads.

The operation o f the device is as follows:

At high speed the combined weight and springs 24 are bowed outwardly as indicated by the dotted lines of Fig. 4, and may touch the hood 9. This movement of the springs 24 forces the sleeve 11 outwardly carrying with it thepin 15 and pivotpblock 18, thereby operating the valve 32 through the medium of the links 39, 40, 41 and 42 to change the speed to the desired degree.

For moderate speeds, or when small speed variation with th'e'ch'ange of load is desired,

removable weights 44, as indicated in dotted lines inV Fig. 4, can` be attached to the springs 24. I

Obviously, this invention uses the centrifugal force of the springs which increases with the squarel of thespeed. The power or resistance of the combined weight land springs increases withthe number and .thickness ofthe springs `24 which are employed. Defiecton 'of said springs 24 varies with the fourth power of the length of the leaf springs, and inversely with the square of the thickness of the leaf of each spring. A great elasticity of, design is thus secured, and pivots under high pressures are entirely avoided. p

From the foregoing disclosures, taken in connection with the accompanying drawings, it will be manifest that a governor such as described is provided, which will fulfill all th'e necessary requirements of such'a device, .it being understood that various -minor changes in the specific details of construction can be resorted to Within the scope of the appended claims Without departing from, or sacrificing any of, the advantages of the invention.

What I claim is l. A governor for turbines or the like, comprising a rotary shaft, a centrifugal governor on and rotating With said shaft, a motive fluid controlling valve, and a series of links forming a parallel motion connecting said governor and valve for moving the valve in a line parallel to the axis of the ro tary shaft.

2. A governor for turbines or the like, comprising a rotary shaft, a centrifugal governor on and rotating with said shaft, a motive fluid controlling valve, a member longitue dinally slidable on the shaft and connected to the governor, and a series of links arranged and connected with the slidable member and the valve for moving said valve in a line parallel to the axis of the rotary shaft.

3. A governor for turbines or the like, comprising a rotary shaft, a centrifugal governor on and rotating With said shaft, a motive fluid controlling valve, a member longitudinally slidable on the shaft and connected to the governor, a pivot block connected to and moving with the longitudinally slidable member, and a series of links arranged in the form of a pantograph connected With the pivot block and the valve for moving said valve on a line parallel to the axis of the rotary shaft.

4. A governor for turbines or the like, comprising a rotary shaft, a centrifugal governor on and rotating with said shaft, a motive fluid controlling valve, an operating rod connected with the controlling valve, a yoke connected to the operating rod, a member longitudinally slidable on the shaft and connected to the governor, a pivot block connected to and moving With the longitudinally slidable member, links connected to the pivot block and yoke and to each other, a fixed support, links pivoted to said support and at intermediate portions of the rst mentioned links whereby said valve is moved on a line parallel to the axis of the rotary Shaft.

In testimony whereof I affix my signature in presence of tvvo witnesses.

CHARLES VOLNEY KERR.

Witnesses:

GEORGE F. GEBHARDT, E. A. BURRoWs.

Copies of this patent may be obtained for ve cents each, 'by addressing the Commissioner of Patents, Washington, D. C.

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