US1177895A - Governing mechanism for steam-engines. - Google Patents

Description

W. RAYMOND.

GOVERNING MECHANISMYFOR STEAM ENGINES.

APPLICATION FILED 1uLY13, 1914.

1,177,895. Patented Apr. 4, 1916.

3 SHEET8-SHEET I.

Fig. 1.

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W. RAYMOND.

GOVERNING MECHANISM FOR STEAM ENGINES.

APPLICATION FILED JULY I3, I9I4- I 1,177,895. Patented Apr.4, 1916.

3 SHEETS-SHEET 2 THE COLUMBIA PLANOGRAPH (10., WASHINGTON, D. c.

W. RAYMOND.

GOVERNING MECHANISM FOR STEAM ENGINES.

APPLICATION FILED JULY I3. I9I4- 1,177,895. Patented Apr. 4, 1916.

3 SHEETS-SHEET 3.

IIIII QXN/Ime/am: I 3 mm n-Iioz THE COLUMBIA PLANOGRAPH c0.. WASHINGTON, u. c.

UNITED srn'rns Parana orrron.

WARD, RAYMOND, OF EASION, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COMPANY, OF JERSEY GITY, NEW JERSEY, .A CORPORATION OF NEW JI'ERSEY.

GOVERNING MECHANISM FOR STEAM-ENGINES.

j 1 177 895 Specification of Letters Patent. Patented Apr, 4 1916,

' Application filed July 13, 1914. Serial No. 850,547.

To all whom it may concern herein, but such as shown, for instance, .in

Be it known that I, WARD RAYMOND, a the patent to Lentz, #659,892 dated Octocitizen of the United States, residing at her 16,1900. Mounted parallel to the axis Easton, in the county of Northampton and of the cylinder is an eccentric shaft 4 which State of Pennsylvania, have invented a ceris rotated through a rod 5 by a connection, 60

tain new and useful Improvement in Govnot shown, from the main shaft of the en erning Mechanism for Steam- Engines, of gine. Mounted on the shaft 4 are two pairs which the following is a specification. of eccentrics, discharge valve controlling ec- This invention relates to governing mechcentrics 6 which are fixedly mounted eccenanism for steam engines, and more particutrically to the shaft, and inlet controlling ec- .65 larly to governing mechanism'for steam encentrics 7 which are adapted to slide in-, gines of the puppet valve type. wardly and outwardlyon eccentrically ar- Under ordinaryoperating-conditions the ranged squared portions 8 of the shaft to governing of steam engines is effected by vary the throw of the valve and hence the fly ball governors or similar devices which amount of intake. Projecting from the'in- 1710 open or shut the valves according to the nor facesof the eccentrics 7 are lugs 9 to load, there 'being comparatively little variawhich are pivoted short links 10 which are, tion'inthe'speed of the engine. Under some in turn, pivotally secured to arms 11 of bell conditions, however, such, for instance as crank levers 12. The bell crank levers 12 2.0 encountered in driving compressors and are fulorumed on pins 13 secured in lugs 14 a. pumps, the speed of the driving engine must projecting from the shaft 4. Slidably vary through a wide range. Under such -mou-nt'ed in the interio-rof the shaft is an conditions governors of the fly ball type are operating. rod 15 for actuating the. bell not satisfactory, although various methods crank levers 12, the rod 15 having toothed 2 5 of'modifying the action of the fly ball gov-' portions Men-gaging toothed sections 17 on. 80

ernor by means of the compressor discharge the inner arms of the bellcrank'levers 12.

:linepressure have been used with some suc- The rod 15 is extended axially of the shaft cess'in connection with steam valves ofthe 4 into a stationary motor casing 18 which Corliss and Meyer types. abuts against the end bearing 19 of the I The object of the present invention is to shaft. At the extreme end of'the'rod 15 isj'8 provide a governing mechanism particularly a collar oiflange 20 which rotates in a conadapted for use with steam engine valves of plin-g nut 21 which is-attached to a longitu- -the puppet type, whichwill enable the endinal operating stem 22. The stem 22 is :gine to be successfully operated through a moved inwardly by means of a piston 23 Q wide range of speeds. WVith this object in sliding in a cylinder 24 and is moved out- .1 9D

view, a regulating mechanism has been dewardlyby a spring 25 pressing against a vised, a practicalembodiment of which is head 26 secured to the stem 22. Oil is adshown in the accompanying drawings, in (mitted and exhausted from the cylinder 24 which, p 'tomove' thepiston-23, through a pipe 27 .40 Figure 1 shows a plan view of a steam which leads to the governor proper. cylinder provided with :a governing mecha- Considering the operation of the parts nism designed to be controlled by the speed which have been described: lVhen oil is adand discharge line pressure of an air committed to the cylinder 24 the piston 23 will :p-ressor, Fig. 2' shows av longitudinal section be moved inwardly moving the stem 22 and Y. #45011 a larger scale through thexeccent-ric shaft, the coupling nut 21 against the resistance of 1 Fig.- 3 a side elevation partly iii-section of the spring 25. The movement of the couthe end of the eccentric shaft and the govplin-g nut 21 will cause a corresponding lonernor proper, Fig. 4 a transverse section gitudinal movement of the rod '15 without through the governor on the line 55 of affectingjits rotation in any 'way. This lon- 450 Fig. 2, and Fig. 5 a detail view showing the gitudinal movement of the rod 15 will be connection of the follow up lever of the 'govtransmitted through the bell crank levers 1'2 ernor pilot valve. and the links 10 to the eccentrics 7 moving In the drawings is shown a steam cylineach of these eccentrics inwardly toward the -der.1, provided :Wltllll'lltfVEllVt-ES 2;and excenter of the shaft and thus reducing'the admission. The escape of fluid from the cylinder 24 will produce the reverse effect allowing the rod 15 to move outwardly, which will have the effect of increasing the eccentricity of the eccentrics and hence the amount of steam admission The construction and operation of the governor here shown which controls the admission and exhaust of oil frcmthe cylinder 24 is fully described in the copending application of Jones and Treiber, Serial No. 842,146, filed June 1, 1914, and will be only briefly here described.

The governor consists essentially of a casing 28 divided into three chambers 29, 30 and 31. Oil is pumped into the chamber 29 through a pipe 32 which leads from the discharge of an oil pump 33 operated by achain from the shaft 4 and the speed of which, therefore, varies with the speed of the engine. From the chamber 29 the pipe 27 leads to the cylinder 24,- while from the chamber 31a discharge pipe 35 leads to the intake of the pump 33.

Under normal conditions the oil passes from the chamber 29 to the chamber 30 through passage 36 and from thence to the chamber 31' through the adjustable aperture 37, a small part of the oil also passing directly from chamber 29 to chamber 31 through the adjustable aperture 38. The flow through the apertures 37 and 38 under full load conditions is just equivalent to the amount of fluid discharged from the oil pump 33 at the engines maximum speed. If the speed of the engine exceeds this maximum, oil will pass from the chamber 29 through the pipe 27 to the cylinder 24 moving the rod 15 inwardly and cutting off the steam admission the necessary amount. The flow of oil through the passage 36 is, however, controlled also by the pilot valve 39 which is controlled by the pressure in the compressor receiver in the following manner: From the receiver of the compressor, (not shown), a pipe 40 leads to the lower end ofthe cylinder 41 in which slides a piston 42 having a projecting stem 43. The stem 43 engages a lever 44 which is so balanced by means of a weight 45 and a spring 46 that it will allow the piston 42 to move upwardly at a certain predetermined. pressure in the receiver. Pivoted to this lever 44 is a bell crank lever 47. To one arm of the lever 47 is linked the valve 39,

while to the other arm is linked a follow up lever 48, the lower end of which is fulcrumed on a pin 49 onthe casing 28 and the upper end of which is secured by a yoke 50 and pin 51 to the stem 22 which operates the rod 15. \Vhen the pressure in the compressor receiver reaches an amount predetermined by the balance of thelever 44 the piston 42 will move upwardly raising the lever 44 and the valve 39 and shutting off theflow of oil through the passage 36. The escape of the oil being thus prevented it will pass through the pipe 27' to the cylinder 24 and move the piston 23 and the rod 15 inwardly cutting down the speed of the engine. The movement of the piston 23 will, however, be transmitted back to the valve 39 to again open erning mechanism furnishing a supply of fluid varying with the load on the engine could be used for operating the piston 24,

and it is to be understood that while they present showing and description disclose only one specified modification of the invention, other forms and modifications are in cluded in the spirit and scope of the inven tion as expressed in the claims.

What I claim is 1. In a steam engine governing mechanism, a shaft, valve operating eccentrics movably mounted on said shaft, a fluid operated motor operatively connected with said eccentrics, and means for supplyingfluid to said motor in accordance with the load on the engine.

2. In a steam engine governing mechanism, a shaft, valve operatingeccentrics movably mounted on. said shaft, levers to move said eccentrics, an operating rod for moving said levers extending longitudinally of said shaft, a fluid operated motorfor moving said rod, and means-for supplying fluid to said motor in accordance with the load on the engine.

3. In a steam engine governing mechanism, a shaft, valve operating eccentrics on said shaft, an eccentric controlling rod extending longitudinally of said shaft, means to transmit longitudinal movement of said rod to vary the throw of said eccen trics, a fluid operated motor for moving said rod, and means forsupplying fluid to said motor in accordance with the load on the engine.

4. In a steam engine governing mechanism, a hollow rotatable shaft, eccentrics movably mounted on said shaft, valve rodsoperated by said eccentrics, an eccentric opcrating rod extending longitudinally axially of said shaft, and having operative connections with said eccentrics to vary their throw, a fluid operated motor for moving said rod, and means for supplying fluid to said motor in accordance with theload on the engine. 7

5. In a steam engine governing mechanism, a. rotating eccentric shaft, .carryinglSO valve operating eccentrics sliding transversely thereon, levers pivoted in said shaft and linked to said eccentrics, a lever operating rod sliding longitudinally inside of said shaft, means to move said levers from said rod, a fluid operated motor for moving said rod and means to admit fluid to said motor in accordance with the load on the engine.

6. In a governing mechanism for steam engines, an eccentric carrying shaft having eccentric squared portions, valve operating eccentrics sliding on said squared portions, bell crank levers pivoted in said shaft each having one end linked to said eccentrics and the other provided with a toothed portion, a rod sliding longitudinally of said shaft and having teeth thereon engaging said toothed portions of said bell crank levers, a stationary fluid motor for moving said rod longitudinally of said shaft having a rotary connection with said rod and means to admit fluid to said motor in accordance with the load on the engine.

7. In "a steam engine governing mechanism, a hollow rotatable shaft, eccentrics movably mounted on said shaft, valve rods operated by said eccentrics, an eccentric operating rod extending longitudinally axially of said shaft, and having operative connections with said eccentrics to vary their throw, a motor for operating said rod comprising a stationary cylinder mounted coaxially with said shaft and having a piston sliding therein, a swivel connection between said piston and said eccentric operating rod, resilient means to move said piston in one direction, and means to admit fluid to said cylinder to move said piston in the other direction an amount varying with the load on the engine.

In testimony whereof, I have hereunto set my hand.

WARD RAYMOND.- Witnesses:

CARL W. OMAN, HARRY L. VAN BILLIARD.

Copies of this patent may he obtained for five cents each, by addressing the "Commissioner of Patents, 7

Washington, D. G.

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