US953590A

US953590A - Automatic stop-governor.

Info

Publication number: US953590A
Authority: US
Inventors: Joseph Breslove
Original assignee: Westinghouse Machine Co
Current assignee: Westinghouse Machine Co
Priority date: 1907-09-16
Filing date: 1907-09-16
Publication date: 1910-03-29
Anticipated expiration: 1927-03-29

Description

J. BRESLOVB,

AUTOMATIC STOP GOVERNOR.

APPLIUATION FILED JAN.13, 1906. RENEWED SEPT. 16, 1907.

Patente 1%1229, 1910.

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7 m I 7 g 45 INVENTOR ATTORNEY J. BRBSLOVE.

AUTOMATIC STOP GOVERNOR.

APPLIOATION FILED JAN.13,1906. RENEWED s31":: 16, 1907.

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WITNESSES: INVENTQR Ammawn GHAHAM co PHOTO-LITHOGRAFHERQ WASHINGTON u c 1 ma ve 7N itill i a JOSEPH BRESLOVE, OF PITTSB UEG,

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'zihl'iif it, ASSIGNOR TG TEE W'ESTZNGHGUSE LIQN GE PAIJITSYLVANIA.

AUEGMATIC STQP-GG'i ER-NGR.

Application filed January 13, 1306. Serial No.

To all whom it may concern:

Be it known that I, JosicrI-I Brinsnovn, a citizen ot the United States. and a residentot Pittsburg, .in the county of Allegheny and State of Pennsylmnia, have invented a new and useful Improvement in Auto matic St'O] )GOVl?l101'S, of which the tollowing is 2 specification.

This invention relates to governors and more particularly to automatic stop governors.

An object of this invention is the production of comparatively simple and etlicient means for automatically cutting oil the supply of motive tluid to an engine when the engine exceeds a predetermined speed.

It further object is the production oi an automatic stop governor in which means are utilized such that the tluid supply,v atter being automatically cutotl', will remain so until the goveri'ior and governor mechanisms are readjusted.

Elastic fluid turbines and all other types of engines are ordinarily provided with speed governors, the functions ot which are to automatically proportion the steam supply to the engine in ac'ordance with the load demand. It is also customary to provide auxiliary or automatic stop governors which are effective in shutting oitt the supply ct motive l'luid to the engine or turbine when the engine. cue to some extraordinary circumstances, exceeds a speed beyond which its operation would prove dangerous. In turbine practice it is necessary. because of the excessive speeds encountered. to provide adequate and effective means for lubricating all the running parts, and it has been an object of my invention to provide an automatic stop governor adapted to run in oil. and one in which. the friction between the moving parts is as tar as possible eliminated.

These and other objects I attain in a gov ernor embodying the teatures described in the specification and illustrated in the accompanying drawings. throughout the several views of which similar elements are denoted by like characters.

In the drawings Figure 1 is a sectional elevation of a fluid actuated cut-oil valve utilized with this invention. Fig. 2 is a sectional elevation of a governing device controlling the operation of the eutoff valve. Fig. is a section along the line A A of 2. is a section along the line ll of i 2. 5 is an elevation of a detail of this invention. Fig. 6 is a section along the line D l) of Fig. .1.

t fhrougho-ut the further des ription of this invention it will he described in connection with an elastic fluid turbine without any idea oilimiting its application to such engines.

Located conveniently in the motive fluid supply line of a turbine is a valve casing T. which is provided with a tluid inlet port 8 and an outlet port 9, and within which a piston valve 10,. adapted to control the tlow ot motive Fluid through the valve casing, operates. i valve stem 11. is connected to the. piston v: lve l0 and projects through an end all 12 ot the casing 7 into a valve motor cylinder 13, the casing let ot' which is secured to the casing T. The valve motor cylinder 13 is bored to two diameters and the valve stem 11 carries two pistons, 15 and 16. which are located. in the diit'erent size bores. Each piston preferably water grooved to preserve a fluid tight iit within the cylinders and a chamber 17 is located above the piston 15. A bvpass 18 leading from the end wall 12 of the valve casing 7 through. the casing l l; coin'iects the chamber 17 with the interior of the valve casing 7 and is provided with a hollow plug 19. adapted to insure the port 18 registering with the port below it when the parts are assembled. A bushing 21 surrounding the stem 11 and located in the end wall 12 oi. the valve casing T so arranged that motive liuid from the interior of the valve casing is allowed to leak through the bushing into the cylindmr 1 3 and below the piston it pipe 22 entering the c vlindcr 13 at a point below the piston 17 connects the cylinder with the atmosphere and is provided with an automatically actuated valve 23, the operation of which. will hereinafter be descriliied. A rod 24. mounted on the piston 16 extends through an opening in the casing let forming a visible indicator ot' the position of the valve 10.

Assuming that the pipe -2 is closed to the. atmosphere and that the interior 01 the valve casing '7 is subject to fluid pressure; it is apparent that the pressure below the piston 15, due to the leakage of fluid through the bushing 21 will hold the valve open against the fluid pressure in the chamber 17, because of the difference of effective areas on the opposite sides of the piston 15. It will be seen, however, that when the pipe 22 is open to the atmosphere and the motive fluid in the cylinder 13, below the piston 15, is exhausted, the piston 15 will be forced down by the fluid pressure in the chamber 17 and the valve 10 will be closed.

The controlling device for operating the valve 10 comprises an inertia weight 25 pivotally mounted on a bolt 26, carried by a rotatable housing 27, which is mounted on a shaft 28 and is driven through a flexible coupling 29 by the turbine shaft 31. The shaft 28 is journaled in a bearing 32, which is formed integrally with the bearing housing 33 of the turbine shaft. The weight 25 is normally held by a helical spring 34 against a stop lug 35, formed integrally with the housing 27. One end of the spring 3 1 is mounted on a spring block 36, which is provided with a mounting and adjustable bolt 37, adapted to be secured to the housing 27. The other end of the spring is mounted on a support 38 with which the weight 25 is provided, and the arrangement is such that the pull of the spring is transmitted to the weight through a knife-edge 39 with which the mounting portion is provided. The

weight is so located that its center of gravity is slightly eccentric to the axis of rotation of the housing and the arrangement is such that the centrifugal force occasioned by the rotation of the housing causes the weight to swing about a. knife-edge ll with which the bolt 26 is provided. The weight is provided with an outwardly extending tripping lug 42, the axis of which, for the normal position of the weight, coincides with the axis of ro tation of the housing, but as the weight moves outward, due to the increasing centrifugal force, the lug will revolve about the axis of rotation in circles, which increase in diameter as the speed of the turbine in creases, until at some excessive speed it con tacts with a stop lug 43 with which the weight housing is provided.

A casing 4.1 mounted on the bearing housing 33 of the turbine shaft incloses the weight housing 2'7 and is adapted to be filled with oil or other lubricant, which may be conducted from the bearing housing or through suitable conduits leading from the turbine lubricating system. A valve 23 is mounted on the casing 11 and is provided with a port 45 which communicates with the pipe 22, and an exhaust port 46 which communicates with the atmosphere through a pipe L7. A valve-disk a8 is located within accumulated Z the valve casing and is adapted to close the port 15 to the atmosphere. The valve-disk a8 is provided with a valve stem 49, on which a disk 50 is mounted, which operates in a cylinder 51. A helical spring 52 mounted on the disk 50 is located within the cylinder 51. and is connected to a spring block 53, which is provided with a bolt 5% extending out of the cylinder through a suitable opening.

A lever fulcrumed on a pin 56, which is suitably mounted on a lug 57, is provided with contact arms 58 and 59, and an outwardly extending arm 61. The arm 58 contacts with the bolt 5% and through the spring :32 controls the operation of the valve 23. The arm 59 contacts with, and is held in an operating position by, a finger 62 of an adjusting or locking device 63, which extends through the casing 44 and is suitably journaled on the lug 57.

A releasing pin 6t of the adjusting device 63 is located within the casing H and is arranged to contact with the lug 42 of the weight 25 for certain positions of the weight, and finally, for some predetermined and excessive speed of the turbine, the lug 42 is moved to such a position that it contacts with the releasing pin 6% and the finger 62 will release the lever lVhen the arm 59 of the lever is in op erating position, in contact with the finger (52, the arm 58 will contact with the bolt 54; and hold the valve closed against the pressure of the confined fluid in the cylinder 13 and thereby hold the valve 10 open. hen the lever is released through the agency of the lug 42 and the adjusting device, the accumulated pressure of the cylinder 13 moves the valve disk 48 to such a position that the pipe 22 is thrown into communication with the exhaust port t6, the valve 10 is then closed by the unbalanced fluid pressure in the chamber 17, and the motive fluid supply to the turbine is cut off.

The pipe and the exhaust port a6 are relatively large in comparison with the leakage opening through the bushing 21, and therefore the flow of motive fluid through the chamber 13 will be unrestricted and the valve 10 will remain closed until the lever and the tripping device 63 are readjusted.

A contact pin (55 is so located on the lug 57 that a delicate adjustment of the tripping and adjusting device is insured and the tension of the spring may be adjusted by the bolt 54 to accord with the pressure in the cylinder 13.

The operation of the weight 25 may be controlled by adjusting the tension of the spring 3% through the bolt 37, and since all the moving parts operate on knife-edge connections variations of the temperature or of the conditions of the lubrication will not esaeeo materially affect the operation. of the weight and coi'isequently the ultimate speed of the turbine may be gag-ed with close precision. The housing 27 is so located and arranged that it will not excessively agitate the oil or other lubricant contained in the casing 1T, even while running at a high rate of speed. This characteristic is quite essential as undue heating of the lubricant proves very objectionable. The housing 2'? is so arranged that, with the exception oi the mounting bolts, no extending and retarding surfaces are presented to the oil in the easing a l and the tripping lug e operates so near the axis of revolution that it does not add. appreciable resistance to the rotation of the housing or agitate and heat up the lubricant an objectionable amount. The spring 34 is z ranged to hold the weight normally against the lug 35 and the knifeedge 41 and under such conditions the triotion of rest will not be appreciably greater than the friction of motion.

It is obvious that many variations and changes in detail and construction of the device would readily suggest themselves to a person skilled in the art and still fall within the limits and scope of this invention.

The invention is not limited therefore to the exact details of construction and arrai'igement above set forth.

hat I claim a new and useful and desire to secure by Letters Patent is:

1. In combination with a cut-off valve, a speed-responsive device, adapted to close said cut-oh valve, comprising a. rotatable casing, an inertia weight mounted in said casing, a spring resisting the action of said weight and knife-edge connection between said weight and said casing, and said weight and said spring.

2. In combination with a cut-oil valve. aspeedi'esponsive device adapted to close said valve, comprising a rotatable casing, an inertia weight mounted in saic casing, a spring resisting the operation of said weight and a stationary casing inclosing said speed responsive device.

3. In combination with a. cut-oil valve, a speed-responsive device adapted to close said valve, comprising a rotatable casing, an inertia weight mounted in said casing, a spring resisting the action of said weight and means for immersing said speed-responsive device in a lubricantbath.

4:- In combination with a cut-oil valve, a rotatable casing, a speed-responsive device contained within said casing, means dependent on said speed-responsive device for closing said cut-off valve and means for immersing said casing and said speed-responsive device within a lubricant bath.

5. In combination with a cut-oil valve, an auxiliary valve adapted to control the I i l l l l l I l i operation of said. cutoff valve, a speed-re sponsive device adapted to control said auxiliary valve, comprising a rotatable casing, an inertia weight mounted on a knife-edge provided in said casing, a spring resisting the operation of said weight mounted between said casing and a ln'iit'e-edge on said weight.

6. In combination with a cut-off valve, an auxiliary valve adapted to control the operation ot sait cut-off valve, a locking device for said auxiliary valve, comprising a lever adapted to close said valve, a linger adapted to hold said lever in the closing position, a tripping device incloscd within a casing on which said auxiliary valve and said locking device are mountecha releasing pin within. said casing connected with said finger and adapted to be moved by said tripping device to thereby release said lever, open said auxiliary valve and close said cutoff valve.

7. In combination with a cut-oil valve, an auxiliary valve adapted to control the operation of said cut-oil valve, a locking device for said auxiliary valve, comprising a lever adapted to close said valve, a finger adapted to hold said valve in the closing position, a tripping device comprising aspeed-respon sive agent incloscd within a casing upon which said auxiliary valve and said locking device are mounted, a releasing pin within said casing and connected with said linger adapted to contact with said tripping device and release said lever, opensaid valve and thereby close said cut-oil valve.

8. In combination with a cut-off valve, an automatically actuated controlling valve communicating with said cut-otl valve, a le ver controlling the operation of said con trolling valve, a finger contacting with said lever, a tripping device mounted within a rotatable casing comprising a pivotally mounted inertia weight provided with an extending lug adapted to contact with a pin connected with said finger and means for immersing said tripping device in a lubricant bath.

9. In combination with a fluid-actuated cut-oil valve, an automatically-actuated con trolling valve communicating with said cutofi valve, a lever adapted to close said controlling valve, a linger contacting with and adapted to hold said lever in the closing position, a tripping device, comprising an inertia weight mounted in a rotatable casing and provided with an axially extending contact lug incloscd within a stationary casing exterior to which and on which said controlling valve, said lever and said finger are mounted, a. releasing pin within said casing and connected with said finger adapted to be moved by said contact lug and thereby release said lever, open said auxiliary valve and close said cut-off valve and means for immersing said tripping device in a lubricant bath. 7

10. In combination with a cut-cit valve, a speed responsive device adapted to control the operation of said valve, said speed responsive device comprising a rotatable memher and an inertia weight mounted eccentrically on said member and adapted to move across said member under the intluence of centrifugal force.

11. In combination with a cut-off valve having an open position and a closed position but no intermediate position, a speed responsive device adapted to control the opera tion of said valve, comprising a rotatable casin an inertia weight mounted within said casing and a spring resisting the eccentric motion of said weight, incident to the centrifugal force developed by the rotation of said casing.

12. in combination with a cut-off valve, a speed responsive device adapted to control the operation of said valve, comprising a rotatable casing, an inertia weight mounted within said casing, a spring resisting the action of said weight and means for introducing lubricant into said casing.

13. In combination with a cut-off valve, a rotatable casing, a speed responsive device contained within said casing, means dependent on said device for closing said cut-01f valve and means for introducing lubricant into said rotatable casing.

1a. In combination with a cut-oil valve, an auxiliary valve adapted to control the operation of said cut-oft valve, a speed responsive device adapted ,to control said auxiliary valve, comprising a rotatable casing, an inertia weight mounted within said casing, a lug carried by said weight and adapted to move eccentrically of the axis of rotation of said weight to operate said auxiliary valve.

15. In combination with a cut-ott valve, a speed responsive device adapted to control said valve, comprising a rotatable casing, an inertia weight within said casing, a lug carried by said weight and adapted to move eccentrically of the axis of rotation of said weight to close said valve.

16. In combination with a cut-oil valve, a controlling valve communicating therewith, a lever controlling the operation of said con trolling valve, a finger contacting with said lever, and a tripping device mounted within a rotatable casing and comprising a pivotally mounted inertia weight provided with an extending lug adapted to contact with a pin connected with said finger to open said controlling valve.

1'7. In combination with a cut-ofi valve, a controlling valve operating in conjunction therewith, a lever controlling the operation of said controller valve, a finger contacting with said lever, and a tripping device mounted in a rotatable casing and comprising a pivotally mounted inertia weight provided with an extending lug which moves eccentrically of the axis of rotation of said casing to contact with said finger and operate said controlling valve.

18. In combination with a cut-oil valve, a speed-responsive device, adapted to close said cut-off valve, comprising a rotatable casing, an inertia weight mounted in said casing and a spring resisting the action of said weight and knife-edge connection between said weight and said casing.

19. In combination with a cut-oif valve having an open position and a closed position but no intermediate position, a speed responsive device adapted to control the operation of said valve comprising a rotatable member, a weight pivotally mounted on said member and adapted to move across said member under the influence of centrifugal force and a spring between said member and said weight adapted to resist the motion of said weight.

20. In combination with a cut-0E valve, an auxiliary valve adapted to control the operation of the cut-off valve, a speed responsive device adapted to control said auxiliary valve, comprising a rotatable member and an inertia weight mounted on said member, a lug carried by said weight and adapted to move eccentrically of the axis of rotation of said. weight to operate said auxiliary valve.

21. In combination with a cut-01f valve, a speed responsive device adapted to control said valve comprising a rotatable member, an inertia weight mounted on said member and provided with a lug adapted to move eccentrically of the axis of rotation of said member to close said valve.

In testimony whereof, I have hereunto subscribed my name this 11th day of January, 1906.

JOS. BRESLOVE. lVitnesses CHARLES W. MOGHEE, JNo. S. GREEN.