US1108183A - Pump-governor. - Google Patents

Description

K. A. KENDRIGK. PUMP GOVERNOR.

APPLICATION FILED OCT. 11, 1913. 1,108, 183. Patented Aug. 25, 191

2 SHEETS-SHEET 1.

THE AORRIS PETERS 60.. pHcra-LITHQ, WASHINGTON, D c

, K. A. KEN'DRIGK.

PUMP GOVERNOR. APPLICATION FILED O0T.11

Patented Aug. 25, 191 1 2 SHBETSSHEET 2.

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THE NORRIS PETERS CCL. PHOTO LI1HO., WASHINGTON, 0. C4

KARL A. xnnnnrcx, or nn'rnorr, MICHIGAN.

PUMP-GOVERNOR.

Specification of Letters-Patent.

Patented Aug. 25, 1914.

Application filedOctober 11, 1913. Serial 110 794 574.

To ad whom it mag concern:

Be it known that I, KARL A. KENDRICK, a citizen of the United States, residing at Detroit, in the county of Wayne, Statev of Michigan, have invented certain new and useful Improvements in Pump-Governors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to pump governors and is especially designed for use in connection with steam pumps for supplying and regulating the delivery of water under pressure to a steam boiler, and consists in the construction and arrangement of parts hereinafter more fully set forth and pointed out particularly inthe claims.

The object of the invention is to provide simple and efiicient means for controlling the action of a steam pump in delivering water. under pressure to a boiler in such manner as to insure the delivery of water into the boiler at a fixed or predetermined pressure, in which the steam pressure of the boiler utilized in driving the pump may vary or fluctuate without affecting the efiiciency of the pump in its discharge'oi' water into said boiler under the'given pressure desired, provision also being made for automatically starting and stopping the action of the pump simultaneously with the opening and closing of a valve within the feed water line between said pump and boiler.

The above object israttained by the e ployment and arrangement of the construction and mechanism illustrated in the accompanying drawings, in which Figure 1 is an end elevation of a boiler showing the pump and pump governor connected thereto and to ether by lines of steam and water pipes as the parts would appear in position for operation. Fig. 2 is a sectional view through the base of the pump governor taken on dotted line 2--2 of Fig. 1, showing in elevation the arrangement. of a group of actuating levers contained thereline 33 ofFig. 2. Fig. 4 isa transverse section through the rotary steam valve and its chamber taken on dotted line 44 of Fig. 3. g I y eferring to the drawings by the characters of reference marked thereon, 1 represents an ordinary steam boiler which is connected in the usual manner by a water pipe centrally therethrough dividing said cylinder into two separate chambers 9 and 10, and communicating respectively with said chambers through the ends of said cylindrical housing are apertures 11 and 12, through which the parts of the mechanism may be passed to the interior to facilitate their assembling, said apertures being provided respectively with flanged end caps or closures 13 and 14 secured thereto by cap screws 13 and 1 1 which pass through said flanges and are threaded into the ends of the housing. Extending centrally through the chamber-,9, parallel with the partition 8 thereof and formed integrally with said housing, is a second partition 15 which divides said chamber and forms a second chamber 9 therein, and formed centrally through said partition concentric with the aperture 11 of the housing is a screw threaded aperture 16, into which one end of an exteriorly threaded cylindrical valve case 17 is firmly. screwed and seated. Said valve case is provided with a plurality of peripheral apertures or steam ports 18 formed diametrically through the wall thereof at intervals of its circumference which communicate with the chamber 9, and through the open end 17 of said valve case with the chamber 9.

Fig. 3 is a central vertical section through the pump. governor taken on dotted Seated Within the valve case 17, and forming a steam tight joint between its periphery and the inner perimeter of said valve case is a cylindrical valve 19 having a plurality of steam ports 20 formed in the periphery thereof at intervals of its circumference adapted to register and communicate with the ports 18 of the valve case 17, said ports also communicating with a plurality of cylindrical apertures or ports 21 formed in the body of said valve in line with said ports 20 therein, and communicating at their open ends through the aperture 17 of the valve case with the chamber'9 of the housing (see Figs. 3 and l). Saidvalv'e is rigidly mounted upon one end of a shaft or valve stem 22, the opposite end of said valve stem being journaled to rotate concentric with said valve case in an ordinary stuffing box hearing 23 formed through the partition 8, said valve being held against end movement within said valve case by means of a collar at on the valve stem 22 which engages one end of the bearing 23, and a valve case plate 25 which closes the outer end of the valve case'and engages the conical end 26 of said valve stem, being held in contact with the end of said valve case by means of the countersunk screws 27 which pass through said plate and are threaded into the end of said case, as clearly shown in Fig. 8. The free end of the valve stem extending into the chamber 10 terminates in a shouldered screw threaded stem 28, and secured rigidly upon said shouldered end is a crank-arm 29 which is held in engagement therewith by means of the jam nut 30 screwed tightly thereon (see Fig. 3). Pivotally attached at one end to the free end of said crank-arm by means of a stud 31 is a link 32, the opposite end of which is pivotally attached by means of a stud 38 to an actuating lever 34 near its fulcrumed end. The fulerumed end of said lever is pivoted by means of a stud 85 to a threaded lug or nut 36, said nut being adjustable vertically upon a screw threaded stem 37 which is journaled at its lower end in the lower wall of an extended housing 38 formed on one side of the housing 7 and h aving a hollow interior communicating with thechamber 10 therein, the upper end of said screw threaded stem being journaled inan ordinary stufling box 39 which is seated in the upper wall of the extended housing 38, the extreme upper end of said threaded stem being rovided with a squared shoulder 40 for the reception of a wrench by means of which said stem may be turned.

The traveling end of the lever 34 is pivotally connected by means of a stud ll to the lower end of a link 42, while the upper end of said link is pivotally connected by a stud 43 to the lower end of a piston rod 44 through the medium of a forked fitting 45,

the sides of which embrace the end of the link 42 and receive the stud 43 therethrough, while the body of said fitting is threaded and receives the threaded end 4:6 of the piston rod ist, as clearly shown in Figs. 2and 3.

The upper end of th piston rod 4a is provided with a shoulder or head l? which is contained within a chamber a8 formed in the body of a cylindrical extension or sleeve lt), said sleeve being attached to the body or housing 7 by means of an externally screw threaded flange 50 formed on the lower end thereof, which is received by an internally screw threaded boss 51 formed on the upper wall of said housing at one end thereof. The upper end of the sleeve i9 is closed by means of a screw threaded cap or plug 52 which is screwed tightly into the threaded end of said sleeve, said cap being provided with a chamber 53 formed therein which communicates with the chamber 48 in said sleeve and is also provided with a screw threaded aperture 5% through the upper wall thereof for the reception of the end of the water pipe line (i of the pump, through which water under pressure of the pump is admitted to the chamber 53 whereby the pressure of the pump is exerted upon the piston rod-44. Lying withinthe chamber 48 surrounding said piston rod and interposed at its ends between the bottom wall of the chamber L8 and the head a? of said piston rod, is a compression coil spring which serves the purpose of counterbalancing the weight of said piston rod and the group of actuating levers connected thereto, the tension of the spring being such as to withstand the maximum pressure desired in the boiler. The lower end of the piston rod, at its point of passage through the bottom wall of the sleeve 49, is provided with an ordinary stufling box 56 to form a water tight joint between the engaging parts. (See Fig.3.)

Formed on the body of the housing 7. and communicating respectively with the steam chambers 9 and 9 therein, are internally screw threaded bosses 57 and 58 into which the threaded ends of the steam pipe line 3, leading from the boiler to the pump, are connected to form a steam circuit through the valve of the governor.

The parts being thus constructed and arranged, the operation of the device will be as follows: The steam being admitted to the chamber 9 and around the valve case, the valve is then adjusted or rotated to admit the desired volume of steam from the chamber 9 through the ports of the valve case causing said lever to swing upon its pivotal connection with the link 42, and by its pivotal connection with the crank-arm 29, throiwh the link 82 said crank-arm will be causec to swing with the movement of the lever 34, thus rotating said valve and causing its ports to close or open with the ports of the valve case. When the adjustment of the valve is effected to admit a volume of steam to the pump to drive said pump at the required speed to deliver to the boiler water at a given pressure, said valve is then left in its fixed or set position. The water pressure generated by the pump, being delivered through the pipe 6 to the chamber 53 surrounding the piston rod 44, will exert a downward pressure upon said piston rod equal to the pump pressure and impart an endwise motion to said piston rod in proportion to the force of said pressure and the resistance of the spring upon said piston rod, whereby, through the movement of said piston rod and its connecting link 42 with the lever 34, a swinging movement will be imparted to said lever upon its fulcrumed end with the nut 36; and through the link 32 connected therewith and with the crank 29 of the steam valve, a rotary motion will be imparted to said valve to vary the registering openings of its ports with the ports of the valve case, thusincreasing or decreasing the volume of steam delivered to the pump in proportion to the pump pressure developed, to regulate the speed of the pump and compensate for fluctuations in the steam pressure of the boiler, which would otherwise result in the acceleration of the pump with each increase or rise in the steam pressure, and a resultant rapid increase in the pump pressure would follow. WVhen the valve shall have been once adjusted and set to deliver the desired volume of steam to the pump to insure the return of a given pressure of water, it will be seen that the action of the device will be entirely automatic in its control of the speed of the pump, and also automatic in its action in starting and stopping the pump through the opening and closing of a valve 59 located in the feed water line between the pump and boiler. The action resulting from the closing of the valve in cutting off the flow of water from the pump to the boiler would be to throw the entire pump pressure upon the piston rod, imparting an endwise movement thereto of such force as to drive said piston downward until the actuating levers connected therewith and with the valve stem will have rotated said valve to the point of entirely closing the registering valve ports, thus shutting off the steam from the pump, in which position the valve would remain closed under the pump pressure and the steam shut off from the pump, when, by

opening the feed water valve to the boiler, pressure on the piston being relieved, the spring will raise said piston and through the actuating levers connected thereto will open the valve and admit steam to again start the pump. I

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A pump governor comprising a retaining case, a steam chamber in said case havin an induct and an educt port communicating therewith, a valve case within said chamber having ports communicating with said induct port, a valve journaled to rotate in said valve case and having ports adapted to communicate with the ports of said valve case and with said educt port, a pump pressure chamber adapted for connection with a pump, a spring tensioned piston contained within said chamber adapted to be actuated by said pump pressure, and means adj ustably fulcrumed in said case and pivotally connecting said piston with said valve for imparting rotary motion thereto.

2. In a pump governor the combination of a retaining case, a direct pressure steam chamber in said case having an induct and an educt port communicating therewith, a valve case within said chamber having ports communicating with said induct port, a valve journaled to rotate in said valve case and having ports adapted to communicate with the ports of said valve case and with said educt port, a pump pressure chamber adapted for connection with a pump, a spring tensioned piston contained within said chamber and adapted to be actuated by said pump pressure, a lever having a linked connection with said piston and with said rotatable valve, one end of said lever being pivoted to an adjustable fulcrum within said case, whereby said lever may be adjusted to set the ports of said valve with respect to the ports of said valve case.

3. In a pump governor, the combination of a retaining case, a direct steam pressure chamber in said case having an induct and an educt port communicating therewith, a

cylindrical valve case within said chamber having ports communicating with said induct port, a valve having ports adapted to communicate with the ports of said valve case and with said educt port seated to rotate in said valve case upon a valve stem journaled in said retaining case, a crankarm-attached to the end of said valve stem, a pump pressure chamber adapted for connection with a pump, a piston contained within said chamber and adapted to be actuated by said pump pressure, a compression coiled spring interposed between the end of said piston and the end wall of said chamber for retarding said piston against end movement by said pressure, a screw threaded stem of said piston Will impart a rotary moveseated to rotate in said case, a screw threaded ment to said valve. 10 nut inovably carried on said stem, a lever In testimony whereoLI sign this specificafulcrurned at one end to said nut, a link tion inthe presence of two Witnesses. pivotally connecting said lever with said KARL A. KENDRICK. crank-arm, and a link pivotally connected to l/Vitnesses:

the free end of said lever and to the end of B. F. WHEELER,

said piston, whereby a reciprocal movement M. E BROEsAMLE.

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

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