US1719138A

US1719138A - Regulating apparatus for steam condensers

Info

Publication number: US1719138A
Application number: US34501A
Authority: US
Inventors: Roucka Erich
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-06-18
Filing date: 1925-06-02
Publication date: 1929-07-02
Anticipated expiration: 1946-07-02

Description

y 2, 1929- E. RouKA 1.719.138

REGULATING APPARATUS FOR STEAM CONDENSEI IS Filed June 2, 1925 INVENTOR V ER/EH RUUCKA ATTORNEYS.

Patented July 1929.

UNITED STATES ERICH ROUKA, F IBLANSKO, GZECHOSLOVAKIA.

BEG-ULA'IING APPARATUS FOR STEAM UONDENSERS.

Application filed June 2, 1925, Serial No. 34,501, and in Czechoslovakia .Tune 18, 1924.

This invention relates particularly to the regulation of the flow of the cooling water through surface condensers utilized on the exhaust of steam engines especially steam a turbines. It is known to those skilled in the art that a certain quantity of cooling or condensing water at a given temperature is necessary to condense one pound of steam, and that for eflicient operation the flow of coolo ing water must be varied in accordance with variations in the load and from time to time in accordance with other changing conditions, such as variations in temperature of the cooling water, accumulations of foreign I matter on the condensing surfaces, etc.

One object of my invention is to provide novel and improved apparatus for egulating the flow of condensing water throigh condensers of the character described, whereby a said flow shall always have an efficient relation to variable conditions such as steam flow or load, temperature of the cooling water, etc.

Another object is to provide apparatus of the character described whereby the flow of water through the condenser is regulated by means influenced differentially by both the steam flow or load and the flow of cooling water.

o Other objects areto provide such apparatus whereby the flow of cooling water is also varied in accordance with variations in conditions within the condenser, for instance the vacuum; to provide in such apparatus means .3 for producing a certain relation between the steam flow and the flow of cooling water, and means for varying said certain relation in accordance with another condition, and to obtain other results and advantages as may a be brought out by the following description.

In the accompanying drawings I have shown two systems for regulating the flow of condensing water through condensers of steam turbines, and while I have shown'these a two systems embodying certain details of construction and arrangement of the parts, it will be understood that this is mainly for the purpose of illustrating the principles of the invention and that many modifications m and changes may be made in the detail construction and arrangements of the apparatus without departing from the spirit or scope of the invention. Referring to said drawings in which corresponding and like parts are designated throughout the several views by, the same referencecharacters,

The figure is a schematic partial sectional and partial side elevational view of one sys tem embodying the invention.

Specifically describing the embodiment of the invention shown in the figure of the drawings, the reference character 2 designatesa steam turbine the exhaust steam from which is condensed by a condenser 16 of the known surface type in which cooling water is flowed through tubes over which the exhaust steam passes from the turbine. The turbine is provided with the usual regulator 6, governor u 10 and pilot motor 8 which parts are connected together in known manner by the lever 12 so that the flow of steam into the turbine is automatically regulated. The steam supply for the turbine flows through a pipe 4 in which is disposed an orifice flow throttling device 32.

The condensing water for the condenser 16 is pumped into the condenser by a centrifugal pump 22 driven by another steam turbine, the water entering the condenser through pipe 18 and flowing from the condenser through pipe 20. The turbine for the pump is provided with the usual regu lator 28, governor 26 and pilot motor 24 connected together by a lever 30 by means of which the steam supply to the turbine is automatically regulated. 1

In accordance with the invention, the flow I of condensing water into the condenser is controlled in accordance with the difl'erential relation between the steam flow to the turbine 2 and the flow of the condensing water through the. pipes 18 into the condenser. Ac-

cordingly, a device 36 sensitive to differences in pressure at opposite sides of the orifice 32 in the steam supply pipe 4 is provided to cooperate with a device 42 sensitive to variations in the flow of condensing water through the pipe 18. The device 36 is of known form and includes a diaphragm 38 arranged in a casing which is connected at opposite sldes of the diaphragm by pipes 48 I which 1 a tension spring 58 to nected to a lever 52 to opposite sides of the orifice device 32.

e device 42 is similar to the device 36 and includes adiaphragm 44 arranged within a casing connected at opposite sides of the diaphragm by pipes 50 to a Pitot tube 34 arranged within the pi e 18. The diaphragms 38 and 44 have conne hted thereto the respective rods and 46 which are pivotally con- 'at opposite sides ofthe fulcrum 54 thereof.

To one end of the lever 52 is connected thevalvepiston 64 of a governor valve 62 controls the flow of fluid through pipes 66to and from a fluidmotor- 68 including a piston 70 which is connected .through a tension spring 72 to one end of the lever 30. e other end of the lever 52 is connected by a fixed support through an adjusting nut 60. p Q When a certain flow of steam obtains in the (pipe 4,-a certain difference in pressure is pro uced upon opposite sides of the diaphragm 38, and similarly when a certain flow of cooling water obtains in the pipe 18, a certain difference in pressure occurs at opposite sides of'the diaphragm 44. When these differences in pressure bear a certain relation to each other, the valve piston 64 is main b: tained in its neutral position whereby-flow 3 'ing apis't0n 70 is of fluid to and from the fluid motor 68 havprevented. Accordingly, a 'lllllfOI'IIl supply of steam to the turbine driving the pump 22 and a uniform flow of condensing water through the pipe 18, are produced. For obtaining a certaln definite relation between the flow of steam through pipe 4 and flow of water through pipe 18, the tension of the spring 58 and/or the position of the fulcrum roller 54 may be varied.

When the steam flow through pipe 4 varies; for example increases, the said definite relation between the

devices

36 and 42 is dis.- turbed by a variation in the pressure difi'ercific instance to decrease sai other about its fulcrum ence on the diaphragm 38, whereupon the ever- 52 is moved in onedirection or the 54, in the specific example described in the direction of the arrow, so that the valve piston 64 is moved to permit the flow of fluid to one side of the piston 70 and from the other side thereof which causes movement of said piston to vary the, tension of the sprin 72, in this spedtension. This action in turn actuatesthe governor 26, whereupon the pilot motor 24 is operated and changes the flow of steam through the turbine,driving the pump 22 whereby the flow of water through the pi e 18 is varied, in 1s action continues such as to again this instanceincreased. T until the flow of water is establish the certain definite relation be tween the until the sure difference to influence the lever in the direction opposite .tothat indicated by the devices 36 and' 42, in this instance -er mounted on a flat device 42 'isactuated by the pres-.

arrow and the valve piston 64 is returned to neutral position.

The flowof water into the condenser is further controlled in accordance with variations in the vacuum within the condenser. For this purpose, the fulcrum 54 of the lever 52 is preferably in the form of a rollfixed support 56 and movable longitudinally of the lever by means of a bell crank lever 74 connected to the piston 76 of a fluid motor 78, the flow of oil to and from which is controlled by a valve piston 82 arranged in a cylinder 80 and connected to a lever 86 pivotally connected at one end to a casing 90 and intermediate its ends toa diaphragm 88 closing one side of said casing. The casing 90 is connected by a pipe 92 to the interior of the condenser 16, and the free end of the lever 86 has connected thereto a counter-weight 94. The diaphragm 88 is thus sensitive to differences in the pressure of the vacuum in the condenser 16 and the influence of the counter-weight 94. The counterweight is adjusted to balance a certain vacuum pressure in the condenser 16, and when this balance obtains the valve piston 82 is in its neutral position. Upon variations in said vacuum pressure the'lever 86 is moved in one direction or the other to actuate the valve piston 82 which permits flow of oil to one side of the piston 76 and from the other side thereof. The piston 76 is thereby movediin one direction orthe other to oscillate the bell crank 74 and vary the relation of the fulcrum 54 to the lever 52. This variation in the position of the fulcrum 54 disturbs the certain relation between the devices 36 and- 42, and accordingly when the ulcrum 54 is moved, the flow of cooling water through pipe 18 is varied upon changes in the vacuum pressure. within the condenser 16. It will thus be understood .that the flow of water into the condenser vacuum pressure and prevent changes in the flow of water except upon definite variations in the vacuum pressure.

Having thus described the invention, what I claim is:

1. Apparatus for controlling the flow of cooling water through condensers for steam engines, comprising means actuated in accordance with the flow of steam to an engine, means actuated in accordance with the flow of cooling water-to the condenser, a differential gearing connection between said two of cooling water to the condenser,

means to establish a predetermined relation between the operation of said two means,

means for varying the flow of cooling water through said condenser, and a governor actuated by said gearing upon variations from through said condenser, a governor actuated by said gearing upon variations from said predetermined relation for controlling the last-mentioned means, and a movable member cooperating with said differential gearcooling water @engines, comprising means actuated in acgine,

flow of cooling water to the condenser, a

ing so that variations in the position of said member causes variations in the relation between the steam flow and the flow of cooling water.

. 3. Apparatus for controlling the flow of through condensers for steam cordanee with the flow of steam to an engine, means'actuated'in accordance with the flow of cooling water to the condenser, a differential gearing connection between said two means to establish a predetermined relation between the operation of said two means, ing water through said condenser, a governor' actuated by said gearing upon variations from said predetermined relation for controlling the last-mentioned means, a movable member cooperating with said differential gearing so that variations in the position of said member causes variations in therelation between the steam flow and the flow of cooling water, and a device actuated in accordance with a condition in said condenser for automatically varying the position of said movable member.

4. Apparatus for controlling the flow of cooling water through condensers for steam engines, comprising means actuated in accordance with the flow of steam to an en means actuated in accordance with the differential gearing connection between said two means to establish a predetermined relation between the operation of said two means, means for varying the flow of cooling water through :said condenser, a governor actuated by said gearing upon variations from said predetermined relation for controlling the last-mentioned means, a

movable member cooperating with said different-ial gearing so that variations in the position of said member causes varlations in flow of steam to an engine,

a predetermined relation between the operation of said two means, means'for varying the flow of cooling water means for varying the flow of cool cordance with the flow of steam to an engine,

means actuated in accordance with the flow of cooling water to the forvarying the flow of cooling water through the condenser, a governor for the last-mentioned means, and an operative connection between the first-mentioned two means and said governor so that the lastmentioned means is automatically operated to maintain a certain relationbe'tween the condenser, means flow of steam and the flow of cooling water.

6. Apparatus for controlling the flow of cooling water through condensers for steam engines, comprising means actuated in accordance withthe flow of steam to an engine, means actuated in accordance with the flow of cooling water to the condenser, means for varying the flow of cooling water through the condenser, a governor tor the last-mentioned means, an operative connection between the first-mentioned two means and said governor so that the last-mentioned means is automatically operated to maintain a certain relation between the flow of steam and the flow of cooling water, and means actuated in accordance with a condition in the condenser for changing said operative connection to vary the relation between the steam flow and the flow of cooling water.

7. Apparatus for controlling the flow of cooling water through condensers for steam engines, comprising means actuated in accordance with the flow of steam to an engine, means actuated in accordance with the flow of cooling water to the condenser, a differential lever system connecting said two meansso that when a predetermined magnitude of flow of steam and a predetermined magnitude of flow of water obtain said lever system is at rest, means for varying the flow of cooling water through said condenser, and a governor actuated by said lever system upon movement thereof due to varia-' tions in the flow of Steam from said predetermined magnitude for controlling the last- 7 means so that when a predetermined magnitude of-flow of steam and a predeterminedwater obtain said lever magnitude of flow of system'is at-rest, said lever system includ- 5 ipg a variable fulcrum,

means actuated in accordance with a condition in said condenser for varying said fulcrum to influence ERIGH ROUCKA.