US1063611A - Centrifugal pump. - Google Patents

Description

A. SIEGEL & I. GOLDSTEIN.

GENTRIFUGAL PUMP.

APPLICATION FILED JUNE 24, 1910.

Patented June 3, 1913.

Inv'encofs, August Sis-g el, F'r-anz.Gol s teir 1. y

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nnirnn sTA'rEs PATENT orn cn.

AUGUST SIEGEIJ, 0F CHARLOTTENBURG, AND'FRANS GQLIDSTEIN, 0F BERLIN, GER-- MANY, ASSIGNORS TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

Specification of Letters Patent.

GENTRIFUGAL PUMP.

Patented June 3,1913.

I Application filed June 24, i910. Seria1'No.568,6 5 3.

To all idiom 7'2 may concern." lie it known that we, AUGUs'r SiEGEL an Fin-ins Go'LDsTnm, subjects of the Emperor of Germany, residing, respectively,.at Charlottenburg and Berlin, Germany, have invented certain new and useful Improvements in Centrifugal Pumps,-of which the following-is a specificatio-n. v x

The invention relates to centrifugal pumps used for exhausting air, gases, vapors, .e'tc.,'

from largechambers, suchfor example,.as.

condensers, and more'especially to means'fon starting such pumps in an improved and ei'licicnt manner. v

In the accompanying drawing illustrating one mode of applying.the-invention, Figure 1 is an elevation showing the general argrangement of the apparatus, some of the parts being in section; and. Figs. '2' and- 3. showmodifications ofcertainparts of the apparatus. a i

In installations where throwing an pumps are used to exhaust condensers or other large chambers, a considerable quantity of a special throwing medium notnecessary for'o'rdinary operation has to be supplied to the pump when starting up before'a degree of vacuum is created suilicient to automatically draw'the regular throwing medium into the pump. This special or supplementary medium is usually water under pressure. The

present invention reduces to a minimum the consumption of the supplementary or" auxiliary starting medium thereby effecting a material saving-fin the operation of the ap.'

paratus; The starting medium is not only in many cases difiicult to obtain; but it is also difficult to remove and is considerable expense.

. In our invention atleast one cut-ofi' memher is arranged between the centrifugal. air pump and the region tobeexhausted so that the pipe or pipes connecting the two can be shut off i in such a manner that when the' pump is being started, the gases to be drawn oficannot pass to itssuction chamber or can do so only gradually.

In e der to obtain the degree of vacuum requisite to automatically supply the pump with throwing water with the arrangementjust described, it is only necessary after the pump has been brought to the desired speed of rotation to furnish a small quantity of ,waterfrom the. auiziliary source of supply.

(hecause of sucked from the condenser through the-connec'ting' pipe or. pipes by the action of the throwing" water,.sa1d pipe being opened to j a limited extent until the suction has pro.- duced such a degree of vacuum in the condenser, that the pipe can be opened to the degree desiredfor regular operation witht-hethrowing water by the pump.

To reduce the quantity of starting water' to a minimum and to utilize as small a degree of vacuum as possible for drawing in which is-at rest-in the throwing water condint and has to be set in. motion by said vacuum, is made as short as possible. Tosccure these Important .results, the starting water'under pressure is introduced into the out endangering the automatic suction of v rmv the throwing water, the column of fluid throwing water supply pipe as near the beginning; of said. pipe as-possible; so that the starting water before entering, the pump will force thev column of fluid infsaid pipe the throwing Water suction pipe inthis maner, no more wateras usedjthan' if it were introduced directly. into. the pump, since the water already in the suction-pipe which is '.forced forward is used asthrowing' or start-- 'ing water and assists in producmg; the .de-

sired vacuum.

Referring. to the drawing, the throwing air pump 4 is driven by any suitable inotor and is connected by the pipe, or

conduit 5 to the condenser 6 fromw-h ch it removesgases andvapors. The flow through the pipe 5 is controlled by a valve 7 provided, with a'smallopening or by-pass 8 in the valve disk which, when the valve is closed, permits only a small quantity of .gas or vapor to be drawn from the condenser. I The throwing water is taken from the tank-or well 9, having an overflow 10 to preventf flooding. The throwing water passes from the Well through the pipe 11 to a cooler 12 of any approved construction and from the. cooler through. the pipe 13 to the inlet of the, pump 4. The discharge ahead oi! it, thereby' bringing the contents of the pipe into movement in a: direction favorable for subsequent suction by the pump. By supplyingthe starting water to centrifugal from the pump passes throu'ghthe ipe 14 to the well, the water replenishing ti ply in the well and the air passing off.

The starting water is supplied from any 5 suitable source by a pipe 15 which joins the given point through which alr, etc, mustpipe 11 as close to the well sis/possible. A three-Way valve 16 controls the flow from either the pipe 11 or the pipe 15 to the cooler 12, pipe 13 and the pump 4.

Instead of providing the valve 7 with an opening 8, the valve can besomewhat loosely fitted or it can be provided with some kind of-a stop or indicating device which will permit a known small opening thereof adapted to the conditions. Or these devices and theopening '8 can be omitted and a byass 17, Fig. 2, arranged around the valve with a valve 18 in said by-pass to regulate the size of the passage or opening at a pass from the condenser to the pump when the valve 7 is closed. This small opening in the by-pass can also be obtained by 1nserting a perforated plate 19, Fig. 3, between the flange 20 on the pipe 5and the flange 21 on the by-pass pipe 17.

WVith the last arrangement, it is only necessary when connecting the pump to another condenser or when adopting other condi- I tions of operations to replace the plate or disk 19 by another having a suitably difi'erent perforation in order to obtain the best operating conditions for these particular cases. 7

The method of operating the apparatus when starting the pump is as follows :The valve 7 is closed eitherlbefore starting the pump or during starting or after the pump 7 has been brought to the desired speed of rotation. The three-way valve 16 is then so adjusted that it shuts ofi' the pipe 11 and supplies starting water from the pipe 15 to l the pump through the pipe 13. The starting water flows intothe pump impeller and speedily creates a vacuum sufiicient to draw throwing water from the well 9 through the parts 11, 12 and 13. When said vacuum is established, the valve 16 isvshifted to shut off the pipe 15 and connect the pipe 11 to the pump. The efiicient suction of the throwing water from the well 9 by the least possible vacuum in the pump is facilitated by making the junction of the pipe 15 with the pipe 11 as close to the well 9 as possible, so t at the water and air in the cooler 12 v and the pipe 13 are set in motion in a direc- "f tionfavorable to the suction of the water from the well 9. Hence only a small quart, tity of fluid has to be accelerated by the vacuum. This vacuum is formed in a very short time, since by reason of the small ie sup tlirowingIwatefi-fthe, valve 7 1 being closed, .until such a vacuum is formed in the condenser thatsaid valve canbe opened without. causing the vacuum in the pump to fall so much that the throwing water cannot be 'drawn into the pump by it. It is, moreover, immaterial to the operation by this method whether the small opening for permitting a restricted flow is introduced between the condenser and the pump before or during the starting of the pump, Thus, for example, a shut-ofi' member or valve,,such as 18, may be placed in the by-pass 17, which valve is not opened until after such a vacuum is established in the pump that a small quantity of air, vapor, etc, may be sucked through said opening without impairing the vacuum in the pump to any objectionable extent.

In accordance with the provisions of the patent statutes, we have described the principle of operation of our invention, together with the apparatus which We now consider to represent the best embodiment thereof; but we desire to have it understood that the apparatus shown is only illustrative, and

that the invention can be carried out by other means.

What'we claim as new and desire to secure by Letters Patent of the United States, 1s

ljIn combination, a condenser chamber,

a throwing pump for exhausting the chant,

ber, awell, a conduit through which throwing water is drawn from the well into the pump by suction, a starting water conduit connected to the first conduit at a point adjacent to the .well for supplying Water under pressure to set the contents of the first conduit in motion toward the pump, valve means for controlling the flow through the two conduits, a conduit leading from the pump discharge to the well, a conduit connecting the pump with the chamber, and valve means in the last mentioned conduit including a device having an area less than the full opening of said conduit for per mitting a flow from the portion of the conduitat one side of said means to the portion at "the opposite side thereof when said means is closed.

a throwing pump for exhausting the chamber, means for supplying starting and regu-.

lar throwing water to the pump, a connection between the pump and the chamber, a valve in said connection, and a by-pass around said valve having an area less than the full valve opening for permitting a flow from one side of the valve to the other when said valve is closed.

3. In combination,. a chamber, a throwing pumplfor exhausting the chamber, a conduit tor supplying throwing water from a suitable source to the pump, a conduit oonnected to the throwing water conduit ad jacent its inlet end for supplying starting water to the pump under pressure, means controlling the flow through said conduits, a connection between the pump and the chamber, and means for varying the effective area of said connection.

4. In combination, a condenser chamber, a throwing pump for exhausting the chamher, a conduit supplying throwing water from a suitable source to the pump, a con-' duit connected to the throwing water con-" area less than the full valve opening for permitting a flow from one side of said valve means to ,the other.

5. In combination, a chamber", a throwing chamber, and valve means in said connection including a devlce having an pump for exhausting the chamber, a Well, a conduit supplying throwing water from the Well to the pump, a cooler arranged in said conduit, a starting water conduit connected to the first conduit between the well and the cooler, a three-way valve at't-he junction of said conduits for controlling the fiow therethrough, a conduit leading from the pump discharge to the well, a conduit connecting the pum {to the chamber, and a valve in said coil uit provided with by-pass means having a flow area less than the full valve opening for permitting a flow from one side ofthe valve to. the other,

In'witness whereof, we have hereunto set our hands this 8th'day of June, 1910.

AUGUST SIEGEL. FRANS GOLDSTEIN.

Witnesses HENRY HASPER, .VVOLDEMAR HAUPT.

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

' Washington, D. C.

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