US1197755A

US1197755A - Apparatus for pumping liquids.

Info

Publication number: US1197755A
Application number: US67967512A
Authority: US
Inventors: Gustav Moeller
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-02-24
Filing date: 1912-02-24
Publication date: 1916-09-12
Anticipated expiration: 1933-09-12

Description

e. IvILLEII.

APPARATUS FOR PUMPING LIQUIDS. APPLICATION FILED rss. 24, 19,12.

1,19737-'5L-3.v PaIenIeIIsepI. 12,1916.

4 SHEETS-SHEET l- Figi e. MLLER. APPARATUS FOR PUMPING LIQUIDS.

APPLICATION FILED FEB. 24| 1912.

dus

.L w m MQ ma V Su WAV/ mw.. l@ Lnbvd. IZ mY .J

M A 2 W, 1 7

G. MLLER.

APPARATUS FOR PUMPING LIQUIDS.

APPLICATION FILED EEB. 24. 1912.

PatelntedSept. 12,1916.

4 SHEETS-SHEET 3.

G. MLLER.

'APPARATUS FOR PUMFING LIQUIDS` APPLICATION FILD FEB. 24| 1912.

1,197,755. y Patentedsept.12,1916.

GUSTAV MLLER, F BERLIN-CLOIITENBURG, GERMANY.

APPARATUS FOR PUMPING LIQUIDS.

To all whom t may concern:

Be it known that' I, GUsTAV MLLER, a subject of the King of Prussia, residing at Berlin-Charlottenburg, in the Kingdom of Prussia and German Empire, have invented new anduseful Improvements in Apparatusfor Pumping Liquids, of which the follow` turbine, or electromotor, the external diameter of the pump must `of course be very small. For larger quantities of liquid the `drawback would then arise that the diameter of the inlet, or suction, opening would have to be very large, and would eventually much exceedthe external diameter, because,

for theoreticalY and practical reasons, the inlet speed cannot much exceed ten feet perv second, so that a practically useful pump cannot be constructed. vAttempts have been made to overcome lthis drawback by dividing the pump into several parallel working disks onv one and the same shaft, but there is also a limit to such a divisin, owing to the great complication of the pump casing, and the .the high speed rotating driving engine or unfavorable conditions for guldmg water, as well as the diiculty of properly supporting the long shaft.

My present invention consists, -in coupling motor with a centrifugal pump adapted to force a comparatively `small quantity of liquid to avery great height, and in conducting the liquid from said pump to a turbine in which thel energy contained therein is utilized to such an extent that the water issuing from said turbine still has sucient energy to rise up to the height to which it has to be forced. Said turbine is coupled with the mainl centrifugal pump, and is so constructed that its speed of rotation conforms with the normal speeds of rotation of centrifugal pumps, that is said pump rotates at the speed at which a large uantity 0f liquid can be forced with good e ciency.

the

Specication of Letters Patent. Patentedsept, 12 lg, Application led February 24, 1912. Serial No. 679,675.

enlarge the external diameter of the cenby reducing the num.A

In'the accompanying drawing illustrating Ithe invention by Way of examplet Figure 1 1s a diagrammatic representation of the manner of connecting the various apparatus. Fig. 2 is a section through a centrifugal -pump, in which a one-sided centrifugal pump disk, that lis the socalled low pressure pump, is combined in one casing with the turblne by which it is driven and with the driving or so called high pressure pump, whichsupplies water under pressure to said turbine. Fig. 3 is a section on the line A4-B inI Fig. 2, Fig. 4 is a section through a one-sided combined pump, in which a'feed pump coupled directly with the slowly rotating pump is adapted to deliver the liquid to the high pressure pump with a certain 1n1tial speed. Fig. 5 showsa section through a double-sided combined pump, in which a feed pump is provided to deliver liquid. toy

both sides of the high pressure pump.

1 is the driving engine (a high speed -steam turbine, gas turbine, electromotor, or the like), to the shaft 2 of which is directly coupled the high pressurepump 3, which sucks a comparatively small quantity of liquid out of the pipe 4 through a branch pipe V5, and Vforces the same at a high pressure through the pipe 6 to the turbine 7 .which is of the reactionary type. After leaving the turbine 7 the water flows through the branch pipe Sto the. pressure main 10` and still has sucient energy to attain the same height as the liquid forced by the low pressure pump 9. rIhe low pressure pump is coupled with the turbine 7 by which it is driven. Said low pressure pump sucks the water put of the suction pipe 4 and forces it rinto the pressure pipe 10, inv which the liquid from the turbine 7 also flows. The turbine isl coupled with the low pressure pump 9 by the shaft l1. i

In the construction shown in Figs. 2 and Y 3 the low pressure pump 9 is combined with the turbine 7 and arranged in one and the same casing 12. In said casing the high pressure pump 3 is also provided and the arrangement is of such a character thatv the driving shaft 2 vof the high pressure pump is in a line -with the shaft 11 of the low pressure pump. The turbine 7 and the low pressure pump 9 are surrounded by the well known diffuser 13, through which the liquid is forced into the pressure pipe In the construction shown in Fig. 4 the arrangement is such that a special @feed pump 14 is provided for the high pressure pump 3, which feed pump together with the low pressure pump 9 sucks liquid out of the suction pipe 4: and feeds the same to the i high speed high pressure wheel 3.

the liquid is reduced, (b) for the 10W pressure pump: likewise increase of the external diameter by lesseni-ng the number of revolutions, and, in addition, an improvement of the efficiency, so that for the entire combination the drawbacks of high speed pumps of this kind are effectively overcome.

In practice the concentric arrangement of the pumps inside one casing, thus without a high pressure main, will probably be chosen. The advantage is that the energy imparted to the liquid in the high vpressure disk is utilized in the turbine wheel without any previous transformation of velocity into pressure by which considerable loss would be entailed. Moreover, the casing is then quite as simple as in the ordinary double-V sided centrifugal pumps.

The turbine 7 in the described arrangement is always referred to as a reactionary turbine, which means, that the cross-section of the fluid channels or passages is larger at the inlet of the turbine than at the outlet, se` that as the pressure of thefluid lduring its passage through the turbine is decreased the velocity must increase, In this manner it is positively avoided, that any translation of velocity into pressure shall take place in any part of the turbine, which always reduces the operating rate as a result of the accompanyin whirling and irregularities in the Huid. T e pressure, which is necessary to meet the requirements at the outlet of the whole apparatus should only be generated through the centrifugal force in the high speed pump, in contrast to the known so called rotary diifusers in which the opposite takes place. In this manner it is provided that the turbine 7 produces, as a reactionary turbine, a better loperating rate than those apparatuses which are already art as reactionary turbines.

The turbine wheelvmay be provided in well known manner with several series of known in tne blades, in order to obtain a higher number' of revolutions, andsaid turbine wheel-may be constructed on a'ny desired system. Further, two or more of the apparatus described can be arranged parallel to each other, or a high pressure pump may be-caused to act on several turbine wheels, or several high pressure pumps may be caused to act on a single turbine wheel. The low pressure pump can also be divided into a number of parallel working pumps. Further, several entire plants may be combined in series in order to high pressure pump element drawing ,its

Huid supply from said main fluid body.

2. The described apparatus for pumping liquids, comprising in combination, a casing, a low pressure centrifugal pump element mounted in said casing and adapted to lifta comparatively heavy Huid body, a turbine carried by said low pressure centrifugal pump element and adapted to drive the latter, and a high pressure pump element also mounted in said casingl and adapted to deliver a comparatively small quantity of water under sufficient pressure to drive said 3. The described apparatus for pumping liquids, comprising in combination, a casing, a high pressure pump disk, rotatable in said casing, a turbine wheel surrounding said high pressure rpump disk and adapted to receive fluidV under high pressure from said high pressure pump disk, a-nd a second pump disk carried. by said turbine wheel and adapted to be driven by the latter at a speed to deliver a comparatively large quantity of `fluid under a lower pressure.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

` GUSIAV MLLER.

Witnesses:

, HENRY HAsPER, WOLDEMAR HAUPT.