US1004822A

US1004822A - Turbine-driven centrifugal pump.

Info

Publication number: US1004822A
Application number: US60831711A
Authority: US
Inventors: Walter Scheurmann
Original assignee: HENRY R WORTHINGTON
Current assignee: HENRY R WORTHINGTON
Priority date: 1911-02-13
Filing date: 1911-02-13
Publication date: 1911-10-03
Anticipated expiration: 1928-10-03

Description

W. SCHEURMANN. lTURBINE DRIVEN GENTRIFUGAL PUMP. y APPLIOATION FILED PEB. 13, 1911. 1,@04,822 Patented 001.3, 1911.

@hemd www4/MM 5?/ burrnn efrafrns rar-nur WALTER SCHEURMAN N, V01S NEWARK-UPON-TREN T, ENGLAND, ASSIGNOR T0 HENRY R.

WORTHINGTON, A CORPORATION 0F NEW JERSEY. y

TERMINE-naiven CENTRIFUGAL PUMP. i

To all whom 'it may concern.'

Be it known that I, WALTER SGHEUR- MANN, a citizen of the Republic of Switzeu land residing at Newark-uponTrent, 'Eng land, have invented certain new and useful Improvements in Turbine-Driven Centrifugal Pumps, fully described and represented in the following specification and the accompanying drawing, forming a part of the same.

This invention relates to an improved Y combinat-ion of steam turbine and direct driven centrifuga-l pump, by which the construction is simplifed,the weight and overall lengths reduced, unnecessary parts eliminat-ed and eiiciency improved.

The general practice in building steam turbines and (centrifugal pumpsv direct driven thereby has been to build the turbines and pumps substantially as independ-v ent units, with separate casings, theusual stuffing boxes, labyrinth packings and intermediate bearings between the turbine and pump. In accordance with the present invention, the sha-ft extends direct-ly from the turbine into the pump through a sleeve formed or carried the turbine and pump covers, so that the shaft is inclosed throughvout the turbine and pump, and the space between the shaft and .sleeve is sealed to prevent leakage-between the turbine and pump and the iecessary lubrication provided, by introducing water or other lubri cant under suitable pressure. The turbine and pump are thus brought close together and the usual stuffing boxes and packings for preventing leakage from the turbine and pump casings are not required. The turbine and pump covers are preferably combined in one casting for economy of `weight and space, although this is not essential.

In some constructions in which the pressure of the liquid in the pump or that 0f the sealing liquid introduced between the turbine and pump may exceed that of the adjoining turbine space, there may be danger of the liquid leaking in too large quantities along the clearance left about the rotating shaft, so as to accumulate in the turbine and interfere with its satisfactory working. To avoid this leakage in such cases, I preferably form an ejector around the shaft between the turbine and pump, by which Specification of Letters Patent.

Application led February 13, 1911.

Patented Uet. 3, 1.911. Serial No.1608,317.

In the drawing Figure l is a central vertical section of a horizontal combined turbine and centrifugal pump. Fig. 2 is @a detail section of a portion of the ejector illustrating the ejector action.

. Referring to said drawings, A is the turbine rotor and the pump impellers, the pump being shown as a three-stage centrifugal pump of a well known type, the turbine and pump impellers having the common lshaft C by which the impellers are direct driven by,the turbine. The pump suction D (shown in dotted lines) is next the turbine and E is the delivery chamber surrounding the last impeller. The turbine casing Fand pump casing G are closed at their adjacent ends by the common head or cover H through a. cent-ral opening in which the shaft C extends from the turbine to the pump, so that the shaft is inclosed between the turbine and pump by t-he head or cover. This head or cover H between the turbine and pump is of such a thickness as to provide for introduction of sealing liquid into the clearance space between the shaft and head, so as to avoid leakage in either direction between the turbine and pump, this sealing liquid being taken from theA pump or any other source suitable to secure the desired pressure.

In the preferred constructionshown, an ejector is formed about the shaft by which liquid in the clearance space is conducted away so as to prevent the passage to the turbine of either the sealing liquid or liquid from the adjacent pump space. In this construction the sleeve bet-Ween the turbine and pump, in which theshaft runs, is divided into two sleeves, 1, 2, and these sleeves are arranged at their adjacent ends to form the ejector, by which the velocity of the liquid passing through the ejector throat into the diffusing portion of the ejector is changed into pressure and the liquid delivered through the outlet passage so as to prevent its leakage into the turbine. The liquid enters from inlet 4 into the small circular chamber 5 about the sleeve 2 and through openings 6 into the clearance space between sleeve 2 and the shaft and then through the ejector formed between the adjacent ends of sleeves 1, 2 into circular chamber 7 and to outlet 8, from which it is led either to the atmosphere or to the vacuum space in4 the condenser and air pump as desired and according to the pressures used. The action of the ejector will be clear from the detail Fig. 2.

l/Vhile the invention has been illust-rated and described in connection with a steam turbine and centrifugal pump for liquids, the invention is applicable also to gas turbines and to other rotary pumps for liquids and to rotary air or gas pumps or compressors, and the feature of the ejector on the clearance space may be used in other classes of constructions in which such shaft sealing or lubrication lis required and such uses are `within the invention.

It will be understood that the invention is not to be limited to the detail form or particular arrangement of parts in the construction illustrated, but that many modifications rnay be made within the invention as defined by the claims.

What I claim is 1. A combined turbine and direct driven centrifugal pump or the like, having its shaft inclosed between the t-urbine and pump and having a liquid seal to prevent leakage between the turbine and pump formed by circulating liquid through the 2. A combined turbine and direct driven centrifugal pump or the like, having its shaft inclosed between the turbine and pump and having a liquid seal to prevent leakage between the turbine and pump formed-by circulating liquid through the clearance space about the shaft independently of the turbine chamber, and an ejector about-the shaft through which the liquid passes from the clearance space.

3. A combined centrifugal pump or the like, having its shaft inclosed between the turbine and pump and having a liquid seal to prevent leakage between the turbine and pump formed by circulating liquid through the clearance space about the shaft independently of the turbine chamber, and a sleeve surrounding the shaft between the turbine and pump and arranged to form an ejector through whichy the liquid passes from the clearance space.

4. The combination with a shaft and pasf sages for circulating liquid through the clearance space about the shaft, of an ejector inclosing the shaft for conducting the liquid from the clearance space. l

5. The combination with a shaft, of sleeves 1, 2, about the shaft arranged toV form at their adjacent ends an ejector for conducting liquid from the clearance space about the shaft.

In testimony whereof, I have hereuntosetmy hand, in the presence of two subscriblng witnesses.

WALTER SCHEURMANN.

Witnesses:

GEO. F. SANDIFORD, A. WoLs'rENHoLME.

turbine and direct driven l