US1382605A - Centrifugal pump - Google Patents

Description

R. H. CARSON.

CENTRIFUGAL PUMP. APPLICATION FILED jUNE 30, 1920.

1,882,605. Patented June 21, 1921.4

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E" llllu R. H. CARSON.

CENTRIFUGAL PUMP. APPLICATION FILED JUNE 30. 1920. 1,382,605, v v PatentedJune 21, 1921.

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WITNESSES ATTORN EY and UNITED STATES PATENT OFFICE.

ROBERT-HUGH GARSONyOF-DANVILLE, ILLINOIS, YSASSIGNOR, BY DIRECT AND 'MESNE' ASSIGNMENTS, or oNn -srx'rn 'ro-onnN w. "REED, ONE-SIXTH TO MELVIN L. COU- TANT, ONE-SIXTH To 'TIroMAs 'J. HAWKINS, ON'E SiXTII T0 HARVEY o. ADAMS, AND'ON'E-SI'XTH To GEORGE-G. CARSON, 'ALL'OF DANVILLE, ILLINOIS.

.oENrrRIrUG-AI. PUMP.

Application filed June30,

useful Centrifugal Pump, of which the following is a specification.

This invention has reference to centrifugal pumps and its'object-is to provide means whereby fluid maybe propelled with great, force-but without the expenditure of undue power, to a destination.

Whilethe invention is adaptedtopumping various fluids it isparticularly adapted fol-pumping water or fluids oflike character and, for simplicity of expression it will hereinafter be considered that the fluid to be pumped is water, without, however, necessarily confining the invention to thepuniping of such particular material.

In accordance with the invention the Jump com arises a stator and arotor housed within'the stator manner to provide a water course from which water underpressure 1s discharged. The water is drawn from a suitable source of supply and passes into the rotor from which it is driven by centrifugal force into a course 'between the outer periphery of the rotor and the inner periphery of the stator, these parts being peculiarly formed and inter-related with the -water passing fromxthe rotor in trailing streams through trailing ports. 2 The construction is such that the water bodily rotates with the rotor and flows from a central intake to peripheral outlets and ultimatel The rotor is of a capacity 'to containpa considerable amount of water, and in the rotor is a single vane orpartition extending from about the axis to substantiall-ythe inner peripheral wall of the rotor, wherefore a relatively large centrifugal force is stored in the rotor and this forcebeingstored in a highly mobile fluid readily flows into. and then out of the rotor.

Provision is made for imparting to the water as it passes intotherotor a diversion distributive tendency, whereby the water is-flowing up to about the speedof rotation of the rotor by the time it reaches the peripheral portion of the rotor.

Provision is also made forbalancingthe 'Specification of-Letters-Patent Patented June 21, 1921.

1920. Serial No. 393,089.

stresses .upon the rotor so thatthe water,v

after escape fromthe rotor and before escapmg from the stator, so affects the rotor as to produce a floating pressure and thereby l greatly. reduces friction.

This application isa continuation in part of application No.fi3l8,502, for centrifugal pump, filed by me August 19,1919- The invention will be best understood from a consideration of the following de tailed description taken in connection with .the accompany ng drawings, forming part of this specification, with the understanding, however, that-the invention is not confined to any strict conformity with the showing in 'the'drawings, but may be changed and 'modifiedso long as such changes and modifications markno material departure from the 'salientjfeatures of the invention as expressed in the appended claims.

In the drawings: Figure 1 is an elevation of a pump embodying the invention, together with a motorfor driving the pump and a base common to both.

Fig. 2 is an axial section of the pump in a vertical plane.

.Fig. 3 is a section on the line 3-3 of Fig. 2. Fig. 4 is a section on the line 4-4 of 1. Y ig. 5 is an elevation of the rotor removed from the pump. 7

Fig-6 is an-elevation of that half of the rotor shown on'the right hand side of Fig. 5.

.Fig. 7 is a section on the line 7-7 of .Fig. 2.

Referring to the drawings there is shown a stator A,.an d a rotorBinclosecl by the stator and rotatable therein. The stator comprises two members 1 and 2 in most part alike but differing in some minor details; and the rotor comprises two similar members 8Iand 4 having some minor details of difference.

Pants 1 and 2 of the stator A are similar castings ,,with peripheries 5 in conical relation to the sides of the respectiveviews of the stator, and'each periphery 5 terminates in .a radialjflang'e 6 so situated as to'be brought in face to face relation for. 'a series offasteningbolts 7 by means of which the .twogpiartsjoftheistator may be brought into firm contact, suitable packing being used wherever advisable. The members of the statoror casing are furnished with legs 8.

by means of which the stator may be firmly secured to abase 9. The stator members 1 and. 2 are provided with similar bosses 10 and 11 which, in the particular structure shown, are erected on the top portion ofthe stator, and the line of division between the two bosses 10 and '11 may follow the line of division between the flanges 7.

Each boss 10 and 11 has a bore 12 opening through the top of the boss and'communiupper'ends of the two bosses 10 and 11 are V at this ,particular' point is prevented. vane 18 is designed to be rocked toward one or the other of the bores 12. This will cause eating at the other end with the interior of the respective stator member 1 or 2. The

jolned by a siamese coupling 13 secured to the bosses 10 and 11 by screws 14 or otherwise; The coupling 13 terminates in a nipple 15 to receive a discharge pipe 16 by means of which Water fromthe pump may be carried to any suitable point of disposal.

' Extending laterally through the coupling 13 is a rock shaft 17 carrying avane 18 within and traversing the course through the coupling13 between the ends of the course where communicating with the bores 12. The shaft 17 extends through one side of the coupling and is there provided with a rock arm 19 by means of which addition it may be rocked by hand or by connection with a moving part. The shaft 17 extends from a stufiing box 20 by means of which lealgitge back pressure to be exerted against one side or the other of the rotor B, thus tending to shift the rotor axially in accordance with the direction of pressure. The arm 19 is connected by alink 21 to a lever 22 supported at the other end by a pivot 23 carried by a bracket 24 fast toone of the side members,

say the member 2, of the stator on. the side of the axis of rotation remote from the vane.

At the axial portion of the member 2 of the stator there is formed a hub 25 through which there is produced a bore 26 for the passage of a shaft 27 constituting a drive shaft. The inner end of the bore 26 is counterbored as shown at 28 for the reception of a bearing sleeve 29 for the shaft 27. Connected to the shaft 27 by a coupling 30 or by other appropriate means is the shaft 31 of a prime mover 32' which. may be conveniently in. the form of an electric motor although not necessarily so.

7 34 on the lever 22, so that in the event of longitudinal movements of the shaft27 or of the lever 22 as controlled by the vane 18 each part will participate in the movements of the other.

The sleeve 28 terminates within the stator in ahead 35 provided. with a facial annular 1 relation thereto.

, On the shaft 7 27 there is secured a sleeve 33 receiving a fork rib 36 and both members of the face plates '3 and 4 constituting the rotor are provided with disks 37.

The shaft 27 is'continued through the plate 4 to the interior of the rotor and terminates in a conical head 38 with the axis of the cone coinciding with the axis of rotation of the rotor B and shaft 27.

Each face plate 3 and 4 of the rotor terminates in. a peripheral flange 39 flaring toward the central radial plane of the rotor and terminating in a thickened circumferential rib 40 by means of Which the two members 3 and 40f the rotor are secured together by screws 41, or in other appropriate manner. The flareof flanges 39 corresponds to the flare of the peripheral portions 5 of the stator so that there is formed achamber'42 width or thickness of the rib 40'is less than that of the rotor, and the width of the ports 44 is less than that of the ribbed portion 40 through which the ports pass. These out lets or ports are slanted into trailing relation'with respect to the direction of rotation.

This causes the streams of water, issuing from the ports, to assmue a trailing relation to the rotor and consequently avoids those retarding influences which might occur from a sudden change of direct on of the streams [or water.

Extending axially from the stator member 1 in alinement with the hub 25 is another hubor hollow boss 45 in which is seated a bearing sleeve 46 terminating at the inner .end in a head 47 provided with a facial annular rib 48. 1

Fast to the rotor member 3 is a short tubular shaft 49 firmly secured to the'member 3 and projecting therefrom toward the stator "member 1 and into the sleeve 46, which constitutes a bearing for the shaft 49.

Secured in the outer end of the short hollow shaft 49 and projecting for a short distance toward the inner end of the. shaft is an impeller bladeor blades 50 shaped to give a twisting impulse to water entering the hollow shaft 49 through a supply pipe 51 coming from a suitable source ofwater supply. (Not shown.)

The stator is provided with a central an nular web 52 projecting lnto the chamber 42 into close relation to the central peripheral portionof the rib or vane portion 40 of the rotor, so t at Wi h the Web 52 cent-rally 10' "cated with respect to the rotor, the water streams issuing from the ports 44 are each divided into two streams and ultimately pass to and through the respective passages or channels 12.

When the pump is in operation with the pipe 51 connected to a supply of water and the motor 32 running, the incoming water flows through the pipe 51 and is acted upon by the twisting impeller causing the flow of water, with a rotary impulse already imparted to it, into the rotor where it meets the conical head 38 and is givena direction change toward the periphery of the interior of the rotor, the impeller having already imparted to the body of water a rotating movement corresponding to that of the rotor. There is advantage in the reliminary moving impulse imparted to tile body of water within the rotor in correspondingly conserving power which would otherwise be absorbed in setting up the bodily rotary movements within the rotor at the peripheral portion of the latterwhere the leverage is less efficient than at the hub portion of the rotor. p

The single straight radial vane 43 acts as an abutment for the water within the rotor so that such water is in the form of a solid body of water with a progressive movement due to the escape of the water through the ports of the rotor and the replenishing of the water through the intake pipe 51 with the course of flow of the water within the rotor free from sharp turns with attendant friction and resistance. The single vane or abutment 43 tends to maintain the water within the rotor in solid compact form without threshing or foaming and consequent loss of compactness.

The ports 44 are symmetrically disposed about the rotor and are of such cross sectional size that their combinedeflective area is about equal to that of the inlet of the rotor. Ordinarily the combined cross sectional area of the trailing ports will be equal to or somewhat less than the area of the inlet, but under some circumstances the combined area of the ports 44 may be slightly greater than the cross sectional area of the pipe 51.

The result of engaging the streams of water in the plane of rotation by the annular web 52 so set as to just clear the middle of the rib or vane 40 on the rotor is to set up a constant tendency to centralize the rotor. If for any reason the stream on one side of the rotor should become greater than that on the other side thereof, the additional resistance offered to the outflow of the stream through the outlet port 12 on the same side of the pump will impart an axial thrust to the rotor to force it back to the equalizing, position.

Whil th equalizing Washer or annular web 52 may be omitted without serious loss automatically operated by connection with the power shaft 27, the automatic feature may be omitted and the vane or baffle plate may be set and secured in place when the pump is installed, or it may be manually changed from time to time as conditions demand. The baflie plate or vane is supplemental to the other equalizing features of the invention.

lVhat is claimed is:

l. A centrifugal pump comprising a stator and a rotor inclosed thereby, the pump having an annular fluid course between the stator and rotor and the rotor being provided with an axial inlet, a peripheral series of outlet ports and a single interior abutment vane or blade reaching from the axis of the rotor to the periphery thereof.

2. A centrifugal pump comprising a 'stator and a rotor inclosed thereby and the stator and rotor defining an annular fluid course between them, the rotor having an axial inlet and a peripheral series of trailing outlet ports and a single interior radial abutment vane or blade reaching from the axis of the rotor to the periphery thereof.

3. A centrifugal pump provided with a rotor, an axial inlet, peripheral outlets, and a single vane or blade within the rotor and extending radially to the peripheral portion thereof.

ports of less width than the interior thickness of the rotor, a tubular shaft delivering axially into the rotor, and means constructed to force fluid through the tubular shaft into the rotor and there change its course into a radially outward direction, said rotor having peripherally located outlet ports. v

6. In a centrifugal pump, a hollow rotor provided with a substantially radial interior vane or blade extending from the axis of the rotor to the peripheral portion thereof with the said rotor having an axial inlet and a ports extending through the vane or rib,-

said ports trailingtoward their outlet ends with respect to the direction of rotation of the rotor. 1

8. In a centrifugal pump, a stator, a rotor within the stator in concentric spaced relation thereto to define an annular fluid course between the stator and rotor, said rotor having inner peripheral walls approaching the central radial plane of the rotor and terminating in a thickened circumferential rib with trailing outlet portstherethrough, and the stator having an annular dividing web midway of its width and in close relation to the outlet ports whereby to divide the streams issuing from the outlet ports of the rotor toward the opposite sides of the course between the stator and rotor.

9. In a centrifugal pump, a stator, a rotor within the stator in concentric relation thereto and the stator and rotor defining an annular fluid course between them, said rotor having peripheral outlet ports in centralized relation to the rotor and the stator having an annular dividing web midway of the width of the stator and in close relation to the outlet ports of the rotor, whereby to divide the streams issuing from the rotor ports toward opposite sides of the course between the stator and rotor, the inner peripheral wall of the rotor and the outer peripheral wall of the stator tapering toward I the central radial plane of each, and the rotor'being formed with an intermediate exterior radial rib or fin through which the ports extend. r

' 10. A centrifugal pump comprising a stator and a rotor mounted within which, said stator and rotor defining an annular fluid course between them, the rotor having a peripheral annular radial flange with outlet ports extending therethrough, and the stator having outlet ducts on opposite sides of the rotor with their entering ends closer to the axis of the rotor than their outlet ends, means for directing said streams issuing from the rotor ports to opposite. sides of the rotor and through the outlet ductsof the stator, a siamese connection into which the outer ends of the ducts of the stator dis charge, and a controlling vaneoperable from the exterior, of the stator and-located in the siamese connection for constricting one or the other of the outlets from the stator. f a

stator and a rotor mounted within it, said stator and rotor defining an annular fluid course between them, the rotor, having a pe ripheral annular radial fin with outlet ports extending therethrough, and therstator having 'outlet ducts on opposite sides of the rotor with their entering ends closer tothe axis of the rotor than their outlet ends, means for directing the streams issuing from the rotor ports .to opposite sidesof the rotor and through the outlet ducts of the stator, a siamese connection into which the outer ends of the ducts of the stator disrotor tending to move the latter axially are counter-acted and the rotor is caused to maintain a sensibly-constant position in the stator, and has a floatingsupport in the fluid passing through the pump,

In testimony, that I claim the foregoing as my own, I havehereto aflixed my signature. 7'

ROBERT HUGH CARSON.

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