US2644724A

US2644724A - Feeder for fluid current conveyers

Info

Publication number: US2644724A
Application number: US220672A
Authority: US
Inventors: Kronstad Haavard
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-04-12
Filing date: 1951-04-12
Publication date: 1953-07-07
Anticipated expiration: 1970-07-07

Description

July 7, 1953 H. KRONSTAD FEEDER FOR FLUID CURRENT CONVEYERS 3 Sheets-Sheet 1 Filed April 12,. 1951 8 IN V EN TOR.

HAAVARD LKROINSCDQD flTTORNEZY J y 7, 1953 H. KRONSTAD 2,644,724

FEEDER FOR FLUID CURRENT CONVEYERS Filed April 12, 1951 3 Sheets-Sheet 2 P- A O A IN VEN TOR. HEHVARD o s TAD PIITORN/EY y 7, 1953 H. KRONSTAD 2,644,724

FEEDER FOR FLUID' CURRENT CONVEYERS Filed April 12, 1951 3 Sheets-Sheet 3 IN VEN TOR. HAm/ARD KRONSTAD ATTORNEY Patented July 7, 1953 UNITED STATES PATENT OFFICE FEEDER FOR-FLUID CURRENT CONVEYERS Haavard Kro nstad; near Mahoni'ngtown, Pa. 4 Application April 12, 1951, Serial No. 220,672

This invention relates to the feedingto a pipe line of pulverized, granular, and .other material capable of being propelled in a fluid-current conveyer.

It is an object of the inventionto provide'improvements in apparatus .for that purpose that includes a drum-likehousing containing a feedwheel formed with radial vanes affording pockets that receive the material at one place of their revolution and from which the material-is blown at another place into apipe line or other conveyer conduit.

More specifically, it is an object of the invention to provide means for easy axial adjustment of the wheel to compensate for Wear of certain parts during rotation of the wheel.

Further, it is an objectto provide, in apparatus of that kind, a formation and arrangement of parts that makes practicable the easy disconnec-.

tion and displacement of elements, and reassembly of elements when it :is necessary to remove worn parts and to substitute unworn ones.

Moreover, it is an object to provide, in such an apparatus, such an arrangement and coordination of parts such as constitutes a='compact and satisfactory machine, as hereinafter 'set forth.-

When considered'with the descriptionherein;

14 Claims. (01. 302-49) characteristics of the inventionare apparent in' a the accompanying drawing, forming-part hereof,

wherein an adaptation of the 'invention'is disclosed for purpose of explanation.

Like reference-characters refer to corresponding parts in the views of the drawing, of which- Fig. 1 is a longitudinal section on line I|-, Fig. 2;

and disposed substantially parallel to each other;

A closing peripheral wall I0 is attached to, or may be made integral with the side Wall 8. The wall [0 has an inner smooth surface ll that is concentric with, and inclined longitudinally of the apparatus to, a'ldr'ive shaft hereinafter referred to. The wall I 0 is formed at its edge remote from the wall 8 with a radially'and outwardly disposed flange ring 12, against-which the wall 9-closely Fig. 2 is a transverse section on-line 2-2,

fits and to which it is removably secured. These walls encompass a feed chamber, into an upper arc of which leads a feed conduit.l3 through a feed port 14 and from the opposite lower arc of which a-discharge port [5 communicates with a discharg conduit I6 connectable with a conveyer conduit.

The feed conduit is provided with an air-.-

Each of the side walls 8 and 9 has a centralopening of a size to accommodate certain parts later referred to, the openings being coaxial with the drive shaft.

The wall 8 is formed around its opening with an outwardly extending tubular part [9, which has at, its outer end a radially disposed fiat ring 20.

A plate 2| conforms to and is fixed closely against the ring 20. The plate is an outer end part of a hollow fixed nave 22, which extends through the tubular part I9 into and across the feed chamber into the opening of side wall 9, and which is held'against rotation by the plate 2 I. A compressed .air conduit 23 is connected to the plate 2! and communicates with the interior of the nave, which is closed at its other end. The

navehas an exit port 24 in its side in alignment with the discharge port 15. The outer surface 25 is smooth and of a taper of an inclination opposite to, but of the same angle of inclination as that of, the peripheral wall surface II; that is, these surfaces have convergent disposition to each other.

A feed wheel in the housing rotates on the nave. It includes radial vanes 26, with their inner and outer edges conforming in inclination to, and in contact with, respectively, the outer surface 25 of the nave and the inner surface H of the peripheral wall. The vanes are maintained in uniform spaced relation by connection to side plates 2'! and 28. The vanes and their connected plates aiford pockets into which material is fed through port I4 and from which it is discharged through port I5 by air emittedfrom the nave port 24.

The side plate 28 of the wheel is connected with an impeller 29. The impeller extends outwardly through the opening inhousing wall 9, and an end of the nave 22 fits closely into it; The impeller has a coupling flange 30, on its outer end. This flange is connected to a coupling 3!, which is held by set screws 32 fast to a. drive shaft 33 running in bearings 34 on columns 35 extending upwardly from the base 5; The shaft is rotated 3 by a wheel 36 fast thereon, the wheel being driven by any suitable means (not shown).

The end of the nave 22 that fits into the impeller 29 is formed with a socket member 31' into which extends an end part of an adjusting shaft 38, the shaft being secured in the socket by a bolt 39. That shaft is disposed in and extends beyond the outer end of the drive shaft 33. The outer end part of the shaft 38 is screw threaded, as shown at 40, and there it carries an adjusting nut 4| and a lock nut 42. A ball bearing device 43 usually is interposed between the end of the rotating drive shaft 33 and the nut 4|.

The material to be conveyed moves from. the feed conduit l3 into the pockets between the vanes 26 of the feed wheel, which rotates in direction indicated by the arrow in. Fig. 2A. .The;

wheel pockets successively reach alignment with the nave port 24 and the discharge port [5, and the material in the pockets is blown into the condu-it l6 and: into the conveyer pipe with which the conduit is connected.

It is desirable that elements of the feed: wheel moving in contact with the outer surface of the nave and with the inner surface of the peripheral wall; of the housing shall always have as close a running fit as practicable with those surfaces, so that air' and fine material particles may be prevented from leakage to the extent possible. Proper contact of wheel elements with those surfaces may be maintained by axial: adjustment of thefeed wheel against or with respect to the convergent or wedge disposed surfaces of the have and the peripheral wall. This adjustment ismade by turning the nut M on the non-rotating shaft 38 against the outer end: of the; drive shaft 33: connected with the feed wheel; with the result that wheel surfaces are wedged closer against correspondingly inclined surfaces of the nave. and the peripheral wall. If itoccursthat too close a fit has been attained, the wheel may be eased off by turning the nut in a reverse direction.

The necessary axial adjustment shift of the drive shaft 33 is not sufficient t'oappreciably dis-- place the drive-wheel 35 from alignment with the transmission element by which it isdriven.

The feed wheel may be bodily inserted in and withdrawn from the housin after removal of its sidewall 9. g

12 claim: r

1-. In apparatus to feed materialto a fluidcurrent conveyor, a housing encompassing afee'd chamber, having feed and discharge ports, and comprising a peripheral wall defining its perim eter, said wall having an inner smooth circular bearing surfacea nave fixed in. saidihousing con-l centric with: said bearing surface having. an: outersmooth bearing surfacathe bearing surfaces of said wall and said nave being inclined. in. sub-. stantially the same angle with respect to the-:nave. axis and in convergent disposition to eaclr other; afeed. wheelrotatable onsaidlnave with a tapered. bore conforming, respectively,. to the inclination: of said wall and nave surfaces, said wheel having pocketscommunicable successively with said. feed. and discharge ports, means to rotate said wheel, and. means to.- shift. said. wheelv axially.

2. In apparatus to feed: material to a fluid cur:- rent conveyer, a housing encompassing a feed chamber, comprising. a peripheral. wall defining itsv perimeter, said wall, having an inner. smooth circular bearing surface, said. housing having feed and discharge ports, a. hollow nave fixed said housing concentric with said; bearing surface,

having an. exit port. opposite to. said discharge 7&1. comprising a peripheral wall defining itsperim 4 opening and a compressed fluid entrance port, and an outer smooth bearing surface, the bearing surfaces of said wall and said nave being inclined in substantially the same angle with respect to the nave axis and in convergent relation to each other, a feed wheel having a periphery and a tapered bore conforming, respectively, to the inclination of said wall and nave surfaces, said nave being, disposed in. the bore of said wheel, said wheek having, pockets communicable successively with said feed and discharge ports, means to rotate said wheel, and means to shift said wheel axially.

3.. Inapparatus to feed material to a fluid current conveyor, a housing encompassing a feed chamber, having'fee'd and discharge ports, and comprising, a: peripheral wall defining its perimeter, said wall having an inner smooth circular bearing surface, a nave fixed in said housing concentric with said bearing surface having an outer smooth bearing surface, the bearing surfaces: of said wall and have being inclined. in substantially the same angle with respect: to. the nave axis and in convergent relation to each other, a feed wheel in said housingcomprising radial vanes affording pockets therebetween. successively communicable with said feed; and discharge ports; and having outer and; inner edges conforming in inclinatiem respectively, to' and; contactv with the inclined surfaces of said housing wall. and nave, means to rotate said wheeL. and means: to shift. said wheel axially.

t. In apparatus to feed materiali to a fluid current conveyeir, a housing encompassing a: feed chamber, having feed; and: discharge. ports, and

comprising a peripherak defining its perim.-

eten said wail. having; an; smoath circular bearing surface, a. hollow nave fixed in said housing concentric; with; bearing surface; having: an. exit port opposit to housing dis:-

charge port, are entrance port for fluid under.

pressure, and an; outer smooth bearing surface, the bearing surfaces of wall. and. said have being inclined in. substantially the; sameangle with respect to thenave: and in. convergent.- relation to each other, afeed where in said. hous1- ing: having: radial vanes affording pockets com municable successively with saidhousing feed andd-ischarge ports.- a-ndwith said have.- exit port, andhaving' miterv and; inner. edges conforming, in. inclination, respectively, to and normally in contact. with the inclined surfaces. of said housing wall-and. nave, means, ta rotate said wheel, and means to shift. said. wheel 5. In apparatus to feed material to a current conveyereahousing. encompassing a feed chamber, having feed and discharge ports, and

compris'mga peripheral wall. defining its perimeter, said wall having an inner smooth circular-'- bearing surface, anavefixedinsaid housing concentric with said bearing surface having an outer.

discharge ports; a drive shaftv connected. to.- said wheel, andmeans toshiftsaid shaft axially.

6. In apparatus to feed material to a current conveyor; a. housing; encompassing a feed chamber, having: feed.v and: dischar e ports, anding, respectively, to-the inclination ofsaid wall,

and nave surfaces,-.said wheel having pockets communicable successively with said feed and discharge -ports, a drive shaft connected to said wheel, an adjusting shaft in said drive shaft fixed to said nave, and means on said adjusting shaft to shift said drive shaft axially.

7...In apparatus, to feed material to a fluid- 7 current conveyer, a housingencompassing a feed chamber, having feed and discharge ports, and

comprising a peripheral wall defining its 'peri'm-' eter, said wall having aninner smooth circular bearing surface, a have fixed in said housing concentric with said bearing surface havingan outer smooth bearing surface, the bearing surfaces of said wall and nave being inclined in substantially the same angle with respect to the nave axis and in convergent relationto each other, a feed wheel having a periphery and a tapered bore conforming, respectively, to the inclination of said wall and nave surfaces, said wheel having pockets communicable successively with said feed and discharge ports, a drive shaft connected to said wheel, an adjusting shaft connected to said nave and extending through and beyond said drive shaft, the outer portion of said adjusting shaft being screw threaded, and a nut on said threaded portion operable against said drive shaft to shift it axially.

8. In apparatus to feed material to a fluid current conveyer, a housing encompassing a feed chamber and comprising a peripheral wall defining its perimeter, said wall having an inner smooth circular bearing surface, a nave fixed in said housing concentric with and having a smooth bearing surface aligned with that of said peripheral wall, one of said bearing, surfaces having convergent relation to the nave axis, a feed wheel having a bore in which said have closely is disposed and having a periphery in contact with and conforming to the bearing urface of said wall, and means to shift said wheel axially.

9. In apparatus to feed material to a fluid current conveyer, a housing encompassing a feed chamber and comprising a peripheral wall defining its perimeter, said wall having an inner smooth circular bearing surface, a nave fixed in said housing concentric with and having a smooth bearing surface aligned with that of said peripheral wall, one of said bearing surfaces having convergent relation to the nave axis, a

feed wheel having a bore in which said nave closely is disposed and having a periphery in contact with and conforming to the bearing surface of said wall, a drive shaft connected to said wheel, and means to shift said drive shaft axially.

10. In apparatus to feed material to a fluid current conveyer, a housing comprising a feed chamber and comprising a peripheral wall defining its perimeter, said wall having an inner smooth circular bearing surface, a nave fixed in said housing concentric with and having a smooth bearing surface aligned with that of said peripheral wall, one of said bearing surfaces having convergent relation to the nave axis, a feed. wheel having a bore in which said nave closely is disposed and having a periphery in contactwith and conformingv to the bearing surface: of said wall, a-driveshaft'connected to saidnwheel an' adjusting shaft in said drive shaft connected to;

said nave,rand means onsaid adjustingshaftito shift said drive shaft axially,

11. In apparatus to feed materil to afiuid" smooth bearing surface, the bearingsurfaces-of said wall and said nave being inclinedinsubstantially the same angle with respect to the. nave'axis and in'convergent disposition to each; other, a feed wheel rotatable on said nave, a feed Wheel having a periphery and a tapered bore' conforming, respectively, to the inclinationof sai'dwall and nave surfaces, said wheel having pockets communicable successively. .withwsaid feed and discharge ports,.an outwardly extenda ing drive. shaftconnected to said wheel; andan adjusting shaft connectedto'said nave and ex-;

tending outwardly therefrom insaid driveashaft,v and means on said adjusting shaft .to :shift said, drive shaft axially.

12. In apparatus to feed material to a fluid current conveyer, a housing encompassing a feed chamber, having feed and discharge ports, and comprising a peripheral wall defining it perimeter, said Wall having an inner smooth bearing surface, and substantially parallel side walls connected with said peripheral wall and having oppositely disposed openings; a hollow nave fixed in one of said side walls concentric with said bearing surface having an outer smooth bearing surface, the bearing surfaces of said peripheral wall and said nave being inclined in substantially the same angle with respect to the nave axis and in convergent disposition to each other said nave having'a lateral discharge port, and means to supply fluid under pressure to said nave; a feed wheelrotatable on said have having a periphery and tapered bore conforming, respectively, to the inclination of the bearing surfaces of said peripheral wall and nave, said Wheel having pockets communicable with said housing feed and discharge ports and said nave port, said wheel comprising an impeller extending outwardly through one of said housing side walls and having an end of said nave extending into it; a hollow shaft connected to said impeller; an adjusting shaft in. said drive shaft fixed to said nave; and means on said adjusting shaft to shift said drive shaft axially.

13. In apparatus to feed material to a fluid current conveyer, a housing encompassing a feed chamber, having feed and discharge ports, and comprising a peripheral wall defining its perimerter, said wall having an inner, smooth bearing surface, and substantially parallel sidewalls connected' with said peripheral wall and having cppositely disposed openings; a hollow nave fixed in one of said side walls concentric with said bearing surface having an outer smooth bearing surface, the bearing surfaces of said peripheral wall and said nave being inclined in substantially the same angle with respect to said nave axis and in convergent disposition to each other, said nave having a lateral discharge port, and means to supply fluid under pressure to said nave; a feed wheel rotatable on said nave having a periphery and tapered bore conforming, re-

spectively, to the inclination of the bearing surfaces of said peripheral wall and nave, said wheel having pockets communicable with. said housing feed and discharge ports and said nave port, said wheel comprisin an impeller extendin outwardly through one of said housing side walls and having an end of said nave extending into surface, and substantially parallel side walls con-:

nected to said peripheral wall and having oppositely disposed openings; a hollow naveifixed in one of said side walls concentric with said bearing surface having an outer smooth bearing surface, the bearing surfaces of said peripheral- Wall and said nave being inclined insubstantially the same angle with respect to said nave axis and in convergent disposition to each other, said nave having a lateral discharge port, andmeans' to supply fluid under pressure to said nave; a feed wheel rotatable on said nave having a periphery and tapered bore conforming, respectively, to the inclination of the bearing surfaces of said peripheral wall and nave, said wheel having pockets communicable with said housing feed and discharge ports and saidnave port, said Wheel comprising an impeller extending outwardly through one of said housing side walls and having an end of said nave extending into it; a hollow drive shaft connected to said impeller; an adjusting shaft in said drive shaft connected to said nave and extending beyond the outer end of said drive shaft, and means on the outer part of said adjusting shaft operable against the outer end of said drive shaft to shift said'latter shaft axially.

HAAVARD KRONSTAD.

References Cited in the file of this patent UNITED STATESPATENTS