US1003542A - Centrifugal pump or blower. - Google Patents

Description

J. STOETZEL.

GENTRIFUGAL PUMP 'on BLOWER.

APPLIOATION FILED JUNE 5, 19 11.

Patented Sept. 19,1911.

2 SHEETS-SHEET 1.

' JPJ. S TOETZEL. GENTRIFUGAL PUMP 0R BLOWER.

APPLICATION FILED JUNE 5, 1911.. 4

Patented Sept. 19, 1911.

2 SHEETS-SHEET 2.

OFFTCE.

J'QIISEPH J. STOE'IZEL, Oi CHICAGO, ILLINQKS.

CENTRIFUGAL PUMP OR- 3140 37131? $pecificationof Letters l atent. Patented Sephilg, 1911.

fipplieation filed June 5, 1:311. Serial no. caress.

1'0 all whom it may concern:

Be it known that 1 JOSEPH J. SToE'rzEL, a citizen of the United States of America and a resident of Ehicago, county of Cook, State of Illinois, have invented certain new. and

,useful Improvements in Centrifugal Pumps or Blowers, of which'the followingis a specification.

The main objects of this invention are to provide an improved form of centrifugal pump or blower having an improved construction and arrangement of its vanes, whereby the fluids operated upon'will be gradually set in motion so as to reduce losses due to impact'of the vanes upon the fluid, whereby the losses due to eddy currents will be reduced, and wherebythe inlet passages may be substantially (to-extensive with the radial extent ofthe vanes, thereby insuring that the fluid will completely fill the spaces between the vanes and also insuring a -uniformly distributed discharge throughout the entire peripheral area of the rotary member.

An illustrative embodiment of this invention is shown in the accompanying drawing,

taken on line AA of Fig. 1. Fig. 3 is afragmentary detail ofthc rotary member taken on line B-B of Fig. 1 and illustrating. the relative arrangement of the vanes on the rotary member.

In the construction shown in the draw,

ings, the housing or casing 1 is supported on the base 2 and has axial air inlet openings 3 on oppositesides thereof and a tangential air outlet opening 4. The casing 1 may be of any suitable form, and is shown in the drawings as being of the usual volute shape.

The fan or rotary member comprisesa pair of corneal plates or end members 6 and 7 arranged with theirconcave faces op posed and spaced apart axially to form a contracted peripheral opening between their outer edges. These plates are of less diameter than the interior of the casing, affording the usual space 5 between the periphery of the plates and the casing 1. Each of these plates has a centrally disposed air inlet opening 8 located in axial alineme nt with the inlet openings 3 of the casing 1. A disk 9 ofle'ss diameter than the plates -6 and 7 and slightly tapered toward its periphery is centrally arranged between the plates 6 and 7 and rotatable therewith- Two sets of vanes 10 are respectively secured to the opposite sides of the. disk 9 and extend radially outward to the peripheral opening between the outer edges of the plates 6 and 7 their outer ends being substantially in the same plane of revolution. The vanes 10 are of channel shaped cross-section and have side flanges 11 facing in the direction of rotation. Two additional sets of vanes 12 are secured to the inner surfaces of the conical plates 6 and 7 and extend outwardly to the peripheries of said plates. These vanes may be of angle-shaped cross section and are disposed. with one leg or flange 13 spaced away from its respective end plate and facing in the direct-ion of rotation. Thus the vanes 12, together with the respective end plates, are in eflect also of channel cross section. i r

In the form shown, there are thus four sets'of vanes and these are arranged in groups of four, one from each set, the inner ends of those in each group being in axial alinenient. The outer ends of all of the vanes are arranged one in front of the other in circumferential alinement. The vanes 12 terminate atthe edge ofthe openings 8, the vanes 10 extend a little nearer to theax s. In the form shown, the vanes .10 and 12 are each of substantially uniform width throughout their length, -the width being equal to the distance between the end members 6 and zit-their peripheries. The inner ends of the dilferent sets of vanes are spaced apart axially toprovide the annular spaces 14 at opposite sides of the disk 9' between the adjacent edges of the vanes, these spaces communicating. with the air inlet openings 3 and 8- and converging upwardly to the point 15 where the paths of rotation of the vanes of different sets become coineident. The disk 9 also serves to separate theair currents which-enter from opposite sides of the casing.

The plates 6 and 7 and disk 9 are fixed on the shaft 16 journaled in bearing 17 at opposite sides of the casing 1. A pulley 18 is secured to the outer end of the shaft 16 by means of which the rotary member is driven. In the form shown, the plates .6 and 7, in addition to carrying the vanes 12, aresecured at their outer edges to the vanes and their edges are braced by arms l9.

The operation of the device shown is as follows :-,As the vanes rotate, the air in the spaces between them is rotated and caused to flow centrifugally outward along the vanes 10 and 12. In devices of-this nature, the air in the paths of the vanes increases in density as it approaches the periphery ofthe wheel by reason of its inertia tendency to form a partial vacuum in the spaces immediately behind the vanes. If these spaces are not kept filled with air, the air will leave the vanes and in the form of a succession of jets which expand in the space within the casing and there is thus a' decided loss in efficiency. In prior blowers, it has been foundnecessary to make the vanes comparatively short radially to reduce this tendency. In the present invention, by virtue of the spaces 14, air is supplied to the vanes not only at their innerends, but also all along their edges. The vanes being of channel-cross 'section,'their flanges preventthe air in front of them from escaping at the side, but allow new air from the spaces 14 ency of the air to be drawn in from the to flow freely intO-the ath of the vanes to 30- ofi-s et the tendency "to the. formation of partial vacuums immediately behind the vanes. i

It will thus be seen that the spaces within the paths of the vanes 10 and' 12 are kept full. of air practically all of the time, and that for this reason, the air is discharged at the periphery of-the wheel, not .in the, form of a series of jets but in the form of'a' continuous unbroken stream extending over the entire area of the periphery of the wheel.

There istherefore no back-lash or tendspace 5 back into the vanes at their ends as is the case in structures where the vanes are not fully supplied with air. Thus,1with this device it is possible to keep the air in I the casing at a uniform pressure and as it is discharged from the outlet 4, thearea of the discharging air current is substan-" tially equal to the e'fi'eetive area of the opening.

this inventionis herein shown and described, it will be understood that numerous. details .of the. construction shown may be altered or omitted without. departing from the spirit of thisfinvention, following claims.

as definedby the I claim-: i

1. In afdevi'ce'of the vanes adapted to teceive'fluid at. their inner ends and discharge it] at their outer ends, a 4 second set of vanes also adap'tedto receive "@fiuid at their inner end sand discharge it at and the impact of the vanes and there is a.

class described, thetheir outer ends and having their inner ends .said first set of vanes, both of said sets of -vanes having their outer. ends located in substantially the same plane of revolution.

2. In a device of the class described, the combination of two sets of radially disposed vanes each adapted to receive fluid at its inner end and discharge it centrifugally at its outer end, the'inner ends of the vanes in one set beiiig spaced axially from those in.the;other"set and the outer ends of said vanes being located substantially in the same plane of revolution.

3. In a device of the class described, the combination of a plurality of sets of radially disposed vanes, each set being adapted to receive fluid at. its inner end and discharge it at its outer end, the inner ends of the vanes in each set being spaced axially away from. the inner ends of the vanes in the other sets, and allof said vanes being disposed so that their outer ends are substantially in the same plane of revolution."

' 4. In a device of the class described, the combination of aseries of radially disposed vanes adapted to receive fluid at their inner ends'and discharge it at their outer ends, said vanes havin etheir outer-ends arranged substantially in t e'same plane of IBXOllltlOll and having? their innersends arranged in staggered relationfwith respect to such plane of revollltlbl}; v

5, In a device;- ofjthe' class described, the vcombinetion of two sets of radially disposed vanes each adagted'to receive fluid at its inner end and ischarge it centrifugally at one set being spaced axially from those in the other set and the outer ends of said .vanes beinglocated substantially in the same plane of revolution, the axial spacing of the inner ends of the vanes being such as paths of rotation of the vanes.

6. In adeviceof the-class described, the combination of two sets of radially disposed vanes each adapted'to receive fluid at its inner end' and discharge it centrifugally at its outer end, the inner ends of the vanes in one set being spaced axially from those in Although but one specific embodiment of the other set and the outer ends of ,said

same plane of revolution, the axial spacing of the inner ends of the vanes and the shape of the vanes being such that. the paths "of rotation of said vanes are distinct and spaced apart adjacent to theaxis, but converge'towardeach other at'their outer ends.

7. In a device of the class described, the combination of two sets of radially disposed vanes each adapted to receive fluid at its inner end and discharge it centrifugally at its outer end, the, 'inner ends of the venesin one set being spaced axially from its outer end,'-the inner ends of the vanes in vanes being located substantially in the spaced axially away from'the inner-ends of to provide an annular air space'between the those in the other set, and the outer ends of said vanes being located substantially in the same plane of revolution, and a disk interposed between the inner ends of the vanes of different sets so as to cause each to draw fluid from its respective side of the device.

8. In a device of the class described, the combination of two sets of radially disposed vanes each adapted to receive fluid at its inner end and discharge it centrifugally at its outer end, the inner ends of the vanes in one set being spaced axially from those in the other set and the outer ends of said vanes being located substantially in the same plane of revolution, each of said vanes being substantially channel-shaped in transverse section with its open side facing in the normal direction ofrotation of the vanes. 9. In a device of the class described, the combination of two sets of radially disposed vanes each adapted to receive fluid at its inner end and discharge it centrifugally at its outer end, the inner ends of the vanes in one set being spaced axially frointhose in the other set and the outer ends "of said vanes being located substantially in the same plane of revolution, and a air of end plates secured against opposite sides of said vanes, being open at their middle part and spaced apart at theirouter edges.

10. In a device of the class described, the combination of two sets of radially disposed vanes each adapted to receive fluid at its inner end and discharge it centrifugally at its outer end, the inner ends of the vanes in one set being spaced axially from those in the other set and the outer ends of said vanes being located substantially in the same plane of revolution, a pair of end plates secured against opposite sides of said vanes, being open at their middle part and spaced apart'at their outer edges, and a casing surrounding said vanes and end plates, being in open communication with the space between said plates atthe edges thereof and having an outlet opening.

11. In a device of the class described, the

combination of two sets of radially disposed vanes each adapted to receive fluid at its inner end and discharge it centrifugally at its outer end, the inner ends of the vanes in one set being spaced axially from those in the other set, and the outer endsof said vanes being located substantially in the same plane of revolution, each vane in each set being of substantially uniform transverse sectional t'orm throughout its length.

12. A device of the class described, comprising a supporting frame} a. shaft journaled therein, a hub member rigidly mounted on said shaft, ,two sets of radially disposed vanes secured to'respectively opposite faces" of said hub member, being spaced apart at their innerends and in-- clined toward each other at their outer ends,

a pair of end plates spaced apart at their middle part and inclined toward each other cent edges of said vanes, communicatingdirectly with said air inlet.

14. In a centrifugal blower, the combination of a casing having air inlet and outlet openings, a fan member rotat-ably mounted in said casing and having vanes thereon, the inner ends of said vanes being spaced apart axially and the outer ends being spaced peripherally in the same plane of rotation, so as to provide an annular air space between the paths of adjacent edges of said vanes.

.15. In a centrifugal blower, the combination ofa casing having air inlet and outlet openings, a ,pair of members rotatably mounted in said casing, said members being s spaced apart axially and relatively inclined toward each other, a plurality of radially disposed vanes carried on the opposed surfaces of said members, the width of the inner ends of said vanes beingless than half the distance between the'adjacent parts of said members so as to provide an annular .air space between the adjacent edges of said I .vanes.

"16. In a centrifugal blower, the combination of a casing having air inlet and outlet openings, a pair of conical end members bers being spaced apart axially with their concave surfaces opposed, a plurality of radially disposed vanes carried on the concave surfaces of said members, said vanes having a uniform width substantially equal rotatably mounted in said casing, said memto the distance between said members at their peripheries, and the concavity of said members being such as to provide an annular air space between the-adjacent edges of said vanes and communicating with said air inlet.

, 17. In a centrifugal blower, the con1bination of a casing having axial inlet and peripheral outletopenings, a pair of conical end members rotatably mounted in said cas ing and provided with axial air inlet openings, said end members being spaced apart axially with their concave surfaces opposed, a .disk of less diameter than said members arranged centrally between said members and rotatable'therewith, a plurality ofvanes carried on the opposed surfaces of said members and disk, said vanes being of a substantially uniform width substantially equal to the distance between said members at their peripheries whereby they are spaced apart axially at their inner ends so as to provide annular air spaces'between the adjacent edges of said vanes and disk and communicating with said air inlet openings.

18. In a centrifugal blower, the combination of a casing having air inlet and outlet openings, a pair of conical members rotatably mounted-in said casing, said members being spaced apart axially with their conical surfaces opposed, a disk of less diameter than said members arranged between them and rotatable therewith, a plurality of vanes car; ried on the opposed surfaces of said members and disk, the vanes carried by said disk being of. channel cross section with side flanges disposed in the direction of rotation. and the vanes on said members being of angle cross section with the flange spaced away fromsaid members and disposed in the-direction of rotation, said vanes being substantially equal in width to the space between said 'meinbers at their peripheries and being shaped soas to be spaced apart at their inner ends so as to provide annular air spaces between the adjacent edges of the adjacent sets of vanes.

'19. In a centrifugal blower, the combination of a casing having air inlet and outlet openings, a pair of members rotatably mounted in said casing and spaced apart axially, a plurality of vanes carried byone of said members, said vanes extending across the space bet-ween said members at their peripheries and being spaced away from the other member at their inner ends so as to provide an annular air space between said vanes and said other member.

20. In a centrifugal blower, the combination of a. casing having air inlet and outlet openings, av palr of members rotatably mounted in said casing and spaced apart aXially,- a plurality of vanes extending across the space between said members at their peripheries and being spaced away from the other member at their inner ends so, as to provide an annular air space be tween said vanes and said other member, and each of said vanes having a forwardly extending flange on the edge opposed to said other member. I s

21.- A device of the class described, comprising a pair of end plates rot-atably mounted, being spaced apart and open at their middle part and converging toward each other at their peripheries, two sets of radially disposed vanes respectively secured against said plates, said vanes being each of a width at their outer ends corresponding substantially to the space between the peripheries of said plates, and being of a width at their inner 'ends considerably less than the space between the adjacent parts of said end plates, thereby providing a conical air space bet-weenfthe two sets of vanes and communlrating with the middle openings of said plates, each of said vanes having at 1ts mner edge a forwardly directed flange adapted to collect the air in front of the advancing face thereof and direct said air radially outward along such face.

22. A device of the class described, comprising a pair of end plates, rotatably mounted, being spaced apart and open at their middle part and converging toward each other at their peripheries, two sets of radially disposed, vanes respectively secured against said plates, said vanes being each of a width at their outer ends corresponding substantially to the space between the (peripheries of said plates and being of a wi th at their inner ends considerably less than the space between the adjacent parts of said end plates, thereby providing a conical air space between the two sets of vanes and conimunicating with the middle openings of said plates, each of said vanes having at its inner edge a forwardly directed flange adapted-t0 collect the air in front of the advancing face thereof and. direct said air ra dially outwardly along such face, said forwardly directed flanges being of a width at their inner ends considerably less than the space between successive vanes of the same Signed at Chicago this 3rd day of June JOSEPH J. STOETZEL.

VVitness'es:

EUGEN A. RUMMLER,

A. J. A. W'rLLIAMs.

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

' Washingto11,1).G. w

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