US860465A - Centrifugal fan. - Google Patents

Description

No. 666,466. PATLNTLD JULY 16, 1967.v R. HANCOCK 6 R. 1*. HALL.

CBNTRIPUGAL FAN.

APPLIGATION FILED 1166.13, 1906.'

4 SHEETS-SHEET 1.

WITNESSES GBNTRIPUGAL FAN.

APPLIUATION FILED DBO.13. 1906.

4 SHEETS-SHEET 2.

WITNES'SES` No. 660,465.v `1 ATBNTED JULY 16, 1,907.

R..HAN606K 6E R. F. HALL.

CENTRIPUGAL FAN.

APPLICATION FILED DEO. 13| 1908.

4 SHEETS-SHEET 3.

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. L) Id F /2 w sv TNEssEs lfwmfa W Re?, Z/v/o Hmz coc/ Egger ffe era c: Ha ZZ No. 660,465. A PATBNTED JULY 16, 1907. `R. HANCOCK 6L R. P. HALL.

CENTRIPUGAL PAN. AIfPLIoATIoN FILED 6110.13, 1906.

4 SHEETS-SHEET 4.

WITNESS ES UNITED STATES PATEIWI- OEEIOE.

' RALPH HANCOCK, OE LONDON, AND ROBERT FREDERICK HALL, OE BIRMINGHAM, ENGLAND.

GENTRIFUGAL FAN.

Neg. 860,465.

Specification of Letters Patent.l

Patented July 16, 1-907.

spplieeei'eenea Deeember 13,1906. seriel Ne. armas.

' ing Cross House, Charing Cross Road, London, W. C.,

the runner through a suction eye or opening in the cas-l ing which incloses the said runner and is 'discharged centrifugally through the ports or spaces between the runner blades, and is applicable to both singlesuction fans of the typewherein the suction eyeis arranged at oneside ofthe casing, and also to double suction eye fans wherein a suction opening is formed in each side of the casing andv two sets of centrifugalacting blades are arranged to project from the opposite sides respectively o f a single central disk and to be supported at their outer ends byrings whose diameters approximate to t the diameters of the suction eyes in the casing sides to .which they are respectively opposed. 1

The objects of the said invention are to increase the.

efficiency and utility or general adaptability o'fans of `this type by the employment of runner blades of special construction, and by the use of a fan casing which is capable of being arranged so that it will discharge the air delivered by the runner in any desired direction, without 'necessitating any substantial'modification or .l change. in the structure of the casingitself, as is usually necessary.

. Figure lof the accompanying drawings represents an end elevation of a cased centrifugal fan of the single "suction eye type constructed in accordance with our.

invention and with the adaptable casing arranged to give afleft-handed ,undercast delivery. Fig. v2 repre# Asents partly in section and partly in elevation land upon an enlarged scale, the runner of the improved fan separately. i Fig. 3 is across section of the complete fan uponthe same scale as Fig. 1. Fig. 4 is a longitudinal section, taken upon the dotted line rc3 Fig. 3. Fig. 5 shows an edge view ofono Of the spcial blades of the runner; Fig. 61s an elevation thereof; IFig. 7 'is a sectional view of the same; Fig. 8 is a sectional view of a modification; Figs. 9 and 10 are views of the fan with l the adaptable casing arranged to give an oblique up- 'werd discharge from theiea-hendeide; rige. 111e '1'6-- are front vand side views of the fan casing in its various Y relative positions.

The/same letters of reference indicate correspondi ing parts in the several figures of the drawings.

n. The runner frame of the improved fan consists of an end ring .or circular plate 1, riveted to a central boss -4 or extended hub 2 which is keyed-to the runner shaft and a second ang1e-iron ring 3 arranged at the opposite end or side of the structure and supported ronrthe exf tended hub by a series of stay arms 4 radiating at right angles from the said hub as shown in Figs, l and 3. Theseries of air-collecting and discharge blades 5 are arranged transversely between the end supports and are formed from sheet or wrought metal plates, pressed, stamped vor otherwise fashioned, and connected at their opposite extremitiesby rivets or other astenings tothe said supports.

Each blade is of an undulatory figure in its longer direction so as to produce therein a plurality of concaved or curved grooves 6 .running across the acting face-of the said plate at right angles to the length and this grooved or corrugated formation is compounded with the fashioning of each plate'into asingle curved configuration in cross section as shown in Fig. 5 or a doublecurved configuration as shown in Fig. 6 whereby their acting faces are spooned and the power and efficiency ofthe fan are increased as already described.

The open intake end of the runner is of approxivmately the same diameter as the suction eye 7 in the side 8 of the casing and it will be understood that the increased surface obtained by virtueof the undulatory section enables the blades to be provided, as it were,

with a series of pocketsadapted to hold the air in such A a way that it will meet a very high pressure before slipping out, so that the air is retained in the blades and a larger quantity is discharged when the centrifugal action takes place. Further air is picked up practically over the entire length of each blade and a very equal' discharge occurs over the whole surface.,V the action being entirely different to that which is Another advantage derived from the pocketing is' that they tend to prevent the rushing of the air towards the blank disk at the closed end of the runner and so checks ,any churning action while .the whole of the additional working surface lobtained by the special blade formations iseffectively untilized in the work of retaining and projecting theair.

Thefan runner is mounted, as shown inthe drawings, within theI casing 9, which is constructed as a complete and .self containedlement, separate -from its i foundation bracket orpedestal 10 whichis alsoa separate and self-contained element, said `casing being so formed andarranged that it may be set with its discharge outletv in any desired positionytaccordingto vthe type of fan required) with respcct'to the said -pedestal or .foundation bracket prior to'the ,two com casing is formed.

`curve commencing from a point which lies in the same plane as the center of the body portion wherein the- `runner is fitted `and terminating at a pointin the same plane as the commencement of the said volute curve. This formation produces on oneside of the casing aflat surface ll'which is tangential to a circle struck from the center of the runner axis, and in this dat side or part the outlet or discharge orifice 20 o the It will vbe obvious that by placing the casing with its discharge on either the right or left hand of the runner center and then turning the same bodily around said centerto a greater or less degree the casing may be set or arranged so as to discharge in any direction, and on bolting or securing the same to the base or foundation bracket after such adjustment, a fan of either the undercast, overcast, downcast vertical delivery or oblique delivery type (such as shown in Figs. 6,v 7 and 8) can be expeditiously produced or made up, and easily modified or altered subsequently to another type if necessary.

The separately formed vbracket or foundation piece used in connection withlhe adaptable volute-shaped vcasingabove described may be constructed in any convenient manner which will afford an effective support and strengthen reinforce or stiffen the casing. The bracket shown in the drawings takes the form of a shoe-like structure and consists of a pair of side plates l2 secured together and held in their proper relative positionsand at the correct distance apart by stay bolts 13 and having lengths of angle iron 14 riveted along 'the bottom edges of their outer side to serve as feet or bearing flanges which afford a rigid andextended support for the complete structure, while the inner sides of the connected and laterally braced plates are provided with vbearer flanges l5 which may also be formed from lengths of angle iron, riveted to kthe said plates, after having been first bent to conform to the curvature of iheparticular part of the voluted side 16 of the casing body. which is to come within the shoe and which, when applied i such desired relative position to the said shoe, fits closely' againstvand takes its seating upon the said bearer flanges, prior to the two component elements of the structure being per' manently riveted together. Or instead of the shoe or foundation bracket being constructed from sheet metal andangle iron components, it inay be made from a shoe-like casting into which the bottom or underside portin of the casing is dropped and secured by riveting or otherwise.

It is obvious that the application of the herein described invention to fans of the double suction type differs in no essential respeet from its application to a single suction type as herein described except that two sets of blades are employed all-d arrange'd respec-Y tiyely upon the opposite sides oi a single closed disk or plate and are supporicd'ai their ouicr cnds by angle iron or similar rings: and that a suction c ve or intake opening is formed in each side oi` the casing body in register with the'rcspective open or intake ends of the double runner.

Having'now fully de.-ribed my invention what I desire to claim, and secure by Letters Patent is'.-

1. In a cased centrifugal fan: the combination with a casing having u large intake or suction eye in one side, of :l runner consistingY of :i plurality of lou;r and narrowblades having un undulatory or zigzag formation longitudinaily and a curved radial [ovulation substantially :is described.

2. In :i cased centrifugal fzln; the combination with a casing' having n large intake or suction eye, ot' n runner which is arranged within the casing and consisting of long and narrow blades arranged upon :i single disk or plate;

'said blades being of :in undulntory or zig-zag formation longitudinally :1nd ot" a curved formation radially substantially :is described.

Il. 1n a c sed centrifugal fan: the combination with a casingr having' :i ini-ge intake or suction eye in the one side, of u runner consisting ot' n plurality of long.'` and narrow blades lniving :i series oi' laterally separated air pockets or spoon like parts produced by making the blades of an undulatory or zig-zug fornnitiony longitudinally and a double curved cross section or radial formation laterally; said blades being: attached :it the ends furthest removed from the suction eye of the casing upon n disk or plate supported by the fan axis while their other endsare attached to a carrier ring. substantially as described.

-i. In a cased centrifugal fan; the combination with a casing having :i large intake or suction eye in the one side of :i runner consisting of a plurality of long and narrow.

blades having: un unduiatory or zigzag formation longitudinzilly andn curved formation radially, n disk or plate l'or supporting the inner ends of said blades: a ringr for supporting. said blades; a hub carried by the runner shaft, and a series of stay arms extending at right angles from' snid hub iolthe binde-supportingring, substantially as described.

o. In a centrifugal t'an. the combination of arcasing a runner consisting' of a plurality of'long and narrow blades having an uudulatory formation longitudinally and s curved formation radially. an end plate associated with the blades for supporting' the sume, a ring' having con nection with the blades and arranged at the intake end of the casihg, and a' foundation for adjustnbiy supporting the casing.

i. In a centrifugal fan. the combination of a casing having a discharge outlet, and an intake at one side thereof, u runner rotatably mounted in the casing und consisting of a plurality of long and narrow blades 'having' a zigzag formation longitudinally and a curved formaltion radially, :i disk for supportingT the inner ends of said blades. a ring for supporting the opposite ends of the lutter. a runner shaft, a liulrhaving connection with the ring and disk nndassociated with the shaft, and afshoe supporting element forming a foundation for the casing.

In. testimony whereof` we have Yhereunto set our hands -in presence of two subscribing witnesses.

RALPH HANCOCK.

ROBER'l` FREDERICK HALL.

Hall

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