US918894A - Fan-blower. - Google Patents

Description

A. T. N 0E.

PAN BLOWER. APPLICATION FILED SEPT.21,1907.

Patented Apr. 20, 1909.

3 SHEETS-SHEET 1.

I. i! Il lllllllll A. T. NOE.

PAN BLOWER. APPLICATION FILED SEPT. 21,1907.

Patented Apr. 20, 1909.

3 SHEETS-SHEET 2.

l'ozueijo A, T. NUE.

FAN BLOWER. APPLICATION FILED sBPT.21,19o7.

Patented Apr. 20, 1909.

3 SHEETS-SHEET 3.

Wmme@ UNITED STATES PATEN FFTQE AMON T. NOE, OF PARNASSUS, PENNSYLVANIA, ASSIGNOR TO ELECTRIC RENOVATOR MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

FAN-BLUME.

. Specification of Letters. Patent.

Patented April 20, 1909.

.To all whom it may concern:

Be it known that I, AMON T. NOE, a citizen of the United States, residing at Parnassus, in the county of Westmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Fan-Blowers, of which the following is -a speciiication.

My invention relates to fan blowers, and

, more particularly to devices of this character especially designed for use in connection with pneumatic'renovators.

The primary object of my invention is to provide a blower which shall be compact and powerful, While at the same time, light in weight, and capable of being readily moved from place to place.

A further object of my invention is to improve generally upon the construction and eliiciency of such apparatus.

With the above and lother objects in view my invention consists in the construction and arrangement of parts hereinafter described, and illustrated in the accompanying drawings in Whichz- Figure 1 is acentral longitudinal section of my complete blower, showing the motor for driving the same. Figi 2 is a perspective view of a casting constituting a part of the blower casing. Fi 3 is a side .elevation of the complete mac ine. Fig. l4 is a fragmentary side elevation of apart of the casing. Fig. 5 is a section through the casing along the line 5 5' of Fig. 3. Fig. 6'is a erspective view'of the fan .or blower, parts eing broken away to show the construction. Fig. 7 is a fragmentary side elevation showing a detail of thefan blades. Fig. 8 is a fragmentary sectional view, showing 'the valve, hereinafter described. s

Referring to the drawings in detail, my improved blower casing comprises the two half sections, 1, 2, preferably formed of cast metal. The casing is divided into two compartments by means of a diaphragm 3 which seats around its periphery in a groove formed in the casing and is held in osition by means of a series of screws, 6, w ich extend through the radial flanges 1', 2 formed on the half sections of the casing and secure the same together. The half sections 1, 2 are each formed, near their periphery with an annular enlargement or roove 4, 5 respectively. The purpose oi this enlargementis to provide a chamber in which the air may freely circulate, as by this means it has been discovered that greater force can be imparted thereto by the fan.

The .casting 1 is provided with 'a central opening 7, surrounded by an internally projecting flange,carrying at its inner edge a packing ring 9, of felt or suitable soft material. The casting 1 is also provided with an annular flange 8, considerably larger than the opening 7, and against w ich lits the llangededge 20 of a casting 10, the form of which is clearly shown in Fig. 2. This casting 10 is provided around its periphery with .Y

a series of ribs 18 formed with openings through which bolts 11 are adapted to pass and screw into lugs (not shown) carried by the casting 1 adjacent to the flange 8. On the other side of the casting 10 is the frame 13 of an electric motor, of any suitable make. rllhis motor frame is also provided with a seriesof lugs corresponding in position with the ribs 18 on the casting 10. lt will thus be seen that the bolts 11 serve to rigidly bind together the motor frame 1'3, the casting 10, and the casting 1, thus forming the same into a rigid structure.

As shown, the motor comprises the usual armature 14 and commutator 15, carried on a shaft 17, one end of which is journaled in a bearing formed in the outer extended end of the frame 13. It will be seen that the frame 13 forms a casin around the motor, entirely closed with `t e exception of an openin at one end which is coveredl by a pivote door 16. Any other suitable or desired design of motor may, however, be em# ployed, as the motor itself forms no part of end of the armature 14 and the center of v which 'serves as a bearing for the motor shaft. It will also be seen that the casting 10 has formed integral therewith a conduit 23,l

22, in which is located a valve casin from which, projects a nozzle 24 and a so a conduit 25,l provided with a flange 26, by

. rig. l y improved blower is shown best in Fig.

means of which it may be attached to any desirable form oi intake. l ln Fi 1 the reference character 21 indicates t e opening connecting the conduit 22 with the interior of the casting or casing 1D.

Within the valve' casing 23 is located a three-Way valve 27, by means of which communication may be established between the conduit 22 and either of the conduits 24, 25 as desired, '(see Fig.y 8).V The valve is provided with suitable means (not shown) by whichy it may be turned.

The annular enlargement 4, of the section 1, mer es into the tangential outlet conduit 2S as s own in Figs. 1, 3 and 4, and around the end of this conduit is formed a flange 29 which coincides with the plane of the flange 1. By this means the conduit 28 may be connected with another conduit hereinafter described.l f

The section 2, constituting the other half of the fan casing, is of similar general shape to the casting 1. lt is provided, however, with a relatively deep outwardly projecting ilange 30 surrounding a central opening 40, and with a plurality of radially extending, strengthening ribs 31, clearly shown in Fig. 3. The section 2 is also provided with an inwardly projecting flange surrounding the central opening 40 and carrying at its mner edge a packing ring 39 similar to the ring 9, above described. The central opening 40 1s closed by a plate 32, which, as shown in Fi. 3, is substantially circular but is provi ed with; a. sector shaped extension 36. This plate .-32 is provided at its center with a thickened portion 34, constituting a bearing for the extended end of the shaft 17, which portion 34 carries the cap 35. Strengthenin ribs 33 also extend radially from the thic ened portion or boss 34.

The sector shaped plate 36 'is adapted to seat upon apair of radial flanges 42 formed on the section 2` and thereby constituted a passage or conduit 41 which communicates at its inner end with the central opening 40, and at its outer end with "a conduit 28 as clearly shown in Fig. 5. IThis connection with the conduit 28 is ,accomplished by means of a junction box 37, having a flange lying in the plane of the flange 2 and which flan e is adapted to seataoainst the flange .29 a ove described, and to `e secured thereto by means of screws or bolts. A tubular enlargement 38 is formed on the plate 36 in` order to render the conduit 41 of necessary size where it passes the enlargement 5. (See` 6, and comprises two centrifugal fans-43 and 44, of the same diameter, and both mounted on the shaft 17, as hereinafter described, and

. located, one on each side of the dia hragm or partition 3. reference to Flg. 1 it will be Seen that the fail 44 is of slightly reater width than the fan 43, since it has een discovered that by this construction much greater eiciency can be secured.

As will be seen by reference to Fig. 6 each fan is made up of a pair of disks 45, 46, and 52, 53, referably formed of sheet metal, and secure as by means of rivets, to a plurality of radiating arms 47, 54, which are located betweenV the disks. These arms constitute the fan blades, and the disks on each side thereof serve to confine the air and thus enable the blades to im art motion thereto. The arms 47 are provide a-t intervals throughout their length with lugs 43 through which the rivets pass. These arms or blades are not exactly radial but substantially so being lowed out or cutaway near the hub on their concave sides as indicated at 50. The outer disk 45 is formed with a central opening 56,

and it will be observed that this cutting away ofthe fan blades does not extend farther outward from the center than the radius of this opening 56. The object of thuscutting away the blades adjacent the hub, is to )ermit of the free passage of the air into the interior of the fan. It is obvious that were the blades formed with a s uare edge at this portion of their length, suc 1 edge would obstruct the inflow of air to a very marked dcgree, and thusseriously interfere with the working of the fan.

The hub 49 to which the fan blades 47 are secured is of relatively large diameter and,

' as shown in Fig. 1, embraces the extended ,end of a second hub 51 to which the ian blades 54 of the fan 44 are secured. The hub 51 is made rigid with the shaft 17 by means of a suitable in, and the hub 49 is also coupled to the ub 5l by means of a pin, as 55. The outer disk 53 of the fan 44, is provided with a central opening 57, which is considerably larger than the corresponding opening 56fin the disk 45. rFhis is necessary, in order to allow of the free passage of air to the larger fan 44. v From Fig. 1 it will be seen that the packing rings 9 and 39 bear against the outside of the disks 45 and 52 respectively, and thus form an effective seal to prevent leakage of air around the fans and to compel all of the air to pass through the same.

It is obvious, that the machine as above described may be used either to produce a suction, or as a blower. The air enters the casing through either one of the conduits 24 or 25 according to the position of the. valve,

and passes thence through the conduit 22 eiegeeaf into the casingflO. From the casing 1() the air is drawn into the fan 43 through the centrai o ening 56, .and is thence driven by centri 'ugal force out through the tangential outlet 28. F rom this it is sucked on through junction box 37 and conduit 4l, into the fan 44 through the central opening 57, and is finally driven from the periphery of fan 44 out through tangential discharge port 58 (see Fig. 3).- It is apparent therefore that the two fans act in series, each serving to impart motion to the air, and since the air enters the narrower fan first and then encounters the wider, it is ap arent that a strong additional impulse wi be imparted to the air by the second fan. When the apparatus is to be used as a suction device for pneumatic cleaning, a suction nozzle or sweeper will be attached tb one of the conduits 24 and 25, while a suitable dust collector is secured to the discharge port 58.

On the other hand, if it is desired to use the device as av blower, pure air will enter through the conduits 24 or 25 and be discharged pthrough the ort 58, to which ,'then, a suitable hose or ot er connection may be attached. It is found in practice that a blower'constructed as abovey described is.

very eflicient and gives an unusually large pressure for its size and speed.

1t is obvious that, while l have shown and described a double or compound fan, many features of the invention are equally appligable to an apparatus employing but a single lt will thus be seen that 1 have provided a very complete, compact, and effective machine for creating an artiiicial draft for any purpose whatever, and it is thought that the numerous advantages of my invention will be readily a preciated by those skilled in the art.

What claim is l. In combination, a fan blower casing, comprising two half-sections fitted to fether, a diaphragm having its edges detachaibly secured to the sections, and extending across said casing so as to divide the same into two air tight compartments, a conduit leadin from the periphery of one compartment and discharging centrally into the other oompartments, a discharge pipe leading tangentially from said last named compartment, a shaft extending through a central opening in said diaphragm and the walls of said casing, said diaphragm being otherwise imperforate, and centrifugal fans mounted on said shaft, one in each compartment each fan comprising apair of disks having blades secured between the same, the said compartments being of the same size, and of greater diameter than said fans, whereby a free space is provided between the periphery of said fans and the outer walls of the casinw, the

constructlon and arrangement of partseing such that the fans and diaphragm may be removed and separated, when one section of the casing is detached from the other.

2. In combination, a fan blower casing, a diaphragm therein dividing the casing into two compartments, a shaft extending through said diaphragm and the Walls of saidcasing, a hub secured to said shaft and carrying a fan located in one compartment, and a second hub enveloping and secured to the first, and carrying a fan located in the other compartment.

3. ln combination, a fan casing, a shaft extending therethrough and-carrying a fan, a motor part mounted on said shaft, a closed motor casing enveloping said motor part, and an intermediate casing, abutting said fan casing on one side, and said motor casing on the other side, and provided with a domeshaped formation to accommodate said motor part.

4. 1n combination, a fan mounted on a shaft, a motor part also mounted on said shaft, a casing enveloping said fan, a casing enveloping said motor part, and a third cas ing, located between said first named casings, and communicating with said fan casings all of said casings being securely united so as to form a rigid structure, said intermediate casing being provided with an air inlet conduit.

5. In combination, a fan casing provided with a central opening, and a second casing adapted to seat against said fan casing and envelop said opening, said second casingv having formed integral therewith a conduit carrying a valve casing, a pair of conduits extending from said valve casing, and a valve in said valve casing adapted to control communication between said several conduits.

6. In combination, a fan casing, a motor casing, and a third casing disposed between the two, all of said casings being concentrically arranged end to end, and connected so as to form a continuous, rigid, substantially an' tight structure, said third casing being provided with a conduit for admitting air to the fan casing.

7. In combination, a shaft, a hub secured thereto, a fan carried by said hub, a second hub fitted over said first hub, a fan carried by said second hub, and means for locking said two hubs together. u

8. A compound centrifugal fan, comprising, in combination a pair of fans mounted on the same shaft, a separate compartment inclosin each fan and means for directing the disc arge tangentially from one fan to the intake of the other, the second fan being of greater power than the first.

9. A compound centrifugal fan, comprising, in combination, a pair of fans mounted on the sameshaft, a casing inclosing the fans and having a partition located between the fans, wherebyeach fan is disposed 1n a separate compartment, and means for conducting the discharge from one fan to the intake of the other, both said Afans being of thev same diameter, but the second fan being wider than the iirst.

10. The combination with a vpair of fans mounted on the same shaft, of a casing inclosing said fans and provided with a partition located between the fans, said casing being formed on each side near its periphery with an annular enlargement, in proximity to the edges oi the fans.

1].. The combination with a pair of fans, and a casing surrounding the same and provided with a partition forming two compartments, one for each fan, of a tangential outlet` extending from the periphery of one fan compartment and lying in the same plane, a conduit extending radially from this outlet to the center of the other fan compartment, and a tangential outlet or discharge port ex# tending from the periphery of the last named i fan compartment.

12. A fan casing composed of two half sections, secured together, a partition between the sections, intake openings at the center of each section, a tangential outlet extending from the periphery of one section, a conduit formed as a part of the other section and lying in the saine plane and extending radially to its intake opening, said conduit connecting at its other end with said outlet from the rst section, and a tangential discharge portv extending from the periphery of the second section.

In testimony whereof I have ailixed my A. H. KAUFMAN, R. F.;DILW0RTH.

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