US2690294A - Blower - Google Patents

Description

Sept. 28, 1954 B. B. CARY 2,690,294

BLOWER Filed June 2, 1949 3 Sheets-Sheet l l4 EIEEEHEF? E]- CARY @mfw ATTORNEYS Sept. 28, 1954 CARY 2,690,294

BLOWER Filed June 2, 1949 3 Sheets-Sheet 2 ATTORNEYS EIEEEl-IER EL CARY Sept. 28, 1954 B CARY 2,690,294

BLOWER Filed June 2, 1949 s Shets-Sheet s FIE YU l\ i 34- 42 DIPECT/QN OF H v AIR F -Q {fin :34. 42

v H J| EEECHEFRJ .E'LFARY as? W2 v ATTORNEYS Patented Sept. 28, 1954 BLOWER Beecher B. Cary, Jackson, Mieh., assignor to Hayes Industries, Jackson, Mich, a corporation of Michigan Application June 2, 1949, Serial No. 96,713

1 Claim. 1

This invention relates to axial flow blowers as employed on automobiles for heating or ventilating purposes and which incorporate a motor and vane assembly mounted within an air flow casing.

It is an object of the invention to provide blower apparatus of the above described character which is of compact construction and can be readily manufactured and assembled.

It is another object of the invention to provide a blower apparatus which is capable of being manufactured from sheet metal and provides for the mounting of the motor and air fiow vane assemblies in a novel, simple, yet highly efiicient and practical manner.

Yet another object of the invention is to provide a blower apparatus embodying fixed and rotary axial flow vane assemblies which provide for the obtaining of an idling, or non-rotary condition, in which an axial air flow is free to take place through the casing interior and the vane assemblies mounted therein, the latter including a fixed circular series of vanes and a rotary vane series mounted in axial adjacent relationship to said fixed vane series.

These and other objects and advantages residing in the combination, construction and arrangement of parts will be more apparent from a consideration of the following description with reference to the drawing and the annexed claim.

In the drawings:

Fig. I is a side elevational view of one form of the invention,

Fig. II is a longitudinal section of Fig. I,

Fig. III is a section on the line IIIIII of Fig. I,

Fig. IV is a side elevational view of a modified form of the invention,

Fig. V is a longitudinal section of Fig. IV,

Fig. VI is a section on the line VIVI of Fig. V,

Fig. VII is a perspective View of the motor housing and combined guide vane and mounting structure employed in the previously described figures and forming an important part of this invention,

Fig. VIII is a perspective view of one of the fixed guide vanes of the said mounting structure, and

Fig. IX is a diagrammatic plan view showing the assembled fixed end casings and the central rotor casing with an adjacent pair of vanes therein and the general relative angular and curved shapes which they assume and present to the axial flow of air.

Referring to the drawings, and first to Figs.

I, II and III, the blower construction illustrated therein comprises an outer tubular casing indicated generally at 10, which is conveniently formed from sheet metal formed into shape and jointed in any convenient manner, as by turning over and rolling, as indicated at [2 in Fig. I11, said casing being shown fitted with exterior lugs M, by which the blower is capable of being mounted as a unit upon a suitable part of a motor vehicle body or framework but which mounting means may take other forms and constructions to suit particular requirements and conditions.

The outer casing I9 forms an air flow duct, with the air flow taking place in the direction of the arrow A seen in Fig. I, and accommodates in co-axial alignment a fixed motor casing, a rotor and an end casing indicated generally at l4, l5 and 18 respectively, all of which are concentrically mounted with respect to the outer casing and define an annular air flow space 29 along which the air flow is constrained to take place by the action of the rotor (6, when in rotation, or which air flow can take place freely by a natural draft or suction effect due to the particular formation and arrangement of the fixed and rotary vane assemblies, described later.

Both the motor casing Hi and the end casing l8 are of identical form and are shown as provided with dome-shaped nose ends 22, 22' which, with the cylindrical walls 24, 24' and the central cylindrical rotor casing wall 26, combine to form a stream-lined inner casing assembly. Also, both the motor casing it and the end casing iii, are fitted with external vane assemblies each of similar construction and composed of a circumferentially spaced series of vane elements, indicated generally at 28. The construction thereby involved is seen also in Figs. VII and VIII, where the casing part is taken to be the motor casing l4, although the end casing I8 is of identical construction but has no motor housed therein, the casing l4 being shown in Figs. I and II as fitted with an electric motor 30 having a central shaft 32 upon which the rotor it is mounted for its rotation by this motor.

Referring now to the construction of the easing i4 and its vane assembly, it will be seen particularly from Fig. VH and VIII, that the vane elements 23 are of identical construction and form and that each comprises a pair of vanes 34, 34 joined by an integral bridge 36 and having lugs 33 by which the vane elements are mounted as units upon the exterior surface of the casing part, each such unit being constituted by a said pair of vanes 34, 34 and bridge connection 36 and the vanes being assembled to extend generally in the direction of the longitudinal axis of the casing so as to provide for the obtaining of the desired axial air flow characteristic. The lugs 48 are passed through suitable slots in the casing M (or l8) and are turned overon the interior thereof to provide for the secure mounting of these vane elements upon the casing.

It will be appreciated that the casing M can be pressed or stamped out from sheet metal and that the vane elements themselves can also be formed from sheet metal suitably cut and formed into shape, thereby making for ease and relative cheapness of construction.

Each bridge piece is positioned to lie adjacent the interior surface of the outer casing ii! and is shaped into arcuate form to conform with such surface, the construction being such that the circumferential assembly of arcuate bridge pieces combine to form a guide surface by which the casing and its vanes is capable of being slid endwise as a unit into the casing l and positioned for the engagement of screws 42 inserted through openings in the casing it and engaged in the said openings All to fixedly secure and locate the unit in operative position.

The vane surfaces 3 5, 34' are of similar shape and formation and are formed to present curved ends 52 which are directed in the same direction upon their casing parts H3 or 18, such as appears clear from. consideration of the diagrammatic plan view of Fig. IX, which shows an adjacent pair of these vanes on the fixed casing part It and 48 in operative relation to an adjacent pair of rotor vanes 44. The latter are all of identical form and construction and are also conveniently alfixed in position upon the cylindrical casing part l5 of the rotor 15. by turned over lugs 45 (Fig. II).

The motor as is shown mounted within the one end casing part 22 by screw bolts 48. pro- J'ecting from the motor casing and engaged in openings in depressions 5c in, the domed casing end 22, in which depression nuts 52 are accommodated to secure the screw bolts, and hence the motor, in position and one of which nuts serves to secure an electrical terminal 54 on an electrical lead 56 of a ground wire assembly, the electrical supply being conveyed by another electrical lead, 58- connected with the motor and extending throu h a grommet fitting. to. in an opening in the outer casing It, this lead 58 being adapted for connection to the. vehicle headilight terminal blocks (not shown) for example. 7 The motor shaft 32 conveniently terminates within the end casing [8, as shown, and has the rotor it mounted thereon for free rotation between the fixed vane assemblies. 34, 34 at each end thereof. Such mounting is shown as accomplished by the; casing part i5 having an an nular radial end web 62 supporting a bearing socket 64 in which the motor shaft end is secured, as by a grub screw 66.

The entire blower construction provides for relative ease and cheapness of construction as well as for ease of assembly. To assemble the parts. it is merely necessary to slide the end casing IB axially alongthe interior of the outer casing Iii until the bridge openings 40 of the vane elements on this casing. are positioned for the reception of the securing screws 42.. Then with the motor 30 secured upon the other end casing M, by the screw bolts 48 and nuts 52, and the rotor 16 also secured upon the motor shaft 32 it is possible to slide these parts as a unit along the interior of the casing ID to position the other bridge openings 40 for the reception of the securing screws 62. This completes the formation of the required blower assembly, with the end fixed vanes 34, 34' and the central rotor vanes 64 defining axial air flow channels of the shape and direction shown in Fig. IX and which provide for such an axial air flow when the rotor is in operation or is idle. Thus the motor can be employed to deliver hot air along the interior of the casing In by rotation of the rotor, or with the motor and rotor idle the casing can be relied upon to supply cool or ventilating air by natural draft or suction when the vehicle, to which the blower is affixed, is in motion.

Referring now to Figs. IV, V and VI, here the blower has only one end casing with fixed guide vanes in association with a rotor; otherwise the construction and assembly is the same as with the previously described form of the invention. In Figs. IV, V and VI the blower is shown as constituted by an outer tube casing l0 bent out from sheet metal joined by folding at I2 and enclosing the fixed vane structure 14' and the rotor H5.

The fixed vane structure is constituted by the hollow cylindrical casing 24' with the closed domed end 22 and carrying the fixed vane elements 28 each of which is of substantially in verted U-form and presents adjacent spaced vanes 68, 68" and an arcuate bridge connection 70 adapted to have guided sliding engagement with. the. interior surface of the tube casing Hi, all as above. described, the vane elements 28' being conveniently bent out from a single piece of sheet metal and including the deformable securing lugs 38. The electric motor is indicated at 30 and: is shown secured in the casing 22, 24 by the screw bolts 48' and nuts 52' with its shaft 32 having the rotor mounted thereon, the latter being formed by the cylindrical casing [2 having the axially directed blades 44' secured thereon by the turned over lugs 46.

The terminal block electric supply lead is indicated at 58 and the ground lead at 56.

Having thus described my invention in two practical forms but without limitation to the precise details thereof, what I claim as novel and wish to secure by Letters Patent is as follows:

An axial flow blower construction comprising in combination. an outer tubular casing having openings therethrough at circumferentially spaced intervals for receiving securing means, a first hollow casing part having a closed dome shaped end and an open-ended cylindrical portion, said first hollow casing having an electric motor secured'therein with a power shaft ex tending beyond the. open end of the casing, a second hollow casing part, said second casing part being of cylindrical shape, means mounting said second casing upon said power shaft to be co-axial therewith and with said first casing part, with the said second and cylindrical casing part forming an extension of the cylindrical portion of said first casing part, both said casing parts being concentric with the outer tubular casing, and means mounting said casing parts as a unit within said tubular casing part, said latter means comprising a series of similar sheet metal parts of substantially U- shape section mounted about the exterior sur face of said first casing part in circumferentially spaced relation, each of said sheet metal parts having axially extending curved walls joined by an integral bridge portion with an opening therethrough registrable with the openings in said outer tubular casing, the bridge portions of said sheet metal parts lying upon a common cylindrical surface corresponding with the interior surface of said outer tubular casing, said unit having axial sliding engagement with the said tubular casing surface by the engagement of said bridge portions with said surface, said second casing part carrying separate axially eX- tending vane elements with curved surfaces forming axial extensions of the curved Walls of said sheet metal parts but of difierent curvature thereto, said separate vane elements having clearance with respect to the inner surface of said outer tubular casing.

References Cited in the file of this patent Number UNITED STATES PATENTS Name Date Morin -1 Feb. 11, 1930 Jones May 8, 1934 Albertson Oct. 19, 1937 Replogle Oct. 10, 1939 Jewell July 2, 1940 Troller Sept. 1, 1942 McElroy Oct. 13, 1942 Hagen Jan. 19, 1943 Ponomareff Jan. 29, 1946 Troller Mar. 26, 1946 Parrish Apr. 9, 1946 Reinmann Jan. 4, 1949 McElroy Jan. 17, 1950 Curley Mar. 28, 1950 Sawyer Apr. 8, 1952 Anxionnaz et a1. Oct. 14, 1952

Images