US1476137A - Fan structure for air-cooled motors - Google Patents

Description

Y Dec. 4, 1923. 1,47 ,137 J. BI LAN FAN STRUCTURE FOR AIRCOOLED MOTORS Filed May 24, 1925 FIG. 2. FIG. 3. FIG. 5.

Patented Dec. 4, 1923.

UNITED STATES.

JOHN BILAN, OF FLINT, MICHIGAN.

FAN STRUCTURE FOR AIB-COOLED MOTORS.

Applieation filed May 24, 1923.

To all whom it may concern:

Be it known that 1, JOHN BILAN, a citizen of Ukraine, residing at Flint, in the county of Genesee and State of Michigan,

have invented certain new and useful Improvements in Fan Structures for Air-'- Cooled Motors, of which the following is a specification.

This invention relates to certain new and useful improvements in fan structures for air cooled motors wherein a current of air is forced through an air chamber formed in the motor casing for the purpose of cooling the motor by air instead of the usual water circulating system.

The primary object of the invention is to provide a fan structure for air cooled. m0- tors wherein a casing having a fan revolubly mounted therein, has a conduit con nection with an air chamber associated with a motor to create a circulation of air through the motor for the purpose of cooling the same.

With the above and other objects in view as the nature of the invention is better understood, the same consists of the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawing and 80 claimed.

In the accompanying drawing, wherein like reference characters designate corresponding parts throughout the several views,

Figure 1 is a longitudinal sectional view of a fan structure for air cooled motors constructed in accordance with the present invention showing the conduit connection between the fan structure and the motor,

Figure 2 is a rear elevational View of the 4 supporting arm for the forward end of the fan structure,

Figure 3 is a side elevational view of the supporting arm shown in Fig. 2,

Figure 4;- is a cross sectional view taken on line lVlV of Fig. 1 showing the closed inner end of the casing for the fan and the lug carried thereby for attaching the inner end .of the fan structure casing to the motor,

Figure 5 is a side elevational view of the 58 shaft for supporting the rotatable fan,

Figure 6 is a front end elevational view of the fan structure,

Figure 7 is a rear end elevational view of the fan structure,

Serial No. 641,193.

Figure 8 is a perspective view of the fan structure showing the relatively short and long fan blades,

Figures 9 and-'10 show side elevational views of the large and small fan blades, and

Figure 11 is a side elevational view of the anchoring bolt for supporting the outer end of the fan structure upon the motor.

Referring more in detail to the accompanying drawing, the fan structure embodies a casing having a cylindrical wall 1 and an inset bottom wall 2 surrounded by a depressed channel 3 inwardly of the side wall l as clearly shown in Figs. 1 and t, the forward open end of the casing having an inwardly directed angular shoulder 4 with spider bars 5 extending across the 0 on end of the casing as" shown in Fig. 1. i he channel portion 3 of the casing is broken and separated by an intervening portion 2 0f the bottom wall 2 while one end of the channel portion 3 has a conduitfi formed integral with the casing and extending'to an air chamber in the motor 7 illustrated .by dotted lines in Fig. 1.

The support for the closed end of the casing includes diametrically opposite apertured lugs 8 carried by the side wall 1 adjacent the channel 3 through which fastening members, such as screw bolts, pass to be se-' cured in the motor 7.

A frame structure encloses the casing and traverses the open forward end thereof, a forwardly positioned bracket comprising abutting plates 9 and 10 with the plate 10 offset as at 10 having mounting rods 11 threaded at opposite ends as at 12 passing through registering openings 13 in opposite ends of the bracket plates 9 and 10 for the reception of lock nuts, while the opposite ends of the bars 12 are secured in the motor 7.

The shaft 14 is journaled at one of its ends in the opening 15 in the bottom wall 2 of the casing with the other end thereof rotatably extending through openings 16 in the bracket plates 9 and 10, a pulleyl? being keyed to the shaft ,14 intermediate the bracket plates 9 and 10 between the ends thereof as shown in Figs. 1 and 3.

The fan includes a. conical drum 18 that is keyed to the shaft 1 1- within the casing, the conical drum 18 carrying relatively small and large fan blades 19 and 20 respectively with the forward edges-of the larger blades 20 having angular cutaway corner edges 20 to accommodate the angular shoulder 4: upon the forward end of the casing wall 1.

From the above detail description of the device, it is believed that the construction and operation thereof will at once be apparent, it being noted that the rear end of the casing is supported by the lateral lugs 8 upon'the motor 7 while the forward end thereof is supported by the spider bars 5 through which the rotatable shaft 14: extends, a belt passing over the pulley 17 to rotate the shaft 14: and fan wheel as shown in Figs. 1 and 8 carried thereby. Air is drawn in through the open front end of the casing and driven toward the rear closed end thereof, filling the chamber 3 and traveling therein to the outlet conduit 6 for delivery to the air chamber in the motor 7 for circulating air through the latter'to cool the motor, the angular shoulders upon the casing cooperating with the fan structure to hold the latter in proper position within the casing and upon the shaft 14:. The outer end of the shaft 14 with the bracket plates 9 and 10 are supported by the bars 11 to present a rigid structure supporting the fan mechanism.

While there is herein shown and described the preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

-What isclaimed as new is 1. In a fan structure for air cooled motors a casing secured to the motor, a bracket traversing the forward end of the casing, supporting bars for the bracket secured to the motor, a shaft journaled in the bracket and casing, a fan secured to the shaft within the casing, a discharge conduit extending from the casing, said bracket comprising a pair of bars with one of the bars odiset intermediate the ends and a belt pulley secured to the shaft intermediate the bracket bars.

2. In a fan structure for air cooled motors, a casing secured to the motor, a bracket traversing the forward end of the casing, supporting-bars for the bracket secured to the motor, a shaft journaled in the bracket and casing, a fan secured to the shaft within the casing, a discharge conduit extending from the casing, said bracket comprising a pair of bars with one of the bars offset intermediate the ends, a belt pulley secured to the shaft intermediate the bracket bars, said casing being open at its forward end and a circular channel formed in the closed .inner end of the casing separated by a portion of the inner end wall with the conduit connected to one end of the channel. v

3. Ina fan structure for air cooled motors, a casing secured to the motor, a bracket traversing the forward end of the casing, supporting bars for the bracket secured to the motor, a shaft journaled in the bracket and easing, a fan secured to the shaft within the casing, a discharge conduit extending from the casing, said bracket comprising a pair of bars with one of the bars offset intermediate the ends, a belt pulley secured to the shaft intermediate the bracket bars, said casing being open at its forward end, a circular channel formed in the closed inner end of the casing separated by a portion of the inner end wall with the conduit connected to one end of the channel, said fan including a. conical drum secured to the shaft, fan blades carried by the drum, the forward outer corner edges of alternate blades havill ing angle notches therein and the outer peripheral edge of the casing having an in wardly directed angular shoulder extending into the blade notches.

In testimony whereof I affix my signature.

JOHN lBlLAN.

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