US1857762A - Rotary ventilator - Google Patents

Description

Maly4 10, 1932. v. H. MEADOWS 4 ROTARY VENTILATOR Filed oct. so. 1929 HlI ' AH'orneys Patented May 10, 1932 UNITED STATES VAUGHN H. MEADOWS, Aor Los `ANnaranjas, cueLrromvrA` noTARY vEN'rILA'roeV Application mea october 30,1929. serial Np, 403,523,"v

This invention relates to heating and ven,- tilating, and has for an object the provision of an improved rotary ventilator. y

A more `detailed object is the provision of a rotary ventilator including a rotor head provided with a pluraltiy of driving blades adapted to impart rotation to the head by energy derived by air currents, and also having a plurality of draftvanes adapted to createa draft within the ventilator pipe upon the end of which the device of the present invention is mounted, by withdrawing the airor other .gases from the associated end of the ventilator pipe, 'and discharging this withdrawn air laterally from the ventilator.

Another object is the provision of a rotary ventilator as described, whichk is also pro-V vided with a deflector plate capable of cooperating with the draft blades to increase their efliciency by acting as a baffle capable of altering the direction of the air leaving the ventilator pipe, into its new direction wherein it moves substantially perpendicularly' to the direction in which it moved `while within the ventilator pipe. In this manner, the deiector plate is capable of substantiallyelim-Vv inating eddy currents which so seriously hamper the eicient operation of ventilators not Iso equipped. '30

A further object is the provision of a rotary ventilator of thepclass described, provided with anti-friction bearings interposed between the rotor head and its supporting structure; 'with the resultl that i wind and other aircurrents of very low velocity, are 1fapable of imparting rotarymovement to the ead. Y l i still further object is the provision of a` rotary ventilator as describedwhich isof an exceedingly simplenature, and which consequently, is relatively inexpensive to manu?` facture,iand yet which is capable of operat ing withpa. high degreeof efficiency in carry- .45. ing out the functions for which it was designed. Y -4 The invention. possesses other objects and advantageous features, some of which, with thoseenumerated, will be set forth in the folV lowing description of the inventions particular embodiment which is illustrated inthe 'upper face 22 of thecollar 18Vl is roundedinto m drawing` accompanying and forming a part of the specification. Y

Referring4 to the drawing: p y

The' figure is a vertical, medial, sectional view taken through a rotaryrv ventilator con- 55 structed infaccordance with the principles of the present invention. i

Speci fic ally `describing the ventilator in the most practical embodiment thereof 'of which I am at present aware,V it comprises ,a sleeve 60 6 of suitable dimensions to permit its being., attached-to the outeriend of a' ventilator pipe (not shown) in such a manner as to form a continuation thereof. The sleeve '6 may be provided with suitable beads 7 extending 65 eircumferentially thereof, and a binding ring 8v capable of "ad-ding `materially to the inherent rigidity of the sleeve 6. Upper and lower sockets 9 and 10 areposi ticned axially adjacent the upper and lower "I0 ends thereof respectively, by means ofa pluraiity of radiating .arms 11 and 12' respectively, one ,end of each arm being rigid with the inner wallcf the sleeve 6, andthe other endof each arm being rigidly' connected to one of the sockets 9 vor 10,' as'the case maybe. 1n order to'position ythe sockets 94 and 10 as far apart as' practicable, the,A arms 12`asso-Y ciated'rwith the lower socket 10, are deflected `dmv'nwards at an angle with the aXis of the 80 lselected position. Y

A collar 18 is rigidly secured upon the shaft 16 slightly above the upper socket 9 and preferably within the plane of the outer end 19 of the sleeve 6. a set screw21 or its equivalent being employed to-"rigidly clamp the collar in adjustedposition; Preferably the substantially conical configuration.

Vweight of the rotor head 26 upon the upper face 22 of the collar 18. A ferrule 31 or its equivalent, may be secured to the lower end of the tube 27 to retain the parts of thebear- I, ing 29 aga-inst inadvertent displacement during assembly of the device, or at any time that the'roto'r head 26 is lifted from its positiony upon the shaft 16. ,a

A conical top plate 36 closes'the outer end of the rotor head26, and is provided with a peripheral iange 37 whereby the top plate 36 is rigidly mounted upon the central tube 27 through the expedient of a plurality of radiating arms 38,'each of which is rigid with the inner face of the flange 37 at its outer end, and with the central tube 27 at its inner end. A plurality of driving blades 41 are secured upon the upper'face of the conical top plate 36, these blades 41 being concave upon their undersurfaces and attached to the top plate 36 in angularity therewith. The blades 41 are secured to the top plate 36 so as to extend radiallly in respect thereto, and each ris secured thereto along that edge thereof which leads during rotation of the head 26, in that direction which will cause a draft of air to be drawn upwards through the sleeve 6 and ventilator pipe upon which it is mounted. Itis apparent therefore, that the'trailing edges of the platesare elevated above the top plate 3,6; with the result that when air is in motion ypast the ventilator o-fthe present invention, it will become caught under the elevated trailing edges of the blades 41 upon one side of the head 26,' regardless of the direction in which the air is moving. The air striking they blades upon the opposite side, will merely impinge against the forward faces thereof which incline upwards away from the direction of motion of the air, with the result that less rotational energy is received from the moving air on this side, than on the side of the ventilator where the wind catches under the elevated edges. Consequent-ly, rotational movement will be imparted to the entire head 26. All the blades 41 are joined at the center of the head 26 by means of a more or less ornamental knob 42 which serves to add strength to the entire structure.

A plurality of Y draft vanes 43 extend downwards Afrom the flange 37. Each vane 43 is rigidly attached at its upper end to the flange 37, and at its lower end to a ring 44 preferably of the same diameter as the flange 37, and in alignment therewith. Each vane 43 is disposed in angularity with a radius of the head 26 drawn from the axis of rotation to that vane, theleading edge of the vane being further from the axis than the trailing edge. Furthermore, the vanes 43 are so separated that there is a material space 46 between each pair of adjacent vanes 43; with the result that as the head 26 rotates, the leading or inner edges 47 thereof will cut into the air inside the head 26, and due to the inertia of the air thus engaged, which tends to hold it against rotation with the head, this air caught by the moving vanes 43, will be impelled radially outwards until it has passed the vtrailing or outer edges 48 of the vanes 43, passing through the spaces 46 between adjacent pairs of .vanes 43. Obviously, this will create an area of low pressure inside the head 26, lwhich will be conducive to a development of draft ywithin the sleeve. 6 and` the ventila-ting pipe upon which it is mounted so as to draw air or other gases therefrom, to be discharged radially outwards from the rotating head 2.

Obviously, the vanes 43 also assist in imparting rotation to the head 26 by energy derived from air moving therepast, because air Vmoving against the vanes 43, will be caught by the outermost edges 48 of the vanes 43 upon one side of the head 26, and merelyy deflected by the inclined outer surface'of the vanes 43 upon the opposite side. Whereas the wind thus entrapped by the vanes 43, will tend to How into the head 26, and counteract to a certain extent, the production of a draft of air outwards through the sleeve 6, it should kbe remembered that the wind will engage only a relatively few of the vanes 43, i. e., only two or three of the vanes 43 which open toward the direction from which the wind is approaching, whereas all of thel vanes 43 throughout kthe entire periphery of the head 26, serve to pump the air outwards during rotation of the head.

A conical delector 51 is disposed inside the head 26, and flares upwards away from the sleeve 6. Y In other words, the ylower end 52 which is secured to the central tube 27, islower than the larger upper end 53 which is provided with a flange 54 secured rigidly inside the flange 37. This conical deiiector V51 cooperates with the vanes 43 in drawing air outwards from the sleeve 6, inasmuch asl it facilitates the deflectionk ofthe moving column of air as it changes direction. In moving through the sleeve 6, the air moves vertiacross the head 26, eddy currents would be set up which would materially interfere with the unrestricted ow of air therethrough. Consequently, it is believed readily apparent that the presence of the conical deflector 51, will assist in altering the direction of movement of the air, with a material reduction or absolute elimination of eddy currents, and thus materially increase the efiiciency ofthe entire structure.

It is to be understood that the details of the invention as herein disclosed, are subject to alteration within the spirit or scope of the appended claim.

I claim.

A rotary ventilator, comprising a shaft, means for mounting said shaft axially of a ventilator pipe and extending from an end thereof, and a rotor head comprising a sleeve journaled on said shaft, a top plate rigid with said sleeve and having a peripheral flange, a plurality of driving blades secured to said top plate and arranged radially of said rotor head and angularly with respect to said plate, a plurality of substantially vertical draft vanes rigid at their upper ends with said said flange, a ring secured to all of said vanes adjacent their lower ends, said ring being of substantially the same diameter as said plate and said vanes being substantialy straight and disposed substantially vertically, each of said vanes being disposed in angularity with a radius of said head drawn through the vane, an a conical deiiector disposed inside said head and tapering downward and inwards to said sleeve from adjacent the upper ends of said vanes.

In testimony whereof I have signed my name to this specification.

VAUGHN H. MEADOWS.

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