US2737289A - Annulus vibratory feeder - Google Patents

Description

March 6, 1956 w. F. PETERS ANNULUS VIBRATORY FEEDER F'led Sept. 1'7, 1955 @w 6 4 n @1. J4

5 3 ,L m 2 L 0 J Z J Uited ANNULUS VIBRATORY FEEDER William F. Peters, Indiana, Pa., assignor to Syntron Company, Homer City, Pa., a corporationvcf Delaware This invention relates generally to feeders and more particularly to vibratory feeders for delivering a uniform amount of material in an annulus.

This invention may be employed too for supplying material to a conical or gyratory crusher wherein a uniform amount of material must be delivered annually around the periphery `of the `crusher so that the rotary Crusher member is supplied with the same amount of material on all sides and will not have any tendency to overload one section and ruin the bearing.

Uniform feeding in an annulus can be accomplished by the use of two or more straight feeders having the front edges of the bottom of their troughs in an arcuate form providing a portion of the annular periphery to be fed, there being a sucient number of feeder troughs to complete the periphery with their edges in spaced relation. This may be accomplished by two or more feeder troughs. If only two troughs are employed the troughs are wider than the annular area being fed. The shaped ends of the troughs are spaced sufficiently to prevent them from striking one another but their shaped front edges complete the annulus with the side edges of the troughs, spaced from the formed periphery in the trough bottoms to allow the material to flow thereto from all sides.

The feeders may be mounted so that the longitudinal axes of their troughs lie radially or tangentially, or any angle therebetween of the crusher throat to which they are feeding. The troughs may lie in a horizontal plane or they may slope up or down. The sectors in the ends of the troughs which form the annulus may be arcuate requiring all the troughs to complete the circle or they may be straight, each forming a chord about the annulus which is suliiciently large that the number of feeders required make it unnecessary to arcuately shape their ends to accomplish the uniform annular feed.

These conveyor troughs may be fed from chutes which lead from larger sources of supply such as bins or hoppers. These chutes are provided with adjustable gates to regulate the ow of material to the conveyor troughs. If the material is stored in one or more large hoppers above the crusher, one chute can be used to supply each conveyor trough. When the gates from each chute and the operation of each feeder are made to ow the material uniformly, then a constant annular supply is fed to the annulus of the Crusher or grinder or other mechanism requiring a similar annular feed.

Other objects and advantages appear hereinafter in the following description and claims.

The accompanying drawing shows for the purpose of exemplication without limiting the invention or claims thereto certain practical embodiments illustrating the principles of the invention wherein:

Fig. l is a View in vertical section of a dual feeder arrangement to supply a uniform amount of material in an annulus.

Fig. 2 is a plan view of the dual feeder troughs.

Referring to the drawing, the crusher 1 is of the cone tetes Patent ICC . 2 type having a rotary shaft 2 on which the cone 3 is mounted. The upper end of the shaft extends out of the crusher and carries the distributing disk 4 which coopcrates with the inverted conical mouth 5 to limit the charge -fed to the grinding throat, 6, formed between the Crusher cone 3 and the annular crushing wall 7. lThe wall 7 is mounted on the annular mill housing 8 and is enclosed by the casing 9. The mill housing 8`has the bearing 10 mounted therein to receive the shaft A11, Vthe outer end of which is coupled to the rotary motor 12 and the inner end has securedthereto the beveled pinion 13 which meshes with and drives thebeveled gear 14 secured to the shaft 2. Suitable lubricated `bearings are provided to support-the shaft 2 and the beveled driving gears are encased as indicated at 15 to `keep the dust and material particles from the gears.

A deck 16 is provided around the crusher to support the vibratory feeders which in this instance are electromagnetic vibratory feeders of which there are two in number as indicated at 17 and 18. Each feeder isprovided with an electromagnetic motor mounted within the motor bases 20 and coupled to the trough connecting members 21, each of which is provided with the trough members 22 and 23. The motor Ybases and trough con.- necting members are mounted on the deck 16 by the resilient supports 24 and y25.

The discharge end .of each feeder trough 22 and 23 has a lsemicircular redge 2.6 which -is concentric to `the axis of the shaft 2 and terminates on the sides of the feeder trough in spaced relation with each other as indicated at 27. Each trough has a side and back wall 2S whichare also spaced from each other.

The inverted conical mouth 5 is larger in diameter than the annular opening formed by the arcuate edges 26 which form the complete annulus whether they are constructed from two or more feeders and any dribble that leaks out through the clearance between the feeders is caught by the conical mouth 5.

The feeders are supplied with material from the hopper 30 which is provided with a chute for each feeder as indicated at 31 and 32. The mouths at the lower ends of the chutes are closely spaced with the bottom of the conveyor troughs and a portion of the chutes are open as indicated at 33. These openings are controlled by the gates 34 which are adjustable automatically, but the actuating mechanism is not shown. Thus the amount of material fed from the hopper through the chutes to the feeders may be controlled by the gate and the speed of the feeder in removing the material from the bottom of the chute. The amplitude of the feeder in operation controls the amount of ow and this may be regulated by varying the voltage supplied to the electromagnetic feeder motor. Regardless of how fast or slow the feeders supply the material it is fed uniformly around an annulus or other configuration formed by the front edge 26.

The control of the amplitude of the motor means of each feeder 17 and 18 is by means of a voltage control means as illustrated in Fig. 1 wherein the electromagnetic field members 35 and 36 are mounted in the motor bases 20. One side 0f each field member is connected by the line 37 to one side of the two-pole alternating current supply switch 38. The other side of the electromagnetic eld member 35 is connected through the line 40, the variable resistance 41, the line 42, the halfwave disc rectifier 43, to'line 44. The other side of the electromagnetic member 36 is connected through line 45, variable resistance 46, line 47, and halfwave rectifier 48, to line 44. Line 44 is connected through the master variable resistance and line 51 to the other side of the twopole alternating current supply switch 38. The individual resistance controls 41 and 46 may be used to set or match each feeder 17 and 18 to operate at the same rate e; of feed after which the master control resistance 50 is employed as the voltage control means to vary the voltage and change the amplitude of both motors and thus control the uniform ow of both feeders at different rates of feed.

It is to be understood that the invention disclosed herein is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings since the invention is capable of other embodiments and of being practiced or carried out in various ways.

I claim:

1. A device forfeeding material uniformly around an annular path comprising a plurality of independent feeder troughs symmetrically disposed about a central point to separately feed and discharge their contents in the direction of said point, means defining an arcuate edge at the discharge end of each trough, said troughs being uniformly positioned relative to each other around said point, and motor means for each feeder trough to effect a vibratory reciprocation and impart a positive conveying action to feed the material uniformly so that it Will be discharged uniformly around the arcuate edge of each trough.

2. A device for feeding material around an annular path comprising an annular throat, a plurality of independent feeders having their troughs symmetrically disposed to separately feed and discharge material to said throat, means defining an arcuate edge at the discharge end of each trough, said arcuate edges mating with each other in close spaced relation to make up a complete i annulus, and motor means for each feeder trough to effect a vibratory reciprocation and impart a positive conveying action to simultaneously feed the material uniformly so that it will be discharged uniformly around the arcuate edge of each trough in an annular path into said throat.

3. The structure of claim 2 characterized in that said complete annulus is circular.

4. A device for feeding material to a crusher which comprises an annular throat on said Crusher to receive material, a series of independent feeders having their troughs symmetrically disposed to separately feed and discharge material to said throat, means defining an arcuate edge at the discharge end of each trough which mate with each other in close spaced relation to form an annulus, motor means for each feeder trough to efect a vibratory reciprocation and impart a positive conveying action to simultaneously feed the material so that it will be discharged uniformly around the arcuate edge of each trough, and voltage control means for each motor to produce a uniform ow of material from each trough into said annular path to the Crusher throat.

References Cited in the file of this patent UNITED STATES PATENTS 369,117 Marchant Aug. 30, 1887 2,661,830 Total Dec. 8, 1953 FOREIGN PATENTS 13,732 Switzerland Feb. 5, 1897

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