US1493998A - Crusher - Google Patents

Description

Patented May is, 1924.

warren STATES 1,493,998 PATENT OFFICE.

3 CHARLES S. LINCOLN, OF WAUWATOSA, WISCONSIN, ASSIGNOR. TO ALLIS-CHALMERS MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE.

CRUSEER.

Application filed August 27, 1921. Serial No. 495,974.

To all whom it may concern:

Be it known that CHARLES S. LINooLN, a citizen of the United States, residing at "Wauwatosa, in the county of Milwaukee and State of Wisconsin, has invented a certain new and useful Improvement in Crushers, of which the following is a specification.

This invention relates to crushers and lubricating systems therefor.

One of the objects of the invention is the provision of a crusher which will be more eflicient in operation than those of the same general type as hitherto constructed and operated. A more specific object of the inven tion is the provision of a lubricating system for crushers which will perform the double function of lubricating various parts thereof including parts having surfaces extending in a general horizontal direction and in which the horizontal surfaces are caused to.

automatically operate in the floating condition thus practically eliminating wear on these parts during normal operation. Other objects will appear hereinafter ,as the 'description of the invention proceeds.

The novel features of the invention will appear from this specification and the accompanying drawings forming a part thereof and showing one embodiment of said invention, and all these novel features are intended to be pointed out in the claims.

In the drawings, Fig. 1 is a vertical sectional view of a gyratory crusher and lubricating system therefor more or less diarammatically shown, parts of the crusher aving been broken away, for the sake of clearness;

Fig. 2 is a detail view in section of a part of the lubricating system.

The invention has been shown applied in a gyratory crusher including a main shaft 1 carrying. a crusher head 2 co-operating in the usual manner with concaves 3 carried by a top shell 4. The to shell 4 is in turn car- 'ried by a bottom she l 5. The bottom shell 5 is here shown as including a suitable support 6 for a bearing sleeve proper 7. This sleeve 7 forms the outer bearing for an eccentric 8 surrounding the shaft 1 whereby the latter may be gyrated. The eccentric 8 is here shown as provided with a collar 9 which rests on a bevel gear 10. rigidly associated in any desired manner with the eOCBIl-y tric. The bevel gear may-have rigidly associated therewith a wearing ring 11 which is adapted to be supported by a support 13. The support 13 may also be provided with a bearing ring 12 co-operating with the wearing ring 11.

The support 13 is here shown as forming part of a bottom plate 14 together forming an oil chamber or well 15. The bottom plate 14 is also so constructed as to form an outer annular well 16.

I The crusher shown is provided with a. main driving shaft 17 carrying a bevel pinion 18 meshing with the bevel gear 10. The shaft 17 rotates in a bearing 19.

The lubricating system of the crusher is provided with a pump 20 here shown as driven from shaft 17 by means of a pair of gears 21, 22. The pump 20 is connected to a discharge pipe 23 preferably extending upwardly to form a stand-pipe. The top of the stand-pipe may be connected directly or indirectly with an'overflow pipe 24 the lower end of which latter is here shown as passing-through an opening in the bearing housing 25. The upper level of the stand-pipe is preferably about the sameor higher than the top of the eccentric, though under some conditions it may be lower. A main discharge pipe 26, connected to pipe 23, is provide for leading the fluid discharged by pump 20 to the bottom plate and into the chamber 15. The discharge pipe 26 may have a pressure gauge 27 connected thereto. A relief valve 28 is preferably connected in series with pipes 23 and 24. An oil cup 29 for lubricating bearing 19 may be fed through a pipe 30 from pipe 23. The oil pumped by ump 20reaches the latter through suction pipe 31 connected with the well 16. A strainer 32 may be interposed in pipe 31.

While the exact form of the relief valve 28 is not material, an example of a convenient form is illustrated in Fig. .2. The valve here shown is of the poppet type including a valve element 33 forced against its seat by means of a spring 34. Engaging the other end of the spring is a washer 35 the position of which may be altered, and thus .the tension of the spring varied, by means of an adjusting'screw 36 threaded into the valve casing 37. A removable cap 38 may be provided over the adj usting screw 36.

The operation of the crusher and lubricating system is as follows:

- 7 Assuming the crusher to be in operation and the pum driven at normal speed, the latter wil pump oil through pipe 26 into chamber 15. From here the oil finds its way between the eccentric 8 and the main shaft 1 rising to the top of the eccentric where some of it passes down between the outer bearing 7-and the eccentric and another portion may overflow through a pipe 39 onto gear 10 from whence the oil drops into the well 16. From well 16 the oil enters the suction pipe 31 and passes through the pump. Inasmuch as the lower surface of the eccentric and the lower surface of the gear, specifically the surface of the wearing ring 11, are exposed to oil under pressure reaching these surfaces from chamer 15, the eccentric and gear will be lifted to a floating position, the height of lift depending on the pressure in the chamber 15 which in turn depends upon the pressure in pipe 26. The entrance of oil between the wearing ring 11 and ring 12 may be assisted by oil grooves re resentedby groove 40. It will be noted t at even though oil passes between parts 11 and 12 lifting part 11 and associated parts, only a small quantity of this oil Wlll escape on account of an upwardly extending. annular lip 41 which covers the outer peripheral side of parts 11, 12. It is, of course, evident that it is not necessary that both the eccentric and ear be acted upon by, oil under pressure, ut that either one or both may be so acted upon. It is clearly desirable that the pressure in chamber 15 be not permitted to rise so high that the collar 9 will come in contact with the lower horizontal portion of the bearing 6, 7; the pressure must be so adjusted that the means for gyrating the shaft 1 comprising the eccentric 8 and gear 10 will operate in a floating position between the axial bearing '6, 7 and the step bearin 11, 12. This result may be accom plishe by proper adjustment of the fluid pressure in pipe 26. The exact valueof this ressure may be determined by gauge 27. n order to prevent the pressure in pipe 26 from rising above a predetermined value the relief valve 28is provided. The relief valve 28 is adjusted so that if the pressure In pi e 26 rises above a predetermined desired va ue the valve element 33 will rise against the spring 34 relieving the pressure and permitting overflow of the oil into pipe 24. The exact amount oftension desired to be put upon spring 34 by adjusting screw 36 may be determined by observing the action of the gauge 27 and the desired position of thegyrating means. The pressure at the gauge will of course fall when the relief valve operates.

The relief valve 28 may be placed anywhere in the pipe connection 23, 24. Even if the valve 28 should accidentally remain open, for example, foreign material vides emergency lubrication under such conditions even though, depending on the height of the stand-pipe and other factors, the oil pressure might not be enough to raise the gyrating means to a floating position. It is moreover clear that, if desired and if feasible in given instances, the stand-pipe may be made of such a height that no relief valve at all is necessary, any excess of pressure being taken care of by simple overflow from the standipe.

The word .oil has been used in'the specification and claims for the sake of brevity, but it is clear-that any suitable fluid'may be used.

It should be understood that it is not desired to limit the invention to the exact details of construction shown and described,

for obvious modifications will occur to a chamber to thereby lift said wearing surv face off of its support, and a relief valve connected to the discharge side of said pump.

2. In combination with a vertical crusher shaft, an eccentric therefor, a bearing for said eccentric, and means whereby said gear and eccentric are caused to be lifted a predetermined maximum amount by oil pressure so that said ear and eccentric win float on oil during t e operation thereof.

3. In combination with a vertical crusher shaft, an eccentric therefor, a bearing for said eccentric, and means whereby fluid pressure is applied to lift said gear and eccentric, and means for preventing said fluid pressure from. exceeding a predeterminedamount.

4. In combination with a vertical crusher shaft an eccentric therefor, a bearing for said eccentric, a gear for driving said eccentric, a support on which said eccentric and gear may rest, said eccentric and gear being oscillatable between said su port and bearmg, and means for applying fluid pressure -to lift said gear and eccentric to a axial bearing and a step bearing for said gyrating means, and means for applying fluid .pressure to said gyrating means to lift the same and cause it to float between said bearings.

6. In combination with a vertical crusher shaft, means for. gyrating said shaft, an axial bearing and a step bearing for said gyrating means, means for applying fluid under pressure to said step bearing thereby to lift said gyrating means, and means for preventing said gyrating means from being lifted into contact with the lower horizontal portion of said axial bearin 7. In 'combinationwith a vertical crusher shaft, an eccentric therefor, a bearing for said eccentric, a pump for supplying lubricating oil to said shaft, eccentric and hearing, and for causing said eccentric to float on oil, and a stand-pipe connected with the discharge side of said pump, said standpipe being higher than the top of said eccentric.

8. In combination with a vertical crusher shaft, an eccentric therefor, a bearing for said eccentric, a pump for supplying lubricating oilto said shaft, eccentric and bearing, and for causing said eccentric to floaton oil, a stand-pipe connected with the discharge side of said pump, said stand-pipe being at'least as high as thetop of said eccentric, and a relief valve in said standpipe.

9. In combination with a vertical crusher shaft, an eccentric therefor, a bearing for said eccentric, a pump for supplying lubricating'oil to said shaft, eccentric and hearing, and for causing said eccentric to float on oil, a stand-pipe connected with the discharge side of said pump, said stand-pipe being higher than the top of said eccentric, and means for returning the overflow from said stand-pipe to the suction side of said pump. t

10. In combination with a vertical crusher shaft, an eccentric therefor, a bearing for said eccentric, a pump for supplying lubricating oil to said shaft, eccentric and hearing, and for causing said eccentric to float on oil, a stand-pipe connected with the dis charge side of said pump, said stand-pipe being at least as high as the top of said eccentric, means for returning the overflow from said stand-pipe to the suction side of said pump, and a relief valve in said standpipe,

11. In combination with a vertical crusher shaft, means for gyrating said shaft, an axial bearing and a step bearing for said gyrating means, said gyrating means being oscillatable between said bearings, and means for applying fluid pressure to said gyrating means to lift and automatically maintain the same in a floating position between said bearings.

12. In combination with a vertical crusher shaft, means for gyrating said shaft, an axial bearing and a step bearing for said gyrating means, said gyrating means being oscillatable between said bearings, and a fluid supply system for said bearings including a stand-pipe for putting said bearings under fluid pressure.

13. In combination with a vertical crusher shaft, means for gyrating said shaft, an axial bearing and a step bearing for said yrating means, said gyrating means being oscillatable between said bearings, a fluid supply system for said bearings, including a pump and means for causing said gyrating means to operate at no higher than a predetermined floating position between said bearings, and means for preventing the pressure in said system from falling below -a' predetermined minimum during normal operation of said pump.

14. In combination with a crusher having gyrating means, a fluid supply system for said gyrating means including a pump, a connection to the discharge side of said pump comprising a stand-pipe and discharge meanstherefor to the suction side of said pump, and a connection from the discharge side of said pump to said gyrating means.

15. In combination with a crusher having gyrating means, a fluid supply system for said gyrating means including a pump, a connection to the discharge side of said pump comprising a stand-pipe and discharge means therefor to the suction side of said pump, a connection from the discharge side of said pump to said gyrating means, and a relief valve in said first named connection.

In testimony whereof, the signature of the inventor is afiixed hereto.

CHARLES s. LiNooLu.

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