US1819290A - Sugar mill - Google Patents

Description

F. HEGENBARTH SUGAR MILL Filed Aug.

Aug. 18, 1931.

Patented Aug. 18, 1931 UNITED STATES PATENT OFFICE FRANCIS HEGENBARTH, OF NEW ORLEANS, LOUISIANA, ASSIGNOR T0 FULTON IRON `WORKS COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION 0F DELAWARE SUGAR MILL Application led August 14, 1929. Serial No. 385,864.V

This invention relates generally to sugar millsv and more specifically to im roved means for applying pressure to the oating rolls of such apparatus, the predominant object of the. invention being to provide sugar mills with means whereby the hydraulic pressure per square inch, which is applied tothe top roll of a sugar mill at one side thereof,

- is greater than is the hydraulic pressure applied to said top roll at the opposite side of the mill.

In the operation of sugar mills having driving pinions or crown wheels at one. side only of the mills, there is a tendency for the hydraulically loaded floating top rolls of the mills to rise more on the side of the mills at which the crown wheels arelocated than at the opposite side thereof. The purpose of the present invention is to remedy this situation and I accomplish this purpose by applying greater hydraulic pressure per square inch to the floating top rolls at the crown wheel ysides of said rolls than at the opposite sides lthereof. Heretofore it has been proposed to accomplish this purpose by employing hydraulic rams at the o-pposite sides of the floating rolls which are of different areas, whereby theI pressure exerted against the rolls at opposite sides thereof will dil'er even though the pressure per square inch of the pressure exerting medium acting against the oppositely disposed rams is the same.

While this system functioned with some eiliciency it had several disadvantages which are eliminated in the use of the present invention which briefly stated comprises utilizing a single accumulator for distributing two different hydraulic pressures to the floating top roll of a sugar mill. The two pressures referred to are obtained through the use of my improved differential hydraulic ram, and this differential hydraulic ram is so constructed that parts thereof may be conveniently replaced with corresponding parts of different dimensions for the purpose of varying the pressures distributed by said differential hydraulic ram.

Figure 1 is a vertical section of a sugar purpose of illustration, merely, one embodi-V ment of the invention A designates a sugar mill which comprises the usual bottoni rolls B (only one of which is shown) and the usual floating top roll C. The rolls B and C are supported for rotary movement by the mill housing or rame'D, the neck portions of said rolls being supported in suitable bearings. E designates the meshing driving pinions, or crown wheels as they are called, said crown wheels being fixed to neck portions of the rolls in the usual manner and being located at one side only of the mill A.

Located above the neck portions of the top floating roll C of the mill A at opposite ends of said top roll are top caps F and G, the top cap at the crown wheel side of the mill being designated by the reference character F and the top cap at the opposite side of the mill being designated by the reference character G. The top caps F and G are provided with ram cylinders F and G respectively into which rams H and J are extended, said rams being provided at their lower ends with plates H and J which contact with the neck portions of the top roll C.

K designates an accumulator of ordinary construction which includes a cylinder L from which a pipe 1 leads to the top cap F. 2 des,- ignates a pipe which is connected to t-he pipe 1 as shown in Figure 2, said pipe 2 leading from said pipe 1 to the upper end of my improved differential hydraulic ram R. The differential hydraulic ram R of my improved apparatus comprises an upper cylinder 3 and nder 4 is provided with a similar annular Ilange 4', these flanges being arranged in contact with the plates 5 and 6 respectively and fastening devices 9 being extended throu ja the plates and into the annular flanges ot the cylinders for the purpose ol securing the cylinders 3 and 4 to the plates 5 and G. rThe lower cylinder 4 et the differential hydraulic ram R is of larger diameter than the cylinder 3 of said hydraulic ram and the significance of this difference of diameters of said cylinw 1ers will be subsequently pointed out herein.

Disposed within the upper cylinder 3 ot the. differential hydraulic ram R is a ram l() and arranged within the lower cylinder 4 of said hydraulic ram 4 is a ram 11. The rams l0 and 11 fit closely within their respective cylinders and because the'lower cylinder 4 is ot' greater diameter than the upper cylinder 3 the ram 11 is of correspondingly greater diameter than the ram 10. The upper end of the upper cylinder 3 and the lower end of the cylinder 4 are closed as shown in Figure 2 and spaces 12 and 13 respectively are provided between the upper end of the ram 10 and the top wall of the upper cylinder 3 and between the lower end of the ram 11 and the bottom wall of the lower cylinder 4. Attheir inner ends the rams 10 and 11 contact with each other, the ram 10 being provided with a rounded lower end 14 which rests in a correspondingly shaped seat 15 formed in the top tace of the ram 11. This arrangement provides for proper Contact between the rams l0 and 1l even though one or the other tl not gets slightly out of alinement with resi i the associated ram. The cylinders and 4 'it the differential hydraulic ram ld. are provided each with a packing gland 16 of ordinary construction which serve to compress the packing material 17 and in this manner prevent leakage of fluid from the cylinders through the space between the outer faces ot the rams and the inner faces of the cylinders.

As already stated the pipe 2f leads from the pipe 1 to the upper end of the upper cylinder 3 of the differential hydraulic rain il, there being a valve 18 in said pipe 2 which may be employed to control passage fluid therethrough. 19 designates a pipe which communicates with the interior of the lower cylinder 4 or the dillierential hydraulic ram ld said pipe 19leading f om said cylinder 4 to the ram cylinder G w n the top cap C: Ere tended from the pipe 2 to pipe is a Short section ott pipe 2G, said section of pipe is connected to said p is likewise provided i.. located above the po 20 is connecte-r1 designate dr c l from the cylinder differential hydraulic ram R, said drain pipes being provided with valves 26 for controlling passage ot fluid through said pipes.

ln the operation of a sugar mill equipped with my improved apparatus hydraulic pressure is first bulit up in the accumulator K by means of the commonly used hydraulic pump, this being done with the Valve 18 in an open position. The Valve 18 is then closed and the low pressure line consisting of the rain cylinder G inthe top cap G, pip'e 19, and space 13 beneath the ram 11 in the lower cylinder 4 of the dill'erential hydraulic ram is filled with fluid under pressure by opening the valves Q1. 22, and 23. At this time the pressure in all ot' the piping and in the space 1Q and 13 within the upper and lower cylinders 3 and 4 ot` the differential hydraulic ram R is the same, 'for instance, 4,500 lbs. per square inch, as delivered from the accumulator cylinder L. Due to the larger area of the bottom face of the ram 11 this pressure will force the ram 11 and the ram 10 upwardly to a predetermined point and upon such point being reached the Valve 21 will be moved to a closed position. In this manner there will be created a high pressure line which includes the pipes 1 and Q, and an independent low pressure line which includes the pipe 19. During operation ot the sugar mill, the low pressure mill ram .l will rise and the fluid' from the rz :n cylinder G in the top cap G will 1oe forced through the piping into the space 13 below the ram 11 of the dilierential hydraulic ram R, thus moving the rams 11 and 10 upwardly and forcing fluid through the pipes 'l and 2 to the ram cylinder ll" above the mill ram lll at the crown wheel side of the sugar mill A, The amount of liquid to be accommodated in the space 13 helow the ram 11 will determine the stroke of the ram 1.1 and of the ram 10.

An important feature ot the invention is that the ditl'erential hydraulic ram R is so constructed that it is a simple matter to replace either the upper or the lower cylinder of said hydraulic rain with a, cylimler and ram oi a. different size should the chosen ratio not 'work out to complete satisfaction.

l claim:

1. A hydraulic equalizer comprising a. pressure regulating element, a movable ele* ment disposed within said pressure regulating element, pressuire-responsive means at opposite ends of a member with which the ergiializer is associated, a. pressure coiiductor leading from one end of said pressuresreguto the pressure ri'isponsive 'a l `Y-ieu'iber with which lating element element being of greater diameter and area than the face at the opposite end thereof.

2. A hydraulic equalizer comprising a pressure regulating element, a movable element disposed Within said pressure regulating element, means Within Which said movable element. is movable longitudinally of the axis thereof, pressure-responsivek means at opposite' ends of a member with which the equalizer is associated, a pressure conductor leading from one end of said pressure-regulating element to the pressure responsive means at one end of said member With Which the equalizer is associated, and a pressure conductor leading from the opposite end of said pressure-regulating element to the pressure responsive means at the opposite end of said member, the face at one end of said movable element being of greater diameter and area than the face at the opposite end thereof.

3. A hydraulic equalizer comprising, ak

pressure regulating element, a movable element disposed Within said pressure regulating element, cylindrical means Within which said movable element is movable longitudinally of the axis thereof, pressure-responsive means at opposite ends of a member with which the equalizer is associated, a pressure conductor leading from one end of said pressure-regulating element to' the pressure responsive means at one end of said member With Which the equalizer is associated, and a pressure conductor leading from the opposite end of said movable element to the pressure responsive means at the opposite end of said member, the face at one end of said movable element being of greater diameter and area than the face at the opposite end thereof.

4. A hydraulic ,equalizer comprising a pressure regulating element, a movable element disposed Within said pressure regulating el-ement, oppositely disposd cylinders in which the opposite end portions of said movable element moves, pressure-responsive means at opposite ends of a member With Whichthe equalizer is associated, a pressure conductor leading from one of said cylinders to the pressure responsive means at one end of said member With which the equalizer is associated, and a pressureconductor leading from the other cylinder to the pressure responsive means-at the opposite end of said member, the face at one end of said movable elem-ent being of greater diameter than the face at the opposite end thereof.

5. A hydraulic equalizer comprising a pressure regulating element, a movable element disposed Within said pressure regulating element, said movable element comprising a pair of rams arranged to abut With each other at their inner ends, oppositely disposed cylinders in which the opposite end portions of said movable element moves, pressure-responsive means at opposite ends of a member With Which'the equalizer is associated, a pressure conductor leading from one of said cylinders to the pressure responsive means at one end of said member with Which the equalizer is associated, and a pressure conductor leading from the other cylinder to the pressure responsive means at the opposite end of said member, the face at one end of said movable element being ofv greater diameter than the face at the opposite end thereof.

6. A hydraulic equalizer comprising a pressure regulating element including a pair of oppositely disposed cylinders, rams arranged for longitudinal movement Within said cylinders, said rams having ends thereof arranged in abutting relation, one of said cylinders, and the ram associated therewith being of greater diameter than the other cylinder andD ram, pressure-responsive meansat opposite ends of a member with Which the equalizer is associated, a pressure conductor leading from one of said cylinders to the pressure responsive means at one end of said member with which the equalizer is associated, and a pressure conductor leading from the other cylinder to the pressure responsive means at the opposite end of said member.

7. A hydraulic equalizer comprising a pressure regulating element including a pair of oppositely disposed cylinders, rams arranged for longitudinal movement within said cylinders, said rams having ends thereof arranged in abutting relation, and the end of one ram which abuts against the other ram being curved and being seated in a correspondingly shaped recess in said other ram, one of said cylinders and the ram associated therewith being of greater diameter than the other cylinder and ram, pressure-responsive means at opposite ends of a member with which the equalizer is associated, a pressure conductor leading from one of said cylinders to the pressure responsive means at one end of said member with which the equalizer is associated, and a pressure conductor leading from the other cylinder to the pressure responsive means at the opposite end of said member.

8. A hydraulic equalizer comprising a pressure regulating element including a pair of oppositely disposed cylinders, rams arranged for longitudinal movement Within said cylinders, said rams having ends thereof arranged in abutting relation, one of said cylinders and the ram associated therewith being of greater diameter than the other cylinder and ram, means for supporting said cylinders and the rams associated therewith, said cylinders and the associated rams being independently removable from said supporting means, pressure-responsive means at opposite ends of a member with which the equalizer is associated, a pressure conductor leading from one of said cylinders to the pressure responsive means at one end of said member with which the equalizer is associated, and a pressure conductor leading from the other cylinder to the pressure responsive means at the opposite end of said member.

9. A hydraulic equalizer comprising a pressure regulating element., an accumulator for supplying pressure to said pressure regulating element, a movable element disposedv Within said pressure regulating element, pressure-responsive means at opposite ends of a member with which the equalizer is assoeiated, a pressure conductorleading from one end of said pressure-regulating element to the pressure responsive means at one end of said member with which the equalizer is associated, and a pressure conductor leading from the opposite end of said pressure-regulating element to the pressure responsive means at the opposite end of said member, the face at one end of said movable element being of greater diameter and area than the face at the opposite end thereof.

10. A hydraulic equalizer comprising a pressure regulating element, a movable element disposed Within said pressure regula-ting element, pressure-responsive means at opposite ends of a member with Which the equalizer is associated, a pressure conductor leading from one end of said pressure-regulating element to the pressure responsive means at one end of said member with which the equalizer is associated, a pressure conductor leading from the opposite end of said pressure-regulating element to the pressure responsive means at the opposite endof said member, a conductor for placing said pressure conductors in communication With each other, the face at one end of said movable element being of greater diameter and area than the face at the opposite end thereof.

In testimony that I claim the foregoing I hereunto aix my signature.

FRANCIS HEGENBAR'IH.

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