US1698189A - Variable-speed paper-machine drive train - Google Patents

Description

Jan. 8, 1929.-

- H. F. DUNBAR VARIABLE SPEED PAPER MACHINE DRIVE TRAIN 3 Sheets-Shoat 1 Filed Apfil 15, 1925 R 0 M w N J 1% w afa/my 416W A TTORNE Y.

Jan. 8, 1929.

H. F. DUNBAR VARIABLE SPEED PAPER MACHINE DRIVE TRAIN 1 I l [UAW/i1.

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. UNITED STATES PATENT OFFICE.

Application filed Apr11'13, 1925. Serial No. 22,800.

This invention relates to a variable speed pa er machine drive train.

, n object of the invention is to rovidc a hydraulic driving mechanism for t e difi'er- 6 out parts or sections of a paper making machine, in order that these parts or sections may be driven at different speeds as may be desired. It is a well known'fact in the making of paper that it is very desirable to impart difi'erent'rates of travel to different strands or stretches of the web of paper between the different rolls "or other parts of the machine, or in other words to vary the draw .of the web.

A further object is to provide means for connecting and disconnecting the individual drive units of the machine from a main drive shaft, for adjusting the speed of each unit, after the s eed of the individual units have been care illy adjusted the speed of the entire machine may be regulated, as de sired, from the main drive shaft.

The sectional driving mechanism, broadly considered, comprises a plurality of prime or main driving motors that are suitably connected to small hydraulic pum s whici inturn, are connected by means 0 suitable piping to hydraulic motors that are directly connected by means of gearing and clutches to the different parts or sections of the paper machine. These pumps and hydraulic motors are sometimes spoken of as the. Universal hydraulic variable speed gear, which is fully described and illustrated in U. S. patent to Janney, No. 924,787, dated June 15, 1909 for a variable speed transmission device and in catalogue No. 108, of the Waterbury Tool Company, Connecticut.

The several smallerhydraulic ydraulie motors which are connected to the different parts or sections of the machineare known as the B end of this gear.

Referring to the drawings:

Fig. 1 is a general plan view of the layout of a paper making machine, showing the several driving units for the various sections of the machine and the main shaft for simultaneously adjusting the speed of all of the units of the machine.

Fig. 2 illustrates one of the rolls of a paper making machine which is connected, through a friction and square-jawed clutch, to the driving gear, and, also illustrating the threel lway valve for operating the friction c utc of \Vaterbury,

}pumps are known as the A end and the the handles for operating the two clutches for adjusting the riving units.

Fig. 5 is a plan view of one of the two clutch constructions for throwing in or out one of the units for adjusting the same.

Fig. 6 is an enlarged detail view of one of the sleeve elements on the horizontal shaft which extends the entire length of the ma I chine.

Fig. 7 is a detail sectional view showing the sleeve in place on the adjusting shaft, the twosquare jawed clutches'and the worm gear wheel'construction foradjusting the l units. Fig. 8 is a detail plan viewof the unit adgusting shaft showin two of the unit adjusting devices and t ree of the interposed.

universal joints in this shaft.

Fig. 9 is a side elevational view of Fig. 8 showing one of the main drive motors and'two of the A Referrin to the drawings in detail:

1, 2, and 3 designate the base-piecesibr end hydraulic pumps.

supporting the prime movers 4, 5, and 6 which are mounted. thereon. These movers may be electric motors. ends of these prime or driven thereby are the pumps 7, 8, 9, 10, 11, and 12 sometimes desighated as the A end pumps. The opposite ends of these smaller pumps are severally and hydraulically connected by the pi y es 13, 14, 15,16, 17, 1s, 19, 20, 21, 22, 23, an 24 to the motors 25, 26, 27, 28-, 28 and 29; these motors are sometimes designated as the B end motors of the individual drive units. These two hydraulically connected pumps and motors are known in the art as the universal, hydraulic variable speed gear referred to in the above mentioned catalogue, which rear, in general, comprises two rotating dis s therein, one of which is capable of being adjusted and set in planes at difierent angles relative to the axis of the shaft, whereby the rate of rotation of the driven or B end motors 25 to 29 inclusive'may be very accuratelyadjusted. The construction of these sectional driving pumps :and'motors or what is known as the universalhydraulic variable speed gear do not,'however, form any part of my At the opposite main motors, and

present invention.

smaller hydraulic slack of a strand of paper of any part of the machine may be adjusted independently of the rate of rotation of ankother part of a paper making machine. ach one of the main driving pumps 7 to 12'inclusive may therefore be adjusted in order that each one of the driven motors to 29 may be rotated at a definite speed for operating the different rolls or parts, etc. of a paper machine. These different parts of the machine are as follows: 30 is a wire screen; 31 the first press roll; 32 the second press roll; 33 the steam heated dryer rolls; 34 the sizing press roll;

and 35the revolving cutter. Extending vertically of each of the A end pumps 7 to 12 are shafts 36, which are operated from the main longitudinally extending motor adjusting shaft 37. 38 designates a bevel gear connection between the main shaft 37 and the several vertically arran ed shafts 36, (see Fig. 9) whereby when the shaft 37 is operated by any one of the hand wheels 39 all of the driving or A end pumps 7 to 12 will be simultaneously operated, or adjusted, with the result that the rate of rotation of all of the driven orB end motors. is correspondingly adjusted.

The rate of movement of the different parts 30 to 35 of the paper making machine will consequently be equally changed. It is to be particularly understood that the main motor adjusting shaft 37 is not to be operated until the rate of rotation of the different sectional parts or units 30 to 35 of the machine have been first carefully and independently adjusted. This is effected by the mechanism shown in Figs. 4 to 9 inclusive which is constructed as will be described. The pipes 13 to 24 inclusive are understood to be completely filled with some suitable liquid as thin oil. The flow of the liquid .back and forth between the several driving A end pumps 7 to 12 and the several driven B end motors 25 to 29 serves to operate the driven motors of the universal hydraulic variable speed gear.

Referring now to Fig. 3 in which one of the sections or units of a paper making machine is shown. as for example, the part 31, which is the first press roll. Connected to this roll is a s uare jawed clutch or coupling 40. 25 to 29 designates the B end motors of the universal gear. This motor is con nected to a driving pinion 42 of a herring bone gear. The motor 25 is connected to the pinion 42 by the flexible coupling 43. One end of this coupling is connected to the motor 25 and its other end to the short shaft 44. This shaft, with the pinion 42 is supported at its opposite ends in ball bearing pillow blocks 45. This pinion meshes with the large double herring bone gear 46 which 18 loosely mounted for free rotation on the drive shaft 47. For the pn use of connecting the gear 46 to the she. t 47 a friction clutch is provided which is operated by by when the piston 50 is operated the friction clutch may be thrown into and out of action thereby connecting and disconnecting the gear 46 to the shaft 47. For the purpose of operating the piston 50 pipes 54 and 55 are connected to the opposite ends of the cylinder 49 for admitting a suitable liquid, under pressure, into and from the opposite ends of the cylinder. This liquid is controlled by means of the three port valve 56 which controls the flow of the liquid pressure into and away from the opposite ends of the cylinder 49. 57 is the operating handle and pins 58 are provided for limiting the extent of movement of the handle. The part 56' is the inlet pressure port and 56 the discharging port.

For the purpose of-supplyinglubricatmg oil to the teeth of the gear wheels 42 and 46 a pump 59- is provided which is driven by the chain 60. 61 is a pipe which delivers the oil directly onto the teeth of the gears.

The main controlling shaft 37 is for changing the angle and consequently the speed of all of the A end pumps 7 to 12.

Referring now to the devices for adjusting the different sections or units of the machine and for simultaneously adjusting all of the sections. 62 designates a bevel gear secured to the upper end of the shaft 36. This gear meshes with the bevel pinion 63 which is an integral part of the sleeve member 64 (see Fig. 6) which is supported in the bearing 64', as shown in 7. The

opposite end of the sleeve is formed with a member 64. The hub part of this gear is formed with a square jaw clutch '69. Lo-

,cated at the ri ht hand end of the clutch 69 is a second c utch 70 which slides on the sleeve 64. This second clutch is slidably mounted on a key 71 which is secured to the sleeve 64. Each of these slidable clutches is provided with a forked operating lever 72 and 73 for moving the slidable clutch members 66 and 70,-respectively, into or out of engagement with the clutches 65 or 69. For the purpose of operating the worm wheel 68 a hand wheel 74 is provided that is attached to the shaft 75 having the worm 76 which meshes with the teeth of the worm gear wheel 68.

. rality of The operation of this speed controlling art of my improvement is as follows:

hould it be desirable to simultaneously adjust the speed of all of the sections or units of the machine from 30 to 35, the operator moves all of the levers 72 towards the left hand whereby all of the-nsmall jaw clutches 66 which are keyed to the main shaft 37 are placed in engagement with the jaw clutches of the sleeve 64. The clutches 69 are all out of engagement. This operation through the spline connection between the slidable collar which is formed with the jaws 66, and the main shaft 37 connects all of the shafts 36 through the gears 62 and 63. The shaft 37 is now operated by any one of the hand wheels 39, whereby all of the shafts 36 are rotated and the motion transmitted to the tilting box controls since the clutch 66 connects with the sleeve and the shaft 37. Should it be desirable to individually adjust any one of the sections or units of the machine indicated at 30 to 35 in Fig. 1, the operator by means of the lever 72 throws the clutch 66 out of engagement with the clutch on the sleeve 64. He also throws the slidable clutch member into engagement with the clutch jaws 69. This connects the worm gear 68 only with one of the sleeves 64. Now, when one of the hand wheels 74 is operated the worm gear will through the bevel pinion 63, gear 62, shaft 36, adjust the tilting box control of the pump 7 or any desired one of the A end pumps, whereby the speed of the particular sgction or unit will be accurately adjusted as desired.

The worm gears 68 may be freely rotated on the sleeves when the clutches at its ends are out of engagement. This permits the teeth of the clutches to be aligned so that they will mesh.

The universal joints 77 in the main control shaft 37 are employed for compensating for any misalignment of this shaft.

It will be seen that I have provided a Very efiicient means for varying the speed of any particular section of paper making machine by hydraulically operated motors, and, in additio'mthe speed of all of the motors of the different sections may be simultaneously controlled.

What I claim is:

1. A variable speed driving mechanism for the different sections of a paper making machine comprising in combination, a plumam motors, a plurality of pumps operated by the main motors, a plurality of other motors, h draulically connected to the pumps, means or individually adjusting the capacity of the pumps comprisinga main shaft, a gear loosely mounted thereon, means for operating the gear, means for connecting and disconnecting the gear to the main shaft, and operative connecting means between the main shaft, and any one of the pumps.

2. A variable speed driving mechanism for the different sections of a paper making machine for varying the draw of the web, comprising in combination, a plurality of main motors, a plurality of pumps 0 erated by the main motors, a plurality 0 other motors,

capacity of the pumps comprising a main shaft, a gear loosely mounted thereon, means for operating the gear, means for connecting and disconnecting the gear to the main shaft, and operative connecting means between the main shaft and anyone of the umps, the construction and arrangement eing such that the individual adjustment of the pumps may be disconnected and the capacity of all of the pumps adjusted atthe same time.

3. A drive mechanism for the different sections of a paper making machine com prising a main motor, a plurality of pumps operated therefrom, means for individually adjusting the capacitylof the pumps comprising a shaft, sleeves on the shaft, one-end of each of the sleeves having a pinion gear, second gears with which the pinion gears mesh, means for connecting the second gears to the pumps for adjusting the capacity of the same, and means for individually operating the sleeves.

4. A drive mechanism for .the different sections of a paper making machine comprising a main motor, a vplurality of pumps operated therefrom, means for individually adjusting the capacity of the pumps comprising a shaft, sleeves on the shaft, one end of each of the sleeves having a pinion gear, second gears with which the pinion gears mesh, means for connecting the second gears to the pumps for adjusting the caaeity of the same, and means for individual y operaing the sleeves and means for adjusting all of the pumps at the same time comprising slidable clutches on the shaft for connecting all of the sleeves to the shaft whereby when the shaft is operated all of the pumps will be adjusted.

HAROLD F. DUN BAR.

hydraulically connected to the pumps, means for individually adjusting the

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