US2463084A - Revolving high-velocity jet for hollow-head-type barker having lowpressure watere supply - Google Patents

Description

March 1, 1949. H. E. BUKQWSKY 2,453,084

- REVOLVING HIGH-VELOCITY JET FOR HOLLOW-HEAD-TYPE BARKER HAVING Low-PRESSURE WATER-SUPPLY 3 Sheets-Sheet 1 Filed Feb. 6, 1945 INVENTOR. HAR RY E, BU KOWSKY ATTORNEY.

2,463 TYPE H. E. BU KOWSKY I March 1,

REVOLVING HIGH-VELOCITY JET FOR HOLLOW-HEAD BARKER HAVING LOW-PRESSURE WATER-SUPPLY 3 Sheets-Sheet Filed Feb. 6, 1945 INVEN TOR. E B U KOWS KY HARRY BY Y W ATTORNEY.

2,463,084 T FOR HOLLOW-HEAD-TYPE SURE WATER-SUP E. BUKOWSKY REVOLVING HIGH-VELOCITY JE BARKER HAVING LOW-PRES FLY Filed Feb. 6, 1945 3 Sheets-Sheet 3 March 1, 1949.

INVENTOR. HARRY E. BUKOWSKY ATTORNEY.

. Patented Mar. 1', 1949 UNITED STATES. PATENT OFFICE REVOLVING HIGH-VELOCITY JET FOR HOL- LOW-HEAD-TYPE BARKER HAVING LOW- PRESSURE WATER SUPPLY Harry E. Bukowsky, Port Townsend, Wash., as-

signor to Crown Zellerbach Corporation, San Francisco, Calif., a corporation of Nevada Application February 6, 1945, Serial No. 576,493

I 9 Claims. 1

This invention relates to hydraulic means for removing the bark from the surface of logs.

In most hydraulic log barking machines it is necessary to rotate the log during the debarking operation and also either to move the log longitudinally through the barker or to provide means by which the debarking nozzle can be moved longitudinally along the log.

A principal object of this invention is the providing of an improved hydraulic log barking machine in which no rotation of the log is required and in which removal of the bark from the log surface will take place while the log is being moved longitudinally or endwise through the machine. The accomplishment of this object enables the bark removing operation to proceed uninterruptedly and the bark to be removed from one log after another as each log in turn passes through the barker, and furthermore enables logs of any length to be debarke'd in the machine.

All hydraulic log barking devices heretofore used have, to the best of my knowledge, required the delivery of water to the device or machine at high pressure. This necessitates the employment of high pressure pumps, high pressure piping and special packing, all of which involves certain problems of maintenance and expense. The necessity of such high pressure apparatus is necessary in ordinary hydraulic debarking machines in order to insure proper jet velocity from the debarking nozzle for removing the bark satisiactorily and efliciently.

An important object of the present invention is to provide a hydraulic barker in which the water may be delivered to the machine at low pressure and the necessary hydraulic jet velocity developed in the machine itself.

Another object is to provide a hydraulic barker in which a debarking jet, or plurality of jets, directed against the log surface, will move around the log in a plane normal to the direction of travel of the log, thus causing the debarking to take place in a spiral path as the log passes through the barker.

A further object of this invention is to provide an improved hydraulic barker in which the jet velocity can be readily controlled and modifled, thus enabling the jet velocity to be adapted to the type of logs being debarked and to the thickness of the bark.

An additional object is to provide a hydraulic barker in which a debarking jet is produced without the use of the ordinary hydraulic nozzle.

These objects and other advantages I attain by providing a pair of rotating ring assemblies,

2 rotating in opposite directions and cooperating to produce a debarking jet in the manner hereinafter explained, and by otherwise constructing my barker as hereinafter briefly described.

In the following explanation and description reference is made to'the accompanying drawings,

'in which:

Figure 1 is a top plan view of the main portion of my barker, showing part of a log in the process of having the bark removed;

Figure 2 is a section through the upper half of the barker taken longitudinally with respect to the log and corresponding to line 2--2 of Figure 5;

Figure 3 is a fragmentary staggered transverse section through the upper portion of the barker corresponding approximately to line 3-3 of Figure 1;

Figure 4 is a side elevation taken from the left side of Figure 1; and

Figure 5 is an end elevation taken from the forward or discharging end .of the barker.'

In the drawings the means for conveying the log longitudinally through the barker has been omitted for the sake of clarity, but it is to be understood that any suitable means will be employed for moving the log longitudinally and at uniform speed through the machine in the direction indicated by the arrows X in Figures 1, 2 and 4.

The barker includes an inner cylindrical shell I or manifold and, in the particular machine illustrated, the inner shell or manifold comprises two sections, I2 and I3 (see Fig. 2). These sections l2 and I3 have the same internal diameter and are mountedin axial alignment with a center space between them. Their inner ends terminate in vertically extending flanges l4 and I5 respectively, and their outer ends are flared as shown at l6 and I1 respectively. Each of these inner sections is supported on a pair of standards I, (see Figs. 1, 4 and 5) secured to the frame base An annular chamber I8 is formed about the gether and permit the water to be projected r9.-

dially outward through them from the chamber l8.

A pair of rotating ring assemblies, indicated in general by the reference characters 23 and 24 (Fig. 2), are located around the stationary sections l2 and I3 respectively. These rotating as- 4 which extends a short distance within the assembly 24. A scoop 31 (shown more clearly in Fig. 3) is rigidly secured to the outer end of the flange 35. The face of this scoop is preferably concaved in the direction of travel (clockwise) of the assembly 23 by which it is carried. Thus, as apsemblies are spaced from the stationary sections but are concentric with them. Each of these rotating assemblies is provided with a pair of U- shaped rings or tracks 25 mounted on the outside periphery, as shown in Fig. 2. Each rotating assembly is supported by three or more pairs of wheels 26 (see Fig. Two pairs of wheels are mounted for rotation in bearing blocks 21 (Figs. 4 and 5) attached to the base Ill of the frame, and four pairs of similar wheels are mounted in .blocks 28 secured to a frame side wall 29 (Fig. 5). The frame side wall 23 is rigidly supported on the base l0 and is braced by a pair of integral braces 30. The pairs of wheels 28 engage the tracks (see Fig. 1) and thus keep the rotating assemblies in place while permitting them to be rotated freely and rapidly.

A driving belt 3| passes around each rotating assembly to enable rapid rotation to be imparted to the assembly on the supporting wheels. Each driving belt is driven by suitable means (not shown), such as an electric motor, and preferably gears and controls are included in such means so that a very high rate of speed, as well as controllable rates of speed can be imparted independently to each assembly. The electric motors or other means for driving the belts 3| respectlvely rotate in opposite directions so that the belts 3| are driven in opposite directions respectively and accordingly the rotating assemblies are rotated in opposite directions. Thus, as viewed in Figs. 1, 3 and 5, the assembly 23 is rotated clockwise, as indicated by the arrow 1 in" Fig. 3, and assembly 24 is rotated counter-clockwise. as indicated by the arrow 2. The reason for such rotation of the two assemblies in opposite directions will be apparent later.

The rotating assembly 24 is formed with an annular U-shaped channel 32 (Fig. 2) with the hollow of the U towards the inner side of the assembly. This channel 32 is in registration with the annular extension 2| and the outlet ports 22 of the chamber It on the stationary shell section l3. Thus the water from chamber l8, being discharged through the outlet ports 22, will be de-,

livered into the channel 32. Due to the fact that the assembly 24 is rotating rapidly the water delivered into channel 32 will be prevented by centrifugal force from being spilled out of the channel 32. A plurality of curved vanes 33 (see Fig. 3) extend across the channel 32. These vanesare concaved in the direction of travel (counterclockwise) of the rotating assembly 24 and thus act as buckets in picking up the water discharged from the outlet ports 22 and force the water in channel 32 to move at the same speed as the rotating assembly 24.

A second U-shaped channel 34 (Fig. 2) adjacent to the channel 32, is provided in the rotating assembly 24. Ports 35 (Figs. 2 and 3) in the wall between these two channels permit water from channel 32 to pass into channel 34., There are no vanes in channel 34, but since the water in channel 32 is moving at the same peripheral speed as the assembly 24 it will continue to move with the assembly at this same speed when it is in channel 34.

The rotating assembly 23 (Fig. 2) has an extending cylindrical flange 36 at its innerend parent from Fig. 3, the scoop 31, extending intog the channel 34, moves in the opposite direction from that in which the water in channel 34 is moving. The result of the engagement of the scoop 31 with the water is to cause a jet of water, as indicated at 38 in Figs. 2 and 3, tobe directed inwardly in the barker, passing through the annular inwardly opening outlet 39 between the two stationary shell sections [2 and I3, which let strikes the surface of the log L.

The operation of the barker in brief is as follows: Water in quantity suflicient for the desired debarking jet or jets is supplied to the stationary annular chamber l8 and passes therefrom to the U-shaped channel 32. The water reaching channel 32 of the rapidly rotating assembly 24 is prevented by centrifugal force from spilling out of the channel and is rotated with assembly 24, due in part to the vanes 33 located in channel 32. The water thus in motion passes through the ports 35 into the channel 34 in which the water continues to be rotated with the assembly 24. But the water in channel 34 is then engaged by one or more scoops 31, mounted on the other assembly 23, and thus moving rapidly in the opposite rotational direction. The engagement of the scoop with the water in channel 34 results in a Jet of water extending inwardly in the annular opening between the flanges l4 and I5 of the stationary inner sections 12 and I3 and following the rotational movement of the scoop, The log is moved longitudinally through the inner sections l2 and I3 and the Jet from the scoop strikes the log surface and removes the bark in a spiral path.

The velocity of the water in the jet 38 will depend on the rotational speeds of the rotating assemblies 23 and 24 and will be about twice the rim speeds of these assemblies. Thus by rotating the assemblies at sufliciently high speed a jet velocity equal to that obtained by ordinary debarking nozzles can be produced, but without necessitating the employment of actual nozzles.

Although I show only a single scoop 31 carried by the rotating assembly 23, it would be possible to mount more than one on the assembly 23. In such case the scoops should of course be symmetrically spaced. Thus, two scoops may be provided at diametrically opposite points on the flange 36 of the assembly 23 and the result will be the same as having two debarking nozzles arranged at opposite sides of the machine. Having more than one debarking jet of course enables the machine to operate with better balance and also provides more rapid debarking. In any case provision must be made for an adequate supply of water to the channel 34 so that proper volume of water will be delivered by the debarking Jet or Jets for most eflicient removal of bark and the cleaning of the log surface.

Due to the fact that high rotational speeds of the rotating assemblies are required, it is advisable to use steel belts for driving the rotating assemblies.

Since the velocity of the debarking jet or jets depends directly on the speeds of the rotating assemblies, a control of such speeds enables the debarking jet to meet the requirements of the particular type of logs which are being debarked.

Various modifications could of course be made aceaoss 'in the details of construction in the machine which I have described, without departing from the principle of my invention, The particular machine described is merely illustrative of a device for carrying my invention into effect, It is not my intention to confine myself to the particular construction illustrated or to limit my invention otherwise than as set forth in the claims. I claim:

1. In a hydraulic barker, a pairof rotatable assemblies, means for rotating said assemblies in relatively opposite directions, an annular interior channel in one of said assemblies, means for delivering water to said channel, means in said channel for causing said water to rotate with said channel and assembly, whereby centrifugal force engaging face of said scoop member to enable water from said scoop member to pass into the interior of said barker, whereby said jet will be directed against the surface of alog passing through the interior of said barker and the velocity of said jet will be determined by the speeds of rotation of said assemblies.

2. In a hydraulic barker, a pair of ring assemblies, means for rotating said assemblies inde-' pendently in relatively opposite directions, an

annular U-shaped channel in one of said assemblies, means for delivering water to said assembly and channel, means in said channel for causing said water to rotate with said channel and assembly, whereby centrifugal force developed by such rotation will prevent water from spilling out of said channel, a scoop member carried by the other assembly, said scoop member extending into said channel and engaging part of the water in said channel, a portion of the waterengaging face of said scoop member directed inwardly in said barker to cause the water from said scoop to be directed inwardly in said barker in the form of a revolving jet when said assemblies are moving in relatively opposite directions, an inwardly opening outlet in said other assembly extending from the water-engaging face of said scoop member to enable water from said scoop member to pass into the interior of said barker, whereby said jet will be directed against the surface of a log passing through the interior of said barker and the velocity of said jet will be determined by the speeds of rotation of said assemblies.

3. In a hydraulic barker of the character described, a pair of rotatable ring assemblies, means for rotating said assemblies in relatively opposite directions, an annular U-shaped channel on the interior of one of said assemblies, vanes extending across said channel, means for delivering water into said channel, a second U-shaped channel in said one assembly adjacent to said first channel, ports connecting said first and second channels, whereby the water delivered into said first mentioned channel will be engaged by said vanes and caused to travel around at the same speed as said first mentioned assembly and will pass into said second channel while traveling approximately at this speed, the centrifugal force developed as-a result of such speed preventing the water from spilling out of either of said channels, a scoop member carried by the other assembly, said scoop member extending into said second channel and engaging part of the water in said second channel, a portion of the water-em gaging face of .said scoop member, directed inwardly in said barker to cause the water from said scoop member to be directed inwardly in said barker in the form of a revolving jet when said assemblies are moving in relatively opposite directions, an inwardly opening outlet in said other assembly extending from the water-engaging face of said scoop member to enable water from said scoop member to pass into the interior of said barker, wherebysaid jet will be directed against the surface of a log passing through the interior of said barker and the velocity of said jet will be determined by the speeds of rotation of said assemblies.

4. In a hydraulic barker of the character described, a pair of rotatable ring assemblies, means for rotating said assemblies independently in relatively opposite directions, an annular U shaped channel on the interior of one of said assemblies, vanes extending across said channel, the

front faces of said vanes being concaved in the direction of rotation of said one assembly, means for delivering water into said channel, a second U-shaped channel in said one assembly adjacent to said first channel, ports connecting said first and second channels, whereby the water delivered into said first mentioned channel will be engaged by said vanes and caused to travel around i at the same speed as said first mentioned assembly and will pass into said second channel while traveling approximately at this speed, the centrifugal force developed as a result of such speed preventingthe water from spilling out of either of said channels, a scoop member carried by the other assembly, said scoop member extending into said second channel and engaging part of the water in said second channel, the water engaging face of said scoop member being concaved-in the direction of rotation of said other assembly whereby to cause the water from said scoop member to be directed inwardly in said barker in the form of a revolving jet when said assemblies are moving in relatively opposite directions, an inwardly opening outlet in said other assembly extending from the water-engaging face of said scoop member to enable water from said scoop member to pass into the interior of said barker, whereby said jet will be directed against the surface of a log passing through the interior of said barker and the velocity of said jet will be detergiined by the speeds of rotation of said assemlies.

5. In a hydraulic barker, a pair of rotatable assemblies. means for rotating said assemblies in relatively opposite directions, an annular U- shaped channel on the interior of one of said assemblies, vanes extending across said channel, a stationary member located within said one assembly, said stationary member having a chamber, means for supplying water to said chamber, said chamber having outlet ports adapted to direct jets of water outward from said chamber, said outlet ports being in registration with said channel, whereby the water will be delivered into said channel from said ports, a second U-shaped channel in said one assembly adjacent to said first channel, ports connecting said first and sec- 7 and channels, whereby the water delivered into said first mentioned channel will be engaged by said vanes and caused to travel around at the same speed as said first mentioned assembly and will pass into said second channel while traveling approximately at this speed, the centrifugal force developed as a result of such speed preventing the water from spilling out of either of said channels, a scoop member carried by the other assembly, said scoop memberextending into said second channel and engaging part of the water in said second channel, a portion of the water-engaging face of said scoop member directed inwardly in said barker to cause the water from said scoop member to be directed inwardly in said barker in the form of a revolving jet when said assemblies are moving in relatively opposite directions, an inwardly opening outlet in said other assembly extending from the water-engaging face of said scoop member to enable water from said scoop member to pass into the interior of said barker, whereby said jet will be directed against the surface of a log passing through the interior of said barker and the velocity of said jet will be determined by the speeds of rotation of said assemblies. 7

6. In a hydraulic barker, a pair of ring assemblies, means for rotating said assemblies in relatively opposite directions, an annular U-shaped channel on the interior of one of said assemblies,

vanes extending across said channel, a stationary.

ring-shaped member located within said one assembly, said stationary member having a chamber, means for supplying water to said chamber,

said chamber having outlet ports adapted to direct jets "of water outward from said chamber, said outlet ports being in registration with said channel, whereby the water will be delivered into said channel from said ports, a second U- shaped channel in said one assembly adjacent to veloped as a'result of such speed preventing the water from spilling out of either of said channels, a scoop member carried by the other assembly, said scoop member extending into said second channel and engaging part of the water in said second channel, a portion of the waterengaging face of said scoop member directed inwardly in said barker to cause the water from said scoop member to be directed inwardly in said barker in the form of a revolving jet when said assemblies are moving in relatively opposite directions, an inwardly opening outletin said other assembly extending from the water-engaging face of said scoop member to enable water from said scoop member to pass into the interior of said barker, whereby said jet will be directed against the surface of a log passing through the interior of said barker and the velocity of said jet will be determinedby the speeds of rotation of said assemblies. I

7. In a hydraulic barker of the character described, a pair of rotatable ring assemblies, means for rotating said assemblies independently in relatively opposite directions, an annular U- shaped channel on the interior of one of said assemblies, vanes extending across said channel, the front faces of said vanes being concaved in the direction of rotation of said one assembly, a stationary shell located within-said latter mentioned assembly, said stationary shell having an annular chamber, means for supplying water to said chamber, said chamber having outlet ports adapted to direct jets of water outward from said chamber, said outlet ports being in registration with said channel, whereby the water will be delivered into said channel from said ports, a second U-shaped channel in said one assembly adjacent to said first channel, ports connecting said first and second channels, whereby the water delivered into said first mentioned channel will be engaged by said vanes and caused to travel around at the same speed as said one assembly and will pass into said second channel while traveling approximately at this speed, the centrifugal force developed as a result of such speed preventing the water from spilling out of either of said channels, a scoop member carried by the other assembly, said scoop member extending into said second channel and engaging part of the water in said second channel, the water engaging,

face of said scoop member being concaved in the direction of rotation of said other assembly whereby to cause the water from said scoop member to be directed inwardly in said barker in the form of a revolving jet when said assemblies are moving in relatively opposite directions, an inwardly opening outlet in said other assembly extending from the water-engaging face of said scoop member to enable water from said scoop member to pass into the interior of said barker, whereby said jet will be directed against the surface of a log passing through the interior of said barker and the velocity of said jet will be determined by the speeds of rotation of said assemblies.

8. A hydraulic barker of the character described including a pair of rotatable ring assemblies, means for rotating said assemblies in relatively opposite directions, an annular U-shaped channel on the interior of one of said assemblies, vanes extending across said channel, the front faces of said vanes being concaved in the direction of rotation of said one assembly, a stationary ring-shaped shell located within said one assembly, said assemblies and said stationary shell being co-axial, said stationary shell having an annular chamber, means for supply water to said chamber, said chamber having outlet ports adapted to direct jets of water outward from said chamber, said outlet ports being in registration with said channel, whereby the water will be delivered into said channel from said ports, a second U-shaped channel in said one a'ssembly adjacent to said first channel, ports connecting said first and second channels, whereby the water delivered into said first mentioned channel will be engaged by said vanes and caused to travel around at the same speed as said one assembly and will pass into said second channel while traveling approximately at this speed, the centrifugal force developed asa result of such speed preventing the water from spilling out of either of said channels, a scoop member carried by the other assembly, said scoop member extending into said second channel and engaging part of the water in said second channel, the water engaging face of said scoop member being concaved in the direction of rotation of said other assembly whereby to cause the water from said scoop member to be directed inwardly in said barker in the form of a revolving jet when said assemblies are moving in relatively opposite directions.

an inwardly opening outlet in said other assembly extending from the water-engaging face of said scoop member to enable water from said scoop member to pass into the interior of said barker, whereby said jet will be directed against the surface of a log passing through the interior of said barker and the velocity of said jet will be determined by the speeds of rotation of said assemblies. and means'for supporting said assemblies for rotation.

9. In a hydraulic barker, a pair of axially alined annular assemblies, means for rotating said assemblies in relatively opposite directions, an anular inwardly-open channel in one assembly,

REFERENCES errEn The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,087,959 Lisherness et a1. Feb. 24, 1914 1,373,372 Waite Mar. 29, 1921 1,736,799 Planert NOV. 26, 1929 2,124,914 Fottinger July 26, 1938 2,422,757 Swift June 24, 1947 FOREIGN PATENTS Number Country Date 35,574 Sweden Oct. 1, 1913

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