CA1162825A - Wood chipper - Google Patents
Wood chipperInfo
- Publication number
- CA1162825A CA1162825A CA000380586A CA380586A CA1162825A CA 1162825 A CA1162825 A CA 1162825A CA 000380586 A CA000380586 A CA 000380586A CA 380586 A CA380586 A CA 380586A CA 1162825 A CA1162825 A CA 1162825A
- Authority
- CA
- Canada
- Prior art keywords
- chips
- discharger
- cutter disc
- housing
- chipper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Debarking, Splitting, And Disintegration Of Timber (AREA)
Abstract
WOOD CHIPPER
Abstract of the Disclosure A wood chipper comprising a cutter disc enclosed in a housing mounted on which on one side of the plane of rotation of the cutter disc is an infeed spout, and on the other side, a chips discharger, the infeed spout and chips discharger being arranged with respect to each other so that between their axes are formed angles ? and .beta. respectively, in horizontal and vertical planes, each not exceeding 30°.
Fig. 1.
Abstract of the Disclosure A wood chipper comprising a cutter disc enclosed in a housing mounted on which on one side of the plane of rotation of the cutter disc is an infeed spout, and on the other side, a chips discharger, the infeed spout and chips discharger being arranged with respect to each other so that between their axes are formed angles ? and .beta. respectively, in horizontal and vertical planes, each not exceeding 30°.
Fig. 1.
Description
~L~2~
WOOD CHIPPER
The present invention relates generally to machine~ for technological chips forming and3 in particular, to wood chip-pers.
~ he pulp and paper industr~ is currently facing a problem of developing wood chippers for chip~ forming with no lo~es of wood and noise damped down to a tolerable level.
Known from the USSR Author's Certificate No.436,742, published 1974, is a wood chipper comprising a housing whe-rein a rotary cutter disc with knives, provided with fan bla-des is arranged, an infeed spout mounted on said hou~ing on one side of the cutter disc plane of rotation, a chips discharger arranged on its other side and oommunicated with the interior of the housing by mean~ of a chip~ receiving con-nection and a spiral airduct.
In this wood chipperg the air passes into the housing both from the side of the infeed spout and from the ~ide o~
the chips discharger, the air vortices being formed in the area where the airduct is oonnected to the chlps discharger.
At a certain distance betwaen the di~c and said area, movement of a part of the air pa~ing into the housing is ¢ou~tercu-rrent with respect to the chip~ movement. ~his movement o~
the ~ir detariorate~ the fan blades operational e~fectiveness and, thus, chips remo~ing from the chipper, that can lead to a partial clogging of the airduct. ~oreover, becau~e of the countercurrbnt movement of the part of the air with respeot to the chip~ stream, a part of the ch~p~ i~ forced back into the hou~ing and enga~ed by the cutter disc) thereby oontribu-ting to forming of sliv~ra, pin~ a~d sawd~ t partiole~
(hereina~ter ro~rr~d to a~ a ~in ~ raction) u~fit for use in ,~ .
pulp and pap~r industry. ~ide~ the proee~a i8 accompanied by ~ high level noise.
Another wood chipper known from the USSR Author's Certi-ficate ~o.449,808, published in 1974, i~ eonsidered, in it~
essenee, a~ having the mo~t likeness with ths pr~sent inven-tion. ~hi3 ehipper comprise~ a hou~ing aeeommodating a rota~
ry eutter di3e with knives. An infeed spout i8 mounted on the housing on one side o~ the ehipper dise plane o~ rotation, while a reeeiving hopper with a mechanical ehip~ diseharger is arranged on it8 other side. The maehanieal chips discharger is made as a ~crew conveyor positioned at the bottom o~ the hopper adjacent to the housing wall and having a port suffi-cient in size for passing the chips therethrough without impaet3. ~he noise level is dumped down in this ehipper, and the quantity of the ~ine fraetion is d~erea~ed, since impinge-ment of the ehips upon the chipper parts is eliminated.
It i~ impossible, however, in this ehipper to completely exelude the fine fraetion formation and initiation of the noise beeause of impaets chipR against chips in the hopper. What i8 more, elimi~ating of the chips impingements upon the chipper metal part~ is achieved due to inereased volume of the hopper whioh, in turn, results in enlarging of the chipper overall dimensions. Moreover, an additional arrangement for removing the chips from the chipper is required.
It i3 an objeet of the present invention to provide a wood chipper wherein noi~e level is dumped down to minimum.
Another object of the invention i8 to provide a wood chipper wherein the chips are produeed wi-th no losses of wood.
Still another objeet of the invention re~ide~ in providing a wood ehipper wherein no additional arrangements are required for removing the chips from the chipper~
~6~Z5 With these and other objects in view there is provlded a wood chipper comprising a cutter disc, enclosed in a hou-sing 9 an in~eed spout mounted on said housing on one side o~ the cutter disc plane of rotation, and a chips di~charger arranged on its other side, wherein, according to the inven-tion, the in~eed spout (3) and chips discharger (4) are arran-ged with respect to each other so that between their axes are ~ormed angles cC and ~ respectively, in horisontal and vertical planes, each not exceeding 30.
It has been experimentally found that the chips stream leaves the housing at angles not exceedlng 30, so positioning o~ the chips discharger in respect of the infeed spout at angles not exceeding 30 ensures passing o~ the chip stream from the housing into the chips discharger without impinge-ment upon the chipper parts, causing high level noise and fine fraction formation, ~ he abovementioned and othar objects, features and ad-vantage.q of the invention will be best understood from the following de~cription o~ an exemplary embodiment th~reof, when read in con3unction with the accompanying drawings, wherein:
Pig. 1 is a plane view of a wood chipper in accordance with the invention, and Pig. 2 is a sectional view taken through the line II- II
in Pig. 1.
According to Pig. 1, a wood chipper of the present inven-tion comprises a cutter disc 1 enclosedlp a housing ~, an infeed spout 3 mounted substantially horizontally thereon on one side of the plane of rotation of the cutter disc 1, while arranged on the housing 2 on the other side of said plane i9 a chips discharger 4. Through a coupling 5, the rotar~ cut-ter disc 1 is connected with a drive 6. The infe~d spout 3 is mounted at the bottom of the housing 2 at angls 38. The chip~ discharger 4 is so arranged that its a~is is deflec-ted in a horisontal plane with respect to thc axis of thc infeed spout 3 in a direction of circumferential velocity of the cutter disc 1 at an angle ~ o~ 15.
The axis of the chips discharger 4 (~ig. 2)is deflected in a vertical plane in respect of th~ axis of the infeed spout 3 at an angle ~ of 10. The rotary cutter disc 1 i~
equipped with twelve radial knives 7 po~itioned substantial-ly equidistantly along the circumference of the cutter disc 1.
Arranged under each knive 7 is a respective slot 8 for the chips. ~low area of the chips discharger 4 i3 twice as large as that of the infeed spout 3.
The wood chipper operates as follows.
Wood pieces are fed to the rotary cutter disc 1 through the infeed spout 3. They are cut there by the knives 7 of the cutter disc 1, and the resultant chips pass in the form of a stream through the slots 8 and the chip discharger 4 by the action of elastic forces arising during cutting. Speed filming of the chips stream movement in the chippers, the part of the housing 2 being cut away, has revealed that the direction of the movement of the stream is within the limits of deflec-tion of the axis of the chip~ discharger 4 with re~peot to the axis of the infeed spout 3 in vertical and horisontal planes at angle~l not exceeding 30~
Thus, with such a rnutual arrangement of the axes of the chips discharger 4 and the infeed spout 3, the impinge-ment of the chips stream upon the part~ of the chipper is eliminated. The increa~ed ~low area of the chips discharger 4 as compared to tha-t of the infeed spout 3 additionally en-sures the movement of the chips stream through the chip~
discharger 4 without impact.q.
Although the present invention ha~ beon described by way of particular illustrative embodiment, many changes and modifications of the invention may become apparent to those skilled in the art without departing from the ~pirit and scope thereof. It is therefore intended that the ¢laims given hereinafter will cover all such changes and modifications as may reasonably and properly be included within the scope of this contribution to the art.
WOOD CHIPPER
The present invention relates generally to machine~ for technological chips forming and3 in particular, to wood chip-pers.
~ he pulp and paper industr~ is currently facing a problem of developing wood chippers for chip~ forming with no lo~es of wood and noise damped down to a tolerable level.
Known from the USSR Author's Certificate No.436,742, published 1974, is a wood chipper comprising a housing whe-rein a rotary cutter disc with knives, provided with fan bla-des is arranged, an infeed spout mounted on said hou~ing on one side of the cutter disc plane of rotation, a chips discharger arranged on its other side and oommunicated with the interior of the housing by mean~ of a chip~ receiving con-nection and a spiral airduct.
In this wood chipperg the air passes into the housing both from the side of the infeed spout and from the ~ide o~
the chips discharger, the air vortices being formed in the area where the airduct is oonnected to the chlps discharger.
At a certain distance betwaen the di~c and said area, movement of a part of the air pa~ing into the housing is ¢ou~tercu-rrent with respect to the chip~ movement. ~his movement o~
the ~ir detariorate~ the fan blades operational e~fectiveness and, thus, chips remo~ing from the chipper, that can lead to a partial clogging of the airduct. ~oreover, becau~e of the countercurrbnt movement of the part of the air with respeot to the chip~ stream, a part of the ch~p~ i~ forced back into the hou~ing and enga~ed by the cutter disc) thereby oontribu-ting to forming of sliv~ra, pin~ a~d sawd~ t partiole~
(hereina~ter ro~rr~d to a~ a ~in ~ raction) u~fit for use in ,~ .
pulp and pap~r industry. ~ide~ the proee~a i8 accompanied by ~ high level noise.
Another wood chipper known from the USSR Author's Certi-ficate ~o.449,808, published in 1974, i~ eonsidered, in it~
essenee, a~ having the mo~t likeness with ths pr~sent inven-tion. ~hi3 ehipper comprise~ a hou~ing aeeommodating a rota~
ry eutter di3e with knives. An infeed spout i8 mounted on the housing on one side o~ the ehipper dise plane o~ rotation, while a reeeiving hopper with a mechanical ehip~ diseharger is arranged on it8 other side. The maehanieal chips discharger is made as a ~crew conveyor positioned at the bottom o~ the hopper adjacent to the housing wall and having a port suffi-cient in size for passing the chips therethrough without impaet3. ~he noise level is dumped down in this ehipper, and the quantity of the ~ine fraetion is d~erea~ed, since impinge-ment of the ehips upon the chipper parts is eliminated.
It i~ impossible, however, in this ehipper to completely exelude the fine fraetion formation and initiation of the noise beeause of impaets chipR against chips in the hopper. What i8 more, elimi~ating of the chips impingements upon the chipper metal part~ is achieved due to inereased volume of the hopper whioh, in turn, results in enlarging of the chipper overall dimensions. Moreover, an additional arrangement for removing the chips from the chipper is required.
It i3 an objeet of the present invention to provide a wood chipper wherein noi~e level is dumped down to minimum.
Another object of the invention i8 to provide a wood chipper wherein the chips are produeed wi-th no losses of wood.
Still another objeet of the invention re~ide~ in providing a wood ehipper wherein no additional arrangements are required for removing the chips from the chipper~
~6~Z5 With these and other objects in view there is provlded a wood chipper comprising a cutter disc, enclosed in a hou-sing 9 an in~eed spout mounted on said housing on one side o~ the cutter disc plane of rotation, and a chips di~charger arranged on its other side, wherein, according to the inven-tion, the in~eed spout (3) and chips discharger (4) are arran-ged with respect to each other so that between their axes are ~ormed angles cC and ~ respectively, in horisontal and vertical planes, each not exceeding 30.
It has been experimentally found that the chips stream leaves the housing at angles not exceedlng 30, so positioning o~ the chips discharger in respect of the infeed spout at angles not exceeding 30 ensures passing o~ the chip stream from the housing into the chips discharger without impinge-ment upon the chipper parts, causing high level noise and fine fraction formation, ~ he abovementioned and othar objects, features and ad-vantage.q of the invention will be best understood from the following de~cription o~ an exemplary embodiment th~reof, when read in con3unction with the accompanying drawings, wherein:
Pig. 1 is a plane view of a wood chipper in accordance with the invention, and Pig. 2 is a sectional view taken through the line II- II
in Pig. 1.
According to Pig. 1, a wood chipper of the present inven-tion comprises a cutter disc 1 enclosedlp a housing ~, an infeed spout 3 mounted substantially horizontally thereon on one side of the plane of rotation of the cutter disc 1, while arranged on the housing 2 on the other side of said plane i9 a chips discharger 4. Through a coupling 5, the rotar~ cut-ter disc 1 is connected with a drive 6. The infe~d spout 3 is mounted at the bottom of the housing 2 at angls 38. The chip~ discharger 4 is so arranged that its a~is is deflec-ted in a horisontal plane with respect to thc axis of thc infeed spout 3 in a direction of circumferential velocity of the cutter disc 1 at an angle ~ o~ 15.
The axis of the chips discharger 4 (~ig. 2)is deflected in a vertical plane in respect of th~ axis of the infeed spout 3 at an angle ~ of 10. The rotary cutter disc 1 i~
equipped with twelve radial knives 7 po~itioned substantial-ly equidistantly along the circumference of the cutter disc 1.
Arranged under each knive 7 is a respective slot 8 for the chips. ~low area of the chips discharger 4 i3 twice as large as that of the infeed spout 3.
The wood chipper operates as follows.
Wood pieces are fed to the rotary cutter disc 1 through the infeed spout 3. They are cut there by the knives 7 of the cutter disc 1, and the resultant chips pass in the form of a stream through the slots 8 and the chip discharger 4 by the action of elastic forces arising during cutting. Speed filming of the chips stream movement in the chippers, the part of the housing 2 being cut away, has revealed that the direction of the movement of the stream is within the limits of deflec-tion of the axis of the chip~ discharger 4 with re~peot to the axis of the infeed spout 3 in vertical and horisontal planes at angle~l not exceeding 30~
Thus, with such a rnutual arrangement of the axes of the chips discharger 4 and the infeed spout 3, the impinge-ment of the chips stream upon the part~ of the chipper is eliminated. The increa~ed ~low area of the chips discharger 4 as compared to tha-t of the infeed spout 3 additionally en-sures the movement of the chips stream through the chip~
discharger 4 without impact.q.
Although the present invention ha~ beon described by way of particular illustrative embodiment, many changes and modifications of the invention may become apparent to those skilled in the art without departing from the ~pirit and scope thereof. It is therefore intended that the ¢laims given hereinafter will cover all such changes and modifications as may reasonably and properly be included within the scope of this contribution to the art.
Claims
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
A wood chipper comprising a cutter disc; a housing acco-mmodating said cutter disc; an infeed spout mounted on said housing on one side of a plane of rotation of said cutter disc; a chips discharger mounted on said housing on the other side, said infeed spout and chips discharger being arranged with respect to each other so that between their axes in horizontal and vertical planes are formed angles ? and .beta..
respectively, each not exceeding 30°.
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
A wood chipper comprising a cutter disc; a housing acco-mmodating said cutter disc; an infeed spout mounted on said housing on one side of a plane of rotation of said cutter disc; a chips discharger mounted on said housing on the other side, said infeed spout and chips discharger being arranged with respect to each other so that between their axes in horizontal and vertical planes are formed angles ? and .beta..
respectively, each not exceeding 30°.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000380586A CA1162825A (en) | 1981-06-25 | 1981-06-25 | Wood chipper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000380586A CA1162825A (en) | 1981-06-25 | 1981-06-25 | Wood chipper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1162825A true CA1162825A (en) | 1984-02-28 |
Family
ID=4120312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000380586A Expired CA1162825A (en) | 1981-06-25 | 1981-06-25 | Wood chipper |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1162825A (en) |
-
1981
- 1981-06-25 CA CA000380586A patent/CA1162825A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |