GB2131322A - Frame construction for a pressure grinding machine of press type - Google Patents
Frame construction for a pressure grinding machine of press type Download PDFInfo
- Publication number
- GB2131322A GB2131322A GB08331412A GB8331412A GB2131322A GB 2131322 A GB2131322 A GB 2131322A GB 08331412 A GB08331412 A GB 08331412A GB 8331412 A GB8331412 A GB 8331412A GB 2131322 A GB2131322 A GB 2131322A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- pressure
- press
- frame construction
- chamber
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
- D21B1/18—Disintegrating in mills in magazine-type machines
- D21B1/24—Disintegrating in mills in magazine-type machines of the pocket type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/20—Disintegrating by grating
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
- D21B1/063—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using grinding devices
- D21B1/065—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using grinding devices of the magazine type
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/50—Machine tool, machine tool null till machine tool work handling
- G05B2219/50293—Radial setting of tool
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Paper (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Frame construction for a pressure grinding machine of press type, which frame construction comprises a gas- tight, pressure-proof grinding chamber (2), bearing housings (5) for a grinder member (3) revolving in the grinding chamber, as well as at least one press chamber (8) for the pulpwood and a press device (9, 10, 11) limiting the press chamber on one side. The frame construction consists of two separate parts, namely a pressure frame (1), which constitutes the said grinding chamber (2) and press chamber (8) and which substantially receives the pressure forces resulting from the positive pressure prevailing in the grinding chamber, and a power frame (18), which connects the press device (10) and the bearing housings (5) of the grindstone to each other and which substantially receives the tensile and circumferential forces resulting from the grinding and from the pressing of the wood against the grindstone. <IMAGE>
Description
SPECIFICATION
Frame construction for a pressure grinding machine of press type
The present invention is concerned with a frame construction for a pressure grinding machine of press type, which frame construction comprises a gas-tight pressure-proof grinding chamber, bearing housings for a grinder member revolving in the grinding chamber, as well as at least one press chamberforthe pulpwood and a press device limiting the press chamber on one side.
Such a frame construction is used in a pressure grinding machine in which groundwood is prepared by pressing the pulpwood by means of the press device against a revolving grindstone in a pressurized grinding chamber.
From the Finnish Patent 58,359, a pressure grinding machine is previously known in which a rotary grinder member, commonly a ceramic grindstone, is installed in a gas-tight, pressure-proof box-like frame. The frame is designed so that it comprises a press chamber for the pulpwood, surrounded by the grinding chamber, the said press chamber having the same positive pressure as the grinding chamber itself, as well as a space for the press device. The grindstone isjournalled in bearings placed outside the frame, the said bearings being attached to the frame by the intermediate of the base plate.
The press device comprises a shoe moving linearly towards the grindstone, and an actuating device moving the said shoe, usually a hydraulic working cylinder, which is attached to the end of the frame.
A pressure grinding machine intended for laboratory use is also known which is provided with a cylindrical frame whose longitudinal axis is parallel to the axis of rotation of the grindstone and to which frame the bearings of the grindstone as well as the press chamber for the pulpwood together with the press device are attached.
In the prior-art pressure grinding machines, besides the uniform load caused by the positive pressure prevailing in the grinding chamber, a tensile load is also directed at the frame, resulting from the pressing of the pulpwood against the grindstone, the said tensile load being passed from the press device along the walls of the frame to the bearings of the grindstone, Thereat, the construction of the frame becomes heavy, and consequently the cost of its manufacture becomes high. The designing and dimensioning of the frame as a pressure vessel is difficult, and the margins of safety become high.
The box-shaped frame used in a pressure grinding machine of production scale, moreover, has a highly disadvantageous shape in view of the pressure loading. Since the tensile strains are received by means of the side walls of the frame, large openings should be avoided in those walls. This is why the feed-in opening for the pulpwood must be placed at the top face of the frame, which again increases the construction height required in the grinding plant.
The object of the present invention is to provide a frame construction which avoids the above drawbacks and permits a more purposeful receiving of the pressure loads and tensile loads acting upon the frame construction. This objective is achieved by means of a frame construction in accordance with the invention, which is characterized in that the frame construction consists of two separate parts, namely
- a pressure frame, which constitutes the said grinding chamber and press chamber and which substantially receives the pressure forces resulting from the positive pressure prevailing in the grinding chamber, and
- a power frame, which connects the press device and the bearing housings of the grindstone to each other and which substantially receives the tensile and circumferential forces resulting from the grinding and from the pressing of the wood against the grindstone.
The invention is based on the idea that by forming the frame construction out of two parts, it is possible, in a more favourable way, to dimension and to design one of the frames so as to stand pressure strains and the other frame so as to stand tensile strains, and thereby to achieve a frame construction that is of lower weight and advantageous as a whole. Thereby the pressure frame receives the internal pressure load, and the power frame acts as a transmitter of tensile load between the press device and the bearings of the grindstone.
It is preferable that the shape of the pressure frame is cylindrical, which permits a minimation of the material strength. The longitudinal axis of the pressure frame is preferably perpendicular to the axis of rotation of the grindstone, so that, inside the pressure frame, a box-shaped press chamber can be installed for the pulpwood, which press chamber, at the same time, acts as a guide for the shoe of the press device.
The main strain directed at the power frame is the tensile load arising from the press force of the press device, which permits the use of a system of tensile beams as the power frame. To the tensile beams are attached a rigid fastening member for the press device as well as the bearings of the grindstone. The tensile beams also carry the pressure frame.
The pressure frame and the power frame may be connected to each other by means of a separate rigid piece to which the bearings of the grindstone are fixed.
The set of tensile beams acting as the power frame is favourably designed such that the feed-in opening of the pulpwood can be placed horizontally at the side of the pressure frame, whereat the necessary construction height in the grinding plant is reduced.
The invention will be described in more detail below with reference to the attached drawings, wherein
Figure 1 is a partly sectional side view of a pressure grinding machine provided with a preferred embodiment of the frame construction in accordance with the present invention,
Figure 2 is a horizontal sectional view of the grinding machine along line ll-ll in Figure 1,
Figure 3 is a vertical sectional view of the grinding machine along line Ill-Ill in Figure 1,
Figure 4 illustrates the load diagram of the frame construction,
Figure 5 is a perspective view of a pressure grinding machine provided with a frame construction in accordance with a second embodiment,
Figure 6 is a perspective view of a pressure grinding machine provided with a frame construction in accordance with a third embodiment,
Figure 7 is a perspective view of a pressure grinding machine provided with a frame construction in accordance with a fourth embodiment, and
Figures 8 and 9 show a further embodiment of the frame construction as a side view as a section along line IX-IX in Figure 8, respectively.
The pressure grinding machine shown in Figures 1 to 4 comprises a cylindrical, gas-tight and pressureproof pressure frame 1, at one of whose ends a grinding chamber 2 is formed. In the grinding chamber, a grinding member 3 is installed, whose axis of rotation 4 is positioned perpendicularly to the longitudinal axis of the pressure frame and is supported by outside bearings 5. The pressure frame is provided with sealed passages 6 for the axis of rotation.
Inside the pressure frame, a box-shaped element 7 is installed which forms a press chamber 8 for the pulpwood, open towards the grindstone. The press chamber is, in one direction, limited by a shoe 9, which is attached to the piston rod 11 of a hydraulic cylinder 10. Forthe purpose of guiding the shoe, the box-shaped element is provided with inside guides 12. The element 7 is fixed by means of supports 14 to the pressure frame and to outside supports 15. The hydraulic cylinder extends through the sealed passage 16 formed into the pressure frame and is fixed to the outside support 17.
The frame construction additionally comprises a power frame 18, which, in this example, consists of two beams 19 placed outside the pressure frame and extending along the sides of the pressure frame, being parallel to the longitudinal axis of the pressure frame, the bearings 5 of the grindstone and the supports 15 of the pressure frame and the support 17 of the hydraulic cylinder being attached to the said two beams 19.
The pressure frame supports a feed-in pocket 20 for pulpwood, which pocket is placed above the press chamber and can be closed pressure-proof.
The bottom of the pressure frame is provided with an outlet opening for the discharge of the groundwood pulp out of the pulp basin formed in the bottom part of the pressure frame. The grinding machine additionally comprises a motor, not shown, for rotating the grindstone.
The pressure frame 1 is dimensioned and designed so as to stand the constant positive pressure maintained in the grinding chamber. The power frame 18 is dimensioned and designed so as to stand the tensile forces that are produced when the pulpwood is being pressed by means of the hydraulic cylinder 10 against the revolving grindstone for the purpose of grinding the wood, as well as the circumferential force that is produced when the grindstone revolves against the pulpwood. Figure 4 illustrates the loading acting upon the frame construction. It is noticed that the power frame receives the said tensile and circumferential forces substantially alone and acts as a rigid transmitter of the tensile forces between the bearings of the grindstone and the press device, whereat the pressure frame becomes free from the load caused by these forces.
The frame construction shown in Figure 5 differs from the above embodiment mainly in the respect that the supports 15, by means of which the pressure frame 1 is, in Figure 2, supported on the power frame 18, have been made a separate rigid piece 25, which surrounds the pressure frame. At opposite walls of the rigid piece, bearings 5 have been installed for the axis of rotation of the grindstone. The beams of the power frame have been attached to the rigid piece.
The frame construction shown in Figure 6 differs from the embodiment of Figure 5 mainly in the respectthatthe box-shaped element7 described in relation to Figure 1 is here dimensioned and designed as the power frame 28, which is placed inside the pressure frame 1 and attached to the rigid piece 25.
The pressure grinding machine can also be constructed as a machine comprising two press devices and two press chambers, as is illustrated in Figure 6.
In the frame construction shown in Figure 7, which substantially corresponds to that shown in Figure 5, the beams of the power frame 38 are placed so that a free space remains at the side of the pressure frame for the feed-in pocket 30 for pulpwood.
Similarly to the embodiment shown in Figure 6, the frame construction shown in Figures 8 and 9 is based on the utilization of the box-shaped element 7 in the formation of the power frame. The box-shaped element 7 located inside the pressure frame 1 is dimensioned and designed as a part of the power frame 48, which part is attached by means of supports 14 to the supports 15 outside the pressure frame. The supports 15 are attached to the beams 19' placed at the sides of the pressure frame, which beams support the bearings 5 of the grinding member.
The drawings and the related description are just supposed to illustrate the idea of the invention. In its details, the frame construction in accordance with the invention may show even considerable variation within the scope of the patent claims.
Claims (11)
1. Frame construction for a pressure grinding machine of press type, which frame construction comprises a gas-tight, pressure-proof grinding chamber, bearing housings for a grinder member revolving in the grinding chamber, as well as at least one presschamberforthe pulpwood and a press device limiting the press chamber on one side, said frame construction comprising two separate conmponent units, namely
- a pressure frame, which constitutes said grinding chamber and press chamber and which substantially receives the pressure forces resulting from the positive pressure prevailing in said grinding chamber, and
- a power frame, which connects said press device and said bearing housings of the grindstone to each other and which substantially receives the tensile and circumferential forces resulting from the grinding and from the pressing of the wood against said grindstone.
2. Frame construction as claimed in claim 1, wherein said pressure frame is cylindrical and that the longitudinal axis of the cylinder is placed perpen dicuiarly to the axis of the bearing housings of said grinder member.
3. Frame construction as claimed in claim 2, wherein an inside box-shaped element is attached to said pressure frame, said element forming said press chamber, which is open towards said grinding chamber and into which said press device extends, said pressure frame being provided with supports by means of which said pressure frame is attached to said power frame.
4. Frame construction as claimed in claim 3, wherein said power frame consists of a set of tensile beams which supports said bearing housings of the grinder member, said supports of the pressure frame, and a support for said press device.
5. Frame construction as claimed in claim 3, wherein said supports of the pressure frame consist of a rigid support piece which is provided with said bearing housings of the grinder member and to which said power frame is attached.
6. Frame construction as claimed in claim 5, wherein said box-shaped element inside the pressure frame constitutes said power frame.
7. Frame construction as claimed in claim 5, wherein said power frame consists of a set of tensile beams that connects said rigid support piece and said supports of the press device.
8. Frame construction as claimed in claim 3, wherein said power frame consists of said boxshaped element inside said pressure frame and of a set of tensile beams which supports said bearing housings of the grinder member and said element.
9. Frame construction as claimed in claim 8, wherein said box-shaped element is attached to said set of tensile beams by means of said supports of the pressure frame.
10. Frame construction as claimed in any of claims 3 to 9, wherein at the side of said pressure frame, there is a horizontal feed-in pocket passing from outside said pressure frame into said press chamberforfeeding-in of the pulpwood.
11. Frame construction substantially as hereinbefore described and as shown in Figures 1 to 4 or
Figure 5 or Figure 6 or Figure 7 or Figures 8 and 9 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI824222A FI66440C (en) | 1982-12-08 | 1982-12-08 | RAMKONSTRUKTION FOER EN TRYCKSLIPMASKIN AV PRESSTYP |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8331412D0 GB8331412D0 (en) | 1984-01-04 |
| GB2131322A true GB2131322A (en) | 1984-06-20 |
| GB2131322B GB2131322B (en) | 1987-02-04 |
Family
ID=8516428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08331412A Expired GB2131322B (en) | 1982-12-08 | 1983-11-24 | Frame construction for a pressure grinding machine of press type |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS59130393A (en) |
| AT (1) | AT388578B (en) |
| BR (1) | BR8306738A (en) |
| CA (1) | CA1227366A (en) |
| DE (1) | DE3342955A1 (en) |
| FI (1) | FI66440C (en) |
| FR (1) | FR2537620B1 (en) |
| GB (1) | GB2131322B (en) |
| SE (1) | SE456916B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE462223B (en) * | 1987-12-11 | 1990-05-21 | Sunds Defibrator Ind Ab | SEAT AND DEVICE FOR MANUFACTURING OF CHEMICAL MECHANICAL MASS FROM LIGNOCELLULO MATERIAL IN THE FORM OF CLAVED PIECES WITH A LENGTH OF AT LEAST 100 MM |
| US6985943B2 (en) | 1998-09-11 | 2006-01-10 | Genesys Telecommunications Laboratories, Inc. | Method and apparatus for extended management of state and interaction of a remote knowledge worker from a contact center |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE70478C (en) * | A. F. UNGER in Henriksholm, Änimskog, Schweden | Feed device for wood grinding machines | ||
| DE81107C (en) * | ||||
| DE508075C (en) * | 1925-02-05 | 1930-09-24 | Linke Hofmann Busch Werke Abte | Device for regulating the advance of wood grinders |
| DE1975587U (en) * | 1967-05-19 | 1967-12-21 | Miag Muehlenbau & Ind Gmbh | TWO-PRESS WOOD SANDER. |
| FI60251C (en) * | 1979-07-20 | 1981-12-10 | Tampella Oy Ab | TRAINING SYSTEM FOR TRAILERS AND TRAILERS |
-
1982
- 1982-12-08 FI FI824222A patent/FI66440C/en not_active IP Right Cessation
-
1983
- 1983-11-18 AT AT406883A patent/AT388578B/en not_active IP Right Cessation
- 1983-11-22 CA CA000441703A patent/CA1227366A/en not_active Expired
- 1983-11-24 GB GB08331412A patent/GB2131322B/en not_active Expired
- 1983-11-26 DE DE19833342955 patent/DE3342955A1/en active Granted
- 1983-12-01 FR FR8319378A patent/FR2537620B1/en not_active Expired - Fee Related
- 1983-12-05 JP JP22860683A patent/JPS59130393A/en active Granted
- 1983-12-07 BR BR8306738A patent/BR8306738A/en not_active IP Right Cessation
- 1983-12-07 SE SE8306745A patent/SE456916B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3342955C2 (en) | 1987-10-01 |
| GB2131322B (en) | 1987-02-04 |
| SE8306745L (en) | 1984-06-09 |
| SE456916B (en) | 1988-11-14 |
| FI66440C (en) | 1984-10-10 |
| GB8331412D0 (en) | 1984-01-04 |
| BR8306738A (en) | 1984-07-17 |
| FR2537620B1 (en) | 1993-07-16 |
| FR2537620A1 (en) | 1984-06-15 |
| ATA406883A (en) | 1988-12-15 |
| CA1227366A (en) | 1987-09-29 |
| FI66440B (en) | 1984-06-29 |
| JPS59130393A (en) | 1984-07-26 |
| DE3342955A1 (en) | 1984-06-14 |
| SE8306745D0 (en) | 1983-12-07 |
| FI824222A0 (en) | 1982-12-08 |
| AT388578B (en) | 1989-07-25 |
| JPH0314953B2 (en) | 1991-02-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19941124 |