JPH0252035B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disk cartridge assembly for a multi-plate disk refiner, which allows the combination of a stator disk and rotor disk to be shipped without damage, and eliminates errors in the refiner position. It provides a convenient cartridge-type assembly for easy installation.

BACKGROUND OF THE INVENTION When paper stock comes from a beater, digester, or other pulping machine, it is common to further disintegrate it by milling or passing it between disintegrating surfaces. These grinding surfaces crush the fiber raw materials, further separating the fibers and subjecting them to physical changes.

A typical conventional pulp refiner is disclosed in US Pat. No. 3,371,873. The refiner includes a rotating disk with an annular disintegrating surface on one or both sides. This rotating disc disintegrating surface is in an opposing relationship with the non-rotating annular grinding surface,
The pulp is disintegrated in the disintegration area between them. The rotating disk and disintegrating surface are made of a substantially rigid material such as cast iron or hardened stainless steel. The non-rotating milling surface is made of a similar material and is rigidly mounted to withstand the torsion caused by the rapidly rotating disk and the pressure on the pulp stock through the gap in the disintegration zone. The axial adjustment of the disaggregation region gap is performed by moving the shaft on which the disk is mounted in the axial direction.

This type of rigid disk cliff iner must be manufactured and assembled to precise tolerances in order to accurately set the disintegration zone gap width. Since the loads applied to the rigid disc are large during the defibration process, a large and extremely robust design is required so that the relationship of the defibration surfaces does not change under load. This necessarily requires close tolerance machining, large amounts of high-strength disc material, bulky overall construction, limits machine capacity, and requires extra assembly time, making rigid disc cliff ainas very expensive. I am making it a thing.

Pulp refiners have been greatly improved with the development of multi-disc cliff iners that operate at low intensities. For example, U.S. patent application Ser. A disintegrating device is disclosed. The suspension must pass between these disintegrating surfaces while being disaggregated during the relative rotation of each surface. Means is provided for effecting effective material flow radially across the faces between the faces.
An improvement of this US patent application is the use of elastically deflectable disintegration surface support means. This allows the disintegration surfaces to move in relation to each other in the axial direction depending on the operating pressure, thereby achieving a self-aligning function and achieving optimal raw material disintegration results using the disintegration surfaces. .

In a pulp refiner of the type disclosed in the above-referenced U.S. application, an annular defibrating faceplate of limited radial width is provided which extends over the insertion end of the disk piece which is elastically deflectable in the axial direction. installed on. The disk ends of one set of disk pieces at a fixed distance from the insertion end are fixed to the rotor, while the disk ends of the other set are mounted for non-rotation or counter-rotation. The disintegration face plate is made of a suitably hard and sufficiently rigid material. In contrast, the disk pieces are made of an axially elastic, flexible material that strongly resists circumferential deformation. Due to the manner in which the axially deflecting disk pieces are supported,
During the pulp disintegration process, axial self-adjustment of the disintegrating surfaces takes place to compensate for variations in pressure conditions, so that optimal disintegrating action is achieved between the relatively rotating disintegrating surfaces.

Such multi-plate disk-cliff iners have brought about substantial improvements in defibration technology. It was found that by using a low-strength, multi-plate disc iner, pulp properties could be significantly improved compared to conventional disintegration techniques. However, in practice it has been found necessary to make it possible to easily replace the disintegrating disk. In other words, the multi-plate type disk cliff aina can use up to 16 disintegrating disks, so these can be used one by one as before.
The downtime required to replace the sheets is considerable. Furthermore, there is a risk that the disintegration disk will be improperly attached to the adjacent disintegration disk.

SUMMARY OF THE INVENTION The present invention provides a disk cartridge assembly that includes all disintegrating disks pre-assembled in the correct position and that can be easily installed in a multi-plate disk pulp refiner. By using this disk cartridge assembly, mounting errors can be eliminated, and at the same time, maintenance time can be significantly reduced.

That is, the present invention comprises a plurality of rotors whose center portions are supported at a predetermined interval on a hub portion with a hub spacer interposed therebetween, a plurality of coaxial rotor disks whose inner ends are supported, and these rotor disks. A plurality of coaxial stator disks are interposed and whose outer ends are mounted on the outer cylindrical part of the socket-shaped casing through fingers, and one end of which is engaged with the bottom wall of the socket-shaped casing and the other end thereof is mounted on the outer cylindrical part of the socket-shaped casing. The pressurizing flat portion that protrudes radially inward is pressed against the stator plate disposed outside the outermost rotor disk, and the flange portion that protrudes radially outward formed at the other end is pressed. and a plurality of clips removably bolted to the outer cylindrical portion of the cup-shaped casing.

Embodiment In FIG. 1, reference numeral 10 generally indicates a cartridge which is a preferred embodiment of the present invention. This cartridge contains all the necessary parts for easy installation into a multi-disc cliff iner. The rotating and stationary disaggregation pieces are positioned to provide adequate operating clearance once all are assembled.
Such a one-piece structure facilitates handling during installation and protects the disintegration disk during transportation and storage.

For ease of explanation, the terms "rotor" and "stator" will be used to distinguish between the two sets of disintegrating disks. However, it should be understood that the present invention is also applicable to refiners that rotate in opposite directions and that relative movement between opposing defibration surfaces is required for the defibration action.

Cartridge 10 is provided for a sliding fit in the refiner assembly, and the cooperating parts of the refiner, including a hub portion 11, are shown in dotted lines in FIG. These include an axle 12 with a shoulder 13 and a hub fixing ring 14 on the opposite side. The hub portion 11 is restricted in axial movement between the shoulder 13 and the hub locking ring 14. Thrust plate 15a closes off the front end of the assembly.

Hub portion 11 has a rotor consisting of spokes 15-19 as shown in FIG. Arcuate recesses 20 are formed between the spokes through which the suspension flows into the working cavity of the refiner. The spokes 15-19 are made of glass fiber reinforced resin such as epoxy resin or high hardness stainless steel.

The spoked rotor is secured to the hub by bolts 21 which are screwed into axial threaded holes in a flange portion 22 forming part of the hub assembly.

The spoked rotor drivingly couples hub portion 11 to a plurality of spaced apart refined inner rotor disks, such as disks 24, 25 and 26 shown in FIG. The rotor disk 2 is placed between the fixed end plate 27 and the first stator disk 28. The rotor disks 24, 25 and 26 are in the form of annular rings with ribs on opposing surfaces that provide abrasion and fibrillation. Rotor disk 24 is adjacent end plate 27 along interface 29 .
When the clamping pressure is released, the rotor disk 24 is allowed to move slightly axially due to the flexural support, creating a gap between the rotor disk and the end plate 27. The other side of the rotor disk 24 has ribs that abut corresponding ribs on the stator disk 28 along the interface 30 when the refiner disks are clamped together.

Similarly, the ribs on rotor disk 25 oppose corresponding ribs on stator disk 28 along interface 31. The rotor disk 25 is clamped together with the stator disk 33 along the interface 32 on the opposite side. Similarly, rotor disk 26 adjoins stator disk 33 along interface 34 and is clamped to stator plate 36 along interface 35. When the clamping pressure is relieved, these discs can also move axially, creating a disintegration gap between the opposing surfaces.

Stator discs 28 and 33 are tightened into position by bolts 37 seen in FIG. The flexible fingers 39 and 40 are firmly supported in recesses (not shown) in the stator disk;
It serves to support the stator disk while allowing some axial movement to compensate for pressure differential fluctuations at the various working gaps. A perforated spacer 41 securely fixes the outer ends of fingers 39 and 40.

Hub spacers 42 and 43 are provided between the individual rotors to provide adequate clearance between the ablation disks.

As shown in Figure 1, the cartridge has holes 44.
The holes serve to support bolts (not shown) or other fastening means for tightening the cartridge to the stationary head of the refiner.

The cartridge assembly of the present invention utilizes a modified clip 50 best illustrated in FIG. Clip 50 includes a perforated flange portion 51 having a through hole therein. Each clip also has a pressurizing flat portion 53 opposite the perforated flange portion 51 for pressurizing the rotor and stator disk. A sloping handle portion 54 connects the annular flange 51 with a cylindrical end 55. This end is generally numbered 58
The generally cup-shaped, open-ended casing bottom wall 57 shown in FIG. Although the clips 50 are preferably arranged between several holes 44, the number of clips used may vary depending on the size of the refiner.

Ring 59 is arranged between spacer 41 and annular flange portion 51 of the clip. Ring 59 has an internal hole that supports a fastening means, such as a bolt 60, which loosely connects the clip to ring 59. Furthermore, the bolt 37 passes through the ring 59 and the spacer 51 and is screwed into the side wall of the socket-shaped casing 58. In embodiments such as the pivoting rigid ring connection described above, it is desirable that ring 59, spacer 41 and casing 58 be made as one piece. In such a device, bolt 3
7 can be deleted.

As illustrated in FIG. 3, each clip 50 is arranged to press against the outer circumference of the defibration plate with a pressure determined by the tightening of the bolt 60. Bolts 37, which hold casing 58, spacer 41 and ring 59 together, allow the clip to tighten the entire disk cartridge assembly during shipping and storage. It also serves to hold each disk along its proper axis during shipping and assembly. The clips 50 are bolted to the outer ring 59 and tighten the entire disk firmly to prevent damage to the disintegration surface during handling. The clip also further ensures proper alignment of the rotating and fixed disks during installation. After installing the cartridge in the machine, the clip 58 is removed and the rotating and stationary disks are free to float and seek proper operating clearance.

Thus, the cartridge of the present invention allows all disintegration disks to be preset in precise positions, facilitating installation of the entire cartridge into the user's machine. This eliminates the opportunity for installation errors and reduces maintenance time requirements. Clips attached to the cartridge hold each disk along the proper axis during shipping and assembly. Since the discs are all tightly clamped together, damage to the disintegration surfaces during handling is prevented. This device also further ensures proper alignment of the rotating and fixed pieces during installation.

If the refiner requires replacing the disintegrating plate,
The work is done by first opening the door of the refiner and removing the old disk. The cartridge of the present invention is inserted into the refiner by sliding the hub portion 11 onto the shaft 12 and into butt engagement with the shoulder 13. The hub clamping ring 14 and thrust plate 15a are fixed in a defined position and limit axial movement of the hub. The bolt includes a ring 59, a spacer 41 and a casing 5.
8 and fixed at the rear of the refiner. At this stage the device is secured to the refiner and the clips are removed. bolt 60
is removed and the clip is removed. The plate 36 is now free and attached to the refiner door in a known manner. The additional through bolt is secured through the hole 44 from which the clip 50 was removed, and the refiner door is closed.

It will be apparent that various modifications may be made to the described embodiments without departing from the scope of the invention.

[Brief explanation of the drawing]

Figure 1 is a side elevational view of the cartridge related to assembly; Figure 2 is a perspective view of one clip used in the cartridge of Figure 1; Figure 3 is a line drawn from Figure 1.
FIG. 4 is a partial cross-sectional view taken substantially along the line - of FIG. 3; 10... Cartridge, 11... Hub part, 12...
Shaft, 13...Shoulder, 14...Hub locking ring, 15~
19...spoke, 15a...thrust plate, 20...dent,
21, 37, 60... Bolt, 22... Flange, 2
4-26...Rotor disk, 27...End plate, 2
8,33...Stator disk, 29-32,3
4, 35... Boundary surface, 36... Stator plate, 39, 4
0...Finger, 41-43...Spacer, 44,5
2, 56... Hole, 50... Clip, 51... Flange, 53... Plane part, 54... Handle, 55... Cylindrical end part,
57...Bottom wall, 58...Casing, 59...Ring.

Claims (1)

[Claims] 1 Place the center part on the hub part 11 with the hub spacer 4
A plurality of coaxial rotor disks 24, 25, 26 whose inner ends are supported on a plurality of rotors supported at a predetermined interval with rotors 2 and 43 interposed therebetween, and an outer rotor disk inserted between these rotor disks and The ends thereof are engaged with a plurality of coaxial stator disks 28, 33 mounted on the outer cylindrical portion of the top-shaped casing 58 via the fingers 39, 40, and the one end portion 55 is engaged with the bottom wall 57 of the top-shaped casing. A pressurizing flat portion 53 formed at the other end and protruding inward in the radial direction is pressed against the stator plate 36 disposed outside the outermost rotor disk 26. Flange portion 5 protruding toward
1 and a plurality of clips 50 removably bolted to the outer cylindrical portion of the cup-shaped casing.