JPS61146895A - Papermaking multi-plate type refiner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disintegrating device for processing fibrous suspensions in paper manufacturing, in particular a disintegrating device that connects a rotating drive means and a refining disk that performs the disintegrating action. Relating to interconnecting flexible links.

It is disintegrated with the conventional technology. On these surfaces, fibrous raw materials decompose,
Re-separation and physical modification of the fibers takes place.

A typical pulp refiner is Thom
As) is disclosed in US Pat. No. 3,371,873. This type of glue 7 aina includes a rotating disc with an annular ablation surface on one or both sides. The disintegration disk surface is in opposing relationship with a non-rotating annular grinding surface, and the gap therebetween forms a disintegration zone that acts on the pulp.

The rotating disk and disaggregation surface are made of a substantially inflexible material, such as cast iron or hard stainless steel.

The non-rotating milling surface is made of a similar material and is rigidly mounted to withstand the torque created by the rapidly rotating disk and the pressure on the pulp stock through the disintegration zone gap. The axial adjustment of the disintegration zone gap is carried out by moving the shaft to which the disk is attached in the axial direction.

This type of rigid disc refiner must be manufactured and assembled to close tolerances to accurately set the defibration zone gap width. During the disintegration process, the rigid disk
Since the load involved is large, it is necessary to design a large and extremely strong structure so that the relationship between the disintegrating surfaces does not change due to the load. This is the reason why rigid disc refiners are extremely costly. This is because they must necessarily be machined to close tolerances, require large amounts of high-strength disc material, have a bulky overall structure, yet limit machine volume, and require excessive assembly time. It is from.

Substantial improvements in Parburi 7 aina have recently been achieved with the advent of multi-plate refiners operating at lower intensities. For example, U.S. patent application Ser. A defibration device is provided that includes radially extending, relative rotary abrasives and axially opposed defibration surfaces. The suspension is defibrated between the disintegrating surfaces while the disintegrating surfaces rotate relative to each other. Also provided are means for flowing the material radially between the surfaces and transversely. A particular improvement according to the invention consists in the use of resiliently flexible disaggregation surface support means. This means adjusts the disintegrating surfaces in relative rotation in the axial direction depending on the operating pressure, so that optimum raw material processing results can be obtained at these disintegrating surfaces.

Any low viscosity glue finer has several rotating disintegration disks driven by a common central drive knob. During operation, these discs must be free to move axially back and forth by approximately a few millimeters. If we use the usual method to give this degree of freedom in the axial direction,
Pulp fibers accumulate from the slurry surrounding the rotating disk, impeding axial movement until it stops moving altogether.

The above-mentioned prior application discloses a laminated membrane plate made of thin figuglass. It has sufficient axial flexibility to facilitate movement of the disk, yet is torsionally strong enough to transmit the desired rotational forces.

However, if this membrane plate is used for a relatively short period of time, the step 6
The openings in the membrane plate for flow purposes and to promote axial flexibility become large due to the abrasive nature of the particles present in the slurry.

This phenomenon of enlargement of the openings eventually becomes a cause of damage to the laminated film plate.

Structure of the Invention The present invention provides a refiner structure using a plurality of disks arranged. One set of discs rotates, the other set is stationary, and both sets of discs are rotated in opposite directions. These sets of disks are disposed within the housing.

The housing has an inlet and an outlet for the fiber suspension therethrough. Drive means are provided for rotating one or both sets of discs within the housing. The two sets of discs have ablation surfaces facing each other. A small working gap is formed between these disintegrating surfaces, through which the fiber suspension passes from the inlet to the outlet. According to the invention, a plurality of flexible links are provided which interconnect the drive means with the rotary defibration disc so as to drive the rotary defibration disc in rotation but allow some axial deflection or floating.

In a preferred embodiment of the invention, means are provided for pivotally connecting one end of each link to the drive means, the other end of the link being capable of limited pivoting movement. It is supported by a pivot pin. The pivot pin extends between several pairs of opposingly facing rotating disintegrating disks.

In a preferred arrangement, at least two sets of flexible links are in a quadrilateral arrangement with respect to each other.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 10 designates a multi-plate refiner of the type to which the improvements of the present invention can be applied. The refiner 10 includes a housing 11 with an inlet 12 and an outlet 13. The shaft 14 is mounted for rotation within the housing 11 and is keyed to the knob 15 by a key 16. The cover plate 17 is fixed to the hub 15 with bolts 18.

During its passage between inlet 12 and outlet 13, the fiber suspension is forced to pass between rotating and stationary refining disks, which fibrillate the suspended fibrous material into separate fibrils. do. Rotating disks 20 and 21:22
and 23; and 24 and 25 are shown in the drawing.

The rotating disk 20 has a lip 26 opposite the lip 27 made in the end plate 28 and is screwed into the screw 29 by screws 29.
K is fixed. The operational gap between the opposing cabinets is code 3.
It is indicated by 0.

The refiner disk 21 has a releasable lip that faces the lip formed on the fixed disk 31, and an operating gap 32 is formed therebetween. The other stationary disk 33 is mechanically connected to the stationary disk 31 and has a lip facing the rotating disk 22, so that an operating gap 34 is formed therebetween.

The second set of stationary discs 35 and 36 cooperates with opposing rotating discs 23 and 24, respectively, and forms working gaps 37, 38. Finally, the refiner lip of rotating disk 25 cooperates with fixed end plate 39 to form working gap 40 .

The stationary disk is supported within the housing by flexible membrane plates 41 and 42 shown in FIG. These membrane plates are made from a suitable material such as 7-Ipa glass sheet. Membrane plates 41 and 42
is fixed to the housing on the opposite side of the ring 43;
This ring is positioned with a double-sided threaded pin 44 that is secured with a nut 45.

While the illustrated embodiment uses a stationary stationary disk and a co-rotating rotating disk to accomplish the disintegrating action, the present invention employs several sets of disks, all rotating. It is also possible to have several sets of discs rotate in opposite directions.

The invention particularly relates to the manner in which a rotating disk is supported for rotation from a drive means, while allowing some limited axial flexibility to accommodate axial deflections between the disk and the drive hub. are doing. As an example,
A flexible link 51 having one end supported by an elongated pivot pin 52 and an opposite end supported by a short pivot pin 53 together with spacer rings 55 and 56 have distal ends including a pivot pin 59. , to position the centrally arranged flexible links 58. As best illustrated in FIG. 2, the opposing surfaces of the refiner disks 22 and 23 are notched, as shown at 60, to accommodate movement of the links.

In the illustrated embodiment, there are eight pivot-ended flexible links equally spaced circumferentially and arranged to twist from the drive hub. Each link is made of thin, heat-treated steel of some thickness and accommodates the axial deflection between the disc and the nozzle by bending around a plane axis in the same way as a flat spring without exceeding its elastic limits. do. At the same time, the tensile load along the link axis transfers rotational force from the hub to the disc. As a result of the bending deflection of each link, the distance between the set of pivot pins in the hub and the set of pivot pins (pins 59 and 52) in the disk decreases, resulting in a slight angular movement between the hub and the disk; Easily adjusted by the pin end of the link. Since the concentric alignment between the hub and the disk keeps them square with each other with a minimum of two pairs of opposing links, eight links of four pairs of opposing links are more than sufficient to keep them concentric.

The ability of the flexible link to accommodate moderate axial movement during operation is best illustrated in FIG. Link 58 is shown as an arcuate contour line with a somewhat exaggerated amount for illustrative purposes. The bending of the link is sufficient to automatically adjust the width of the working gaps 34 and 37 to the same dimensions during the defibration operation.

Thus, the flexible linkage of the present invention transmits rotational motion from a common drive plate to a number of concentric disks with variable axial clearance. Instead of metal laminate structures, fiberglass sheets and the like may be used, which are less susceptible to erosion by the fiber slay V surrounding the disk assembly.

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 drawings]

FIG. 1 is a partial cross-sectional view of a multi-plate refiner embodying the present invention; FIG. 2 is a cross-sectional view taken substantially along line ■-■ in FIG. 1; FIG. FIG. 3 is an enlarged cross-sectional view showing a somewhat exaggerated curve. 10...Multi-plate refiner, 11...Housing, 12
...Input 0.13...Outlet, 14...Axis, 15...Hub,
16-・Key, 17.・Cover plate, 1g-・Bolt, 2
0, 21, 22, 23, 24, 25... rotating disk,
26, 27 @fighter, 28, 39・One end plate, 29・
・Screw, 30, 32, 34, 37, 38° 40... Operating gap, 31, 33, 35, 36... Fixed disk, 41
,42...Flexible membrane plate, 43...Ring, 44...Both sides threaded pin, 45...Nut, 51.58...Flexible link, 52,53,59...Pivot pin, 54.
57...Washer, 55.56...Spacer ring, 60.
・Notch.

Claims (1)

Claims: A housing having an inlet and an outlet for a fiber suspension;
drive means rotatably mounted within the housing; a disintegrating surface disposed for rotation within the housing and imparting a disintegrating action to the fiber suspension as it passes from the inlet to the outlet; a second plurality of refiner disks having a disintegration surface that is interposed between the rotary refiner disks and faces the disintegration surface of the rotary refiner disks along the narrow working gap; a plurality of flexible links interconnecting a disc and said drive means with said rotating refiner disc to rotationally drive said refiner disc, while accommodating axial deflection between said rotating refiner disc and said drive means; Includes multi-plate refiner.