CN2837357Y - Grinding disc for paste mill - Google Patents

Abstract

The utility model discloses a grinding disk for a paste grinding machine, which comprises a rotary grinding disk which is arranged on a main shaft of the paste grinding machine, and a fixed grinding disk which is arranged in the casing body of the paste grinding machine and is matched with the rotary grinding disk, wherein concentric circle barriers are arranged in tooth slots of the rotary grinding disk and the fixed grinding disk, and a return shearing interval is formed between every two concentric circle barriers. More than four concentric circle return shearing intervals are formed on each grinding disk, and the concentric circle barriers of the rotary grinding disk and the fixed grinding disk are arranged alternately. After the rotary grinding disk and the fixed grinding disk are arranged alternately, a single shearing interval is formed between the adjacent concentric circle barriers. The larger the radius is, the smaller the depth of the tooth slots and the width of the single shearing interval are. The bottom of each tooth slot of the rotary grinding disk, which is adjacent to a first concentric circle, is in a shape of an inclined abrupt slope, and the tooth depth of a paste inlet of the rotary grinding disk is maximum. The bottom of each tooth slot inclines the position below the tooth top of the first concentric circle, and the tooth is in a shape of a commutating tooth. The grinding disk for a paste grinding machine, which is provided by the utility model, has the advantages of simple structure, low energy consumption and high paste grinding quality and yield.

Description

The mill that is used for fiberizer

Technical field

The utility model is mainly concerned with the used fiberizer of paper industry field, refers in particular to a kind of mill that is used for fiberizer.

Background technology

In the prior art, refining equipment mainly is jordan (comprising cylindrical and conical) and disc mill (double plate and single-deck), and the latter's application is more extensive.Disc mill again according to the concentration of institute's defibrination material be divided into high dense, in dense and low dense, it is generally acknowledged slurry concentration 5% below for low dense, dense in 5～12%, be that height is dense more than 12%.The concentration height slurry be difficult to enter in the narrow and small mill slot, form so-called " bridge formation " phenomenon, particularly those thicker slurries, this kind phenomenon is even more serious.Thick in the prior art in order to solve, than the problem that the underflow material is difficult for entering slot, made one " fracture area " at the stock inlet of mill, coarse particles enters the correct grinding district of narrow slot again after " fracture area " fragmentation.But the ratio of the shared mill area of this method " fracture area " is very big, and correct grinding district area is greatly reduced, and it is few to cause slurry to improve through " beating degree " (degree of test slurry thickness) behind the grinding machine, and this has just influenced whole structure.Which kind of fiberizer no matter, the retaining dam in its mill slot also is another reason that causes above situation very little.In order to obtain the slurry of height " beating degree ", generally take many grinding machine tandem workings, but being not suitable for pipeline, carries high consistency stock, so high dense grinding machine is not easy to tandem working.Therefore, most of producers all select the high low dense fiberizer of energy consumption for use.Moreover the wide shape slot of the most employings of the groove of mill, this profile of tooth is the easiest phenomenon that causes slurry to stop up slot when refining concentration higher (more than 6%), particularly to those roll flute surface castings more coarse mill and the long situation of pulp fiber, this phenomenon is particularly serious.

For a long time people be devoted to the roll flute shape research to improve refining effect, but ignored an important problem, that is exactly: the hanging amount is inhomogeneous on the whole mill flank of tooth.Because advance to starch radius less, the pulp radius is bigger, slurry moves to the long radius direction after minor radius enters slot, girth constantly increases, this just will inevitably cause the continuous attenuation of slurry, the outlet girth is than reaching more than 3 times that import girth has, and in other words, the slurry thickness in exit has only about 1/3 of import department.But slurry is not a clear water, there is no fear of being evenly distributed in all teeth groove, and is all the more so when particularly concentration is higher.The major part of the slurry that mill is not good fully is slurry group and lumps in addition, and this has just caused a lot of flank of tooth to hang the phenomenon of not starching.Can imagine thus, the mill radius is big more, it is just serious more that its flank of tooth does not have the hanging phenomenon, but the operator has only the pressure that strengthens between two mills for the beating degree that improves slurry, the pressure of the roll flute that hangs up slurry is on a small quantity increased, cause fiber is cut off, a large amount of long fibers have become staple fibre, and the tension intensity that makes into paper descends, and owing to hanging inequality on the whole dish tooth, there are a lot of flank of tooth not hang up slurry, these flank of tooth that do not hang up slurry have caused the direct friction between the metal covering, noise shake ear, the temperature rise of grinding machine outlet slurry, thereby lot of energy changes heat energy and acoustic energy into, caused power consumption serious.

The utility model content

The technical problems to be solved in the utility model just is: at the technical problem that prior art exists, the utility model provide a kind of simple in structure, can reduce the mill that is used for fiberizer that energy consumption can improve defibrination quality and output again.

In order to solve the problems of the technologies described above, the solution that the utility model proposes is: a kind of mill that is used for fiberizer, this mill comprises the rotary grinding disk that is installed on the fiberizer main shaft and is installed on the interior fixed millstone that matches with rotary grinding disk of fiberizer housing, be provided with concentric circles retaining dam in the teeth groove of described rotary grinding disk and fixed millstone, be between a round shear zone between per two concentric circles retaining dam, the concentric circles that every mill is provided with more than 4 comes and goes between the shear zone, the concentric circles retaining dam of rotary grinding disk and fixed millstone alternately shifts to install, cut the interval for simple shear between the concentric circles retaining dam that adjoins mutually after two mills shift to install, tooth depth and simple shear are cut and interval widely all strengthened with radius and diminish gradually, it is characterized in that: the gullet base of the first lap roll flute in the close center of circle is that the abrupt slope is skewed on the described rotary grinding disk, its stock inlet place tooth depth maximum, the straight first lap concentric circles of going up that tilts keeps off the following place of dam tooth top, and profile of tooth is positive profile of tooth.

The roll flute of described mill all becomes 8 °～15 ° angle with the mill diameter line, the thickness of interior tooth top equates between same round shear zone.

Described mill is except that rotary grinding disk import first lap tooth, and big inclination angle at 45 is all made with retaining corner, dam in two ends at the bottom of all the other all teeth.

Compared with prior art, advantage of the present utility model is:

1, the mill that is used for fiberizer of the present utility model strengthens owing to mill advances slurry place tooth depth, reduces gradually along with radius strengthens tooth depth; The interval width of cutting simple shear between the two adjacent concentric circles retaining dams, two mills dislocation back also strengthens with radius and reduces.Like this arrangement can make slurry in the same diameter mill not only the slurry throughput increase but also more shearing number of times arranged, also can make the flank of tooth hanging amount on the whole fluted disc be tending towards even.Stopped not hang up the direct friction between the slurry flank of tooth metal, thereby eliminated operating noise substantially, reduced the temperature of wearing into slurry, increased the service life of mill, greatly reduce the ton slurry power consumption of defibrination operation, owing to can make flank of tooth hanging amount be evenly distributed, under the situation that does not increase pressure between two mills, can eliminate the cutting action of fiber substantially, thereby make the fiber wire-dividing broom purification, the original length that keeps fiber is enhanced to the tension intensity of paper, has reduced the loss of fiber, this defibrination to short stock is very favorable, must strengthen pressure between two mills for long stapled defibrination, and make refining concentration too high, the long stapled cutting action of favourable like this part;

2, the mill that is used for fiberizer of the present utility model is made into commutating tooth with the profile of tooth of rotary grinding disk first lap tooth, so more helps strengthening the front shear effect to slurry, helps the fragmentation of thick slurry, can also simplify the casting technique of mill simultaneously;

3, the teeth groove that is used for the mill rotary grinding disk first lap tooth of fiberizer of the present utility model is widened and the intensification of stock inlet place teeth groove, will help like this than coarse particles and easier the entering in the roll flute groove of slurry of containing the particle in half a lifetime;

4, the mill that is used for fiberizer of the present utility model becomes abrupt slope shape with the bottom land of rotary grinding disk first lap tooth and tilts straight, below first lap concentric circles retaining dam tooth top, locate, like this can be fully with the centrifugal force of slurry in the teeth groove and front pushing spiral to the pressure of slurry under the effect on gullet base inclined-plane, be converted into axial thrust and enter in the first lap teeth groove of fixed millstone after slurry can be ground very soon;

5, the mill that is used for fiberizer of the present utility model since in same diameter mill be multiplied to slurry alternately shear number of times, not only can reduce power that defibrination consumes greatly, and can significantly reduce paper stock power that acceleration consumes;

6, the mill roll flute that mill is all that is used for fiberizer of the present utility model all becomes 10 ° of left and right sides angles and transverse tooth thickness to equate with diameter line, same interval internal spline is widened with radius, help slurry minor radius in teeth groove like this and move freely, eliminated the generation that slurry stops up the slot phenomenon toward the direction of long radius;

7, the mill that is used for fiberizer of the present utility model can make the gullet base two ends corner big oblique angle at 45 between the two concentric circles retaining dam and eliminate normal impact when alternately flowing in the teeth groove of slurry between two mills, enter the kinetic energy that is consumed in the next stage slot process of rotating disk by the blank panel slot thereby reduced again after slurry has entered the dish slot by the rotating disk slot, also just reduced slurry slurry power that acceleration consumes in entering rotating disk next stage slot.

Description of drawings

Fig. 1 is that the master of the utility model rotary grinding disk looks cross-sectional schematic;

Fig. 2 is the side-looking cross-sectional schematic of the utility model rotary grinding disk;

Fig. 3 is the A-A generalized section of first order roll flute on the utility model rotary grinding disk;

Fig. 4 is the front view of the utility model fixed millstone;

Fig. 5 is the cutaway view of the utility model fixed millstone;

Fig. 6 is the generalized section that the utility model is installed on fiberizer.

The specific embodiment

Below with reference to accompanying drawing the utility model is described in further details.

Shown in Fig. 1～6, a kind of mill that is used for fiberizer of the present utility model, this mill comprise rotary grinding disk 1 that is installed on the fiberizer main shaft 3 and the fixed millstone 2 that cooperates with rotary grinding disk 1 that is installed on the fiberizer housing 4.Alternately misplace on the flank of tooth of rotary grinding disk 1 and fixed millstone 2 and be provided with concentric circles retaining dam 5,7, be between a round shear zone between per two concentric circles retaining dam 5,7 on the dish, the concentric circles that the flank of tooth of every mill is provided with more than 4 comes and goes between the shear zone, between two concentric circles retaining dams 5,7 that dislocation is adjoined mutually on the two mill flank of tooth is that a simple shear is cut the interval, simple shear is cut interval width and is strengthened with radius and diminish gradually, the roll flute tooth depth also strengthens with radius and diminishes gradually, and all roll flutes are commutating tooth on rotary grinding disk 1 and the fixed millstone 2.The space width of the first lap roll flute 6 in the close center of circle and this place's import tooth depth all are enlarged to more than the 20mm on the rotary grinding disk 1, and the bottom land of this circle tooth becomes in the inclination directly of abrupt slope, till below the first lap concentric circles retaining dam tooth top.The gullet base two ends of all the other all roll flutes and concentric circles retaining Ba Jiaojiaochu becomes 45 ° big oblique angle on the mill face.Institute's geared surface all becomes 10 ° of left and right sides angles with the mill diameter line, roll flute thickness equates not strengthen with radius to change in the same interval, in preferred embodiment, advance to starch radius and pulp radius simple shear and cut the ratio that the product of the ratio of the ratio of interval width and tooth depth should slightly equal mill external diameter and internal diameter, be provided with like this and just solved whole mill along with radius strengthens the problem that the hanging amount reduces.

The utility model rotary grinding disk first lap roll flute 6 teeth groove widen deepen with import after, thick slurry and half a lifetime particle slurry all be easy to enter in the teeth groove, and improved the throughput of slurry.These first lap roll flute 6 teeth groove become the abrupt slope skewed, help pressure with the centrifugal force that slurry had of teeth groove and pushing spiral effect and change axial compressive force into after by the inclined-plane, after being ground under this pressure effect very soon, coarse particles enters in the first lap teeth groove of fixed millstone 2, and wash away toward the long radius place along teeth groove with inertia always, just can change direction on running into fixed millstone 2 behind the second circle concentric circles retaining dam enters in the rotary grinding disk 1 second circle slot, obtain for the second time the acceleration of centrifugal action again at this slurry, wash away toward the long radius direction always, changing direction after running into concentric circles retaining dam again enters in the fixed millstone 2 second circle teeth groove, so come and go alternate cycles, the chance that slurry can obtain the shearing (i.e. making beating) more than 8 times and rub and rub, this is that traditional any type of fiberizer is incomparable.

Claims (3)

1, a kind of mill that is used for fiberizer, this mill comprises the rotary grinding disk that is installed on the fiberizer main shaft and is installed on the interior fixed millstone that matches with rotary grinding disk of fiberizer housing, be provided with concentric circles retaining dam in the teeth groove of described rotary grinding disk and fixed millstone, be between a round shear zone between per two concentric circles retaining dam, the concentric circles that every mill is provided with more than 4 comes and goes between the shear zone, the concentric circles retaining dam of rotary grinding disk and fixed millstone alternately shifts to install, cut the interval for simple shear between the concentric circles retaining dam that adjoins mutually after two mills shift to install, tooth depth and simple shear are cut and interval widely all strengthened with radius and diminish gradually, it is characterized in that: the gullet base of the first lap roll flute in the close center of circle is that the abrupt slope is skewed on the described rotary grinding disk, its stock inlet place tooth depth maximum, the straight first lap concentric circles of going up that tilts keeps off the following place of dam tooth top, and profile of tooth is positive profile of tooth.

2, the mill that is used for fiberizer according to claim 1 is characterized in that: the roll flute of described mill all becomes 8 °～15 ° angle with the mill diameter line, and the thickness of interior tooth top equates between same round shear zone.

3, the mill that is used for fiberizer according to claim 1 and 2 is characterized in that: described mill is except that import first lap tooth, and two ends all are 45 ° of big inclinations angle with retaining corner, dam at the bottom of all the other all teeth.

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