CN1285801C

CN1285801C - Attrition mill

Info

Publication number: CN1285801C
Application number: CN 200410045082
Authority: CN
Inventors: 陈永生; 陈瑜
Original assignee: CHANGSHA ZHENGDAQINGKE PAPER INDUSTRY EQUIPMENT Co Ltd
Current assignee: CHANGSHA ZHENGDAQINGKE PAPER INDUSTRY EQUIPMENT Co Ltd
Priority date: 2004-07-23
Filing date: 2004-07-23
Publication date: 2006-11-22
Anticipated expiration: 2024-07-23
Also published as: CN1598132A

Abstract

The present invention discloses a pulping machine which is formed by orderly connecting a grinding disc part, a transmission part and a motor, wherein the grinding disc part is installed in a machine casing, and the machine casing and the transmission part are both installed on a machine base; the grinding disc part comprises a rotary grinding disc and a fixed grinding disc matched with the rotary grinding disc; the rotary grinding disc is installed on the main transmission shaft of the transmission part, and the fixed grinding disc is installed at the inner wall of the machine casing; the transmission part mainly comprises a main shaft, a bearing seat, a drive coupler and a driven coupler; the tooth surface of the rotary grinding disc and the tooth surface of the fixed grinding disc are provided with concentric shield dams, a region is formed between every two concentric shield dams, each grinding disc is provided with three or more concentric regions, the width of the regions is gradually reduced with the enlargement of the radius, and the tooth depth of grinding teeth is also gradually reduced with the enlargement of the radius; an inclined acute angle is formed between the working surface of the first circle grinding teeth close to the circle center on the rotary grinding disc and the plane surface of the grinding disc. The present invention can overcome the defects of the prior art and can achieve the effects of high efficiency and low consumption.

Description

Fiberizer

Technical field

The present invention relates generally to field of papermaking, refers in particular to a kind of 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 is divided into high dense and low dense again according to the concentration of institute's defibrination material, it is generally acknowledged that slurry concentration being to hang down densely 5% below, is that height is dense more than 5%.The concentration height slurry be difficult to enter in the narrow and small mill slot, form so-called " bridge formation " phenomenon, particularly those thicker this kind of slurry phenomenons are even more serious.In order to solve the problem that is difficult for entering slot than coarse particles, made one " fracture area " at the stock inlet of mill in the prior art, 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 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.High dense and low dense grinding machine no matter, the retaining dam of 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%), and particularly those roll flutes surfaces cast more coarse mill, and 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, 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, and grinding machine outlet slurry temperature is very high, thereby lot of energy changes heat energy and acoustic energy into, caused power consumption serious.

Summary of the invention

The technical problem to be solved in the present invention just is: at the technical problem that prior art exists, the invention provides a kind of simple in structure, with low cost, can reduce energy consumption and improve the fiberizer of pulp quality and output.

In order to solve the problems of the technologies described above, the solution that the present invention proposes is: a kind of fiberizer, and it comprises mill part, running part and the motor that links to each other successively, and mill partly is installed in the casing, and casing and running part all are installed on the support; Mill partly comprises rotary grinding disk and the fixed millstone that cooperates with rotary grinding disk, rotary grinding disk is installed on the final drive shaft of running part, fixed millstone is installed on casing inner wall, described running part mainly comprises main shaft, bearing block, active shaft coupling and driven shaft coupling, driven shaft coupling is installed on the main shaft, driven shaft coupling is sheathed in the active shaft coupling, initiatively shaft coupling links to each other with motor shaft, it is characterized in that: the flank of tooth of described rotary grinding disk and fixed millstone is provided with concentric circles retaining dam, per two concentric circles retaining is an interval between the dam, every mill is provided with the concentric circles interval more than 3 or 3, interval width strengthens with radius and diminishes gradually, and the roll flute tooth depth also strengthens with radius and diminishes gradually; First lap roll flute and mill plane near the center of circle on the rotary grinding disk form acute rake angle.

It also comprises an enrichment facility, this enrichment facility comprises a stock inlet end cap and a conical shell, the stock inlet end cap is connected with the big end of conical shell, screen cylinder is loaded in the shell, the inwall of screen cylinder and shell forms an annular compartment, the chamber below offers a delivery port, and the delivery port place is equipped with a valve, and the rear end of shell is connected with the housing of fiberizer.Described screen cylinder is fixed in the junction of stock inlet end cap and shell.Described screen cylinder is conical.The front end of the stock inlet end cap of described enrichment facility is circular, and the rear end is square.

First lap roll flute and mill plane formation acute rake angle near the center of circle on the described rotary grinding disk are the 40-50 degree.It is 25mm that described mill roll flute advances slurry place tooth depth, and tooth depth strengthens with radius and diminishes gradually.

Offer several semi-circular groove on the described active shaft coupling inwall, offer in the bottom of groove and the circular hole of half slot, on the outer wall of driven shaft coupling, offer the half slot that matches with first circular trough of active shaft coupling with radius.With compliant pin transferring power in half slot, compliant pin is limited by the back-up ring of active coupling end-face, thereby has avoided hitting back and forth of it.

Compared with prior art, the invention has the advantages that:

1. the enrichment facility that possesses of the present invention self, do not need to set up in addition other concentrators, helical feed and screw feed equipment, not only reduced the loss of energy but also reduced floor space, and simple in structure, with low cost, make simple, the trouble point is few, give to produce or maintenance offers convenience.

2. the first lap roll flute working face of rotating disk is made with the mill plane and become acute rake angle, be subjected to the effect of centrifugal force and axial thrust when making slurry enter rotating disk so simultaneously, therefore enter very soon after pressing slurry to grind by the inclined teeth inclined-plane fixedly in the mill first interval slot, play a part traditional mill fracture area, and much thinner than the slurry after traditional mill fracture area.

3. strengthen owing to mill advances slurry place tooth depth, and reduce gradually with radius increasing tooth depth; The distance of advancing again between the two concentric circles retaining dam, slurry place also reduces gradually with the radius increasing, can solve the uneven problem of hanging on the whole mill flank of tooth so substantially, stop the direct friction between the mill metal flank of tooth, thereby eliminated the operating noise of grinding machine, reduced the temperature of wearing into slurry, increase the service life of mill, reduced the ton slurry power consumption of defibrination operation.Owing to can make flank of tooth hanging amount be evenly distributed, thereby reduced unit pressure, substantially eliminate the flank of tooth intermetallic direct friction and therefore stopped the cutting action of fiber, thereby make the fiber wire-dividing broom purification to greatest extent, the original length that keeps fiber, be enhanced to the tension intensity of paper, reduced the loss of fiber.

4. use mill of the present invention can increase slurry and alternately shear number of times, increased the beating degree of separate unit fiberizer, improved the defibrination quality by two mill roll flutes.

5. the present invention has strengthened the width and the degree of depth (surpassing 20mm) of the one-level slot (stock inlet) of rotary grinding disk, avoided high consistency stock " bridge formation " phenomenon at import slot place, also help the half a lifetime pulp particle simultaneously and enter slot, thereby improve the throughput of slurry, the defibrination output of unit interval is greatly improved.

6. the phenomenon that shaft coupling of the present invention can effectively avoid driven shaft coupling metal claw fracture and compliant pin to damage easily occurs.

Description of drawings

Fig. 1 is the generalized section of fiberizer of the present invention;

Fig. 2 is the structural representation of enrichment facility of the present invention;

Fig. 3 is that the master of rotary grinding disk of the present invention looks generalized section;

Fig. 4 is the A-A generalized section of first order roll flute on the rotary grinding disk of the present invention;

Fig. 5 is the side-looking generalized section of rotary grinding disk of the present invention;

Fig. 6 is that the master of fixed millstone of the present invention looks generalized section;

Fig. 7 is the side-looking generalized section of fixed millstone of the present invention;

Fig. 8 is the initiatively schematic side view of shaft coupling of the present invention;

Fig. 9 is that the master of the present invention's active shaft coupling looks schematic diagram;

Figure 10 is the schematic side view of the driven shaft coupling of the present invention;

Figure 11 is that the master of the driven shaft coupling of the present invention looks schematic diagram.

The specific embodiment

Below with reference to accompanying drawing the present invention is described in further details.

As shown in Figure 1, a kind of fiberizer of the present invention, it comprises that successively mill part, running part and motor are formed by connecting, and the mill part is installed in the casing 5 with screw, and casing 5 all is installed on the support 6 with screw with running part; Mill partly comprises rotary grinding disk 1 and the fixed millstone 2 that cooperates with rotary grinding disk 1, rotary grinding disk 1 is installed on the main shaft 31 of running part, fixed millstone 2 is installed on casing 5 inwalls, described running part mainly comprises main shaft 31, bearing block 32, active shaft coupling 33 and driven shaft coupling 34, driven shaft coupling 34 is installed on the main shaft 31, driven shaft coupling 34 is sheathed in the active shaft coupling 33, and initiatively shaft coupling 33 links to each other with the motor shaft of motor 4.

Extremely shown in Figure 7 as Fig. 3, the flank of tooth of described rotary grinding disk 21 and fixed millstone 22 is provided with concentric circles retaining dam 212,221, per two concentric circles retaining is an interval between the dam 212,221, every mill is provided with the concentric circles interval more than 3 or 3, interval width strengthens with radius and diminishes gradually, and the roll flute tooth depth also strengthens with radius and diminishes gradually; The working face of the first lap roll flute 211 in the close center of circle and mill plane form acute rake angle on the rotary grinding disk 21.First lap roll flute 211 near the center of circle on the described rotary grinding disk 21 is the 40-50 degree with mill plane formation acute rake angle.It is 25mm that described mill roll flute advances slurry place tooth depth, and tooth depth strengthens with radius and diminishes gradually.

Referring to Fig. 1 and Fig. 2, this fiberizer also comprises an enrichment facility, this enrichment facility comprises that one is connected with the large port of conical shell 13 with stock inlet end cap 12 that stock inlet 11 is connected as a single entity, screen cylinder 14 is loaded in the conical shell 13, screen cylinder 14 forms an annular compartment 15 with the inwall of shell 13, chamber 15 belows offer a delivery port 16, and delivery port 16 places are equipped with a valve 17, and the rear end of shell 13 is connected with the housing of fiberizer 5 usefulness screws.

As shown in Figs. 8 to 11, initiatively offer several semi-circular groove 331 on shaft coupling 33 inwalls, offer and the circular hole 332 of half slot 331 in the bottom of groove 331 with radius, on the outer wall of driven shaft coupling 34, offer the half slot 341 that matches with active shaft coupling 33 first circular troughs 331, with compliant pin transferring power in half slot 331,341, compliant pin is limited by the back-up ring of active shaft coupling 33 end faces, thereby has avoided hitting back and forth of it.

In preferred embodiment, the working face of the first lap roll flute in the 21 close centers of circle and mill plane formation acute rake angle is 45 degree on the rotary grinding disk; Concentric circles retaining dam 212,221 dislocation of rotary grinding disk 21 and fixed millstone 22 are arranged alternately and make the whole mill flank of tooth be divided into eight defibrination shear zones.

During fiberizer work, slurry is sent here the stock inlet end cap 11 that tangentially enters enrichment facility by stock pump, utilize the kinetic energy of slurry stream itself in screen cylinder 14, to do the screw line rotation, the centrifugal force that utilizes rotation to produce makes the de-watering of slurries enrichment again, the water that leaches by screen cylinder 14 enters annular cavity 15 backs by delivery port 16 discharges, delivery port 16 is adorned a valve 17, is used for regulating slurry and enters the optimum concentration in mill district (the design is maximum concentration 8%).The slurry stream direction of rotation screen cylinder 14 in and grinding machine rotary grinding disk 21 can utilize like this and starch the blade that the part kinetic energy that flows enters rotary grinding disk 21 in the same way, reach the part purpose of energy saving.Slurry is subjected to the acceleration of moment after entering the rotor blade spacing, be subjected to the centrifugal force of blade and the residual compression that stock pump is sent here, make slurry enter the first concentric circles interval of rotary grinding disk 21 roll flutes synchronously, because interval roll flute spacing is more than 20mm, the degree of depth is also more than 20mm, the slurry that concentration is big can not produce " bridge formation " phenomenon in so big import department, and enters smoothly in the mill district.The working face of rotary grinding disk 21 first interval roll flutes 211 becomes acute rake angle (between 35 °-50 ° with the mill plane, the angle of most preferred embodiment of the present invention is 45 °), after entering between the helical teeth, slurry rotated centrifugal force simultaneously and by the effect of axial thrust two power of the ramp effect of tooth and enter in the first interval slot between two concentric circles of fixed millstone 22.Exist in the time of because of inertia force and pressure, slurry can wash away rapidly along outer circular direction, runs into just can change behind second concentric circles retaining dam 221 in the slot that direction enters rotary grinding disk 21 roll flutes second interval.At this moment, slurry is subjected under the dial rotation action of centrifugal force, washes away toward the outer circular direction of rotating disk, just changes again behind second concentric circles retaining dam 212 of running into rotating disk roll flute 21 in second interval that direction pours fixed millstone 22 roll flutes.Like this 4 cycles of alternate cycles, slurry obtains the chance shearing (i.e. making beating) and rub totally for 8 times, and this is that traditional any type of fiberizer is all incomparable.

Claims

1, a kind of fiberizer, it comprises mill part, running part and the motor that links to each other successively, and mill partly is installed in the casing, and casing and running part all are installed on the support; Mill partly comprises rotary grinding disk and the fixed millstone that cooperates with rotary grinding disk, rotary grinding disk is installed on the main shaft of running part, fixed millstone is installed on casing inner wall, described running part mainly comprises main shaft, bearing block, active shaft coupling and driven shaft coupling, driven shaft coupling be installed on the main shaft and kink in the active shaft coupling, initiatively shaft coupling links to each other with motor shaft, it is characterized in that: the flank of tooth of described rotary grinding disk and fixed millstone is provided with concentric circles retaining dam, per two concentric circles retaining is an interval between the dam, every mill is provided with the concentric circles interval more than 3 or 3, interval width strengthens with radius and diminishes gradually, and the roll flute tooth depth also strengthens with radius and diminishes gradually; First lap roll flute working face and mill plane near the center of circle on the rotary grinding disk form acute rake angle.

2, fiberizer according to claim 1, it is characterized in that: it also comprises an enrichment facility, this enrichment facility comprises a stock inlet end cap and a conical shell, the stock inlet end cap is connected with the big end of conical shell, screen cylinder is loaded in the shell, and the inwall of screen cylinder and shell forms an annular compartment, and the chamber below offers a delivery port, the delivery port place is equipped with a valve, and the rear end of shell is connected with the housing of fiberizer.

3, fiberizer according to claim 2 is characterized in that: described screen cylinder is fixed in the junction of stock inlet end cap and conical shell.

4, according to claim 2 or 3 described fiberizers, it is characterized in that: described screen cylinder is for conical.

5, according to claim 2 or 3 described fiberizers, it is characterized in that: the front end of the stock inlet end cap of described enrichment facility is for circular, and the rear end is square.

6, fiberizer according to claim 1 is characterized in that: first lap roll flute working face and mill plane formation acute rake angle near the center of circle on the described rotary grinding disk are 40～50 degree.

7, fiberizer according to claim 1 is characterized in that: it is 1.6 times of pulp place tooth depth that described mill roll flute advances slurry place tooth depth.

8, fiberizer according to claim 1, it is characterized in that: offer several semi-circular groove on the described active shaft coupling inwall, offer and the circular hole of this half slot in the bottom of groove, on the outer wall of driven shaft coupling, offer the half slot that matches with first circular trough of active shaft coupling with radius.