WO2007048321A1 - Piece de disque pour broyeur a attrition - Google Patents

Piece de disque pour broyeur a attrition Download PDF

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Publication number
WO2007048321A1
WO2007048321A1 PCT/CN2006/002718 CN2006002718W WO2007048321A1 WO 2007048321 A1 WO2007048321 A1 WO 2007048321A1 CN 2006002718 W CN2006002718 W CN 2006002718W WO 2007048321 A1 WO2007048321 A1 WO 2007048321A1
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WIPO (PCT)
Prior art keywords
grinding disc
disc
tooth
grinding
teeth
Prior art date
Application number
PCT/CN2006/002718
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English (en)
French (fr)
Inventor
Yongsheng Chen
Yu Chen
Original Assignee
Changsha Zhengda Hi-Tech Paper Machinery Co., Ltd.
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Publication date
Application filed by Changsha Zhengda Hi-Tech Paper Machinery Co., Ltd. filed Critical Changsha Zhengda Hi-Tech Paper Machinery Co., Ltd.
Publication of WO2007048321A1 publication Critical patent/WO2007048321A1/zh

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills
    • D21D1/306—Discs

Definitions

  • the invention relates mainly to the field of refiners used in the papermaking industry, in particular to a grinding disc for a refiner.
  • the refining equipment is mainly a refiner (including cylindrical and conical) and a disc refiner (double disc and single disc), and the latter is more widely used.
  • the disc mill is further divided into high-concentration, medium-concentration and low-concentration according to the concentration of the slurry to be ground. It is generally considered that the slurry concentration is low concentration below 5%, medium concentration in 5 ⁇ 12%, and high concentration in 12% or more.
  • the high concentration of the slurry is difficult to enter into the narrow groove of the grinding disc, forming a so-called "bridge" phenomenon, especially for the thicker slurry, which is more serious.
  • the tooth flutes of the grinding disc mostly adopt the equal-width tooth gap. This tooth shape is most likely to cause the slurry to block the tooth gap when the refining concentration is higher (6% or more), especially for the surface grinding of those grinding teeth. This phenomenon is particularly serious when the rough disc and the pulp fibers are long.
  • the inlet pitch radius is small and the blade pitch radius is large, the slurry moves toward the large radius after entering the tooth gap at a small radius, and the circumference is continuously increased, which inevitably causes the slurry to become thinner and thinner.
  • the outlet circumference is longer than the inlet circumference. It can be more than 3 times longer, that is to say, the thickness of the slurry at the exit is only about 1/3 of the inlet.
  • the slurry is not clean water and cannot be evenly distributed in all the alveolar grooves, especially at higher concentrations.
  • the present invention provides a A grinding disc for a refiner that is simple in construction, reduces energy consumption, and improves the quality and yield of the paddle.
  • the solution proposed by the present invention is: a grinding disc for a refiner, the grinding disc comprising a rotating grinding disc mounted on a refiner spindle and a rotating grinding disc mounted in the refiner housing a matching grinding disc, a concentric circular dam is arranged in the tooth groove of the rotating grinding disc and the fixed grinding disc, and a round-trip shearing interval is arranged between each two concentric circular dams, and more than 4 concentrics are arranged on each grinding disc
  • the concentric circular dams of the rotating grinding disc and the fixed grinding disc are alternately dislocated, and the concentric circular dams adjacent to each other after the misalignment of the two grinding discs are single shearing intervals, and the depth of the cogging and the width of the single shearing interval are both It gradually becomes smaller as the radius increases, and is characterized in that: the bottom of the tooth groove of the first ring grinding tooth on the rotating grinding disc near the circle 'heart is steeply inclined
  • the grinding teeth of the grinding disc are at an angle of 8° to 15° with respect to the diameter line of the grinding disc, and the thickness of the crests in the same reciprocating shearing section is equal.
  • the grinding discs are made with a 45° large inclination angle at both ends of the bottom of the grinding disc and the corner of the dam.
  • the grinding disc for the refiner of the present invention has a deeper tooth depth as the grinding disc advances, and the tooth depth gradually decreases with increasing radius; a single shear between two adjacent concentric circular dams after the dislocation of the two grinding discs The width of the interval also decreases as the radius increases.
  • This arrangement allows the slurry to increase not only the throughput of the slurry but also the number of shears in the same diameter disc, and the amount of the tooth surface on the entire toothed disc tends to be uniform. Eliminate the direct friction between the metal of the tooth surface without the slurry, thus basically eliminating the noise during operation, reducing the temperature of the grinding slurry, increasing the service life of the grinding disc, and greatly reducing the slurry consumption of the refining process.
  • the fiber cutting effect can be basically eliminated without increasing the pressure between the two grinding discs, so that the fiber is separated, the original length of the fiber is maintained, and the fiber is strengthened.
  • the tensile strength of the paper reduces the loss of fiber. This is very advantageous for the refining of short fiber pulp.
  • the pressure between the two grinding discs must be increased, and the refining concentration should not be too high. This is advantageous for the cutting action of a part of the long fibers;
  • the grinding disc for the refiner of the present invention makes the tooth shape of the first ring of the rotating grinding disc into a positive tooth, which is more advantageous for strengthening the front shearing action on the slurry, which is beneficial to the crushing of the coarse pulp, and at the same time Casting process of simple honing disc;
  • the groove of the first ring of the grinding wheel of the refiner of the present invention is widened and the groove of the first ring is deepened, which is advantageous for the coarser slurry and the slurry containing the semi-granular particles to enter more easily. Grinding groove; :.
  • the grinding disc for the refiner of the present invention turns the bottom of the first ring of the rotating grinding disc into a steep slope and straightens up to the top of the concentric circular dam of the first ring, so that the slurry in the cogging can be fully
  • the centrifugal force and the pressure of the front pusher spiral on the slurry are converted into axial thrust under the action of the slope of the bottom of the tooth groove, so that the slurry can be quickly ground and then enter Inside the first ring of the grinding disc;
  • the grinding disc for the refiner of the present invention increases the number of alternate shearing of the slurry by doubled in the same diameter grinding disc, which not only greatly reduces the power consumed by the refining, but also greatly reduces the acceleration of the paper material. Power consumption;
  • the grinding disc for the refiner of the present invention has all the grinding teeth of the grinding disc at an angle of about 10° with the diameter line and the tooth thickness is equal, so that the cogging in the same section can be widened as the radius increases, so that It is beneficial to the movement of the slurry in the direction of the large radius in the direction of the large radius in the tooth groove, thereby eliminating the occurrence of the phenomenon of blockage of the slurry;
  • the grinding disc for a refiner of the present invention has a 45° angle at the corners of the bottom ends of the cogging between the two concentric dams to enable the slurry to alternately flow in the slots between the two discs. Eliminating the vertical collision, thereby reducing the kinetic energy consumed by the slurry from the tooth gap of the turntable into the tooth gap of the disk and then entering the turn of the lower stage by the empty disk tooth gap, thereby reducing the slurry entering the turntable The power consumed by the slurry acceleration in the primary tooth gap.
  • Figure 1 is a front cross-sectional view showing the rotating grinding disc of the present invention
  • Figure 2 is a side cross-sectional view showing the rotating grinding disc of the present invention.
  • Figure 3 is a cross-sectional view showing the first stage grinding teeth of the rotating grinding disc of the present invention.
  • Figure 4 is a front elevational view of the fixed grinding disc of the present invention.
  • Figure 5 is a cross-sectional view of the fixed grinding disc of the present invention.
  • Figure 6 is a schematic cross-sectional view of the present invention installed in a refiner
  • a grinding disc for a refiner comprising a rotating grinding disc 1 mounted on a refiner spindle 3 and mounted on a refiner housing 4 and rotating
  • the grinding disc 1 is matched with the fixed grinding disc 2.
  • the tooth surface of the rotating grinding disc 1 and the fixed grinding disc 2 are alternately dislocated with a concentric circular dam 5, 7. between each two concentric circular dams 5, 7.
  • On a circular shearing interval each grinding disc There are more than four concentric circular shearing sections on the tooth surface.
  • the two concentric circular dams 5 and 7 adjacent to each other on the tooth surface of the two grinding discs are in a single shearing interval.
  • the width of the single shearing interval varies with As the radius increases, it gradually becomes smaller, and the tooth depth of the grinding tooth gradually decreases with the increase of the diameter.
  • All the grinding teeth on the rotating grinding disc 1 and the fixed grinding disc 2 are positive teeth.
  • the tooth groove width of the first ring grinding tooth 6 on the rotating grinding disc 1 near the center of the circle and the depth of the inlet tooth at this point are increased to more than 20 , and the groove bottom of the ring tooth is inclined obliquely upward until the first circle concentric circular dam Below the top of the tooth. At the corner of the bottom of the tooth groove of all the grinding teeth on the grinding disc surface, it is at a corner of the concentric circular dam, which becomes a large oblique angle of 45°.
  • All tooth flanks are at an angle of about 10° to the diameter of the disc diameter.
  • the thickness of the grindstone in the same section does not vary with the radius.
  • the shear radius and the rake radius are single sheared.
  • the product of the ratio of the interval width to the ratio of the depth of the cogging should be slightly equal to the ratio of the outer diameter of the grinding disc to the inner diameter. This arrangement solves the problem that the entire grinding disc increases the amount of pulp with the radius. 02718
  • the first ring grinding tooth of the rotating grinding disc of the invention 6 After the tooth groove is widened and the inlet is deepened, both the coarse pulp and the semi-granular slurry can easily enter the tooth gap, and the throughput of the pulp is also improved.
  • the tooth groove of the first ring is inclined to a steep slope, which is favorable for converting the centrifugal force of the slurry of the tooth groove and the pressure of the pushing screw to the axial pressure through the inclined surface, so that the coarse slurry acts at this pressure. It is quickly ground and then enters the first ring of the fixed grinding disc 2, and is rushed along the tooth gap to the large radius by inertia until it hits the second circle of concentric circular dam on the fixed grinding disc 2.

Description

用于磨浆机的磨盘
技术领域
本发明主要涉及到造纸行业所用磨浆机领域， 特指一种用于磨浆机的磨盘。
背景技术
现有技术中， 磨浆设备主要是精浆机 （包括圆柱形和圆锥形）和盘磨机（双盘和单 盘）， 而后者的应用更为广泛。 盘磨机又根据所磨浆料的浓度分为高浓、 中浓和低浓， 一般认为浆料浓度在 5%以下为低浓， 5〜12%中浓， 12%以上为高浓。 浓度高了浆料很难 进入狭小的磨盘齿缝内， 形成所谓的 "架桥"现象， 特别是那些较粗的浆料， 此种现象 更为严重。 现有技术中为了解决较粗、 较浓浆料不易进入齿缝的问题， 在磨盘的进浆口 制造了一个 "破碎区"， 粗桨料经 "破碎区"破碎后， 再进入狭窄齿缝的精磨区。 但此 法 "破碎区"所占磨盘面积的比例很大， 使精磨区面积大为减少， 造成浆料经过磨机后 "叩解度"（检测浆料粗细的程度）提高不多， 这就影响了整体效果。 无论哪种磨浆机， 其磨盘齿缝中的挡坝太少， 也是造成以上情况的另一原因。 为了获得高 "叩解度 "的浆 料， 一般采取多台磨机串联工作， 但高浓浆料不适宜管道输送， 所以高浓磨机不便于串 联工作。 因此， 大多数厂家都选用能耗高的低浓磨浆机。 再者磨盘的齿纹多数采用等宽 形齿缝， 这种齿形在磨浆浓度较高 （6%以上） 时最易造成浆料堵塞齿缝的现象， 特别是 对那些磨齿表面铸造较粗糙的磨盘和浆料纤维较长的情况， 这种现象尤为严重。
长期以来人们致力于磨齿形状的研究以提高磨浆效果， 却忽略了一个重要的问题， 那就是： 整个磨盘齿面上挂浆量不均匀。 因为进桨半径较小， 出桨半径较大， 浆料在小 半径进入齿缝后向大半径方向运动， 周长不断增加， 这就必然会造成浆料不断变薄， 出 口周长比进口周长有的可达 3倍以上， 就是说， 出口处的浆料厚度只有进口处的 1/3左 右。但是浆料不是清水，不可能会均匀分布在所有齿槽内，特别是浓度较高时更是如此。 另外未完全磨好的浆料的大部分是浆团和 块， 这就造成了很多齿面挂不上桨的现象。 由此可想象， 磨盘半径越大， 其齿面无挂浆现象就越严重， 但操作工人为了提高浆料的 叩解度只有加大两磨盘之间的压力， 这样就容易使少量挂上浆料的磨齿的压强增大， 造 成把纤维剪断， 大量长纤维变成了短纤维， 使成纸的拉力强度下降， 且 于整个盘齿上 挂浆不均， 有很多齿面没有挂上浆料， 这些没有挂上浆料的齿面造成了金属面之间的直 接摩擦， 噪音震耳， 磨机出口浆温升高， 因而大量的能量转变为热能和声能， 导致了耗 电严重。
发明内容
本发明要解决的技术问题就在于： 针对现有技术存在的技术问题， 本发明提供一种 结构简单、 既能减少能量消耗又能提高磨桨质量和产量的用于磨浆机的磨盘。
为了解决上述技术问题， 本发明提出的解决方案为： 一种用于磨浆机的磨盘， 该磨 盘包括安装于磨浆机主轴上的转动磨盘和安装于磨桨机壳体内的与转动磨盘相配合的 定磨盘， 所述转动磨盘和定磨盘的齿槽内设有同心圆挡坝， 每两个同心圆挡坝之间为一 往返剪切区间， 每块磨盘上设有 4个以上的同心圆往返剪切区间， 转动磨盘与定磨盘的 同心圆挡坝交替错位设置， 两磨盘错位设置后相毗邻的同心圆挡坝之间为单剪切区间， 齿槽深和单剪切区间宽均随半径加大而逐渐变小， 其特征在于： 所述转动磨盘上靠近圆' 心的第一圈磨齿的齿槽底部为陡坡倾斜状， 其进浆口处齿深最大， 倾斜直上到第一圈同 心圆挡坝齿顶以下处， 齿形均为正齿形。
所述磨盘的磨齿都与磨盘直径线成 8°〜15°的夹角， 同一往返剪切区间内齿顶的厚 度相等。
所述磨盘除转动磨盘进口第一圈齿以外， 其余所有齿底两端与挡坝转角处都制成 45°大倾斜角。
与现有技术相比， 本发明的优点在于：
1、 本发明的用于磨浆机的磨盘由于磨盘进浆处齿深加大， 随着半径加大齿深逐渐 减小； 两磨盘错位后两相邻同心圆挡坝之间的单剪切区间宽度亦随半径加大而减小。 这 样排列可使浆料在相同直径磨盘内不但浆料通过量增加而且有更多的剪切次数，还会使 整齿盘上的齿面挂浆量趋于均匀。 杜绝了未挂上浆料齿面金属之间的直接摩擦， 从而基 本消除了运行中的噪音， 降低了磨成浆的温度， 增加了磨盘的使用寿命， 大大降低了磨 浆工序的吨浆耗电， 由于能使得齿面挂浆量分布均匀， 在不增加两磨盘之间压力的情况 下， 可基本消除了纤维的切断作用， 从而使纤维分丝帚化， 保持纤维的本来长度， 增强 成纸的拉力强度， 减少了纤维的流失， 这对短纤维桨料的磨浆是非常有利的， 对于长纤 维的磨浆必须加大两磨盘之间的压力， 并且使磨浆浓度不要太高， 这样有利部分长纤维 的切断作用；
2、 本发明的用于磨浆机的磨盘将转动磨盘第一圈齿的齿形制作成正齿， 这样更有 利于加强对浆料的正面剪切作用， 有利于粗浆的破碎， 同时还能简佧磨盘的铸造工艺；
3、本发明的用于磨浆机的磨盘转动磨盘第一圈齿的齿槽加宽和进浆口处齿槽加深, 这样将有利于较粗浆料和含有半生颗粒的浆料更容易进入磨齿槽内； ：.
4、 本发明的用于磨浆机的磨盘将转动磨盘第一圈齿的槽底成为陡坡形倾斜直上， 直至第一圈同心圆挡坝齿顶以下处，这样能充分将齿槽内浆料的离心力和前面推料螺旋 对浆料的压力在齿槽底部斜面的作用下，转化为轴向推力而使桨料能很快磨碎后进入定 磨盘的第一圈齿槽内；
5、 本发明的用于磨浆机的磨盘由于在同一直径磨盘内的成倍增加了对浆料的交替 剪切次数， 不但能大大降低磨浆所耗动力， 而且能大大减少纸料加速所耗动力；
6、本发明的用于磨浆机的磨盘将磨盘所有的磨齿都与直径线成 10°左右夹角而且齿 厚相等， 这样能使同一区间内齿槽随半径加大而加宽， 这样有利于浆料在齿槽内小半径 往大半径的方向运动自如， 消除了浆料堵塞齿缝现象的发生；
7、 本发明的用于磨浆机的磨盘将两同心圆挡坝之间的齿槽底部两端拐角处成 45° 大斜角能使浆料在两磨盘之间的齿槽内交替流动时消除垂直碰撞， 从而减少了浆料由转 盘齿缝进入完盘齿缝后再由空盘齿缝进入转盘的下一级齿缝过程中所消耗的动能， 也就 减少了浆料在进入转盘下一级齿缝中浆料加速度所耗动力。
附图说明
图 1是本发明转动磨盘的主视剖视示意图；
图 2是本发明转动磨盘的侧视剖视示意图；
图 3是本发明转动磨盘上第一级磨齿的 Α-Α剖面示意图；
图 4是本发明定磨盘的主视图；
图 5是本发明定磨盘的剖视图。
图 6是本发明安装于磨浆机的剖面示意图
具体实施方式
以下将结合附图对本发明做进一步详细说明。
如图 1〜6所示，本发明的一种用于磨浆机的磨盘，该磨盘包括安装于磨浆机主轴 3 . 上的转动磨盘 1和安装于磨浆机壳体 4上的与转动磨盘 1配合的定磨盘 2。 转动磨盘 1 和定磨盘 2的齿面上交替错位设有同心圆挡坝 5、 7，.盘上每两个同心圆挡坝 5、 7之间. 为一往返剪切区间， 每块磨盘的齿面上设有 4个以上的同心圆往返剪切区间， 两磨盘齿 面上错位相毗邻的两个同心圆挡坝 5、 7之间为一单剪切区间， 单剪切区间的宽度随半 径加大而逐渐变小， 磨齿齿深也随 径加大逐渐变小， 转动磨盘 1和定磨盘 2上所有磨 齿均为正齿。转动磨盘 1上靠近圆心的第一圈磨齿 6的齿槽宽度和该处进口齿深都加大 至 20瞧以上， 该圈齿的槽底成陡坡倾斜直上， 直至第一圈同心圆挡坝齿顶以下为止。 磨盘面上其余所有磨齿的齿槽底部两端与同心圆挡坝交角处， 成为 45°的大斜角。 所有 齿面都与磨盘直径线成 10°左右夹角，同一区间内磨齿厚度相等并不随半径加大有变化， 在较佳的实施例中，进浆半径处和出浆半径处单剪切区间宽度的比值与齿槽深的比值之 乘积应略等于磨盘外径与内径的比值，这样设置就解决了整个磨盘随着半径加大挂浆量 02718
-4- 减少的问题。
本发明转动磨盘第一圈磨齿 6齿槽加宽和进口加深后， 无论粗浆和半生颗粒浆料都 很容易进入齿槽内， 而且也提高了浆嵙的通过量。 此第一圈磨齿 6齿槽成陡坡倾斜状， 有利于将齿槽的浆料所具有的离心力和推料螺旋作用的压力通过斜面后转变为轴向压 力， 使粗浆料在此压力作用下很快磨碎后进入定磨盘 2的第一圈齿槽内， 并且凭着惯性 一直沿着齿槽往大半径处冲去，直至碰上定磨盘 2上第二圈同心圆挡坝后才会改变方向 进入转动磨盘 1第二圈齿缝中， 在此桨料又第二次获得离心力作用的加速， 一直往大半 径方向冲去， 当碰上同心圆挡坝后又改变方向进入定磨盘 2第二圈齿槽中， 如此往返 交替循环， 浆料可以获得 8次以上的剪切 （即打桨） 和摩擦揉搓的机会， 这是传统的任 何形式的磨浆机所无法比拟的。

Claims

权 利 要 求
1、 一种用于磨浆机的磨盘， 该磨盘包括安装于磨浆机主轴上的转动磨盘和安装于 磨浆机壳体内的与转动磨盘相配合的定磨盘，所述转动磨盘和定磨盘的齿槽内设有同心 圆挡坝， 每两个同心圆挡坝之间为一往返剪切区间， 每块磨盘上设有 4个以上的同心圆 往返剪切区间， 转动磨盘与定磨盘的同心圆挡坝交替错位设置， 两磨盘错位设置后相毗 邻的同心圆挡坝之间为单剪切区间， 齿槽深和单剪切区间宽均随半径加大而逐渐变小， 其特征在于： 所述转动磨盘上靠近圆心的第一圈磨齿的齿槽底部为陡坡倾斜状， 其进浆 口处齿深最大， 倾斜直上到第一圈同心圆挡坝齿顶以下处， 齿形均为正齿形。
2、 根据权利要求 1所述的用于磨浆机的磨盘， 其特征在于： 所述磨盘的磨齿都与 磨盘直径线成 8°〜15°的夹角， 同一往返剪切区间内齿顶的厚度相等。
3、 根据权利要求 1或 2所述的用于磨桨机的磨盘， 其特征在于： 所述磨盘除进口 第一圈齿以外， 其余所有齿底两端与挡坝转角处都为 45°大倾斜角。
PCT/CN2006/002718 2005-10-24 2006-10-16 Piece de disque pour broyeur a attrition WO2007048321A1 (fr)

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EP2562307A1 (en) 2011-08-26 2013-02-27 Officine Airaghi Srl Spare parts for disc refiners for the production of paper

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Publication number Priority date Publication date Assignee Title
ITVR20100165A1 (it) * 2010-08-06 2012-02-07 Airaghi S R L Off Parte di ricambio per raffinatori a dischi per la produzione di carta
US8870109B2 (en) 2010-08-06 2014-10-28 Officine Airaghi S.R.L. Spare part for disc refiners for the production of paper
EP2562307A1 (en) 2011-08-26 2013-02-27 Officine Airaghi Srl Spare parts for disc refiners for the production of paper

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