JPH0146178B2 - - Google Patents

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、被粉砕物をミクロンオーダから10数
ミクロンの微細な粒子に微粉砕する微粉砕機に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pulverizer that pulverizes a material to be pulverized into fine particles ranging from the order of microns to more than 10 microns.

［従来の技術］ 従来、上記微粉砕機としては、例えば特開昭59
−105853号公報所載のものが知られている。この
微粉砕機は、第５図、第６図に示すように、外側
表面に母線と平行にしてかつ方形状の多数の凸部
１を周方向に連続させた円筒状の回転子２を回転
軸３に支持し、この回転子２の外側に微小な間隙
４を存して内側表面に母線と平行にしてかつ三角
形状の多数の凸部５を周方向に連続させた円筒状
の固定子６を嵌装したもので、回転子２と固定子
６との間に形成される粉砕室に被粉砕物を供給
し、回転子２の高速回転により被粉砕物をミクロ
ンオーダから10数ミクロンの微細な粒子に微粉砕
するものである。[Prior art] Conventionally, as the above-mentioned pulverizer, for example,
-The one published in Publication No. 105853 is known. As shown in Figures 5 and 6, this fine grinder rotates a cylindrical rotor 2 that has a large number of rectangular protrusions 1 continuous in the circumferential direction on its outer surface parallel to the generatrix. A cylindrical stator supported on a shaft 3, with a small gap 4 on the outside of the rotor 2, and a large number of triangular convex portions 5 continuous in the circumferential direction on the inner surface parallel to the generatrix. 6 is fitted, the material to be crushed is supplied to the crushing chamber formed between the rotor 2 and the stator 6, and the high speed rotation of the rotor 2 crushes the material to be crushed from the micron order to 10-odd microns. It is pulverized into fine particles.

上記微粉砕機による粉砕は、次のように行われ
る。すなわち、固定子６の上端に連設した上部ケ
ーシング７の周壁に設けた製品排出口８に連なる
吸引送風機（図示せず）の運転により、固定子６
の下端に連設した截頭逆円維管体状の下部ケーシ
ング９の底壁に設けた供給口１０から供給された
被粉砕物（図示せず）を空気と共に機内に吸引
し、回転子２の底壁下面に固設され回転子２と共
に高速回転する撹拌羽根１１によつて生ずる気流
により、下部ケーシング９の内面に沿わせて上昇
させ、回転子２と固定子６との間の粉砕室内に送
り込み、高速回転している回転子２の回転力によ
つて運動エネルギを与えて固定子６に衝突させて
粉砕し、かつ回転子２の凸部１により打撃粉砕
し、更に回転子２の凸部１と固定子６の凸部５と
の間で摩砕させて一層細かく粉砕させながら、回
転子２の高速回転によつて発生した上向きの螺旋
気流に乗せて上方に運んで上部ケーシング７内に
送り出し、これを回転子２の上壁上面に固設され
回転子２と共に高速回転する遠心羽根１２により
上部ケーシング７の内周面に沿わせて回転し、製
品排出口８から機外に出し、図示しないバグフイ
ルタに導入し、ここで製品と空気とが分離され、
空気は吸引送風機を経て大気中に排気され、製品
はバグフイルタからホツパーに送られて貯留され
るものである。 The pulverization by the above-mentioned pulverizer is performed as follows. That is, by operating a suction blower (not shown) connected to a product discharge port 8 provided in the peripheral wall of the upper casing 7 connected to the upper end of the stator 6, the stator 6 is
The material to be crushed (not shown) supplied from the supply port 10 provided in the bottom wall of the lower casing 9 in the shape of a truncated inverted circular vascular tube connected to the lower end is sucked together with air into the machine, and the rotor 2 The airflow generated by the stirring blades 11, which are fixed to the lower surface of the bottom wall and rotate at high speed together with the rotor 2, causes the air to rise along the inner surface of the lower casing 9 and into the grinding chamber between the rotor 2 and the stator 6. It is fed in and given kinetic energy by the rotational force of the rotor 2 rotating at high speed, collides with the stator 6 and crushes it, and is crushed by impact by the convex part 1 of the rotor 2. It is ground between the part 1 and the convex part 5 of the stator 6 to be further finely pulverized, carried upward by the upward spiral airflow generated by the high-speed rotation of the rotor 2, and then transported into the upper casing 7. The product is rotated along the inner circumferential surface of the upper casing 7 by a centrifugal blade 12 fixed on the upper surface of the upper wall of the rotor 2 and rotates at high speed together with the rotor 2, and then discharged from the machine through the product discharge port 8. , introduced into a bug filter (not shown), where the product and air are separated,
Air is exhausted to the atmosphere through a suction blower, and the product is sent from a bag filter to a hopper and stored there.

なお、固定子６の各凸部５は、一辺５ａが回転
子２の中心に向き、他辺５ｂが一辺５ａと45〜60
度の角度をなし、回転子２の回転方向後方が漸次
低くなる三角形状に設けられており、凸部５間に
十字状の凹部５′が形成されている。 In addition, each convex part 5 of the stator 6 has one side 5a facing the center of the rotor 2, and the other side 5b having a 45 to 60 degree angle with the side 5a.
It is provided in a triangular shape that is gradually lowered toward the rear in the rotational direction of the rotor 2, and a cross-shaped recess 5' is formed between the protrusions 5.

又、第５図において１３は固定子６の凸部５間
の凹部５′を塞ぐ分級リングで、粗大粒子が排出
されるのを防止するものであり、凸部５の上部ケ
ーシング７側の端部に着脱可能に設けられてい
る。 Further, in FIG. 5, reference numeral 13 denotes a classification ring that closes the recesses 5' between the protrusions 5 of the stator 6 to prevent coarse particles from being discharged. It is removably installed in the section.

［発明が解決しようとする問題点］ しかしながら、上記従来の微粉砕機によれば、
空気抵抗が多く無駄な動力消費が多いと共に、製
品の粒度分布にばらつきを生ずる問題がある。こ
れらの問題は、固定子６の凹部５′の一部が分級
リング１３によつて塞がれていると共に、回転子
２と固定子６との間の粉砕室内を上昇する気流
（被粉砕物を含む）が撹拌羽根１１および遠心羽
根の回転によつて乱されることにより、脈動など
の乱れが生じ、粉砕室内における粉砕が不安定に
なるためである。[Problems to be solved by the invention] However, according to the above-mentioned conventional pulverizer,
There is a problem that there is a lot of air resistance, a lot of wasted power consumption, and that the particle size distribution of the product varies. These problems are caused by the fact that a part of the concave portion 5' of the stator 6 is blocked by the classification ring 13, and the airflow rising in the crushing chamber between the rotor 2 and the stator 6 (for the objects to be crushed). This is because the rotation of the stirring blade 11 and the centrifugal blade causes disturbances such as pulsation, which makes the grinding in the grinding chamber unstable.

そこで、本発明は、空気抵抗を減少させて動力
消費を有効にし、かつ製品の粒度分布を均一にな
し得るようにした微粉砕機を提供しようとするも
のである。 SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a pulverizer that reduces air resistance, makes power consumption more efficient, and makes it possible to make the particle size distribution of the product uniform.

［問題点を解決するための手段］ 前記問題点を解決するため、本発明は、回転軸
に支持され外側表面に母線と平行な多数の凸部を
周方向に連続させた回転子と、回転子の外側に間
隙を存して嵌装され内側表面に母線と平行な多数
の凸部を周方向に連続させた固定子との間で空気
と共に機内に吸引された被粉砕物を微粉砕する微
粉砕機において、前記回転子の上下端部にコーン
状の突出部を設け、回転子の上方及び下方に形成
される流路の空断面積を回転子から遠去かるにつ
れて大きくなるように設けたものである。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a rotor supported by a rotating shaft and having a plurality of convex portions continuous in the circumferential direction parallel to the generatrix on the outer surface; The material to be crushed is pulverized together with air between the stator and the stator, which is fitted with gaps on the outside of the stator and has a number of protrusions parallel to the generatrix continuous in the circumferential direction on the inside surface. In the pulverizer, cone-shaped protrusions are provided at the upper and lower ends of the rotor, and the empty cross-sectional area of the flow passages formed above and below the rotor increases as the distance from the rotor increases. It is something that

［作用］ 上記手段によれば、機内に吸引された空気（被
粉砕物を含む）は、流路の徐々な縮小によつて圧
縮されながら整流され、その流れを乱されること
なく回転子の下端部の突出部に案内されて粉砕室
に一様に送り込まれ、被粉砕物が定常的な粉砕を
受けて空気と共に粉砕室から送り出された後も、
回転子の上端部の突出部による流路の徐々な拡大
によつて膨張しながら整流され、流れを乱される
ことなく機外に排出される。[Operation] According to the above means, the air sucked into the machine (including the material to be crushed) is compressed and rectified by the gradual reduction of the flow path, and the flow is rectified by the rotor without being disturbed. Even after the material to be crushed is uniformly fed into the crushing chamber guided by the protrusion at the lower end, and is sent out from the crushing chamber together with air after being subjected to steady crushing,
As the flow path gradually expands due to the protrusion at the upper end of the rotor, the flow is rectified while expanding, and the flow is discharged outside the machine without being disturbed.

［実施例］ 以下、本発明の一実施例を第１図、第２図に基
づいて説明する。[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

図において２１は基台２２上に載置されたカツ
プ状の下部ケーシングで、この下部ケーシング２
１の周壁２１ａは截頭逆円錐状の内側表面を有し
ており、下部ケーシング２１の下部側方には、被
粉砕物（図示せず）を空気と共に機内に供給する
供給口２３が設けられている。下部ケーシング２
１の上端には、円筒状の固定子２４が連設されて
おり、固定子２４の内側表面には、母線と平行な
多数の凸部２５が周方向に連続させて設けられて
いる。固定子２４の各凸部２５は、一辺２５ａが
固定子２４の中心に向き、他辺２５ｂが一辺２５
ａと45〜60度の角度をなし、後述する回転子の回
転方向後方が漸次低くなる平断面三角形状に設け
られ、凸部２５の先端には、固定子２４の中心を
曲率中心とする円弧面２５ｃが形成されており、
各凸部２５間には、Ｖ字状の凹部２６が設けられ
ている。そして、固定子２４の上端には、キヤツ
プ状の上部ケーシング２７が連設されている。上
部ケーシング２７の周壁２７ａには、接続方向の
製品排出口２８が設けられており、この製品排出
口２８には、図示しない吸引送風機が連らねられ
ている。 In the figure, 21 is a cup-shaped lower casing placed on a base 22, and this lower casing 2
The peripheral wall 21a of the casing 21 has an inner surface in the shape of a truncated inverted cone, and a supply port 23 is provided at the lower side of the lower casing 21 to supply the material to be crushed (not shown) into the machine together with air. ing. Lower casing 2
A cylindrical stator 24 is connected to the upper end of the stator 1. On the inner surface of the stator 24, a large number of convex portions 25 parallel to the generatrix are provided continuously in the circumferential direction. Each convex portion 25 of the stator 24 has one side 25a facing the center of the stator 24, and the other side 25b facing the side 25.
It forms an angle of 45 to 60 degrees with a, and has a triangular planar cross section that gradually becomes lower in the rotational direction of the rotor, which will be described later. A surface 25c is formed,
A V-shaped recess 26 is provided between each projection 25 . A cap-shaped upper casing 27 is connected to the upper end of the stator 24. A product discharge port 28 in the connection direction is provided in the peripheral wall 27a of the upper casing 27, and a suction blower (not shown) is connected to the product discharge port 28.

前記固定子２４内には、円筒状の回転子２９が
微小な（例えば１mm以下）間隙３０を存して同心
に嵌挿されており、回転子２９は、上下端部を軸
受３１，３２を介して上部ケーシング２７及び基
台２２に支持された回転軸３３に支持されてい
る。基台２２内に突出した回転軸３３の下端部に
は、プーリ３４が取付けられており、このプーリ
３４は、ベルト３５により図示しない電動機と連
動されている。一方、回転子２９の外側表面に
は、母線と平行な多数の凸部３６が周方向に連続
させて設けられている。回転子２９の各凸部３６
は、一辺３６ａが回転子２９の中心、換言すると
固定子２４の中心に向き、他辺３６ｂが一辺３６
ａと45〜60度の角度をなし、回転子２９の回転方
向（第２図における矢印方向）後方が漸次高くな
る平断面三角形状に設けられ、凸部３６の先端に
は、回転子２９の中心を曲率中心とする円弧面３
６ｃが形成されており、各凸部３６間には、Ｖ字
状の凹部３７が設けられている。そして、回転子
２９の上下端部には、コーン状の突出部３８，３
９がそれぞれ設けられており、これらの突出部３
８，３９と上、下部ケーシング２７，２１等とに
よつて回転子２９の上方及び下方に形成される流
路の空断面積は、回転子２９から遠去かるにつれ
て大きくなるように設けられている。 A cylindrical rotor 29 is fitted concentrically into the stator 24 with a minute gap 30 (for example, 1 mm or less) in between. The rotating shaft 33 is supported by the upper casing 27 and the base 22 via the rotary shaft 33 . A pulley 34 is attached to the lower end of the rotary shaft 33 protruding into the base 22, and this pulley 34 is interlocked with an electric motor (not shown) by a belt 35. On the other hand, on the outer surface of the rotor 29, a large number of convex portions 36 parallel to the generatrix are provided continuously in the circumferential direction. Each convex portion 36 of the rotor 29
, one side 36a faces the center of the rotor 29, in other words, the center of the stator 24, and the other side 36b faces the center of the rotor 29.
It forms an angle of 45 to 60 degrees with a, and has a triangular planar cross section that gradually becomes higher at the rear in the direction of rotation of the rotor 29 (in the direction of the arrow in FIG. 2). Arc surface 3 with center of curvature at the center
6c, and a V-shaped recess 37 is provided between each projection 36. Cone-shaped protrusions 38, 3 are provided at the upper and lower ends of the rotor 29.
9 are provided respectively, and these protruding parts 3
The empty cross-sectional area of the flow path formed above and below the rotor 29 by the upper and lower casings 27, 21, etc. is provided so as to increase as the distance from the rotor 29 increases. There is.

なお、固定子２４と回転子２９の凹部２６，３
７の深さは１〜５mm程度である。 Note that the recesses 26 and 3 of the stator 24 and rotor 29
The depth of No. 7 is approximately 1 to 5 mm.

上記構成の微粉砕機においては、電動機及び吸
引送風機を運転すると被粉砕物は、空気と共に機
内に吸引され回転子２９の下端部の突出部３９に
案内されつつ流路の空断面積の漸減によつて流れ
を乱されることなく徐々に絞り込まれ、固定子２
４と回転子２９との間に形成された粉砕室に送り
込まれ、高速回転される回転子２９によつて運動
エネルギを与えられて固定子２４に衝突して粉砕
され、かつ回転子２９の凸部３６によつて打撃粉
砕され、更に固定子２４の凸部２５と回転子２９
の凸部３６との間で摩砕されて一層細かくミクロ
ンオーダから10数ミクロンの大きさの均一な粒度
分布に粉砕されつつ、吸引送風機による吸引と回
転子２９の高速回転とによつて生じた上向きの螺
旋気流に乗つて上部ハウジング２７内に送り出さ
れ、回転子２９の上端部の突出部３８に案内され
つつ流路の空断面積の漸増によつて流れを乱され
ることなく徐々に解放された後、上部ケーシング
２７に沿つて旋回し、製品排出口２８から機外に
排出されて図示しないバグフイルタに導入され、
ここで製品と空気が分離され、空気は吸引送風機
を経て大気中に排気され、製品はバグフイルタか
らホツパーに送られて貯留される。 In the pulverizer configured as described above, when the electric motor and suction blower are operated, the material to be pulverized is sucked into the machine together with air and guided to the protrusion 39 at the lower end of the rotor 29, while the empty cross-sectional area of the flow path gradually decreases. As a result, the flow is gradually narrowed down without being disturbed, and the stator 2
4 and the rotor 29, and is given kinetic energy by the rotor 29 which is rotated at high speed, collides with the stator 24 and is crushed, and the convexity of the rotor 29 is The convex portion 25 of the stator 24 and the rotor 29 are crushed by impact by the portion 36.
The particles are ground between the convex portions 36 and further finely pulverized into a uniform particle size distribution ranging from the micron order to several tens of microns. The air is sent into the upper housing 27 on the upward spiral airflow, and is gradually released without being disturbed by the gradual increase in the empty cross-sectional area of the flow path while being guided by the protrusion 38 at the upper end of the rotor 29. After that, the product rotates along the upper casing 27, is discharged from the machine through the product discharge port 28, and is introduced into a bag filter (not shown).
Here, the product and air are separated, the air is exhausted to the atmosphere via a suction blower, and the product is sent from the bag filter to the hopper where it is stored.

したがつて、従来のように分級リング１３によ
る大きな空気抵抗及び撹拌羽根１１などによる気
流の乱れを受けることがないので、脈動などの乱
れが生じることなく、粉砕室における粉砕が安定
化（定常化）する。 Therefore, unlike conventional systems, the large air resistance caused by the classification ring 13 and the disturbance of the airflow caused by the stirring blades 11, etc. are not encountered, so the grinding in the grinding chamber is stabilized (steady state is achieved) without disturbances such as pulsation. )do.

なお、上述した実施例においては、固定子２４
と回転子２９の凸部２５，３６を共に三角形状と
したがこれに限らず、例えば第３図に示すよう
に、固定子２４′と回転子２９′の凸部２５′，３
６′をそれぞれ方形状としたり、あるいは第４図
に示すように、共に方形状をなす固定子２４″と
回転子２９″の凸部２５″，３６″のうち、回転子
２９″の凸部３６″を回転子２９″に埋設した平板
によつて形成してもよく、若しくは従来の微粉砕
機のように固定子の凸部を三角形状とし、回転子
の凸部を方形状としてもよい。 In addition, in the embodiment described above, the stator 24
Although the protrusions 25 and 36 of the stator 24' and the rotor 29' are both triangular in shape, the shape is not limited to this. For example, as shown in FIG.
6' are each square-shaped, or as shown in FIG. 36'' may be formed by a flat plate embedded in the rotor 29'', or the convex portion of the stator may be triangular and the convex portion of the rotor may be square, as in a conventional pulverizer. .

［発明の効果］ 以上のように本発明によれば、機内に吸引され
た空気（被粉砕物を含む）が回転子の下端部の突
出部に案内されつつ流路空断面積の漸減によつて
圧縮されながら整流され、流れを乱されることな
く粉砕室に一様に送り込まれ、被粉砕物が定常的
な粉砕を受けて粉砕室から空気と共に送り出され
た後も、回転子の上端部の突出部に案内されつつ
流路空断面積の漸増によつて膨張しながら整流さ
れ、流れを乱されることなく機外に排出されるの
で、従来のように大きな空気抵抗及び無駄な動力
消費が生じることなく、機内における流れ及び粉
砕が安定し、かつ製品の粒度分布を均一にするこ
とができる。[Effects of the Invention] As described above, according to the present invention, the air (including the material to be crushed) sucked into the machine is guided to the protrusion at the lower end of the rotor and is gradually reduced in the air cross-sectional area of the flow path. The flow is rectified while being compressed, and the flow is uniformly fed into the grinding chamber without being disturbed. Guided by the protruding part of the flow path, the flow is expanded and rectified by the gradual increase in the air cross-sectional area of the flow path, and the flow is discharged outside the machine without being disturbed. The flow and pulverization within the machine are stable, and the particle size distribution of the product can be made uniform.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例を示す微粉砕機の縦
断面図、第２図は第１図における−線に沿つ
た一部拡大断面図、第３図、第４図はそれぞれ要
部の他実施例の一部拡大断面図、第５図は従来の
微粉砕機の縦断面図で、第６図は第５図における
−線に沿つた一部拡大断面図である。 ２４，２４′，２４″……固定子、２５，２５′，
２５″……凸部、２６……凹部、２９，２９′，２
９″……回転子、３０……間隙、３３……回転軸、
３６，３６′，３６″……凸部、３７……凹部、３
８，３９……突出部。 Fig. 1 is a longitudinal sectional view of a pulverizer showing an embodiment of the present invention, Fig. 2 is a partially enlarged sectional view taken along the - line in Fig. 1, and Figs. 3 and 4 are main parts, respectively. FIG. 5 is a longitudinal sectional view of a conventional pulverizer, and FIG. 6 is a partially enlarged sectional view taken along the line - in FIG. 5. 24, 24', 24''...Stator, 25, 25',
25″... Convex portion, 26... Concave portion, 29, 29', 2
9″...rotor, 30...gap, 33...rotating shaft,
36, 36', 36''... Convex portion, 37... Concave portion, 3
8, 39... Protrusion.

Claims (1)

【特許請求の範囲】[Claims] １ 回転軸に支持され外側表面に母線と平行な多
数の凸部を周方向に連続させた回転子と、回転子
の外側に間隙を存して嵌装され内側表面に母線と
平行な多数の凸部を周方向に連続させた固定子と
の間で空気と共に機内に吸引された被粉砕物を微
粉砕する微粉砕機において、前記回転子の上下端
部にコーン状の突出部を設け、回転子の上方及び
下方に形成される流路の空断面積を回転子から遠
去かるにつれて大きくなるように設けたことを特
徴とする微粉砕機。1. A rotor that is supported by a rotating shaft and has a number of protrusions parallel to the generatrix on its outer surface continuous in the circumferential direction, and a rotor that is fitted with gaps on the outside of the rotor and has a number of protrusions parallel to the generatrix on its inner surface. In a pulverizer that pulverizes a material to be pulverized that is sucked into the machine together with air between a stator having convex portions continuous in the circumferential direction, cone-shaped protrusions are provided at the upper and lower ends of the rotor, A pulverizer characterized in that the empty cross-sectional area of the channels formed above and below the rotor increases as the distance from the rotor increases.