JPH08999Y2 - Hammer mill - Google Patents
Hammer millInfo
- Publication number
- JPH08999Y2 JPH08999Y2 JP1625692U JP1625692U JPH08999Y2 JP H08999 Y2 JPH08999 Y2 JP H08999Y2 JP 1625692 U JP1625692 U JP 1625692U JP 1625692 U JP1625692 U JP 1625692U JP H08999 Y2 JPH08999 Y2 JP H08999Y2
- Authority
- JP
- Japan
- Prior art keywords
- hammer
- opening
- crushed
- rotation
- hammer mill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Crushing And Pulverization Processes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案はハンマーミル、特に製品
の粒度を左右する下部のグレート５の形状に係る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hammer mill, and more particularly to the shape of a lower grate 5 which affects the grain size of a product.
【０００２】[0002]
【従来の技術】石炭や岩石などを使用に適した粒度に破
砕するのに広く用いられているのがハンマーミルであっ
て、その一般的な構造は図２に示すように、ケーシング
１の中で水平に軸支されたロータ３が高速で回転し、こ
のロータの円周に配設されたハンマー４が、投入口２か
ら落下してくる被砕物Ｍを撥ね飛ばし上部の反撥板６と
衝突させて破砕し、破砕されて落下してくる被砕物Ｍは
ハンマーの回転軌道の下半部とグレート５の上面との空
隙へ押し込まれてグレート５の開口部から円周の外側へ
排出される。したがって破砕される被砕物Ｍの粒度は、
グレート５の目幅によって決められる。2. Description of the Related Art A hammer mill is widely used for crushing coal, rock, etc. to a particle size suitable for use, and its general structure is shown in FIG. The rotor 3 supported horizontally at high speed rotates at a high speed, and the hammer 4 arranged on the circumference of this rotor repels the crushed object M falling from the input port 2 and collides with the repulsion plate 6 on the upper side. The crushed object M is crushed, and the crushed object M that is crushed and dropped is pushed into the gap between the lower half of the rotary orbit of the hammer and the upper surface of the great 5 and discharged from the opening of the great 5 to the outside of the circumference. . Therefore, the particle size of the crushed object M is
Determined by the width of the Great 5 scale.
【０００３】このようにグレート５の開口部の目幅は製
品の品質を決定付ける重要な要素であるが、開口部のう
ちで一番内面に当る部分、すなわち開口面（当り面）に
おいてはハンマーの高速回転による被砕物Ｍの押し込み
力が大きいから被砕物Ｍは強力に開口部に押し込まれる
が、開口部の内部へ進むにつれて、この押し込み力は衰
えて被砕物Ｍの排出が鈍化し、そのために付着しやすい
石炭など水分を含むような被砕物Ｍを破砕する場合に
は、グレート５に目詰りを起こし円滑な製品の排出を妨
げ、作業の上で大きな障害となる。この課題を解決する
ために従来から改善が試みられ、例えば図３に示す実公
平３ー３１４０９号公報が見られる。この技術は図のよ
うにグレート５ａの開口部をハンマーの回転方向に中心
線Ｃが傾斜した末広がりの形状にするとともに、前記の
回転方向の側面５２ａに拡大した段差５４ａを設けたも
のである。この結果、開口部の開口面は従来と同様であ
るから、被砕物Ｍの擂り潰し効果は低下することなく、
所望の粒度が確保できるとともに、ハンマーの回転力を
開口部における粉砕物の排出力として有効に転用、増大
でき、かつ、末広がりの形状と拡大段差によって、排出
抵抗が効果的に大幅に低減されて開口部における目詰り
や閉塞を防止し、生産性の向上に大いに貢献したと謳っ
ている。As described above, the opening width of the opening of the grate 5 is an important factor that determines the quality of the product, but the innermost portion of the opening, that is, the opening surface (contact surface), is a hammer. Since the pushing force of the object to be crushed M due to the high speed rotation of the object to be crushed is strong, the object to be crushed M is strongly pushed into the opening. In the case of crushing the crushed object M containing water such as coal that tends to adhere to the clogs, the grate 5 is clogged, which hinders smooth product discharge, which is a major obstacle in the work. In order to solve this problem, improvement has been attempted conventionally, and for example, Japanese Utility Model Publication No. 3-31409 shown in FIG. 3 can be seen. In this technique, as shown in the figure, the opening of the grate 5a is formed in a divergent shape in which the center line C is inclined in the rotational direction of the hammer, and an enlarged step 54a is provided on the side surface 52a in the rotational direction. As a result, since the opening surface of the opening is the same as the conventional one, the crushing effect of the object to be crushed M does not decrease,
The desired particle size can be secured, the rotational force of the hammer can be effectively diverted and increased as the discharge force of the pulverized material at the opening, and the discharge resistance is effectively significantly reduced due to the shape of the flared end and the enlarged step. It claims that it contributed to the improvement of productivity by preventing clogging and blockage at the opening.
【０００４】[0004]
【考案が解決しようとする課題】ここに示した従来技術
は確かに目詰りの防止に有効であると判断できるが、一
方、別の課題が残されている。それはグレート５ａの開
口部にはハンマーの高速回転に伴う激しい押し付け力が
加わるが、その中でもハンマーの回転方向に直面した側
面５２ａに大部分の負荷が集まり、通過する被砕物Ｍと
の強い擦過を受けて苛酷な摩耗条件に曝された状態に置
かれる。この状態の中でも開口部の開口面に近い側面が
最も厳しい条件に置かれるのは当然であり、グレート５
ａの回転方向の側面５２ａの上方はこの条件のため摩耗
が集中して急激にすり減らされ、その結果、開口部の開
口面は広がり段差は消滅してただの平面と化してしま
う。開口面の目幅が広がるということは、開口部を通過
する被砕物Ｍの粒径も大きくなるということを意味し、
予定とは違った粒度分布の製品しか得られないという課
題が出てくるのである。また、この摩耗したグレート５
ａを取り替えるためには煩瑣な作業が必要となり、その
間ハンマーミルの稼働を停止となければならないから、
生産性の阻害要因として無視し難い問題である。Although it can be judged that the conventional technique shown here is effective in preventing clogging, there are still other problems. A strong pressing force is applied to the opening of the grate 5a due to the high-speed rotation of the hammer, but most of the load is concentrated on the side surface 52a facing the direction of rotation of the hammer, which causes strong rubbing with the passing object M. Received and placed under conditions of severe wear. It is natural that the side of the opening close to the opening surface is placed under the most severe conditions in this state.
Due to this condition, wear concentrates on the upper side of the side surface 52a in the rotational direction of a and is rapidly worn away. As a result, the opening surface of the opening widens and the step disappears to become a flat surface. The widening of the mesh width of the opening surface means that the particle size of the object to be crushed M passing through the opening also becomes large,
The problem is that only products with a particle size distribution different from what was planned can be obtained. Also, this worn Great 5
Since complicated work is required to replace a, the operation of the hammer mill must be stopped during that time.
This is a problem that cannot be ignored as a factor that impedes productivity.
【０００５】本考案は以上に述べた課題を解決するため
に、グレートの開口部の目詰りを防ぐと共に、そのため
に派生する製品粒度の不安定化を防止する新しいハンマ
ーミルの提供を目的とする。In order to solve the above-mentioned problems, the present invention aims to provide a new hammer mill which prevents clogging of the opening of the grate and prevents destabilization of the product grain size resulting therefrom. .
【０００６】[0006]
【課題を解決するための手段】本考案に係るハンマーミ
ルは、ケーシング１の上方に被砕物Ｍを供給する投入口
２を具え、該ケーシング１内で高速回転するロータ３の
分割した円周上で均等に配設した複数個のハンマー４を
揺動自在に係着し、該ロータ３回転軌道の下半部に沿
い、規則的に開口するグレート５よりなり、該グレート
５の開口部断面はハンマーの回転方向へ傾斜した中心線
を有して該中心線から対称に外側へ向って拡大する両側
面からなり、さらに回転の逆方向の側面５３に拡大した
段差５４を具えたことによって前記の課題を解決した。A hammer mill according to the present invention has a charging port 2 for supplying an object to be crushed M above a casing 1, and a rotor 3 rotating at a high speed in the casing 1 has a divided circumference. A plurality of hammers 4 which are evenly arranged are swingably engaged with each other, and the hammer 5 is composed of a grate 5 which is regularly opened along the lower half part of the rotation path of the rotor 3. The hammer has a center line inclined in the direction of rotation and has both side surfaces symmetrically extending outward from the center line, and further has an enlarged step 54 on the side surface 53 in the opposite direction of rotation. Solved the problem.
【０００７】[0007]
【作用】ケーシング内でハンマーに撥ね飛ばされ粉砕さ
れ下方へ落下してきた被砕物Ｍは、ハンマーの回転軌道
の下半部を中心として溜まり、回転するハンマーによっ
てグレート５との間で挟まれ、擂り潰されつつ開口部の
上面から開口部の中へ強制的に押し込まれ送り出され
る。当然、回転方向の側面５２には従来の技術と同様に
摩耗作用が働くが、ここには段差がないから摩耗作用は
回転方向の側面５２の全面で受けとめ、被砕物Ｍは通過
の途中で流れに変化を受ける事なく開口部の中で回転方
向の側面５２と均等に圧接しながら進行し、末広がりの
形状によりハンマーの押し付け力が次第に低下してきて
も、空隙の断面積が次第に増加し通過に対する抵抗が進
む程小さくなっていくので、目詰りが起こり難い作用を
発現する。一方、グレート５開口部のハンマー回転の逆
方向の側面５３については、その途中に段差が設けられ
ているが、この面はハンマーの回転する方向から見れば
逆方向であり、ハンマーの押し付け力は回転方向の側面
５２に比べると遥かに小さいため、摩耗作用もほとんど
働かず段差５４があるにも拘らず長く稼働してもこの段
差が摩耗のために消滅してしまうまでにはなかなか至ら
ない。したがって開口部の目幅が急に大きくなることが
なく、ここを通過できる被砕物Ｍの粒径も急に変らず安
定した粒度を保った粉砕物が得られる。The object to be crushed, which has been crushed by the hammer in the casing, crushed and dropped downwards, is collected around the lower half of the rotation path of the hammer and is sandwiched between the rotating hammer and the grate 5. While being crushed, it is forcibly pushed into the opening from the upper surface of the opening and sent out. Naturally, the side surface 52 in the rotation direction has a wear action as in the conventional technique, but since there is no step here, the wear action is received by the entire surface of the side face 52 in the rotation direction, and the object to be crushed M flows during the passage. In the opening, the cross-sectional area of the air gap increases gradually even if the pushing force of the hammer gradually decreases due to the shape of the diverging shape. Since the resistance becomes smaller as the resistance progresses, a function that does not easily cause clogging is exhibited. On the other hand, a step is provided in the middle of the side surface 53 of the opening of the grate 5 in the direction opposite to the rotation of the hammer. Since it is much smaller than the side surface 52 in the rotation direction, even if the abrasion effect is hardly exerted and there is a step 54, even if it is operated for a long time, it is difficult for the step to disappear due to abrasion. Therefore, the mesh width of the opening does not suddenly increase, the particle size of the object to be crushed M that can pass through the opening does not change suddenly, and a crushed product having a stable particle size can be obtained.
【０００８】[0008]
【実施例】ハンマーミル全体の構造は、図２に示した従
来のものと特に変わるところはないので詳しい説明は省
略する。図１は本考案の実施例の一つを示し、ケーシン
グ内において水平に支持され図示しないモータによって
高速に回転する回転軸３１と、この回転軸に固着して共
回りするロータ３、このロータ３の円周へ揺動自在に取
付けられたハンマー４、このハンマー４と所定の間隔を
おいて回転の軌道に沿った円弧状に配列されたグレート
５を示している。グレート５の開口部にはハンマーの回
転方向と一定の傾斜角を形成する中心線Ｃを有し、両側
面は末広がりに相互の距離を広げて目幅の断面積を次第
に大きくしている。そして、開口部を形成している両側
面のうち、ハンマーの回転方向の側面５２は平滑な平面
でできているが、ハンマー回転の逆方向の側面５３は段
差５４を設けて、開口部内のある線からは内側へ退入し
た屈折した表面を形成して、目詰りや閉塞を防止する。
しかもこの回転の逆方向の側面５３は回転方向の側面５
２とは違って、ハンマーの回転によって生じる激しい摩
耗作用をほとんど受けないから、長い期間使用しても摩
耗のために段差が消滅するような懸念が少ない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the entire hammer mill is the same as that of the conventional one shown in FIG. FIG. 1 shows one embodiment of the present invention, in which a rotating shaft 31 that is horizontally supported in a casing and is rotated at a high speed by a motor (not shown), a rotor 3 that is fixedly attached to the rotating shaft, and rotates together, 2 shows a hammer 4 swingably attached to the circumference of the circle, and a grate 5 arranged in an arc shape along a trajectory of rotation at a predetermined distance from the hammer 4. The opening of the grate 5 has a centerline C that forms a constant inclination angle with the rotational direction of the hammer, and the side surfaces gradually widen toward each other to gradually increase the cross-sectional area of the eye width. Of the two side surfaces forming the opening, the side surface 52 in the rotation direction of the hammer is made of a smooth flat surface, but the side surface 53 in the opposite direction of the hammer rotation is provided with a step 54 and is inside the opening. The line forms a refracted surface that retreats inward to prevent clogging and blockage.
Moreover, the side surface 53 in the opposite direction of the rotation is the side surface 5 in the rotation direction.
Unlike No. 2, it is hardly affected by the severe wear caused by the rotation of the hammer, so there is little concern that the step will disappear due to wear even if it is used for a long period of time.
【０００９】[0009]
【考案の効果】本考案に係るハンマーミルは、以上に述
べたとおりハンマーの回転方向に対して傾斜した中心線
を有し、かつ、目幅が末広がりの開口部を具え、開口部
のある線からは外部に向って拡大する段差を付けている
ので、開口部の中で排出力の減退する後半に排出の抵抗
が著るしく低下してこれを補うので、被砕物Ｍが目詰り
することもなく円滑な作業が連続して可能となる。さら
にグレート５の耐用期間に悪い影響を及ぼすこともな
く、従来に比べて取り替えの周期も長くなるので、年間
を通じた生産性もきわめて向上することができる。As described above, the hammer mill according to the present invention has the center line inclined with respect to the rotation direction of the hammer, and has the opening with the widening of the mesh width. Since there is a step that expands toward the outside, the resistance of discharge remarkably decreases in the latter half of the period when the discharge force decreases in the opening, and this is compensated for, so the crushed object M is clogged. Without this, smooth work can be performed continuously. Furthermore, the life of the GREAT 5 is not adversely affected, and the replacement cycle is longer than in the conventional case, so that the productivity throughout the year can be significantly improved.
【図１】本考案の実施例を示す部分的な縦断面図であ
る。FIG. 1 is a partial vertical sectional view showing an embodiment of the present invention.
【図２】ハンマーミルの全体を示す縦断面図である。FIG. 2 is a vertical sectional view showing the entire hammer mill.
【図３】従来技術を示す部分的な縦断面図である。FIG. 3 is a partial vertical sectional view showing a conventional technique.
１ ケーシング ２ 投入口 ３ ロータ ４ ハンマー ５ グレート ６ 反撥板 51 開口部 52 回転方向の側面 53 回転の逆方向の側面 54 段差 Ｃ 段差の中心線 Ｍ 被砕物 1 Casing 2 Input Port 3 Rotor 4 Hammer 5 Great 6 Repulsion Plate 51 Opening 52 Side of Rotation 53 Side of Opposite Rotation 54 Step C Centerline of Step M Mash
Claims (1)
る投入口２を具え、該ケーシング１内で高速回転するロ
ータ３の分割した円周上で均等に配設した複数個のハン
マー４を揺動自在に係着し、該ロータ３の回転軌道の下
半部に沿い、規則的に開口するグレート５よりなるハン
マーミルにおいて、該グレート５の開口部断面はハンマ
ーの回転方向へ傾斜した中心線Ｃを有して該中心線から
対称に外側へ向って拡大する両側面からなり、さらにハ
ンマー回転の逆方向の側面５３に外側へ拡大した段差５
４を具えたことを特徴とするハンマーミル。1. A plurality of hammers 4 provided with an input port 2 for supplying a material to be crushed M above a casing 1 and arranged evenly on a divided circumference of a rotor 3 rotating at a high speed in the casing 1. In a hammer mill composed of a great 5 which is swingably engaged and which opens regularly along the lower half of the rotation path of the rotor 3, the cross section of the opening of the great 5 has a center inclined in the rotational direction of the hammer. A step 5 which has a line C and which is symmetrical with respect to the center line and expands outwardly, and further expands outward on the side surface 53 in the opposite direction of the hammer rotation.
A hammer mill characterized by having 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1625692U JPH08999Y2 (en) | 1992-02-18 | 1992-02-18 | Hammer mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1625692U JPH08999Y2 (en) | 1992-02-18 | 1992-02-18 | Hammer mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0567332U JPH0567332U (en) | 1993-09-07 |
| JPH08999Y2 true JPH08999Y2 (en) | 1996-01-17 |
Family
ID=11911489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1625692U Expired - Lifetime JPH08999Y2 (en) | 1992-02-18 | 1992-02-18 | Hammer mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08999Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5567398B2 (en) * | 2010-05-31 | 2014-08-06 | 遠藤工業株式会社 | Crusher |
-
1992
- 1992-02-18 JP JP1625692U patent/JPH08999Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0567332U (en) | 1993-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |