JPH0567332U - Hammer mill - Google Patents

Hammer mill

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Publication number
JPH0567332U
JPH0567332U JP1625692U JP1625692U JPH0567332U JP H0567332 U JPH0567332 U JP H0567332U JP 1625692 U JP1625692 U JP 1625692U JP 1625692 U JP1625692 U JP 1625692U JP H0567332 U JPH0567332 U JP H0567332U
Authority
JP
Japan
Prior art keywords
hammer
opening
rotation
grate
crushed
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.)
Granted
Application number
JP1625692U
Other languages
Japanese (ja)
Other versions
JPH08999Y2 (en
Inventor
滋 辰已
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kurimoto Ltd
Original Assignee
Kurimoto Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kurimoto Ltd filed Critical Kurimoto Ltd
Priority to JP1625692U priority Critical patent/JPH08999Y2/en
Publication of JPH0567332U publication Critical patent/JPH0567332U/en
Application granted granted Critical
Publication of JPH08999Y2 publication Critical patent/JPH08999Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

(57)【要約】 【目的】 ハンマーミルの粉砕物がグレートから排出さ
れるときの目詰りを防止する。 【構成】 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を有してこの中心線から対称に
外側へ向って拡大する両側面からなり、さらにハンマー
の回転の逆方向の側面53に外側へ拡大した段差54を
具えている。 【効果】 グレートの開口部目幅が末広がりになってい
る上、中心線がハンマーの回転方向へ傾斜しているので
目詰りが起こり難い。また、開口部内の段差は摩耗の受
けにくい側面に設けられているから、開口部の入り口の
目幅が広がり難く、粉砕物の粒度に急な変化が起り難
い。
(57) [Summary] [Purpose] To prevent clogging of hammer grinds when discharged from the grate. [Structure] The opening cross section of the grate 5 is composed of both side surfaces that have a center line C inclined in the rotation direction of the hammer and symmetrically expand outward from this center line. The side surface 53 has a step 54 that expands outward. [Effect] Since the opening of the grate has a wide opening and the center line is inclined in the direction of rotation of the hammer, clogging is less likely to occur. In addition, since the step inside the opening is provided on the side surface that is less likely to be worn, it is difficult to widen the width of the entrance of the opening, and it is difficult for the particle size of the crushed product to change suddenly.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

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。 The present invention relates to a hammer mill, and more particularly to the shape of the lower grate 5 that affects the grain size of the product.

【0002】[0002]

【従来の技術】[Prior Art]

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。 A hammer mill is widely used for crushing coal or rock to a particle size suitable for use, and its general structure is, as shown in Fig. 2, a horizontal shaft support in a casing 1. Rotated rotor 3 rotates at high speed, and hammer 4 arranged on the circumference of this rotor repels the crushed object M falling from input port 2 and collides it with repulsion plate 6 on the upper side to crush it. The crushed and falling crushed object M is pushed into the gap between the lower half of the rotary orbit of the hammer and the upper surface of the grate 5 and discharged from the opening of the grate 5 to the outside of the circumference. Therefore, the grain size of the crushed object M is determined by the mesh width of the grate 5.

【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 great 5 is an important factor that determines the quality of the product, but in the portion of the opening that is the innermost surface, that is, the opening surface (contact surface). Since the pushing force of the crushed object M by the high-speed rotation of the hammer is large, the crushed object M is strongly pushed into the opening, but as it goes into the opening, the pushing force decreases and the discharge of the crushed object M slows down. Therefore, when crushing a crushed material M such as coal that easily adheres to water, the Great 5 is clogged, which hinders smooth product discharge, which is a major obstacle to 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. According to 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 is not reduced, and the desired particle size can be secured, and the rotational force of the hammer is crushed in the opening. It can be effectively diverted and increased as the discharging force of the material, and the shape of the diverging end and the enlarged step height effectively reduce the discharging resistance to prevent clogging and blockage at the opening and improve productivity. It claims to have contributed greatly.

【0004】[0004]

【考案が解決しようとする課題】[Problems to be solved by the device]

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5a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5a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 technology shown here is effective in preventing clogging, there is still another problem. The strong pressing force is applied to the opening of the great 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. Therefore, it is exposed to severe wear conditions. In this state, it is natural that the side surface of the opening close to the opening surface is placed under the most severe condition, and above the side surface 52a in the rotating direction of the great 5a, wear is concentrated due to this condition, and the wear is sharply abraded. As a result, the opening surface of the opening widens and the step disappears to become a flat surface. The widening of the opening width means that the particle size of the object to be crushed M that passes through the opening also increases, and the problem that only products with a particle size distribution different from the planned one can be obtained. It comes out. Further, in order to replace the worn grate 5a, a complicated work is required, and the operation of the hammer mill must be stopped during that time, which 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 that prevents clogging of the opening of the grate and prevents destabilization of the product particle size resulting from that. To do.

【0006】[0006]

【課題を解決するための手段】[Means for Solving the Problems]

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。 The hammer mill according to the present invention comprises an input port 2 for supplying an object M to be crushed above a casing 1, and a plurality of rotors 3 rotating at a high speed in the casing 1 are provided with a plurality of them arranged evenly on the divided circumference. A hammer 4 is swingably attached to the rotor 3 and is composed of a grate 5 which is regularly opened along the lower half of the rotation path of the rotor 3. The cross section of the opening of the grate 5 is a center line inclined in the rotational direction of the hammer. The above-mentioned problem is solved by having a stepped portion 54 which is formed symmetrically outward from the center line and has an enlarged step 54 on the side surface 53 in the opposite direction of rotation.

【0007】[0007]

【作用】[Action]

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 to-be-crushed object M, which has been smashed by the hammer in the casing and crushed and dropped downward, accumulates around the lower half of the rotation path of the hammer, is sandwiched between the rotating hammer and the Great 5, and is crushed. While being pushed, it is forcibly pushed into the opening from the upper surface of the opening and sent out. Naturally, the side surface 52 in the rotating direction has the same wear action as in the conventional technique, but since there is no step here, the wear action is received by the entire side surface 52 in the rotating direction, and the object M to be crushed during the passage. The flow proceeds evenly in contact with the side surface 52 in the direction of rotation in the opening without any change in the flow, and even if the pushing force of the hammer gradually decreases due to the shape of the end spread, the cross-sectional area of the void gradually increases. As the resistance to passage increases, it becomes smaller, and the effect that clogging is less likely to occur is exhibited. On the other hand, there is a step in the middle of the side surface 53 of the opening of the grate 5 in the opposite direction of the hammer rotation, but this surface is the opposite direction when viewed from the direction of rotation of the hammer, and the pressing force of the hammer Is much smaller than the side surface 52 in the direction of rotation, so even if there is a step 54 and the step 54 runs for a long time despite the fact that the step of wear does not work, it is difficult for the step to disappear due to wear. Absent. Therefore, the opening width does not suddenly increase, and the particle size of the object to be crushed M that can pass through the opening does not change abruptly, and a crushed product having a stable particle size can be obtained.

【0008】[0008]

【実施例】【Example】

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52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。 The structure of the entire hammer mill is the same as that of the conventional one shown in FIG. 2, and therefore its detailed description is omitted. FIG. 1 shows one embodiment of the present invention, in which a rotating shaft 31 which is horizontally supported in a casing and is rotated at a high speed by a motor (not shown), a rotor 3 fixedly attached to the rotating shaft, and a rotor 3 which rotates together. It shows a hammer 4 swingably attached to the circumference of the circle, and a grate 5 arranged in an arc shape along the orbit of rotation at a predetermined distance from the hammer 4. The opening of the Great 5 has a centerline C that forms a certain angle of inclination with the direction of rotation of the hummer, and both sides widen toward each other, gradually increasing 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, while the side surface 53 in the opposite direction of the hammer rotation is provided with a step 54 so that the side surface in the opening portion is formed. The curved line forms a refracted surface that retreats inward to prevent clogging and blockage. Moreover, unlike the side surface 52 in the direction of rotation, the side surface 53 in the direction opposite to the rotation is hardly subjected to the severe wear effect caused by the rotation of the hammer, so that even if it is used for a long period of time, the step disappears due to wear. There is little concern.

【0009】[0009]

【考案の効果】[Effect of the device]

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 portion with the widest eye width, and the line with the opening faces the outside. Since it has a step that expands, the resistance of the discharge remarkably decreases in the latter half of the decrease of the discharge force in the opening to compensate for this, and the crushed object M does not become clogged and is smooth. Work can be performed continuously. Furthermore, the service life of the GREAT 5 is not adversely affected, and the replacement cycle is longer than in the past, so the productivity throughout the year can be greatly improved.

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

【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.

【符号の説明】[Explanation of symbols]

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)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 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 having an inlet 2 for supplying an object to be crushed M above a casing 1 and having a rotor 3 rotating at a high speed in the casing 1 evenly arranged on a divided circumference. In a hammer mill comprising a great 5 which is swingably engaged and which regularly opens along the lower half of the rotation path of the rotor 3, the opening cross section of the great 5 has a center inclined in the direction of rotation of the hammer. A step 5 having a line C and symmetrically extending outward from the center line and further extending outward on a side surface 53 opposite to the hammer rotation.
Hammer mill characterized by having 4.
JP1625692U 1992-02-18 1992-02-18 Hammer mill Expired - Lifetime JPH08999Y2 (en)

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 true JPH0567332U (en) 1993-09-07
JPH08999Y2 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011251215A (en) * 2010-05-31 2011-12-15 Endo Kogyo Kk Crusher

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011251215A (en) * 2010-05-31 2011-12-15 Endo Kogyo Kk Crusher

Also Published As

Publication number Publication date
JPH08999Y2 (en) 1996-01-17

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