EP0056236A2 - Broyeur à galets, en particulier pour le broyage de charbon - Google Patents

Broyeur à galets, en particulier pour le broyage de charbon Download PDF

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Publication number
EP0056236A2
EP0056236A2 EP82100023A EP82100023A EP0056236A2 EP 0056236 A2 EP0056236 A2 EP 0056236A2 EP 82100023 A EP82100023 A EP 82100023A EP 82100023 A EP82100023 A EP 82100023A EP 0056236 A2 EP0056236 A2 EP 0056236A2
Authority
EP
European Patent Office
Prior art keywords
rocker arm
gas
grinding
roller
tight
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
EP82100023A
Other languages
German (de)
English (en)
Other versions
EP0056236B1 (fr
EP0056236A3 (en
Inventor
Horst Dipl.-Ing. Brundiek
Ludwig Werner
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.)
Loesche GmbH
Original Assignee
Loesche GmbH
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 Loesche GmbH filed Critical Loesche GmbH
Priority to AT82100023T priority Critical patent/ATE19861T1/de
Publication of EP0056236A2 publication Critical patent/EP0056236A2/fr
Publication of EP0056236A3 publication Critical patent/EP0056236A3/de
Application granted granted Critical
Publication of EP0056236B1 publication Critical patent/EP0056236B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed

Definitions

  • the invention relates to a roller mill, in particular for coal grinding, with a gas-tight mill housing, a rotating grinding table and a plurality of grinding rolls rolling on the grinding table, of which each grinding roll is mounted with a rocker arm about a rocker arm axis.
  • Air or gas usually at a higher temperature than the ambient temperature, flows through the mill.
  • the air or gas is used to dry the regrind and is used as a means of dust transport.
  • the gas enters the connecting piece of a gas chamber below the rotating grinding plate with a blade ring at a higher than atmospheric pressure, generated by a separate blower, flows through the blade ring that surrounds the grinding plate into the grinding chamber, collects ground material there, dries it using the floating gas process and carries the shredded material to the sifter above the grinding chamber.
  • the main idea of the invention is to develop roller mills with a gas-tight housing according to a modular system, which is to be done in such a way that each grinding roller with the parts required for pivoting out is manufactured as a unit, in such a way that each roller mill with a variable number of Rollers can be made without essential changes of the grinding roller with the associated organs for swinging out of the same parts are required.
  • each grinding roller unit it is possible to group the grinding roller with the associated parts for pivoting out around a grinding bowl, it being possible for each grinding roller unit to be preferably arranged on a stand.
  • the task here was to include the rocker arm in the mill housing and to seal it gas-tight, because roller mills for grinding coal in so-called direct injection systems are operated with a hot air stream that has a higher than atmospheric pressure.
  • the invention accordingly consists in that the rocker arm is guided and uncoupled from a fork, at the end of which a force for pressing and lifting the grinding roller is introduced, and the rocker arm is encapsulated and incorporated into the gas-tight mill housing.
  • the rocking lever of the grinding roller and the fork are positively connected to one another during operation by bolts to form a functional unit, the bolts for decoupling the rocking lever from the fork being removably arranged for the maintenance of the grinding roller and the associated parts, so that only the rocker arm takes part in a pivoting movement of the grinding roller to the outside.
  • the gas-tight closure of the rocker arm also has a cover which can be connected in the upper part to the gas-tight housing and whose lower part closes the rocker arm in a curved shape and extends as far as a collar surrounding the roller axis.
  • a sealing air chamber which is guided around the rocker arm axis is arranged on each side of the cover in order to obtain a gas-tight seal against the rocker arm axis.
  • the ratio of the rod force of I i ydrau- likzylinders and the roll separating force is between 50% and 150% by weight.
  • the rocker arm is hollow and is traversed with sealing air which is introduced into the lever at any point outside the grinding chamber, preferably on one end face, from where it is guided to an annular gap between the roller and sleeve of the rocker arm and from here with a high Pressure and high speed enters the grinding chamber.
  • a grinding roller unit is arranged on a load-bearing bracket.
  • a basic form of a roller mill can optionally be equipped with two or more grinding rollers, with a fundamental modification of the grinding roller unit for two or more grinding rollers. is not required.
  • This advantage is connected with an absolute gas tightness of the roller mill and devices in order to be able to swing out all or one grinding roller for maintenance purposes.
  • Fig. 1 shows a schematic representation of a roller mill designed in a known manner with two grinding rollers 1, with the stands 9, of which several are arranged around the grinding bowl 10.
  • the gas-tight mill housing 12 In the area of the grinding rollers 1 there is the gas-tight mill housing 12 and the removable cover 11 for the pivoting out of the grinding rollers 1.
  • the grinding roller 1 On the left side, the grinding roller 1 'is shown in dashed lines in the pivoted-out position.
  • the classifier housing 50 with the classifier 51 is arranged above the gas-tight housing 12.
  • the outlet 52 for the hot air flow is identified by the number 52.
  • the arrow 53 indicates the path of the feed material, namely the raw coal fed into the mill.
  • the hot air flow is fed to the grinding chamber through the blade ring 56, which is fastened to the mill housing 12 in this exemplary embodiment.
  • Embodiments are also possible in which the blade ring is attached to the grinding table 10.
  • FIG. 2 already shows essential parts of the invention, but these are shown in more detail in FIG. 3.
  • the drawing shows a side view of the grinding roller 1 on the grinding bowl 10, which is designated 1 'in the pivoted-out position.
  • the rocker arm 2 carries the axis of the grinding roller 1, which is shown in section in Fig. 3.
  • the rocker arm 2 is located within a gas-tight cover 11, which is removably attached to the housing wall 12 and surrounds the lower part of the rocker arm 2 in a curved shape and connects to the wall 27.
  • columns 29 also serve for the outflow of air or gas from the chamber, which is formed from the cover 11 and the walls 26, 27, into the grinding chamber, the air or gas receiving a higher pressure than the mill pressure.
  • the introduction of air or gas takes place by the illustrated in Fig. 3 neck 3 0.
  • Gas is preferably withdrawn from the gas duct 6o below the blade ring 56. Due to the flow resistance of the blade ring 56 there is a pressure drop from the gas channel 6o into the grinding chamber 48. Therefore gas can from the gas port 6 0 without an additional blower through the port 3o in the chamber formed by the positions 11, 26, 27, are led 29 .
  • An auxiliary cylinder 37 is also provided for maintenance work and is removable. The latter engages articulated eyes 36 which are arranged in the hubs 17a, 17b.
  • the more detailed training is shown in Fig. 4, so that the further details of this training must be reserved for the discussion of Fig. 4.
  • FIG. 2 also shows the arrangement of the fork 4, which is slightly curved inwards and is connected at the end to the axis 8, which belongs to the hydropneumatic pressing device 7 with the piston 16, which ends in an axis 8 ' , which connects the hydraulic pressure device to the foundation 55 on which the gear 54 for driving the grinding bowl 10 is located.
  • the spring buffer consists of a stop pin 32 to which a spring 33 is fastened within a housing.
  • FIG. 3 shows a section through the rocker arm 2 and the rocker arm axis 3, to which the fork 4 is connected at the bottom.
  • the rocker arm 2 with the rocker arm axis 3 has a gas-tight capsule 11, the upper end of which can be connected or detached to the mill housing 12, so that the rocker arm 2 can be swung out. All parts designated 12 in the illustration still belong to the gas-tight mill housing.
  • the axis 3 of the rocker arm 2 is hollow. The further training in the area of the rocker arm is such that the ingress of dust or foreign bodies through sealing air is prevented. As can be seen in FIG.
  • an air connection piece 40 is attached to one end of the hollow shaft 3, from which the sealing air is introduced into the interior 42 and 43 of the rocker arm 2 via the bore 41. From here, the sealing air passes through bores 44, which are located on both sides of the hollow axis 3, into the annular gaps 45, which are formed by the sleeve 46 and the grinding roller 1.
  • the annular gap 45 should be relatively narrow. Through this annular gap, the sealing air enters the grinding chamber 48 at high speed and at a higher pressure than the grinding chamber pressure, in which the rollers 1 rotate. This measure prevents the aggressive grinding dust from migrating into the gap 45 and reaching the grinding roller 1.
  • the end of the grinding roller axis is secured by an end plate 49, as can be seen from the illustration in FIG. 3.
  • the number 29 denotes the relatively narrow gaps that form the connection to the gas-tight housing, namely 26 and 27.
  • FIG. 3 further shows bolt openings 19 in the fork 4, which are designed to be removable and the detachable connection between the rocker arm 2 and the fork 4 represent.
  • the arrangement of these bolt connections 19 also results from the illustration in FIG. 4, which shows the bolt connections seen from the side.
  • FIG. 4 shows the bolt connections seen from the side.
  • the hinge eye 5 with the axis 8 is indicated.
  • Fig. 4 shows the details of the mounting of the rocker arm axis 3, the arrangement of which also results from the illustration in Fig. 3.
  • the rocker arm axis 3 is supported on the stand 9, which is shown in section in Fig. 4.
  • the fork 4 engages due to its curved shape through the stand 9 in the area below the grinding bowl lo.
  • the cheeks 14 are, as can be seen in the illustration, so far apart that the cover 11 (see FIG. 3) with the two sealing air chambers 15a and 15b can be arranged between them.
  • the torque transmission ie the power transmission from the piston 16 (see FIG.
  • the rocker arm is sealed off from the outside atmosphere by encapsulating the covers 11 and 12.
  • the rocker arm passages are passed through these covers 11 and 12 provided with very narrow gaps.
  • the columns 24 are thus blown by introducing air or gas as a blocking agent into the connecting piece 25 of the sealing air chambers 1 5 a and 15 b because the supplied air or the gas has a higher pressure than the gas pressure in the mill.
  • the rocker arm axis 3 is supported at its ends by roller bearings 23. With 36 articulated eyes are designated, the function of which results from the illustration in FIG. Finally, the illustration in FIG. 4 also shows the axis 8 at the lower end, which was already described in FIG. 2 as a hydropneumatic pressing device in connection with the hydraulic cylinder 7.
  • the shortest distance (a) (see FIGS. 2 and 3) between the axis of the hydraulic cylinder 7 and the fulcrum of the rocker arm axis 3 is between 50 and 95% of that distance (b) (see FIG. 3 ), which is the center of the rocker arm axis 3 from the center of the grinding roller 1 according to the drawn line of the grinding bowl lo.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Disintegrating Or Milling (AREA)
  • Mold Materials And Core Materials (AREA)
  • Table Devices Or Equipment (AREA)
EP82100023A 1981-01-08 1982-01-05 Broyeur à galets, en particulier pour le broyage de charbon Expired EP0056236B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100023T ATE19861T1 (de) 1981-01-08 1982-01-05 Walzenmuehle, insbesondere fuer die kohlenvermahlung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3100341 1981-01-08
DE19813100341 DE3100341A1 (de) 1981-01-08 1981-01-08 Walzenmuehle, insbesondere fuer die kohlenvermahlung

Publications (3)

Publication Number Publication Date
EP0056236A2 true EP0056236A2 (fr) 1982-07-21
EP0056236A3 EP0056236A3 (en) 1984-05-02
EP0056236B1 EP0056236B1 (fr) 1986-05-21

Family

ID=6122312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100023A Expired EP0056236B1 (fr) 1981-01-08 1982-01-05 Broyeur à galets, en particulier pour le broyage de charbon

Country Status (7)

Country Link
US (1) US4432500A (fr)
EP (1) EP0056236B1 (fr)
JP (1) JPS57135051A (fr)
AT (1) ATE19861T1 (fr)
DE (2) DE3100341A1 (fr)
DK (1) DK161946C (fr)
ZA (1) ZA819034B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2716366A1 (fr) * 2012-10-05 2014-04-09 Alstom Technology Ltd Ensemble de boulon d'arrêt à ressort en relief pour broyeurs à cuve tournante peu profonds

Families Citing this family (38)

* Cited by examiner, † Cited by third party
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JPS6013245U (ja) * 1983-07-06 1985-01-29 石川島播磨重工業株式会社 竪型ミル用ピボツト軸の軸受装置
JPS60128739U (ja) * 1984-02-06 1985-08-29 三菱重工業株式会社 回転式分級装置
JPS60128784U (ja) * 1984-02-06 1985-08-29 三菱重工業株式会社 回転式分級装置
US4694997A (en) * 1985-12-12 1987-09-22 Fuller Company Apparatus for exerting a downward force on a grinding roller
JPS6320953U (fr) * 1986-07-23 1988-02-12
DE4209459A1 (de) * 1992-03-24 1993-09-30 Krupp Polysius Ag Wälzmühle
DE4223151C2 (de) * 1992-07-14 1994-11-10 Loesche Gmbh Verfahren zur Mahlung von Rohbraunkohle
US5529253A (en) * 1995-04-05 1996-06-25 March-Southwestern Corp. Spring canister for pulverizer
US6609669B2 (en) 2001-09-07 2003-08-26 The Babcock & Wilcox Company Hydraulic loading system for ball and ring pulverizers
US7226010B2 (en) * 2004-02-27 2007-06-05 Abb Inc. Method and apparatus for solid fuel pulverizing operation and maintenance optimization
DE102006061328B4 (de) * 2006-12-22 2014-01-16 Gebr. Pfeiffer Ag Wälzmühle
DE102007009723A1 (de) * 2007-02-28 2008-09-04 Polysius Ag Rollenmühle
US20090008487A1 (en) * 2007-07-03 2009-01-08 Riley Power, Inc. Loading system for vertical material size reduction system
WO2009135557A1 (fr) * 2008-05-08 2009-11-12 Hitachi Power Europe Gmbh Broyeur à rouleaux avec injection de gaz d'arrêt
DE102008022847B4 (de) * 2008-05-08 2010-10-28 Hitachi Power Europe Gmbh Wälzmühle mit Sperrgasbeaufschlagung und Verfahren zum Betreiben einer Wälzmühle
DE202009004025U1 (de) 2009-03-19 2010-08-12 Loesche Gmbh Hydraulikanordnung für Wälzmühlen
DE102009015037B4 (de) 2009-03-26 2011-03-31 Loesche Gmbh Wälzmühle
JP5668902B2 (ja) * 2009-06-08 2015-02-12 宇部興産機械株式会社 竪型粉砕機
US8508878B1 (en) 2010-01-21 2013-08-13 Marvell International Ltd. Write clock phase tracking for magnetic recording device
US8508879B1 (en) 2010-01-21 2013-08-13 Marvell International Ltd. Write clock rephase for magnetic recording device
DE102010010752A1 (de) * 2010-03-09 2011-09-15 Loesche Gmbh Wälzmühle
JP2011183344A (ja) * 2010-03-10 2011-09-22 Ihi Corp 竪型ミル
DE102010031442A1 (de) * 2010-07-16 2012-01-19 Hitachi Power Europe Gmbh Spannsystem, insbesondere hydropneumatisches Spannsystem, einer Wälzmühle
DE102011014592A1 (de) 2011-03-21 2012-09-27 Loesche Gmbh Wälzmühle
CN102580819B (zh) * 2012-02-27 2015-01-07 南京凯盛国际工程有限公司 一种新型立磨限位装置
CN103100466B (zh) * 2013-01-14 2015-07-08 莱歇研磨机械制造(上海)有限公司 一种辊式磨机磨辊外壳结构
CN103071565A (zh) * 2013-01-14 2013-05-01 莱歇研磨机械制造(上海)有限公司 一种辊式磨机磨辊外壳安装结构
CN103071564A (zh) * 2013-01-14 2013-05-01 莱歇研磨机械制造(上海)有限公司 一种辊式磨机磨辊安装外壳的壳本体结构
CN103071566A (zh) * 2013-01-14 2013-05-01 莱歇研磨机械制造(上海)有限公司 一种辊式磨机磨辊安装外壳的磨辊封头结构
CN103447789B (zh) * 2013-05-31 2016-08-10 上海宝冶集团有限公司 立式磨机磨辊辊套的更换方法
JP2016528038A (ja) 2013-08-19 2016-09-15 ロエシェ ゲーエムベーハー 竪型ローラミル
EP2999542B1 (fr) 2014-10-31 2017-08-09 Loesche GmbH Cylindre de broyage
CN104588174A (zh) * 2015-01-27 2015-05-06 中材（天津）粉体技术装备有限公司 立式辊磨机
US10799874B2 (en) * 2015-05-27 2020-10-13 General Electric Technology Gmbh Modified journal assembly for pulverizer
DK3414013T3 (da) 2016-02-08 2019-08-05 Loesche Gmbh Malevalse-indretning
US10343173B2 (en) * 2016-04-29 2019-07-09 General Electric Technology Gmbh System, method and apparatus for servicing a pulverizer
CN112156852A (zh) * 2020-10-13 2021-01-01 南京凯盛国际工程有限公司 一种用于生产机制砂的立磨
CN114653436B (zh) * 2022-03-31 2024-09-24 中材（天津）粉体技术装备有限公司 辅磨辊驱动的碾磨装置

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DE1507582A1 (de) * 1966-07-23 1969-04-03 Loesche Kg Waelzmuehle,insbesondere Walzenmuehle fuer UEberdruckbetrieb
DE2128929A1 (de) * 1971-06-11 1973-01-04 Loesche Kg Walzenmuehle
US3818567A (en) * 1973-03-29 1974-06-25 American Chain & Cable Co Apparatus for positioning journal assemblies in pulverizers

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DE742912C (de) * 1939-08-25 1943-12-15 Neuman & Esser Federrollenmuehle fuer UEberdruckbetrieb
DE724658C (de) * 1940-06-11 1942-09-02 Ernst Curt Loesche Federung fuer die Mahlrollen von Federrollenmuehlen
US3591094A (en) * 1969-02-20 1971-07-06 Peter Gauer Control system for roll grinders
JPS5222160A (en) * 1975-08-12 1977-02-19 Ube Ind Ltd Contact pressure adjusting device for powdering machine
US4000860A (en) * 1975-11-13 1977-01-04 Leesona Corporation Size reduction apparatus
DE2703535C2 (de) * 1977-01-28 1986-07-10 Loesche GmbH, 4000 Düsseldorf Wälzmühle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1507582A1 (de) * 1966-07-23 1969-04-03 Loesche Kg Waelzmuehle,insbesondere Walzenmuehle fuer UEberdruckbetrieb
DE2128929A1 (de) * 1971-06-11 1973-01-04 Loesche Kg Walzenmuehle
US3818567A (en) * 1973-03-29 1974-06-25 American Chain & Cable Co Apparatus for positioning journal assemblies in pulverizers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2716366A1 (fr) * 2012-10-05 2014-04-09 Alstom Technology Ltd Ensemble de boulon d'arrêt à ressort en relief pour broyeurs à cuve tournante peu profonds
AU2013237689B2 (en) * 2012-10-05 2015-05-28 General Electric Technology Gmbh Relief spring stop bolt assembly for shallow bowl mills
US9429977B2 (en) 2012-10-05 2016-08-30 Alstom Technology Ltd Relief spring stop bolt assembly for shallow bowl mills

Also Published As

Publication number Publication date
JPS6411339B2 (fr) 1989-02-23
DE3271222D1 (en) 1986-06-26
EP0056236B1 (fr) 1986-05-21
DK161946B (da) 1991-09-02
DK5682A (da) 1982-07-09
DK161946C (da) 1992-02-03
JPS57135051A (en) 1982-08-20
ATE19861T1 (de) 1986-06-15
US4432500A (en) 1984-02-21
DE3100341A1 (de) 1982-07-22
EP0056236A3 (en) 1984-05-02
ZA819034B (en) 1982-11-24

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