EP3291914B1 - Cylindre broyeur avec dispositif de refroidissement - Google Patents

Cylindre broyeur avec dispositif de refroidissement Download PDF

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Publication number
EP3291914B1
EP3291914B1 EP16719840.7A EP16719840A EP3291914B1 EP 3291914 B1 EP3291914 B1 EP 3291914B1 EP 16719840 A EP16719840 A EP 16719840A EP 3291914 B1 EP3291914 B1 EP 3291914B1
Authority
EP
European Patent Office
Prior art keywords
pipe
channel
grinding roller
roller shaft
bore
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.)
Active
Application number
EP16719840.7A
Other languages
German (de)
English (en)
Other versions
EP3291914A1 (fr
Inventor
Christina SIEKMANN
André DORNBLUT
Carsten Bock
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.)
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
Original Assignee
ThyssenKrupp AG
ThyssenKrupp Industrial Solutions AG
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 ThyssenKrupp AG, ThyssenKrupp Industrial Solutions AG filed Critical ThyssenKrupp AG
Publication of EP3291914A1 publication Critical patent/EP3291914A1/fr
Application granted granted Critical
Publication of EP3291914B1 publication Critical patent/EP3291914B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/44—Cooling or heating rollers or bars

Definitions

  • the invention relates to a grinding roller shaft with a cooling device for cooling a grinding roller.
  • grinding rollers For crushing materials such as rocks, ores, coal or other materials usually grinding rollers are used.
  • Known grinding rollers comprise two roller bodies, which rotate in opposite directions to each other and shred material introduced between the grinding rollers.
  • the shaft of the grinding roller is cooled by a cooling water circuit in a shaft bore, wherein a coolant is passed through a bore in the grinding roller shaft. Damage caused by deposits and corrosion on the grinding roller shaft and the cooling device is frequently the result of the operation of known cooling devices.
  • a cooling device of a grinding roller of a roller mill is for example from DE 10 2012 106 527 A1 . DE 197 00 347 A1 . US 4019846 A or CN 104289273 A known.
  • the production cost and the production cost of such known cooling devices for grinding rollers are high, and the assembly, especially in work environments with small mounting space is complex.
  • Grinding roller shaft (12) on which a roller mill (11) is mounted for a roller mill and which is rotatable about its longitudinal axis comprises according to a first aspect of an axial bore in the grinding roller shaft, in which a cooling device is arranged, at least one in the bore arranged between the tube and the inner surface of the bore, a first channel for guiding a coolant and within the tube, a second channel to Guide the coolant is formed, wherein the at least one tube is formed of a plastic.
  • a pipe formed of plastic has no electrical conductivity and offers the advantage that no corrosion can occur by flowing along the pipe coolant along the pipe. Furthermore, a tube made of plastic has a high temperature resistance, which is advantageous in particular when used in a cooling device of a grinding roller of a roller mill, since during operation of the roller mill, as well as during storage and transport of the cooling device temperatures of about -40 ° C to + 80 ° C, especially -20 ° C to + 40 ° C occur.
  • a plastic tube In contrast to tubes formed, for example, of metal, a plastic tube has a low thermal conductivity, so that, for example, a coolant flowing through the first channel hardly heats coolant, preferably not at all, flowing in the second channel.
  • the plastic tube isolates the first channel thermally from the second channel, with no additional coating or space between the first channel and the second channel necessary.
  • the plastic pipe has a wall thickness of 10mm to 30mm and is inelastic.
  • a plastic tube is also easy and inexpensive to produce.
  • the tube is made of a high-density polyethylene (PE-HD) or a polyvinylidene fluoride (PVDF), which are also particularly inexpensive.
  • PE-HD high-density polyethylene
  • PVDF polyvinylidene fluoride
  • Such plastics also have a resistance to chemicals, so that when cleaning the cooling device, in particular with phosphoric acid, no damage to the pipes occurs.
  • the cooling device has a first tube and a second tube, which is arranged within the first tube, wherein the interior of the second tube forms the second channel for guiding the coolant.
  • the tubes are arranged coaxially with each other in the bore.
  • a dual-tube cooler provides reliable thermal isolation of the first channel from the second channel, the first channel being disposed between the outer surface of the first tube and the inner surface of the bore of the refining roller shaft.
  • the second tube is preferably formed of a plastic.
  • the second tube has a smaller diameter than the first tube and is arranged coaxially therewith so that a gap is formed between the tubes.
  • the gap between the two tubes of the cooling device provides additional thermal isolation of the first channel from the second channel, so that a high temperature difference of the coolant in the first channel to the coolant in the second channel is possible.
  • the cooling device has according to a further embodiment exactly one tube, wherein the interior of the tube forms the second channel.
  • a cooling device with only one tube allows a reduction of the components of the cooling device and thus a cost savings.
  • the assembly of the cooling device in the grinding roller shaft, as well as the maintenance of the cooling device is simplified by a reduced number of components, resulting in a cost and time savings.
  • the reduction of the components of the cooling device to only one tube is made possible, in particular, by the formation of the tube from a plastic, since the use of a plastic tube makes it possible to dispense with additional insulation of the first channel from the second channel.
  • the second channel forms according to a further embodiment of a return for heated in the first channel coolant.
  • the coolant flows from a coolant inlet at one end of the bore through the first channel along the inner surface of the bore, wherein the coolant is heated and the grinding roller shaft is cooled.
  • the coolant flows through the second channel inside the tube back to a coolant outlet.
  • the flow direction of the coolant described has the advantage that the coolant is guided directly after the coolant inlet directly along the surface to be cooled, namely the inner surface of the bore, which allows a particularly efficient cooling.
  • the tube is arranged according to a further embodiment substantially coaxially with the bore. This allows efficient cooling of the grinding roller shaft, with the coolant being guided along the inner surface of the bore.
  • the outer diameter of the tube over the entire extension of the tube is less than the inner diameter of the bore, so that the first channel between the outer surface of the tube and the inner surface of the bore is formed.
  • the cooling device has, according to a further embodiment, at least one spacer, which spaces the tube to the inner surface of the bore. This allows centering of the at least one tube of the cooling device in the bore, so that a distance between the tube and the inner surface of the bore is ensured and a flow through the first channel is made possible.
  • the spacer is substantially annular in shape and attached to the outer tube circumference. Ring-shaped spacers allow easy mounting of the cooling device in the bore.
  • the annular spacer has projections which are formed as skids and slide during assembly of the tube in the bore on the inner surface of the bore, whereby damage to the inner surface of the bore is avoided.
  • An annular spacer also allows easy centering of the tube in the bore.
  • the at least one tube has according to a further embodiment at least two separate pipe sections, which are connected to each other via a connecting device.
  • a plurality of pipe sections are conceivable, which are connected together to form a tube.
  • the pipe sections preferably have the same length, whereby the production of the pipe sections is simplified.
  • a plurality of pipe sections enables easy assembly and disassembly of the cooling device in the grinding roller shaft.
  • the mounting space available for mounting or dismounting of the cooling device is often very small, so that a tube which has approximately the length of the grinding roller shaft, very difficult and time-consuming to assemble.
  • a tube comprising several pipe sections simplifies the assembly and disassembly of the cooling device considerably.
  • the pipe sections are releasably connected to each other according to another embodiment, which allows a quick disassembly of the individual pipe sections.
  • the connecting device is in particular a screw or clamp connection.
  • the pipe sections are preferably connected to one another via a sleeve, in particular a double sleeve.
  • a sleeve has a small thickness and thus allows a sufficient distance of the connecting means to the inner surface of the bore of the grinding roller shaft.
  • the first channel and the second channel are in fluid communication via a connecting element such that coolant flowing through the first channel flows into the second channel.
  • the cooling device is mounted in the bore such that the cooling device is stationary relative to the grinding roller shaft.
  • the grinding roller shaft rotates about its longitudinal axis, wherein the cooling device mounted in the bore of the grinding roller shaft rotates with the grinding roller, so that the cooling device and the grinding roller do not move relative to one another.
  • Fig. 1 shows a section of a grinding roller shaft 12 in the manner not shown, a grinding roller is mounted.
  • the grinding roller shaft 12 has an axial bore 14 passing through the grinding roller shaft 12.
  • the grinding roller shaft 12 further includes a cooling device 10 disposed in the bore 14.
  • Cooling device 10 includes a first tube 16 disposed internally of bore 14 and coaxial therewith.
  • the outer diameter of first tube 16 is less than the inner diameter of bore 14 such that a first channel is defined between the inner surface of bore 14 and the outer surface of tube 16 18 is formed for guiding a coolant.
  • a second tube 20 is arranged.
  • the second tube 20 has a smaller diameter than the first tube 16 and is disposed within the first tube 16, so that between the first tube 16 and the second tube 20, a gap 22 is formed.
  • the interior of the second tube 20 forms a second channel 24 for guiding the coolant.
  • the first pipe 16 and the second tube 20 have the same length and are formed of a plastic.
  • the first tube 16 and the second tube 20 are each divided into two tube sections 16a, 16b and 20a, 20b, which are formed as separate components.
  • the pipe sections 16a, 16b, 20a and 20b each have the same length, so that the tubes 16 and 20 are divided centrally in the radial direction.
  • the axially juxtaposed pipe sections 16 a, 16 b are connected to each other via a connecting device 46, so that they form the first tube 16.
  • the pipe sections 20a and 20b are connected to each other via a connecting device 48 to the second pipe 20, wherein the connecting device 46, 48 is for example a sleeve.
  • a plurality of spacers 36 are further arranged, which space the first tube 16 to the inner surface of the bore 14.
  • the spacers 36 are substantially annular in shape and mounted on the outer periphery of the first tube 16, so that they are rotatably connected to the tube 16. Exemplary are in the embodiment in Fig. 1 four spacers 36 attached.
  • the spacers 36 also have passages for the coolant, so that a flow of the coolant through the first channel 18 is made possible.
  • the bore 14 through the grinding roller shaft 12 has at its one end a cover 26 which has a substantially circular cross section and through which the bore 14 is sealed against the environment.
  • the cover 26 is followed by a connecting element 28 in the direction of the bore 14.
  • the connecting element 28 allows fluid communication of the first channel 18 and the second channel 24.
  • the connecting element 28 has at least one passage, which allows a flow of coolant from the first channel 18 into the second channel 24.
  • the connecting element 28 allows a flow of the coolant from the first channel 18 into the second channel 24 and at the same time prevents a flow of the coolant from the first channel 18 or the second channel 24 into the intermediate space 22.
  • the connecting element 28 is connected to the first tube 16 and attached to the second tube 20, wherein the connecting element 28 is not applied to the cover 26.
  • the first tube 16 and the second tube 20 extend from the connecting element 28 to the other end of the bore 14 of the grinding roller shaft 12.
  • the opposite end of the cover 26 of the bore 14 has a coolant connection 30 which in Fig.1 is shown schematically.
  • the coolant port includes a coolant inlet 32 in fluid communication with the first channel 18 and a coolant outlet 34 in fluid communication with the second channel 24.
  • the grinding roller shaft 12 rotates about its central axis, with the cover 26 rotating with the grinding roller shaft 12.
  • the cooling device 10 arranged in the bore 14 of the grinding roller shaft 12 is connected to the grinding roller in such a way that it rotates about the longitudinal axis with the grinding roller during operation of the grinding device.
  • the spacer 36 slides only during assembly of the cooling device on the inner surface of the bore 14th
  • coolant flows through the coolant inlet 32 into the first channel 18 along the inner surface of the bore 14, thereby cooling the grinding roller shaft 12 along the bore 14.
  • the heated coolant flows at the end of the bore into the connecting element 28, through which it is passed into the second channel 24.
  • the second channel 24 forms a return of the heated coolant, wherein the gap 22 between the first channel 18 and the second channel 24 prevents heat transfer of the heated coolant of the second channel 24 to the coolant of the first channel 18. It is also possible to reverse the flow direction of the coolant so that coolant flows from a coolant inlet 34 into the second channel 24 and is conducted through the connecting element 28 into the first channel 18, where it flows along the inner surface of the bore 14 and cooling Grinding roller shaft 12 generates.
  • Fig. 2 shows a further embodiment of a cooling device, wherein the structure of the grinding roller shaft 12 with the bore 14 of the embodiment of Fig. 1 equivalent.
  • the cooling device 12 from Fig. 2 only a tube 38 which is coaxial with the bore 14 disposed therein.
  • the tube 38 has a smaller diameter than the bore 14 and is arranged centrally within the bore 14.
  • a first channel 18 is formed, in which the coolant for cooling the inner surface of the bore 14 of the grinding roller shaft 12 flows.
  • a second channel 24 is formed for guiding the coolant, which forms a return of the heated coolant.
  • the first channel 18 and the second channel 24 are in the in Fig. 2 illustrated embodiment separated by the tube 38.
  • a cover 26 Adjoining the cover 26 in the direction of the bore 14 is a connecting element 40 which has at least one passage, for example at least one through-bore, which constitutes a fluid connection between the first passage 18 and the second passage 24.
  • the throughbore is preferably centered and has a smaller diameter than the second channel 24, so that a backflow from the second channel 24 into the first channel 18 is avoided.
  • the tube 38 further comprises two pipe sections 38a and 38b, which are formed approximately identically and are arranged side by side in the bore 14.
  • the pipe sections 38a, and 38b are detachably connected to each other via a connection 44, such as a sleeve.
  • a connection 44 such as a sleeve.
  • the cooling device 10 further has a plurality of spacers 42, which are formed substantially annular. Exemplary are in the embodiment of Fig. 2 arranged four spacers 42 which are mounted circumferentially on the tube 38.
  • the spacers 42 are mounted on the tube 38 so as to be substantially the same distance apart, the spacers 42 being fixed to the tube 38 in a rotationally fixed manner and sliding along the interior of the bore 14 during assembly of the cooler into the grinding roller shaft 12 ,
  • a coolant port 30 according to Fig. 1 with a coolant inlet 32 and a coolant outlet 34.
  • coolant flows from the coolant inlet 32 through the first channel 18 along the inner surface of the bore 14 of the grinding roller shaft 12 through the passages in the connecting element 40 into the second channel 24 and exits the cooling device 10 through the coolant outlet 34
  • Channel 24 flowing heated coolant is in contrast to the embodiment of Fig. 1 only separated by the wall of the tube 38.
  • the flow direction of the coolant is reversible, so that the coolant first flows through the second channel 24 and then through the first channel 18 along the inner surface of the bore 14.
  • the second tube 20 As well as with reference to Fig. 2 described tube 38 are in particular made of a plastic.
  • the plastic of the first tube 16 and the second tube 20 according to Fig. 1 , and the tube 38 according to Fig. 2 has in particular a low heat transfer coefficient.
  • Fig. 1 made of plastic tubes 16 and 20 for thermal insulation of the tubes 16 and 20 against each other, so that between the first channel 18 and the second channel 24 no heat is transmitted.
  • the formed of a plastic tube 38 provides it for a thermal insulation of the first channel 14 of the second channel 24, wherein was dispensed with an intermediate space between the channels.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)

Claims (14)

  1. Arbre (12) de cylindre broyeur, sur lequel est monté un cylindre broyeur (11) pour un broyeur à cylindres et lequel arbre peut tourner autour de son axe longitudinal, dans lequel l'arbre (12) de cylindre broyeur comprend un alésage axial (14) dans lequel est disposé un dispositif de refroidissement (10) qui comprend au moins un tube (16, 20 ; 38) disposé dans l'alésage (14),
    dans lequel un premier canal (18) destiné au guidage d'un réfrigérant est disposé entre le tube (16, 20 ; 38) et la surface intérieure de l'alésage (14), et un deuxième canal (24) destiné au guidage du réfrigérant est disposé à l'intérieur du tube (16, 20 ; 38),
    caractérisé en ce que ledit au moins un tube (16, 20 ; 38) est réalisé à partir d'une matière synthétique.
  2. Arbre (12) de cylindre broyeur selon la revendication 1, dans lequel le dispositif de refroidissement (10) comprend un premier tube (16) et un deuxième tube (20), dans lequel le deuxième tube (20) est disposé à l'intérieur du premier tube (16) et dans lequel l'intérieur du deuxième tube (20) forme le deuxième canal (24) destiné au guidage du réfrigérant.
  3. Arbre (12) de cylindre broyeur selon la revendication 2, dans lequel le deuxième tube (20) présente un diamètre inférieur à celui du premier tube (16) et est disposé coaxialement à celui-ci, de telle sorte qu'un espace intermédiaire (22) soit formé entre le premier tube (16) et le deuxième tube (20).
  4. Arbre (12) de cylindre broyeur selon la revendication 1, dans lequel le dispositif de refroidissement (10) comprend exactement un tube (38) et l'intérieur du tube (38) forme le deuxième canal (24).
  5. Arbre (12) de cylindre broyeur selon l'une des revendications précédentes, dans lequel le deuxième canal (24) forme un conduit de retour pour le réfrigérant réchauffé dans le premier canal (18).
  6. Arbre (12) de cylindre broyeur selon l'une des revendications précédentes, dans lequel le tube (16, 20 ; 38) est disposé sensiblement coaxialement à l'alésage (14) .
  7. Arbre (12) de cylindre broyeur selon l'une des revendications précédentes, dans lequel le diamètre extérieur du tube (16, 20 ; 38) est, sur toute l'étendue du tube (16, 20 ; 38), inférieur au diamètre intérieur de l'alésage (14), de telle sorte que le premier canal (18) soit formé entre la surface extérieure du tube (16, 20 ; 38) et la surface intérieure de l'alésage (14).
  8. Arbre (12) de cylindre broyeur selon l'une des revendications précédentes, dans lequel le dispositif de refroidissement (10) comprend au moins un élément d'espacement (36 ; 42) qui assure l'espacement du tube (16, 20 ; 38) par rapport à la surface intérieure de l'alésage (14).
  9. Arbre (12) de cylindre broyeur selon la revendication 8, dans lequel l'élément d'espacement (36 ; 42) est de forme sensiblement annulaire et est monté sur la périphérie extérieure du tube.
  10. Arbre (12) de cylindre broyeur selon l'une des revendications précédentes, dans lequel ledit au moins un tube (16, 20 ; 38) comprend au moins deux parties de tube (16a, 16b, 20a, 20b ; 38a, 38b) séparées qui sont reliées les unes aux autres par le biais d'un dispositif de liaison (44 ; 46, 48).
  11. Arbre (12) de cylindre broyeur selon la revendication 10, dans lequel les parties de tube (16a, 16b, 20a, 20b ; 38a, 38b) sont reliées les unes aux autres de manière amovible.
  12. Arbre (12) de cylindre broyeur selon la revendication 10 ou 11, dans lequel le dispositif de liaison (44 ; 46, 48) est une liaison par vissage ou par serrage.
  13. Arbre (12) de cylindre broyeur selon l'une des revendications précédentes, dans lequel le premier canal (18) et le deuxième canal (24) sont en liaison fluidique par le biais d'un élément de liaison (28 ; 40) de telle sorte que le réfrigérant s'écoulant à travers le premier canal (18) s'écoule dans le deuxième canal (24).
  14. Arbre (12) de cylindre broyeur selon l'une des revendications précédentes, dans lequel le dispositif de refroidissement (10) est monté dans l'alésage (14) de telle sorte que le dispositif de refroidissement (10) soit fixe par rapport à l'arbre (12) de cylindre broyeur.
EP16719840.7A 2015-05-07 2016-04-26 Cylindre broyeur avec dispositif de refroidissement Active EP3291914B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015208484.1A DE102015208484A1 (de) 2015-05-07 2015-05-07 Mahlwalze mit einer Kühleinrichtung
PCT/EP2016/059283 WO2016177603A1 (fr) 2015-05-07 2016-04-26 Cylindre de broyage doté d'un dispositif de refroidissement

Publications (2)

Publication Number Publication Date
EP3291914A1 EP3291914A1 (fr) 2018-03-14
EP3291914B1 true EP3291914B1 (fr) 2019-10-30

Family

ID=55862774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16719840.7A Active EP3291914B1 (fr) 2015-05-07 2016-04-26 Cylindre broyeur avec dispositif de refroidissement

Country Status (6)

Country Link
EP (1) EP3291914B1 (fr)
CN (1) CN107567357A (fr)
CL (1) CL2017002788A1 (fr)
DE (1) DE102015208484A1 (fr)
PE (1) PE20180793A1 (fr)
WO (1) WO2016177603A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106552689B (zh) * 2016-11-22 2018-12-04 无锡锡东能源科技有限公司 秸秆锅炉用破渣机
DE102019200059A1 (de) 2019-01-04 2020-07-09 Thyssenkrupp Ag Mahlwalze einer Walzenmühle mit einer Kühleinrichtung
EP3835048B1 (fr) * 2019-12-12 2024-05-08 Johannes Wissing Machine à granuler pourvue de matrice à déplacement en hauteur
CN111589522A (zh) * 2020-06-20 2020-08-28 中冶节能环保有限责任公司 一种破碎辊冷却系统和冷却方法
CN114273001B (zh) * 2021-12-25 2023-07-07 日照海韵装饰设计工程有限公司 一种建筑装饰材料生产用物料粉碎装置

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US4019846A (en) * 1975-06-05 1977-04-26 Wean United, Inc. Rolls in a briquetting machine or like machines
DE19700347A1 (de) * 1997-01-08 1998-07-09 Buehler Ag Walzwerk und Walze hierfür
CN2400180Y (zh) * 1999-12-06 2000-10-11 中国肉类食品综合研究中心 内冷式对辊磨
DE102009033482A1 (de) * 2009-06-22 2011-01-05 Leonhard Breitenbach Gmbh Walze, insbesondere Refinerwalze
CN201807712U (zh) * 2010-10-14 2011-04-27 天津钢铁集团有限公司 板坯连铸机扇形段两分节辊的冷却水结构
DE102012106527B4 (de) * 2012-07-18 2016-01-21 Maschinenfabrik Köppern GmbH & Co KG Presswalze für eine Walzenpresse
CN104289273A (zh) * 2014-10-29 2015-01-21 成都利君实业股份有限公司 一种辊压机及高压辊磨机用辊轴冷却系统

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Also Published As

Publication number Publication date
CN107567357A (zh) 2018-01-09
EP3291914A1 (fr) 2018-03-14
PE20180793A1 (es) 2018-05-08
DE102015208484A1 (de) 2016-11-10
WO2016177603A1 (fr) 2016-11-10
CL2017002788A1 (es) 2018-08-17

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