US3656695A - Roller mill with rotating grinding vessel - Google Patents
Roller mill with rotating grinding vessel Download PDFInfo
- Publication number
- US3656695A US3656695A US45856A US3656695DA US3656695A US 3656695 A US3656695 A US 3656695A US 45856 A US45856 A US 45856A US 3656695D A US3656695D A US 3656695DA US 3656695 A US3656695 A US 3656695A
- Authority
- US
- United States
- Prior art keywords
- grinding vessel
- transmission
- vessel
- roller mill
- shaft
- 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
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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
- B02C15/006—Ring or disc drive gear arrangement
Definitions
- the invention relates to shaft driven roller grinding mills. More in particular, the invention concerns a roller. mill with a rotary grinding vessel where the grinding vessel is put in rotation by drive means in the base of the mill with an intermediate transmission. Mills of this type, when overly loaded or filled are prone to oscillate if they are improperly operated. This results from the fact that the mass of the grinding vessel and a shaft disposed between the transmission and the vessel form a system as a torsion spring in which rotary oscillations can develop. Due to the grinding rollers, possibly influenced by the gears of the transmission, it is possible that oscillations develop in a resonance range that produce large forces and result under certain conditions in damage to the transmission.
- the interrupted connection is chosen so that the flange of the transmission is arranged rotatably upon the end shaft and is no longer keyed to the shaft coming from the transmission as heretofore.
- the transmission shaft is longed or extended upwardly and is one-sidedly coupled with the grinding vessel, as seen in the direction of rotation. At any rate, the oscillatory system that existed heretofore is interrupted, while the radial guidance of the grinding vessel is maintained.
- FIG. 1 is a section taken along line l-I in FIG. 2, and
- FIG. 2 is a plan view taken along line II-II in FIG. 1.
- a drive shaft 2 for the grinding vessel 3 extends vertically upwardly.
- the flange 4 of the transmission is rotatably arranged in the embodiment chosen as an example.
- the drive shaft 2 which extends from the transmission 1 is prolonged upwardly and equipped with a head member 5 which has radially outwardly extending keys 6 or the like. These keys 6 rest against driven members having contact surfaces 7 of the grinding vessel base structure 8 as seen in the direction of rotation.
- the shaft 2 is supported at its lower end and below flange 4' by bearings 2a and 2b, respectively, and a sliding-bearing 4a is interposed between flange 4 and the top of the transmission.
- roller mill having a rotatable grinding vessel having a base supported above a transmission, a sliding bearing intermediate the base of said vessel and said transmission, a shaft extending intermediate said transmission and said grinding vessel centrally of said grinding vessel base and interrupted force transmitting means intermediate the upper end of said shaft and said grinding vessel base, said interrupted force transmitting means comprising a driving key or the like on said shaft and a driven member having a contact surface on said grinding vessel'base.
- roller mill with rotatable grinding vessel in accordance with claim 1 comprising a plurality of driving keys or the like and a plurality of corresponding driven members with spaces between said keys and proximate contact surfaces.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Food-Manufacturing Devices (AREA)
Abstract
A roller mill having a rotatable grinding vessel with a drive shaft for the grinding vessel connected to a transmission where the connection between shaft and vessel is non-positive or interruped.
Description
United States Patent Bacharach [451 Apr. 18, 1972 1 ROLLER MILL WITH ROTATING [56] References Cited GRINDING VESSEL v UNITED STATES PATENTS [72] Bachamh' Kaiseslamem' 2 51s 42s 8/1950 McMurray 146/67 x many 3,540,234 11/1970 Raymond ..146/68 A x [73] Assignee: Gebr, Pfeifier Barbamssawerke AC, 3,550,657 12/ 1970 swanl fie 146/68 A Kajserslautem am Pfalz, Germany 3,076,489 2/ 1 963 Schmidt et a1 146/ l 82 [22] Filed: June 12, 1970 21 APPL N 45,35 Primary Examiner-Robert L. Spruill Attorney-Robert H. Jacob 64/9 R, 14 [30] Foreign Apphcatlon Prlomy Data June 12, 1969 Germany ..P 19 29 912.8 1 1 ABSTRACT A roller mill having a rotatable grinding vessel with a drive [5 2] U.S. Cl ..241/103, 241/1 17, 241/173, h f for the grinding vessel connected to a transmission where 4/ R the connection between shaft and vessel is non-positive or in- [51] Int. Cl. ..B02c 15/00, B020 4/42 terruped. v [58] Field ofSearch ..24l/l03,104, 117-121,
241/173, 176, 10 S; 34/121; 259/57, 81; 146/67A; 2 Claims, 2 Drawing Figures 7 s 2 s e l 1 l I I l 2o PATENTEDAPR 18 m2 3,656,695
INVEN TOR. Ottmar BACHA RACH l ROLLER MILL WI'I'I-I ROTATING GRINDING VFSSEL BACKGROUND OF THE INVENTION The invention relates to shaft driven roller grinding mills. More in particular, the invention concerns a roller. mill with a rotary grinding vessel where the grinding vessel is put in rotation by drive means in the base of the mill with an intermediate transmission. Mills of this type, when overly loaded or filled are prone to oscillate if they are improperly operated. This results from the fact that the mass of the grinding vessel and a shaft disposed between the transmission and the vessel form a system as a torsion spring in which rotary oscillations can develop. Due to the grinding rollers, possibly influenced by the gears of the transmission, it is possible that oscillations develop in a resonance range that produce large forces and result under certain conditions in damage to the transmission.
Acceleration measurements undertaken during operation of such mills have led to the discovery that the conditions described above appear to exist.
SUMMARY OF THE INVENTION It is, therefore, an object of the invention to find meansand ways that make it possible to prevent this resonance in order to protect essential parts of the mill against damage. Thus the course toward a satisfactory solution leads to finding a force the former uninterrupted connection that resulted in the oscillatory system is changed in a manner that it is no longer possible for an uninterrupted oscillatory system to develop. Thus an interruption is found for the uninterrupted connection.
ln particular the interrupted connection is chosen so that the flange of the transmission is arranged rotatably upon the end shaft and is no longer keyed to the shaft coming from the transmission as heretofore. The transmission shaft is longed or extended upwardly and is one-sidedly coupled with the grinding vessel, as seen in the direction of rotation. At any rate, the oscillatory system that existed heretofore is interrupted, while the radial guidance of the grinding vessel is maintained.
pro-
. BRIEF DESCRIPTION OF THE DRAWINGS Further features of the invention and details of the advantages obtained thereby will become apparent from the following description of an embodiment of the subject of the invention schematically illustrated in the drawings in which,
FIG. 1 is a section taken along line l-I in FIG. 2, and
FIG. 2 is a plan view taken along line II-II in FIG. 1.
From the transmission 1 of a grinding roller mill a drive shaft 2 for the grinding vessel 3 extends vertically upwardly.
The flange 4 of the transmission is rotatably arranged in the embodiment chosen as an example. The drive shaft 2 which extends from the transmission 1 is prolonged upwardly and equipped with a head member 5 which has radially outwardly extending keys 6 or the like. These keys 6 rest against driven members having contact surfaces 7 of the grinding vessel base structure 8 as seen in the direction of rotation. The shaft 2 is supported at its lower end and below flange 4' by bearings 2a and 2b, respectively, and a sliding-bearing 4a is interposed between flange 4 and the top of the transmission.
Thus there is no longer a positive connection between the mass of the vessel 3 and its associated parts on the one hand and the transmission and its parts on the other hand, but merely an open or interrupted force transmitting connection. The oscillatory system in which rotational oscillations were formerly able to develop is interrupted. Of course, the radial guidance of the grinding vesselis maintained.
Having now escnbed my invention with reference to the embodiment illustrated, what I desire to protect by letters patent of the United States is set forth in the appended claims.
I claim:
1. Roller mill having a rotatable grinding vessel having a base supported above a transmission, a sliding bearing intermediate the base of said vessel and said transmission, a shaft extending intermediate said transmission and said grinding vessel centrally of said grinding vessel base and interrupted force transmitting means intermediate the upper end of said shaft and said grinding vessel base, said interrupted force transmitting means comprising a driving key or the like on said shaft and a driven member having a contact surface on said grinding vessel'base.
2. Roller mill with rotatable grinding vessel in accordance with claim 1 comprising a plurality of driving keys or the like and a plurality of corresponding driven members with spaces between said keys and proximate contact surfaces.
Claims (2)
1. Roller mill having a rotatable grinding vessel having a base supported above a transmission, a sliding bearing intermediate the base of said vessel and said transmission, a shaft extending intermediate said transmission and said grinding vessel centrally of said grinding vessel base and interrupted force transmitting means intermediate the upper end of said shaft and said grinding vessel base, said interrupted force transmitting means comprising a driving key or the like on said shaft and a driven member having a contact surface on said grinding vessel base.
2. Roller mill with rotatable grinding vessel in accordance with claim 1 comprising a plurality of driving keys or the like and a plurality of corresponding driven members with spaces between said keys and proximate contact surfaces.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1929912A DE1929912C3 (en) | 1969-06-12 | 1969-06-12 | Vertical roller mill with revolving grinding pan |
Publications (1)
Publication Number | Publication Date |
---|---|
US3656695A true US3656695A (en) | 1972-04-18 |
Family
ID=5736832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US45856A Expired - Lifetime US3656695A (en) | 1969-06-12 | 1970-06-12 | Roller mill with rotating grinding vessel |
Country Status (4)
Country | Link |
---|---|
US (1) | US3656695A (en) |
DE (1) | DE1929912C3 (en) |
FR (1) | FR2049972A5 (en) |
GB (1) | GB1258367A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2828401A1 (en) * | 1977-07-01 | 1979-01-11 | Erste Oesterr Zahnraeder | DRIVE ARRANGEMENT FOR ROLLER MILLS |
US4155511A (en) * | 1976-05-12 | 1979-05-22 | F. L. Smidth | Roller mill |
US4210291A (en) * | 1978-07-10 | 1980-07-01 | Erste Osterreichische Zahnraderfabrick Rudolf Kienast Gesellschaft m.b.H. | Roller mill |
US4218023A (en) * | 1977-01-28 | 1980-08-19 | Loesche Gmbh | Grinding pan bearing arrangement and drive of a roller mill |
CN100563835C (en) * | 2006-12-18 | 2009-12-02 | 二重集团(德阳)重型装备股份有限公司 | Vertical roll grinder |
US10677331B2 (en) * | 2017-06-14 | 2020-06-09 | Flender Gmbh | Vertical mill gearbox |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2905025A1 (en) * | 1979-02-09 | 1980-08-14 | Pfeiffer Ag Geb | ROLLER CRUSHING MILL |
EP3025784B1 (en) * | 2014-11-27 | 2017-06-07 | Loesche GmbH | Grinding bowl |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2518428A (en) * | 1947-06-14 | 1950-08-08 | Clearfield Machine Company | Combined scraper and emptier mechanism for wet pan mixing machines |
US3076489A (en) * | 1959-08-10 | 1963-02-05 | Chemetron Corp | Comminuting apparatus |
US3540234A (en) * | 1968-11-29 | 1970-11-17 | Dynamics Corp America | Liquidizer disengageable drive coupling |
US3550657A (en) * | 1968-11-29 | 1970-12-29 | Dynamics Corp America | Homogenizing liquidizer |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8368C (en) * | C. DECHAMP, Ingenieur, in Servilles-les-Eaux | Impact machine for pulverizing any material | ||
BE673808A (en) * | 1964-12-15 | |||
DE1960581A1 (en) * | 1969-12-03 | 1971-06-09 | Vdo Schindling | Device for determining the direction of rotation of a motor starting with an undefined direction of rotation |
-
1969
- 1969-06-12 DE DE1929912A patent/DE1929912C3/en not_active Expired
-
1970
- 1970-06-05 FR FR7020690A patent/FR2049972A5/fr not_active Expired
- 1970-06-11 GB GB1258367D patent/GB1258367A/en not_active Expired
- 1970-06-12 US US45856A patent/US3656695A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2518428A (en) * | 1947-06-14 | 1950-08-08 | Clearfield Machine Company | Combined scraper and emptier mechanism for wet pan mixing machines |
US3076489A (en) * | 1959-08-10 | 1963-02-05 | Chemetron Corp | Comminuting apparatus |
US3540234A (en) * | 1968-11-29 | 1970-11-17 | Dynamics Corp America | Liquidizer disengageable drive coupling |
US3550657A (en) * | 1968-11-29 | 1970-12-29 | Dynamics Corp America | Homogenizing liquidizer |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4155511A (en) * | 1976-05-12 | 1979-05-22 | F. L. Smidth | Roller mill |
US4218023A (en) * | 1977-01-28 | 1980-08-19 | Loesche Gmbh | Grinding pan bearing arrangement and drive of a roller mill |
US4339086A (en) * | 1977-01-28 | 1982-07-13 | Loecshe Gmbh Company | Grinding pan bearing arrangement and drive of a roller mill |
DE2828401A1 (en) * | 1977-07-01 | 1979-01-11 | Erste Oesterr Zahnraeder | DRIVE ARRANGEMENT FOR ROLLER MILLS |
US4210291A (en) * | 1978-07-10 | 1980-07-01 | Erste Osterreichische Zahnraderfabrick Rudolf Kienast Gesellschaft m.b.H. | Roller mill |
CN100563835C (en) * | 2006-12-18 | 2009-12-02 | 二重集团(德阳)重型装备股份有限公司 | Vertical roll grinder |
US10677331B2 (en) * | 2017-06-14 | 2020-06-09 | Flender Gmbh | Vertical mill gearbox |
Also Published As
Publication number | Publication date |
---|---|
DE1929912B2 (en) | 1977-02-10 |
DE1929912A1 (en) | 1971-01-07 |
FR2049972A5 (en) | 1971-03-26 |
GB1258367A (en) | 1971-12-30 |
DE1929912C3 (en) | 1981-10-15 |
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