CA2180136C - A blade for a mixing device - Google Patents
A blade for a mixing device Download PDFInfo
- Publication number
- CA2180136C CA2180136C CA002180136A CA2180136A CA2180136C CA 2180136 C CA2180136 C CA 2180136C CA 002180136 A CA002180136 A CA 002180136A CA 2180136 A CA2180136 A CA 2180136A CA 2180136 C CA2180136 C CA 2180136C
- Authority
- CA
- Canada
- Prior art keywords
- blade
- rotor
- substances
- axis
- motion
- 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
- 239000000126 substance Substances 0.000 claims description 26
- 230000004323 axial length Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
- B01F27/1123—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades sickle-shaped, i.e. curved in at least one direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
- B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
- B01F27/706—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with all the shafts in the same receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
- B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Processing Of Solid Wastes (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Accessories For Mixers (AREA)
- Medicines Containing Plant Substances (AREA)
Abstract
A blade for a mixing device, especially for the mixing of different particles or different liquids, where the blade is mounted on a substantiall y horizontal rotor and extends in a straight line perpendicular to the rotor axis. The blade has a curved cross-section with a front part or first portion facing in the direction of motion of the particles or liquids in the mixing device, a substantially smaller rear part or second portion facing opposite the direction of motion, and a part lying in between and connecting the front and rear parts and substantially parallel to the rotor, axis; such that a substantial portion of the particles or liquids are thrown forwards, and smaller portions are thrown directly outwards and backwards, the particles or liquid s thereby being mixed with particles or liquids thrown forward by a following blade.</ SDOAB>
Description
BLADE FOR A MIXING DEVICE
FIELD OF THE INVENTION
The present invention relates to a blade for a mixing device, where the blade is arranged on a substantially horizontal rotor.
BACKGROUND
Mixing devices are used within a number of fields for mixing two or more different substances, such as particles or liquids or a combination of these, to a desired degree of homogeneity. The different substances are supplied in amounts which are metered to a specified degree. Such substances may be two or more liquids to be mixed, two or more particles, or particles to be added and mixed with liquids. The substances to be mixed have greater or smaller differences in nature and condition.
Such mixing devices are also used for drying or freezing particles either as separate processes or as part of a mixing process.
Mixing devices of this type normally operate with blades or shovels secured to two parallel rotors, rotating in opposite directions. The shape and arrangement of the blades causes the substances to be mixed to be thrown upwards so as to be mixed and simultaneously transported forward in the mixing device.
It is important that the so-called casting curvature of the blades (that is, the upper boundary of the path followed by substances thrown upwards by the blades) is optimized to achieve the best possible mixing together with the desired forward transportation.
Flat blades arranged in different positions along the rotor axis are well known; and there have long been attempts made to change the angle of the blades in relation to the rotor axis and other parameters such as the rotation rate, the length of i v. , ~I i~ I i ~ " ~ I
FIELD OF THE INVENTION
The present invention relates to a blade for a mixing device, where the blade is arranged on a substantially horizontal rotor.
BACKGROUND
Mixing devices are used within a number of fields for mixing two or more different substances, such as particles or liquids or a combination of these, to a desired degree of homogeneity. The different substances are supplied in amounts which are metered to a specified degree. Such substances may be two or more liquids to be mixed, two or more particles, or particles to be added and mixed with liquids. The substances to be mixed have greater or smaller differences in nature and condition.
Such mixing devices are also used for drying or freezing particles either as separate processes or as part of a mixing process.
Mixing devices of this type normally operate with blades or shovels secured to two parallel rotors, rotating in opposite directions. The shape and arrangement of the blades causes the substances to be mixed to be thrown upwards so as to be mixed and simultaneously transported forward in the mixing device.
It is important that the so-called casting curvature of the blades (that is, the upper boundary of the path followed by substances thrown upwards by the blades) is optimized to achieve the best possible mixing together with the desired forward transportation.
Flat blades arranged in different positions along the rotor axis are well known; and there have long been attempts made to change the angle of the blades in relation to the rotor axis and other parameters such as the rotation rate, the length of i v. , ~I i~ I i ~ " ~ I
the blades, etc. to optimize the mixing process.
SUMMARY OF THE INVENTION
According to one aspect of the invention there is provided a blade for a mixing device for the mixing of different substances, the blade adapted to being mounted on a rotor having a substantially horizontal rotational axis and a direction of rotation, and the mixing device having a direction of motion of the substances being mixed parallel to the rotor axis, the blade when mounted on the rotor extending in a straight line perpendicular to the axis of the rotor, the blade having a cross-section which is curved with a first portion facing in the direction of motion of the substances, a second substantially smaller portion facing opposite the direction of motion of the substances, and a portion lying between and connecting the first and second portions and being substantially parallel with the rotor axis, whereby when the rotor with such blade is rotated, a substantial portion of the substances being mixed are thrown in the direction of motion and smaller portions are thrown directly radially outwards and opposite to the direction of motion.
It has now been found that altering the shape of the blades may further optimize the mixing process, and result in other advantages.
These advantages are achieved with blades according to the present invention as defined in the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Some embodiments of the invention will now be described in conjunction with the accompanying drawings in which:
FIG. 1 is an axial schematic view of a mixing device having two rotors.
FIG. 2 is a view looking down a blade according to this invention toward the rotor axis.
i i~ . I i~ I I~i " I
SUMMARY OF THE INVENTION
According to one aspect of the invention there is provided a blade for a mixing device for the mixing of different substances, the blade adapted to being mounted on a rotor having a substantially horizontal rotational axis and a direction of rotation, and the mixing device having a direction of motion of the substances being mixed parallel to the rotor axis, the blade when mounted on the rotor extending in a straight line perpendicular to the axis of the rotor, the blade having a cross-section which is curved with a first portion facing in the direction of motion of the substances, a second substantially smaller portion facing opposite the direction of motion of the substances, and a portion lying between and connecting the first and second portions and being substantially parallel with the rotor axis, whereby when the rotor with such blade is rotated, a substantial portion of the substances being mixed are thrown in the direction of motion and smaller portions are thrown directly radially outwards and opposite to the direction of motion.
It has now been found that altering the shape of the blades may further optimize the mixing process, and result in other advantages.
These advantages are achieved with blades according to the present invention as defined in the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
Some embodiments of the invention will now be described in conjunction with the accompanying drawings in which:
FIG. 1 is an axial schematic view of a mixing device having two rotors.
FIG. 2 is a view looking down a blade according to this invention toward the rotor axis.
i i~ . I i~ I I~i " I
FIG. 3 is a corresponding view of an alternative blade form.
DETAILED DESCRIPTION
FIG. 1 is an axial schematic view of a mixing device shown generally at having a container 11 and two rotors 12 and 12', rotating in opposite directions as 5 shown by the arrows, with axes shown by the crosses. Blades 1 and 1' are shown secured to rotors 12 and 12' respectively.
As shown in FIG. 1, the end of the blade remote from the rotor axis 12 is suitably bent upward to form a flange 2 or a flange 2 is secured to the blade, either as a continuous curvature or at an obtuse angle to the blade. The flange 2 points in the 10 direction of motion of the substances being mixed and extends substantially along the axial length of the blade.
Substances which are thrown radially outward along the blade 1 hit the flange 2 and thereby change their path. It is important that a substance thrown radially along the blade 1 will mostly hit the flange 2 and thereby change its direction instead of hitting the bottom of the container 11 of the mixing device; as this means that the wear on the bottom of the container is decreased, which is of substantial importance depending on the substances being mixed.
As shown in FIG. 1, it is important to have a blade with a curved cross-section to achieve a substantial distribution of the substances being mixed and an optimized high casting curvature 5.
FIG. 2 is a view looking down a first embodiment of a blade 1 according to this invention toward the axis of the rotor 12 to which the blade is secured. In this embodiment the blade 1 is formed as part of a pipe having a circular tubular cross-section. The pipe may conveniently be divided into four segments, each of 90°, so that the cross-section of the blade is a 90° circular arc. Each i i . I i~ i i ~ .. I
DETAILED DESCRIPTION
FIG. 1 is an axial schematic view of a mixing device shown generally at having a container 11 and two rotors 12 and 12', rotating in opposite directions as 5 shown by the arrows, with axes shown by the crosses. Blades 1 and 1' are shown secured to rotors 12 and 12' respectively.
As shown in FIG. 1, the end of the blade remote from the rotor axis 12 is suitably bent upward to form a flange 2 or a flange 2 is secured to the blade, either as a continuous curvature or at an obtuse angle to the blade. The flange 2 points in the 10 direction of motion of the substances being mixed and extends substantially along the axial length of the blade.
Substances which are thrown radially outward along the blade 1 hit the flange 2 and thereby change their path. It is important that a substance thrown radially along the blade 1 will mostly hit the flange 2 and thereby change its direction instead of hitting the bottom of the container 11 of the mixing device; as this means that the wear on the bottom of the container is decreased, which is of substantial importance depending on the substances being mixed.
As shown in FIG. 1, it is important to have a blade with a curved cross-section to achieve a substantial distribution of the substances being mixed and an optimized high casting curvature 5.
FIG. 2 is a view looking down a first embodiment of a blade 1 according to this invention toward the axis of the rotor 12 to which the blade is secured. In this embodiment the blade 1 is formed as part of a pipe having a circular tubular cross-section. The pipe may conveniently be divided into four segments, each of 90°, so that the cross-section of the blade is a 90° circular arc. Each i i . I i~ i i ~ .. I
segment, which forms a blade, is secured to the rotor axis as shown in FIG. 2, with the segment turned an angle .alpha. in relation to the rotor axis. A suitable angle .alpha. is about 20°; resulting in the cross-section of the blade having a larger first portion or front part 3, a smaller second portion or rear part 4, and a part 6 lying between and connecting the front part 3 and rear part 4 and being substantially parallel to the axis of the rotor 12. By this arrangement, part of the substances to be mixed are influenced by the front part 3 of the blade, and are transported forwards in the transportation direction of the mixing device (shown by the arrow), and another part are influenced by the rear part 4 of the blade and are transported backwards in a direction opposite to the transportation direction of the mixing device. The curved form of the blade 1 thus provides a substantial dispersal of the substances being thrown up by the blade; with substances thrown backwards being mixed with substances thrown forwards by a following blade.
FIG. 3 is a view looking down a second embodiment of a blade 1 of this invention towards the rotor axis 12. In this embodiment, the cross-section of the blade is not a circular arc, but is a curved surface having a front part 3, a rear part 4, and a part 6 lying between and connecting the front part 3 and rear part 4. The transportation direction of the mixing device is indicated by the arrow. In this embodiment, the rear part 4 of the blade still provides a greater distribution of the substances being mixed, causing a portion to have no movement parallel to the rotor axis in the transportation direction of the mixing device and a portion to be moved in a direction opposite to the transportation direction of the mixing device.
FIG. 3 is a view looking down a second embodiment of a blade 1 of this invention towards the rotor axis 12. In this embodiment, the cross-section of the blade is not a circular arc, but is a curved surface having a front part 3, a rear part 4, and a part 6 lying between and connecting the front part 3 and rear part 4. The transportation direction of the mixing device is indicated by the arrow. In this embodiment, the rear part 4 of the blade still provides a greater distribution of the substances being mixed, causing a portion to have no movement parallel to the rotor axis in the transportation direction of the mixing device and a portion to be moved in a direction opposite to the transportation direction of the mixing device.
Claims (2)
1. A blade for a mixing device for the mixing of different substances, the blade adapted to being mounted on a rotor having a substantially horizontal rotational axis and a direction of rotation, and the mixing device having a direction of motion of the substances being mixed parallel to the rotor axis, the blade when mounted on the rotor extending in a straight line perpendicular to the axis of the rotor, the blade having a cross-section which is curved with a first portion facing in the direction of motion of the substances, a second substantially smaller portion facing opposite the direction of motion of the substances, and a portion lying between and connecting the first and second portions and being substantially parallel with the rotor axis, whereby when the rotor with such blade is rotated, a substantial portion of the substances being mixed are thrown in the direction of motion and smaller portions are thrown directly radially outwards and opposite to the direction of motion.
2. A blade according to claim 1 where the blade has an axial length along the axis of the rotor and has a first end adapted to being mounted on the rotor and a second end remote from the axis of the rotor, where the second end comprises a flange which creates an obtuse angle with the blade and extends substantially along the entire axial length of the blade.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/NO1994/000174 WO1996014142A1 (en) | 1994-11-03 | 1994-11-03 | A blade for a mixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2180136A1 CA2180136A1 (en) | 1996-05-17 |
| CA2180136C true CA2180136C (en) | 2006-08-29 |
Family
ID=19907752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002180136A Expired - Lifetime CA2180136C (en) | 1994-11-03 | 1994-11-03 | A blade for a mixing device |
Country Status (18)
| Country | Link |
|---|---|
| EP (1) | EP0738182B1 (en) |
| JP (1) | JPH09510661A (en) |
| AT (1) | ATE188886T1 (en) |
| AU (1) | AU680331B2 (en) |
| BR (1) | BR9408468A (en) |
| CA (1) | CA2180136C (en) |
| CZ (1) | CZ292426B6 (en) |
| DE (1) | DE69422732T2 (en) |
| DK (1) | DK0738182T3 (en) |
| ES (1) | ES2142415T3 (en) |
| GR (1) | GR3032385T3 (en) |
| HU (1) | HU221158B1 (en) |
| NO (1) | NO177415C (en) |
| PL (1) | PL176493B1 (en) |
| PT (1) | PT738182E (en) |
| RU (1) | RU2121394C1 (en) |
| UA (1) | UA29496C2 (en) |
| WO (1) | WO1996014142A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO177415C (en) * | 1994-11-03 | 1995-09-13 | Geir Nordahl | Mixes with double curved blades |
| RU2301771C1 (en) * | 2005-12-06 | 2007-06-27 | Институт прикладной механики УрО РАН | Method and device for mixing nano-particles |
| US10260803B2 (en) | 2013-05-22 | 2019-04-16 | Waister As | Method, a system and devices for processing at least one substance in a dried, fragmented, fluidized end product |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2525362C3 (en) * | 1975-06-06 | 1979-12-13 | Hans 4930 Detmold Kimmel | Mixing blades on a rotating mixing tool |
| DE2803407C2 (en) * | 1978-01-26 | 1982-12-02 | Hans 4930 Detmold Kimmel | Stirring tool |
| DE3325095A1 (en) * | 1983-07-12 | 1985-01-24 | Wacker-Chemie GmbH, 8000 München | DEVICE FOR CARRYING OUT A RADICAL POLYMERIZATION AND ITS USE |
| SU1588434A1 (en) * | 1987-12-14 | 1990-08-30 | Ростовский-На-Дону Институт Сельскохозяйственного Машиностроения | Mixer working member |
| SU1722556A1 (en) * | 1990-04-06 | 1992-03-30 | Экспериментальный Ремонтно-Механический Завод Главмосплодовощпрома Мосгорисполкома | Mixer |
| NO176552C (en) * | 1990-12-06 | 1995-04-26 | Geir Nordahl | Continuous mixer |
| NO177415C (en) * | 1994-11-03 | 1995-09-13 | Geir Nordahl | Mixes with double curved blades |
-
1993
- 1993-05-05 NO NO931642A patent/NO177415C/en not_active IP Right Cessation
-
1994
- 1994-11-03 DK DK94932180T patent/DK0738182T3/en active
- 1994-11-03 JP JP8515213A patent/JPH09510661A/en active Pending
- 1994-11-03 RU RU96116150A patent/RU2121394C1/en not_active IP Right Cessation
- 1994-11-03 HU HU9602102A patent/HU221158B1/en not_active IP Right Cessation
- 1994-11-03 ES ES94932180T patent/ES2142415T3/en not_active Expired - Lifetime
- 1994-11-03 PL PL94315251A patent/PL176493B1/en unknown
- 1994-11-03 AT AT94932180T patent/ATE188886T1/en not_active IP Right Cessation
- 1994-11-03 DE DE69422732T patent/DE69422732T2/en not_active Expired - Fee Related
- 1994-11-03 CA CA002180136A patent/CA2180136C/en not_active Expired - Lifetime
- 1994-11-03 EP EP94932180A patent/EP0738182B1/en not_active Expired - Lifetime
- 1994-11-03 UA UA96072997A patent/UA29496C2/en unknown
- 1994-11-03 CZ CZ19962268A patent/CZ292426B6/en not_active IP Right Cessation
- 1994-11-03 BR BR9408468A patent/BR9408468A/en not_active IP Right Cessation
- 1994-11-03 AU AU12850/95A patent/AU680331B2/en not_active Ceased
- 1994-11-03 PT PT94932180T patent/PT738182E/en unknown
- 1994-11-03 WO PCT/NO1994/000174 patent/WO1996014142A1/en not_active Ceased
-
2000
- 2000-01-20 GR GR990402706T patent/GR3032385T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0738182B1 (en) | 2000-01-19 |
| WO1996014142A1 (en) | 1996-05-17 |
| HU9602102D0 (en) | 1996-11-28 |
| JPH09510661A (en) | 1997-10-28 |
| CZ226896A3 (en) | 1997-03-12 |
| ES2142415T3 (en) | 2000-04-16 |
| PT738182E (en) | 2000-06-30 |
| NO931642L (en) | 1994-11-07 |
| AU680331B2 (en) | 1997-07-24 |
| ATE188886T1 (en) | 2000-02-15 |
| DE69422732T2 (en) | 2000-07-06 |
| AU1285095A (en) | 1996-05-31 |
| HUT76177A (en) | 1997-07-28 |
| NO177415C (en) | 1995-09-13 |
| UA29496C2 (en) | 2000-11-15 |
| CA2180136A1 (en) | 1996-05-17 |
| GR3032385T3 (en) | 2000-04-27 |
| RU2121394C1 (en) | 1998-11-10 |
| BR9408468A (en) | 1997-09-16 |
| NO177415B (en) | 1995-06-06 |
| NO931642D0 (en) | 1993-05-05 |
| HU221158B1 (en) | 2002-08-28 |
| DE69422732D1 (en) | 2000-02-24 |
| PL176493B1 (en) | 1999-06-30 |
| DK0738182T3 (en) | 2000-05-01 |
| CZ292426B6 (en) | 2003-09-17 |
| EP0738182A1 (en) | 1996-10-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20141103 |