• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Agitator (2) for a stirred tank (20), which agitator (2) comprises a stirring head (1), a drive unit (4), and a magnetic coupling (3), wherein the magnetic coupling (3) with the drive unit (4) connected drive magnets (5) and mixing head magnets (6) connected to the stirring head (1), wherein the stirring head (1) has stirring blades (7), and a bearing arrangement (8), and the stirring blades (7) with the stirring - head magnets (6) and Bearing assembly (8) are connected, wherein the bearing assembly (8) rotatably supports the stirring head (1), and the bearing assembly (8) comprises a first rotary bearing (9), wherein the bearing assembly (8) comprises a second rotary bearing (10) spaced from the first rotary bearing (9) in the mixing head (1) is arranged.
    公开号:AT518668A4
    申请号:T50053/2017
    申请日:2017-01-25
    公开日:2017-12-15
    发明作者:Karl Münzer Ing；Ing Nicole Zangl Dipl；Trummer Erwin
    申请人:Zeta Biopharma Gmbh；
    IPC主号:
    专利说明:

    Agitator for a stirred tank
    The invention relates to an agitator for a stirred tank, which agitator comprises a stirring head, a drive unit, and a magnetic coupling, wherein the magnetic coupling with the drive unit connected drive magnets and the stirring head associated Rührkopfmagnete, wherein the stirring head agitator, and a bearing assembly, and the Agitator blades are connected to the Rührkopfmagneten and the bearing assembly, wherein the bearing assembly rotatably supports the stirring head, and the bearing assembly comprises a first rotary bearing. Stirring agitators are used for example in the biopharmaceutical industry, the food industry, and in particular in the field of aseptic liquid production processes. Typical designs of such stirred tanks are gas-tight and closable, vessel-shaped containers made of metal or glass, which ensure easy cleaning and sterilization and thus multiple use. The mixing of a stirring medium received in the stirred container takes place within the stirred container by means of a stirring head, which has stirring blades and which, depending on the application and the design of the stirred container, is connected to a stirring shaft with stirring shaft blades arranged thereon. In conventional agitators, the drive unit is connected to the stirring head by means of a mechanical seal. However, by means of a mechanical seal sealed agitators have the disadvantage that leaks can occur on the seal. Furthermore, the maintenance of this type of seal is labor-intensive and cost-intensive, with the leakage in the minimum range when properly maintained. In the pharmaceutical and food industry, however, this leakage and the associated contamination of the stirring medium is a high risk. Therefore, in these industries are increasingly set of sliding ring sealed agitators on agitators with magnetic coupling, which are also referred to as magnetic stirrers. The storage of the stirring of such agitators via a rotary bearing, such as a plain bearing. EP 1 748 201 B1 discloses an agitator which has a magnetic coupling between the drive unit and agitator. This further includes a rotary bearing in the form of a sliding bearing, which is lubricated by the stirring medium within the container.
    A disadvantage has been found in such constructions that the rotary bearing limits the applied torque of the drive unit, the maximum speed, the size of the stirring blades, and the length of the stirring shaft. An increase in these properties leads to increased vibration on the stirring head, and subsequently mechanical damage.
    It is the object of the present invention to form a stirrer which avoids the disadvantages of the above-mentioned constructions.
    According to the invention, the present object is achieved in that the bearing arrangement comprises a second rotary bearing, which is arranged at a distance from the first rotary bearing in the stirring head.
    The embodiment of the agitator according to the invention provides a split bearing of the stirring head, whereby the advantages of a higher stability, load capacity and service life of the stirring head over the prior art are achieved. This allows in particular further modifications to the remaining components of the agitator, such as an increased power of the drive unit.
    Furthermore, the embodiment of the agitator according to the invention offers the advantage that the increased load capacity of the bearing arrangement reduces the probability of bearing fractures. These usually entail expensive maintenance and repair work and associated downtime. In addition, bearing fractures can lead to contamination of the stirring medium, whereby the stirring medium is no longer processable, and must be disposed of. The increased load capacity of the bearing assembly offers the particular advantage that longer stirrer shafts can be used, which lead to increased vibrations of the stirrer shaft, and thus a stronger load on the bearing assembly of the stirring head. As a result, the stirrer according to the invention, in comparison to agitators of the prior art, can be used in larger stirred containers. Furthermore, stirring media can be processed thereby, which have a greater inhomogeneity compared to the prior art.
    It is particularly advantageous that increased rotational speeds of the stirring head can be achieved by the available higher drive power, whereby a stronger mixing of the stirring medium is ensured. Furthermore, larger impellers, as well as larger agitator blades can be used. This also allows larger volume stirred vessels to be used, or to handle agitating media of higher viscosity or greater inhomogeneity.
    Advantageous embodiments of the agitator according to the invention and alternative embodiments will be explained in more detail with reference to the figures.
    Figure 1 shows a section through a stirring head of an agitator according to the invention in a front view with a closed magnetic coupling.
    Figure 2 shows a section through the stirring head of Figure 1 in the disassembled state in a front view.
    Figure 3 shows a section through a stirred tank with a stirrer according to the Invention in frontal view.
    FIG. 1 shows a preferred embodiment variant of a stirring head 1 of an agitator 2 according to the invention, which is shown completely in FIG. 3, with a closed magnetic coupling 3. The agitator 2 comprises the stirring head 1, a drive unit 4, which is shown in FIG. 3, and the magnetic coupling 3. The magnetic coupling 3 includes drive magnets 5 and Rührkopfmagnete 6, wherein the Rührkopfmagnete 6 are rigidly connected to the stirring head 1. The drive magnets 5 are in turn connected to the drive unit 4. In operation, the drive unit 4 sets the drive magnets 5, which are magnetically coupled to the Rührkopfmagneten 6, in rotation. As a result, a rotational movement of the drive magnets 5 is transmitted to the Rührkopfmagnete 6, and the stirring head 1 is rotated to mix a stirring medium.
    Furthermore, the stirring head 1 comprises stirring blades 7 and a bearing arrangement 8. The bearing arrangement 8 is constructed from a first rotation bearing 9 and a second rotation bearing 10, which are arranged at a distance from one another in the stirring head 1. The stirring vanes 7 establish a rigid connection of the stirring head magnets 6 with the first rotation bearing 9 and the second rotation bearing 10. The split construction of the bearing assembly 8 by means of the first rotary bearing 9 and the second rotary bearing 10 offers the advantage that loads received by the bearing assembly 8 are divided. This offers the advantage that in this way a higher stability, load capacity and service life of the bearing assembly 8 over the prior art is achieved. In the preferred embodiment variant shown in FIG. 1, the first rotary bearing 9 is located closer to the magnetic coupling 3 than the second rotary bearing 10.
    The stirring head 1 additionally allows the inclusion of a stirring shaft 11 shown in Figure 3 with arranged at this Rührwellenflügeln 12 at the opposite end of the magnetic coupling 3 of the stirring head. 1
    The first rotary bearing 9 and the second rotary bearing 10 are designed in the preferred embodiment as a sliding bearing with sliding surfaces 13. The first rotary bearing 9 and the second rotary bearing 10 are hereby lubricated by the stirring medium, which is mixed by the agitator 2. This embodiment offers the advantage of a particularly simple and resistant construction of the stirring head 1, with a small number of moving parts. Furthermore, this structure facilitates disassembly of the stirring head 1 from the agitator 2. Particularly preferred is the design of the sliding surfaces 13 of ceramic materials, metallic materials, or polymer compounds such as PEEK, or any combination of these materials. The sliding surfaces 13 may additionally have a coating, such as a diamond coating. This offers the advantage of a particularly low wear. In alternative embodiments, other forms of rotary bearings 9 and 10, such as ball bearings or roller bearings, can be used. Other forms of rotary bearings 9 and 10 will be apparent to those skilled in the art from this exemplary reference.
    Between the sliding surfaces 13 of the first rotary bearing 9 is a first bearing gap 14, and between the sliding surfaces 13 of the second rotary bearing 10 there is a second bearing gap 15. These bearing gaps 14 and 15 have due to the construction of rotary bearings a circular cross section, which has a first bearing gap diameter 16 for the first rotary bearing 9 and a second bearing gap diameter 17 for the second rotary bearing 10 has.
    Furthermore, the first rotary bearing 9 has a first width 18, and the second rotary bearing 10 has a second width 19, which represent the dimensions of the rotary bearings 9 and 10 normal to the bearing gap diameter 16 and 17.
    In the preferred embodiment variant of the stirring head 1 shown in FIG. 1, the first bearing gap diameter 16 differs from the second bearing gap diameter 17 and the first width 18 differs from the second width 19. This has the advantage that vibrations occurring at the stirring head 1 are caused by the second rotation bearing 10 are received, and only attenuated about the Rührkopfflügel 7 are delivered to the first rotary bearing 9. In addition, there is a load distribution within the camp order 8, which suppresses unwanted oscillation of the stirring head 1.
    In particular, in the preferred embodiment variant shown in FIG. 1, the first width 18 and the first bearing gap diameter 16 are greater than the second width 19 and the second bearing gap diameter 17. This ensures that, when the bearing assembly 8 is loaded, the probability of a bearing breakage of the second rotation bearing This is advantageous because the second rotary bearing 10 has smaller dimensions than the first rotary bearing 9, and thus is cheaper to replace.
    The agitator head 1 shown in Figure 1 allows, as already mentioned, the recording of the agitator shaft 11 shown in Figure 3 with the arranged at this Rührwellenflügeln 12 at the opposite end of the magnetic coupling 3 of the stirring head 1. The above-mentioned ratios of the first width 18 and the second width 19, and the first bearing gap diameter 16 and the second bearing gap diameter 17 are particularly advantageous when using long stirrer shafts 11, to which stronger vibrations can occur to suppress unwanted oscillation of the stirring head 1.
    In the preferred embodiment of the agitator 2, the first rotary bearing 9 is connected exclusively to the second rotary bearing 10 via the agitating blades 7. This offers the advantage of a particularly stable connection, at the same time low material usage and a damped vibration transmission between the rotary bearings 9 and 10.
    Ligur 2 shows the stirring head 1 according to Ligur 1, in a disassembled from the agitator 2 state. For this purpose, the magnetic coupling 3 was opened, wherein the drive magnets 5 were separated from the Rührkopfmagneten 6. Furthermore, the sliding surfaces 13 of the first rotation bearing 9 and the second rotation bearing 10 were separated.
    Ligur 3 shows the agitator 2 according to the invention, installed in a stirred tank 20. In the illustrated, preferred embodiment variant of the stirred tank 20, the agitator 2 is installed on a tank bottom of the stirred tank 20. In an alternative embodiment variant, the agitator 2 is installed on a container lid of the stirring container 20, which container lid can also be made detachable. The drive unit 4 is located outside of the stirred tank 20. The stirred tank 20 can be filled with the stirring medium, which can then be mixed by the rotational movement of the stirring head 1. The agitator 2 in Figure 3 further comprises the agitator shaft 11, on which the stirring shaft blades 12 are arranged. The stirring shaft 11 is rigidly connected to the stirring head 1 and has the advantage that a homogeneous mixing of the stirring medium in the entire stirring container 20 is ensured by means of the stirring shaft blades 12. The inventive design of the agitator 2 offers the advantage of differently shaped stirring blades 7, and to apply stirrer shafts 11 with different lengths and Rührwellenflügeln 12. This makes it possible for the agitator 2 according to the invention in a variety of different forms of stirred containers 20 and, as shown in Figure 3, at the container bottom of the stirred tank 20 and on the container lid, not shown in Figure 3 to install. This offers the advantage that the agitator 2 according to the invention can be used in a large number of different stirred containers 20.
    权利要求:
    Claims (9)
    [1]
    claims:
    1. agitator (2) for a stirred tank (20), which agitator (2) comprises a stirring head (1), a drive unit (4), and a magnetic coupling (3), wherein the magnetic coupling (3) to the drive unit (4) comprising connected drive magnets (5) and stirring head magnets (6) connected to the stirring head (1), the stirring head (1) having stirring blades (7), and a bearing arrangement (8), and the stirring blades (7) being equipped with the stirring magnet heads (6). and the bearing assembly (8), wherein the bearing assembly (8) rotatably supports the stirring head (1), and the bearing assembly (8) comprises a first rotation bearing (9), characterized in that the bearing assembly (8) comprises a second rotation bearing (8). 10), which is spaced from the first rotary bearing (9) in the mixing head (1) is arranged.
    [2]
    2. Agitator (2) according to claim 1, characterized in that the first rotary bearing (9) has a first bearing gap diameter (16), and the second rotary bearing (10) has a second bearing gap diameter (17) which extends from the first bearing gap diameter (16). different.
    [3]
    3. Agitator (2) according to one of the preceding claims, characterized in that the first rotary bearing (9) has a first width (18) and the second rotary bearing (10) has a second width (19) which extends from the first width (19). 18) differs.
    [4]
    4. agitator (2) according to claims 2 and 3, characterized in that the first bearing gap diameter (16) is greater than the second bearing gap diameter (17) and that the first width (18) is greater than the second width (19).
    [5]
    5. agitator (2) according to one of the preceding claims, characterized in that the agitator (2) comprises a stirring shaft (11) with Rührwellenflügeln (12) which is connected to the stirring head (1).
    [6]
    6. agitator (2) according to claim 1 or claims 4 and 5, characterized in that the first rotary bearing (9) exclusively via the stirring blades (7) with the second rotary bearing (10) is connected.
    [7]
    7. agitator (2) according to one of the preceding claims, characterized in that the first rotary bearing (9) and the second rotary bearing (10) are designed as plain bearings.
    [8]
    8. agitator (2) according to claim 7, characterized in that the first rotary bearing (9) and the second rotary bearing (10) sliding surfaces (13) of at least one material from the group of ceramic materials, metallic materials, and polymer compounds, wherein the sliding surfaces (13) may have a coating.
    [9]
    A stirring container (20) for stirring a stirring medium, comprising an agitator (2) according to any one of claims 1 to 8, which is arranged in a container bottom or in a removable container lid of the stirring container (20).
    类似技术:
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    同族专利:
    公开号 | 公开日
    DK3354334T3|2021-08-23|
    JP2018118243A|2018-08-02|
    EP3354334B1|2021-06-09|
    CN108339482A|2018-07-31|
    US10682617B2|2020-06-16|
    US20180207593A1|2018-07-26|
    KR20180087856A|2018-08-02|
    HK1255607A1|2019-08-23|
    SG10201800425UA|2018-08-30|
    RU2018102605A|2019-07-25|
    AT518668B1|2017-12-15|
    EP3354334A1|2018-08-01|
    CA2992188A1|2018-07-25|
    引用文献:
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    AT518668B1|2017-01-25|2017-12-15|Zeta Biopharma Gmbh|Agitator for a stirred tank|
    AT520184B1|2017-09-18|2019-02-15|Zeta Biopharma Gmbh|Stirring head with identification device|AT518668B1|2017-01-25|2017-12-15|Zeta Biopharma Gmbh|Agitator for a stirred tank|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50053/2017A|AT518668B1|2017-01-25|2017-01-25|Agitator for a stirred tank|ATA50053/2017A| AT518668B1|2017-01-25|2017-01-25|Agitator for a stirred tank|
    EP18150945.6A| EP3354334B1|2017-01-25|2018-01-10|Mixer for a mixing tank|
    DK18150945.6T| DK3354334T3|2017-01-25|2018-01-10|Stirring for a stirring container|
    SG10201800425UA| SG10201800425UA|2017-01-25|2018-01-17|Stirrer for a stirrer vessel|
    CA2992188A| CA2992188A1|2017-01-25|2018-01-17|Stirrer for a stirrer vessel|
    US15/876,721| US10682617B2|2017-01-25|2018-01-22|Stirrer for a stirrer vessel|
    KR1020180008299A| KR20180087856A|2017-01-25|2018-01-23|Stirrer for a stirrer vessel|
    JP2018009109A| JP2018118243A|2017-01-25|2018-01-23|Agitator for agitation container|
    CN201810062588.1A| CN108339482A|2017-01-25|2018-01-23|Blender for agitator vessel|
    RU2018102605A| RU2018102605A|2017-01-25|2018-01-24|Stirrer for agitator|
    HK18114737.9A| HK1255607A1|2017-01-25|2018-11-19|Stirrer for a stirrer vessel|
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