JP2583336Y2 - Rotary shaft support device - Google Patents

Description

[Detailed description of the invention]

[0001]

The apparatus for supporting a rotating shaft according to the present invention is such that, for example, a rotating shaft such as a stirring shaft which is incorporated in a jar fermenter and used to stir a culture solution is troublesome to handle. It is intended to prevent the tip of the rotating shaft from being shaken with the rotation while being provided in a cantilevered manner without any rotation.

[0002]

2. Description of the Related Art For example, when culturing various microorganisms using a jar fermenter, a culture solution is stirred by rotating a stirring shaft provided with stirring blades.
FIG. 2 shows an example in which the stirring shaft in the jar fermenter is rotatable by a magnetic coupling. First, the stirring shaft 1 shown in FIG. 2 will be described.

An intermediate cylinder 4 having a cylindrical wall 3 whose upper end is closed is fixed to a bottom wall 2 of a stirring vessel for stirring a culture solution. A support cylinder 6 is rotatably fitted to the cylindrical wall 3 of the intermediate cylinder 4 via sliding bearings 5 and 5. The base end (the lower end in FIG. 2) of the stirring shaft 1 is fixed to the distal end (the upper end in FIG. 2) of the support cylinder 6 by welding or a flange. The second magnet 7 constituting the ring is supported.

On the other hand, a distal end (upper end in FIG. 2) of a drive shaft 8 which is driven to rotate by a motor or the like has a first magnet 9 constituting a magnetic coupling fixed to an outer peripheral surface thereof. It is inserted into the cylindrical wall 3 of the intermediate cylinder 4. In this state, the first magnet 9 concentrically faces the second magnet 7.

When the drive shaft 8 is rotated by a motor (not shown), the first magnet 9 provided on the drive shaft 8 and the first magnet 9 magnetically coupled to the first magnet 9 are formed. The stirring shaft 1 coupled to the front end surface of the support cylinder 6 rotates via the second magnet 7 and the support cylinder 6 to which the second magnet 7 is fixed. As a result, the culture solution in the stirring vessel is stirred by the rotation of the stirring blade provided at the tip of the stirring shaft 1 or the like.

[0006]

However, the stirring shaft provided in the jar fermenter described above has the following disadvantages.

That is, the stirring shaft 1 has a base end fixed to the tip end surface of the support tube 6 in a cantilever manner, and the tip end is not supported. When the rotary shaft 1 is rotated, the tip of the stirring shaft 1 may shake with the rotation. It is not preferable that the tip of the stirring shaft 1 is shaken as it is rotated, because it adversely affects the normal operation of the jar fermenter. Further, when a rotating shaft having the same configuration as the above-described stirring shaft 1 is used for another device, normal operation of the device is prevented for the same reason, and noise is generated.

In order to solve the above-mentioned inconvenience, FIGS.
As shown in FIG. 2, a double-supported stirring shaft in which the tip end (upper end in FIG. 4) of the stirring shaft 1 is supported by a stirring arm 11 by a support arm 10 is also considered. That is, a sleeve ring 14 is provided on the outer peripheral surface of the distal end portion of the stirring shaft 1 via a sleeve 12 and a slide bearing 13, and a support arm provided at the other end of the support arm 10 having one end fixed to the inner surface of the stirring vessel 11. Tube 15
The ends of a plurality (four in the illustrated example) of bolts 16, which are loosely fitted on the outer periphery of the sleeve ring 14 and further screwed from the outer surface of the support short cylinder 15, are connected to the sleeve ring 1.
4 against the outer peripheral surface.

As a result of the above construction, even when the stirring shaft 1 is rotated, its base end is fixed to the support cylinder 6. The tip of the stirring shaft 1 is fixed to the other end of the support arm 10. Is rotatably supported via the slide bearing 13 inside the sleeve ring 14, so that it does not shake with rotation.

However, in the above-described support structure, the following disadvantages are newly generated. That is, the stirring vessel 1
Since various members such as the support arm 10 exist inside the unit 1, these members hinder the handling of the apparatus, maintenance and inspection, and the like. For this reason, it has been desired to provide a support device that is not troublesome to handle, that is, a cantilever type, and in which the rotating shaft such as the stirring shaft 1 does not shake with the rotation. The device for supporting a rotating shaft according to the present invention has been conceived in view of the above-described circumstances.

[0011]

SUMMARY OF THE INVENTION A rotary shaft supporting device according to the present invention is a supporting device for supporting a rotatable rotary shaft by driving means , and is provided above a cylindrical wall portion forming an upper portion of an intermediate cylinder.
At the end, the center shaft is connected concentrically with the intermediate cylinder to support the united connection
Form a shaft, insert this integrally connected support shaft into the container,
The lower part is attached to the bottom wall of the container in a liquid-tight manner,
At the upper end of the support cylinder, which is rotatably fitted around the
The agitating shaft, which is rotatably fitted on the outside, is concentrically connected, and the
A first bearing formed at a lower portion of the cylindrical wall portion, forming a rolling shaft;
Through a second bearing provided above the central shaft, the
The rotating shaft is externally fitted to the rotating self-standing integrally coupled support shaft inserted into the intermediate cylinder
With the first magnet attached to the drive shaft to be inserted
The second magnet making up the coupling is the same as the first magnet
The support of the rotating shaft mounted on the outer circumference of the support cylinder facing the center
The object has been achieved by obtaining a holding device.

[0012]

[Action] is at the aforementioned supporting device for a rotary shaft of the present invention constructed as, around the integrally connected support shaft is a solid tough min, integrally coupled rotating shaft rotates, but the integrally coupled rotation axis
Only the lower part is supported by the intermediate cylinder by the first bearing.
The upper part is the outer peripheral surface of the upper part of the central shaft of the integrally connected support shaft.
Since it is supported by the second bearing provided in the, it does not shake with rotation. Moreover, integrally connected support shaft for supporting the integrally connected axis of rotation, in order to present to the inside of the integrally connected axis of rotation, it does not become in the way of handling.

[0013]

Next, a description will be given of an example in which the rotating shaft support device of the present invention is applied to a stirring shaft of a jar fermenter.

FIG. 1 shows a rotation in a jar fermenter.
Stirring shaft 1 is an axis, and shows the driving means der luma Gunetto coupling for rotating the stirring shaft 1. Same as that shown in FIG. 2, fixes the lower portion of the intermediate cylinder 4 on the bottom wall 2 of the stirred vessel, in the intermediate cylinder 4, the lower portion of the cylindrical wall portion 3 constituting the upper part of its <br/> the support cylinder 6 rotatably through the first the slip bearing 5 provided are fitted. On the inner side of the intermediate cylinder 4, it is inserted a drive shaft 8 which is fixed a first magnet 9, outside the peripheral surface of the support cylinder 6, at a position opposed to the first magnet 9 and concentrically, to secure the second magnet 7
This constitutes a magnet coupling as a driving means.

The tip of the support cylinder 6 on which the second magnet 7 is mounted
End to the top plate 19 for closing the (upper end in FIG. 1) is rigid nonmagnetic having material (for example, non-magnetic stainless steel) was formed by Ri to medium superficial shape, the base end of the stirring shaft 1 is rotating axis The support tube 6 and the stirring shaft 1 are welded or fixed by a flange or the like so that the support cylinder 6 and the stirring shaft 1 are concentric with each other, and are integrally connected.
A combined rotation axis A is formed .

A top for closing the upper end of the cylindrical wall 3 of the intermediate cylinder 4
The plate 20, also the base end portion of the hollow cylindrical center axis 17 (lower end in FIG. 1), these intermediate cylinder 4 and the center axis 17 and is concentric to become welded as one another, or fixed by a flange or the like As a result, an integrally connected support shaft B is formed.

The outer diameter of the central shaft 17, formed smaller than the inner diameter of the stirring shaft 1, the central axis 17, the inside of the stirring shaft 1, the central axis 17 and agitator shaft 1 and the like is concentric with each other It is fitted inside. Then, the tip portion of the stirring shaft 1 (upper part of FIG. 1), via the second the slip bearing 18, and rotatably supported on the distal end of the central shaft 17 (the upper end in FIG. 1) I have.

As a result of the above configuration, when the drive shaft 8 is rotated by a motor (not shown), the first and second magnets are rotated.
Via the magnet coupling composed of 9 and 7,
Integrally coupling the rotation axis A of the support cylinder 6 and stirring shaft 1, the integral
It rotates around the joint support shaft B , and the stirring blade (not shown) provided on the stirring shaft 1 rotates to stir the culture solution. At this time, the upper end portion of the stirring shaft 1, the second through the sliding bearing 18 is supported on the central shaft 17, the support tube 6 that is coupled to the stirring shaft
Since the lower portion is supported by a cylindrical wall portion 3 through the first sliding bearing 5, stirring shaft 1 it will not be blurred with the rotation. Since the cylindrical wall portion 3 has a relatively large diameter because the drive shaft 8 and the first magnet 9 are inserted therein, the support shaft 17 can be firmly supported without making the bottom wall 2 of the container particularly thick. it can. Since the first and second magnets 9 and 7 constituting the magnet coupling are arranged concentrically in a direction perpendicular to the stirring shaft 1, the stirring shaft 1 applies a thrust load to the support shaft 17 due to magnetic force. Therefore, the stirring shaft 1 can rotate smoothly.

Also, an integrally coupled rotary shaft A including the stirring shaft 1
It said integrally coupled support shaft B for supporting is present inside the stirring shaft 1, the like the supporting structure shown in Figure 3-4, the members for supporting the tip portion of the stirring shaft 1 Since it does not exist, the support member does not interfere with handling.

In this embodiment, an example in which the present invention is applied to a stirring shaft of a jar fermenter has been described. However, the rotating shaft supporting device of the present invention is not limited to this.
It can be applied to various devices having a rotation axis. In the present embodiment, the central shaft 17 is formed in a hollow cylindrical shape for the purpose of weight reduction, but this may be a solid body. Also, first,
Rolling or the like in place of the second the slip bearing 5 and 18, may be employed other bearing.

[0021]

Supporting device for a rotary shaft of the present invention, according to the invention], in order to act is constructed as described above, cumbersome to handle as when the rotational shaft was set to conventional double-sided as in FIGS. 3 and 4 It is possible to prevent blurring due to the rotation of a rotating shaft such as a stirring shaft without becoming unsteady. Also, unlike the hub driving device described in Japanese Utility Model Application Laid-Open No. 58-173050, a large space is not required in the diameter direction of the rotating shaft, no thrust load is applied to the rotating shaft, and cleaning is easy, and Suitable for use in.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing the present invention.

FIG. 2 is a longitudinal sectional view showing a conventional example.

FIG. 3 is a plan view showing a support structure of a tip portion of a stirring shaft.

FIG. 4 is a longitudinal sectional view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Stirring shaft 2 Bottom wall 3 Cylindrical wall part 4 Intermediate cylinder 5 First sliding bearing 6 Support cylinder 7 Second magnet 8 Drive shaft 9 First magnet 10 Support arm 11 Stirring vessel 12 Sleeve 13 Sliding bearing 14 Sleeve ring 15 Support short cylinder 16 Bolt 17 Center shaft 18 Second slide bearing 19 Top plate 20 Top plate A Integrated rotation shaft B Integrated support shaft

Claims (1)

(57) [Scope of request for utility model registration] 1. A central shaft is concentrically coupled to an upper end of a cylindrical wall forming an upper portion of an intermediate cylinder to form an integrally coupled support shaft, and the integral coupled support shaft is inserted into a container. Then, a lower part thereof is liquid-tightly attached to a bottom wall of the container, and a stirring shaft rotatably fitted to the center shaft is concentrically connected to an upper end of a support cylinder rotatably fitted to the cylindrical wall. Forming an integrally coupled rotating shaft, and allowing the integrally coupled rotating shaft to rotate freely on the integrally coupled supporting shaft via a first bearing provided at a lower portion of the cylindrical wall portion and a second bearing provided at an upper portion of the central shaft. A second magnet, which is externally fitted and forms a magnet coupling together with a first magnet attached to a drive shaft inserted into the intermediate cylinder, is attached to the outer periphery of the support cylinder in a manner concentrically opposed to the first magnet. Rotary shaft support device.