JPH01207123A - Agitating vessel device - Google Patents

Abstract

PURPOSE:To eliminate eccentricity, to realize stabilized high-speed rotation, and further to enhance durability of the title device by supporting a main agitating shaft on the main vessel body irrespective of the attachment and detachment of a lid. CONSTITUTION:The lower bearing 5 for supporting the main agitating shaft 7 arranged at the center of the main vessel body 3 is provided on the bottom in the main vessel body 3. A driven magnetic body 6 induced by the driving magnetic body 51 arranged outside the bottom of the main vessel body 3 is fixed to the shaft 7, and one or >=2 impellers 31-33 are fixed to the shaft 7. An upper bearing 8 is mounted on the shaft 7 to support the shaft 7, and fixed in the main vessel body 3 by a bearing support 20. An end plate 40 capable of being opened and closed irrespective of the shaft 7 is provided to the main vessel body 3. As a result, eccentricity is eliminated, stabilized high-speed rotation can be realized, and the durability of the device is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stirring tank device in which blades within the tank are rotated by magnetic induction for purposes such as fermentation and microbial culture.

(Prior Art) This type of device has a structure that isolates the inside and outside as much as possible to prevent contamination with bacteria during the cultivation, fermentation, and other processes. Therefore, there are many cases in which bearings such as a rotating shaft are also incorporated into the tank, and examples of this include Japanese Patent Publication No. 57-24748 and Japanese Patent Application Laid-Open No. 56-45752.

(Technical issue) However, if the stirring shaft is supported inside the tank, the shaft end must be inserted into and removed from the bearing provided on the inner surface of the lid each time the lid is opened or closed, which is troublesome. At the same time, it causes shaft runout.

The stirring shaft must be able to rotate at high speed without eccentricity.

The present invention solves the above problems, and its purpose is to provide a highly durable stirring tank device that eliminates eccentricity and achieves stable high-speed rotation by bearing the stirring main shaft on the tank body regardless of whether the lid is attached or removed. There is a particular thing.

(Technical Means) The present invention achieves the above object by providing a lower bearing at the bottom of the tank body for bearing the stirring main shaft disposed at the center of the tank body, and a magnetic drive body disposed outside the bottom of the tank body. A magnetic driven body guided by the magnetically driven body is fixed to the stirring main shaft, one or more blades are attached to the stirring main shaft, and an upper bearing is fitted into the stirring main shaft to support the blade at the upper part. It has a configuration in which the tank body is provided with an end plate that is fixed by a bearing support and can be opened and closed independently of the stirring main shaft.

(Example) Referring to the drawings, FIGS. 1 and 2 show an example in which the present invention is applied to a fermentation tank, in which 1 is a base, 2 is a frame, and 3 is a bracket on the front of the frame. The tank body is shown attached via 4. The tank body 3 has a cylindrical shape, and a lower bearing 5 and a magnetic follower 6 are provided at the inner bottom so as to coincide with the axis of the cylinder, and a stirring main shaft 7 is supported at the lower part. 8 is an upper bearing.

The lower bearing 5 is a thrust bearing 1 that receives the lower end of the stirring main shaft 7.
0, a radial bearing 11, and a thrust bearing 10.
The radial bearing 11 bears the load through collision between the ceramic protrusion 12 embedded in the lower end of the spindle and the ceramic tip 14 fixed at the center of the bearing holder 13 to receive it. It is composed of an outer ring 16 fitted within the bearing flange 15 of the holder 13, and an inner ring 18 inserted between the outer ring 16 and the small diameter end 11 of the stirring main shaft 7 (FIGS. 3 and 4).

The outer surface of the inner ring 18 of the radial bearing 11 and the sliding contact surface 19 of the outer ring 16 that slides thereon are given a special anti-friction finish by ceramic spraying and polishing.

The upper bearing 8 has an upper inner ring 21 and an upper outer ring 22 that are fitted into the stirring main shaft 7, and the upper outer ring 22 is connected to the bearing support 20.
It has a configuration in which it is fitted and screwed into a central support ring 24 supported by a plurality of omitted arms 23 at the center of the ring, and the sliding surfaces 25 of the inner and outer rings 21 and 22 are given the same anti-friction finish as described above. has been done. Three of the illustrated omitted arms 23 are attached to the upper fixed ring 26 at equal intervals radially, and are attached to the tank body 3.
It is attached by fitting it into the opening edge of the

The stirring main shaft 7 has two stirring blades 31.3 at the middle and lower positions.
2 is attached, and the defoaming blade 3 is also attached to a portion above the heat insulation jacket 30 attached to the outer periphery of the tank body 3.
3 is provided. Each blade 31 , 32 , 33 is fitted into the stirring main shaft 7 by a boss 34 , 35 , 36 , respectively, and is fastened by a set screw 37 .

The mirror plate 40 closes the opening of the tank body 3 and is screwed to the flange 41 of the opening 7. 42 and 43 indicate the bolt insertion holes. Since the main shaft 7 has a length that fits within the tank body 3, it can rotate independently of opening and closing of the end plate 40, which is convenient for rotation tests.

The magnetic joint 50 for the rotation is composed of the magnetic follower 6 provided in the lower bearing portion and the magnetic drive member 51 provided outside the bottom of the tank body 3, and each magnet 52.5
3 are placed facing each other.

The magnetic driven body 6 is fixed to the main shaft 7 at a boss portion 49 by a top set screw 48 that fits. The magnetic drive body 51 is the drive shaft 5
4, and a bearing member 55 into which the bearing member 55 is fitted is attached and supported by a bracket 56 to the frame, and is connected to a pulley 59 of a stirring motor 60 by a synchronized pulley 57 fixed to a drive shaft 54 and a drive cable 58. .

The equipment provided in the tank body 3 and the end plate 40 will be described as follows: 61 is a front viewing window, 62 is a hot water inlet for supplying water to the heat insulation jacket 30, 63 is an outlet thereof, and 64 is an inoculation port formed in the end plate 40. , 65 is also an air outlet, 66
is the temperature measuring port, 67 is the sampling port, 68 is the sparger,
Reference numeral 69 indicates an outlet, 70 indicates a buffer plate provided on the inner surface of the tank body, and 71 indicates an illumination port.

(Operation of the Invention) In the stirring tank device configured as described above, the stirring main shaft 7 is rotatably attached to the tank body 3 by the lower bearing 5 and the upper bearing 8, so when the end plate 40 is opened, the stirring blade 31
You can try turning etc.

When the stirring motor 60 is operated, the magnetic driven body 6 inside the tank body 3 is guided by the magnetic drive body 51 that rotates with the rotation of the drive shaft 54.
rotates, and the stirring blades 31, 32 and anti-foaming blades 33 provided on the stirring main shaft 7, which are integrated with it, rotate, so that the medium inside can be stirred.

The main shaft 7, which is provided with blades for stirring and the like by the device of the present invention, has its lower end supported by a lower bearing 5 consisting of a thrust bearing 10 and a radial bearing 11, and its upper part is fixed to the tank body 3 by an upper bearing 8. Since the upper and lower bearings are integrated with the tank body 3, smooth rotation of the main shaft 7 is guaranteed. Furthermore, the thrust bearing 10 is configured to be supported by abutment made of ceramic material, and the radial bearing 11 and upper bearing 8 are also subjected to anti-friction finishing by ceramic spraying, thereby minimizing resistance.

(Effects of the Invention) Therefore, the device of the present invention allows the stirring main shaft to be attached to the tank body with extremely high precision and firmness, and because the friction thereof can be significantly reduced, stable high-speed rotation can be realized. Operations such as stirring are carried out smoothly and under favorable conditions.
Furthermore, it exhibits high durability with little deterioration over time, and there is no risk of eccentricity occurring during use. In addition, since the main shaft is independent from the lid, that is, the end plate, it is easy to handle, and there is no problem of increasing distortion due to repeated attachment and detachment of the end plate, and the end plate itself can be easily attached and removed.

[Brief explanation of the drawing]

The drawings show an embodiment of the stirring device according to the present invention, in which Fig. 1 is a front view, Fig. 2 is a right side view, Fig. 3 is a partial vertical cross-sectional view, and Fig. 4 is a cross-section of the lower bearing part. FIG. 5 is a sectional view of the upper bearing portion. 3... Tank body, 5... Lower bearing, 6... Magnetic driven body, 7... Stirring main shaft, 8... Upper bearing, 10...
Thrust bearing, 11... Radial bearing, 2G... Bearing support, 31.32.33°... Vane, 40...
End plate, 51...magnetic drive body. Patent applicant Tamago Kikai Seisakusho Co., Ltd. Patent attorney Mukai Izawa □”. 1 (r-1 Figure 1) Figure 2 Figure 3

Claims (3)

[Claims] (1) A lower bearing is provided at the bottom of the tank body to support the stirring main shaft placed in the center of the tank body, and a magnetic driven body guided by a magnetic drive body placed outside the bottom of the tank body is attached to the stirring main shaft. , one or more blades are attached to the stirring main shaft, and an upper bearing for bearing the upper part of the stirring main shaft is fitted and fixed inside the tank body with a bearing support, and the stirring main shaft is fixed to A stirring tank device having a configuration in which a tank body is provided with an end plate that can be opened and closed independently of the water. (2) The stirring tank device according to claim 1, wherein the lower bearing comprises a thrust bearing for receiving the lower end of the stirring main shaft and a radial bearing. (3) The stirring tank device according to claim 1 or 2, wherein the thrust bearing comprises a ceramic chip fixed to a bearing holder on the tank body side and a ceramic protrusion fixed to the lower end of the stirring main shaft.