JPH0663129U - Stirrer - Google Patents

Abstract

(57) [Abstract] [Purpose] The structure of the stirring shaft is simplified by eliminating the need for a sealing mechanism for the stirring shaft, and the contamination of the stirring liquid and the failure of the bearing are prevented. A stirring shaft 9 is rotatably supported inside a container 1 containing a stirring liquid, and the stirring shaft 9 is linked to a drive shaft 16.
The opening of the container 1 is sealed with a bearing case inner 7, the one end of a stirring shaft 9 is rotatably supported on the inner surface of the case inner 7, and the inner magnet 12 is fixed to one end of the shaft 9. A bearing case outer 17 is provided at one end of the drive shaft 16, the case outer 17 is arranged outside the bearing case inner 7 with a space therebetween, and an outer magnet 18 is provided on the bearing case outer 17. These magnets 1
2, 18 are arranged close to the inside and outside of the bearing case inner 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stirring device which does not require a sealing mechanism for a stirring shaft, has a simple structure, and prevents contamination of stirring liquid and failure of a bearing.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, as a device for stirring a liquid contained in a container, there is a device in which a stirring shaft equipped with stirring blades is rotatably supported in the container. In this conventional type, the drive shaft and the agitation shaft are integrally formed, and this is supported vertically through the container cover in the container, and its bearing is arranged inside the container. In order to prevent liquid leakage, an appropriate shaft seal mechanism was installed on the shaft support.

However, in such a structure, the lubricating oil may flow out from the bearing arranged in the container, and the stirring liquid may be contaminated or deteriorated. In addition, when the stirring liquid is a strongly acidic or alkaline chemical. However, if these chemicals cause corrosion or malfunction of the bearing due to their adhesion, and if they are liquid chemicals that have a relatively high viscosity and solidify over time, they may adhere to the shaft seal part or bearing and penetrate, There was a fear that the function of would deteriorate rapidly and become unusable. On the other hand, the shaft seal mechanism is generally complicated and expensive, has a large number of parts, and has a problem of increasing the cost of this type of device.

[0004]

[Problems to be solved by the device]

 The present invention solves such a problem, and provides a stirring device that simplifies the structure by eliminating the need for a stirring mechanism for the stirring shaft, and prevents the contamination of the stirring liquid and the failure of the bearing. With the goal.

[0005]

For this reason, the stirring device of the present invention is a stirring device in which a stirring shaft is rotatably supported inside a container containing a stirring liquid, and the stirring shaft is linked to a drive shaft. The opening of the container is sealed with a bearing case inner, one end of the stirring shaft is rotatably supported on the inner surface of the case inner, the inner magnet is fixed to one end of the shaft, and the bearing case is attached to one end of the drive shaft. An outer is provided, the outer is spaced apart from the inner side of the bearing case, an outer magnet is provided on the outer side of the bearing case, and these magnets are placed close to the inner and outer positions of the inner side of the bearing case to form a stirring shaft. No need for a sealing mechanism, and the structure was simplified, and the contamination of the agitated liquid and the failure of the bearing were prevented, and moreover, the liquid leakage to the outside of the container was surely prevented. It is characterized by a door.

[0006]

[Action]

 A bearing that requires lubrication is placed outside the container to ensure good use and prevent the mixing of oil in the agitating liquid and the failure of the bearing due to chemicals. The seal mechanism for the stirring shaft is not required, the structure is simple, and it can be manufactured at low cost. The inner magnet and the outer magnet are magnetically connected, and the drive shaft and the stirring shaft, which are fixed to each other, are rotatably connected in a non-contact state, and the stirring shaft is rotated in synchronization with the drive shaft. The drive shaft and the agitation shaft are separately arranged inside and outside the bearing case inner, and the opening end of the container is sealed with the bearing case inner to reliably prevent liquid leakage to the outside of the container.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a stainless steel substantially cylindrical container capable of accommodating a plurality of stirring liquids, and a through hole 2 is provided at an end portion on an opening side thereof. The cover plate 3 has is fixed.

On the inner surface of the cover plate 3, three support rods 4 project vertically downward, and a support frame 5 projects radially inward at the lower ends thereof, and a corrosion-resistant bush is provided at the tip thereof. 6 is attached.

A bearing case inner 7 made of synthetic resin is fixed on the cover plate 3, and a shaft cylinder portion 7 a is provided at the center of the case 7 so as to project upward. A corrosion-resistant bush 8 is fixed to the center of the inner surface of the shaft cylinder portion 7a, and a stirring shaft 9 is rotatably supported between the bush 8 and the bush 6.

The stirring shaft 9 is vertically supported in the container 1, a stirring blade 10 is fixed to a lower end portion thereof, and a cylindrical magnet case 11 is fixed to an upper end portion thereof. The magnet case 11 is rotatably housed inside the shaft cylinder portion 7a, and is made of a non-magnetic member such as a stainless steel plate, and the cylindrical inner magnet 12 is housed therein.

In the embodiment, a so-called Pr magnet, which is a new rare earth magnet containing praseodymium Pr, iron Fe, boron B, and copper Cu as basic components, is used as the inner magnet 12. This Pr magnet has a lower oxygen content, better corrosion resistance, and better mechanical strength than conventional sintered R-Fe-B magnets, has very few cracks and chips, and can be machined. It has the advantage that no mold is required during manufacture.

The bearing case outer 14 is fixed on the bearing case inner 7 via a seal member 13, and a shaft cylinder portion 14 a is provided at the center of the case 14 so as to project upward. A bearing 15 is provided at the center of the upper portion of the shaft tube portion 14a, and the drive shaft 16 is rotatably supported by the bearing 15 via a flange 16a.

The drive shaft 16 is vertically supported by the bearing 15, the upper part of which is linked to the drive source, the lower end of which is positioned inside the shaft tube portion 14 a, and the drive ring 17 is integrally provided on the shaft end. ing. The drive ring 17 is arranged concentrically outside the shaft cylinder portion 7a, and is rotatably arranged between the shaft cylinder portions 7a and 14a, and a ring-shaped outer magnet 18 is attached to the inner surface thereof. .

The outer magnet 18 is made of the same material as the inner magnet 12, and its inner surface is arranged close to the outer peripheral surface of the shaft tube portion 7a. Although not shown in the embodiment, it is desirable to provide a guide hole in the upper half of the stirring shaft 9 and guide the stirring liquid to the bearing surface of the bush 8 through the guide hole for lubrication.

2 to 7 show another embodiment of the present invention, and the same reference numerals are used for the portions corresponding to the above-mentioned configuration. Of these, in the embodiment of FIG. 2, instead of supporting the stirring shaft 9 vertically, the main shafts 19 and 20 are rotatably supported by the bushes 8 and 6, and the rotating arms 21 and 22 are provided at the upper and lower ends thereof. One end is attached horizontally, the stirring shaft 9 is obliquely fixed between the other ends, and the stirring shaft 9 is caused to move in a hyperbolic rotary body around the axes of the main shafts 19 and 20. The feature is that the stirring precision is increased through the stirring blade 10. In the figure, reference numeral 23 is a retaining ring that locks the drive shaft 16 to the upper and lower ends of the bearing 15, and 24 and 25 are fixed frames of the container 1.

In the embodiment shown in FIG. 3, a cylindrical bearing case 26 is placed on the shaft tube portion 14a of the embodiment shown in FIG. 2, and this is fixed with a bolt 27, and a bearing 28 is provided at the center of the upper portion of the case 26. A stepped drive shaft 16 is rotatably supported by the bearing 28 and the bearing 15.

Then, a separately provided drive ring 17 is inserted into the lower end portion of the drive shaft 16, and these are fixed by a set screw 29. Reference numeral 30 denotes a through hole opened on the peripheral surface of the shaft cylinder portion 14a, which is used for attaching the set screw 29. That is, this embodiment is characterized in that the drive shaft 16 and the drive ring 17 are separately constructed so that they can be easily manufactured.

In the drawing, 31 is a bearing retainer, 32 is a spacer made of stainless steel arranged between the bearing case inner 7 and the bearing case outer 14 for strengthening the strength of the case 7 and at the peripheral end portion. The formed flange portion 32a is interposed between the two, so that vibrations and noises thereof can be absorbed. 33 and 34 are seal rings.

FIG. 4 shows a specific example of use of the embodiment of FIG. 3, and shows a suitable agitator mounting device 35 in the same figure. The agitator mounting device 35 has a base 36 that can be installed on the floor surface, and a bolt locking groove (not shown) is formed in the base 36.

A support frame 37 is erected on one end of the base 36, and a bridge frame 38 is horizontally installed on the upper end of the frame 37. A column 39 is erected at the tip of the bridging frame 38 so that the height position thereof can be adjusted, and a support arm 40 is horizontally provided above the column 39.

A spindle 41 is vertically movable at the end of the support arm 40, and a chuck 42 is attached to the lower end of the spindle 41. A rotary plate 43 is rotatably attached to the side surface of the support arm 40, and the plate 43 is linked to the vertical movement mechanism of the spindle 41, and an operation handle 44 is attached to the peripheral surface thereof. In the figure, 45 is a lock bolt for fixing the rotary plate 43.

A belt case 46 is openably and closably provided above the support arm 40, and a drive shaft 48 of a motor 47 and a shaft end of a spindle 41 are arranged in the case 46 so as to be separated from each other. The pulleys 49 and 50 are fixed, and the V belt 51 is wound around them, so that the rotation speed of the spindle 41 can be changed. On the other hand, a bottom plate 52 having a bolt insertion hole is provided at the bottom of the container 1 of the stirrer, and a nut can be screwed into the bolt inserted into the hole from the outside.

When the stirrer is installed in the stirrer mounting device 35, the container 1 is housed on the base 36, and the drive shaft 16 is positioned immediately below the chuck 42. Then, the bolt inserted into the bolt locking groove is inserted into the bolt insertion hole of the bottom plate 52, and the nut is screwed into the screw shaft to fix the container 1 on the base 36.

Next, the operation handle 44 is operated to push down the spindle 41, the upper end of the drive shaft 16 is housed inside the chuck 42 provided at the lower end thereof, and the drive shaft 16 is fixed by chucking this. . After fixing, the lock bolt 45 is screwed into the rotating plate 43 to fix the position of the spindle 41.

As described above, in the stirrer mounting device 35, the stirrer can be installed at a desired position, a variable speed drive source can be easily obtained, and the drive shaft 16 and the drive source can be easily disconnected. There is an advantage that can be done.

In the embodiment shown in FIG. 5, instead of arranging the outer magnet 18 at the outer annular position of the inner magnet 12, both magnets 12 and 18 are arranged at the upper and lower positions of the shaft cylinder portion 7a so as to face each other. The magnetic path cross-sectional area is increased to increase the magnetic flux to enhance their magnetic force, and at the same time, both magnets 12 and 18 are formed in a substantially disc shape, and the thickness thereof is reduced and the height of the shaft cylinder portions 7a and 14a is increased. It is characterized by making them flat by suppressing the above, and promoting the reduction in size and weight. In the figure, 53 is the guide hole for lubrication formed in the upper half of the stirring shaft 9. Although the stirring shaft 9 is arranged vertically in this embodiment, it may be arranged obliquely as described above.

In the embodiment shown in FIG. 6, the cover plate 3 is replaced by the bearing case inner 7 to reduce the number of parts, and the case inner portion 7 is made flat by eliminating the shaft cylinder portion 7a. The feature is that it is designed to further reduce the size and weight. Although the stirring shaft 9 is arranged vertically also in this embodiment, it may be arranged obliquely as described above.

In the embodiment shown in FIG. 7, the inner magnet 12 and the outer magnet 18 are arranged at the inner and outer positions in the above-described embodiment, and the drive ring 17 having one of the magnets 18 attached thereto is linked to the drive source. However, the inner magnet 12 fixed to the driven shaft can be moved in and out of the outer magnet 18 instead of forming a non-contact coupling or a torque limiter by these magnets 12 and 18. The feature is that the power is transmitted to the driven shaft when the vehicle approaches and can be applied to a non-contact magnet clutch.

In the stirrer configured as described above, the opening of the container 1 is tightly closed by the bearing case inner 7, and the drive shaft 16 and the stirring shaft 9 that follows the drive shaft 16 are separately arranged inside and outside the container 1. Therefore, the liquid leakage to the outside via the stirring shaft 9 can be surely prevented, and the complicated and expensive sealing mechanism as in the conventional case is not required, and the apparatus of this kind can be manufactured at a low cost.

Next, when a desired liquid is stirred using the above stirring device, a plurality of liquids to be stirred are stored in the container 1, and then the drive source is driven.

In this way, the drive shaft 16 linked to the drive source rotates, the drive ring 17 integral with this rotates, and the outer magnet 18 attached to the ring 17 moves together. The magnetic flux of the outer magnet 18 passes through the shaft cylinder portion 7a, attracts the inner magnet 12, and causes the magnet 12 to follow and rotate.

Therefore, the stirring shaft 9 to which the inner magnet 12 is fixed rotates, and the stirring blades 10 attached to this rotate together to stir the liquid. In this case, as shown in FIGS. 2 to 4, in which the stirring shaft 9 is obliquely arranged, the stirring shaft 9 moves in a hyperbolic rotary body, and the upper and lower parts thereof swing and rotate together, so that the stirring blade 10 and Since the surrounding liquid is stirred, the stirring accuracy is improved.

Further, the liquid surface fluctuates with stirring, and the droplets splash on the inner magnet 12 or the stirring liquid rises along the stirring shaft 9, but the upper portion of the container 1 is covered by the cover plate 7 and the barrel. Since it is hermetically sealed by the portion 7a, liquid leakage to the outside can be reliably prevented.

Moreover, since the bearing 15 requiring lubrication oil is disposed outside the container 1, the lubricating oil mixes with the agitating liquid to be contaminated or deteriorated, or the bearing 15 is agitated with the agitating liquid. There is no room for it, and there is no concern about corrosion or failure due to the adhesion of strong acids or alkaline liquids as in the past.

In this case, since the bushes 6 and 8 do not require lubrication and are composed of a corrosion resistant member, they do not deteriorate in function over time, and the inner magnet 12 has a magnet case excellent in corrosion resistance. Since it is housed in 11, there is no risk of it corroding. Since the lower end of the stirring shaft 9 is held by the support rod 4 via the support frame 5, its swing is suppressed.

[0036]

[Effect of device]

 As described above, the stirring device of the present invention rotatably supports one end of the stirring shaft on the inner surface of the bearing case inner side, fixes the inner magnet to the one end of the shaft, and attaches the bearing case outer to one end of the drive shaft. Since the outer case is provided separately from the inner side of the bearing case and the outer magnets are provided on the outer case of the bearing case, and these magnets are arranged close to the inner and outer positions of the inner case of the bearing case, the seal mechanism of the stirring shaft is It becomes unnecessary and the configuration can be simplified. Further, according to the present invention, since the bearing that requires lubrication oil is arranged outside the container, it is possible to prevent the contamination of the stirring liquid due to the mixing of the lubricating oil and the failure of the bearing due to the chemical liquid. Since the drive shaft and the stirring shaft are separately arranged and the opening of the container is sealed by the bearing case inner, it is possible to reliably prevent liquid leakage to the outside of the container.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a front view showing an installation example of the device of the present invention.

FIG. 5 is a sectional view showing still another embodiment of the present invention.

FIG. 6 is a sectional view showing still another embodiment of the present invention.

FIG. 7 is an explanatory view showing an example of a magnet clutch to which the basic structure of the present invention is applied.

[Explanation of symbols]

 1 Container 7 Bearing Case Inner 9 Stirring Shaft 12 Inner Magnet 16 Drive Shaft 17 Bearing Case Outer 18 Outer Magnet

Claims (1)

[Scope of utility model registration request] 1. A stirrer in which a stirring shaft is rotatably supported inside a container containing a stirring liquid, and the stirring shaft is linked to a drive shaft, the opening of the container is sealed with a bearing case inner, and the case inner One end of the stirring shaft is rotatably supported on the inner surface of the shaft, and an inner magnet is fixed to one end of the shaft, and a bearing case outer is provided at one end of the drive shaft, and the outer is separated from the outer side of the bearing case inner. An agitating device characterized in that the bearing case outer is provided with outer magnets, and these magnets are disposed close to the inner and outer positions of the bearing case inner.