JP4450648B2 - Stirrer - Google Patents

Description

  The present invention relates to a stirring device that transmits the rotational driving force of a motor of a driving unit to a stirring shaft portion in a non-contact state and stirs the contents in a sealed stirring tank, and in particular, the size of the motor is stirred. The present invention relates to an agitation device that is optimally sized according to a load and that can maintain a small size.

  Conventionally, this type of stirring device includes a magnet drive stirring device 900 shown in FIG. 11 (see, for example, Patent Document 1). This magnet drive agitator 900 is arranged in parallel with a drive unit 906 that generates a rotational driving force by a motor 907, and rotates a stirring blade (not shown) by the rotational driving force of the drive unit 906. An agitation shaft 902 and an agitation tank 903 in which an agitation blade for agitating the contents are hermetically stored are provided.

  Then, the rotational driving force of the driving unit 906 is transmitted from the driving unit 906 to the stirring shaft portion 902 in a non-contact state by the magnet power transmission unit 909, and the rotational driving force of the stirring shaft portion 902 is stirred in a non-contact state. The rotation shaft 942 is transmitted. The magnet power transmission unit 909 includes a ring-shaped drive magnet 981 of the drive unit 906 and a driven magnet 952 of the stirring shaft unit 902.

JP 2003-126670 A (see FIG. 1)

  Incidentally, in the conventional magnet drive stirring device 900 shown in FIG. 11, the size of the motor 907 is determined in accordance with the stirring load of the stirring blade. However, since the conventional magnet drive agitator 900 has the drive unit 906 and the agitation shaft portion 902 arranged in parallel, when the motor 907 is large, the diameter of the drive magnet 981 is also increased, and the drive magnet 981 The distance from the driven magnet 952 must be such that the rotational driving force can be transmitted by the magnetism of the magnet.

  For this reason, when the diameter of the motor 907 is increased, the conventional magnet drive agitator 900 has a problem that the drive unit 906 must be increased, and the entire apparatus becomes large.

  An object of the present invention is to provide an agitation device that can maintain the small size of the device even if the size of the motor of the drive unit is set to an optimum size according to the agitation load.

The present invention is a stirring shaft having the rotation axis (4) to (e.g., FIGS. 1-7 see), the inner partition wall (3a) (2),
Non-contact rotating means (41, 51 ) for interlocking the rotating shaft (4 ) in a non-contact manner from the outside of the inner partition;
An agitation tank (3 ), which is hermetically attached to the inner partition wall (3a ) and has an agitating blade for agitating the contents by the rotation of the rotating shaft (4 ) ;
A drive unit (6 ) for transmitting a rotational force to the non-contact rotation means (41, 51 ) ,
The drive unit (6 ) has a motor (7 ) and a drive magnet (81 ) interlocked with the output shaft (72 ) of the motor (7 ) ,
The stirring shaft portion (2 ) has a driven magnet (52 ) interlocked with the non-contact rotating means (41, 51 ) ,
It arranged the stirring shaft (2) and the drive unit (6) in mutually intersecting directions, the rotational surface (81 g, 52 g) of both magnets (81,52) made to face the same Judges.

The drive magnet (81) has a plurality of drive magnet pieces (81a to 81f) arranged in a substantially conical cylinder shape in the drive unit (6).
The driven magnet (52) has a plurality of driven magnet pieces (52a to 52f) arranged in a substantially cylindrical shape on the stirring shaft (2),
The mutually opposing parts of the rotation outer peripheral surfaces (81g, 52g) of the two magnets (81, 52) are parallel to each other .

Wherein the front SL drive magnet (81) driven magnets (52) is a permanent magnet.

  Note that the reference numerals in the parentheses are for comparison with the drawings, but are for the convenience of facilitating the understanding of the invention by facilitating correspondence with the embodiments. It will not affect anything.

  According to the first aspect of the present invention, since the stirring shaft portion and the drive portion are arranged in a direction crossing each other and the rotating surfaces of both magnets are opposed to each other, the size of the drive magnet is hardly changed. The contents in the agitation tank can be reliably agitated by keeping the overall size small and by optimizing the size of the motor in accordance with the agitation load of the agitation blade.

Furthermore , since the drive magnet has a plurality of drive magnet pieces arranged in a conical cylindrical shape at the other end of the drive unit, and the mutually opposed portions of the rotating outer peripheral surfaces of both magnets are parallel to each other, the stirring shaft portion Even if the drive unit and the drive unit are arranged obliquely crossing each other, it is possible to reliably transmit the rotational driving force from the drive unit to the stirring shaft unit, and to reliably rotate the stirring blade. .

According to the second aspect of the present invention, since the drive magnet and the driven magnet are permanent magnets, the apparatus can be simplified.

(Agitator of the first embodiment)
Hereinafter, a magnet drive stirring device as a stirring device according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view of a magnet drive agitator according to a first embodiment of the present invention.

  The magnet drive stirring device 1 includes a stirring shaft portion 2, a driving portion 6, a stirring tank 3, and a magnet power transmission portion 9. The stirring tank 3 contains a stirring blade for stirring the contents and a shaft 4 that is a rotating shaft integrated with the stirring blade in a sealed state in a container (not shown) that stores the contents to be stirred in the lower part of FIG. And isolated from the outside. The shaft 4 extends upward and is surrounded by a casing 3 a that is an elongated inner partition that is a part of the stirring tank 3.

  First, the structure of the drive part 6 is demonstrated based on FIG.1 and FIG.2. 2 is a cross-sectional view of the drive unit 6 shown in FIG. The drive unit 6 includes a motor 7 and a magnet coupling 8. The motor 7 includes a case 71, a rotating shaft 72, an armature (not shown) included in the case 71, and the like, and outputs a rotational driving force generated by exciting the armature to the rotating shaft 72. It has become. The magnet coupling 8 includes a drive magnet 81 including six magnet pieces 81a, 81b, 81c, 81d, 81e, and 81f, a case 82, and a connecting block 83. The connection block 83 is made of a non-magnetic material and is formed in a shape in which a circular shaft-like upper block 83a having a circular cross section and a lower block 83b having a substantially regular hexagonal pyramid shape are connected coaxially, and the motor is connected to the upper block 83a. 7 rotating shafts 72 are connected.

  On the side surface of the lower block 83b, as shown in FIG. 2, the drive magnet pieces 81a, 81b, 81c, 81d, 81e, 81f constituting the drive magnet 81 correspond to the side surfaces of the lower block 83b. Are arranged and fixed at approximately equal intervals in six places. Since the drive magnet 81 and the connecting block 83 are connected to the rotating shaft 72, the driving magnet 81 and the connecting block 83 are rotated together with the rotating shaft 72, and are included so as not to contact the nonmagnetic case 82. . On the other hand, the case 82 is fixed to the case 71 (fixed part of the drive unit 6) 71 of the motor 7. In the case 82, the portion that houses the drive magnet 81 is formed in a conical shape.

  The polarities (N pole, S pole) of the drive magnet pieces 81a, 81b,..., 81f are alternately reversed in the rotation direction of the connecting block 83. For example, when the inner peripheral side of the drive magnet piece 81b is an N pole and the outer peripheral side is an S pole, the inner peripheral side of adjacent drive magnet pieces 81a and 81c is an S pole and the outer peripheral side is an N pole. Has been.

  The entire drive unit 6 is supported by an arm (not shown), and is movable and fixed relative to a stirring shaft 2 described later by the arm. When the magnet drive stirring device 1 is driven, the driving unit 6 is fixed to the stirring shaft portion 2 with a predetermined gap GP so as not to contact the stirring shaft portion 2.

  Next, the configuration of the stirring shaft portion 2 will be described with reference to FIGS. 1 and 3. FIG. 3 is a cross-sectional view of the stirring shaft portion 2 shown in FIG. The stirring shaft portion 2 includes a holder 5, magnets 41 and 51, and the like.

  As shown in FIGS. 1 and 3, the holder 5 includes a sleeve 54, a driven magnet 52 including six driven magnet pieces 52a, 52b, 52c, 52d, 52e, and 52f, a sleeve 53, and two outer magnet pieces 51a and 51b. The outer magnet 51 and the bearings 55 and 56 are provided. As shown in FIG. 3, driven magnet pieces 52 a, 52 b,..., 52 f constituting the driven magnet 52 are arranged on the inner periphery of the holder 5 symmetrically about the rotation center of the holder 5 at substantially equal intervals. . The driven magnet piece is sandwiched between the inner periphery of a cylindrical sleeve 54 made of a non-magnetic material and coaxially disposed on the outer periphery of the sleeve 53, and is fixed in a substantially cylindrical shape.

  Furthermore, the polarities (N pole, S pole) of the driven magnet pieces 52 a, 52 b,..., 52 f are alternately reversed in the rotation direction of the holder 5. For example, if the inner peripheral side of the driven magnet piece 52b is the S pole and the outer peripheral side is the N pole, the inner peripheral side of the adjacent driven magnet pieces 52a and 52c is the N pole and the outer peripheral side is the S pole. Yes.

  The drive magnet 81 and the driven magnet 52 are arranged to face each other with a predetermined gap GP as shown in FIG. 1, and based on the magnetic attractive force between the drive magnet 81 and the driven magnet 52 described later, the drive unit 6. , That is, the rotational driving force of the motor 7 is transmitted to the stirring shaft portion 2 without contact. The drive magnet 81 and the driven magnet 52 are components of the magnet power transmission unit 9. On the inner periphery of the sleeve 54, as shown in FIG. 3, an outer magnet 51 composed of outer magnet pieces 51a and 51b is opposed to the inner magnet 41 across the casing 3a symmetrically about the center of the holder 5. It is arranged and is fixed on the inner peripheral surface of the sleeve 53. The driven magnet 52 is disposed on the outer periphery of the outer magnet 51 a via the sleeve 53. The outer magnet pieces 51a and 51b are arranged with their polarities alternately reversed in the rotation direction of the holder 5, that is, the polarities (N pole and S pole) on the inner peripheral surface side of the outer magnet pieces 51a and 51b are different. They are arranged to be poles.

  And the whole holder 5 is carry | supported by the step part 31 and 32 formed in the outer periphery of the casing 3a via the bearings 55 and 56 arrange | positioned in the inner peripheral surface of the holder 5 as shown in FIG. The bearings 55 and 56 are rotatably supported. Thus, the driven magnet 52 described above is rotatable integrally with the outer magnet 51.

  As shown in FIG. 1, a nonmagnetic cover 15 is mounted on the upper side of the casing 3 a so as to cover the outer peripheral surface of the casing 3 a from above the holder 5. Further, a rotation speed sensor 13 is disposed further above the cover 15, and is mounted on the tip of the agitation tank 3, that is, the upper part of the casing 3a.

  The rotation speed sensor 13 includes a support portion 13a and a detection portion 13b, and is mounted such that a substantially cylindrical support portion 13a is inserted from above the casing 3a and connected to the outer surface of the support portion 13a. The part 13b detects the rotational speed of the shaft 4 by the magnetism of a magnet (not shown) embedded in the shaft upper part 42 described later, and outputs the detection result to a processing device (not shown) provided outside. A cap 14 is screwed onto the casing 3a from above the rotational speed sensor 13, and the cover 15 and the rotational speed sensor 13 are fixed so as not to rotate.

  As described above, since the rotational speed sensor 13 is attached to the tip of the stirring tank 3 (upper part of the casing 3a), the rotational speed sensor 13 can be easily attached and detached, and the handling of the apparatus can be improved. it can.

  Further, since the cover 15 covers the outer periphery of the rotating holder 5 and the case 82 of the driving unit 6 also covers the outer periphery of the connecting block 83 and the driving magnet 81 as described above, the cover 15 is caught in the rotating unit. Is prevented, the reliability of the apparatus can be improved, and the safety of the apparatus can be improved.

  The agitation tank 3 has a cooler jacket 11 and an adapter 12 that circulates and cools water to the agitation shaft portion 2 that generates heat by the rotation of the holder 5, and is made of a non-magnetic material via the cooler jacket 11 and the adapter 12. A casing 3a made of, for example, stainless steel that can withstand a predetermined pressure is attached to a stirring vessel (not shown) and sealed. The shaft 4 is coaxially inserted into the casing 3a.

  The shaft 4 includes an inner magnet 41, a shaft upper portion 42, and a shaft lower portion 43. The shaft upper portion 42 is connected to the upper end of the inner magnet 41 and the shaft lower portion 43 is coaxially connected to the lower end. The shaft upper part 42 is rotatably supported inside the casing 3a, and the shaft lower part 43 is connected to a stirring blade (not shown) that rotates to stir the contents in the stirring tank 3. Further, the inner magnet 41 is arranged such that the magnetic poles (N pole, S pole) are oriented in the cross-sectional direction of FIG. The outer magnet 51 and the inner magnet 41 are arranged to face each other with the casing 3a interposed therebetween as shown in FIG.

  In the above configuration, the drive unit 6 is inclined with respect to the agitation shaft unit 2 by separating the one end 6 a provided with the motor 7 from the agitation shaft 2 than the other end 6 b provided with the drive magnet 81. It is arranged in the crossing direction. The rotational outer peripheral surface 81g of the drive magnet 81 is formed in a substantially conical shape according to the angle α formed by the drive unit 6 and the stirring shaft portion 2, and the rotational outer peripheral surface 81g of the drive magnet 81 and the driven magnet 52 facing each other. 52g is made parallel.

  Next, operation | movement of the magnet drive stirring apparatus 1 which concerns on this invention is demonstrated. When the armature of the motor 7 is excited and the rotating shaft 72 of the motor 7 is rotated, the drive magnet 81 is also rotated together with the connecting block 83. Based on the magnetic attraction force (described later) of the drive magnet 81 and the driven magnet 52, the rotational drive force of the motor 7 is transmitted to the holder 5, and the holder 5 rotates.

  When the holder 5 rotates, the outer magnet 51 rotates with this. The outer magnet 51 rotates the shaft 4 by a magnetic attractive force between the outer magnet 51 and the inner magnet 41 with the casing 3a interposed therebetween.

  Here, the rotational driving force transmission based on the magnetic attractive force between the outer magnet 51 and the inner magnet 41 will be described. First, the stationary state will be specifically described with reference to FIG. FIG. 4 is a partially omitted schematic diagram showing the outer magnet 51 and the inner magnet 41 in a stationary state.

  When the polarities of the opposed inner magnet 41 and the outer magnets 51a and 51b are different from each other as shown in FIG. 4, the magnetic lines of force (broken lines shown in FIG. 4) are the outer magnet piece 51a, the casing 3a, the inner magnet 41, and the casing. 3a, which occurs via the outer magnet piece 51b. At this time, the inner magnet 41 is attracted to the outer magnet pieces 51a and 51b substantially in the direction of the lines of magnetic force shown in FIG. 4, and a horizontal force shown in FIG. Since these forces are generated in the same magnitude and in opposite directions, they cancel each other, and the stationary state is maintained as long as there is no change in the relationship of the opposing arrangement.

  Next, the operation state will be specifically described with reference to FIG. FIG. 5 is a partially omitted schematic diagram showing the outer magnet 51 and the inner magnet 41 in the operating state.

  As shown in FIG. 5, when the holder 5 is rotated in the direction D shown in FIG. 5 from the above-described stationary state, the opposing arrangement of the inner magnet 41 and the outer magnet pieces 51a and 51b is shifted, so that the magnetic lines of force are the broken lines shown in FIG. It becomes a twisted shape. At this time, the N pole of the inner magnet 41 generates a force in the direction of the magnetic force lines indicated by the broken line in FIG. On the other hand, the N pole of the inner magnet 41 also generates a force in the direction of the magnetic field indicated by the broken line in FIG. The direction of these forces does not pass through the center of rotation of the inner magnet 41, that is, the inner magnet 41 generates a rotational torque in the direction E shown in FIG. 5, and the shaft 4 together with the inner magnet 41 has the same direction as the holder 5 (see FIG. 5). (E direction shown).

  That is, the holder 5 and the shaft 4 rotate the stirring blade by the magnetic attractive force based on the outer magnet 51 and the inner magnet 41 described above, outside and inside the stirring tank 3 without contacting the casing 3a. Therefore, the outer magnet 51 and the inner magnet 41 constitute non-contact rotating means.

  Next, when the excitation of the armature of the motor 7 is stopped, the rotation of the drive magnet 81 together with the connecting block 83 is stopped, and the drive magnet 81 and the driven magnet 52 are in a stationary state as will be described later, together with the inner magnet 41 and the outer magnet. The magnet 51 is also in the stationary state described above. Thereby, the rotation of the stirring blade is stopped and the stirring is stopped. The outer magnet pieces 51a and 51b have been shown in the example in which the polarities are alternately reversed in the rotation direction. However, the outer magnet pieces 51a and 51b may be integrated magnets having the same polarities as those described above.

  Furthermore, although the above-mentioned inner magnet 41 has shown an example in which a pair of magnet pieces are arranged, a plurality of pairs of magnet pieces may be arranged facing the outer periphery of the shaft 4. Further, it may be an integral magnet in which the same polarity as described above is arranged facing the outer periphery.

  The magnetic attraction force based on the non-contact magnet power transmission unit 9 including the drive magnet 81 and the driven magnet 52 will be described. First, the stationary state will be specifically described with reference to FIG. FIG. 6 is a partially omitted schematic diagram showing the drive magnet 81 and the driven magnet 52 in a stationary state.

  For example, as shown in FIG. 6, through the gap GP between the holder 5 and the magnet coupling 8, the S pole of the drive magnet piece 81b and the N pole of the driven magnet piece 52b, which are different from each other, face each other. In the case of the arrangement, the magnetic force lines (broken lines shown in the upper part of FIG. 6) passing through both magnet pieces 81a, 81b, 52b, 52a and the magnetic lines of force (broken lines shown in the lower part of FIG. 6) passing through both magnet pieces 81b, 81c, 52c, 52b. ) Occurs. At this time, the S pole of the drive magnet piece 81b and the N pole of the driven magnet piece 52b are attracted to each other in the approximate direction (horizontal direction in the figure) of the magnetic field lines (broken line shown in the center of FIG. 6) through the gap GP. Since the force generated in the driven magnet piece 52 b passes through the center of rotation of the holder 5, no rotational torque is generated in the holder 5.

  The driving magnet pieces 81a and 81c and the driven magnet pieces 52a and 52c generate a force that attracts them in the approximate direction of the lines of magnetic force (broken lines shown in the upper and lower directions in FIG. 6). The driven magnet pieces 52a and 52c Since the resultant force of these forces passes through the center of rotation of the holder 5 in the horizontal direction of FIG. 5, no rotational torque is generated in the holder 5. Therefore, the stationary state is maintained as long as there is no change in the above-described facing relationship.

  Next, the operation state will be specifically described with reference to FIG. FIG. 7 is a partially omitted schematic diagram showing the drive magnet 81 and the driven magnet 52 in the operating state.

  For example, as shown in FIG. 7, when the motor 7 rotates from the stationary state described above and the magnet coupling 8 rotates in the direction F shown in FIG. 7, the drive magnet pieces 81a, 81b, 81c and the driven magnet piece 52a. , 52b, and 52c deviate from the opposing arrangement in the stationary state, and the magnetic field lines are twisted as shown by the broken lines in FIG. At this time, since the N pole of the driven magnet piece 52b is different from the S pole of the drive magnet piece 81b, the N poles of the drive magnet piece 81c are attracted in the approximate direction of the magnetic field lines (broken line shown in the center of FIG. 7). Repel each other because they are of the same polarity. Thereby, the direction of the resultant force of the force generated in the driven magnet piece 52b is substantially upward in FIG.

  Next, the S pole of the driven magnet piece 52a attracts the N pole of the drive magnet piece 81a in the substantial direction of the magnetic force line (broken line shown in the upper part of FIG. 7), and repels the S pole of the drive magnet piece 81b. Thereby, the direction of the resultant force of the driven magnet piece 52a is substantially upward in FIG. Further, the S pole of the driven magnet piece 52c attracts the N pole of the drive magnet piece 81c substantially in the direction of the magnetic force line (broken line shown in the lower part of FIG. 7), and a force in the upper right direction in FIG. 7 is generated.

  Since these forces do not pass through the center of rotation of the holder 5 and cause the holder 5 to generate the rotational torque in the G direction shown in FIG. 7, when the connecting block 83 rotates in the F direction, the holder 5 Rotate in the G direction shown in FIG.

  Next, when the excitation of the motor 7 to the armature is stopped, the rotation of the drive magnet 81 together with the connecting block 83 is stopped, and the drive magnet 81 and the driven magnet 52 are in the stationary state as described above. Thereby, the power transmission of the motor 7 from the drive part 6 to the stirring shaft part 2 is stopped.

  As described above, in the magnet drive agitation device 1 according to the present invention, the one end 6 a provided with the motor 7 of the drive unit 6 is separated from the agitation shaft 2 than the other end 6 b provided with the drive magnet 81. The motor 7 is provided on one end side while maintaining the entire apparatus small without changing the size of the magnet power transmission unit 9 since it is arranged in a direction obliquely intersecting the stirring shaft 2. Thus, the content in the agitation tank 3 can be reliably agitated by adjusting the size of the agitator to an optimum size according to the agitation load of the agitation blade. That is, for example, when a larger motor than the motor 7 shown in FIG. 1 is required due to the difference in the type of liquid to be added to the stirring tank 3 and the stirring mode, a larger driving force is required, even if the motor diameter increases. The large motor 7 can be applied without interfering with the casing 3 a and the holder 5 while maintaining the downsizing of the stirring device 1.

  Further, the magnet drive stirring device 1 according to the present invention has a rotational outer peripheral surface 81g of the drive magnet 81 in a conical shape according to an angle α formed by the drive unit 6 and the stirring shaft portion 2, and the drive magnet 81 Since the rotating outer peripheral surfaces 81g and 52g facing each other with the driven magnet 52 are made parallel to each other, even if the drive unit 6 and the stirring shaft unit 2 are arranged in an obliquely intersecting direction, a predetermined plurality of The magnet pieces (the drive magnet 81 and the driven magnet 52) can be arranged to face each other, the rotational driving force of the driving unit 6 can be reliably transmitted to the stirring shaft portion 2, and the rotational driving force can be transmitted smoothly. Thereby, the fall of the rotational efficiency in the power transmission from the drive part 6 to the stirring shaft part 2 can be prevented.

  Furthermore, since the drive magnet 81 and the driven magnet 52 are magnetized with magnetic poles on the rotating outer peripheral surfaces 81g, 52g, the magnetic attraction force between the drive magnet 81 and the driven magnet 52 is effectively used to drive the drive magnet 6 from the drive unit 6. The rotational driving force can be reliably transmitted to the stirring shaft portion 2.

  In the above embodiment, the outer periphery of the drive magnet is conical, but the outer periphery of the driven magnet may be conical, or the outer periphery of both magnets may be conical. That is, in both magnets, the outer periphery of at least one magnet may be formed in a conical shape.

  Moreover, in the said embodiment, although the example of the rotational driving force transmission based on the magnetic attractive force of the drive magnet 81 and the driven magnet 52 and the magnetic attractive force of the outer magnet 51 and the inner magnet 41 was shown, it is not restricted to this. The drive unit 6 and the agitation shaft portion 2 are not in contact with each other, and any device may be used as long as it transmits the rotational driving force of the drive unit 6 to the agitation shaft portion 2, for example, the drive magnet 81 and the outer side. Even if the rotational driving force of the driving unit 6 is directly transmitted by the magnetic attractive force based on the magnet 51 without using the driven magnet 52, the present invention can be applied. Further, in some cases, the outer magnet 51 may be excluded, and the inner magnet 41 may be directly driven by the drive magnet 81. Further, the drive unit and the stirring shaft unit may be arranged in directions orthogonal to each other. The magnet drive stirring device of this form will be described in the following second embodiment.

(Agitator of the second embodiment)
A magnet drive stirring device 101 as a stirring device of the second embodiment will be described with reference to FIGS. FIG. 8 is a partial cross-sectional view of a magnet drive agitator according to a second embodiment of the present invention. Note that this embodiment deviates from the configuration described in the claims, and is precisely a reference example, but is referred to as an embodiment for convenience.

  The magnet drive stirring device 101 of the present embodiment also includes a stirring shaft portion 102, a driving portion 106, a stirring tank 103, and a magnet power transmission portion 109. In this magnet drive agitator 101, the drive unit 102 and the agitation shaft 102 are arranged in a substantially orthogonal state. The driven magnet 181 directly drives a driven magnet 152 that is a magnet corresponding to the inner magnet 41 in the first embodiment. The drive magnet 181 and the driven magnet 152 constitute a magnet power transmission unit 109.

  The stirring tank 103 stores a stirring blade that stirs the contents and a shaft 104 that is a rotating shaft integrated with the stirring blade in a sealed state in a container (not shown) that stores the contents to be stirred in the lower part of FIG. It is isolated from the outside. The shaft 104 extends upward and is surrounded by a casing 103 a that is an elongated inner partition wall that is a part of the stirring tank 103.

  First, the structure of the drive part 106 is demonstrated based on FIG.8 and FIG.9. 9 is a cross-sectional view of the drive unit 106 shown in FIG. The drive unit 106 has a motor 107. A magnet coupling 108 is fixed to the output shaft 172 of the motor 107 by a set screw 184. At the end of the magnet coupling 108, six round shaft-like drive magnet pieces 81a, 81b, 81c, 81d, 81e, 81f as drive magnets 181 are arranged in a circle at equal intervals. The case 182 covers the one end of the motor 107, the output shaft 172, the magnet coupling 108, and the drive magnet pieces 181a to 181f, and the motor 107 is provided. The magnet coupling 108, the drive magnet 181, and the case 182 are disposed coaxially with respect to the motor 107 output shaft 172.

  The polarities (N pole and S pole) of the drive magnet pieces 181 a to 181 f are alternately reversed in the rotation direction of the magnet coupling 108. For example, if the left end of the drive magnet piece 181b in FIG. 8 is the N pole and the right end is the S pole, the left end side of the adjacent drive magnet pieces 181a and 181c is the S pole and the right end side is the N pole. It is.

  Further, the entire drive unit 106 is formed by tightening a nut 185 screwed into the casing 103a by attaching a ring-shaped support unit 182a formed at the left end of the case 182 in FIG. 8 to the casing 103a of the stirring vessel 103. , And is integrally attached to the casing 103a. The shaft center CL1 of the drive unit 106 and the shaft center CL2 of the stirring shaft unit 102 are substantially perpendicular. The axis CL1 of the drive unit 106 is coincident with the rotation axis of the motor 107 output shaft 172. The axis CL2 of the stirring shaft portion 102 coincides with the rotation axis of the shaft 104.

  Next, the configuration of the stirring shaft 102 will be described with reference to FIGS. 10 is a cross-sectional view of the agitation shaft 102 shown in FIG. 8 taken along the line MM, and shows the driven magnet 152 and the drive magnet 181. FIG. The stirring shaft portion 102 includes a casing 103a, a shaft 104, and the like.

  As described above, the drive unit 106 is integrally provided in the casing 103a as the inner partition wall. A coupling 186 is screwed into the lower part of the casing 103a. The stirring tank 103 is screwed into the coupling 186. An O-ring 187 is attached to the coupling 186 in order to seal the inside of the casing 103a and the stirring vessel 103. The agitation tank 103 is provided with a water cooling jacket 188.

  The shaft 104 is rotatably supported in the casing 103a by a lower thrust bearing 189 and an upper bearing 190. The lower part of the shaft 104 is connected to a stirring blade (not shown) that rotates to stir the contents in the stirring tank 103. A set screw 191 is provided on the upper portion of the shaft 104.

  On the outer periphery of the large-diameter portion 192 of the shaft 104, six square-shaped driven magnet pieces 152a, 152b, 152c, 152d, 152e, and 152f as the driven magnet 152 are arranged in a cylindrical shape at equal intervals around the axis CL2. It is provided to be embedded.

  Further, the polarities (N pole, S pole) of the driven magnet pieces 152 a, 152 b,..., 152 f are alternately inverted in the rotation direction of the shaft 104. For example, if the inner peripheral side of the driven magnet piece 152b is the S pole and the outer peripheral side is the N pole, the inner peripheral side of the adjacent driven magnet pieces 152a and 152c is the N pole and the outer peripheral side is the S pole. is there.

  As shown in FIG. 10, the end surface 181 h of the drive magnet 181 and the rotating circumferential surface 152 g of the driven magnet 152 are arranged to face each other with a predetermined gap GP, and the magnetism between the drive magnet 181 and the driven magnet 152 is set. Based on the suction force, the rotational driving force of the motor 107 of the driving unit 106 is transmitted to the shaft 104 of the stirring shaft unit 102 without contact. The drive magnet 181 and the driven magnet 152 constitute non-contact rotating means.

Next, the operation of the Ma Gunetto drive stirrer 101. When the armature of the motor 107 is excited and the rotating shaft 172 of the motor 107 is rotated, the drive magnet 181 is also rotated together with the magnet coupling 108. Based on the magnetic action similar to that of the magnet drive agitator 1 of the first embodiment, the rotational driving force of the motor 107 is transmitted to the shaft 104 based on the magnetic attractive force of the driving magnet 181 and the driven magnet 152, and the shaft 104 rotates. To do. As a result, a stirring blade (not shown) rotates, and the agitated material in the stirring tank 103 is stirred.

  When excitation of the armature of the motor 107 is stopped, the rotation of the drive magnet 181 is stopped together with the magnet coupling 108, the drive magnet 181 and the driven magnet 152 are in a stationary state, and the shaft 104 is also in a stationary state. As a result, the rotation of the stirring blade is stopped and the stirring of the stirring object is stopped.

  In addition, although the drive magnet pieces 181a to 181f of the magnet drive stirring device 101 of the present embodiment are formed in a round shaft shape, they may be formed in a square shaft shape having a polygonal cross section. Further, the length may be shortened or may be a plate shape. In the case of a plate shape, it may be a disc shape or a square plate shape. When the drive magnet piece is plate-shaped, the plane facing the driven magnet 152 corresponds to the end face when the drive magnet piece is shaft-shaped. When the length of the drive magnet piece is shortened, the length of the drive unit can be shortened and the magnet drive stirring device can be downsized.

  The drive magnets 81 and 181 and the driven magnets 52 and 152 in the above embodiments are arranged such that the magnet pieces are alternately reversed in polarity in the rotation direction, but are integrated magnets having the same polarity as described above. Can also be applied to the present invention.

  Furthermore, although the drive magnets 81 and 181 and the driven magnets 52 and 152 in the above-described embodiment have been shown as examples of six magnet pieces, the present invention is not limited to this. For example, the drive magnet pieces and the driven magnet pieces are the same. The present invention can be applied even when the number is four, or a combination of different numbers, for example, the number of drive magnet pieces is eight and the number of driven magnet pieces is four.

  In the above configuration, the inner magnet 41, each of the magnet pieces 51a, 51b, 52a to 52f, 81a to 81f, 152a to 152f, and 181a to 181f are permanent magnets, so that the devices 1 and 101 can be simplified. Can do.

1 is a partially omitted cross-sectional view illustrating a stirring device according to a first embodiment of the present invention. It is AA arrow sectional drawing of FIG. 1 which shows a drive part. It is BB arrow sectional drawing of FIG. 1 which shows a stirring shaft part. It is a partially omitted schematic diagram showing an outer magnet and an inner magnet in a stationary state. It is a partially omitted schematic diagram showing an outer magnet and an inner magnet in an operating state. It is a partially omitted schematic diagram showing a drive magnet and a driven magnet in a stationary state. It is a partially omitted schematic diagram showing a drive magnet and a driven magnet in an operating state. It is a partially omitted sectional view showing a stirring device according to a second embodiment of the present invention. In FIG. 8, it is a KK arrow sectional drawing. It is MM arrow sectional drawing of the stirring shaft part shown in FIG. 8, and is the figure which showed the driven magnet and the drive magnet. It is a partially omitted sectional view showing a conventional magnet drive stirring device.

Explanation of symbols

CL1 Axis center of the drive section CL3 Axis center of the stirring shaft section 1 Magnet drive stirring device (stirring device)
2 Stirring shaft 3 Stirring tank 3a Casing (inner wall)
4 Shaft (Rotating shaft)
6 Driving part 7 Motor 9 Magnet power transmission part 41 Inner magnet (non-contact rotating means)
51 Outer magnet (non-contact rotating means)
51a, 51b Outer magnet piece 52 Driven magnet 52a thru 52f Driven magnet piece 52g Rotating outer peripheral surface (rotating surface)
81 Drive magnet 81a thru | or 81f Drive magnet piece 81g Rotation outer peripheral surface (rotation surface)
101 Magnetic drive stirring device (stirring device)
102 Stirring shaft 103 Stirring tank 103a Casing (inner partition)
104 Shaft (Rotating shaft)
106 Drive unit 109 Magnet power transmission unit 152 Driven magnet (non-contact rotation means)
152a to 152f Follower magnet piece 152g Rotating outer peripheral surface (rotating surface)
181 Drive magnet (non-contact rotating means)
181a to 181f Driving magnet piece 181h End surface (rotating surface)

Claims (2)

A stirring shaft having an axis of rotation within the inner partition wall,
Non-contact rotation means that interlocks the rotation shaft from the outside of the inner partition wall in a non-contact manner;
An agitation tank that is attached in a sealed manner in the inner partition and has an agitating blade for agitating the contents by rotation of the rotating shaft;
In a stirring device comprising: a drive unit that transmits a rotational force to the non-contact rotating means;
The drive unit has a motor and a drive magnet linked to the output shaft of the motor,
The stirring shaft portion has a driven magnet linked to the non-contact rotating means,
The stirring shaft and the said drive unit disposed in mutually intersecting directions, Ri Na to oppose the rotation faces of the two magnets,
The drive magnet has a plurality of drive magnet pieces arranged in a substantially conical cylinder shape in the drive unit,
The driven magnet has a plurality of driven magnet pieces arranged in a substantially cylindrical shape on the stirring shaft portion;
The mutually opposing portions of the rotating outer peripheral surfaces of the two magnets are parallel to each other.
A stirrer characterized by that. The drive magnet and the driven magnet are permanent magnets.
The stirrer according to claim 1 .

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