JP4086137B2 - Biaxial stirring device - Google Patents

Description

[0001]
[Industrial application fields]
  The present invention relates to a stirrer that stirs a fluid having a relatively high viscosity, and the stirrer that stirs a viscous fluid in a stirrer tank on a vertically installed cylinder with two stirrer blades. Able to mix and mix evenly and evenly, and to mix multiple highly viscous fluids in a short time with high accuracy and evenness while rotating the stirring blade relatively slowly It is.
[0002]
[Prior art]
  There are various types of stirring devices that are not limited to highly viscous fluids, and a variety of fluids are placed in a vertical cylindrical stirring tank and stirred by a vertical stirring blade. One of them is a uniaxial stirring blade, and an example thereof is described in JP-A-8-71398. The shape structure of the stirring blade in such a stirring device is various, such as a spiral thin plate, a flat vertical plate, and the like described in the above publication, The plate-like stirring blades that have both directional stirring functions are provided in multiple stages with the phases shifted sequentially in the rotational direction, thereby improving the stirring efficiency in the vertical direction and improving the stirring performance of highly viscous fluids. It is a thing.
  Moreover, as what was equipped with the biaxial stirring blade, there exists what is described in Unexamined-Japanese-Patent No. 2002-113344, for example, this thing is revolving while rotating the large and small helical stirring blade, The stirring efficiency is increased.
[0003]
  For both the one-shaft stirring blade and the two-shaft stirring blade, the individual stirring blades rotate independently in the stirring tank or rotate or revolve to rotate in the rotation direction, or in the rotation direction and longitudinal direction. To be stirred.
  The stirring blade in the stirring device has a surface that rotates with respect to the fluid in the stirring tank, and a shearing force acts on the fluid in contact with the blade surface. Is called “highly viscous fluid”), because of its stickiness, it does not peel off from the surface of the stirring blade, and is dragged. This drag force is spread over a wide range, and the surrounding fluid is rotated (co-rotation). Will be). Some layers remain attached to the surface of the stirring blade. For this reason, the stirring / mixing efficiency as a whole is extremely poor, and there is a portion that is hardly stirred / mixed. As a result, the stirring / mixing accuracy is poor, and even if the stirring time is prolonged, the stirring / mixing is performed uniformly. May not be possible.
[0004]
[Problems to be solved]
  In view of this, the present invention reliably prevents the stirring of the fluid to be stirred in the high-viscosity fluid stirring device using the biaxial stirring blade, and ensures that a portion that adheres to the surface of the stirring blade and is not stirred is generated. The problem 1 is to devise the shape of the pair of stirring blades so that they can be prevented.
[0005]
  Furthermore, a pair of stirring blades forces the fluid in the stirring tank to flow along a fixed path in the swirling direction and the longitudinal direction so that the fluid in the stirring tank is given a uniform stirring action. The problem 2 is to devise the shape of the stirring blade.
[0006]
  Furthermore, the problem 3 is to devise the drive mechanism so that the pair of stirring blades uniformly agitate the fluid in the stirring tank.
[0007]
[Means to solve the problem]
[Solution 1]

  Means taken to solve the above problem 1 (Solution means 1) is a stirrer that stirs and mixes a highly viscous fluid in the stirring tank by rotating a pair of vertical axis stirring blades in a vertically placed stirring tank. On the premise of (i) to (d) below.
(B) The horizontal cross section of the stirring blade is substantially elliptical with the vertical axis as the center,
(B) The sum of 1/2 of the major axis length and 1/2 of the minor axis length of the elliptical shape is equal to the interaxial distance;
(C) The rotational phase of one stirring blade and the other stirring blade is shifted by 90 degrees,Same angleRotating in the same direction at speed,
(D) The shape of the side curved surface of the stirring blade is such that the tip of one stirring blade is substantially in contact with the side surface of the other stirring blade at all rotational positions.
  The above “substantially elliptical shape” means not a so-called elliptical shape but a shape similar to an ellipse having a major axis and a minor axis.
  In addition, the “highly viscous fluid” means a fluid having a degree of viscosity that adheres to the stirring blade and forms a fluid layer that adheres to the surface of the stirring blade.
[0008]
[Action]
  Since the pair of stirring blades rotate in the same direction with one tip portion substantially in contact with the other side surface, the flow (co-rotation) that rotates with the rotation of one stirring blade is caused by the other stirring blade. Since it is interrupted, it moves to the influence area of the rotational force of the other stirring blade, and then moves again to the influence area of the rotational force of one stirring blade. Therefore, a swirl flow around the stirring blade does not occur due to the rotation of one stirring blade. The fluid to be stirred is stirred in the stirring tank while repeating the movement (flow) as described above.
[0009]
  Further, since the tips of the other stirring blade are substantially in contact with the side surface of one stirring blade and rotate in opposite directions, the layer adhering to the side surface of one stirring blade is scraped by the other stirring blade. It is dropped and pushed to the stirring area by the other stirring blade. And scraping off with respect to each of the both side surfaces of said one stirring blade is repeated at a rate of once per rotation. Therefore, the fluid once adhering to the side surface of the stirring blade is also reliably stirred immediately after that.
  Furthermore, 1/2 of the major axis length and the minor axis of the cross-sectional shape of the stirring bladelengthTherefore, the central portion of the stirring tank is also in the stirring region due to the rotation of the stirring blade.
[0010]
[Solution 2]

  In order to solve the above-mentioned problem 3, the solving means 2 revolves a pair of stirring blades together with the rotation of the stirring device of the solving means 1, and the rotation / revolution drive mechanism is changed by the following (a) to (c). It is composed.
(A) The vertical axes of both agitating blades equipped with a pair of identical planetary gears are rotatably supported by the carrier of the planetary gear transmission mechanism,
(B) driving both vertical axes with the planetary gears;
(C) The carrier is rotatably supported by the support member, and the center of rotation of the carrier is made to coincide with the center of the stirring tank positioned and fixed.
[0011]
[Action]
  Since the pair of stirring blades revolves while rotating in the stirring tank, the stirring action is evenly applied to the entire fluid in the stirring tank, and the viscous fluid is compared to the case where the individual stirring blades rotate in place. Is less likely to be accompanied, the stirring speed is further improved.
  Also, since the center of rotation of the carrier of the planetary gear transmission mechanism coincides with the center of the stirring tank, the two stirring blades rotate in pairs in the same direction and at the same angular speed, and revolve along a concentric circle with respect to the stirring tank. To do. Therefore, the stirring action by the pair of stirring blades is evenly applied to the fluid in the stirring tank, and the fluid in the stirring tank is evenly stirred..
[0012]
[Embodiment 1
  Embodiment 1Is the aboveSolution 2In the stirring blade, the major axis length of the elliptical shape is longer than ½ of the distance between the axes, and is substantially equal to the length inscribed in the vertical stirring tank on the line connecting the axes.
[0013]
[Action]
  Since the stirring blade revolves and repeatedly contacts the inner surface of the stirring tank by its rotation, the adhered fluid is also scraped off at the tip of the stirring blade and returned to the stirring area by the stirring blade. The fluid once adhered to the inner surface of the stirring tank is also reliably stirred.
  Therefore, all the parts of the stirring tank become a stirring region by the rotation and revolution of the stirring blade and are stirred uniformly.
[0014]
Embodiment 2

  Embodiment 2 is that the side surface of the stirring blade in the solution 2 is a straight surface in the vertical direction.
[0015]
[Action]
  Since the side surface of the stirring blade is a straight surface in the vertical direction, the viscous fluid is pushed forward in the rotational direction by the rotation of the stirring blade and stirred while being pushed radially outward along the blade surface. At this time, the tip of one stirring blade slides in the rotational direction in a state in which the tip of the other stirring blade is in substantially line contact with the side surface of the other stirring blade along the vertical straight line. The viscous fluid adhering to the side surface is scraped forward in the rotational direction.
  Since the side surface of the stirring blade is a straight surface in the vertical direction, the shape thereof is relatively simple, and therefore, it is relatively easy to manufacture.
[0016]
Embodiment 3

  Embodiment 3 is that the side surface of the stirring blade in the solution 2 is a spiral surface.
[0017]
[Action]
  Since the side surface of the stirring blade is a spiral surface, the stirring blade functions as a screw, and the viscous fluid is not only stirred by the rotation of the stirring blade, but also radially outward along the blade surface and obliquely downward The mixture is stirred while being pushed out (obliquely depending on the rotation direction). As described above, the viscous fluid is vigorously stirred in the vertical direction while being stirred, so that a complicated flow is generated in the stirring tank, thereby promoting stirring.
  The tip of one stirring blade has a spiral shape, and slides in the spiral direction in a state of substantially line contact with the spiral side surface of the other stirring blade along the longitudinal spiral. The viscous fluid adhering to the side surface of the other stirring blade is scraped out forward in the rotational direction and obliquely downward.
[0018]
  Although the spiral pitch of the spiral shape is arbitrary, the action of pushing the fluid downward increases as the spiral pitch decreases, and the resistance also increases. On the other hand, the lower the spiral pitch, the lower the extrusion speed. Since the relationship between the pitch and the stirring performance of the stirring blade depends on physical properties such as the rotational speed of the stirring blade and the viscosity of the fluid to be stirred, the optimum pitch cannot be determined unconditionally. Therefore, there is no choice but to individually select the optimum helical pitch according to the required degree of stirring, stirring time and the like.
[0019]
  (Delete)
[0020]
  (Delete)
[0021]
Embodiment 4

  In the fourth embodiment, the planetary gear transmission mechanism of the above solution 2 is such that the carrier is free and the ring gear or the sun gear is the drive gear.
[0022]
Embodiment 5

  Embodiment 5 is that the planetary gear transmission mechanism of the above solution 2 uses the carrier as the driving member and the ring gear or the sun gear as the fixed gear.
[0023]
Embodiment 6

  In Embodiment 6, the positioning mechanism of the stirring tank with respect to the stirring blade in the above solution 2 is provided with a non-circular recess on the upper surface of the support base, and the lower end of the stirring tank of the same shape is fitted into the non-circular recess. It is that it is detachably fixed to the support base.
[0024]
[Action]
  By fixing the support device of the planetary gear transmission and the support base in a state where the rotation center of the planetary gear transmission and the center of the non-circular recess portion of the upper surface of the support base are aligned, the non-circular recess of the upper surface of the support base is fixed. Since the center and the rotation center of the planetary gear transmission coincide with each other, the rotation center of the planetary gear transmission and the stirring tank It always coincides with the center.
  Therefore, the assembly of the stirring tank at the time of maintenance can be simplified and facilitated.
[0025]
Embodiment 7

  In the seventh embodiment, the planetary gear transmission mechanism supporting device in the solving means 2 is supported by the guide struts so that it can be raised and lowered, and is driven up and down by a feed screw mechanism.
[0026]
[Action]
  By raising the support with the feed screw mechanism, the stirring blade can be pulled up together with the planetary gear transmission mechanism and taken out from the stirring tank, and by lowering, the stirring blade is pushed down together with the planetary gear transmission mechanism. It can be inserted into the stirring tank from above. Since the positional relationship between the stirring blade and the stirring tank is maintained by the guide column even during the operation of detaching the stirring blade from the stirring tank, it is not necessary to adjust the positions of the stirring blade and the stirring tank at the time of remounting.
[0027]
[Solution 3]
(Claim 1Corresponding to)
  Another means (solution 3) taken to solve the above problem 3 is to stir and mix the highly viscous fluid in the stirring tank by rotating a pair of vertical axis stirring blades in a vertically placed stirring tank. On the premise of the stirring device, it is constituted by the following (a) to (f).
(B) The horizontal cross section of the stirring blade is substantially elliptical with the vertical axis as the center,
(B) The sum of 1/2 of the major axis length and 1/2 of the minor axis length of the elliptical shape is equal to the interaxial distance;
(C) The rotational phase of one stirring blade and the other stirring blade are 90 degrees out of phase and rotate in the same direction at the same angular velocity;
(D) The side curved surface shape of the stirring blade is such that the tip of one stirring blade is substantially in contact with the side surface portion of the other stirring blade at all rotational positions;
(E) rotating the pair of stirring blades with a drive mechanism;
(F) The drive mechanism rotatably supports the drive gear on the support member, and also supports the longitudinal axis and the intermediate shaft of the pair of agitating blades rotatably, and the pair of longitudinal axes and the intermediate shaft are supported by the drive gear. A rotating table with gears is provided on the support base, a stirring tank is detachably mounted on the rotating table, and the gears of the rotating table are driven by the pinion at the lower end of the intermediate shaft.
[0028]
[Action]
  Pair of stirringWing lengthThe shaft is rotated in the same direction by the drive gear.Same angleDriven at speed. On the other hand, the rotary table is driven by the drive gear via the intermediate shaft.the aboveStirringWing lengthDriven in the opposite direction to the axis. Therefore, the stirring tank is driven in the direction opposite to the stirring blade.
  Since the viscous fluid in the stirring tank rotates in the opposite direction to the stirring blade, the stirring effect of the stirring blade is evenly applied to the viscous fluid in the stirring tank, and the stirring effect and stirring speed are remarkably improved. To do.
  In addition, by making the side surface of the stirring blade a spiral surface, the stirring blade functions as a screw, and not only the viscous fluid is stirred by the rotation of the stirring blade, but also radially outward along the blade surface, And it is stirred while being pushed obliquely downward (or obliquely upward depending on the rotation direction). In this way, since the viscous fluid is vigorously stirred in the vertical direction while being stirred, a complicated flow is generated in the stirring tank, thereby promoting stirring..
The tip of one stirring blade has a spiral shape, and slides in the spiral direction in a state of substantially line contact with the spiral side surface of the other stirring blade along the longitudinal spiral. The viscous fluid adhering to the side surface of the other stirring blade will be scraped out forward and obliquely downward in the rotational direction..
[0029]
Embodiment 1
(Claim 3Corresponding to)
  Embodiment 1 is that the continuously variable transmission is interposed on the intermediate shaft in the drive mechanism of the solving means 3.
[0030]
[Action]
  Since the rotary table is driven by the drive gear via an intermediate shaft continuously variable transmission, the rotational speed of the rotary table is adjusted steplessly.
  Solution 3The stirring action of the stirrer is controlled by the rotation speed of the stirrer blades and the rotation speed of the stirring tank. Therefore, by adjusting the rotation speed of the rotary table with a continuously variable transmission, Depending on the elapsed time of stirring, the stirring action can be adjusted as appropriate.
  Further, if the continuously variable transmission is a transmission that can reversely rotate, the rotation direction of the rotary table can be reversed and the rotation speed thereof can be adjusted. Can be adjusted.
[0031]
Embodiment
[Example 1]
  Two distances L from the planetary gear transmissionVertical axis2 and 2 are suspended, and this pairVertical axisA stirring blade 1 is attached to each of 2 and 2. The side surfaces of the stirring blades 1 and 1 are straight surfaces in the vertical direction and are directed in directions perpendicular to each other.Vertical axis2 and 2 rotate at the same speed in the same direction.
  The major axis 1a of the stirring blade 1 in this example is 71 mm, and the minor axis 1b is 35 mm. The curved shape of the side surface of the stirring blade can be selected as appropriate, but when both the stirring blades 1 and 1 are rotated, the long diameter end of one stirring blade is substantially in contact with the side surface of the other stirring blade. There is something.
[0032]
  That is, one of the shape of the stirring blade 1 and the planar shape of the two stirring blades 1,1.An example isAs shown in FIG. 14 (a), when the two stirring blades in this are in a right angle relationship, the distance between the rotation axes of the two stirring blades is L, and the radius of curvature of the stirring blade side curved surface is R. , Where α is the radius of the arc of the major end of the stirring blade, L = R + α, R = L−α, α = LR, and the distance between the center of curvature radius R of the stirring blade side curved surface and the center of the stirring blade rotating shaft Can be calculated by C = √2 (L / 2−α). Further, if the inner diameter of the stirring tank at this time is D, D = 2 (C + α) + L, and the center thereof is the midpoint between the two rotating shafts.
  FIG. 14B shows an example in which the inter-axis distance L is 50 and the long-end end arc radius α is 3. R = 50−3 = 47, C = √2 (50 / 2−3) = 31.113, D = 2 (31.113 + 3) + 50 = 118.226.
  FIG. 14 (c) shows a planar shape when the long-diameter end portion is edge-shaped when the inter-axis distance L is 50 and the long-diameter end arc radius α is 0. In this case, R = 50-0 = 50, C = √2 (50 / 2-0) = 35.355, D = 2 (35.355 + 0) + 50 = 1200.71.
[0033]
  The viscous fluid in the agitation tank 3 is agitated by the pair of agitation blades 1, 1.Tank 3Has an inner diameter A of 124 mm and a depth of 55 mm.
  The pair of stirring blades relatively rotate in the same direction as shown in FIGS. 3 (a), 3 (b), and 3 (c). At this time, the tip end portion of one stirring blade 1 substantially contacts the side surface of the other stirring blade 1 in a straight line in the vertical direction, and slides so as to rub the side surface in the contacted state. Therefore, the flow of the viscous fluid that rotates in the direction of the arrow in FIG. 3 together with the one stirring blade is interrupted by the other stirring blade and is pushed back in the opposite direction to the flow. Moreover, the viscous fluid adhering to the side part of the other stirring blade is scraped off at the tip of one stirring blade. Then, as can be seen from the changes in FIGS. 3A, 3B, and 3C, the side to be scraped out of the two stirring blades and the side to be scraped off are sequentially changed by rotation, and one stirring blade Since the side surfaces to be scraped are alternately changed by the rotation of the stirring blades, the viscous fluid adhering to both side surfaces of the two stirring blades is intermittently scraped off.
  In this example, the long-diameter end of the stirring blade 1 slides intermittently on the inner surface of the stirring tank 3 and the stirring blades 1 and 1 revolve in the stirring tank, so that the viscous fluid adhering to the inner surface of the stirring tank is also stirred. It is scraped off intermittently by the tip of the wing.
[0034]
  Add 100 cc of lithographic printing ink (cyan) (viscosity 100 Pa · s) and 50 cc (yellow viscosity) of lithographic printing ink (viscosity 80 Pa · s) to stirring tank 3 and stir at a temperature of 25 ° C. When stirring at a blade rotation speed of 76 times / minute and a revolution speed of 20 times / minute, the stirring time is reduced to about 1/10 as compared with the case of using a conventional stirring device (same conditions).
  Further, in the prior art, uneven stirring is inevitable, but in this example, uneven stirring is completely eliminated.
[0035]
  Next, about the stirring blade drive device by the planetary gear transmission of this embodiment, the lifting mechanism of the stirring device, etc.Referring to FIGS. 4 to 6explain.
  The stirring blade driving device includes a ring gear 4 fixed to a support plate 14 and a planetary gear.5 , 5Carrier9Is an electric motor18Type planetary gear driven byTransmissionDevice.
  The support plate 14 is guided by two guide columns 21 and 21 so as to be movable up and down. There is a vertical screw shaft 23 between the guide struts 21, 21, the lower end of which is rotatably supported by the support base 20 by a bearing, and the upper portion is rotatably supported by the bearing between the guide struts 21, 21 by a bearing. Has been. A screw sleeve 22 is screwed onto the screw shaft 23, and the screw sleeve 22 is fixed to the support plate 14.
  A ring gear 4 is fixed to the lower surface of the support plate 14 with screws 14a.RearThe upper end of 9 is supported via a bearing 10.
  CatRear9 is rotatably held by the ring gear 4 via a bearing 10.Rear9, two vertical axes 2 and 2 are rotatably supported via bearings 8 and 8.
  CatRearThe drive shaft 15 is inserted and fixed in the center hole 9, and its upper end is detachably connected to the shaft of the electric motor 18 via the coupling 17.
[0036]
  Planetary gears 5 and 5 are respectively fixed to the upper ends of the vertical axes 2 and 2, and the planetary gears 5 and 5 mesh with the ring gear 4. The vertical axes 2 and 2Rear9 extends downward from the lower end, and the lower end thereof is fitted in the central hole of the stirring blades 1, 1. In this example, a stirring blade holder 7 is fixed to the upper end surface of the stirring blade 1, and this stirring blade holder 7 is detachably fixed to the vertical axes 2 and 2 by pins.
  As described above, the vertical axes 2 and 2 are supported through the bearings 8 and 8.Rear9 and theRear9 is held by the ring gear 4 via the bearing 10, and the ring gear 4 is fixed to the support plate 14 by a screw 14a. Therefore, when the support plate 14 is moved up and down by rotating the screw shaft 23 with the handle 24, the drive is performed with this. The apparatus moves up and down, and the stirring blade moves up and down. When the stirring blade is raised, the stirring blade 1 escapes upward from the stirring tank 3, and when the stirring blade 1 is lowered, the stirring blade 1 is inserted into the stirring tank 3.
[0037]
  The stirring tank 3 is a cylindrical body, and has a flange 3a at a lower end thereof, and a pair of flat portions 3b that are opposed to the flange 3a. On the other hand, the flange 3a of the agitation tank 3 is densely placed on the upper surface of the support base 20.FitThere is a concave part that fits in, and the flange is in this concave partFitTherefore, the stirring tank 3 is held on the support base 20 so as not to rotate.
[0038]
  The drive shaft 15 is driven by the shaft of the electric motor through the coupling 17, whereby the carrier 9 is driven, and the vertical axes 2 and 2 are driven to rotate by the rotation of the carrier 9. Since the planetary gear fixed to the upper ends of the vertical axes 2 and 2 meshes with the ring gear 4, the vertical axes 2 and 2 revolve while rotating.
  Since the two planetary gears are the same and mesh with the same ring gear 4, the rotational speeds of both longitudinal axes 2 and 2 are equal and revolve on the same track.
[0039]
[Example 2]
  Then, StirAgitatorExample 2about,With reference to FIGS.explain.
  Example 2 is a stirring blade31There is no particular difference from the first embodiment except that the side surface is a spiral surface. Stirring blade of this thing31The upper end surface of is located at a position shifted in the rotation direction by 90 degrees with respect to the lower end surface, and the side surface and the edge between them are spiral.
  The planar shape and the side surface shape of this are as shown in FIGS. 9A and 9B, and the cross sections AA, BB, CC, DD, and EE in FIG. As shown in FIGS. 10A to 10E, these cross-sectional shapes are all the same.
  In this example, the outline of the elliptical shape of the end face of the stirring blade 31 (not a strict ellipse, but a shape almost similar to an ellipse) is an imaginary circle having a major axis of 71 mm, a minor axis of 35 mm, and a radius of 4.77 mm at both ends of the major axis. This is a shape drawn by x and a common inscribed arc z with respect to a virtual circle y having a center radius of 17.5 mm and a partial arc of the virtual circle x. The height of the stirring blade 31 is 50 mm. The whole image is as shown in FIG.
[0040]
  The two agitating blades 31 and 31 are arranged so as to be combined with each other in the same manner as in the case where two screws (screw rods) are engaged with each other, and rotate in the same direction at the same speed as in the first embodiment. At this time, the fluid is stirred while being pushed radially outward and obliquely downward (or obliquely upward) by the spiral side surface of the stirring blade 31. Then, the spiral blade of the other stirring blade moves in the opposite direction while sliding with each other in a state where the spiral major-diameter end of one stirring blade is substantially in contact with the spiral side surface of the other stirring blade. The viscous fluid adhering to the side surface is scraped off at the end portion in the major axis direction of the one stirring blade.
  The viscous fluid in the stirring tank 3 is strongly pushed out by the stirring blade 31 in the direction having the velocity component in the swirl direction and the speed component in the longitudinal direction, and a complicated flow is generated between the stirring tank 3 and the stirring blades 31 and 31. Is produced, so the stirring effect is extremely high. Therefore, the so-called Weisenberg effect that occurs when substances with greatly different viscosities are mixed. On the other hand, it gets excited and wraps around the stickSea urchinPhenomenon), and even when substances having greatly different viscosities are mixed, stirring and mixing are performed very efficiently.
[0041]
  The stirring blades 31 of the stirring device shown in FIG. 7 and FIG. 8 are driven by a driving device using the planetary gear transmission mechanism shown in FIGS. Of course, this viscous fluid can be stirred. However, since the two stirring blades 31 and 31 having a spiral shape have a strong stirring action, the stirring effect is sufficiently exhibited only by the rotation. Therefore, the viscous fluid can be sufficiently stirred in a short time only by the rotation of the stirring blades 31 and 31.
  FIG. 12 shows an agitation drive device that only uses the rotation of the agitation blades 31 and 31. In this device, a drive gear 43 is rotatably supported on a support plate 42 that is supported by guide pillars 41 and 41 so as to be movable up and down, and the vertical axis of the stirring blades 31 and 31 is rotatably supported. . A pinion 44 is fixed to each of the vertical axes, and the pinion meshes with the drive gear 43.
  When the drive shaft 45 of the drive gear 43 is driven by an electric motor, the pinion 44 is driven at the same speed in the same direction, so that the stirring blades 31, 31 are driven at the same speed in the same direction.
[0042]
  An example of another driving device will be described with reference to FIG. This drive device drives the stirring blades 31 together with the stirring blades, while the example of FIG. 12 drives the stirring blades 31, 31. An intermediate shaft 51 is rotatably supported on the support plate 42 on the side opposite to the pinion 44, and a pinion 52 fixed to the upper end of the intermediate shaft is engaged with the drive gear 43. On the other hand, a rotary table 61 is rotatably supported by a support base 60, and the stirring tank 3 is detachably fitted to the rotary table 61 in the same manner as in the first embodiment. A gear 61 a is provided on the outer peripheral surface of the rotary table 61, and a pinion 53 fixed to the lower end of the intermediate shaft 51 is engaged with the gear 61 a.
  Therefore, the rotary table 61 is moved by the drive gear 43 via the intermediate shaft 51 and the pinions 52 and 53, with the stirring blades.31Driven in the opposite direction and therefore the impeller31The stirring tank 3 is driven in the opposite direction.
[0043]
  Since the highly viscous fluid rotates in the direction of the arrow by the rotation of the stirring tank 3 and the stirring blade 31 rotates in the opposite direction, the stirring effect is further improved. Since the stirring effect changes by adjusting the rotation speed of the stirring blade and the rotation speed of the stirring tank 3, a simple continuously variable transmission such as a friction roller or a V-belt is interposed on the intermediate shaft 51, thereby stirring. By adjusting the rotational speed of the tank 3, the stirring effect can be finely adjusted according to the nature of the fluid in the stirring tank 3 and the purpose of stirring.
[0044]
【The invention's effect】
  The effects of the present invention can be summarized as follows.
thisAccording to the invention, a pair of stirring blades rotate in the same direction, and the rotation of each stirring blade is performed by rotating while rubbing in a state where the long diameter end of one stirring blade is substantially in contact with the side surface of the other stirring blade. Accordingly, the flow of the fluid that co-rotates is blocked by the other stirring blade to prevent the co-rotation and push it back in the direction opposite to the co-rotation direction. The fluid pushed back in this way moves to the stirring region of the other stirring blade and is stirred thereby. Further, the fluid layer adhering to the side surface of the other stirring blade is scraped off at the long-diameter end of the one stirring blade, and is guided to the stirring region of the one stirring blade, thereby being stirred.
  Therefore, the fluid in the stirring tank is evenly stirred evenly.
  Further, since the pair of stirring blades are driven by the planetary gear transmission to rotate and revolve, the pair of stirring blades are rotated at the same speed and revolved on the same track by a simple drive mechanism. be able to. Therefore, the manufacturing cost of the drive mechanism can be reduced, and the drive device can be reduced in size and weight.
[0045]
In addition, thisThe invention is such that the side surface of the stirring blade is a spiral surface, the pair of stirring blades rotate in the same direction, and the major axis end of one stirring blade is rubbing against the side surface of the other stirring blade. By rotating, the flow of the fluid co-rotating with the rotation of the individual agitating blades is blocked by the other agitating blade, preventing the co-rotation and pushing back in the direction opposite to the co-rotating direction. .
  Since the horizontal cross-sectional shape is almost elliptical and the side surfaces are spiral, the rotation strongly pushes the fluid downward (or upwards depending on the rotation direction), so that a strong vertical flow is generated in the viscous fluid. .
  Since the viscous fluid flows in a complicated path while changing the direction due to the stirring accompanying the rotation and the stirring by the flow in the vertical direction, the stirring is further promoted.
[0046]
  (Delete)
[0047]
Claims 1 to 3Effects of the invention
  Claim 1Since the invention according to the invention rotates the stirring blade and rotates the stirring tank, the stirring effect is significantly higher than that which produces the stirring effect only by the rotation of the stirring blade, and the rotation driving mechanism of the stirring tank. Is extremely simple, the stirring performance is not particularly different from that of the type that rotates and revolves, but the drive device can be remarkably simplified.
  In the invention according to claim 2, since the side surface of the stirring blade is a spiral surface, the rotation strongly pushes the fluid downward (or upward depending on the rotation direction). Produce. As a result, the viscous fluid flows in a complicated path while changing the direction due to the agitation accompanying rotation and the agitation by the flow in the vertical direction, so that the agitation is further promoted.
  Also,Claim 3According to the invention, the stirring performance can be appropriately adjusted by adjusting the rotation speed of the stirring tank while keeping the rotation speed of the stirring blade constant.
[Brief description of the drawings]
FIG. 1 is a plan view of an essential part of Embodiment 1. FIG.
FIG. 2 is a perspective view of a main part of the first embodiment.
FIG. 3 is a plan view showing an operation state of the first embodiment.
FIG. 4 is a plan view of a main part of the stirring blade driving device according to the first embodiment.
5 is a longitudinal sectional view of Example 1. FIG.
6 is a longitudinal sectional view of a main part of the stirring blade driving device of Example 1. FIG.
7 is a plan view of the main part of Example 2. FIG.
FIG. 8 is a perspective view of a main part of the second embodiment.
9A is a plan view of a stirring blade of Example 2, and FIG. 9B is a side view of the stirring blade.
FIGS. 10A to 10E are cross-sectional views taken along lines AA to EE in FIG. 9B;
11 is an overall external view of a stirring blade of Example 2. FIG.
FIG. 12 is a perspective view of Example 2 showing an example of an agitation drive device.
FIG. 13 is a perspective view of the second embodiment showing another example of the stirring device.
FIGS. 14A and 14B are plan views for explaining an example of the planar shape of the stirring blade in the embodiment, and FIG. 14B is a plan view for explaining another example of the planar shape. FIG. 6C is a plan view for explaining still another example.
[Explanation of symbols]
  1: Stirring blade
  2: Vertical axis
  3: Stirring tank
  4: Ring gear
  5: Planetary gear
  7: Stirring blade holder
  8: Bearing
  9: Carrier
  10: Bearing
  14: Support plate
  15: Drive shaft
  17: Coupling
  20: Support stand
  21: Guiding strut
  23: Screw shaft
  31: Stirring blade
  41: Guiding strut
  42: Support plate
  43: Drive gear
  44: Pinion
  45: Drive shaft
  51: Intermediate shaft
  52, 53: Pinion
  60: Support stand
  61: Rotary table
  61a: Gear

Claims (3)

In a stirrer that stirs and mixes the highly viscous fluid in the stirring tank by rotating a pair of vertical stirring blades in a vertically installed stirring tank,
The horizontal section of the stirring blade is substantially elliptical about the vertical axis,
The sum of 1/2 of the major axis length and 1/2 of the minor axis length of the elliptical shape is equal to the interaxial distance,
The rotation phases of one stirring blade and the other stirring blade are shifted by 90 degrees and rotate in the same direction at the same angular speed,
The side curved surface shape of the stirring blade is a shape in which the tip portion of one stirring blade is substantially in contact with the side surface portion of the other stirring blade at the full rotation position,
The pair of stirring blades are rotated by a driving mechanism,
The drive mechanism rotatably supports the drive gear on the support member, and rotatably supports the longitudinal axis and the intermediate shaft of the pair of agitating blades, and the pair of longitudinal axes and the intermediate shaft are pinned by the drive gear. Drive
A support table is provided with a rotary table with gears, and a stirring tank is detachably attached to the rotary table.
A stirrer for driving the gear of the rotary table with a pinion at the lower end of the intermediate shaft. The stirring device according to claim 1 , wherein a side surface of the stirring blade is a spiral surface. The stirring device according to claim 1 , wherein a continuously variable transmission is interposed on the intermediate shaft.

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