JP2021166966A - Rotary device, and method for controlling the same - Google Patents

Abstract

To provide a rotary device which has a torque meter directly provided on an outer shaft of a double shaft, and thereby can grasp and control a state of the rotary device on the basis of a rotation torque generated in the outer shaft, and a method for controlling the same.SOLUTION: A granulator 1 includes a double shaft 3 which has an inner shaft 31 and hollow outer shafts (upper side outer shaft 32U and lower side outer shaft 32D), a case member 25 for rotatably supporting the double shaft 3, an extrusion blade 33 connected to the outer shaft, a press blade 34 connected to the inner shaft 31, a first motor 41 for rotationally driving the upper side outer shaft 32U and the lower side outer shaft 32D, a second motor 42 for rotationally driving the inner shaft 31, a control device for controlling a rotation speed of the extrusion blade 33 and a rotation speed of the press blade 34, and a torque meter for measuring a rotation torque of the first motor 41, in which the control device performs feedback control so that a value of the rotation torque measured by the torque meter is within a predetermined range.SELECTED DRAWING: Figure 5

Description

The present invention relates to a rotating device and a control method thereof, and more particularly to controlling a rotating device having a rotating mechanism using a double shaft.

Conventionally, an extrusion granulator is known as a rotating device having a rotating mechanism using a double shaft (see, for example, Patent Document 1). The rotary device (extrusion granulator) described in Patent Document 1 is provided with an extrusion blade at the upper end of the outer drive shaft and a pressure blade at the upper end of the inner drive shaft of the double shaft. Then, the kneaded product put into the cylindrical hopper is pressurized by the pressure blades, guided to the screen via the extrusion blades to be granulated, and the granulated products are received by the rotary table.

Japanese Unexamined Patent Publication No. 2004-188357

The rotating device described in the patent document is provided with a granulation portion having a hopper, a screen, a pressure blade, and an extrusion blade on the upper side, and rotates the pressure blade and the extrusion blade on the lower side via a double shaft. A drive unit for moving is provided. The drive unit adopts a configuration in which the rotational power transmitted from the output shaft of the motor is separated inside the gear box to rotate the inner drive shaft and the outer drive shaft of the double shaft. The rotating device is configured to rotate the pressurizing blade on the inner shaft and rotate the extrusion blade on the outer shaft.

In the rotating device configured as described above, the torque meter is not provided on the outer shaft, and the state of the rotating device cannot be grasped and controlled based on the rotational torque generated on the outer shaft.

The present invention has been made in view of the above circumstances, and the problem to be solved by the present invention is to provide a torque meter on the outer shaft of the double shaft to rotate based on the rotational torque generated on the outer shaft. It is an object of the present invention to provide a rotating device capable of grasping the state of the device and performing control thereof, and a control method thereof.

Hereinafter, means for solving the above problems will be described.

The rotating device according to the present invention is the first one provided in a horizontally provided flat plate-shaped structure, a case member provided in the flat plate-shaped structure, a container provided in the case member, and the inside of the container. The rotating body, the second rotating body, the first motor for rotationally driving the first rotating body, the second motor for rotationally driving the second rotating body, and the first motor by the first motor. A control device for controlling the rotation speed of one rotating body and the rotation speed of the second rotating body by the second motor, and a torque meter for measuring the rotation torque of the first motor are provided. A rotating device that rotates an object charged into the container with the first rotating body and the second rotating body, and the control device has a predetermined value of rotational torque measured by the torque meter. Feedback control is performed so that it is within the range of.

Further, in the rotating device, the container includes a cylindrical screen provided on the upper side of the case member and a cylindrical hopper provided on the upper side of the screen, and the first rotating body is the screen. The second rotating body is a pressure blade provided inside the hopper, and the kneaded product charged into the hopper is lowered by the pressure blade. It is preferable to perform granulation by pressing the screen with the extrusion blades while pressurizing the screen.

Further, in the rotating device, the control device adjusts the rotation speed of the extrusion blade by the first motor and / or the first It is preferable to adjust the rotation speed of the pressurizing blade by the second motor.

Further, the rotating device is provided with a supply device for charging the kneaded material into the hopper, and the charging speed of the kneaded material by the supply device is controlled by the control device, and the control device measures the kneaded material with the torque meter. The rotational speed of the extrusion blades by the first motor, the rotational speed of the pressurizing blades by the second motor, and the kneaded product by the supply device so that the value of the rotational torque is within a predetermined range. It is preferable to adjust at least one of the charging speeds of.

Further, in the rotating device, the first rotating body is an outer peripheral stirring blade that rotates near the inner peripheral surface of the container, and the second rotating body is a stirring blade that rotates in the central portion of the container. Therefore, it is preferable that the stirring blade agitates the liquid in the central portion of the container and the outer peripheral stirring blade agitates the liquid in the vicinity of the inner peripheral surface of the container.

Further, the control method of the rotating device according to the present invention includes a flat plate-shaped structure provided horizontally, a case member provided in the flat plate-shaped structure, a container provided in the case member, and provided inside the container. A first rotating body and a second rotating body, a first motor for rotationally driving the first rotating body, a second motor for rotationally driving the second rotating body, and the first A method for controlling a rotating device, which comprises a torque meter for measuring the rotational torque of the motor of the above, and rotates an object put into the container by the first rotating body and the second rotating body. , Feedback control is performed so that the value of the rotational torque measured by the torque meter is within a predetermined range.

Further, in the control method of the rotating device, the container includes a cylindrical screen provided on the upper side of the case member and a cylindrical hopper provided on the upper side of the screen, and the first rotating body is The second rotating body is a pressure blade provided inside the hopper, and pressurizes the kneaded product charged into the hopper. It is preferable to perform granulation by pressing the screen with the extrusion blade while pressing the screen downward with the blade.

Further, in the control method of the rotating device, the rotational speed of the extrusion blade by the first motor and / or the second It is preferable to adjust the rotation speed of the pressurizing blade by the motor.

Further, in the control method of the rotary device, the control device includes a supply device for charging the kneaded material into the hopper, and the control device has the said first so that the value of the rotational torque measured by the torque meter is within a predetermined range. It is preferable to adjust at least one of the rotation speed of the extrusion blade by one motor, the rotation speed of the pressure blade by the second motor, and the input speed of the kneaded product by the supply device. ..

Further, in the control method of the rotating device, the first rotating body is an outer peripheral stirring blade that rotates near the inner peripheral surface of the container, and the second rotating body rotates at the central portion of the container. It is preferable that the stirring blades stir the liquid in the central portion of the container with the stirring blades and the liquid in the vicinity of the inner peripheral surface of the container with the outer peripheral stirring blades.

According to the rotating device according to the present invention and the control method thereof, by providing a torque meter on the outer shaft of the double shaft, the state of the rotating device is grasped and controlled based on the rotational torque generated on the outer shaft. It becomes possible.

The upper perspective view which shows the rotating apparatus which concerns on one Embodiment. The lower perspective view which shows the rotating apparatus which concerns on one Embodiment. A cross-sectional view showing a rotating device according to an embodiment. A cross-sectional view showing an assembly configuration of a motor or the like in a rotating device according to an embodiment. The side view which shows the control structure of the rotating apparatus which concerns on one Embodiment. A flowchart for controlling a rotating device according to an embodiment. The flowchart at the time of performing granulation torque control in the rotating apparatus which concerns on one Embodiment. The cross-sectional view which shows the rotating apparatus which concerns on another embodiment.

[Extrusion Granulator 1]
First, with reference to FIGS. 1 to 5, a schematic configuration of an extrusion granulator (hereinafter, simply referred to as “granulation machine”) 1 which is an embodiment of a rotating device according to the present invention will be described. In the granulation machine 1 according to the present embodiment, the granulation unit 2 is provided on the upper surface of the housing 11, the drive unit 4 and the torque measurement unit 7 are provided inside the housing 11, and the granulation unit 2 and the drive unit are provided. 4 and the torque measuring unit 7 are connected via the double shaft 3. Further, as shown in FIG. 5, a raw material supply unit 9 is connected to the granulation unit 2.

In the granulation machine 1, a kneaded product kneaded by a kneader (not shown) is charged from an upper hopper 21 formed in the granulation portion 2, and the driving force of the drive portion 4 is applied to the granulation portion 2 via the double shaft 3. The kneaded product is granulated into the granulated product in the granulation unit 2 by being transmitted to the granulated product. The granulated product granulated by the granulation portion 2 is discharged to the outside through the discharge chute 15 of the granulation portion 2.

The housing 11 is a structure constituting the granulator 1. Wheels 12 are provided at four corners on the lower surface of the housing 11. An opening is formed on the upper surface of the housing 11, and one side (right side in FIG. 3) of the opening is closed by the cover 11a. On the other side (left side in FIG. 3) of the opening of the housing 11, a base plate 13 which is a rectangular plate-shaped member supporting the granulation portion 2 and the drive portion 4 is horizontally provided.

The base plate 13 is an embodiment of the flat plate-like structure in the present invention. Ring-shaped hooked portions 13a are fixed to the four corners of the upper surface of the base plate 13. When maintaining or replacing the drive unit 4, the granulation unit 2 and the cover 11a are removed, and the hooked portion 13a is engaged with a hook member such as a lift machine (not shown) to lift the drive unit 4. When the hooked portion 13a is lifted, the drive unit 4 connected to the base plate 13 is also lifted, so that the drive unit 4 can be easily maintained or replaced.

[Granulation part 2]
A granulation portion 2 is provided on the upper side of the base plate 13. The granulation portion 2 includes a table cover 14, a discharge chute 15, an upper hopper 21, a lower hopper 22, a screen guide 23, a screen 23a, a turntable 24, a case member 25, an extrusion blade 33, a pressure blade 34, and the like. It is composed of. Hereinafter, each configuration will be described in order. The granulation portion 2 may be provided on the lower side of the base plate 13. In this case, it is preferable that the granulation blade 33 is rotated by the inner shaft 31 of the double shaft 3 and the pressure blade 34 is rotated by the outer shaft of the double shaft 3.

A case member 25, which is a bearing case, is fixed to the central portion of the base plate 13. Specifically, as shown in FIG. 4, the base plate 13 has an insertion hole 13b that penetrates the base plate 13 in the thickness direction (vertical direction), and the case member 25 is inserted into the insertion hole 13b. The portion 25a is fitted. As a result, the case member 25 is positioned and provided with respect to the base plate 13.

A screen guide 23, which is one of the containers according to the present invention, is connected to the upper surface of the case member 25 via a ring-shaped base collar 26 and a disk-shaped base plate 27. A cylindrical screen 23a is provided between the outer peripheral surface of the base plate 27 and the inner peripheral surface of the screen guide 23. The screen 23a has a large number of holes that communicate with each other inside and outside.

Inside the screen 23a, the extrusion blade 33, which is the first rotating body of the present invention, is rotatably provided. By rotating the extrusion blade 33, the kneaded material is pressed against the screen 23a to be granulated. In the granulator 1, the particle size of the granulated product can be adjusted by changing the specifications (plate thickness and hole diameter) of the screen 23a.

As shown in FIG. 4, the extrusion blade 33 is configured by combining the extrusion arm portion 61 and the extrusion portion 62. The extrusion arm portion 61 is assembled so as not to rotate relative to the outer shaft upper end portion 32b of the outer shaft (upper outer shaft 32U). As a result, the rotation from the outer shaft is transmitted to the extrusion blades 33, and the extrusion blades 33 can rotate inside the screen 23a.

On the upper surface of the screen guide 23 (above the screen 23a), a cylindrical lower hopper 22 having the same inner diameter as the screen 23a is detachably attached to the screen guide 23. The lower hopper 22 is one of the containers according to the present invention, like the screen 23a. That is, the screen 23a and the lower hopper 22 are provided on the case member 25 as a container according to the present invention. A packing, which is a ring member, is inserted between the screen guide 23 and the lower hopper 22.

A pressure blade 34, which is a second rotating body of the present invention, is rotatably provided inside the lower hopper 22. By rotating the pressurizing blade 34, the kneaded product is pressurized downward on the side where the extrusion blade 33 is provided. The upper hopper 21 is assembled on the upper side of the lower hopper 22. The upper portion of the upper hopper 21 is formed in a shape whose diameter increases toward the upper side, and the lattice member 21a is placed on the upper end portion thereof. The kneaded product is put into the granulation section 2 from the raw material supply section 9, which will be described later, via the upper hopper 21 and the lower hopper 22. The upper hopper 21 and the lower hopper 22 can be integrally formed, or the upper hopper 21, the lower hopper 22, the screen guide 23, and the screen 23a can be integrally formed.

Further, the lower hopper 22 does not necessarily have the same inner diameter as the screen 23a, and may be smaller than the screen 23a. It is also possible to remove the lower hopper 22 and attach the upper hopper 21 directly to the screen 23a via the screen guide 23.

Further, in order to prevent the kneaded material pushed upward by the pressure blade 34 from rising upward, a rise prevention portion may be provided on the upper side of the pressure blade 34 on the inner peripheral surface of the lower hopper 22. The rise prevention portion can be formed by providing a ring-shaped member having a diameter smaller than that of the lower hopper 22 on the inner peripheral surface of the lower hopper 22.

As shown in FIG. 4, the pressure blade 34 is configured by combining the blade support portion 51, the blade tip portion 52, and the scraping blade 53 one by one, and providing two sets facing each other by 180 degrees. The blade support portion 51 is non-rotatably connected to the inner shaft upper end portion 31b of the inner shaft 31. As a result, the rotation from the inner shaft 31 is transmitted to the pressure blade 34, and the pressure blade 34 can rotate inside the lower hopper 22.

The table cover 14 is a cylindrical member, and is provided on the upper surface of the base plate 13 so as to surround the case member 25. Inside the table cover 14, a ring-shaped turntable 24 is provided above the case member 25. A small gap is provided between the inner periphery of the turntable 24 and the outer periphery of the base collar 26.

A table gear 24a is assembled on the lower surface of the turntable 24, and the table gear 24a is connected to a table motor 16 fixed to the lower surface of the base plate 13 by a connecting shaft or the like (not shown). When the table motor 16 is driven, the turntable 24 rotates inside the table cover 14 along the outer peripheral surface of the base collar 26. Inside the table cover 14, a leak-proof packing 14a is arranged on the outside of the turntable 24.

Granulations generated through the screen 23a fall onto the upper surface of the turntable 24. A discharge chute 15 is provided at the end of the table cover 14 (the left end in FIG. 3). A guide plate 15a is fixed on the upper side of the turntable 24 in a posture orthogonal to the turntable 24. The granulated material that has fallen on the upper surface of the turntable 24 is guided by the guide plate 15a as the turntable 24 rotates, and is discharged from the discharge chute 15.

[Torque measuring unit 7]
A torque measuring unit 7 is provided on the lower side of the base plate 13. The torque measuring unit 7 is configured by inserting a torque meter into the torque meter case 71. The torque meter includes a stator 72 having an annular portion and a hollow cylindrical rotor 73 that rotates in non-contact with the stator 72 inside the annular portion of the stator 72. In other words, the stator 72 is fixed to the base plate 13 via the case member 25 in a posture in which the rotor 73 is inserted inside the annular portion. Hereinafter, the connection configuration of the torque measuring unit 7 will be described with reference to FIG.

The torque meter case 71 is a substantially cylindrical member in which a disk-shaped upper plate 71a and a lower plate 71b are connected by a cylindrical connecting portion 71c having a partially opened portion, respectively. The upper plate 71a has an insertion hole 71d that penetrates the upper plate 71a in the thickness direction (vertical direction), and the insertion portion 25a of the case member 25 is fitted into the insertion hole 71d. As a result, the torque meter case 71 is positioned with respect to the base plate 13 via the case member 25. The connecting portion 71c does not necessarily have to have a cylindrical shape as long as the torque meter case 71 can be accommodated.

A stator 72 and a rotor 73 are inserted into the torque meter case 71, and a part of the stator 72 extends outward from the opening of the connecting portion 71c. It is also possible to configure the stator 72 to be completely housed inside the torque meter case 71 as a whole. In the present embodiment, the stator 72 is fixed to the case member 25 by a fixing member such as a screw. Further, the rotor 73 is inserted between the upper outer shaft 32U and the lower outer shaft 32D whose outer shaft is vertically divided, and is coupled to the upper outer shaft 32U and the lower outer shaft 32D, whereby the upper outer shaft is connected. It rotates integrally with the 32U and the lower outer shaft 32D.

The stator 72 can non-contactly measure the rotational torque generated in the rotor 73 that rotates inside the annular portion. Therefore, the stator 72 can be provided on a member other than the case member 25, for example, the base plate 13 or the torque meter case 71, by a fixing member such as a screw. In this way, the stator 72 may be directly fixed to the base plate 13 or indirectly fixed to the base plate 13 via other members such as the case member 25 and the torque meter case 71. ..

In the torque meter configured as described above, the strain of the shaft in the rotor 73 (outer shaft) is detected by a strain gauge and converted into a frequency. Then, this frequency is transmitted from the rotor 73 to the stator 72 by infrared rays, the frequency is converted into a torque value which is a physical quantity by the stator 72, and is output as a rotational torque generated on the outer shaft. The power supply to the rotor 73 is supplied in a non-contact manner by electromagnetic induction from the stator 72.

[Drive unit 4]
A drive unit 4 is provided below the torque measurement unit 7. The drive unit 4 is configured by connecting the first motor 41 and the second motor 42 by a disk-shaped adapter 43. Hereinafter, the connection configuration of the drive unit 4 will be described with reference to FIG.

The first motor 41 is assembled to the lower side of the base plate 13 via a torque measuring unit 7 (specifically, a torque meter case 71). The first motor 41 is internally provided with a speed reducer including the first hollow gear 41e. An upper flange 41a, which is an upper mounting portion, and a lower flange 41b, which is a lower mounting portion, are fixed to the upper and lower sides of the first motor 41. Then, the upper flange 41a is assembled to the torque meter case 71 by fixing members such as bolts and nuts, so that the first motor 41 is fixed to the torque meter case 71.

The second motor 42 is assembled to the lower side of the first motor 41 via the adapter 43. The second motor 42 is internally provided with a speed reducer including the second hollow gear 42c. A second flange 42a, which is a second mounting portion, is fixed to the second motor 42. Then, by assembling the second flange 42a to the lower flange 41b of the first motor 41 via the adapter 43, the second motor 42 is connected to the first motor 41.

[Double axis 3]
In the granulation machine 1, the granulation unit 2 and the drive unit 4 are connected via a double shaft 3. As shown in FIG. 4, the double shaft 3 includes an inner shaft 31 and a hollow outer shaft that houses the inner shaft 31 inside. The outer shaft is vertically divided into an upper outer shaft 32U which is a tip portion and a lower outer shaft 32D which is a base end portion, and the upper outer shaft 32U and the lower outer shaft 32D form a rotor which constitutes a torque meter. It is connected by 73. The inner shaft 31 is inserted into the rotor 73 as shown in FIG. In other words, the rotor 73 is inserted between the upper outer shaft 32U and the lower outer shaft 32D with the inner shaft 31 inserted inside. The outer shaft is formed to be shorter in the vertical direction than the inner shaft 31. Therefore, the upper and lower ends of the outer shaft (the upper end of the upper outer shaft 32U and the lower end of the lower outer shaft 32D) are located in the middle of the inner shaft 31 in the vertical direction.

The double shaft 3 is rotatably supported by the case member 25 via a bearing, so that the double shaft 3 is provided so as to penetrate the base plate 13 in the vertical direction. Inside the case member 25, a seal plate 38 covering the upper part of the bearing is provided on the outer peripheral surface of the upper outer shaft 32U.

As shown in FIG. 4, the outer shaft lower end portion 32a formed at the lower end of the lower outer shaft 32D is connected to the first hollow gear 41e in the first motor 41. On the other hand, the outer shaft upper end portion 32b formed at the upper end of the upper outer shaft 32U is connected to the extrusion blade 33 which is the first rotating body. As a result, the driving force of the first motor 41 can be transmitted to the extrusion blade 33 via the lower outer shaft 32D, the rotor 73, and the upper outer shaft 32U. In other words, the first motor 41 rotationally drives the extrusion blade 33 via the outer shaft.

A conical collar 35 through which the inner shaft 31 is inserted is provided above the upper end portion 32b of the outer shaft of the upper outer shaft 32U. Further, on the upper side of the conical collar 35, a cylindrical collar member 36 through which the inner shaft 31 is inserted is provided.

Further, as shown in FIG. 4, the inner shaft lower end portion 31a formed at the lower end of the inner shaft 31 is connected to the second hollow gear 42c in the second motor 42. On the other hand, the upper end portion 31b of the inner shaft formed at the upper end of the inner shaft 31 is connected to the pressure blade 34 which is the second rotating body. As a result, the driving force of the second motor 42 can be transmitted to the pressure vanes 34 via the inner shaft 31. In other words, the second motor 42 rotationally drives the pressurizing blade 34 via the inner shaft 31. The end cap 37 is put on the inner shaft upper end portion 31b of the inner shaft 31.

In the granulation machine 1 configured as described above, when the kneaded material is put into the upper hopper 21 of the granulation portion 2, the second motor 42 rotationally drives the pressure vanes 34 to add the kneaded material downward. Press. Then, the first motor 41 rotationally drives the extrusion blades 33 to press the kneaded material into the holes of the screen 23a and allow the kneaded material to pass therethrough, thereby producing granulated products. The generated granulated material falls on the upper surface of the rotating turntable 24, is guided by the guide plate 15a, and is discharged from the discharge chute 15.

The granulator 1 according to the present embodiment is configured to measure the rotational torque of the outer shaft more accurately by directly providing a torque meter on the outer shaft of the double shaft 3. Specifically, the outer shaft is divided into an upper outer shaft 32U and a lower outer shaft 32D, and a rotor 73 of a torque meter is integrally inserted between them. Thereby, the state of the rotating device can be grasped based on the rotational torque generated on the outer shaft. In the present embodiment, by measuring the rotational torque generated in the extrusion blade 33 driven by the outer shaft with the minimum transmission loss, it is possible to accurately grasp the extrusion granulation state of the kneaded product and the like.

Further, in the granulator 1 according to the present embodiment, the inner shaft 31 can be inserted inside the rotor 73 by forming the rotor 73 into a hollow cylindrical shape. Then, the stator 72 is fixed to the case member 25 in a posture in which the rotor 73 is inserted inside. With this configuration, even when two rotating bodies (extruded blade 33 and pressure blade 34) are rotationally driven by using the double shaft 3 as in the granulation machine 1, the inner shaft 31 is affected. It is possible to appropriately measure the rotational torque generated on the outer shaft.

[Positioning means]
In the granulator 1 according to the present embodiment, the base plate 13, the case member 25, the torque meter case 71, and the upper flange 41a of the first motor 41 are connected to the axis of the outer shaft when they are connected to each other. , A positioning means capable of positioning so as to coincide with the axis of the first hollow gear 41e in the first motor 41 is provided.

Specifically, as shown in FIG. 4, a circular recessed portion 71e is formed on the lower surface of the torque meter case 71 as one of the positioning means. On the other hand, on the upper surface of the upper flange 41a, an upper insertion portion 41c, which is a circular convex portion, is formed as the other side of the positioning means. Then, the inner diameter of the inserted portion 71e and the outer diameter of the upper insertion portion 41c are formed to be substantially the same, and the upper insertion portion 41c is inserted into the inserted portion 71e, so that the first motor 41 is torqued. It is positioned with respect to the total case 71. In this embodiment, the torque meter case 71 is positioned with respect to the case member 25 and the base plate 13. Therefore, with the above configuration, the axis of the outer shaft and the axis of the first hollow gear 41e in the first motor 41 coincide with each other.

Further, in the granulator 1 according to the present embodiment, the lower flange 41b of the first motor 41 and the second flange 42a of the second motor 42 are connected to the shaft of the inner shaft 31 when they are connected to each other. The center and the axis of the second hollow gear 42c in the second motor 42 can be positioned so as to coincide with each other.

Specifically, as shown in FIG. 4, a lower insertion portion 41d, which is a circular convex portion, is formed on the lower surface of the lower flange 41b as a second positioning means. On the other hand, on the upper surface of the second flange 42a, a second insertion portion 42b, which is a circular convex portion, is also formed as a second positioning means. Further, an inserted portion 43a, which is a circular recess, is formed on the upper surface of the adapter 43, which is one of the second positioning means, and a circular through hole 43b is opened in the central portion.

Then, the lower insertion portion 41d is inserted into the inserted portion 43a, and the second insertion portion 42b is inserted into the through hole 43b, so that the second motor 42 bases via the adapter 43 and the first motor 41. It is positioned with respect to the plate 13. As a result, the axis of the inner shaft 31 and the axis of the second hollow gear 42c in the second motor 42 coincide with each other.

In the granulation machine 1 according to the present embodiment, as described above, the two motors 41 and 42 are positioned with respect to the base plate 13 and the case member 25, which are flat plates, via the torque meter case 71. be able to. As a result, the center of the double shaft 3 (the center of the inner shaft 31 and the center of the outer shaft) and the center of each of the motors 41 and 42 can be easily aligned (centered).

As described above, in the granulation machine 1 according to the present embodiment, the connection configuration of the two motors 41 and 42 via the torque meter case is simplified with respect to the base plate 13 and the case member 25, and the double shaft is used. By facilitating the alignment between the center of 3 and the center of each of the motors 41 and 42, it is possible to simplify the on-site work when repairing or maintaining the granulator 1. In particular, in a rotating device such as the granulator 1, which is difficult to transport to another place for repair or maintenance, the connection configuration of the flat plate structure and the two motors is simplified as in the present embodiment. The configuration to be used is suitable.

Further, when measuring the torque in the granulation machine 1, if the axis is not accurately aligned, the strain of the shaft appears as torque (noise) in the data of the torque meter when the granulation machine 1 is operated. Therefore, as in the granulation machine 1 according to the present embodiment, the alignment (centering) of the connection configuration between the base plate 13 which is a flat plate structure and the two motors 41 and 42 can be easily and surely performed. The configuration will be suitable.

[Raw material supply unit 9]
As shown in FIG. 5, a raw material supply unit 9 which is a supply device for charging the kneaded material into the upper hopper 21 is provided above the granulation unit 2 in the granulation machine 1 according to the present embodiment. The raw material supply unit 9 includes a raw material supply motor 91, a raw material storage unit 92, a supply blade 93, a supply pipe 94, and the like.

The raw material storage unit 92 is a tubular member in which the kneaded material is stored. A supply blade 93 is rotatably provided at the bottom of the raw material storage unit 92. The supply blade 93 is rotated by driving the raw material supply motor 91, and the kneaded material stored in the raw material storage unit 92 is displaced downward. The kneaded product displaced downward by the supply blade 93 is charged into the upper hopper 21 via the supply pipe 94. In this way, in the granulation machine 1, the amount of raw material supplied to the granulation unit 2 (the amount of raw material supplied per unit time, the same applies hereinafter) is adjusted by changing the rotation speed of the raw material supply motor 91.

In the present embodiment, the circle feeder is used as the raw material supply unit 9 as described above, but another configuration (horizontal axis screw feeder or belt feeder) is adopted as the feeder of the kneaded material (wet powder). Is also possible. Even in this case, the supply amount of the kneaded product can be adjusted by adjusting the frequency of the motor.

[Control device]
In the granulation machine 1 according to the present embodiment, as shown in FIG. 5, the drive of the granulation machine 1 (specifically, the first motor 41, the second motor 42, and the raw material) is driven on the outside of the housing 11. A control device for controlling the drive of the supply motor 91) is provided.

The control device in the present embodiment is a storage unit that stores a program or the like used to drive the granulation machine 1, a calculation unit that performs various arithmetic processes, a communication unit that transmits / receives signals to / from other devices, and an input / output unit. It is a computer equipped with such as. As shown in FIG. 5, each motor in the granulator 1 is electrically connected to a control device, and the rotational drive in each motor is controlled by receiving a command signal from the control device. In other words, according to the signal from the control device, the rotation speed of the extrusion blade 33 by the first motor 41, the rotation speed of the pressurizing blade 34 by the second motor 42, and the input of the kneaded product by the raw material supply motor 91. The speed is controlled. Further, the stator 72 of the torque measuring unit 7 in the granulator 1 is electrically connected to the control device, and the rotational torque of the outer shaft measured by the torque measuring unit 7 is transmitted to the control device.

As will be described later, the control device can change the rotational drive of each motor based on the rotational torque of the outer shaft received from the torque measuring unit 7, and control the granulation state and eventually the state of the product granules. In the granulator 1 according to the present embodiment, the first motor 41, the second motor 42, and the second motor 42 according to the state of the kneaded material and the like are based on the rotational torque generated in the extrusion blade 33 driven by the outer shaft. The rotation speed of the raw material supply motor 91 can be adjusted.

[Granulation torque and collapse rate]
Next, the granulation method performed by the granulator 1 will be described. When granulation is performed by the extrusion blade 33 attached to the outer shaft (upper outer shaft 32U) of the double shaft 3 as in the granulation machine 1 according to the present embodiment, the rotational torque of the outer shaft is measured. , The actual granulation torque (rotational torque generated in the extrusion blade 33) can be measured.

The applicant of the present application conducted an experiment to investigate the relationship between the granulation torque in the granulation machine 1 and the disintegration rate of the granulated product. Specifically, using a material obtained by adding 10% bentonite to calcium carbonate powder and kneading with water at 16%, granulation was performed with different granulation torques. Then, the relationship between the granulation torque and the disintegration rate of the granules obtained by each granulation torque after drying was investigated. As a result, it was found that there is a negative correlation between the granulation torque and the collapse rate. That is, it was found that in the granulation machine 1, the disintegration rate of the granulated product can be kept constant by adjusting the granulation torque to be constant by feedback control. The disintegration rate of the granules was measured according to the hardness measurement procedure of all farming methods.

Here, it is known that the processing capacity of the granulation machine 1 is a factor that greatly affects the granulation torque, and that there is a positive correlation between the granulation torque and the processing capacity of the granulation machine 1. .. Further, the processing capacity of the granulation machine 1 can be adjusted by the rotation speed of the extrusion blade 33 in the granulation machine 1 and the amount of raw material supplied to the granulation unit 2.

Further, the granulation torque can be adjusted by the rotation speed of the pressurizing blade 34. Specifically, when the rotation speed of the extrusion blade 33 is constant, a positive correlation is observed between the rotation speed of the pressure blade 34 and the granulation torque. Based on these results, the applicant of the present application applies the rotational speed of the extrusion blade 33, the amount of raw material supplied to the granulation section 2, and / or the addition so that the granulation torque in the granulation machine 1 falls within a certain range. By controlling the rotation speed of the pressure blade 34, it is possible to keep the disintegration rate of the granulated granules constant. In other words, in the granulation method in the granulation machine 1, it is possible to stably obtain a granulated product having a constant hardness by controlling the granulation torque to be kept constant as follows.

[Control method for granulator 1]
Next, the granulation method performed by the granulator 1 will be described with reference to the flowcharts shown in FIGS. 6 and 7. In the granulation machine 1 according to the present embodiment, first, as shown in step S01 in FIG. 6, a target value (T) of the granulation torque and an allowable value (x) away from the target value (T) are set. , Input to the control device. As a result, the upper limit of the permissible granulation torque (hereinafter, simply referred to as the "upper limit") (T + x) and the lower limit of the permissible granulation torque (hereinafter, simply referred to as the "lower limit") ( Tx) is set.

Next, as shown in step S02 in FIG. 6, the granulator 1 is started to drive the first motor 41, the second motor 42, the table motor 16, and the raw material supply motor 91. As a result, the supply of the kneaded product from the raw material storage unit 92 to the granulation unit 2 and the granulation in the granulation unit 2 are started.

Next, as shown in step S03 in FIG. 6, the current value of the rotational torque (granulation torque) of the outer shaft received from the torque measuring unit 7 (hereinafter, simply referred to as “current torque value”) is the lower limit value. It is determined whether or not it is larger than (Tx). If it is determined that the current torque value is not larger than the lower limit value (Tx), the process proceeds to step S04. If it is determined that the current torque value is larger than the lower limit value (Tx), the process proceeds to step S05.

In step S04 in FIG. 6, the rotation speed of the first motor 41 and / and the raw material supply motor 91 is increased to increase the rotation speed of the extrusion blade 33 in the granulator 1 and the amount of raw material supplied to the granulation unit 2. do. As a result, the processing capacity of the granulator 1 is increased and the current torque value is increased. After that, the process returns to step S03.

In step S05 in FIG. 6, the granulation torque control shown in the flowchart in FIG. 7 is performed. In the granulation torque control, as shown in step S51 in FIG. 7, it is determined whether or not the current torque value is larger than the target value (T). If it is determined that the current torque value is not larger than the target value (T), the process proceeds to step S52. If it is determined that the current torque value is larger than the target value (T), the process proceeds to step S53.

In step S52 in FIG. 7, the rotation speed of the first motor 41 and / and the raw material supply motor 91 is increased to increase the rotation speed of the extrusion blade 33 in the granulator 1 and the amount of raw material supplied to the granulation unit 2. do. As a result, the processing capacity of the granulator 1 is increased and the current torque value is increased. Then, the process returns to step S51.

In step S53 in FIG. 7, the current torque value is reduced by lowering the rotation speed of the second motor 42 and reducing the rotation speed of the pressurizing blade 34 in the granulator 1. Then, the process proceeds to step S54.

In step S54 in FIG. 7, it is determined whether or not the current torque value is larger than the upper limit value (T + x). If it is determined that the current torque value is larger than the upper limit value (T + x), the process proceeds to step S55. If it is determined that the current torque value is not larger than the target value (T), the process proceeds to step S56.

In step S55 in FIG. 7, the rotation speed of the first motor 41 and / and the raw material supply motor 91 is reduced to reduce the rotation speed of the extrusion blade 33 in the granulator 1 and the amount of raw material supplied to the granulation unit 2. do. As a result, the processing capacity of the granulator 1 is reduced, and the current torque value is reduced. Then, the process returns to step S53.

In step S56 in FIG. 7, it is determined whether or not the current torque value is smaller than the target value (T). If it is determined that the current torque value is not smaller than the target value (T), the process returns to step S54. If it is determined that the current torque value is smaller than the target value (T), the process proceeds to step S57.

In step S57 in FIG. 7, the current torque value is increased by increasing the rotation speed of the second motor 42 and increasing the rotation speed of the pressurizing blade 34 in the granulator 1. Then, the process proceeds to step S58.

In step S58 in FIG. 7, it is determined whether or not the current torque value is smaller than the lower limit value (Tx). If it is determined that the current torque value is smaller than the lower limit value (Tx), the process proceeds to step S59. If it is determined that the current torque value is not smaller than the lower limit value (Tx), the process returns to step S51.

In step S59 in FIG. 7, the rotation speed of the first motor 41 and / and the raw material supply motor 91 is increased to increase the rotation speed of the extrusion blade 33 in the granulator 1 and the amount of raw material supplied to the granulation unit 2. do. As a result, the processing capacity of the granulator 1 is increased and the current torque value is increased. Then, the process returns to step S57.

As described above, in the granulator 1 according to the present embodiment, in the control device, the value (current torque value) of the rotational torque (granulation torque) measured by the torque meter in the torque measuring unit 7 is within a predetermined range. The feedback control is performed as follows.

Specifically, when the current torque value is larger than the target value (T), the rotation speed of the second motor 42 is lowered and the rotation speed of the pressurizing blade 34 in the granulator 1 is reduced to reduce the current torque. Decrease the value. On the other hand, when the current torque value is smaller than the target value (T), the rotation speed of the second motor 42 is increased and the rotation speed of the pressurizing blade 34 in the granulator 1 is increased to increase the current torque value. do.

When the current torque value is larger than the upper limit value (T + x), the rotation speed of the first motor 41 or the raw material supply motor 91 is lowered, and the rotation speed of the extrusion blade 33 in the granulator 1 or the granulation unit 2 is reached. Reduce the amount of raw material supplied. Further, the current torque value is reduced by lowering the rotation speed of the second motor 42 and reducing the rotation speed of the pressurizing blade 34 in the granulator 1. On the other hand, when the current torque value is smaller than the lower limit value (Tx), the rotation speed of the first motor 41 or the raw material supply motor 91 is increased, and the rotation speed of the extrusion blade 33 in the granulator 1 and the granulation portion are increased. Increase the amount of raw material supplied to 2. Further, the current torque value is increased by increasing the rotation speed of the second motor 42 and increasing the rotation speed of the pressurizing blade 34 in the granulator 1.

As described above, in the control device of the granulator 1, the rotational speed of the extrusion blade 33 by the first motor 41 is set so that the value of the rotational torque measured by the torque meter in the torque measuring unit 7 is within a predetermined range. It is configured to adjust the rotation speed of the pressurizing blade 34 by the second motor 42 and the input speed of the kneaded product by the raw material supply unit 9. As a result, the state of the granulator 1 can be grasped and controlled based on the rotational torque generated on the outer shaft. More specifically, by controlling the granulation machine 1 so as to keep the granulation torque constant, a granulated product having a constant hardness can be stably obtained.

In the granulator 1, the rotational speed of the extrusion blade 33 by the first motor 41 and the pressurizing blade by the second motor 42 so that the value of the rotational torque measured by the torque meter is within a predetermined range. It is also possible to adjust at least one of the rotation speed of 34 and the input speed of the kneaded product by the raw material supply unit 9. Even in this case, by controlling the granulation machine 1 so as to keep the granulation torque constant, it is possible to stably obtain a granulated product having a constant hardness.

Further, when the raw material supply unit 9 is not provided in the granulator 1, or when the raw material supply amount is not controlled by the control device, the value of the rotational torque measured by the control device in the granulator 1 with the torque meter is predetermined. It is also possible to adjust the rotation speed of the extrusion blade 33 by the first motor 41 and / or the rotation speed of the pressure blade 34 by the second motor 42 so as to be within the range of. Even in this case, by controlling the granulation machine 1 so as to keep the granulation torque constant, it is possible to stably obtain a granulated product having a constant hardness. In the present embodiment, the torque meter is directly attached to the outer shaft of the double shaft 3, but the position of the torque meter is not limited as long as the torque can be measured. For example, it is possible to assemble a torque meter via a speed reducer to measure the torque.

[Another Embodiment (stirring device)]
The rotating device according to the present invention is not only applied to the granulator 1 of the present embodiment, but can be applied to all rotating devices using a double shaft. For example, as shown in FIG. 8, the present invention can be applied to the stirring device 101, which is another embodiment of the rotating device.

The stirring device 101 according to the present embodiment is a device that stirs the liquid L stored inside the container 120 in the stirring unit 102. The stirring device 101 rotatably supports a double shaft having an inner shaft 131 and a hollow outer shaft (upper outer shaft 132U and lower outer shaft 132D) accommodating the inner shaft 31 inside, and the double shaft. The case member 125, which is a bearing case, the outer peripheral stirring blade 133, which is the first rotating body connected to the lower end of the lower outer shaft 132D, and the second rotating body, which is connected to the lower end of the inner shaft 131. It includes a stirring blade 134, a first motor 141 that rotationally drives the upper outer shaft 132U and the lower outer shaft 132D, and a second motor 142 that rotationally drives the inner shaft 131. Then, the stirring device 101 stirs the liquid L in the central portion of the container 120 with the stirring blade 134, and stirs the liquid L near the inner peripheral surface of the container 120 with the outer peripheral stirring blade 133.

Further, the outer shaft is provided with a torque measuring unit 107 for measuring the rotational torque generated on the outer shaft. The torque measuring unit 107 includes a hollow rotor 173 and a stator 172 inserted between the upper outer shaft 132U and the lower outer shaft 132D, and is housed in the torque meter case 171.

Also in the stirring device 101 configured as described above, a torque meter is provided on the outer shaft of the double shaft, and the inner shaft 131 is inserted inside the rotor 173, so that the stirring device 101 is based on the rotational torque generated on the outer shaft. You can grasp the state of. Specifically, by comparing and measuring the relationship between the rotational torque of the outer shaft and the viscosity in advance, it is possible to perform stirring control by the control device while measuring and monitoring the viscosity of the liquid in real time.

In the existing in-line viscometer, the liquid inside is once taken out of the system of the stirring container for measurement, or the viscometer is inserted into a portion of the container where there is no contact with the stirring blade to measure the viscosity. However, all of them are local measurements, and it cannot be said that the total viscosity in the container is measured. When the container is heated with a jacket or the like, a temperature difference occurs between the inside of the container and the measuring part, which makes it difficult to measure the viscosity accurately.

According to the stirring device 101 according to the present embodiment, it is possible to measure the stirring torque value (≈viscosity) while stirring the entire inside of the container 120, and the measured values are the temperature of the container jacket and the rotation of the central axis. By feeding back to the speed, it is possible to control the mixing end point by the viscosity and to perform the mixing operation while maintaining a constant viscosity. Further, by moving the position of the blade closer to the center of the container, it is possible to measure the viscosity of the entire container including the inside of the tank.

In the stirring device 101, it is possible to estimate the viscosity to some extent by using the load of the motor that drives the stirring blade 134, but in this embodiment, since the actual stirring torque of the liquid is measured, the capacity of the motor is increased. It is possible to obtain a measurement result close to the true viscosity without depending on it.

1 Extruder granulator (rotating device)
2 Granulation part 3 Double shaft
4 Drive unit 7 Torque measurement unit
9 Raw material supply department
11 Housing 11a cover
12 Wheels 13 Base plate (structure)
13a Hooked part 13b Inserted hole
14 Table cover 14a Leakage packing
15 Discharge chute 15a Guide plate
16 Table motor 21 Upper hopper
21a Lattice member 22 Lower hopper (container)
23 Screen Guide 23a Screen (Container)
24 turntable 24a table gear
25 Case member 25a Insertion part
26 base color 27 base plate
31 Inner shaft 31a Lower end of inner shaft
31b Inner shaft upper end 32U Upper outer shaft
32D Lower outer shaft 32a Lower end of outer shaft
32b Upper end of outer shaft 33 Extruded blade (first rotating body)
34 Pressurized blade (second rotating body)
35 Conical color 36 Color member
37 End cap 38 Seal plate
41 First motor 41a Upper flange
41b Lower flange 41c Upper insertion part
41e 1st hollow gear 42 2nd motor
42a Second flange 42c Second hollow gear
43 adapter
51 Blade support 52 Blade tip
53 Scraping blade
61 Extruded arm 62 Extruded
71 Torque meter case 71a Upper plate
71b Lower plate 71c Connection
71d Insertion hole 71e Insertion part
72 stator 73 rotor
91 Raw material supply motor 92 Raw material storage
93 Supply blade 94 Supply pipe
101 Stirrer (rotating device) 102 Stirrer
107 Torque measuring unit 120 Container
125 Case member 131 Inner shaft
132U Upper outer shaft 132D Lower outer shaft
133 Outer circumference stirring blade 134 Stirring blade
141 First motor 142 Second motor
171 Torque meter case 172 stator
173 Rotor L Liquid

Claims (10)

A flat plate structure provided horizontally and
A case member provided in the flat plate structure and
A container provided on the case member and
The first rotating body and the second rotating body provided inside the container,
The first motor that rotationally drives the first rotating body and
A second motor that rotationally drives the second rotating body, and
A control device that controls the rotation speed of the first rotating body by the first motor and the rotation speed of the second rotating body by the second motor.
A torque meter for measuring the rotational torque of the first motor is provided.
A rotating device that rotates an object charged in the container with the first rotating body and the second rotating body.
The control device is a rotary device that performs feedback control so that the value of the rotary torque measured by the torque meter is within a predetermined range. The container includes a cylindrical screen provided on the upper side of the case member and a cylindrical hopper provided on the upper side of the screen.
The first rotating body is an extrusion blade provided inside the screen.
The second rotating body is a pressure vane provided inside the hopper.
The rotary device according to claim 1, wherein the kneaded product charged into the hopper is granulated by pressing the kneaded product into the screen with the extrusion blades while pressing the kneaded product downward with the pressure blades. In the control device, the rotational speed of the extrusion blade by the first motor and / or the addition by the second motor so that the value of the rotational torque measured by the torque meter is within a predetermined range. The rotating device according to claim 2, wherein the rotating speed of the pressure blade is adjusted. A supply device for feeding the kneaded material into the hopper is provided.
The input speed of the kneaded product by the supply device is controlled by the control device, and is controlled by the control device.
In the control device, the rotation speed of the extrusion blade by the first motor and the rotation of the pressurizing blade by the second motor so that the value of the rotation torque measured by the torque meter is within a predetermined range. The rotating device according to claim 2, wherein at least one of the speed and the charging speed of the kneaded product by the supply device is adjusted. The first rotating body is an outer peripheral stirring blade that rotates near the inner peripheral surface of the container.
The second rotating body is a stirring blade that rotates at the center of the container.
The rotary device according to claim 1, wherein the stirring blade agitates the liquid in the central portion of the container, and the outer peripheral stirring blade agitates the liquid in the vicinity of the inner peripheral surface of the container. A flat plate structure provided horizontally and
A case member provided in the flat plate structure and
A container provided on the case member and
The first rotating body and the second rotating body provided inside the container,
The first motor that rotationally drives the first rotating body and
A second motor that rotationally drives the second rotating body, and
A torque meter for measuring the rotational torque of the first motor is provided.
A method for controlling a rotating device, in which an object charged in the container is rotated by the first rotating body and the second rotating body.
A control method for a rotating device that performs feedback control so that the value of rotational torque measured by the torque meter is within a predetermined range. The container includes a cylindrical screen provided on the upper side of the case member and a cylindrical hopper provided on the upper side of the screen.
The first rotating body is an extrusion blade provided inside the screen.
The second rotating body is a pressure vane provided inside the hopper.
The control method for a rotating device according to claim 6, wherein the kneaded product charged into the hopper is granulated by pressing the kneaded product downward with the pressure blades and pressing the kneaded product against the screen with the extrusion blades. The rotational speed of the extrusion blades by the first motor and / or the rotational speed of the pressurizing blades by the second motor so that the value of the rotational torque measured by the torque meter is within a predetermined range. 7. The method for controlling a rotating device according to claim 7. A supply device for feeding the kneaded material into the hopper is provided.
In the control device, the rotation speed of the extrusion blade by the first motor and the rotation of the pressurizing blade by the second motor so that the value of the rotation torque measured by the torque meter is within a predetermined range. The method for controlling a rotating device according to claim 7, wherein at least one of the speed and the charging speed of the kneaded product by the supply device is adjusted. The first rotating body is an outer peripheral stirring blade that rotates near the inner peripheral surface of the container.
The second rotating body is a stirring blade that rotates at the center of the container.
The control method for a rotating device according to claim 6, wherein the stirring blade agitates the liquid in the central portion of the container, and the outer peripheral stirring blade agitates the liquid in the vicinity of the inner peripheral surface of the container.

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