JP2021178261A - Motor built-in type flour milling roll machine - Google Patents

Abstract

To provide a flour milling roll machine which prevents a motor from projecting from shaft ends of each cylindrical roll and can reduce the size of a whole structure.SOLUTION: A flour milling roll machine 1 has at least a pair of rolls 4 and 5, drives each of the pair of rolls 4 and 5 at different peripheral velocities and crushes grains, and splits down the grains. Each of the pair of rolls 4 and 5 includes: the cylindrical rolls 4 and 5 which forms hollow parts; a rotor B of a motor which is fixed to an inner peripheral surface of the hollow part; a spindle 34 which rotatably supports the cylindrical rolls 4 and 5 and penetrates through the hollow part and is fixed; and a stator A of the motor which is fixed to the spindle 34 and faces the rotor.SELECTED DRAWING: Figure 3

Description

The present invention relates to a roll machine for milling with a built-in motor.

Mills that grind grains such as wheat are equipped with a large number of milling roll machines that grind and grind grains. The mainstream of milling roll machines is one in which one frame is partitioned at the center by a partition plate or the like, and two pairs of rolls are provided symmetrically.

As shown in Patent Document 1, the pair of rolls of the milling roll machine includes a low-speed rotating low-speed roll movably supported by a moving bearing, a high-speed rotating high-speed roll supported by a fixed bearing, and a low-speed rolling roll. Is equipped with a roll clearance adjusting device that operates to move toward and away from the high-speed roll. The rotary drive of the low-speed roll and the high-speed roll is a mechanism of being rotated by one drive source (motor). That is, the motor and the high-speed roll communicate with each other via a drive transmission means such as a V-belt so that the high-speed roll rotates at high speed. On the other hand, the low-speed roll winds a timing belt, which is a differential transmission mechanism, between the low-speed roll and the high-speed roll so that the low-speed roll rotates at a lower speed than the high-speed roll, and a rotational difference speed is generated. It is formed like this.

Further, Patent Document 2 discloses a technique in which a motor is directly connected to each of a pair of rolls of a milling roll machine. That is, in a cylindrical roll in which at least a pair of flour milling roll machines are arranged side by side in parallel, each cylindrical roll has a torque motor directly installed at the shaft end thereof and the rotation speed of each of the pair of rolls. It is characterized by being equipped with at least one control device for appropriately controlling and monitoring the rotation parameter).

There is a description of the effect that this configuration can eliminate or reduce the drive mechanism between the motor and the cylindrical roll.

However, in Patent Document 1, there are problems that belts such as V-belts and timing belts, various pulleys, and accessories such as a belt tension mechanism are required, and noise is generated by the power transmission means. .. In order to solve this, in Patent Document 2, the motor is directly installed and directly connected to the shaft end of each cylindrical roll, but since the motor protrudes from the shaft end of each cylindrical roll, the volume is large. There was a problem that it was bulky and the overall structure of the flour milling roll machine became large.

Japanese Patent Application Laid-Open No. 2003-24810 International Publication No. 2017/089870

In view of the above problems, it is a technical problem to provide a milling roll machine capable of miniaturizing the entire structure without the motor protruding from the shaft end of each cylindrical roll.

In order to solve the above problems, the present invention is a milling roll machine having at least a pair of rolls, and rotating and driving each of the pair of rolls at different peripheral speeds to grind and grind grains. ,
Each of the pair of rolls rotatably supports the cylindrical roll forming the hollow portion, the rotor of the motor fixed to the inner peripheral surface of the hollow portion, and the tubular roll. , A fixed spindle that penetrates the hollow portion and a stator of a motor that is fixed to the spindle and faces the rotor are provided.

According to the second aspect of the present invention, a high-speed power supply unit is connected to the high-speed roll so that each of the pair of rolls can be rotationally driven at different peripheral speeds, while the low-speed roll is connected to the low-speed roll. It is characterized in that a power supply unit for use is connected.

According to the third aspect of the present invention, the length of the pair of rolls in the axial direction is 1000 mm to 1500 mm, each roll has a hollow portion, and a stator core is inserted through the hollow portion. While fixing the shaft end portion, a plurality of slots are provided at equal intervals in the axial direction on the outer peripheral portion of the stator core, and armature windings are provided in each of these slots.

According to the fourth aspect of the present invention, the plurality of armature windings are connected to the power supply unit in series so that a large torque is generated at a low speed when the roll is rotationally driven and the rotation speed is increased when the load is reduced. It is characterized by.

The invention according to claim 5 is characterized in that the plurality of armature windings are connected to a power supply unit in parallel so that the rotation speed does not change even if a load is applied when the roll is rotationally driven. ..

According to the present invention, a milling roll machine having at least a pair of rolls and driving each of the pair of rolls at different peripheral speeds to grind and grind grains, the pair of rolls. Each of the tubular rolls forming the hollow portion, the rotor of the motor fixed to the inner peripheral surface of the hollow portion, and the tubular roll rotatably supporting the hollow portion, and the hollow portion. Since it is provided with a fixed spindle that penetrates the spindle and a stator of a motor that is fixed to the spindle and faces the rotor, power transmission of a belt, various pulleys, a belt tension mechanism, or the like is provided. Means are not required, and the problem of noise generation can be solved. Further, since the motor is not provided so as to project from the shaft end of the roll, the entire structure can be miniaturized. Then, there is no risk that the operator will come into contact with the motor or the like, and the safety will be achieved.

It is sectional drawing of the double type milling roll machine of this invention. It is the front view of the same as above. It is a partially broken front view of a roll machine for milling which shows how each roll is supported by a bearing. It is a schematic diagram which shows how a pair of rolls is supported by a bearing. It is a block diagram which shows the control composition of the roll machine for milling for controlling a motor etc. based on the information from various sensors.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of a double-type milling roll machine, and FIG. 2 is a front view of the same. The schematic configuration of the milling roll machine will be described based on these figures. Reference numeral 1 is a milling roll machine, in which the frame 2 is partitioned at the center by a partition plate 3 or the like, and is provided symmetrically as a pair of rolls 4 and 5 and a pair of rolls 6 and 7, respectively. The pair of rolls 4 and 5 and the pair of rolls 6 and 7 are rotatably arranged in the frame 2.

Then, the rolls 4 and 6 near the partition plate 3 of the frame 2 are supported on the moving bearing 8 (see FIG. 4) so that the roll gap can be adjusted by moving closer to or away from the rolls 5 and 7 on the fixed side. The rolls 5 and 7 closer to the frame 2 side are supported by the fixed bearing 9 (see FIG. 4) so that they cannot move. The rolls 4 and 6 on the moving bearing 8 side may be formed on the low speed roll, and the rolls 5 and 7 on the fixed bearing 9 side may be formed on the high speed roll. Further, if a roll gap adjusting device 10 (see FIG. 4) is provided between the pair of rolls 4 and 5 and between the pair of rolls 6 and 7, the roll gap is manually finely reduced by the rotation of the handle 11. Can be adjusted. Not limited to this, the roll gap may be automatically adjusted by an actuator such as a gear motor.

The crushing chamber 13 (see FIG. 1) surrounded by the covers 12 below the rolls 4 and 5 has an outflow hopper 14 at the lower part thereof, and a transportation pipe 15 for transporting the crushed stock in the outflow hopper 14. I'm facing you. Further, in the grinding chamber 13, scrapers 16 for scraping off the stock adhering to the pair of rolls 4 and 5 are provided. The scraper 16 is in contact with the surfaces of the rolls 4 and 5 by the support 17. When the pair of rolls 6 and 7 are sharpening rolls, a brush 18 is provided instead of the scraper. The brush 18 is brought into contact with the surfaces of the rolls 6 and 7 by the support 19.

A front door 20 is provided on the inclined upper side of the rolls 4 and 5, and a stock supply means 21 is provided between the front door 20 and the partition plate 3. The stock supply means 21 includes a stock supply chamber 23 formed by the stock supply cylinder 22, a supply hopper 24 in contact with the stock supply chamber 23, and front and rear provided for supplying stock to a crushing roll in a thin layer. A pair of feed rolls 25, 26, a feeder gate plate 27 on the front feed roll 25, a guide plate 28 provided on the side of the supply hopper 24, and a front feed roll among the pair of feed rolls 25, 26. It is composed of a guide chute 29 for flowing the thin layer stock discharged from 25 onto the main rolls 4 and 5 for crushing. At the top of the stock supply cylinder 22, a pneumatic pipe 30 for transporting the ground stock of the milling roll machine 1 to the next process is arranged.

FIG. 3 is a partially broken front view of a milling roll machine showing how each roll is supported by a bearing, and FIG. 4 is a schematic view showing how a pair of rolls are supported by a bearing. As shown in FIGS. 3 and 4, the fixed side rolls 5 and 7 have both shaft ends fixed to the pair of left and right fixed bearings 9, and the moving side rolls 4 and 6 have both shafts attached to the left and right pair of moving bearings 8. The ends are fixed. As shown in FIG. 3, the fixed bearing 9 and the moving bearing 8 are supported by the support bases 31, 32 and the like, respectively.
Each of the rolls 4, 5, 6 and 7 has a hollow portion. A stator core 34 ... Is inserted into the hollow portion of each roll 4, 5, 6, 7 via a bearing 33. Both shaft ends of the stator core 34 ... Are fixed.

The stator core 34 ... Is provided with a plurality of axial slots at equal intervals on the outer peripheral portion thereof, and armature windings 35 ... Are provided in each of these slots. These armature windings 35 ... constitute the stator A of the synchronous motor. Since the long rolls 4, 5, 6, and 7 having a length of about 1000 mm to 1500 mm are used for the milling roll machine 1 of the present embodiment, the armature windings 35 are equidistantly spaced in the entire axial region. It is better to provide ...

Further, a hollow hole is formed in the stator core 34 ..., and the electric cable 36 is inserted into the hollow hole of the stator core 34 ... through the shaft portion on one end side of the stator core 32 ... It is electrically connected. The electrical connection between the electric cable 36 and the plurality of armature windings 35 ... may be connected in series as shown in FIGS. 3 and 4, or a plurality of electric cables 36 ... Are provided for each electric connection. It may be connected in parallel with the child winding 35 ...

By connecting the plurality of armature windings 35 ... Of FIGS. 3 and 4 in series, there is an advantage that a large torque is generated at a low speed and the rotation speed becomes high when the load is lowered. Such a design is recommended in situations where high voltage can be supplied. On the other hand, by connecting a plurality of armature windings 35 ... In parallel, there is an advantage that the rotation speed does not change so much even if a load is applied. Such a design is recommended in situations where a large current can be supplied.

On the other hand, the rolls 4, 5, 6 and 7 are made of a magnetic material such as cast iron, and hold a large number of permanent magnets 37 ... In the axial direction on the inner peripheral surface side thereof so as to generate a field magnet. Let me. Then, both ends of the rolls 4, 5, 6, and 7 are rotatably supported by bearings 33 ... To form the rotor B as a synchronous motor.

FIG. 5 is a block diagram showing a control configuration of a milling roll machine for controlling a motor or the like based on information from various sensors.

As a control configuration (see FIG. 5), an operation unit / display unit 40 that can be operated by directly touching the liquid crystal screen, a stock level sensor 41, a feed roll rotation sensor 42, and a motor load current sensor (high-speed side roll). ) 43 and the motor load current sensor (low speed side roll) 44 are the main input units, and are electrically connected to the central arithmetic control device 50, respectively.
On the other hand, the output unit includes a roll gap adjusting motor 45 that automatically adjusts the gap between rolls 4, 5 or rolls 6, 7, a feed roll motor 46, a power supply unit (high-speed side roll) 47, and power supply. The unit (low speed side roll) 48 and the unit (low speed side roll) 48 are electrically connected to the central arithmetic control device 50, respectively. A high-speed power supply unit 47 is connected to the high-speed side rolls 5 and 7 so that each of the pair of rolls 4 and 5 and the pair of rolls 6 and 7 can be rotationally driven at different peripheral speeds. On the other hand, a low-speed power supply unit 48 is connected to the low-speed rolls 4 and 6 (see FIG. 4).

Hereinafter, the operation in the above configuration will be described with reference to the drawings.

When the operator (operator) operates the operation unit / display unit 40 to drive the flour milling roll machine 1, the stock level sensor 41, the feed roll rotation sensor 42, the motor load current sensor (high-speed roll) 43, and the motor load current Check whether various sensors such as the sensor (low speed side roll) 44 are abnormal.

The central arithmetic control device 50 determines whether or not grinding / splitting is possible, and issues a command to each drive unit. That is, predetermined power is supplied to the roll gap adjusting motor 45, the feed roll motor 46, the power supply unit (high-speed side roll) 47, and the power supply unit (low-speed side roll) 48.

The object to be crushed into the stock supply cylinder 22 is sent to the feed rolls 25 and 26 rotating at an appropriate rotation speed via the stock supply chamber 23 and the supply hopper 24, and is appropriate from the feed rolls 25 and 26. It is sent to the pair of rolls 4 and 5 and the pair of rolls 6 and 7 so that the object to be crushed is supplied with a thick layer thickness.

At this time, power is supplied from the power supply unit (high-speed side roll) 47 to the high-speed side rolls 5 and 7 so as to rotate at high speed, while the power supply unit (low-speed side roll) is supplied to the low-speed side rolls 4 and 6. ) 48, the power is supplied so as to rotate at a low speed. The rotation mechanism of the rolls 4, 5, 6 and 7 will be described. When power is supplied from the power supply units 47, 48 to the armature winding 35 ... wound around the stator core 34 ... via the electric cable 36, the rolls 4, 5, 6, 7 become permanent magnets 37 ... It comes to be driven as a synchronous motor of an outer rotor structure that rotates by receiving a rotational force by the action with the field generated by the above. Therefore, the pair of rolls 4, 5 and 6, 7 are rotated with different speed differences, and are crushed so as to be crushed by the object to be crushed by a shearing force.

After that, the crushed material that has become crushed material is collected by the pneumatic pipe 30 via the transport pipe 15. At this time, in the motor-built-in type milling roll machine 1 having the above configuration, the rolls 4, 5, 6 and 7 form a magnetic circuit, and the magnetic field generated between the rolls 4, 5, 6 and 7 and the stator core 34 ... Therefore, the output and efficiency of the motor can be increased. Further, when a superconducting wire is used as the armature winding 35 ..., for example, there is no electric resistance, heat generation can be suppressed to a very small amount, and the current density is high, so that a high output can be generated as a motor. Further, if the stator is housed in a heat insulating container, the stator can be cooled without being affected by the heat generated on the rotor side, and the armature winding 35 ... Can be efficiently kept at a low temperature. can.

As described above, according to the present embodiment, there is at least a pair of rolls 4 and 5, and each of the pair of rolls 4 and 5 is rotationally driven at different peripheral speeds to grind the grains and grind them. In the flour milling roll machine 1, each of the pair of rolls 4 and 5 is a tubular roll 4 and 5 having a hollow portion formed therein, and a rotor B of a motor fixed to the inner peripheral surface of the hollow portion. And the fixed spindle 34 that rotatably supports the tubular rolls 4 and 5 and penetrates the hollow portion, and the motor fixed to the spindle 34 and facing the rotor. Since the stator A is provided, a belt, various pulleys, a power transmission means such as a belt tension mechanism, and the like are not required, and the problem of noise generation can be solved. Further, since the motor is not provided so as to project from the shaft end of the roll, the entire structure can be miniaturized. Then, there is no risk that the operator will come into contact with the motor or the like, and the safety will be achieved.

The present invention can be applied to a milling roll machine. In addition, it can also be applied to a rubber roll type huller that slides off rice husks due to the difference in the speed at which the rolls rotate. At that time, instead of the rubber roll, it is advisable to electrodeposit the surface layer of cast iron with carbide abrasive grains such as cBN to form a special huller roll, and the roll itself is made of a magnetic material.

1 Milling roll machine 2 Frame 3 Partition plate 4 Roll (moving side)
5 rolls (fixed side)
6 rolls (moving side)
7 rolls (fixed side)
8 Moving bearing 9 Fixed bearing 10 Roll gap adjusting device 11 Handle 12 Cover 13 Grinding chamber 14 Outflow hopper 15 Transport pipe 16 Scraper 17 Support 18 Brush 19 Support 20 Front door 21 Stock supply means 22 Stock supply cylinder 23 Stock supply Room 24 Supply hopper 25 Feed roll 26 Feed roll 27 Feeder gate plate 28 Guide plate 29 Guide chute 30 Pneumatic piping 31 Support base 32 Support base 33 Bearing 34 Stator core 35 Armature winding 36 Electric cable 37 Permanent magnet 40 Operation unit Display 41 Stock level sensor 42 Feed roll rotation sensor 43 Motor load current sensor (high-speed roll)
44 Motor load current sensor (low speed roll)
45 Roll gap adjustment motor 46 Feed roll motor 47 Power supply unit (high-speed roll)
48 Power supply unit (low speed roll)
50 Central arithmetic controller

Claims (5)

A milling roll machine having at least a pair of rolls and rotating each of the pair of rolls at different peripheral speeds to grind and grind grains.
Each of the pair of rolls rotatably supports the tubular roll forming the hollow portion, the rotor of the motor fixed to the inner peripheral surface of the hollow portion, and the tubular roll. A motor-built-in type milling roll machine comprising a fixed spindle that penetrates the hollow portion and a stator of a motor that is fixed to the spindle and faces the rotor. Each of the pair of rolls is connected to a high-speed power supply unit to the high-speed roll so that it can be rotationally driven at different peripheral speeds, while a low-speed power supply unit is connected to the low-speed roll. The roll machine for milling with a built-in motor according to claim 1. The length of the pair of rolls in the axial direction is 1000 mm to 1500 mm, each roll has a hollow portion, and a stator core is inserted into the hollow portion to fix both shaft ends thereof. The roll machine for milling with a built-in motor according to claim 1 or 2, wherein a plurality of slots are provided at equal intervals in the axial direction on the outer peripheral portion of the stator core, and armature windings are provided in each of these slots. The motor according to claim 3, wherein the plurality of armature windings generate a large torque at a low speed when the roll is rotationally driven, and are connected to a power supply unit in series so that the rotation speed increases when the load decreases. Built-in flour milling roll machine. The motor built-in type milling according to claim 3, wherein the plurality of armature windings are connected to a power supply unit in parallel so that the rotation speed does not change even if a load is applied when the roll is rotationally driven. Roll machine.

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