WO2018123697A1 - Broyeur vertical - Google Patents

Broyeur vertical Download PDF

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Publication number
WO2018123697A1
WO2018123697A1 PCT/JP2017/045393 JP2017045393W WO2018123697A1 WO 2018123697 A1 WO2018123697 A1 WO 2018123697A1 JP 2017045393 W JP2017045393 W JP 2017045393W WO 2018123697 A1 WO2018123697 A1 WO 2018123697A1
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WO
WIPO (PCT)
Prior art keywords
roller
rotary table
support member
contact
gap
Prior art date
Application number
PCT/JP2017/045393
Other languages
English (en)
Japanese (ja)
Inventor
武士 佐藤
高浪　裕智
規史 石橋
Original Assignee
株式会社アーステクニカ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社アーステクニカ filed Critical 株式会社アーステクニカ
Publication of WO2018123697A1 publication Critical patent/WO2018123697A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/08—Mills with balls or rollers centrifugally forced against the inner surface of a ring, the balls or rollers of which are driven by a centrally arranged member

Definitions

  • the present invention relates to a vertical mill that pulverizes an object to be crushed such as coal between a rotary table and a roller.
  • a vertical mill 51 that sandwiches and pulverizes an object to be crushed such as coal generally has a casing 52 and a rotary table that rotates in a horizontal plane by laminating the object to be crushed inside the casing 52. 53, a pressurizing mechanism 55 using a hydraulic cylinder or the like, and a roller 54 swingably disposed around the support shaft 56 at the tip of the roller support member 59.
  • the object to be crushed stacked on 53 is pulverized by pressing the roller 54 against the surface of the rotary table 53 (for example, Patent Document 1).
  • the pressure mechanism 55 swings the roller 54 downward so that the gap between the rotary table 53 and the roller 54 does not approach a preset minimum gap or less.
  • a stopper 57 for limiting is provided. For example, when the adjustment bolt 58 moves back and forth, the stopper 57 is positioned at a position corresponding to the minimum gap, and the lower contact portion 60 of the roller support member 59 is the tip of the stopper 57.
  • the roller 54 is configured to limit the downward swing of the roller 54.
  • the predetermined interval is maintained in accordance with the amount of wear. Therefore, it is necessary to readjust the position of the adjusting bolt 58.
  • the readjustment of the position of the adjusting bolt 58 is conventionally performed by opening the inside of the casing 52 of the vertical mill 51 and placing the object to be crushed on the rotary table 53 with a spacer or measuring instrument.
  • the adjustment bolt 58 must be operated and adjusted while measuring the gap between the rotary table 53 and the roller 54. For this reason, the work is complicated, and it is necessary to stop the operation of the vertical mill 51 for a long period of time for cooling in the machine, opening to the atmosphere, recovery for restarting operation, and the like, and the operating rate is lowered. was there.
  • the present invention was made to solve the above-described problems of the prior art, and does not require cooling work in the casing, release to the atmosphere, and recovery work for resuming operation. It is an object of the present invention to provide a vertical mill that can easily optimize a gap between a rotary table and a roller for manufacturing.
  • a first aspect of the present invention includes a casing, a rotary table disposed in the casing, a roller disposed above the rotary table, the roller, and the rotary table.
  • the gap adjusting device includes a hydraulic cylinder for driving the roller up and down, and the hydraulic cylinder is operated to lower the roller. Based on a change in the hydraulic pressure of the hydraulic cylinder, it is configured to detect that the roller is in contact with the rotary table.
  • the gap adjusting device has a roller support member for swingably supporting the roller, and when the roller is lowered. Based on a change in the swing angle of the roller support member, it is configured to detect that the roller is in contact with the rotary table.
  • the gap adjustment device includes a current acquisition unit for acquiring a drive current of an electric motor that drives the rotary table, Based on a change in driving current of the electric motor when the roller is lowered, it is configured to detect that the roller is in contact with the rotary table.
  • load acquisition means for acquiring a load acting on the rotary table is provided in the rotary table, and the roller is lowered. It is configured to detect that the roller is in contact with the rotary table based on a change in the load acquired by the load acquisition means.
  • the gap adjusting device restricts the roller from approaching the rotary table beyond a predetermined minimum gap.
  • the gap adjusting device has a roller support member for swingably supporting the roller, and the minimum gap limiting means is the roller support member. And a servo motor for driving the pressure receiving portion forward and backward, and driving the servo motor in a state where the pressure receiving portion is in contact with the roller support member. Based on a change in drive current of the servo motor when the pressure receiving portion is moved backward to lower the roller, it is configured to detect that the roller is in contact with the rotary table. And
  • the eighth aspect includes a cylinder having a piston rod whose tip is connected to or abuts on the roller support member, and the roller support member is pressed by the piston rod. It is comprised so that a roller may be pressed toward the said rotary table, It is characterized by the above-mentioned.
  • the rotary table is rotated in a state where the roller is in contact with the rotary table to detect a road surface state of the rotary table. It is characterized by comprising a detecting means for the purpose.
  • a tenth aspect of the present invention is characterized in that, in the ninth aspect, the detection means is configured to detect a position where the roller is most raised when the rotary table is rotated. To do.
  • the detection means has a swing angle of a roller support member for swingably supporting the roller or a tip portion of the roller support member.
  • the road surface state of the rotary table is detected based on the amount of movement of the piston rod of the hydraulic cylinder to be connected or abutted.
  • the detection means detects a road surface state of the rotary table based on a drive current of an electric motor that drives the rotary table. It is comprised in that.
  • the gap adjustment device is configured based on a rocking angle of the roller support member for swingably supporting the roller. It is comprised so that the clearance gap between a roller and the said rotary table may be adjusted.
  • a fourteenth aspect of the present invention includes a casing, a rotary table disposed in the casing, a roller disposed above the rotary table, the roller, and the rotary table.
  • a gap adjusting device for adjusting the gap of the rotary table detects the road surface state of the rotary table by rotating the rotary table in a state where the roller is in contact with the rotary table. It has the detection means for, It is characterized by the above-mentioned.
  • a fifteenth aspect of the present invention is characterized in that, in the fourteenth aspect, the detection means is configured to detect a position where the roller is most raised when the rotary table is rotated. To do.
  • the detection means has a swing angle of a roller support member for swingably supporting the roller or a tip end portion of the roller support member.
  • the road surface state of the rotary table is detected based on the amount of movement of the piston rod of the hydraulic cylinder to be connected or abutted.
  • the detection means detects a road surface state of the rotary table based on a drive current of an electric motor that drives the rotary table. It is comprised in that.
  • the gap adjustment device is configured based on a swing angle of the roller support member for swingably supporting the roller. It is comprised so that the clearance gap between a roller and the said rotary table may be adjusted.
  • the vertical mill according to the present invention eliminates the need for cooling work inside the casing, opening to the atmosphere, and restoration work for resuming operation, and the clearance between the rotary table and the roller is produced for the production of high-quality powder products. Easy to optimize.
  • FIG. 2 is a diagram showing a configuration of the gap adjusting device in the first embodiment of the vertical mill according to the present invention.
  • the first embodiment of the vertical mill according to the present invention is the same as that of the vertical mill shown in FIG. 1 unless there is a particular contradiction in the parts other than the gap adjusting device shown in FIG. .
  • the vertical mill of the first embodiment includes a casing 2, a rotary table 3 that is disposed inside the casing 2 and rotates by stacking objects to be crushed, a roller 4 that is disposed above the rotary table 3, a roller 4, and a gap adjusting device 5 for adjusting the gap between the roller 4 and the rotary table 3.
  • the gap adjusting device 5 rotatably holds the hydraulic cylinder 6 and the roller 4 supported by the casing 2 and swings up and down around the support shaft 10 by the hydraulic cylinder 6 to raise and lower the roller 4.
  • a stopper 14 as minimum gap limiting means for limiting the roller 4 and the rotary table 3 from approaching over a predetermined minimum gap.
  • the hydraulic cylinder 6 is a double-acting type, and is configured such that hydraulic fluid is supplied from the hydraulic pump 22 to both sides of the piston in the hydraulic cylinder 6 via the switching valve 23 and the flow rate control valve 29. Accordingly, when hydraulic oil is supplied to the cylinder chamber on the rear side of the piston (the inside of the casing 2 of the hydraulic cylinder 6 is referred to as the front side and the opposite side is referred to as the rear side) via the supply pipe 33, the piston rod 19 is When the hydraulic oil is advanced and supplied to the cylinder chamber on the front side of the piston via the supply pipe 34, the piston rod 19 moves backward. As a result, the piston rod 19 is moved forward and backward by the hydraulic cylinder 6, and the roller support member 7 connected to the tip of the piston rod 19 swings up and down around the support shaft 10, thereby moving the roller 4 up and down. be able to.
  • the oil pressure inside the supply line 33 can be detected by the pressure sensor 24.
  • a detection signal from the pressure sensor 24 is transmitted to the hydraulic control device 20.
  • the forward / reverse speed of the piston rod 19 can be adjusted by controlling the flow rate of the hydraulic oil supplied to the hydraulic cylinder 6 by the flow rate adjusting valve 29.
  • the support shaft 10 is supported by a cover 30 that is detachably connected to the casing 2 by mounting bolts 31.
  • An angle sensor 8 for detecting the swing angle of the roller support member 7 is attached to the support shaft 10.
  • the stopper 14 includes a female screw 15 disposed in a lower portion of the cover 30 and a push bolt 16 that is screwed into the female screw 15. By rotating the push bolt 16, the stopper 14 is provided. , Can move in the axial direction.
  • the push bolt 16 can be fixed by a fixing nut 35.
  • the piston rod 19 is moved forward by the hydraulic cylinder 6 to swing the roller support member 7 downward, and the contact portion 18 disposed at the lower portion of the roller support member 7 is disposed at the tip of the push bolt 16.
  • the push bolt 16 is moved forward and backward by rotating the push bolt 16 to position the pressure receiving portion 17 at a position corresponding to the minimum gap.
  • the minimum gap is used to ensure the quality of the pulverized product such as the particle size when the pulverized product is pulverized to produce the pulverized product. Is selected as an appropriate gap between the roller 4 and the rotary table 3.
  • the push bolt 16 is moved backward and the roller 4 is lowered, and the pressure receiving portion 17 of the push bolt 16 is moved to the roller.
  • the gap between the roller 4 and the rotary table 3 in a state in which the abutting portion 18 of the support member 7 abuts is set to a predetermined minimum gap according to the properties of the minimum gap to-be-ground material and the required quality of the powder product.
  • the roller 4 is connected to the rotary table 3 in a state where the inside of the casing 2 is isolated from the outside air without opening the inspection port. The contact is detected, and the minimum gap between the roller 4 and the rotary table 3 is set based on the detected position where the roller 4 and the rotary table 3 are in contact.
  • the distance between the roller 4 and the turntable 3 after the roller 4 or the like is worn by performing the operation of the vertical mill such as a method of setting the distance between the roller 4 and the turntable 3 to the minimum gap.
  • a method for setting the minimum gap to the minimum gap will be described.
  • the push bolt 16 is moved backward to a position where the roller 4 can come into contact with the rotary table 3 (the minimum clearance restriction is released), and the switching valve 23 is operated to supply hydraulic oil to the cylinder chamber on the rear side of the piston.
  • the gate valve (gate valve) 32 is normally closed. Thereby, the piston rod 19 moves forward, and the roller 4 is lowered toward the rotary table 3 by the swinging of the roller support member 7.
  • the roller support member 7 does not further swing downward, so that, for example, the forward movement of the piston rod 15 takes into account the pulsation of the pressure system of the hydraulic cylinder.
  • a predetermined threshold value for example, 5% to 10%
  • the pressure P signal measured by the pressure sensor 24 is transmitted to the signal processing unit 26 in the control device 28 of the gap adjusting device 5 to monitor and judge an increase in the predetermined threshold with respect to the pressure P0.
  • the swing angle input from the angle sensor 8 at the time when the roller 4 is raised is acquired as the swing angle when the roller 4 comes into contact with the rotary table 3 through the swing angle acquisition unit 27 and is stored in the storage unit 25. To remember.
  • the storage unit 25 stores the relationship between the gap between the roller 4 and the rotary table 3 with respect to the swing angle of the roller support member 7 with respect to the contact point between the roller 4 and the rotary table 3, and the front and rear of the piston rod 19 of the hydraulic cylinder 6.
  • the relationship between the advance amount and the swing angle of the roller support member 7 is stored in the form of a table or a function, and a roller for setting a minimum gap by the signal processing unit 26 based on the stored data.
  • a swing angle at which the support member 7 should be swung upward is calculated, and a backward travel distance of the piston rod 19 to be swung by the calculated swing angle is calculated.
  • the storage unit 25 includes a relationship between a gap between the roller 4 and the rotary table 3 with respect to a swing angle of the roller support member 7 with respect to a contact point between the roller 4 and the rotary table 3, and a piston rod of the hydraulic cylinder 6.
  • the hydraulic cylinder 6 against the gap between the roller 4 and the rotary table 3 with respect to the contact point of the rotary table 3 is used.
  • the relationship of the forward / backward travel amount of the piston rod 19 may be stored, and the backward travel distance of the piston rod 19 may be calculated by the signal processing unit 26 to set the minimum clearance based on the stored data. .
  • the hydraulic control system of the hydraulic cylinder 6 is a servo control system for the position.
  • the push bolt 16 is moved forward to bring the pressure receiving portion 17 at the tip into contact with the contact portion 18 of the roller support member 7, and then fixed with a fixing nut 35 so that the push bolt 16 does not move forward and backward.
  • the contact of the roller 4 with the rotary table 3 is detected by a predetermined pressure increase of the hydraulic oil, and at the same time the operation to the hydraulic cylinder 6 is performed. Stop supplying oil.
  • the gap between the roller 4 and the rotary table 3 is adjusted based on the swing angle of the roller support member 7 measured by the angle sensor 8, but instead of the angle sensor 8,
  • a linear scale distance sensor
  • the amount of movement of the piston rod 19 of the hydraulic cylinder 5 is used to determine the piston based on the position information of the piston rod 19 when the contact between the roller 4 and the rotary table 3 is detected.
  • gap adjustment, minimum gap limit setting, etc. may be performed. The same applies to modified examples and other embodiments described below.
  • the minimum gap can be set in a state where the inside of the casing 2 is isolated from the outside air without removing the cover 14, the inside of the casing 2 is cooled, released into the atmosphere, and restored for restarting operation. Therefore, it is possible to easily secure a gap between the predetermined rotary table 3 and the roller 4 to manufacture a high-quality powder product.
  • the rocking angle of the roller support member 7 or the position of the piston rod 19 when the roller 4 and the rotary table 3 in the initial production state are brought into contact with each other is measured and recorded, and after a predetermined operation.
  • the swing angle of the roller support member 7 or the position of the piston rod 19 when the roller 4 and the rotary table 3 are brought into contact with each other is measured, and the swing angle of the roller support member 7 or the position of the piston rod 19 at the beginning of manufacture is measured.
  • the total amount of wear of the roller 4 and the rotary table 3 can be obtained by the signal processing unit 26 according to the relationship stored in the storage unit 25, and the inside of the casing 2 can be cooled, opened to the atmosphere, and restarted. Therefore, it is possible to estimate the replacement life or the like of the roller 4 or the rotary table 3 without the need for recovery or the like.
  • Modification 1 As a modification of the method of (re) setting the minimum gap in the first embodiment (hereinafter referred to as “basic example of the first embodiment”), a method described below (hereinafter referred to as “first implementation”). The minimum gap can also be (re-) set also by “Modification 1 of the embodiment”. Note that matters not specifically described below are the same as those in the basic example of the first embodiment unless there is a contradiction or the like.
  • the push bolt 16 is moved backward to a position where the roller 4 can come into contact with the rotary table 3 (release of the minimum clearance restriction), and the switch valve 23 is operated to operate.
  • the hydraulic oil is supplied to the cylinder chamber on the rear side of the piston to advance the piston rod 19, and the roller 4 is lowered toward the rotary table 3 by the swinging of the roller support member 7.
  • the output signal of the angle sensor 8 can be monitored, and the contact of the roller 4 with the rotary table 3 can be detected when the change in the swing angle is eliminated.
  • the angle calculated by the swing angle acquisition unit 27 and the signal processing unit 26 by the above method is the swing when the roller 4 comes into contact with the rotary table 3.
  • the angle is determined and stored in the storage unit 25.
  • the storage unit 25 stores the relationship between the gap between the roller 4 and the rotary table 3 with respect to the swing angle of the roller support member 7 with respect to the contact point between the roller 4 and the rotary table 3, and the movement of the piston rod 19 of the hydraulic cylinder 6.
  • the relationship between the amount and the swing angle of the roller support member 7 is stored in the form of a table or a function, and the roller support is used to set the minimum gap by the signal processing unit 26 based on the stored data.
  • a swing angle at which the member 7 is to be swung upward is calculated, and a backward travel distance of the piston rod 19 to be swung by the calculated swing angle is calculated.
  • the signal processing unit 26 instructs the hydraulic control device 20 to move the piston rod 19 backward by the distance calculated as described above, the piston rod 19 moves backward, and the roller 4 moves to the minimum clearance with respect to the rotary table 3. Ascend to a distant position and stop.
  • the push bolt 16 is moved forward to bring the pressure receiving portion 17 at the tip into contact with the contact portion 18 of the roller support member 7, and then fixed with a fixing nut 35 so that the push bolt 16 does not move forward and backward.
  • the minimum gap can be (re) set also by a method described below (hereinafter referred to as “variation 2 of the first embodiment”). Note that matters not specifically described below are the same as those in the basic example of the first embodiment unless there is a contradiction or the like.
  • the angle calculated by the swing angle acquisition unit 27 and the signal processing unit 26 by the above method is the swing when the roller 4 comes into contact with the rotary table 3.
  • the angle is determined and stored in the storage unit 25.
  • the storage unit 25 stores the relationship between the gap between the roller 4 and the rotary table 3 with respect to the swing angle of the roller support member 7 with respect to the contact point between the roller 4 and the rotary table 3, and the front and rear of the piston rod 19 of the hydraulic cylinder 6.
  • the relationship between the advance amount and the swing angle of the roller support member 7 is stored in the form of a table or a function, and a roller for setting a minimum gap by the signal processing unit 26 based on the stored data.
  • a swing angle at which the support member 7 should be swung upward is calculated, and a backward travel distance of the piston rod 19 to be swung by the calculated swing angle is calculated.
  • the signal processing unit 26 instructs the hydraulic control device to move the piston rod 19 backward by the distance calculated as described above, and the piston rod 19 moves backward so that the roller 4 is separated from the rotary table 3 by the minimum clearance. Ascend to the position and stop.
  • the push bolt 16 is moved forward to bring the pressure receiving portion 17 at the tip into contact with the contact portion 18 of the roller support member 7, and then fixed with a fixing nut 35 so that the push bolt 16 does not move forward and backward.
  • Modification 3 As a modification of the basic example of the first embodiment, the minimum gap can also be (re) set by a method described below (hereinafter referred to as “modification 3 of the first embodiment”). Note that matters not specifically described below are the same as those in the basic example of the first embodiment unless there is a contradiction or the like.
  • Modification 3 of the first embodiment further includes a motor ammeter (not shown) that measures the motor current of an electric motor (not shown) that drives the rotary table 3 to rotate, and the hydraulic pressure of the hydraulic cylinder 6 in the basic example. It detects that the roller 4 contact
  • the push bolt 16 is moved backward to a position where the roller 4 can come into contact with the rotary table 3 (release of the minimum gap restriction).
  • the roller support member 7 does not further swing downward. Therefore, considering the pulsation of the motor current and the like, for example, the roller 4 is applied to the rotary table 3.
  • a predetermined threshold value for example, 5% to 10%
  • the angle calculated by the swing angle acquisition unit 27 and the signal processing unit 26 by the above method is the swing when the roller 4 comes into contact with the rotary table 3.
  • the angle is determined and stored in the storage unit 25.
  • the storage unit 25 stores the relationship between the gap between the roller 4 and the rotary table 3 with respect to the swing angle of the roller support member 7 with respect to the contact point between the roller 4 and the rotary table 3, and the front and rear of the piston rod 19 of the hydraulic cylinder 6.
  • the relationship between the advance amount and the swing angle of the roller support member 7 is stored in the form of a table or a function, and a roller for setting a minimum gap by the signal processing unit 26 based on the stored data.
  • a swing angle at which the support member 7 should be swung upward is calculated, and a backward travel distance of the piston rod 19 to be swung by the calculated swing angle is calculated.
  • the signal processing unit 26 instructs the hydraulic control device so that the piston rod 19 moves backward by the distance calculated as described above, and the piston rod 19 moves backward so that the roller 4 moves away from the rotary table 3 by the minimum gap. Ascend to the position and stop.
  • the push bolt 16 is moved forward to bring the pressure receiving portion 17 at the tip into contact with the contact portion 18 of the roller support member 7, and then fixed with a fixing nut 35 so that the push bolt 16 does not move forward and backward.
  • the roller 4 When the roller 4 is lowered and brought into contact with the rotary table 3, the roller 4 is lowered while rotating the rotary table 3 in advance, and a change in current value at the time of contact can be detected.
  • the lowering operation of the roller 4 is performed in stages, and the rotary table 3 is rotated after each lowering operation to detect a change in the current value between the non-contact state and the contact state. Also good.
  • the pressing force of the turntable by the roller 4 varies accordingly.
  • the motor current of the electric motor that rotationally drives the rotary table 3 fluctuates due to fluctuations in the load torque for rotating the rotary table 3. Therefore, the distribution of the amount of wear in the circumferential direction of the turntable 3 or the distribution of the amount of wear along the outer periphery of the roller 4 can be estimated from the fluctuation state of the motor current.
  • the minimum gap can also be (re) set by a method described below (hereinafter referred to as “variation 4 of the first embodiment”). Note that matters not specifically described below are the same as those in the basic example of the first embodiment unless there is a contradiction or the like.
  • the modification 4 of the first embodiment further includes a vertical / horizontal load sensor (not shown) that measures the vertical / horizontal load acting in the vertical direction or the horizontal direction of the rotary table 3. Instead of changing the hydraulic pressure, it is detected that the roller 4 has come into contact with the rotary table 3 based on the change in vertical / horizontal load measured by the vertical / horizontal load sensor.
  • a strain gauge or a load cell (a strain type, a magnetostriction type, a capacitance type, a gyro type, etc.) can be used, and is attached to the side surface or the back surface of the rotary table 3.
  • the push bolt 16 is moved backward to a position where the roller 4 can come into contact with the rotary table 3 (release of the minimum gap restriction).
  • the switching valve 23 is operated to supply the hydraulic oil to the cylinder chamber on the rear side of the piston to advance the piston rod 19, and the roller 4 moves toward the rotary table 3 by the swinging of the roller support member 7. To lower.
  • the roller support member 7 does not further swing downward.
  • the swing angle measured by the angle sensor when a predetermined threshold value (for example, 5% to 10%) is increased with respect to the vertical / horizontal load measurement value before contact with the rotary table 3 is used. As a result, an accurate swing angle can be acquired.
  • the angle calculated by the swing angle acquisition unit 27 and the signal processing unit 26 by the above method is the swing when the roller 4 comes into contact with the rotary table 3.
  • the angle is determined and stored in the storage unit 25.
  • the storage unit 25 stores the relationship between the gap between the roller 4 and the rotary table 3 with respect to the swing angle of the roller support member 7 with respect to the contact point between the roller 4 and the rotary table 3, and the front and rear of the piston rod 19 of the hydraulic cylinder 6.
  • the relationship between the advance amount and the swing angle of the roller support member 7 is stored in the form of a table or a function, and a roller for setting a minimum gap by the signal processing unit 26 based on the stored data.
  • a swing angle at which the support member 7 should be swung upward is calculated, and a backward travel distance of the piston rod 19 to be swung by the calculated swing angle is calculated.
  • the signal processing unit 26 instructs the hydraulic control device so that the piston rod 19 moves backward by the distance calculated as described above, and the piston rod 19 moves backward so that the roller 4 moves away from the rotary table 3 by the minimum gap. Ascend to the position and stop.
  • the push bolt 16 is moved forward to bring the pressure receiving portion 17 at the tip into contact with the contact portion 18 of the roller support member 7, and then fixed with a fixing nut 35 so that the push bolt 16 does not move forward and backward.
  • FIG. 3 is a diagram showing the configuration of the gap adjusting device in the second embodiment of the vertical mill according to the present invention.
  • the vertical mill of the second embodiment includes a casing 2, a rotary table 3 that is disposed inside the casing 2 and rotates by stacking objects to be crushed, and an upper part of the rotary table 3. And a gap adjusting device 5 that raises and lowers the roller 4 and adjusts the gap between the roller 4 and the rotary table 3.
  • the gap adjusting device 5 rotatably holds the hydraulic cylinder 6 and the roller 4 supported by the casing 2 and swings up and down around the support shaft 10 by the hydraulic cylinder 6 to raise and lower the roller 4.
  • a stopper 14 as minimum gap limiting means for limiting the roller 4 and the rotary table 3 from approaching over a predetermined minimum gap.
  • the configuration, action, and function of the hydraulic cylinder 6 are the same as in the first embodiment.
  • the stopper 14 is positioned while a female screw 15 formed in a lower portion of the cover 30, a push bolt 16 screwed into the female screw 15, and a linear movement of the push bolt 14 by rotating the push bolt 14.
  • a servo motor 21 for The servo motor 21 is controlled by the servo control unit 36.
  • the piston rod 19 is moved forward by the hydraulic cylinder 6 to swing the roller support member 7 downward, and the contact portion 18 disposed at the lower portion of the roller support member 7 is disposed at the distal end portion of the push bolt 16.
  • the lowering of the roller 4 is restricted by contacting the pressure receiving portion 17.
  • the position of the pressure receiving portion 17 is positioned at a position where the gap between the roller 4 and the rotary table 3 becomes the minimum gap by rotating the push bolt 16 by the servo motor 21 and moving the push bolt 16 back and forth.
  • Servo motor 21 has an electromagnetic brake, and after being positioned at a position where the gap between roller 4 and rotary table 3 is the minimum gap, the electromagnetic brake is operated to lock push bolt 16 so as not to move forward and backward.
  • the contact of the roller 4 with the rotary table 3 is detected,
  • the minimum gap between the roller 4 and the rotary table 3 is set on the basis of the detected position where the roller 4 and the rotary table 3 are in contact with each other.
  • the operating current of the servo motor 21 is measured by the ammeter 37, and it can be detected that the roller 4 is in contact with the rotary table 3 by the change (decrease) in the measured operating current.
  • a predetermined threshold value for example, 5% to 10%
  • the information necessary for setting the minimum gap is the swing angle of the roller support member 7 when the roller 4 comes into contact with the rotary table 3.
  • the subsequent swing is performed. Since the angle is constant, the swing angle can be accurately obtained even if there is some error in the measurement of the contact time between the roller 4 and the rotary table 3.
  • the swing angle acquired by the swing angle acquisition unit 27 based on the current value measured (acquired) by the ammeter 37 and the angle signal measured by the angle sensor 8 is transmitted to the signal processing unit 26, and the method described above.
  • the swing angle when the roller 4 comes into contact with the rotary table 3 is obtained and stored in the storage unit 25.
  • the storage unit 25 stores the relationship between the gap between the roller 4 and the rotary table 3 with respect to the swing angle of the roller support member 7 with respect to the contact point between the roller 4 and the rotary table 3, and the front and rear of the piston rod 19 of the hydraulic cylinder 6.
  • the relationship between the advance amount and the swing angle of the roller support member 7 is stored in the form of a table or a function, and a roller for setting a minimum gap by the signal processing unit 26 based on the stored data.
  • a swing angle at which the support member 7 should be swung upward is calculated, and a backward travel distance of the piston rod 19 to be swung by the calculated swing angle is calculated.
  • the hydraulic control system of the hydraulic cylinder 6 is a servo control system for the position.
  • the servo motor 21 is operated to advance the push bolt 16 so that the pressure receiving portion 17 at the tip is brought into contact with the contact portion 18 of the roller support member 7, and then the electromagnetic brake of the electromagnetic servo motor 21 is performed by the servo control unit 36. Is operated to fix the push bolt 16.
  • Modification 1 As a modification of the method of (re) setting the minimized gap in the second embodiment (hereinafter referred to as “basic example of the second embodiment”), a method described below (hereinafter referred to as “second The minimum gap can also be set according to “Modification 1 of the embodiment”. Note that items that are not particularly described below are the same as those in the basic example of the second embodiment unless there is a contradiction or the like.
  • the servo motor 21 is operated to move the push bolt 16 backward, and the contact portion 18 of the roller support member 7 follows the backward movement of the pressure receiving portion 17 of the push bolt 16 and is in contact with the pressure receiving portion 17.
  • the roller support member 7 is swung downward.
  • roller support member 7 swings downward and the roller 4 contacts the rotary table 3, the roller support member 7 stops swinging downward and the contact portion 18 moves the pressure receiving portion 17. Accordingly, the roller support member 7 stops swinging downward even though the push bolt 16 is moving backward.
  • the change of the swing angle of the roller support member 7 is measured by the angle sensor 8, and it is detected that the roller 4 is in contact with the rotary table 3 when the swing angle is constant without changing. Can do.
  • the angle calculated by the swing angle acquisition unit 27 and the signal processing unit 26 by the above method is the swing when the roller 4 comes into contact with the rotary table 3.
  • the angle is determined and stored in the storage unit 25.
  • the storage unit 25 stores the relationship between the gap between the roller 4 and the rotary table 3 with respect to the swing angle of the roller support member 7 with respect to the contact point between the roller 4 and the rotary table 3, and the front and rear of the piston rod 19 of the hydraulic cylinder 6.
  • the relationship between the advance amount and the swing angle of the roller support member 7 is stored in the form of a table or a function, and a roller for setting a minimum gap by the signal processing unit 26 based on the stored data.
  • a swing angle at which the support member 7 should be swung upward is calculated, and a backward travel distance of the piston rod 19 to be swung by the calculated swing angle is calculated.
  • the signal processing unit 26 instructs the hydraulic control device so that the piston rod 19 moves backward by the distance calculated as described above, and the piston rod 19 moves backward so that the roller 4 moves away from the rotary table 3 by the minimum gap. Ascend to the position and stop.
  • the servo motor 21 is operated to advance the push bolt 16 so that the pressure receiving portion 17 at the tip is brought into contact with the contact portion 18 of the roller support member 7, and then the electromagnetic brake of the servo motor 21 is operated to operate the push bolt 16. To fix.
  • Modification 2 As a modification of the basic example of the second embodiment, the minimum gap can also be set by a method described below (hereinafter referred to as “modification 2 of the second embodiment”). Note that items that are not particularly described below are the same as those in the basic example of the second embodiment unless there is a contradiction or the like.
  • the second modification of the second embodiment further includes a motor ammeter (not shown) that measures the motor current of the electric motor that rotates the electric motor (not shown) that drives the rotary table 3, and is the second embodiment.
  • a motor ammeter (not shown) that measures the motor current of the electric motor that rotates the electric motor (not shown) that drives the rotary table 3, and is the second embodiment.
  • the rotary table 3 is rotated and the servo motor 21 is operated to move the push bolt 16 backward, so that the abutting portion 18 of the roller support member 7 follows the backward movement of the pressure receiving portion 17 of the push bolt 16 and receives the pressure receiving portion.
  • the roller support member 7 is swung downward in a state where the roller support member 7 is in contact with the roller 17.
  • the roller support member 7 does not further swing downward, and the swing angle becomes constant. Therefore, considering the pulsation of the motor current, for example, By using the swing angle measured by the angle sensor when a predetermined threshold value (for example, 5% to 10%) increases with respect to the motor current value before the roller 4 contacts the rotary table 3. An accurate swing angle can be automatically acquired.
  • a predetermined threshold value for example, 5% to 10%
  • the angle calculated by the swing angle acquisition unit 27 and the signal processing unit 26 by the above method is the swing when the roller 4 comes into contact with the rotary table 3.
  • the angle is determined and stored in the storage unit 25.
  • the storage unit 25 stores the relationship between the gap between the roller 4 and the rotary table 3 with respect to the swing angle of the roller support member 7 with respect to the contact point between the roller 4 and the rotary table 3, and the front and rear of the piston rod 19 of the hydraulic cylinder 6.
  • the relationship between the advance amount and the swing angle of the roller support member 7 is stored in the form of a table or a function, and a roller for setting a minimum gap by the signal processing unit 26 based on the stored data.
  • a swing angle at which the support member 7 should be swung upward is calculated, and a backward travel distance of the piston rod 19 to be swung by the calculated swing angle is calculated.
  • the signal processing unit 26 instructs the hydraulic control device so that the piston rod 19 moves backward by the distance calculated as described above, and the piston rod 19 moves backward so that the roller 4 moves away from the rotary table 3 by the minimum gap. Ascend to the position and stop.
  • the servo motor 21 is operated to advance the push bolt 16 so that the pressure receiving portion 17 at the tip is brought into contact with the contact portion 18 of the roller support member 7, and then the servo motor 21 is prevented from moving forward and backward.
  • the electromagnetic brake is operated to fix the push bolt 16.
  • the roller support member 7 is connected to the tip of the piston rod 19, but instead of this configuration, the tip of the piston rod 19 is roller-supported. It can also be set as the structure contact
  • the forward / backward movement amount of the servo motor 21 can be calculated from the rotation angle of the servo motor 21 and the screw pitch.
  • roller 4 may be driven up and down by directly driving the roller support shaft with a motor or the like.
  • a straight-shaped push bolt and a hydraulic cylinder can be adopted instead of the screw shape.
  • the pressing force of the turntable by the roller 4 varies accordingly.
  • the motor current of the electric motor that rotationally drives the rotary table 3 fluctuates due to fluctuations in the load torque for rotating the rotary table 3.
  • the distribution of the wear amount in the circumferential direction of the rotary table 3 or the roller from the fluctuation state of the motor current can be estimated.
  • the rotary table 3 With the roller 4 placed on the rotary table 3, the rotary table 3 is rotated by an inching motor or the like, and the position where the roller 4 is most raised is set to the zero point, so that the roller 4 and the rotary table 3 are in contact with each other (metal Setting to the original zero point without touching is possible.
  • the amount of wear of the single rotary table 3 and the roller 4 can also be detected, and the part replacement time can be predicted.
  • the swing angle of the roller support member 7 or the front end portion is connected to the roller support member 7. Or you may make it detect a road surface state based on the moving amount
  • the gap adjusting device 5 detects that the descending roller 4 is in contact with the rotary table 3.
  • the rotary table 3 When the road surface state is detected by rotating the rotary table 3 as described above, it is not always necessary to detect the contact point between the roller 4 and the rotary table 3.
  • the rotary table 3 When the roller is rotated, the position where the roller 4 is most raised can be set to the zero point.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

L'invention concerne un broyeur vertical pourvu d'une table rotative (3) placée à l'intérieur d'un boîtier (2), d'un rouleau (4) placé au-dessus de la table rotative (3), et d'un dispositif de réglage d'espace (5) pour régler l'espace entre le rouleau (4) et la table rotative (3). Le dispositif de réglage d'espace (5) est constitué de manière à détecter un contact entre le rouleau (4) et la table rotative (3) et à régler l'espace entre le rouleau (4) et la table rotative (3) sur la base de l'état lorsque le contact est détecté. Il est possible d'optimiser facilement l'espace entre la table rotative et le rouleau pour fabriquer un produit en poudre de haute qualité sans refroidir l'intérieur du boîtier ou libérer de l'air, effectuer un travail de restauration pour des opérations de redémarrage, etc.
PCT/JP2017/045393 2016-12-29 2017-12-18 Broyeur vertical WO2018123697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016257253A JP6914036B2 (ja) 2016-12-29 2016-12-29 竪型ミル
JP2016-257253 2016-12-29

Publications (1)

Publication Number Publication Date
WO2018123697A1 true WO2018123697A1 (fr) 2018-07-05

Family

ID=62707976

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Application Number Title Priority Date Filing Date
PCT/JP2017/045393 WO2018123697A1 (fr) 2016-12-29 2017-12-18 Broyeur vertical

Country Status (2)

Country Link
JP (1) JP6914036B2 (fr)
WO (1) WO2018123697A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6248436U (fr) * 1985-09-10 1987-03-25
JPH0528431U (ja) * 1991-09-25 1993-04-16 石川島播磨重工業株式会社 竪型ミルのガイド装置
JPH05345138A (ja) * 1992-06-13 1993-12-27 Kawasaki Heavy Ind Ltd 竪型ミルの間隙調整装置
JPH10118510A (ja) * 1996-10-18 1998-05-12 Kurimoto Ltd 竪型ミル
JPH11197525A (ja) * 1998-01-14 1999-07-27 Kurimoto Ltd 竪型ミル
JPH11342347A (ja) * 1998-06-01 1999-12-14 Mitsubishi Heavy Ind Ltd ローラミル
JP2000197830A (ja) * 1999-01-07 2000-07-18 Kurimoto Ltd 竪型ミル及びその間隙調整方法
JP2008178837A (ja) * 2007-01-26 2008-08-07 Ube Machinery Corporation Ltd 竪型粉砕機の制御方法及び竪型粉砕機
JP2012045496A (ja) * 2010-08-27 2012-03-08 Chugoku Electric Power Co Inc:The 竪型ミルの粉砕ローラの監視装置及び監視方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6248436U (fr) * 1985-09-10 1987-03-25
JPH0528431U (ja) * 1991-09-25 1993-04-16 石川島播磨重工業株式会社 竪型ミルのガイド装置
JPH05345138A (ja) * 1992-06-13 1993-12-27 Kawasaki Heavy Ind Ltd 竪型ミルの間隙調整装置
JPH10118510A (ja) * 1996-10-18 1998-05-12 Kurimoto Ltd 竪型ミル
JPH11197525A (ja) * 1998-01-14 1999-07-27 Kurimoto Ltd 竪型ミル
JPH11342347A (ja) * 1998-06-01 1999-12-14 Mitsubishi Heavy Ind Ltd ローラミル
JP2000197830A (ja) * 1999-01-07 2000-07-18 Kurimoto Ltd 竪型ミル及びその間隙調整方法
JP2008178837A (ja) * 2007-01-26 2008-08-07 Ube Machinery Corporation Ltd 竪型粉砕機の制御方法及び竪型粉砕機
JP2012045496A (ja) * 2010-08-27 2012-03-08 Chugoku Electric Power Co Inc:The 竪型ミルの粉砕ローラの監視装置及び監視方法

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