Contact determination method of refiner and refiner

Abstract

To provide a contact determination method of a refiner and a refiner, capable of grasping a contact point that is a position at which a stator and a rotor come in contact with each other objectively without sensibility of an operator or sound.SOLUTION: A contact determination method of a refiner employs a refiner A for beating a paper stock between stators 11, 12 and a rotor 13. In a test operation or in replacement of the stators 11, 12 and the rotor 13, the rotor 13 is moved while being rotated, a vibration made along a contact of the stators 11, 12 and the rotor 13 is measured by a vibration meter 50, and based on the obtained measured value, a position (point 0) where the stators 11, 12 contact with the rotor 13 is measured.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a refiner contact determination method and a refiner, and in particular to a refiner contact determination method and refiner that enable the contact point where the stator and rotor come into contact to be objectively grasped without relying on the operator's senses or sound. [Background technology]

[0002] Conventionally, there are refiners that beat the paper stock between a stator and a rotor (see patent documents). In order to accurately determine the clearance, it is necessary to accurately set the position (0 point) where the first stator and rotor and the second stator and rotor come into contact when replacing the stator and rotor. Conventionally, generally, the rotor is moved to the first stator side, and the contact position is set as the zero point between the rotor and the first stator. Also, the second stator is moved to the rotor side, and the contact position is set as the zero point between the rotor and the second stator. However, since it is not possible to confirm the contact position inside a sealed device by visual inspection or measurement, a method is adopted in which the rotor or stator is manually moved in the contact direction, and the position where the rotor or stator comes into contact and can no longer move is set as the 0 point. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4920496 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned method 1), the contact point can be difficult to accurately determine because the sound and sensation of contact vary from operator to operator due to the smoothness of the rotor and stator surfaces, the precision of the machine, backlash, etc. In addition, the above-mentioned method 2) requires that the surfaces of the rotor and the first and second stators be in even contact, and there is a problem in that the positions at which the current value, torque value, etc. increase are not uniform due to the influence of the smoothness of the rotor and stator surfaces, the precision of the machine, backlash, etc., and the probability that they will be the same as the contact positions during operation (while the rotor is rotating) is low.

[0005] The present invention aims to provide a refiner contact determination method and a refiner, which have been made in consideration of the above problems. [Means for solving the problem]

[0006] The method for determining contact of a refiner described in claim 1 is a refiner that beats paper stock between a stator and a rotor, and when the stator and rotor are first operated or replaced, the rotor is moved while rotating, and the vibrations associated with contact between the stator and rotor are measured with a vibration meter, and the position (0 point) where the stator and rotor come into contact is determined based on the obtained measurement value.

[0007] A method for determining contact of a refiner according to claim 2 includes a refiner having a first stator, a second stator arranged in parallel with the first stator and movable relative to the first stator, and a movable rotor arranged between the first stator and the second stator, and beating pulp in a gap between the first stator and the rotor and a gap between the second stator and the rotor, the method including, when the first stator and the rotor are started up or replaced, moving the rotor while rotating it, measuring vibrations caused by contact between the first stator and the rotor with a vibrometer, and determining a first position (0 point) where the first stator and the rotor contact based on the obtained measurement value, In addition, when the second stator and the rotor are first operated or replaced, the rotor is moved while rotating, and the vibrations caused by contact between the second stator and the rotor are measured with a vibrometer, and a second position (0 point) where the second stator and the rotor come into contact is determined based on the obtained measurement value.

[0008] In addition, the refiner described in claim 3 is a refiner that beats paper stock between a stator and a rotor, and when the stator and rotor are first operated or replaced, the rotor is moved while rotating, and the vibrations caused by contact between the stator and the rotor are measured with a vibrometer, and the position (0 point) where the stator and the rotor come into contact is determined based on the obtained measurement value.

[0009] A refiner according to claim 4 includes a first stator, a second stator arranged in parallel with the first stator and movable relative to the first stator, and a movable rotor arranged between the first stator and the second stator, and beats pulp in a gap between the first stator and the rotor and a gap between the second stator and the rotor. When the first stator and the rotor are started up or replaced, the rotor is moved while rotating to beat the pulp. The vibration caused by contact between the first stator and the rotor is measured with a vibrometer, and a first position (0 point) where the first stator and the rotor contact is determined based on the obtained measurement value. Also, when the second stator and the rotor are first operated or replaced, the rotor is moved while rotating, and the vibration caused by contact between the second stator and the rotor is measured with a vibrometer, and a second position (0 point) where the second stator and the rotor contact is determined based on the obtained measurement value. Effect of the Invention

[0010] According to the method for determining contact in a refiner described in claim 1, when the stator and rotor are first operated or replaced, the rotor is moved while rotating, and the vibrations associated with contact between the stator and rotor are measured with a vibration meter. The position (0 point) where the stator and rotor come into contact is determined based on the obtained measurement value. This makes it possible to objectively grasp the contact point, which was previously determined by the worker's senses or sound, and enables accurate determination of the contact point.

[0011] In addition, according to the refiner contact determination method described in claim 2, when the first stator and rotor start-up or are replaced, the rotor is moved while rotating, and the vibrations caused by contact between the first stator and the rotor are measured with a vibrometer, and the position (0 point) where the first stator and rotor contact is determined based on the obtained measurement value, so that the contact point that was previously determined by the worker's sense or sound can be grasped objectively and the contact point can be determined accurately.Furthermore, when the second stator and rotor start-up or are replaced, the rotor is moved while rotating, and the vibrations caused by contact between the second stator and the rotor are measured with a vibrometer, and the second position (0 point) where the second stator and rotor contact is determined based on the obtained measurement value, so that the contact point that was previously determined by the worker's sense or sound can be grasped objectively and the contact point can be determined accurately.

[0012] In addition, according to the refiner described in claim 3, when the stator and rotor are first operated or replaced, the rotor is moved while rotating, and the vibrations caused by contact between the stator and rotor are measured with a vibration meter. Based on the measurement value obtained, the position (0 point) where the stator and rotor come into contact can be determined. This makes it possible to objectively grasp the contact point, which was previously determined by the operator's senses or sound, and to accurately determine the contact point.

[0013] In addition, according to the refiner described in claim 4, when the first stator and rotor start up or are replaced, the rotor is moved while rotating, and the vibrations caused by contact between the first stator and the rotor are measured with a vibrometer, and the position (0 point) where the first stator and the rotor come into contact is determined based on the obtained measurement value, so that the contact point, which was previously determined by the worker's sense or sound, can be grasped objectively and the contact point can be determined accurately. Furthermore, when the second stator and rotor start up or are replaced, the rotor is moved while rotating, and the vibrations caused by contact between the second stator and the rotor are measured with a vibrometer, and the second position (0 point) where the second stator and the rotor come into contact is determined based on the obtained measurement value, so that the contact point, which was previously determined by the worker's sense or sound, can be grasped objectively and the contact point can be determined accurately. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic diagram of a refiner according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic exploded perspective view showing a main part of the beating means of FIG. 1. [Diagram 3] 2 is a schematic partial cross-sectional view showing details of a rotating shaft supporting means and a connecting means in FIG. 1. [Figure 4] FIG. 2 is a schematic diagram showing a control system for the rotor in FIG. [Diagram 5] FIG. 2 is a schematic partial cross-sectional view showing a modified example of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] A refiner contact determination method and a refiner according to one embodiment of the present invention will be described with reference to FIGS. 1 to 5.

[0016] An embodiment of the present invention will be described with reference to Fig. 1, taking a refiner, for example a conical refiner, as an example. A is a refiner according to the present invention, and refiner A is generally composed of a beating means 1, a rotor moving means 2, a rotor rotating means 5, and a rotor control means 8, and the beating means 1, the rotor moving means 2, and the rotor rotating means 5 are all mounted on a base 9.

[0017] The beating means 1 beats the pulp contained in the raw material liquid to a predetermined beaten state, and for example, as shown in Figure 1, has a case body 14 having a pulp outlet 14a at the top, a first stator 11 provided on one side of the case body 14, a second stator 12 arranged in parallel with the first stator 11 and movable relative to the first stator 11, and a movable rotor 13 provided between the first stator 11 and the second stator 12.

[0018] The first stator 11 includes a first stator body 110 and a fixed blade 111. The first stator body 110 has a flat surface portion 110a having a circular outer periphery and an outer surface portion 110b whose diameter gradually increases obliquely from the outer periphery of the flat surface portion 110a, and a fixed blade 111 for beating pulp is attached to the outer surface portion 110b. An axial hole 11a is formed in the center of the flat surface portion 110a of the first stator body 110, and the end portion with the increased diameter of the first stator body 110 is attached to the case body 14 either integrally or separately.

[0019] 1 and 2, the second stator 12 is attached to the side of the case body 14 opposite to the first stator 11 via a seal member 15 in a liquid-tight state and movable relative to the first stator 11, and includes a second stator body 120 and a fixed blade 121. The second stator body 120 has a flat surface portion 120a having a circular outer periphery and an inner surface portion 120b whose diameter gradually increases obliquely from the outer periphery of the flat surface portion 120a, and a fixed blade 121 for beating pulp is attached to the inner surface portion 120b. A pulp injection port 12a for injecting the raw material liquid p into the case body 14 is provided in the center of the flat surface portion 120a of the second stator body 120.

[0020] 1, the second stator 12 is provided with a second stator moving means 4 for moving the second stator 12 in the axial direction of the rotating shaft 16 relative to the first stator 11. The second stator moving means 4 is, for example, a means in which a ball screw 43 is connected to the rotating shaft of a servo motor 42, and a mounting member 44 having a female screw that screws into the ball screw 43 is connected to the second stator 12, and a position detection means 41 for detecting the position of the second stator 12 and transmitting the position information to the servo motor 42 is also provided.

[0021] The rotor 13 beats the pulp by rotating, and includes a rotor body 130 and rotary blades 131 and 132, as shown in Fig. 2. The rotor body 130 has a flat plate portion 130a having a circular outer periphery and a cone portion 130b whose diameter gradually increases obliquely from the outer periphery of the flat plate portion 130a, and the rotary blade 131 is provided on the inner surface of the cone portion 130b so as to face the fixed blade 111 of the first stator 11, and the rotary blade 132 is provided on the outer surface of the cone portion 130b so as to face the fixed blade 121 of the second stator 12. One end of the rotary shaft 16 is connected to the center of the flat plate portion 130a of the rotor body 130, and a through hole 13a for passing the raw material liquid p is provided around the periphery of this connection.

[0022] The fixed blades 111, 121 and the rotary blades 131, 132 may have a known shape (for example, a blade shape as described in JP-A-2000-250174).

[0023] 1, the other end of the above-mentioned rotating shaft 16 protrudes outside the first stator 11 through the shaft hole 11a of the first stator 11, and a rotating shaft support means 3 is provided halfway along the protruding rotating shaft 16 to support the rotating shaft 16. As shown in FIG. 3, the rotating shaft support means 3 includes bearings 31a, 31b fitted onto the outer circumferential surface of the rotating shaft 16 and a rotating shaft support member 32 fixed to the outer periphery of these bearings 31a, 31b, and supports the rotating shaft 16 rotatably. When the rotating shaft support means 3 is advanced or retreated in the axial direction of the rotating shaft 16, the rotating shaft 16 also advances or retreats in accordance with the advance or retreat, and the rotor 13 can be moved.

[0024] As shown in FIG. 1, the rotor moving means 2 is configured, for example, by connecting a ball screw 23 to the rotating shaft of a servo motor 22, and connecting an attachment member 24 having a female thread that screws into the ball screw 23 to the rotating shaft support member 32. A rotor position detection means 21 is also provided for detecting the axial position of the rotating shaft 16 (the position of the rotor 13) and transmitting the position information to the servo motor 22.

[0025] The rotor rotating means 5 described above rotates the rotor 13 and is, for example, a motor 51, and an end of a rotating shaft 52 of the motor 51 is connected to the rotating shaft 16 via a connecting means 6 (see FIG. 1).

[0026] As shown in Figure 3, this connecting means 6 is provided by connecting a connecting body 62 having teeth 62a that mesh with a gear 52a provided on the peripheral end of the rotating shaft 52 and allows the rotating shaft 16 to slide in the axial direction, and a connecting body 61 having teeth 61a that mesh with a gear 16a provided on the peripheral end of the rotating shaft 16 and allows the rotating shaft 16 to slide in the axial direction, and connecting the connecting bodies 61, 62 with flange portions 61b, 62b by bolts and nuts 63.

[0027] The rotor control means 8 described above controls the movement of the rotor 13 to an arbitrary position between the first stator 11 and the second stator 12, and is electrically connected to a calculation means 7 that calculates the set position of the rotor 13 by calculating the position information of the second stator 12 detected by the second stator position detection means 41, as shown in Fig. 4. The calculation means 7 may be configured to allow a correction coefficient to be input so that the ratio between the interval between the first stator 11 and the rotor 13 and the interval between the second stator 12 and the rotor 13 can be adjusted.

[0028] Also, reference numeral 50 shown in FIG. 1 denotes a vibration meter attached to the casing of the rotor shaft 16, and the contact point is determined by reading the change in the vibration meter 50. The vibration meter 50 may be, for example, a mechanical type, an electromagnetic type, a piezoelectric type, an optical type, an electromagnetic wave type, etc., but in this embodiment, a VTV121 manufactured by ifm electronic gmbh is used. For example, if the vibration of the vibrometer 50 when the first stator 11 and the rotor 13 are not in contact is 20, the vibration of the vibrometer 50 when the first stator 11 and the rotor 13 are in contact is 40. Similarly, if the vibration of the vibrometer 50 when the second stator 12 and the rotor 13 are not in contact is 20, the vibration of the vibrometer 50 when the second stator 12 and the rotor 13 are in contact is 40.

[0029] 1 is a drive motor, and if the drive motor 60 is inverter-driven, the drive motor 60 is rotated at a slow rotation speed (about 60 rpm) while moving to find the contact point between the first stator 11 and the rotor 13. If a speed reduction mechanism such as an inverter cannot be used for the drive motor 60, a small motor 60 is used to rotate the rotor shaft 16 at a slow rotation speed (about 60 rpm). The rotation of the drive motor 60 is transmitted to the rotor shaft 16 via, for example, a belt 61 and a connecting means 6. The drive motor 60 and the rotor rotating shaft 16 may be connected by, for example, a gear system (not shown) other than the belt 61. The movement of the rotor 13 to the first stator 11 is performed by driving the servo motor 22 of the rotor moving means 2. The drive motor 60 is connected to the rotor shaft 16 only when the zero point is set, and is disconnected from the rotor shaft 16 during normal operation.

[0030] Then, when the first stator 11 and rotor 13 are first operated or replaced, the rotor 13 is moved while rotating, and the vibration caused by contact between the first stator 11 and rotor 13 is measured by the vibrometer 50. Based on the obtained measurement value (for example, the measurement value of the vibrometer 50 is 40), the first position (0 point) where the first stator 11 and rotor 13 come into contact is determined. For example, if the vibration of the vibrometer 50 when the first stator 11 and the rotor 13 are not in contact with each other is 20, then the vibration of the vibrometer 50 when the first stator 11 and the rotor 13 are in contact with each other is 40. An example of the vibration meter 50 is the VTV121 manufactured by ifm electronic gmbh. As a result, according to the above-mentioned refiner contact determination method (refiner), the contact point, which was previously determined by the worker's senses or sound, can now be objectively grasped, making it possible to accurately determine the contact point.

[0031] In addition, when the second stator 12 and rotor 13 are first operated or replaced, the rotor 13 is moved while rotating, and the vibration caused by contact between the second stator 12 and rotor 13 is measured by a vibration meter 50. Based on the obtained measurement value (for example, the measurement value of the vibration meter 50 is 40), a second position (0 point) where the second stator 12 and rotor 13 come into contact is determined. For example, if the vibration of the vibrometer 50 when the second stator 12 and the rotor 13 are not in contact with each other is 20, the vibration of the vibrometer 50 when the second stator 12 and the rotor 13 are in contact with each other is 40. An example of the vibrometer 50 is the VTV121 manufactured by ifm electronic gmbh. In some cases, the second stator 12 may be brought into contact with the rotating rotor 13 by the second stator moving means 4, that is, the second stator 12 may be moved while rotating the rotor 13, and the vibration caused by the contact between the second stator 12 and the rotor 13 may be measured by the vibrometer 50, and the second position (0 point) where the second stator 12 and the rotor 13 are in contact with each other may be determined based on the obtained measurement value. As a result, according to the above-mentioned refiner contact determination method (refiner), the contact point, which was previously determined by the worker's senses or sound, can now be objectively grasped, making it possible to accurately determine the contact point.

[0032] Although the above-mentioned embodiment describes a conical type refiner, the present invention is not limited to conical type refiners. For example, as shown in FIG. 5, the present invention may be used in a so-called disk type refiner having a disk-shaped first stator 11' having a fixed blade 111', a disk-shaped second stator 12' arranged in parallel with the first stator 11' and having a fixed blade 121' movable relative to the first stator 11', and a disk-shaped rotor 13' arranged between the first stator 11' and the second stator 12' and having movable rotating blades 131', 132'.Furthermore, the present invention may be used in refiners of other configurations as long as the configuration has a rotor between the first stator and the second stator.

[0033] In the above-mentioned embodiment, a refiner having a first stator, a second stator arranged in parallel with the first stator and movable relative to the first stator, and a movable rotor arranged between the first stator and the second stator has been described. However, the present invention can also be applied to a refiner that beats the stock between the stator and the rotor. In other words, when the stator and rotor are first operated or replaced, the rotor is moved while rotating, and the vibrations associated with contact between the stator and rotor are measured with a vibrometer 50, and the position (0 point) where the stator and rotor come into contact is determined based on the obtained measurement value. According to this refiner contact determination method (or refiner), when the stator and rotor are first operated or replaced, the rotor is moved while rotating, and the vibrations associated with contact between the stator and rotor are measured with a vibrometer.The position (0 point) where the stator and rotor come into contact is determined based on the obtained measurement value.This makes it possible to objectively grasp the contact point, which was previously determined by the worker's senses or sound, and enables accurate determination of the contact point. [Explanation of symbols]

[0034] A Refiner p Raw material liquid a1, a2 Beating section 1 Beating means 11 First stator 12 Second stator 13 Rotor 2 Rotor movement means 3 Rotating shaft support means 4 Second stator moving means 5 Rotor rotation means 8 Rotor control means 50 Vibration meter 60 Drive motor 61 Belt

Claims

1. A refiner for beating a stock between a stator and a rotor, comprising: When the stator and rotor are first operated or replaced, the rotor is moved while rotating, and vibrations caused by contact between the stator and rotor are measured with a vibration meter, and the position (0 point) where the stator and rotor come into contact is determined based on the obtained measurement value. A method for determining contact of a refiner.

2. A refiner having a first stator, a second stator arranged in parallel with the first stator and movable relative to the first stator, and a rotor arranged between the first stator and the second stator and movable, and beating pulp in a gap between the first stator and the rotor and a gap between the second stator and the rotor, When the first stator and the rotor are started or replaced, the rotor is moved while being rotated, and vibrations caused by contact between the first stator and the rotor are measured with a vibration meter, and a first position (0 point) where the first stator and the rotor contact each other is determined based on the obtained measurement value; Furthermore, when the second stator and the rotor are first operated or replaced, the rotor is moved while being rotated, and vibrations caused by contact between the second stator and the rotor are measured with a vibration meter, and a second position (0 point) where the second stator and the rotor come into contact is determined based on the obtained measurement value. A method for determining contact of a refiner.

3. A refiner for beating a stock between a stator and a rotor, comprising: a vibration meter that measures vibrations caused by contact between the stator and the rotor by moving the rotor while rotating it when the stator and the rotor are first operated or when they are replaced; Based on the measurement value obtained by this vibration meter, the position (0 point) where the stator and rotor come into contact is determined. A refiner characterized by:

4. A refiner having a first stator, a second stator arranged in parallel with the first stator and movable relative to the first stator, and a rotor arranged between the first stator and the second stator and movable, and beating pulp in a gap between the first stator and the rotor and a gap between the second stator and the rotor, When the first stator and the rotor are started or replaced, the rotor is moved while being rotated, and vibrations caused by contact between the first stator and the rotor are measured with a vibration meter, and a first position (0 point) where the first stator and the rotor contact each other is determined based on the obtained measurement value; Furthermore, when the second stator and the rotor are first operated or replaced, the rotor is moved while being rotated, and vibrations caused by contact between the second stator and the rotor are measured with a vibration meter, and a second position (0 point) where the second stator and the rotor come into contact is determined based on the obtained measurement value. A refiner characterized by:

Images