阅读说明：本技术 筛分装置 (Screening device ) 是由 田川澄夫 信藤慎平 川野祥吾 于 2020-04-10 设计创作，主要内容包括：能够始终监视振动部的振动状态,迅速察觉机械故障、振动电动机的故障等,防止筛分带来的纯化功能降低。本发明提供一种筛分装置,具备架台和具有筛框的振动部,该振动部相对于所述架台沿俯视的一个方向进行往复振动,其中,振动部具备：第1传感器单元,其具有能够检测振动部的加速度的振动部加速度检测部和能够检测振动部的角速度的振动部角速度检测部；以及振动状态测定部,其基于第1传感器单元检测到的振动部的加速度以及角速度,测定振动部的振动状态。(The vibration state of the vibration part can be always monitored, mechanical faults, faults of the vibration motor and the like can be rapidly detected, and the reduction of the purification function caused by screening can be prevented. The present invention provides a screening device including a frame and a vibrating portion having a screen frame, the vibrating portion vibrating reciprocally in one direction in a plan view with respect to the frame, wherein the vibrating portion includes: a1 st sensor unit having a vibrating portion acceleration detecting portion capable of detecting an acceleration of the vibrating portion and a vibrating portion angular velocity detecting portion capable of detecting an angular velocity of the vibrating portion; and a vibration state measurement unit that measures a vibration state of the vibration unit based on the acceleration and angular velocity of the vibration unit detected by the 1 st sensor unit.)

1. A screening device comprising a frame and a vibrating unit having a screen frame, the vibrating unit vibrating reciprocally in one direction in a plan view with respect to the frame,

the screening device includes a1 st sensor unit in the vibrating portion, the 1 st sensor unit having a vibrating portion acceleration detecting portion capable of detecting at least an acceleration of the vibrating portion,

the screening device includes a vibration state measurement unit that measures a vibration state of the vibration unit based on the acceleration of the vibration unit detected by the 1 st sensor unit.

2. A screening device according to claim 1,

the 1 st sensor unit includes a vibrating portion angular velocity detecting portion capable of detecting an angular velocity of the vibrating portion,

the vibration state measuring unit measures the vibration state of the vibration unit based on the angular velocity of the vibration unit detected by the 1 st sensor unit.

3. A screening device according to claim 1 or 2,

the gantry includes a2 nd sensor unit, the 2 nd sensor unit includes a gantry acceleration detection unit capable of detecting an acceleration of the gantry and a gantry angular velocity detection unit capable of detecting an angular velocity of the gantry,

the vibration state measuring unit measures the vibration state of the gantry based on the acceleration and the angular velocity of the gantry detected by the 2 nd sensor unit.

4. A screening device according to claim 2 or 3,

the vibration state measured by the vibration state measuring unit is a vibration angle.

5. A screening device according to claim 1 or 3,

the vibration state measured by the vibration state measuring unit is displacement.

6. A screening device according to claim 5,

the vibration state measuring unit can measure displacement in at least a direction orthogonal to one direction in which the vibrating unit performs reciprocating vibration, based on the acceleration detected by the vibrating unit acceleration detecting unit.

7. A screening device according to claim 1,

the vibration state of the vibration unit measured by the vibration state measuring unit is a vibration frequency in the one direction.

8. A screening device according to any one of claims 1 to 7,

the screening device has a display device that displays the vibration state measured by the vibration state measuring unit.

9. A screening device is provided with: a stand; a vibrating unit having a screen frame that vibrates reciprocally in one direction in a plan view with respect to the stand; and a vibration motor configured to generate the reciprocating vibration of the vibration unit by rotating a rotor inside a housing, wherein the screening device includes:

an acceleration detection unit that is provided in a housing of the vibration motor and that is capable of detecting acceleration of the vibration motor in a radial direction of rotation of the rotor; and

and a vibration monitoring device for measuring a vibration state of the vibration motor based on the acceleration of the vibration motor detected by the acceleration detecting unit and monitoring the vibration unit and/or the vibration motor.

10. A screening device according to claim 9,

the acceleration detection unit includes a1 st acceleration detection unit that detects at least an acceleration in a direction parallel to one direction in which the vibration unit performs reciprocating vibration in a plan view.

11. A screening device according to claim 9,

the acceleration detection unit includes a2 nd acceleration detection unit, and the 2 nd acceleration detection unit detects at least an acceleration in a direction orthogonal to one direction in which the vibration unit performs reciprocating vibration in a plan view.

12. A screening device according to claim 9,

the acceleration detection unit includes:

a1 st acceleration detection unit that detects acceleration in a direction parallel to one direction in which the vibration unit performs reciprocating vibration in a plan view; and

and a2 nd acceleration detection unit that detects acceleration in a direction orthogonal to the one direction in which the vibration unit performs reciprocating vibration in a plan view.

13. A screening device according to claim 12,

vibration motors are provided on both sides of the vibration unit with a center axis along the one direction therebetween, and a1 st acceleration detection unit and a2 nd acceleration detection unit are provided on the vibration motors, respectively.

14. A screening device according to any one of claims 9 to 13,

the vibration monitoring device displays the cause of an abnormality and a method of dealing with the cause on a display device when a measured value is deviated from a predetermined threshold value.

Technical Field

The present invention relates to a sieving device for sieving granular materials according to particle sizes by vibration.

Background

Conventionally, as an apparatus for screening ground wheat or the like, for example, a purifier (purifier) described in patent document 1 is known.

This cleaning apparatus supports the four corners of a sieve box (sieve box) in which a plurality of sieves having different mesh sizes are arranged by pillars via rubber springs. Further, the screen box is connected to a vibration motor, and a supply tank for supplying the raw material before classification is connected to one end of the upper part of the screen box. A trap device for trapping falling raw materials is provided below the screen box.

When the vibration motor is operated, the screen box and the collection device are vibrated back and forth in the front-rear direction, and the raw material supplied to the screen box through the supply tank is oscillated, whereby the raw material is classified according to the particle size and collected by the collection device.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 8-39002

Disclosure of Invention

Problems to be solved by the invention

A screening device such as the purifying device described in patent document 1 does not have a function of monitoring the vibration state of the screen box during operation. Therefore, the swing angle and the swing width of the screen box are adjusted to appropriate values by visual observation during mounting.

After the start of the operation, the maintenance person also visually checks whether or not the swing state is properly maintained. The vibration frequency of the sieve box is set only by the output frequency of a motor inverter (inverter).

However, in the visual inspection, since the determination is different depending on the person in charge, even if there is an abnormality, there is a case where the response is delayed, and when the rubber spring supporting the screen box is deteriorated or the machine is broken down, there is a possibility that the abnormality is overlooked and an accident occurs. In addition, when the vibration motor fails, the raw material may not spread uniformly on the screen, and the purification performance may be reduced.

Further, since the vibration frequency of the vibrating portion is not measured, the set value may be different from the actual vibration frequency, and as a result, the sieving performance may not meet the product specification.

Further, if the bearing inside the vibration motor is damaged, the vibration motor is stopped suddenly, and before such an accident occurs, the danger cannot be perceived. Further, if the mounting bolt of the vibration motor is loosened, the vibration may not be appropriately transmitted to the screen box, and the screening performance may be degraded. Further, if the bearing of the vibration motor becomes loose, the life of the motor may be shortened.

The present invention has been made to solve the problem of providing a screening device capable of constantly monitoring the vibration state of a vibration unit, quickly detecting a mechanical failure, a failure of a vibration motor, and the like, and preventing a reduction in the purification function due to screening. Further, a screening device capable of constantly monitoring the vibration state of the vibration motor itself and quickly responding to an abnormality of the vibration motor is provided.

Means for solving the problems

The invention according to claim 1 of the present application is a screening device including a frame and a vibrating portion having a screen frame and configured to perform reciprocating vibration in one direction in a plan view with respect to the frame, wherein the screening device includes a1 st sensor unit in the vibrating portion, the 1 st sensor unit includes a vibrating portion acceleration detecting portion configured to detect at least an acceleration of the vibrating portion, and the screening device includes a vibration state measuring portion configured to measure a vibration state of the vibrating portion based on the acceleration of the vibrating portion detected by the 1 st sensor unit.

In the invention according to claim 2 of the present application, in the screening device according to claim 1, the 1 st sensor unit includes a vibrating portion angular velocity detection portion capable of detecting an angular velocity of the vibrating portion, and the vibration state measurement portion measures the vibration state of the vibrating portion based on the angular velocity of the vibrating portion detected by the 1 st sensor unit.

In the invention according to claim 3 of the present application, in the screening device according to claim 1 or 2, the gantry includes a2 nd sensor unit, the 2 nd sensor unit includes a gantry acceleration detection unit capable of detecting an acceleration of the gantry and a gantry angular velocity detection unit capable of detecting an angular velocity of the gantry, and the vibration state measurement unit measures the vibration state of the gantry based on the acceleration and the angular velocity of the gantry detected by the 2 nd sensor unit.

In the invention according to claim 4 of the present application, in the screening device according to claim 2 or 3, the vibration state measured by the vibration state measuring unit is a vibration angle.

In the invention according to claim 5 of the present application, in the screening device according to claim 1 or 3, the vibration state measured by the vibration state measuring unit is displacement.

In the invention according to claim 6 of the present application, in the screening device according to claim 5, the vibration state measuring unit may measure displacement in a direction orthogonal to at least one direction in which the vibrating portion vibrates reciprocally, based on the acceleration detected by the vibrating portion acceleration detecting unit.

In the invention according to claim 7 of the present application, in the screening device according to claim 1, the vibration state of the vibrating portion measured by the vibration state measuring unit is a vibration frequency in the one direction.

The invention according to claim 8 of the present application is the screening device according to any 1 of claims 1 to 7, wherein the screening device includes a display device that displays the vibration state measured by the vibration state measuring unit.

The invention according to claim 9 of the present application is a screening device including: a stand; a vibrating unit having a screen frame that vibrates reciprocally in one direction in a plan view with respect to the stand; and a vibration motor configured to generate the reciprocating vibration of the vibration unit by rotating a rotor inside a housing, wherein the screening device includes: an acceleration detection unit that is provided in a housing of the vibration motor and that is capable of detecting acceleration of the vibration motor in a radial direction of rotation of the rotor; and a vibration monitoring device for measuring a vibration state of the vibration motor based on the acceleration of the vibration motor detected by the acceleration detecting unit and monitoring the vibration unit and/or the vibration motor.

In the invention according to claim 10 of the present application, in the screening device according to claim 9, the acceleration detection unit includes a1 st acceleration detection unit, and the 1 st acceleration detection unit detects at least an acceleration in a direction parallel to one direction in which the vibration unit performs reciprocating vibration in a plan view.

In the invention according to claim 11 of the present application, in the screening device according to claim 9, the acceleration detection unit includes a2 nd acceleration detection unit, and the 2 nd acceleration detection unit detects at least an acceleration in a direction orthogonal to one direction in which the vibration unit performs reciprocating vibration in a plan view.

In the invention according to claim 12, in the screening device according to claim 9, the acceleration detection unit includes: a1 st acceleration detection unit that detects acceleration in a direction parallel to one direction in which the vibration unit performs reciprocating vibration in a plan view; and a2 nd acceleration detection unit that detects acceleration in a direction orthogonal to one direction in which the vibration unit performs reciprocating vibration in a plan view.

In the invention according to claim 13 of the present application, in the screening device according to claim 12, the vibration portion is provided with vibration motors on both sides across a center axis in the one direction, and the vibration motors are provided with a1 st acceleration detection portion and a2 nd acceleration detection portion, respectively.

In the invention according to claim 14 of the present application, in the screening device according to any one of claims 9 to 13, the vibration monitoring device displays a cause of the abnormality and a method of dealing with the cause on a display device when the measured value deviates from a predetermined threshold value.

Effects of the invention

According to the present invention, since the vibration state of the vibrating portion can be always monitored, it can be immediately perceived that the vibration state is out of the appropriate range. This makes it possible to quickly cope with a mechanical failure or the like and also prevent a reduction in screening accuracy.

Further, the 2 nd sensor unit including a gantry acceleration detection unit capable of detecting acceleration of the gantry and a gantry angular velocity detection unit capable of detecting angular velocity of the gantry is provided, and by measuring the vibration state of the gantry, it is possible to know the horizontal state of the gantry, the transmission of vibration from the peripheral machine, the degree of vibration due to the hardness of the foundation on which the gantry is provided, the structure, and the like. Further, the reduction in sieving performance due to these influences can be suppressed.

Further, the vibration state measuring unit can measure the displacement in the direction orthogonal to the one direction in which the vibrating portion vibrates based on the acceleration detected by the vibrating portion acceleration detecting unit, and thus can accurately measure the magnitude of the vibration in the direction orthogonal to the one direction without being affected by the vibration in the one direction, and the abnormality sensing accuracy is improved.

Further, by providing a monitoring device for displaying the vibration state measured by the vibration state measuring unit, the vibration state can be known in real time, and the occurrence of an abnormality can be easily noticed.

Further, since the vibration state of the vibration motor can be constantly monitored, it is possible to promptly detect an abnormality of the bearing, the mounting bolt, the bearing, or the like of the vibration motor, and to promptly respond thereto. This prevents a reduction in screening accuracy and a reduction in durability of the vibration motor.

Further, by including the 1 st acceleration detection unit that detects acceleration in a direction parallel to one direction in which the vibration unit performs reciprocating vibration in a plan view, it is possible to quickly detect not only the vibration motor but also an abnormality of the reciprocating vibration due to a vibration state of the vibration unit, a failure of a portion supporting the vibration unit, or the like.

Further, by including the 2 nd acceleration detection unit that detects the acceleration in the direction orthogonal to the one direction in which the vibration unit performs the reciprocating vibration in a plan view, the vibration state in the direction orthogonal thereto can be accurately measured without being affected by the normal vibration of the vibration unit, that is, the vibration in the one direction, and the abnormality sensing accuracy is improved.

Further, by providing the vibration motors on both sides of the vibration unit with the center axis in one direction interposed therebetween and providing the 1 st acceleration detection unit and the 2 nd acceleration detection unit on each of these vibration motors, it is possible to quickly detect an abnormality in synchronization of the two vibration motors.

Further, the vibration monitoring device displays the cause of the abnormality and the method of dealing with the abnormality on the display device when the measured value deviates from the predetermined threshold value, thereby enabling even an inexperienced person to immediately and accurately deal with the abnormality.

Drawings

Fig. 1 is a side view showing a sieving apparatus according to embodiment 1 of the present invention.

Fig. 2 is a front view showing a sieving device according to embodiment 1 of the present invention.

Fig. 3 is a block diagram of the monitoring device and the 1 st sensor unit according to embodiment 1 of the present invention.

Fig. 4 is a signal processing block diagram showing a sieving device according to embodiment 1 of the present invention.

Fig. 5 is a diagram showing a display example of a monitoring device according to embodiment 1 of the present invention.

Fig. 6 is a front view showing a sieving device according to embodiment 2 of the present invention.

Fig. 7 is a block diagram of the monitoring device, the 1 st sensor unit, and the 2 nd sensor unit according to embodiment 2 of the present invention.

Fig. 8 is a diagram showing a display example of a monitoring device according to embodiment 2 of the present invention.

Fig. 9 is a diagram showing a display example of a monitoring device according to embodiment 2 of the present invention.

Fig. 10A is a side view showing the installation angle of the stand of the screening device according to embodiment 2 of the present invention.

Fig. 10B is a front view showing the installation angle of the stand of the sieving device according to embodiment 2 of the present invention.

Fig. 11 is a side view showing a sieving apparatus according to embodiment 3 of the present invention.

Fig. 12 is a rear view showing a sieving apparatus according to embodiment 3 of the present invention.

Fig. 13A is a rear view of the vibration motor in embodiment 3 of the present invention.

Fig. 13B is a plan view of the vibration motor according to embodiment 3 of the present invention.

Fig. 14 is a front view showing a sieving device according to embodiment 3 of the present invention.

Fig. 15 is a block diagram of an acceleration detection unit and a vibration monitoring device according to embodiment 3 of the present invention.

Fig. 16 is a signal processing block diagram showing a screening device according to embodiment 3 of the present invention.

Fig. 17 is a diagram illustrating a correspondence relationship between the determination result of the acceleration signal and the cause of the abnormality in embodiment 3 of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like. Needless to say, the present invention is not limited to the embodiments.

[ embodiment 1 ]

Fig. 1 to 5 show embodiment 1 of the present invention.

As shown in fig. 1 and 2, the screening device 1 of the present invention includes a frame 2 and a vibrating portion 4, wherein the vibrating portion 4 has a screen frame 3 that vibrates reciprocally in one direction in a plan view with respect to the frame 2.

In the following description, the direction in which the vibrating portion 4 vibrates reciprocally is referred to as the X direction (the left-right direction of the paper in fig. 1, the depth direction of the paper in fig. 2), the direction perpendicular to the X direction in a plan view is referred to as the Y direction (the depth direction of the paper in fig. 1, the left-right direction of the paper in fig. 2), and the direction perpendicular to the X direction and the Y direction is referred to as the Z direction (the up-down direction of the paper in fig. 1 and 2).

Support columns 5 are provided at four corners of the stand 2, and the vibrating portion 4 is supported by rubber springs 6 attached to these support columns 5.

The vibration portion 4 is provided with a vibration motor 7, and the vibration portion 4 is reciprocally vibrated in the X direction by operating the vibration motor 7.

A frame, not shown, is provided on the stand 2, and a cover 30 is provided on the frame. The frame 2, the frame, and the cover 30 do not vibrate reciprocally.

The supply cylinder 8 supplies the granular material before being sifted into the screen frame 3 from above.

In the screen frame 3 of the vibrating section 4, a plurality of screens having different mesh sizes are stacked so that the mesh size becomes finer as the screen goes downward.

The vibrating section 4 is provided with a trap device 9 for collecting the particulate matter passing through each screen of the screen frame 3 in a classified manner, and the particulate matter collected by the trap device 9 is taken out to the outside of the machine. The particulate matter remaining on the screen frame 3 is discharged to the outside of the machine through a path different from the path of the particulate matter collected by the collection device 9.

The above structure is conventionally known, and therefore, a detailed description thereof is omitted.

As shown in fig. 1 and 2, a1 st sensor unit 10 is attached to an outer surface of the screen frame 3 of the vibrating portion 4.

As shown in fig. 3, the 1 st sensor unit 10 includes a vibrating portion acceleration detecting portion 11 capable of detecting acceleration of the vibrating portion 4 in the 3-axis direction and a vibrating portion angular velocity detecting portion 12 capable of detecting angular velocity of the vibrating portion 4 in the 3-axis direction.

The 1 st sensor unit 10 is connected to a monitoring device 13 (see fig. 2) provided on the outer surface of the cover 30.

The monitoring device 13 is provided with a vibration state measuring unit 14, a display device 16, an alarm buzzer 17, and the like.

The vibration portion acceleration detection portion 11, the vibration portion angular velocity detection portion 12, the display device 16, and the alarm buzzer 17 of the 1 st sensor unit 10 are connected to the vibration state measurement portion 14. The vibration state measuring unit 14 is connected to the operation management system of the facility via a common external communication means.

The vibration state measuring unit 14 is an arithmetic processing unit that measures the vibration state of the vibration unit 4 based on the acceleration of the vibration unit 4 detected by the vibration unit acceleration detecting unit 11 and the angular velocity of the vibration unit 4 detected by the vibration unit angular velocity detecting unit 12. The measured vibration state is converted into display information and transmitted to the display device 16.

Next, signal processing of the sieving apparatus 1 will be described with reference to fig. 4.

By performing the operation start operation, the sieving device 1 is started, the vibrating portion 4 performs the reciprocating vibration, and the 1 st sensor unit 10 starts the detection.

The acceleration of the vibrating portion 4 detected by the vibrating portion acceleration detecting portion 11 and the angular velocity of the vibrating portion 4 detected by the vibrating portion angular velocity detecting portion 12 of the first sensor unit 10 are transmitted to the vibrating state measuring portion 14 by wireless communication or wired communication, respectively.

The vibration state measuring unit 14 measures the displacement of the vibration unit 4 in the 3-axis direction and the vibration frequency in the X-axis direction from the acceleration of the vibration unit 4, and measures the vibration angle of the vibration unit 4 in the 3-axis direction from the acceleration and the angular velocity of the vibration unit 4.

The displacement is measured by removing noise components from the detected acceleration, removing the influence of the gravitational acceleration, and performing 2-time integration.

The vibration angle is calculated from the acceleration and angular velocity of the vibrating portion 4 using a kalman filter, an extended kalman filter, a Madgwick filter, a complementary filter, or the like.

The vibration state measuring unit 14 synthesizes waveforms based on the displacements in the X-axis direction, the Y-axis direction, and the Z-axis direction of the measured vibration unit 4, and displays the Lissajous-Figure (left Figure in fig. 5), the X-Z-axis Lissajous-Figure (center Figure in fig. 5), and the Y-Z-axis Lissajous-Figure (right Figure in fig. 5) of the displacement on the display screen of the display device 16, as shown in fig. 5, with the magnitudes and directions of the displacements being orthogonal to each other.

Further, displacements of the vibrating portion 4 in the X-axis direction, the Y-axis direction, and the Z-axis direction, vibration angles in 3 directions (an inclination angle in the X-Y plane, an inclination angle in the X-Z plane, and an inclination angle in the Y-Z plane due to vibration), vibration frequencies in the X-axis direction, and amplitudes in the X-axis direction measured from the synthesized waveforms are displayed as numerical values on a screen of the display device 16.

In FIG. 5, as the displacement, the X-axis direction was-4.48 to 4.48mm, the Y-axis direction was-0.02 to 0.01mm, the Z-axis direction was-0.47 to 0.47mm, and as the vibration angle, the inclination angle in the X-Z plane was 6.0 degrees, the inclination angle in the X-Y plane was 0.0 degrees, the inclination angle in the Y-Z plane was 0.0 degrees, the amplitude in the X-axis direction was 9.00mm, and the vibration frequency in the X-axis direction was 10.00Hz, indicating that the operation was in steady state.

As shown by the numerical values, the vibrating portion 4 vibrates in the X-axis direction, slightly vibrates in the Z-axis direction, and hardly vibrates in the Y-axis direction. The inclination angle in the X-Z plane of 6.0 ° means that the screen frame 3 is inclined downward in the left direction of the drawing as shown in fig. 1, and the actual vibrating portion 4 does not vibrate parallel to the X-axis direction but vibrates obliquely as shown by the double arrow in fig. 1.

In the vibration state measuring unit 14, the displacement, the vibration angle, the vibration frequency, and the amplitude of the vibration unit 4 in an appropriate range are set as determination values in advance. The vibration state measuring unit 14 compares the measured displacement with a displacement determination value, compares the measured vibration angle with an angle determination value, compares the measured vibration frequency with a vibration frequency determination value, and compares the measured amplitude with an amplitude determination value.

When all the measurement values of the vibration state measurement unit 14 have converged within the determination value, the vibration state of the vibration unit 4 is displayed on the screen of the display device 16, and the display is normal in characters as in "steady operation".

On the other hand, when these values deviate from the determination values, an abnormality is processed to operate the alarm buzzer 17, and the character display of the display device 16 is changed to "unstable" or the like, thereby notifying the occurrence of an abnormality to the operator or the supervisor.

[ 2 nd embodiment ]

Fig. 6 to 10 show embodiment 2 of the present invention.

In embodiment 2, in addition to the structure of embodiment 1, as shown in fig. 6, a2 nd sensor unit 18 attached to a gantry 2 is provided.

The 2 nd sensor unit 18 includes a gantry acceleration detection unit 19 capable of detecting the acceleration of the gantry 2 and a gantry angular velocity detection unit 20 capable of detecting the angular velocity of the gantry 2, similar to the 1 st sensor unit 10.

As shown in fig. 7, the 2 nd sensor unit 18 is connected to the vibration state measuring unit 14 of the monitoring device 13. The acceleration of the gantry 2 detected by the gantry acceleration detector 19 and the angular velocity of the gantry 2 detected by the gantry angular velocity detector 20 of the 2 nd sensor unit 18 are transmitted to the vibration state measuring unit 14 of the monitoring device 13.

The vibration state measuring unit 14 measures the vibration state of the gantry 2 in the same manner as the measurement of the vibration state of the vibrating unit 4 in embodiment 1. This makes it possible to detect, as a displacement, a swing of the stand 2 caused by an installation angle of the stand 2, an influence of vibration transmitted from a machine disposed around, hardness of a base on which the screening device 1 is installed, and the like.

Since the mount 2 is originally fixed and is not affected by the reciprocating vibration of the vibrating portion 4 due to the rubber spring 6, the displacement and the installation angle are usually measured, and the vibration frequency and the amplitude are not measured.

The vibration state measuring unit 14 converts the measured vibration state of the gantry 2 into display information and transmits the display information to the display device 16, and displays the vibration state of the vibration unit 4 as shown in fig. 8 on the screen of the display device 16.

On the display screen of the display device 16, the displacement of the gantry 2 is displayed as a lissajous figure of X-Y axis (left figure of fig. 8), a lissajous figure of X-Z axis (center figure of fig. 8), and a lissajous figure of Y-Z axis (right figure of fig. 8) which are orthogonal to each other.

Further, the displacements of the gantry 2 in the X-axis direction, the Y-axis direction, and the Z-axis direction are displayed as numerical values.

In FIG. 8, as the displacement, the displacement is normal in the X-axis direction of-0.10 to 0.10mm, in the Y-axis direction of-0.02 to 0.01mm, and in the Z-axis direction of-0.02 to 0.02 mm.

As shown by this numerical value, it is understood that the mount 2 is hardly displaced, that is, the vibration of the vibrating portion 4 is not transmitted, and the rubber spring 6 sufficiently functions.

The vibration state measuring unit 14 sets the displacement in the appropriate range of the gantry 2 as a determination value, and the vibration state measuring unit 14 compares the measured displacement with the displacement determination value.

When all the measurement values of the vibration state measurement unit 14 are within the determination value, "normal" is displayed in text on the screen of the display device 16.

When the measured value deviates from the determination value, an abnormality process is performed to operate the alarm buzzer 17, and the character display of the display device 16 is changed from "normal" to "abnormal" or the like.

Even if the alarm buzzer 17 operates in the same manner, the operator or the supervisor can observe the character display and immediately understand whether the vibrating portion 4 is defective or the gantry 2 is defective.

The vibration state measuring unit 14 may convert the measured vibration state of the gantry 2 into display information and transmit the display information to the display device 16, and may display the display information on the screen of the display device 16 together with the vibration state of the vibration unit 4 as shown in fig. 9.

On the display screen of the display device 16, the installation angle of the gantry 2 is displayed as an image simulating a level meter.

Fig. 9 shows the current state of the gantry 2 as a level within a circular range showing the X axis and the Y axis. A circle of a thick line simulating a bubble is the current state of the gantry 2. The circle diameter of the two-dot chain line indicates the allowable range. In addition, the setting angle around the X axis and the setting angle around the Y axis are displayed as numerical values. In the figure, the setting angle around the X axis is 0.2 ° and the setting angle around the Y axis is-0.4 ° among the displayed setting angles, and the setting angle of the stand 2 is normal when the current state is within the allowable range.

Fig. 10A and 10B show the direction of the installation angle of the gantry 2. As shown in fig. 10A, the installation angle of the gantry 2 around the Y axis is centered on the 2 nd sensor unit 18, and is positive when the left side is raised, and is negative when the left side is lowered. As shown in fig. 10B, the installation angle of the gantry 2 around the X axis is centered on the 2 nd sensor unit 18, and is positive when the right side is raised and negative when the right side is lowered.

By performing the display in a manner similar to a level, an operator or a supervisor can easily understand the installation state of the gantry.

Although not shown, the display device 16 may be a touch panel, and text buttons such as "calibrate", "hold", and "reset" may be displayed on the display screen in an operable manner in addition to the image of the analog level.

For example, the "calibrate" button is provided as a momentary switch in a state of being continuously turned on during being touched. In addition, the "hold" button and the "reset" button are provided as alternate switches to alternately switch on and off states each time they are touched.

At the time (timing) when the user leaves after touching the "calibration" button, the setting angles of the gantry 2 around the X axis and the Y axis at this time are set to 0 °, and the state of the subsequent setting angle change can be measured.

By touching the "hold" button, the displayed value of the setting angle of the gantry 2 can be stopped at an arbitrary timing. Thus, even when the value of the installation angle measured by the vibration transmitted from the vibration unit 4 to the gantry 2 varies at any time and is difficult to see, the value of the installation angle displayed on the display screen of the display device 16 can be stopped and confirmed.

By touching the "reset" button, the value of the displayed setting angle of the gantry 2 can be returned to the factory-initiated adjustment value of the vibration state measurement unit 14.

In this way, by operating the display device 16 provided in the monitoring device 13 to adjust the vibration state measuring unit 14, it is possible to significantly reduce the trouble of adjustment and regular maintenance when the vibration state measuring unit 14 is attached.

Further, a determination value of the displacement and the installation angle in an appropriate range of the gantry 2 may be set in the vibration state measuring unit 14, and the measured displacement and installation angle may be compared with the determination value to perform determination.

In this case, when all the measurement values of the vibration state measurement unit 14 are within the determination value, the screen of the display device 16 displays "normal" with characters. When the measured value deviates from the determination value, an abnormality process is performed to operate the alarm buzzer 17, and the character display of the display device 16 is changed from "normal" to "abnormal" or the like.

In this way, even if the alarm buzzer 17 is operated, the operator or the supervisor can see the character display and immediately understand whether the vibrating section 4 is defective or the gantry 2 is defective.

[ embodiment 3 ]

Next, embodiment 3 will be explained.

As shown in fig. 11 and 12, the screening device 1 of the present embodiment includes: a stand 2; a vibrating unit 4 having a screen frame 3 and vibrating reciprocally in one direction in a plan view with respect to the stand 2; and 2 vibration motors M1 and M2 that generate reciprocating vibration of the vibration unit 4 by rotating the rotor inside the housing 107.

In the following description, a direction parallel to the direction in which the vibrating portion 4 vibrates reciprocally in a plan view is referred to as an X direction (a left-right direction of the paper in fig. 11, a depth direction of the paper in fig. 12), and a direction perpendicular to the X direction in a plan view is referred to as a Y direction (a depth direction of the paper in fig. 11, a left-right direction of the paper in fig. 12).

Support columns 5 are provided at four corners of the stand 2, and the vibrating portion 4 is supported by rubber springs 6 attached to these support columns 5.

A frame, not shown, is provided on the stand 2, and a cover 30 is provided on the frame. The frame 2, the frame, and the cover 30 do not vibrate reciprocally.

The supply cylinder 8 supplies the granular material before being sifted into the screen frame 3 from above.

In the screen frame 3 of the vibrating section 4, a plurality of screens having different mesh sizes are stacked so that the mesh size becomes finer as the screen goes downward.

The vibrating section 4 is provided with a trap device 9 for collecting the particulate matter passing through each screen of the screen frame 3 in a classified manner, and the particulate matter collected by the trap device 9 is taken out to the outside of the machine. The particulate matter remaining on the screen frame 3 is discharged to the outside of the machine through a path different from the path of the particulate matter collected by the collection device 9.

The above structure is conventionally known, and therefore, a detailed description thereof is omitted.

Vibration motors M1 and M2 are provided on both sides of vibration unit 4 with a center axis in the X direction interposed therebetween. The rotors and the unbalance weights in the casings 107 of the two vibration motors M1 and M2 rotate in opposite directions to each other, and the unbalance weights synchronously cause the vibration unit 4 to reciprocally vibrate in the X direction. The rotors and unbalance weights in the housings 107 of the vibration motors M1 and M2 correspond to the rotors of the present invention. The plane containing the rotation circle of the rotor is substantially parallel to the XY plane. The vibration motors M1 and M2 also vibrate together with the vibration unit 4.

As shown in fig. 13A and 13B, acceleration detection units 110 and 111 capable of detecting acceleration in the radial direction of rotation of the rotor are provided on the outer surfaces of the housings 107 of the vibration motors M1 and M2, respectively. The acceleration detection units 110 and 111 detect the acceleration of the vibration motors M1 and M2.

The acceleration detector 110 of the vibration motor M1 includes a1 st acceleration detector a1 that detects acceleration in the X direction and a2 nd acceleration detector a2 that detects acceleration in the Y direction.

The acceleration detector 111 of the vibration motor M2 includes a1 st acceleration detector A3 that detects acceleration in the X direction and a2 nd acceleration detector a4 that detects acceleration in the Y direction.

The 1 st acceleration detection units a1 and A3 are sensors that detect acceleration in one axis direction, and are provided to detect acceleration of the vibration motors M1 and M2 in the X direction in the radial direction of rotation of the rotor, respectively. The 2 nd acceleration detection units a2 and a4 are sensors that detect acceleration in one axis direction, and are provided to detect acceleration of the vibration motors M1 and M2 in the Y direction in the radial direction of rotation of the rotor, respectively.

As shown in fig. 15, the 1 st acceleration detection units a1 and A3 and the 2 nd acceleration detection units a2 and a4 are connected to a vibration monitoring device 113 (see fig. 14) provided on the outer surface of the cover 30.

The vibration monitoring device 113 is provided with a signal processing unit 114, a display device 16, an alarm buzzer 17, and the like.

The 1 st acceleration detector a1, A3, the 2 nd acceleration detector a2, a4, the display device 16, and the alarm buzzer 17 are connected to the signal processor 114. The signal processing unit 114 is connected to the operation management system of the facility via a general-purpose external communication means.

Next, signal processing of the sieving apparatus 1 will be described with reference to fig. 16.

By performing the operation start operation, the sieving device 1 is started, the vibration motors M1 and M2 are rotated, and the vibration unit 4 is vibrated in the X direction (the actual vibration unit 4 is not vibrated in parallel with the X direction, but is vibrated obliquely as shown by the double arrow in fig. 11). At the same time as the start of vibration, the 1 st acceleration detection unit a1 and the 2 nd acceleration detection unit a2 of the vibration motor M1 and the 1 st acceleration detection unit A3 and the 2 nd acceleration detection unit a4 of the vibration motor M2 start detection.

The acceleration signals in the X direction and the Y direction of the vibration motors M1 and M2 acquired by the 1 st acceleration detection units a1 and A3 and the 2 nd acceleration detection units a2 and a4 are transmitted to the signal processing unit 114 by wireless communication or wired communication.

The signal processing unit 114 detects the vibration frequency F in the X direction and the Y direction of the vibration motor M1 and the X direction and the Y direction of the vibration motor M2, respectively, based on the acceleration signals transmitted from the 1 st acceleration detection units a1 and A3 and the 2 nd acceleration detection units a2 and a 4.

Then, the vibration frequency F is compared with threshold values Fmin to Fmax of vibration frequencies set in advance in a normal range to perform abnormality determination. If the detected vibration frequency F exceeds the threshold values Fmin to Fmax, the signal processing unit 114 performs warning processing.

Since the reciprocating vibration is performed in the X direction, it is expected that the vibration frequency in the Y direction is lower than the vibration frequency in the X direction. Therefore, if the threshold Fmax in the Y direction is set to be small, the abnormality can be detected early.

In the vibration frequency abnormality determination, it is possible to determine whether the vibration unit operates at a predetermined vibration frequency or the vibrator operates at a predetermined vibration frequency.

Further, signals of the vibration frequency F, the frequency 2F which is 2 times the vibration frequency F, and the frequency 3F which is 3 times the vibration frequency F are subjected to processing of attenuating a predetermined frequency band other than the frequency band by a Band Pass Filter (BPF), the acceleration effective values are summed, and the sum is compared with preset threshold values a1 and a2 to perform the abnormality determination a. In the example shown in fig. 16, the frequency bands other than F ± 1Hz, 2F ± 2Hz, and 3F ± 3Hz are attenuated, but the range may be arbitrarily changed.

The signal processing unit 114 performs the attention process when the total value exceeds the threshold a1 and does not reach the threshold a2 as a result of the abnormality determination a, and performs the warning process when the total value exceeds the threshold a 2.

The signal processing unit 114 removes a predetermined frequency band from the signal of the vibration frequency F, the frequency 2F which is 2 times the vibration frequency F, and the frequency 3F which is 3 times the vibration frequency F by a band rejection filter (BSF), performs FFT conversion on the extracted signal, and calculates the total value for each of the low frequency band (1Hz to 100Hz), the middle frequency band (100Hz to 1kHz), and the high frequency band (1kHz or more). In the example shown in fig. 16, the removal frequency bands are F ± 1Hz, 2F ± 2Hz, and 3F ± 3Hz, but the range may be arbitrarily changed.

Next, the total value of the low frequency bands is compared with the set thresholds B1 and B2 to perform the abnormality determination B, and when the total value exceeds the threshold B1 and does not reach the threshold B2, the attention processing is performed, and when the total value exceeds the threshold B2, the warning processing is performed.

The total value of the intermediate frequency bands is compared with the thresholds C1 and C2 to perform the abnormality determination C, and when the total value exceeds the threshold C1 and does not reach the threshold C2, the attention processing is performed, and when the total value exceeds the threshold C2, the warning processing is performed.

The total value of the high frequency bands is compared with the thresholds D1 and D2 to perform the abnormality determination D, and when the total value exceeds the threshold D1 and does not reach the threshold D2, the attention processing is performed, and when the total value exceeds the threshold D2, the warning processing is performed.

The threshold value set for the attention process is a level (level) to be checked within about one month. As the attention processing of the signal processing unit 114, the operation of the sieving device 1 is continued, but the display device 16 displays the abnormality, the cause of the abnormality corresponding to the abnormality in the vibration state, and the method of coping with the abnormality. At the same time, the same content as the content displayed on the display device 16 by the external communication is transmitted to the operation management system.

The threshold set for warning processing is larger than the threshold for attention processing, and is a level that needs immediate response. As the warning processing by the signal processing unit 114, the operation of the sieving device 1 is immediately stopped, and the alarm buzzer 17 is activated to notify the occurrence of an abnormality to the operator or the supervisor, and the cause of the abnormality corresponding to the abnormality in the vibration state and the method of coping with the abnormality are displayed on the display device 16. At the same time, the same content as the content displayed on the display device 16 by the external communication is transmitted to the operation management system.

Fig. 17 shows an abnormality of the vibration state, a cause of the abnormality corresponding to the abnormality, and a method of coping with the abnormality.

For example, in the abnormality determination a, when the vibration frequency based on the acceleration signal in the X direction acquired by the 1 st acceleration detector a1 or A3 is Good (GO), and when the vibration frequency based on the acceleration signal in the Y direction acquired by the 2 nd acceleration detector a2 or a4 is abnormal (NG), or when the vibration state in both directions is abnormal, the display device 16 displays "imbalance of the upper and lower weights of the vibration motor", "deviation of the vibration frequency of the 2 nd motor", "reduction of the elastic force of the rubber spring", and the like as the causes of the abnormality, and displays "inspection of the vibration frequency of the vibration motor", "inspection of the rubber spring", and the like as the methods of coping with the abnormality.

On the other hand, in the abnormality determination a, when the vibration state in the X direction detected by the 1 st acceleration detector a1 or A3 is abnormal (NG) and the vibration state in the Y direction detected by the 2 nd acceleration detector a2 or a4 is Good (GO), the display device 16 displays "the elastic force of the rubber spring is weakened" as the cause of the abnormality and "the inspection of the rubber spring" as the measure of coping with the abnormality.

In the high-frequency-band abnormality determination D, when at least one of the total value based on the acceleration signals in the X direction acquired by the 1 st acceleration detector a1 or A3 and the total value based on the acceleration signals in the Y direction acquired by the 2 nd acceleration detector a2 or a4 is abnormal (NG), the display device 16 displays "wear of the bearing" as the cause of the abnormality and "inspection of the bearing and injection of grease" as the method of coping with the abnormality.

In fig. 17, the correspondence between the abnormality in the vibration state and the cause of the abnormality is merely given as an example. The determination method and the corresponding method are different depending on the use of the screening device, the installation environment, and the like, and thus are determined appropriately.

[ other modifications ]

The present invention is not limited to the above-described embodiments. For example, the following is also included.

In embodiment 1, the vibration state measuring unit measures all of the vibration angle, displacement, vibration frequency, and amplitude of the vibrating unit and displays the measured values on the monitoring device, but may be a part of the measuring unit.

Further, since the vibration of the vibrating portion in one direction (X direction) in a plan view is a direction in which the vibration should be originally performed, the vibration hardly causes a problem. However, since the vibration in the direction (Y direction, Z direction) perpendicular to the vibration has an influence such as scattering of the particulate matter and mechanical failure, the vibration state measuring unit may measure only the displacement in the Y direction and the Z direction, and may not measure the displacement in the X direction.

In order to prevent the granular material on the screen frame from overflowing, the inclination angles in the X to Z planes and the inclination angles in the Y to Z planes may be set aside. Therefore, as the angle determination value, it is only necessary to set appropriate inclination angles in the X-Z plane and the Y-Z plane and compare these angle determination values with the measured inclination angles in the X-Z plane and the Y-Z plane.

In the screening device in which the two vibrating motors 7 rotate in opposite directions to each other and the internal unbalance weight vibrates in synchronization in one direction (X direction) when viewed from the top of the vibrating portion, abnormality in synchronization of the two vibrating motors can be detected as soon as possible by paying attention to at least the displacement in the Y direction.

In embodiment 2, the vibration state measuring unit measures the installation angle and displacement of the gantry and displays the measurement result by the monitoring device, but any one of these may be used.

In embodiment 2, the vibration state measuring unit measures the installation angle and displacement of the gantry and displays the measurement result by the monitoring device, but at least one of the vibration frequency and the vibration amplitude may be measured in the same manner as the measurement of the vibration unit. In this case, the vibration frequency and amplitude can be monitored, and the transmission of vibration of the vibrating portion due to, for example, breakage of the rubber spring can be quickly found.

In the present embodiment, the vibration state is measured when the vibration unit starts reciprocating, but the present invention is not limited to this, and the vibration state may be measured by operating the 1 st sensor unit, the 2 nd sensor unit, and the monitoring device 13 when the reciprocating is not performed. In this case, the postures of the vibrating section and the gantry can be measured when the vibrating section is stationary.

In the present embodiment, the 1 st sensor unit is attached to the screen frame of the vibrating portion 4, but is not limited thereto. Any position may be used as long as it is a vibrating portion.

In the present embodiment, the monitoring device is attached to the cover of the screening device, but the present invention is not limited thereto, and may be a monitoring device that is not directly attached to the screening device but is provided at a separate position. A device provided with such a monitoring device is also included in the screening device of the present invention.

In the present embodiment, the installation angle of the stand is displayed as a level as shown in fig. 9, but the present invention is not limited thereto, and may be displayed as a numerical value as in the displacement shown in fig. 8. For example, in the screen shown in fig. 8, the same display as the "vibration angle" in fig. 5 may be performed in parallel as the "setting angle" beside the "displacement (p-p)".

Further, the vibration state measuring unit may set an angle determination value for the installation angle of the gantry, and the installation angle measured by the vibration state measuring unit may be compared with the angle determination value. In this case, when the measured installation angle falls within the angle determination value, the display device may display "normal" or the like on the screen in the same manner as the displacement shown in fig. 8. In addition, when the measured installation angle deviates from the angle determination value, the abnormality processing may be performed to operate the alarm buzzer and change the character display of the display device from "normal" to "abnormal" or the like, in the same manner as in the case of displacement.

In the present embodiment, the case where the measurement of the vibrating portion and the rack is performed during the operation of the vibrating portion of the screening apparatus has been described, but the measurement is not limited to this, and may be performed when the operation of the vibrating portion is stopped. In this case, it is also possible to monitor the state of the installation posture immediately after the installation and before the operation, the posture at the time of the operation stop, the transmission of vibration from another screening device in the adjacent operation, and the like.

In the present embodiment, the vibration portion acceleration detection portion and the vibration portion angular velocity detection portion are provided in order to detect the vibration state of the vibration portion, but the present invention is not limited to this. Only the vibration portion acceleration detection portion may be provided. In this case, the angular velocity cannot be detected, and the vibration angle cannot be measured, but simple measurement is possible, and cost reduction is achieved.

In embodiment 3, the 1 st acceleration detection units a1 and A3 that detect the acceleration in the X direction in which the vibrating unit 4 performs reciprocating vibration, and the 2 nd acceleration detection units a2 and a4 that detect the acceleration in the Y direction orthogonal to the X direction are provided. Here, since the vibration direction important for determining whether or not the vibration motors M1, M2 vibrate at an appropriate vibration frequency is the X direction, the 2 nd acceleration detection units a2, a4 may be omitted.

Since the bearings of the two vibration motors M1 and M2 have substantially the same tendency to deteriorate, if only the deterioration of the bearings is monitored, it is possible to maintain 2 bearings while providing an acceleration detection unit at an intermediate position between the two vibration motors M1 and M2 or providing an acceleration detection unit only at one vibration motor. In order to monitor the abnormality of each vibration motor, it is necessary to provide an acceleration detection unit for each of the two vibration motors M1 and M2.

In embodiment 3, the acceleration detecting unit uses a sensor that detects acceleration in one axis direction, but is not limited to this. A sensor capable of detecting acceleration in the biaxial direction may be used. In this case, the X-axis and the Y-axis are measured. If such a sensor is used, the trouble of providing two detection portions in the vibration motor can be eliminated.

In embodiment 3, the vibration frequency is measured and determined, but the vibration frequency may be measured and displayed on a display device. In this way, it is easy to know whether or not the vibration unit or the vibration motor operates at the set vibration frequency.

In embodiment 3, the vibration unit and the vibration motor are monitored, but either one may be monitored.

Each technical matter in any one embodiment may be applied to other embodiments as an example.

Description of the symbols

1 screening device

2 stand

3 Screen frame

4 vibration part

5 support post

6 rubber spring

7 vibration motor

107 shell

8 supply cylinder

9 catching device

10 st sensor unit

110. 111 acceleration detecting part

11 vibration part acceleration detection part

12 vibration part angular velocity detection part

13 monitoring device

14 vibration state measuring part

113 vibration monitoring device

114 signal processing section

16 display device

17 alarm buzzer

18 nd 2 sensor unit

19 stand acceleration detection unit

20 stand angular velocity detection unit

30 covers.