JP7308364B2 - Spinning type crusher and its failure sign diagnosis device and method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gyration crusher, a failure predictor diagnosis device for a gyration crusher, and a failure predictor diagnosis method for a gyration crusher.

Conventionally, it has a concave that forms a crushing chamber and a mantle fixed to the main shaft, and the main shaft is eccentrically rotated with the upper suspension part as a fulcrum, and the crushed material is caught and crushed between the concave and the mantle. Gyratory crushers are known. Such a gyration crusher is sometimes used for crushing rocks, ores, and the like in mines. In order to deal with the shortage of skilled workers in mines, labor-saving operations through remote centralized monitoring are being considered. Therefore, there is a demand for an automated orbital crusher with high maintainability. The high maintainability of the gyration crusher includes low frequency of maintenance, short downtime, and the like.

Patent Literature 1 discloses a remote monitoring system for a crusher. In this system, an automatic operation control panel and a remote central monitoring panel are connected by wire or wirelessly, and the central monitoring panel monitors information on the automatic operation control panel and remotely operates the automatic operation control panel. Here, the crushing force of the crusher changes depending on the size of the outlet set of the crushing liner (concave and mantle) and the amount of input raw material, and this change appears as a change in crushing pressure and motor load. Therefore, the automatic operation control panel detects a change in the outlet set and a change in the motor load based on the outlet set detection signal and the load detection signal. The automatic operation control panel stabilizes the motor load by generating an alarm when motor overload or packing occurs and automatically widening the outlet set to prevent damage to the machine body. The central monitoring panel displays a monitoring screen showing the operating status of the crusher in real time. The monitoring screen displays the current outlet set value and motor load factor as operating data, and if there is an abnormality in the operating condition, a red lamp lights up for each item of the abnormal condition until the abnormality disappears.

JP-A-2000-070752

A rotary crusher is conventionally provided with a safety device called an interlock circuit. This safety device mainly acquires process data such as hydraulic oil temperature, oil amount, current amount, oil level, etc. Allow operation of the crusher only within the specified range. The safety device also issues an anomaly alarm if these process data are outside the set range.

The central monitoring panel and the safety device of Patent Document 1 mentioned above inform the operator of a state in which an abnormality has occurred in the crusher. In response to the occurrence of the abnormality, the operator immediately stops the operation, starts maintenance, and places an order for replacement parts. However, many of the replacement parts for the crusher are exclusive parts, and it takes time to obtain them after ordering, which may lead to prolonged downtime and a significant decrease in productivity.

In order to reduce downtime, it is effective to catch signs of failures before they actually occur and to start preparations for maintenance when signs of failure are observed. In view of the above circumstances, in order to reduce downtime, the present disclosure provides a crusher that diagnoses signs of failure by analyzing information detected by the crusher during operation and a method for diagnosing signs of failure. The purpose is to make a proposal.

A gyration-type crusher according to an aspect of the present disclosure includes:
a main shaft;
a mantle fixed to the main shaft;
a concave disposed to face the mantle and forming a crushing chamber with the mantle;
an eccentric sleeve that supports a lower portion of the main shaft via a lower bearing;
a drive motor for rotating the eccentric sleeve;
a horizontal shaft rotationally driven by the drive motor, a bevel pinion provided on the horizontal shaft, and a bevel gear provided on the eccentric sleeve meshing with the bevel pinion, wherein the output of the drive motor is transmitted to the eccentric sleeve. a power transmission mechanism that transmits;
a meshing vibration detector that detects meshing vibration acceleration caused by meshing of the bevel pinion and the bevel gear;
and a failure sign diagnostic device.

A failure sign diagnosis device for a gyration crusher according to an aspect of the present disclosure includes:
A meshing vibration acceleration generated by the meshing of the bevel pinion and the bevel gear is acquired, and a meshing vibration acceleration waveform in which the meshing vibration acceleration detected during a non-crushing load period in which no material to be crushed is supplied to the crushing chamber is arranged in time series is obtained. Then, based on the analysis result of the meshing vibration acceleration waveform, the presence or absence of a sign of failure is diagnosed.

Further, a failure sign diagnosis method for a gyration crusher according to an aspect of the present disclosure includes:
Acquiring meshing vibration acceleration caused by meshing of the bevel pinion and the bevel gear;
Obtaining a meshing vibration acceleration waveform in which the meshing vibration acceleration detected during a non-crushing load period in which no material to be crushed is supplied to the crushing chamber is arranged in time series;
Presence or absence of a sign of failure is diagnosed based on the analysis result of the meshing vibration acceleration waveform.

According to the present disclosure, it is possible to propose a crusher for diagnosing signs of failure using information detected by the crusher in operation and a method for diagnosing signs of failure. As a result, it is possible to contribute to shortening the downtime from failure of the crusher to recovery.

FIG. 1 is a diagram showing a schematic configuration of a gyration crusher according to an embodiment of the present disclosure. FIG. 2 is a block diagram showing the configuration of the control system of the crusher. FIG. 3 is a block diagram showing a configuration relating to predictive failure diagnosis. FIG. 4 is a diagram showing the flow of processing of the failure predictor diagnosis device. FIG. 5 is an example of the frequency analysis result of the meshing vibration acceleration waveform during the non-crushing load period. FIG. 6 is an example of the frequency analysis result of the meshing vibration acceleration waveform during the crushing load period.

Next, embodiments of the present disclosure will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a gyration crusher 100 according to an embodiment of the present disclosure. The orbital crusher 100 shown in FIG. 1 is a gyratory crusher or a cone crusher, and the structure of the crusher 100 itself, excluding the failure sign diagnostic device 40 and the control device 50, is known.

The orbital crusher 100 comprises a frame 30 consisting of an upper frame 31 and a lower frame 32 connected thereto. A center axis A extending vertically is defined in the center of the interior space of the frame 30 . A hopper 3 is connected to the top of the frame 30 . The material to be crushed is supplied to the hopper 3 from a conveyor, which is a supply device 9 .

A main shaft 5 is arranged substantially in the center of the frame 30 . The center axis of the main shaft 5 is inclined with respect to the body center axis A. The upper end of the main shaft 5 is supported by the upper frame 31 via the upper bearing 17 . The upper bearing 17 is provided on a spider 18 projecting inward from the upper end of the upper frame 31 . The lower end of the main shaft 5 is supported by the ram 61 of the bearing cylinder 6 via the main shaft thrust bearing 2 . The bearing cylinder 6 is a hydraulic cylinder composed of a cylinder tube 62 and a ram 61 that slides inside the cylinder tube 62 .

A lower portion of the main shaft 5 is rotatably inserted into the eccentric sleeve 4 . The eccentric sleeve 4 is rotatably inserted into a boss 7 formed on the lower frame 32 . A lower portion of the eccentric sleeve 4 is supported by a lower frame 32 via a thrust sliding bearing 23 .

A mantle core 12 is fixed to the upper portion of the main shaft 5 . The outer surface of the mantle core 12 is a truncated conical surface. A mantle 13 is attached to the outer surface of the mantle core 12 . The outer surface of the mantle 13 is a truncated cone. The outer surface of the mantle 13 faces the inner surface of the concave 14 provided on the inner surface of the upper frame 31 . The inner surface of the concave 14 and the outer surface of the mantle 13 form a crushing chamber 16 having a wedge-shaped vertical cross section. The objects to be crushed supplied to the hopper 3 flow into the crushing chamber 16 under their own weight.

A cylindrical partition plate 24 is provided above the boss 7 . A hydraulic chamber 27 is formed by the partition plate 24 above the eccentric sleeve 4 and boss 7 and below the mantle core 12 . Lubricant is supplied from the hydraulic chamber 27 to between the outer peripheral surface of the main shaft 5 and the inner peripheral surface of the eccentric sleeve 4 and between the outer peripheral surface of the eccentric sleeve 4 and the inner peripheral surface of the boss 7 . A journal sliding bearing formed between the outer peripheral surface of the main shaft 5 and the inner peripheral surface of the eccentric sleeve 4 is called a "main shaft bearing 10" and is formed between the outer peripheral surface of the eccentric sleeve 4 and the inner peripheral surface of the boss 7. The journal slide bearing thus formed is called a "sleeve bearing 11". A multiple bearing formed by the main shaft bearing 10 and the sleeve bearing 11 is called a "lower bearing 15".

A drive motor 8 is provided outside the frame 30 . Power is transmitted from the output shaft 8 a of the drive motor 8 to the eccentric sleeve 4 via the power transmission mechanism 20 . The power transmission mechanism 20 includes a pulley 22a provided on the output shaft 8a, a horizontal shaft 21, a pulley 22b provided on the horizontal shaft 21, a power transmission belt 22c wound around the pulleys 22a and 22b, and a power transmission belt 22c provided on the horizontal shaft 21. and a bevel gear 19b provided on the eccentric sleeve 4. The horizontal shaft 21 is supported by the lower frame 32 via horizontal shaft bearings 25 . When the eccentric sleeve 4 rotates, the main shaft 5 performs an eccentric turning motion with respect to the machine body center axis A, that is, a so-called precession motion. As a result, the distance between the outer surface of the mantle 13 and the inner surface of the concave 14 changes according to the turning position of the main shaft 5 . The objects to be crushed that have fallen into the crushing chamber 16 are crushed between the concave 14 and the mantle 13 and collected from below the lower frame 32 as crushed products.

The crusher 100 configured as described above includes a failure sign diagnosis device 40 and a control device 50 . The control device 50 controls the operation of the crusher 100 . The failure predictor diagnostic device 40 diagnoses whether or not there is a predictor of failure of the crusher 100 based on the information detected by the crusher 100 during operation or start-up operation.

[Control device 50]
FIG. 2 is a block diagram showing the configuration of the control system of the crusher 100. As shown in FIG. As shown in FIG. 2, the control device 50 is connected with a display device 58, a setting device 59, a failure sign diagnosis device 40, various instruments 52, 55, 56, and controlled objects 8, 9, 6. . The functions of the failure predictor diagnostic device 40 and the control device 50 disclosed in this specification include general-purpose processors, dedicated processors, integrated circuits, ASICs (Application Specific Integrated Circuits), conventional and/or combinations thereof. A processor is considered a processing circuit or circuit because it contains transistors and other circuits. In this disclosure, a circuit, unit, or means is hardware that performs or is programmed to perform the recited functions. The hardware may be the hardware disclosed herein, or other known hardware programmed or configured to perform the recited functions. A circuit, means or unit is a combination of hardware and software, where the hardware is a processor which is considered a type of circuit, the software being used to configure the hardware and/or the processor.

The control device 50 controls the supply amount of the material to be crushed. The control device 50 is connected to the drive motor 9a of the supply device 9 wirelessly or by wire. The control device 50 transmits a command signal corresponding to the target supply amount to the drive motor 9a of the supply device 9 . The driving motor 9 a operates in response to a command signal from the control device 50 to supply a target supply amount of crushed objects from the supply device 9 to the hopper 3 .

Controller 50 controls the value of the exit set. The exit set (closed set) is defined as the narrowest gap between the two fracture surfaces of the concave 14 and mantle 13 . In the crusher 100 according to this embodiment, the bearing cylinder 6 functions as a set adjusting device. When the main shaft thrust bearing 2 moves up and down together with the ram 61, the mantle 13 moves up and down with respect to the concave 14, changing the value of the outlet set. The value of the outlet set determines the grain size of the ground product.

A hydraulic chamber 63 is formed in the cylinder tube 62 of the bearing cylinder 6 to change its capacity according to the displacement of the ram 61 , and the hydraulic circuit 90 is connected to the hydraulic chamber 63 . The ram 61 is raised by supplying hydraulic oil to the hydraulic chamber 63 through the hydraulic circuit 90 . Further, the ram 61 is lowered by draining the hydraulic oil in the hydraulic chamber 63 to the oil tank 71 through the hydraulic circuit 90 . The controller 50 is connected wirelessly or by wire to a set sensor 52 that detects the value of the exit set. The control device 50 acquires the information detected by the set sensor 52 and raises and lowers the ram 61 so that the exit set value detected by the set sensor 52 becomes the target exit set value. In order to raise and lower the ram 61, the control device 50 operates a pump motor and a solenoid valve (both not shown) provided in the hydraulic circuit 90, and adjusts the cylinder hydraulic pressure so that the desired position of the ram 61 is obtained. generate.

A control device 50 controls the rotation speed of the eccentric sleeve 4 . The number of rotations of the eccentric sleeve 4 has a corresponding relationship with the number of rotations of the horizontal shaft 21 and the number of rotations of the main shaft 5 which are rotationally driven by the drive motor 8 . The control device 50 is connected to the drive motor 8 wirelessly or by wire. The control device 50 transmits a command signal corresponding to the target rotational speed to the drive motor 8 . By operating the drive motor 8 in response to the command signal from the control device 50, the rotational speed of the eccentric sleeve 4 becomes the target rotational speed.

[Failure sign diagnosis device 40]
FIG. 3 is a block diagram showing a configuration relating to predictive failure diagnosis. As shown in FIG. 3 , a meshing vibration detector 43 , a bearing vibration detector 44 and a load detector 56 are connected to the failure sign diagnostic device 40 . The meshing vibration detector 43 detects vibration acceleration of the meshing portion between the bevel pinion 19a and the bevel gear 19b. The meshing vibration detector 43 is provided on the main body of the crusher 100 (for example, the lower frame 32, the sleeve of the horizontal shaft 21, etc.). The meshing vibration detector 43 may be provided in the vicinity of the meshing portion between the bevel pinion 19a and the bevel gear 19b on the lower frame 32 . A bearing vibration detector 44 detects vibration acceleration of the horizontal shaft bearing 25 . A bearing vibration detector 44 is provided on the horizontal shaft bearing 25 . The load detector 56 indirectly detects the crushing load by detecting the motor load of the drive motor 8 . The load detector 56 detects the current value (motor current) supplied to the drive motor 8 using the motor current as an index of the motor load.

By measuring the meshing vibration acceleration between the bevel pinion 19a and the bevel gear 19b and arranging them in time series, a meshing vibration acceleration waveform can be obtained. FIG. 6 is an example of the frequency analysis result of the meshing vibration acceleration waveform during the crushing load period. As shown in FIG. 6, the power spectrum obtained by analyzing the meshing vibration acceleration waveform during crushing includes vibrations due to crushing in addition to vibrations due to meshing. Therefore, it is difficult to extract only the characteristic frequency component that is a sign of failure from the meshing vibration acceleration waveform during crushing. Therefore, the failure predictor diagnostic device 40 diagnoses whether or not there is a predictor of failure using the meshing vibration acceleration detected during the non-crushing load period in which no material to be crushed is supplied to the crushing chamber 16 . The non-crushing load period can appear not only during start-up operation of the crusher 100 but also during steady operation. The crusher 100 detects non-crushing load periods during start-up operation and steady-state operation, and samples the meshing vibration acceleration during the non-crushing load period.

FIG. 4 is a diagram showing the flow of processing of the failure predictor diagnosis device 40. As shown in FIG. As shown in FIG. 4, the failure predictor diagnostic device 40 acquires the value of the crushing load detected by the load detector 56 during start-up operation and steady-state operation of the crusher 100 (step S1). The failure predictor diagnosis device 40 compares the acquired crushing load value with a predetermined load threshold (step S2). This load threshold value is a crushing load value at which it can be assumed that there is no object to be crushed in the crushing chamber 16 and that crushing is not being performed. The load threshold value obtained by experiments or simulations is set in advance in the failure sign diagnosis device 40 .

If the crushing load is greater than or equal to the load threshold (NO in step S2), the process returns to step S1, and steps S1 and S2 are repeated. On the other hand, if the crushing load is smaller than the load threshold (YES in step S2), the failure sign diagnostic device 40 starts sampling the meshing vibration acceleration detected by the meshing vibration detector 43. FIG.

The failure sign diagnostic device 40 acquires and monitors the value of the crushing load even during sampling of the meshing vibration acceleration (step S4). If the crushing load is smaller than the load threshold (YES in step S5), sampling is continued until a predetermined sampling time elapses (NO in step S6) after starting sampling. Sampling time can be arbitrarily set, and sufficient time is set to analyze the meshing vibration acceleration waveform.

On the other hand, if the crushing load is greater than or equal to the load threshold (NO in step S5) and if the sampling time has elapsed since the start of sampling (YES in step S6), the failure sign diagnostic device 40 is finished (step S7). The failure sign diagnosis device 40 diagnoses a sign of failure using the sampled meshing vibration acceleration (step S8).

A frequency analysis result of the meshing vibration acceleration is obtained by performing FFT spectrum processing on the meshing vibration acceleration waveform during the non-crushing load period. FIG. 5 is an example of the frequency analysis result of the meshing vibration acceleration waveform during the non-crushing load period. In the power spectrum of the meshing vibration acceleration waveform shown in FIG. 5, a peak due to meshing appears prominently at the meshing frequency, and some peaks of sideband waves appear at frequencies other than the meshing frequency.

In the vibration analysis of a rotating machine, it is known that when a meshing gear fails, a sideband wave peak occurs in the power spectrum of the meshing vibration acceleration in addition to the meshing peak at the meshing frequency. There is also known a technique for estimating the location and cause of a failure by specifying the frequency at which a peak of the sideband occurs, the state of dispersion, and the like. If no fault has occurred, the power spectrum does not show any noticeable sideband peaks, but it can be a precursor.

Therefore, the failure sign diagnosis device 40 obtains a meshing vibration acceleration waveform in which the meshing vibration acceleration detected by the meshing vibration detector 43 during the non-crushing load period is arranged in time series. Diagnose the presence or absence of signs of In the analysis, a characteristic frequency component that is a sign of failure is extracted from the meshing vibration acceleration waveform, and the extracted characteristic frequency component is quantified according to a predetermined rule. The failure predictor diagnostic device 40 diagnoses the presence or absence of a failure predictor based on the degree of failure predictor quantified in this manner. For example, the failure sign diagnosis device 40 performs FFT spectrum processing on the meshing vibration acceleration waveform, obtains the total value (overall value) of the spectrum of the entire analysis frequency band, and if the total value exceeds a predetermined diagnostic threshold, the failure is found, and if the total value is equal to or less than a predetermined diagnostic threshold, it is judged that no sign of failure has been found. Further, for example, the failure sign diagnostic device 40 performs FFT spectrum processing on the meshing vibration acceleration waveform, obtains a total value (partial overall value) of the spectrum of a certain specific frequency band, and determines that the total value is a predetermined diagnostic threshold value. It is determined that a sign of failure has been found when the total value exceeds the predetermined diagnostic threshold, and it is determined that no sign of failure has been found when the sum is equal to or less than a predetermined diagnostic threshold.

The failure predictor diagnostic device 40 notifies the failure predictor when the failure predictor is found. Notification of a sign of failure is performed through the display device 58, for example. The operator receives notification of a sign of failure and starts preparations for maintenance. Maintenance preparation involves securing spare parts and related materials, and establishing a maintenance system. Building a maintenance system includes reviewing the operation plan, drafting a parts replacement schedule, and securing workers. During the maintenance preparation period, the crusher 100 continues to operate until failure actually occurs or the possibility of failure increases. In other words, it is possible to earn time for maintenance preparation without stopping the operation of the crusher 100 . In this way, downtime can be reduced compared to the case where maintenance preparations are started after a failure is detected.

As described above, the orbital crusher 100 according to the above embodiment
a spindle 5;
a mantle 13 fixed to the main shaft 5;
a concave 14 arranged to face the mantle 13 and forming a crushing chamber 16 with the mantle 13;
a supply device 9 for supplying the object to be crushed to the crushing chamber 16;
an eccentric sleeve 4 that supports the lower portion of the main shaft 5 via a lower bearing 15;
a drive motor 8 for rotating the eccentric sleeve 4;
It includes a horizontal shaft 21 that is rotationally driven by the drive motor 8, a bevel pinion 19a arranged on the horizontal shaft 21, and a bevel gear 19b that is arranged on the eccentric sleeve 4 and meshes with the bevel pinion 19a. a power transmission mechanism 20 that transmits power to the sleeve 4;
a meshing vibration detector 43 for detecting meshing vibration acceleration caused by the meshing of the bevel pinion 19a and the bevel gear 19b;
and a failure sign diagnostic device 40 .

Then, the predictive diagnosis device 40 of the orbiting crusher 100 according to the above-described embodiment acquires the meshing vibration acceleration generated by the meshing of the bevel pinion 19a and the bevel gear 19b, and detects the non-crushing load in which the object to be crushed is not supplied to the crushing chamber 16. A meshing vibration acceleration waveform is obtained by arranging the meshing vibration acceleration detected in the period in time series, and the presence or absence of a sign of failure is diagnosed based on the analysis result of the meshing vibration acceleration waveform.

The failure predictor diagnostic device 40 performs FFT spectrum processing on the meshing vibration acceleration waveform, obtains the sum of the spectra of the entire analysis frequency band, and finds a failure predictor when the sum exceeds a predetermined diagnostic threshold. If the total value is equal to or less than the diagnostic threshold, it may be determined that no sign of failure was found. Alternatively, the failure sign diagnostic device 40 performs FFT spectrum processing on the meshing vibration acceleration waveform, obtains a total value of spectra in a certain specific frequency band, and detects a failure when the total value exceeds a predetermined diagnostic threshold. is found, and if the total value is equal to or less than a predetermined diagnostic threshold, it may be judged that no sign of failure has been found.

Similarly, the failure sign diagnosis method for the orbital crusher 100 according to the above embodiment includes:
Acquiring the meshing vibration acceleration caused by the meshing of the bevel pinion 19a and the bevel gear 19b,
Obtaining a meshing vibration acceleration waveform in which meshing vibration acceleration detected during a non-crushing load period in which no material to be crushed is supplied to the crushing chamber 16 is arranged in time series,
Presence or absence of a sign of failure is diagnosed based on the analysis result of the meshing vibration acceleration waveform.

In the above, diagnosing the presence or absence of a sign of failure is performed by performing FFT spectrum processing on the meshing vibration acceleration waveform, obtaining the total value of the spectrum of the entire analysis frequency band, and when the total value exceeds a predetermined diagnostic threshold. It may include determining that a failure predictor has been found, and determining that no failure predictor has been found if the sum is less than or equal to a diagnostic threshold. Alternatively, in the above, diagnosing the presence or absence of a sign of failure involves performing FFT spectrum processing on the meshing vibration acceleration waveform, obtaining a total value of spectra in a certain specific frequency band, and determining the total value as a predetermined diagnostic threshold. and determining that no failure symptom was found if the sum is less than or equal to a predetermined diagnostic threshold.

According to the crusher 100, the failure sign diagnostic device 40 and the method for the crusher 100 configured as described above, the bevel pinion 19a and the bevel gear 19b receive a crushing load. Vibration effects can be ignored. Therefore, it is possible to extract a characteristic frequency component that is a sign of failure from meshing vibration acceleration waveforms of the bevel pinion 19a and the bevel gear 19b. Since it is possible to diagnose whether or not there is a sign of failure of the crusher 100 (in particular, failure of the bevel pinion 19a and the bevel gear 19b), preparation for maintenance can be started when a sign of failure is found. In other words, it is possible to earn time for maintenance preparation without stopping the operation of the crusher 100 . In this way, downtime can be reduced compared to the case where maintenance preparations are started after a failure is detected.

Further, the failure sign diagnostic device 40 for the crusher 100 according to the above-described embodiment acquires the crushing load of the crusher 100, regards a period in which the crushing load is below a predetermined load threshold as a non-crushing load period, The meshing vibration acceleration is sampled during the crushing load period.

Similarly, in the failure sign diagnosis method for the crusher 100 according to the above-described embodiment, the crushing load is detected, the period in which the crushing load is lower than a predetermined load threshold is regarded as the non-crushing load period, and during the non-crushing load period The meshing vibration acceleration is sampled.

By determining the non-crushing load period based on the crushing load in this way, the meshing vibration acceleration is automatically sampled during the non-crushing load period that occurs during the operation of the crusher 100. It is possible to automatically diagnose signs of failure without stopping the operation of the equipment.

Although the preferred embodiments of the present disclosure have been described above, the present disclosure also includes changes in the details of the specific structures and/or functions of the above embodiments within the scope of the inventive idea of the present disclosure. obtain. For example, the above configuration can be modified as follows.

For example, although the crusher 100 described above is a hydraulic crusher 100 whose outlet set is regulated by the cylinder pressure of the bearing cylinder 6, the crusher 100 may be a mechanical crusher 100. The mechanical gyration crusher 100 includes an elevating device (for example, a hydraulic cylinder) that elevates the concave 14 with respect to the mantle 13 .

For example, the failure sign diagnosis device 40 may be remotely arranged with respect to the crusher 100 . In this case, the information detected by the meshing vibration detector 43 and the bearing vibration detector 44 is transmitted to the failure sign diagnosis device 40 through the communication network, and the failure sign diagnosis device 40 transmits the diagnosis result of the failure sign to the crusher through the communication network. 100 to a controller 50 located beside it. Controller 50 may be remotely located relative to crusher 100 . Further, the failure predictor diagnostic device 40 may be provided by a cloud service. In this case, a cloud server accessed by a specific computer functions as a failure predictor diagnostic device 40 by executing a predetermined program, and outputs a diagnostic result of a predictor of failure calculated based on the provided meshing vibration acceleration information. You can return it to your computer. Further, the calculated diagnosis result of the predictor of failure may be stored in a cloud server so as to be accessible from a specific computer. Similarly, control device 50 may be provided by a cloud service.

4: Eccentric sleeve 5: Main shaft 6: Bearing cylinder 8: Drive motor 9: Supply device 10: Main shaft bearing 11: Sleeve bearing 13: Mantle 14: Concave 15: Lower bearing 16: Crushing chamber 17: Upper bearing 19a: Bevel pinion 19b : Bevel gear 20 : Power transmission mechanism 21 : Horizontal shaft 25 : Horizontal shaft bearing 30 : Frame 31 : Upper frame 32 : Lower frame 40 : Failure sign diagnostic device 43 : Mesh vibration detector 44 : Bearing vibration detector 50 : Control device 100 : Spinning crusher

Claims (9)

A main shaft, a mantle fixed to the main shaft, a concave arranged to face the mantle and forming a crushing chamber between the mantle and the mantle, and an eccentric sleeve supporting a lower portion of the main shaft via a lower bearing. a drive motor for rotationally driving the eccentric sleeve; a horizontal shaft rotationally driven by the drive motor; a bevel pinion arranged on the horizontal shaft; and a bevel gear arranged on the eccentric sleeve and meshing with the bevel pinion. and a power transmission mechanism for transmitting the output of the drive motor to the eccentric sleeve, wherein
A meshing vibration acceleration generated by the meshing of the bevel pinion and the bevel gear is acquired, and a meshing vibration acceleration waveform in which the meshing vibration acceleration detected during a non-crushing load period in which no material to be crushed is supplied to the crushing chamber is arranged in time series is obtained. and diagnosing the presence or absence of a sign of failure based on the analysis result of the meshing vibration acceleration waveform;
Diagnosis device for predictive failure of rotary crusher. Obtaining the crushing load of the orbital crusher, regarding a period in which the crushing load is below a predetermined load threshold as the non-crushing load period, and sampling the meshing vibration acceleration during the non-crushing load period;
2. The device for diagnosing a sign of failure of a rotary crusher according to claim 1. FFT spectrum processing is performed on the meshing vibration acceleration waveform to obtain a total value of the spectrum of the entire analysis frequency band. is equal to or less than the diagnostic threshold, determining that no sign of failure was found;
3. The device for diagnosing a sign of failure of a rotary crusher according to claim 1 or 2. FFT spectrum processing is performed on the meshing vibration acceleration waveform to obtain a total value of spectra in a specific frequency band, and if the total value exceeds a predetermined diagnostic threshold, it is determined that a sign of failure has been found, and Determining that no sign of failure was found when the total value is less than or equal to a predetermined diagnostic threshold;
3. The device for diagnosing a sign of failure of a rotary crusher according to claim 1 or 2. A main shaft, a mantle fixed to the main shaft, a concave arranged to face the mantle and forming a crushing chamber between the mantle and the mantle, and an eccentric sleeve supporting a lower portion of the main shaft via a lower bearing. a drive motor for rotationally driving the eccentric sleeve; a horizontal shaft rotationally driven by the drive motor; a bevel pinion arranged on the horizontal shaft; and a bevel gear arranged on the eccentric sleeve and meshing with the bevel pinion. and a power transmission mechanism for transmitting the output of the drive motor to the eccentric sleeve, wherein
Acquiring meshing vibration acceleration caused by meshing of the bevel pinion and the bevel gear;
Obtaining a meshing vibration acceleration waveform in which the meshing vibration acceleration detected during a non-crushing load period in which no material to be crushed is supplied to the crushing chamber is arranged in time series;
diagnosing the presence or absence of a sign of failure based on the analysis result of the meshing vibration acceleration waveform;
Failure sign diagnosis method for gyration crusher. Obtaining a crushing load, regarding a period in which the crushing load is below a predetermined load threshold as the non-crushing load period, and sampling the meshing vibration acceleration during the non-crushing load period;
The method for diagnosing a sign of failure of a gyration crusher according to claim 5. Diagnosing the presence or absence of a sign of failure involves performing FFT spectrum processing on the meshing vibration acceleration waveform, obtaining a total value of the spectrum of the entire analysis frequency band, and determining a failure when the total value exceeds a predetermined diagnostic threshold. Determining that a sign of failure was found, and determining that no sign of failure was found when the sum is less than or equal to the diagnostic threshold;
The method for diagnosing a sign of failure of a rotary crusher according to claim 5 or 6. Diagnosing the presence or absence of a sign of failure is performed by performing FFT spectrum processing on the meshing vibration acceleration waveform, obtaining a total value of spectra in a certain specific frequency band, and when the total value exceeds a predetermined diagnostic threshold. determining that a sign of failure was found in and determining that no sign of failure was found if the sum is less than or equal to a predetermined diagnostic threshold;
The method for diagnosing a sign of failure of a rotary crusher according to claim 5 or 6. a main shaft;
a mantle fixed to the main shaft;
a concave disposed to face the mantle and forming a crushing chamber with the mantle;
an eccentric sleeve that supports a lower portion of the main shaft via a lower bearing;
a drive motor for rotationally driving the eccentric sleeve; a horizontal shaft rotationally driven by the drive motor; a bevel pinion arranged on the horizontal shaft; and a bevel gear arranged on the eccentric sleeve and meshing with the bevel pinion. , a power transmission mechanism for transmitting the output of the drive motor to the eccentric sleeve;
a meshing vibration detector that detects meshing vibration acceleration caused by meshing of the bevel pinion and the bevel gear;
A failure sign diagnosis device for a gyration crusher according to any one of claims 1 to 4,
Orbital crusher.

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