Abrasion estimation device, gyratory crusher, abrasion estimation program, and abrasion estimation method

Abstract

To easily estimate abrasion amounts of mantle or a concave, without requiring direct contact of the mantle and the concave.SOLUTION: A gyratory crusher includes mantle, a concave, and a lifting device. A lifting mechanism lifts at least one of the mantle and the concave by supply / discharge of working fluid. An abrasion estimation device for estimating the abrasion states of the mantle or the concave includes a calculation device. The calculation device estimates the abrasion states of the mantle or the concave, on the basis of the pressure of the working fluid in a state in which a crushing object is not supplied to a crushing chamber.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to the estimation of wear occurring in a gyratory crusher.

Background Art

[0002] Patent Document 1 discloses a gyratory crusher including a cone crusher, a gyratory crusher, etc.

[0003] The gyratory crusher of Patent Document 1 includes a mantle and a concave. A crushing chamber having a crushing gap is formed between the mantle and the concave. The mantle is attached to a main shaft. The lower part of the main shaft is inserted inside an eccentric sleeve. When the eccentric sleeve rotates, a swirling motion of the mantle is generated, and the raw material is crushed.

[0004] In Patent Document 1, the lower end of the main shaft is supported by a piston (ram) provided in a hydraulic cylinder. By raising and lowering the ram by the hydraulic pressure of the hydraulic oil, the mantle can move up and down in the height direction, and the aforementioned crushing gap can be changed.

[0005] The method for realizing a crushing gap of a predetermined size in Patent Document 1 is as follows. First, the ram is raised by driving the hydraulic cylinder. Eventually, the contact state between the mantle and the concave (in other words, the state where the crushing gap becomes zero) is detected. The displacement of the ram at this time is acquired by a displacement sensor and stored. Then, the ram is lowered again. The above process is repeated 6 times while changing the rotational phase of the mantle by a predetermined angle (60°). The average value of the displacement of the ram when the contact state is detected is calculated, and this average value is used as a reference value. By setting the ram to a state where it is lowered by a height based on the set crushing gap from the reference value, the crushing gap can be realized.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The configuration of the above Patent Document 1 is premised on the direct contact between the mantle and the concavity when the main shaft is raised. However, for example, among jaw crushers, there are those with a configuration where the mantle and the concavity do not come into contact even when the main shaft is raised. In the case of such a configuration, the method as in Patent Document 1 cannot be used.

[0008] In the configuration of Patent Document 1, considering the influence of uneven wear, the measurement cycle is repeated 6 times. However, repeating the measurement cycle requires a long time. Also, when extreme uneven wear occurs, it is not always possible to obtain a reference value with sufficient accuracy by repeating 6 times.

[0009] The present disclosure has been made in view of the above circumstances, and its object is to easily estimate the wear amount of the mantle or the concavity without the need to directly contact the mantle and the concavity.

Means for Solving the Problems

[0010] The problems to be solved by the present disclosure are as described above. Next, the means for solving these problems and their effects will be described.

[0011] According to a first aspect of the present disclosure, a wear estimation device having the following configuration is provided. That is, this wear estimation device estimates the wear state of the mantle or the concave in a gyratory crusher. The gyratory crusher crushes a crushing object supplied to a crushing chamber. The gyratory crusher includes a mantle, a concave, and a lifting device. The mantle rotates. The concave is disposed on the outer periphery of the mantle and forms the crushing chamber together with the mantle. The lifting device raises and lowers at least one of the mantle and the concave by supplying and discharging a working fluid. The wear estimation device includes an arithmetic unit. The arithmetic unit estimates the wear state of the mantle or the concave based on the pressure of the working fluid in a state where no crushing object is supplied to the crushing chamber.

[0012] According to a second aspect of the present disclosure, a wear estimation program having the following configuration is provided. That is, this wear estimation program estimates the wear state of the mantle or the concave in the above-described gyratory crusher. The wear estimation program causes an arithmetic unit to perform a process of estimating the wear state of the mantle or the concave based on the pressure of the working fluid in a state where no crushing object is supplied to the crushing chamber.

[0013] According to a third aspect of the present disclosure, the following wear estimation method is provided. That is, by this wear estimation method, the wear state of the mantle or the concave in the above-described gyratory crusher is estimated. In this wear estimation method, the wear state of the mantle or the concave is estimated based on the pressure of the working fluid in a state where no crushing object is supplied to the crushing chamber.

[0014] Thereby, it is possible to easily estimate the degree of wear of the mantle or the concave based on the pressure of the working fluid of the lifting device that raises and lowers the mantle or the concave without bringing the mantle and the concave into contact with each other.

Effects of the Invention

[0015] According to the present disclosure, it is possible to easily estimate the wear amount of the mantle or the concave without directly contacting the mantle and the concave.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0017] Next, with reference to the drawings, the disclosed embodiments will be described. FIG. 1 is a schematic side cross-sectional view showing the configuration of a rotary crusher 100 according to an embodiment of the present disclosure.

[0018] The rotary crusher 100 of the present embodiment shown in FIG. 1 can crush rocks and the like that are objects to be crushed. The rotary crusher 100 includes a main shaft 4, a mantle 5, a concave 6, an eccentric sleeve 7, a power transmission mechanism 20, a control device 50, and the like.

[0019] In the present embodiment, the wear estimation device 60 estimates the wear of the mantle 5 and the concave 6 provided in the rotary crusher 100. The wear estimation device 60 may be provided as a part of the rotary crusher 100, or may be provided as a device separate from the rotary crusher 100.

[0020] Hereinafter, the rotary crusher 100 will be specifically described.

[0021] The main shaft 4 is configured as a long shaft-shaped member. The main shaft 4 is housed inside the housing 13 provided in the rotary crusher 100. The main shaft 4 is disposed generally in the vertical direction and can perform a swirling motion about the upper end portion.

[0022] A mantle 5 is fixed to the outer peripheral surface of a main shaft 4. A concave 6 is fixed to the inner peripheral surface of a housing 13. The concave 6 is arranged so as to surround the outer periphery of the mantle 5. A ring-shaped space between the mantle 5 and the concave 6 functions as a crushing chamber 3.

[0023] A hopper 15 is provided at the upper part of the housing 13. An inlet through which rock can be introduced is formed in the hopper 15. The inlet is connected to the upper end portion of the crushing chamber 3.

[0024] The mantle 5 is formed in a generally conical shape with a larger diameter at the lower part. Therefore, the distance between the concave 6 and the mantle 5 gradually becomes narrower as going downward as shown in FIG. 1.

[0025] As the main shaft 4 rotates, the distance between the mantle 5 and the concave 6 periodically increases and decreases. As a result, a compressive force is applied to the rock inside the crushing chamber 3, and the rock can be crushed. Since the lower end portion of the crushing chamber 3 is open, the crushed rock falls downward from the crushing chamber 3.

[0026] Plate-like members are attached to the surfaces of the mantle 5 and the concave 6 facing the crushing chamber 3 side. The plate-like members are made of a hard and wear-resistant material such as high manganese steel. The plate-like members are structured to be removable so that they can be replaced when worn to a certain extent. In the following description, the replacement of the mantle 5 or the concave 6 generally means the replacement of the plate-like members in the mantle 5 or the concave 6. However, the entire mantle 5 or the concave 6 may be replaced.

[0027] An upper bearing 16 is arranged at the upper part of the housing 13 via a support member (not shown). This support member is sometimes called a spider. The upper bearing 16 rotatably supports the upper part of the main shaft 4. The upper bearing 16 is configured as a known sliding bearing (bush) or a spherical bearing or the like, and can change the angle of the axis of the main shaft 4.

[0028] The eccentric sleeve 7 is rotatably supported at the lower part of the housing 13 about the vertical axis. A through hole is formed in the eccentric sleeve 7.

[0029] The lower part of the main shaft 4 is supported by the lower bearing 8 while being inserted into the through hole of the eccentric sleeve 7. The lower bearing 8 is composed of a thrust bearing 8a and a radial bearing 8b. The thrust bearing 8a supports the lower end part of the main shaft 4. The radial bearing 8b is configured as a cylindrical bush disposed between the main shaft 4 and the eccentric sleeve 7.

[0030] A hydraulic cylinder (lifting device) 9 is provided at the lower part of the housing 13. The hydraulic cylinder 9 includes a piston 10 that can move up and down. The thrust bearing 8a is disposed on the upper surface of the piston 10.

[0031] With this configuration, the hydraulic cylinder 9 supports the self-weights of the main shaft 4 and the mantle 5. In other words, a downward load including the self-weights of the main shaft 4 and the mantle 5 acts on the piston 10. When rocks are fed into the crushing chamber 3, at least a part of the crushing load and the self-weight of the rocks are added to the load acting on the piston 10.

[0032] In the hydraulic cylinder 9, an oil chamber 11 is formed below the piston 10. The oil chamber 11 is connected to an accumulator 17 and a hydraulic device 18 via a pipe 12.

[0033] By supplying and discharging hydraulic oil to and from the oil chamber 11, the main shaft 4 and the mantle 5 can be moved up and down via the piston 10. For example, when wear occurs in the mantle 5 and the concave 6, the interval of the crushing chamber 3 (the interval between the mantle 5 and the concave 6) becomes larger. By raising the mantle 5 so as to compensate for that amount, the interval of the crushing chamber 3 can be maintained at a predetermined value.

[0034] The accumulator 17 has a known configuration that utilizes a compressible fluid (e.g., air). The accumulator 17 can maintain the pressure in the oil chamber 11 against fluctuations in the load acting on the piston 10.

[0035] The hydraulic device 18 includes a hydraulic pump 41, a motor 42, and a solenoid valve 43.

[0036] The hydraulic pump 41 is driven by the motor 42 and sucks hydraulic oil (working fluid) from the oil reservoir. The solenoid valve 43 can switch between a state in which the hydraulic oil is discharged from the hydraulic pump 41 to the oil chamber 11 via the pipe 12 and a state in which the hydraulic oil is discharged from the oil chamber 11 to the oil reservoir via the pipe 12. By switching the solenoid valve 43, the piston 10 can be raised or lowered.

[0037] The eccentric sleeve 7 is rotationally driven by a power transmission mechanism 20 described later. The through hole of the eccentric sleeve 7 is circularly configured and is arranged eccentrically with respect to the rotation axis of the eccentric sleeve 7. The aforementioned radial bearing 8b is arranged between the main shaft 4 and the inner peripheral surface of the through hole of the eccentric sleeve 7. Thereby, the main shaft 4 is inserted into the eccentric sleeve 7 in a state where it can rotate relative to the through hole.

[0038] The power transmission mechanism 20 transmits the power of the motor 31 for rotating the eccentric sleeve 7 to the eccentric sleeve 7. The power transmission mechanism 20 includes a belt 21, a transmission shaft 22, a bevel pinion 23, and a bevel gear 24, etc.

[0039] The belt 21 is configured as, for example, a V-belt. The belt 21 transmits the power of the motor 31, which is the driving source, to the transmission shaft 22.

[0040] The bevel pinion 23 is fixed to the end of the transmission shaft 22. The bevel gear 24 is fixed to the outer periphery of the lower end of the eccentric sleeve 7. The bevel gear 24 meshes with the bevel pinion 23. As a result, the power of the motor 31 is transmitted to the bevel gear 24, and the eccentric sleeve 7 rotates.

[0041] Due to the rotation of the eccentric sleeve 7, the lower end of the main shaft 4 moves so as to pivot within the virtual horizontal plane. As a result, the main shaft 4 performs a pivoting motion about the upper bearing 16 so as to sequentially change the direction of its axis.

[0042] The control device 50 controls the rotary crusher 100. The control device 50 is composed of known hardware such as an arithmetic device and a storage device.

[0043] The control device 50 controls, for example, the motor 42 of the hydraulic device 18 and the solenoid valve 43, etc. Thereby, the rock fed into the rotary crusher 100 can be crushed so as to have an appropriate particle size. The motor 31 for driving the eccentric sleeve 7 may be controlled by the control device 50.

[0044] The rotary crusher 100 is provided with a lifting operation member (not shown). The lifting operation member is configured, for example, as an up button and a down button. This lifting operation member is electrically connected to the control device 50. When the operator operates the up button, the control device 50 switches the solenoid valve 43 to supply hydraulic oil to the oil chamber 11, raising the main shaft 4 and the mantle 5. When the operator operates the down button, the control device 50 switches the solenoid valve 43 to discharge the hydraulic oil from the oil chamber 11, lowering the main shaft 4 and the mantle 5. Thereby, the manual adjustment of the interval of the crushing chamber 3 can be performed.

[0045] The rotary crusher 100 is provided with a pressure sensor 19 for detecting the pressure of the pipe 12. The pressure sensor 19 is electrically connected to the control device 50. The control device 50 monitors the pressure detected by the pressure sensor 19 and, for example, when the pressure detected by the pressure sensor 19 is excessive during the crushing operation, the main shaft 4 and the mantle 5 can be temporarily lowered to increase the interval of the crushing chamber 3. By this control, it is possible to prevent the state where the crushing load is large from continuing for a long time.

[0046] The control device 50 can acquire the detected value of the pressure sensor 19 in a state where the machine is stopped. Hereinafter, the state where the machine is stopped may be referred to as the crusher stop state. Specifically, this crusher stop state means that the rotation of the eccentric sleeve 7 is stopped and there is no rock in the crushing chamber 3.

[0047] In a state where rock crushing is being performed, the piston 10 supports, in addition to the weights of the main shaft 4, the mantle 5, and the rock, the downward component of the crushing pressure generated in the crushing chamber 3. Therefore, the pressure in the oil chamber 11 fluctuates greatly. On the other hand, in the crusher stop state, since the load of the rock and the crushing pressure do not occur, the weights of the main shaft 4 and the mantle 5 are stably reflected in the pressure of the oil chamber 11.

[0048] When the mantle 5 wears, its weight decreases, so the pressure in the oil chamber 11 in the hydraulic cylinder 9 decreases. Therefore, when the detected value of the pressure sensor 19 in the crushing stop state is acquired at a certain timing, if the obtained detected value is less than the value in the new state of the mantle 5, this decrease can be considered to reflect the weight decrease due to the wear of the mantle 5.

[0049] The wear estimation device 60 is configured by known hardware such as an arithmetic device 61 and a storage device 62, similar to the control device 50. The wear estimation device 60 is connected to the control device 50 via a WAN or LAN or the like and can exchange information. The wear estimation device 60 can estimate the amount of wear that has occurred on the mantle 5.

[0050] The wear estimation device 60 acquires and stores from the control device 50 the detected value of the pressure sensor 19 obtained by the control device 50 in the crushing stop state when the mantle 5 is in a new state. Thereafter, the control device 50 acquires the detected value of the pressure sensor 19 in the crushing stop state at regular or irregular timings. The wear estimation device 60 acquires and stores the detected value of the pressure sensor 19 from the control device 50 each time. Based on the transition of the detected value of the pressure sensor 19, the transition of the wear amount of the mantle 5 can be estimated.

[0051] The arithmetic unit 61 of the wear estimation device 60 calculates a predetermined threshold value corresponding to a state where the wear of the mantle 5 has progressed considerably, based on the detected value of the pressure sensor 19 when the mantle 5 is in a new state. The calculated threshold value is stored in the storage device 62. Thereafter, when the pressure in the oil chamber 11 detected by the pressure sensor 19 falls below this threshold value, the wear estimation device 60 can notify by displaying a message on a display (for example, a display connected to the control device 50) not shown. Thereby, it is possible to prompt the surroundings to perform maintenance work (typically, replacement of the mantle 5).

[0052] FIG. 2 shows a functional block diagram of the wear estimation device 60. As shown in FIG. 2, the wear estimation device 60 includes a pressure acquisition unit 71, a threshold storage unit 72, a determination unit 73, a notification output unit (notification unit) 74, a threshold arrival time prediction unit (maintenance time prediction unit) 75, and a threshold arrival time output unit (predicted time output unit) 76.

[0053] Specifically, a wear estimation program for executing the wear estimation method of the present disclosure is stored in the storage device 62 included in the wear estimation device 60. By the cooperation of hardware such as the arithmetic unit 61 and the storage device 62 and the above software, the wear estimation device 60 can be operated as the pressure acquisition unit 71, the threshold storage unit 72, the determination unit 73, the notification output unit 74, the threshold arrival time prediction unit 75, the threshold arrival time output unit 76, and the like.

[0054] The pressure acquisition unit 71 acquires the detected value of the pressure sensor 19 acquired by the control device 50 in the crushing stop state from the control device 50.

[0055] The threshold storage unit 72 stores a threshold value related to the detected value of the pressure sensor 19 corresponding to a situation where the wear has progressed to a predetermined extent. This threshold value can be determined, for example, to correspond to the case where the wear has progressed to the extent that the mantle 5 should be replaced. The threshold value may be determined by calculation or empirically based on experimental results.

[0056] The determination unit 73 compares the detected value of the pressure sensor 19 acquired by the pressure acquisition unit 71 with the above-described threshold value, and determines whether to issue a notification regarding the wear of the mantle 5.

[0057] When it is determined in the determination unit 73 that a notification is to be issued, the notification output unit 74 issues a notification by an appropriate means. Regardless of the form of the notification, for example, it can be issued by visual display or voice.

[0058] When the detected value of the pressure sensor 19 exceeds the threshold value, the threshold arrival time prediction unit 75 predicts the time when the detected value of the pressure sensor 19 becomes equal to or less than the threshold value based on the trend of the detected value.

[0059] For example, when a plurality of acquisition results are plotted on a graph with the number of elapsed days on the first axis and the detected value of the pressure sensor 19 on the second axis, a trend line can be grasped from this plot result. The trend line can be obtained by a known calculation method, for example, the least squares method. The threshold arrival time prediction unit 75 can estimate the time when the trend line becomes equal to or less than the above-described threshold value as the time when the mantle 5 needs to be replaced. It may take a long time (for example, about 1 to 2 months) to obtain the plate-like member of the mantle 5. Therefore, it is particularly effective to be able to predict the future time when the mantle 5 should be replaced.

[0060] The threshold arrival time output unit 76 outputs the time predicted by the threshold arrival time prediction unit 75 by an appropriate method such as displaying it on a display (not shown).

[0061] Hereinafter, an example of the process performed by the wear estimation device 60 will be described with reference to the flowchart of FIG. 3.

[0062] The wear estimation device 60 acquires in advance from the control device 50 the detected value of the pressure sensor 19 in the crushing stop state when the mantle 5 is new (step S101). Based on this detected value, a threshold value is calculated and stored in the threshold value storage unit 72 (step S102).

[0063] Next, the wear estimation device 60 waits until an appropriate detection timing (step S103). After that, the pressure acquisition unit 71 acquires the detected value of the pressure sensor 19 in the crushing stop state from the control device 50 (step S104).

[0064] Subsequently, the determination unit 73 compares the detected value acquired in step S104 with the threshold value (step S105). If the detected value is less than or equal to the threshold value, it means that the wear has progressed to the extent that the mantle 5 should be replaced, so the notification output unit 74 outputs a notification in an appropriate format (step S106). Then, the process ends.

[0065] If the detected value exceeds the threshold value in the determination of step S105, the threshold arrival time prediction unit 75 predicts the time when the detected value will be less than or equal to the threshold value (step S107). The predicted time is output by the threshold arrival time output unit 76 in the form of a message such as "The predicted replacement time of the mantle is 60 days later" (step S108). Then, the process returns to step S103.

[0066] Through the above processing, the wear estimation device 60 can estimate the wear amount of the mantle 5 based on the pressure of the hydraulic oil in the hydraulic cylinder 9 and notify when the wear progress reaches a predetermined level. Since it is not necessary to directly contact the mantle 5 and the concavity 6 as in the aforementioned Patent Document 1, the degree of wear can be obtained without problems even when the contact between the mantle 5 and the concavity 6 is structurally impossible. Also, since it is not necessary to actually raise and lower the main shaft 4 and the mantle 5, the degree of wear can be grasped quickly. Furthermore, even if there is a bias in the wear of the mantle 5, the overall wear progress can be appropriately obtained. Also, since the degree of wear is estimated using the hydraulic oil of the hydraulic cylinder 9, it is not necessary to significantly change the configuration of the rotary crusher 100. Therefore, it is easy to apply to existing rotary crushers.

[0067] As described above, the wear estimation device 60 of the present embodiment estimates the wear state of the mantle 5 in the gyratory crusher 100. The gyratory crusher 100 crushes the rock supplied to the crushing chamber 3. The gyratory crusher 100 includes a mantle 5, a concave 6, and a hydraulic cylinder 9. The mantle 5 rotates. The concave 6 is disposed on the outer periphery of the mantle 5 and forms the crushing chamber 3 together with the mantle 5. The hydraulic cylinder 9 raises and lowers the mantle 5 by supplying and discharging hydraulic oil. The wear estimation device 60 includes an arithmetic unit 61. The arithmetic unit 61 estimates the wear state of the mantle 5 based on the pressure of the hydraulic oil in a state where no rock is supplied to the crushing chamber 3.

[0068] Thereby, the degree of wear of the mantle 5 can be easily estimated without bringing the mantle 5 into contact with the concave 6.

[0069] In the gyratory crusher 100 of the present embodiment, the mantle 5 is attached to the main shaft 4. The hydraulic cylinder 9 raises and lowers the mantle 5 together with the main shaft 4. The gyratory crusher 100 includes an eccentric sleeve 7 that rotates to swing the axis of the main shaft 4. The arithmetic unit 61 of the wear estimation device 60 estimates the wear state of the mantle 5 based on the pressure of the hydraulic oil in a state where no rock is supplied to the crushing chamber 3 and the rotation of the eccentric sleeve 7 has stopped.

[0070] Thereby, the degree of wear of the mantle 5 can be estimated based on the pressure of the hydraulic oil in a stable state.

[0071] The wear estimation device 60 of the present embodiment includes a notification output unit 74 that notifies when the wear estimated based on the pressure of the hydraulic oil has progressed by a predetermined amount or more.

[0072] Thereby, for example, an operator can easily notice that the wear of the mantle 5 has progressed.

[0073] The wear estimation device 60 of the present embodiment includes a threshold arrival time prediction unit 75 that predicts the future maintenance time of the mantle 5 based on the transition of the pressure of the hydraulic oil.

[0074] This enables the preparation for the maintenance work of the mantle 5 to be started at an appropriate timing based on the prediction of the maintenance timing.

[0075] Next, a modification of the above embodiment will be described. In the description of this modification, members that are the same as or similar to those in the aforementioned embodiment may be denoted by the same reference numerals in the drawings, and the description may be omitted.

[0076] In the rotary crusher 100x of this modification, the interval of the crushing chamber 3 can be changed by raising and lowering the concave 6 instead of the mantle 5. The concave 6 is provided so as to be vertically movable with respect to the housing 13x via a ring-shaped cylinder 9x. The cylinder 9x can raise and lower the concave 6 by supplying and discharging hydraulic oil.

[0077] In this modification, the wear estimation device 60 can estimate the wear amount of the concave 6 based on the detected value of the pressure sensor 19.

[0078] Although the preferred embodiments of the present disclosure have been described above, the above configuration can be changed as follows, for example. The changes may be made individually or a plurality of changes may be arbitrarily combined.

[0079] In step S105 of the flowchart in FIG. 3, the pressure detection value is directly compared with the threshold value. Instead of this, for example, the pressure detection value can be converted into the weights of the main shaft 4 and the mantle 5 using an appropriate calculation formula, and this weight can be compared with the threshold value. Also, the difference between the pressure detection value when the mantle 5 is new and the current pressure detection value can be converted into the wear amount of the mantle 5, and this wear amount can be compared with the threshold value.

[0080] The processes of step S107 and step S108 can also be omitted.

[0081] In the foregoing description, the detected value of the pressure sensor 19 in the state where there is no rock in the crushing chamber 3 and the rotation of the eccentric sleeve 7 has stopped is used for the estimation of wear. However, if there is no rock in the crushing chamber 3, the detected value of the pressure sensor 19 in the state where the eccentric sleeve 7 is rotating may be used.

[0082] Combining the embodiment of FIG. 1 and the modification of FIG. 4, the respective weights of the mantle 5 and the concave 6 can also be configured to be supported by separate hydraulic cylinders.

[0083] The pressure sensor 19 may be electrically connected to the wear estimation device 60, and the wear estimation device 60 may directly acquire the detected value of the pressure sensor 19.

[0084] The hydraulic cylinder 9 in the embodiment of FIG. 1 can also be configured as a double-acting cylinder instead of a single-acting cylinder. The same applies to the modification of FIG. 4.

[0085] Based on the wear amount of the mantle 5 estimated based on the detected value of the pressure sensor 19, the control device 50 can also be configured to automatically adjust the gap of the crushing chamber 3.

[0086] The wear estimation device 60 can also be realized by the same hardware as the control device 50. The wear estimation device 60 can also be realized, for example, in a computer constituting a cloud service.

Explanation of Reference Numerals

[0087] 3 Crushing chamber 4 Main shaft 5 Mantle 6 Concave 7 Eccentric sleeve 9 Hydraulic cylinder (lifting device) 19 Pressure sensor 60 Wear estimation device 61 Arithmetic device 100 Rotary crusher

Claims

1. A rotating mantle, a concave disposed on the outer periphery of the mantle and forming a crushing chamber together with the mantle, a lifting device for lifting at least one of the mantle and the concave by supplying and discharging a working fluid, and comprising, a wear estimation device for estimating the wear state of the mantle or the concave in a rotary crusher for crushing an object to be crushed supplied to the crushing chamber, comprising an arithmetic unit, the arithmetic unit estimates the wear state of the mantle or the concave based on the pressure of the working fluid in a state where no object to be crushed is supplied to the crushing chamber. A wear estimation device.

2. The wear estimation device according to claim 1, wherein the rotary crusher, a main shaft to which the mantle is attached, an eccentric sleeve that rotates to swing the axis of the main shaft, and comprising, the lifting device is configured to lift and lower the mantle together with the main shaft, the arithmetic unit estimates the wear state of the mantle based on the pressure of the working fluid in a state where no object to be crushed is supplied to the crushing chamber and the rotation of the eccentric sleeve has stopped. A wear estimation device.

3. The wear estimation device according to claim 1 or 2, comprising a notification unit that notifies when the wear estimated based on the pressure of the working fluid has progressed beyond a predetermined level. A wear estimation device.

4. The wear estimation device according to claim 1 or 2, comprising a maintenance time prediction unit that predicts the future maintenance time of the mantle or the concave based on the change in the pressure of the working fluid. A wear estimation device.

5. A rotary crusher comprising the wear estimation device according to claim 1 or 2.

6. A rotating mantle, a concave disposed on the outer periphery of the mantle and forming a crushing chamber together with the mantle, a lifting device for lifting at least one of the mantle and the concave by supplying and discharging a working fluid, and comprising, a wear estimation program for estimating the wear state of the mantle or the concave in a rotary crusher for crushing an object to be crushed supplied to the crushing chamber, causing an arithmetic unit to perform a process of estimating the wear state of the mantle or the concave based on the pressure of the working fluid in a state where no object to be crushed is supplied to the crushing chamber. A wear estimation program.

7. A rotating mantle, A concavity disposed on the outer periphery of the mantle and forming a crushing chamber together with the mantle; A lifting device that raises and lowers at least one of the mantle and the concavity by supplying and discharging a working fluid; Comprising: A wear estimation method for estimating the wear state of the mantle or the concavity in a rotary crusher that crushes an object to be crushed supplied to the crushing chamber, The wear estimation method for estimating the wear state of the mantle or the concavity based on the pressure of the working fluid in a state where no object to be crushed is supplied to the crushing chamber.

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