JP3145819B2 - Overload detection device and crushed material partial supply detection device in cone crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overload condition detecting device and method for a cone crusher having a spherical thrust bearing for supporting a spindle assembly head for eccentric oscillating motion as a hydrostatic bearing by the action of lubricating oil. The present invention relates to a crushed material partial supply state detection device.

[0002]

2. Description of the Related Art In a cone crusher used for producing a crushed stone by crushing a rough stone to be crushed, a cone crusher 50 having a spherical thrust bearing includes:
FIG. 1 of a cross-sectional view showing the configuration thereof is known. In the figure, reference numeral 51 denotes a lower fuselage frame; 52, a main shaft assembly head having a cone shaft (cone center) 52b and a mantle 52c fixed to a main shaft 52a and having an overall umbrella shape; Reference numeral 53 denotes a thrust support fixed to the upper inside of the lower fuselage frame 51. The thrust support 53 has five oil ejection holes A1 to A5 in this example to be described later. An annular spherical thrust bearing 54 having a spherical surface (concave curved surface) corresponding to the lower surface of the cone head 52b is fixed. The spherical thrust bearing 54
Lubricating oil is supplied at a high pressure from the oil ejection holes A1 to A5 to the lower surface of the cone head, and the spindle assembly head 52 is supported by the lubricating oil pressure action.

[0005] Reference numeral 55 denotes an eccentric shaft. The eccentric shaft 55 has a large bevel gear 55a attached thereto and a lower fuselage frame 51.
It is rotatably supported by a bearing 56 provided at the bottom of the. As shown in the figure, in the upper concave space of the eccentric shaft 55, the lower portion of the main shaft 52a of the main shaft assembly head 52 is fitted with the main shaft 52a.
Is accommodated in a state where it is obliquely displaced with respect to the axis B of the lower body frame 51 and the eccentric shaft 55, and the inner peripheral surface of the annular wall forming the upper concave space of the eccentric shaft 55 and the main shaft 52a. An eccentric bearing (double-row cylindrical roller bearing) 57 is provided between them. A lower fuselage bearing (self-aligning roller bearing) 59 is provided between the outer peripheral surface of the annular wall of the eccentric shaft 55 and the lower fuselage frame 51 via a bearing fastening retainer 58 fixed to the lower fuselage frame 51. Is provided. The axis B of the eccentric shaft 55, that is, the axis B of the body and the axis A of the main shaft 52a intersect at an eccentric center point C located above the main spindle assembly head 52.

Reference numeral 60 denotes a horizontal shaft. A bevel gear 60a meshing with the large bevel gear 55a of the eccentric shaft 55 is attached to one end of the horizontal shaft 60, and a V-belt wheel 60b is attached to the other end. Reference numeral 61 denotes an upper body frame assembled on the lower body frame 51 via an upper body support. The upper body frame 61 is covered between the mantle 52c via a cone cable support. An annular cone cable 62 having a “C” -shaped cross section for crushing the crushed material is fixed. 63 is a supply hopper. The rough stones to be crushed are Corn Cave 62 and the mantle
Supply hopper to the crushing chamber, which is the space formed between
It is designed to be supplied by dropping from 63.

FIG. 2 is a partially omitted top view of the spherical thrust bearing shown in FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG. As shown in FIG. 2, in this example, reference numerals A1 to A5 are provided at respective positions obtained by dividing the circumference into five equal parts, as shown in FIG.
Are provided with a total of five oil ejection holes to which lubricating oil is supplied at high pressure. However, in FIG.
A4 and A5 are not shown. These oil outlets A1
As shown in FIGS. 2 and 3, on the upper surface of the spherical thrust bearing 54 provided with .about.A5, that is, the surface on which the spherical surface (concave curved surface) corresponding to the lower surface of the cone head of the spindle assembly head 52 is formed. Grooves 54a and 54b are provided. An oil recovery hole 54c communicates with the annular oil groove 54b on the outer peripheral side. The oil jet holes A1 to A5 of the spherical thrust bearing 54 are supplied with high-pressure lubricating oil from a flow divider (not shown) through independent pipes connected to the respective oil jet holes A1 to A5. .

Next, the operation will be described. The V-belt wheel 60b is driven by a motor (not shown) to rotate the horizontal shaft 60, thereby rotating the eccentric shaft 55 via the large bevel gear 55a. When the eccentric shaft 55 rotates, the axis B of the eccentric shaft 55 (the axis of the machine body) and the axis A of the main shaft 52a are shifted so as to intersect at an eccentric center point C located above the main spindle assembly head 52. For this reason, the spindle assembling head 52 performs an eccentric oscillating motion, which is a "sliding motion". In this case, when viewed in a cross-sectional view, the movement of the spindle assembly head 52 is a swinging movement. Due to this eccentric pivoting motion of the spindle assembly head 52, the gap between the cone cable 62 and the mantle 52c is reduced,
The ore supplied to the crushing chamber is repeatedly crushed when the gap becomes small, and moves downward along the inclination of the mantle 52c when the gap becomes large. Such an operation is repeated several times and a predetermined particle size is discharged out of the apparatus.

The number of eccentric oscillating movements of the spindle assembly head 52 (the number of oscillating movements when viewed in a sectional view) varies depending on the machine size, but is about 240 to 360 times / minute. In addition,
While the object to be crushed is being crushed, the spindle assembling head 52 itself rotates at a rate of about 10 to 15 times / minute due to the reaction force for crushing the object to be crushed.

[0008]

In the above-mentioned cone crusher provided with a spherical thrust bearing for supporting a main shaft assembly head that performs eccentric oscillating motion, the material to be crushed is excessively supplied, resulting in an overload condition, or If the material to be crushed is not evenly supplied to the crushing chamber and the crushed material is supplied unevenly to a specific location of the crushing chamber, a large load is applied to the spherical thrust bearing and the eccentric bearing of the cone crusher, This is the cause of those failures. Therefore, it is required to be able to detect whether the cone crusher is operating in an overload state or to detect whether the cone crusher is operating in a state in which the crushed material is unbalancedly supplied. ing.

According to the present invention, lubricating oil is supplied at a high pressure from a plurality of oil ejection holes to a lower surface of a cone head of a spindle assembly head having a mantle, and eccentrically oscillates by the lubricating oil pressure action. In a cone crusher equipped with a spherical thrust bearing that supports the spindle assembly head, the spherical thrust bearing and the eccentric bearing due to excessive supply of the crushed material to the cone crusher or uneven supply of the crushed material are prevented, and the spherical surface is prevented. An object of the present invention is to provide an overload state detecting device and a crushed object uneven supply state detecting device in a cone crusher, which can prevent a decrease in the operation rate of the cone crusher due to a failure of a thrust bearing or an eccentric bearing.

[0010]

In order to achieve the above object, the present invention provides an overload detecting apparatus for a cone crusher , comprising: a spindle assembly head having a cone head and a mantle fixed to a spindle; and a spindle assembly head. A spherical thrust bearing that supplies the lubricating oil at a high pressure from a plurality of oil ejection holes between the lower surface of the head and the cone head and supports the main spindle assembly head by a lubricating oil pressure action; An overload state detecting device in a cone crusher for crushing an object to be crushed between a cone cave and the mantle by performing eccentric oscillating motion, the device being connected to each of the plurality of oil ejection holes of the spherical thrust bearing. Pressure sensors for respectively detecting the line pressure of the lubricating oil supplied through the respective pipelines, and the respective pressures
Comparison result between output from sensor and predetermined set value
Based on the overload determination processing for issuing an alarm indicating that the command reducing the crush material supply to the cone crusher, or corn crusher is operated under overload conditions
And a device .

[0011] Further, according to the present invention, there is provided a device for detecting an uneven supply state of a crushed object in a cone crusher, comprising: a spindle assembly head having a cone head and a mantle fixed to a spindle;
Between the spindle assembly head and the cone head underside .
A spherical thrust bearing that supplies the lubricating oil at a high pressure from the oil ejection hole and supports the main spindle assembly head by the lubricating oil pressure action, and the cone shaft and the mantle are rotated by eccentrically rotating the main spindle assembly head. A crushed object biased supply state detection device in a cone crusher that crushes the crushed object between the plurality of oil ejection holes of the spherical thrust bearing is supplied through each pipe line. Pressure sensors for respectively detecting the line pressure of the lubricating oil, and the pressure sensors for a predetermined period
Determine the maximum value or average value for each output from, the maximum value maximum difference indicating the maximum of those differences in each of the maximum values, or the average value maximum difference indicating the maximum of those differences in each of the average values Based on a comparison result between the maximum value maximum difference or the average value maximum difference and a predetermined setting value.
A partial supply determination processing device that issues an alarm indicating that the cone crusher is operating in the partial supply of the crushed material;
It is characterized by having.

[0012]

In the cone crusher having the above-mentioned spherical thrust bearing, a plurality of spindle assembly heads, which receive a crushing load between the cone thrust bearing and the cone cave, are provided between the spherical thrust bearing and the lower surface of the cone head of the spindle assembly head. The lubricating oil is supplied at a high pressure from the oil ejection hole, and is supported by the lubricating oil pressure action. Therefore, the line pressure (lubricating oil line pressure) of the lubricating oil supplied to the plurality of oil ejection holes of the spherical thrust bearing through the respective lines connected to the plurality of oil discharging holes reflects the load state of the cone crusher. Become.

Since the spherical thrust bearing is provided with a plurality of oil ejection holes at predetermined intervals along the circumferential direction, each of the plurality of oil ejection holes is connected to each of the plurality of oil ejection holes. The line pressure of the lubricating oil supplied through the passage varies with the phase of the eccentric oscillating motion of the spindle assembling head performed at about 240 to 360 times / minute and having a phase difference determined at the predetermined interval from each other. Will do. FIG. 4 is a diagram for explaining how the line pressure of the lubricating oil supplied to the plurality of oil ejection holes of the spherical thrust bearing through respective pipelines connected thereto is changed. In FIG. 4, for example, one at each position where the circumference is divided into four equal parts,
In the case where a total of four oil ejection holes A1 'to A4' are provided,
The graph shows changes in the line pressures P1 'to P4' of the lubricating oil supplied to the oil ejection holes A1 'to A4'. For example, the lubricating oil line pressure P1 'takes a maximum value when the gap between the mantle portion corresponding to the oil ejection hole A1' and the cone cave is minimized, and conversely, the gap between the mantle portion and the cone cave is reduced. Indicates a change that takes the minimum value when it reaches the maximum. The same applies to the lubricating oil line pressures P2 'to P4' for the other oil ejection holes A2 'to A4'.

Therefore, when the cone crusher is operated in an overload state, each oil of the spherical thrust bearing
The lubricating oil line pressure for each injection hole is operated under a steady load.
It is larger than the case where it is . In the overload state detecting device according to the present invention, the line pressure of the lubricating oil supplied through each of the pipelines connected to each of the plurality of oil ejection holes of the spherical thrust bearing is detected by the pressure sensor. Then, the overload determination processing device performs
Comparison between the output from the force sensor and a predetermined set value
Whether the cone crusher is overloaded based on the results
Has been determined. That is, every time a predetermined period elapses,
In the above-mentioned predetermined period in the whole output from each pressure sensor
The maximum value or the average value is obtained and the maximum value or the average value is compared with a predetermined set value, and the state where the maximum value or the average value exceeds the set value includes one time. If the cone crusher is continuously operated, it is determined that the cone crusher is operating in an overload state, and an alarm indicating the fact or a command to reduce the amount of crushed material supplied to the cone crusher is issued. Thereby, it is possible to detect that the cone crusher is in an overload state, and to reduce the supply amount of the crushed material by the cutting feeder in the previous stage of the cone crusher by the operator who has learned that the alarm is in the overload state. In this case, the overload state of the cone crusher is eliminated by performing the automatic reduction control according to the command.

On the other hand, when the cone crusher is operated in the state in which the crushed object is not uniformly supplied, it is different from the case in which the cone crusher is operated in the state in which the crushed object is uniformly supplied. The maximum value or the average value of the lubricating oil line pressure for a specific oil ejection port during a predetermined period is
It is significantly larger than that of the other oil ejection holes in the predetermined period. In the crushed material uneven supply state detecting device according to the present invention, the line pressure of the lubricating oil supplied to the plurality of oil ejection holes of the spherical thrust bearing through the respective pipelines connected to them is respectively detected by the pressure sensors. . Then, every time a predetermined period elapses, the maximum value or average value in the predetermined period for each output from each of the pressure sensors is obtained by the partial supply determination processing device , and the maximum value indicating the maximum of the difference between the maximum values is obtained. The maximum difference or the average value maximum difference indicating the maximum of those differences in each of the average values is determined, the maximum value maximum difference or the average maximum difference is compared with a predetermined set value, and the comparison result is obtained.
Determine whether or not uneven supply of crushed material is occurring based on
are doing. That is, the obtained maximum value maximum difference or
Comparing the average value maximum difference with a predetermined set value, the maximum value maximum difference or the average of the lubricating oil line pressure between a pair of the same oil ejection holes among the plurality of oil ejection holes. When the state in which the maximum value difference exceeds the set value is continued for a predetermined number of times including once, it is determined that the cone crusher is operated in the state in which the crushed material is partially supplied, and an alarm indicating the fact is issued. . With this, it is possible to detect that the material to be crushed is in an uneven supply state, and, by an operator who knows that the material to be crushed is in an uneven supply state, adjust the position of the supply chute above the supply hopper of the cone crusher. Is performed, the partial supply of the material to be crushed to the cone crusher is eliminated.

An embodiment of the present invention will be described below. Figure 5 is a diagram showing the overall configuration of the application of the overload condition detection apparatus according to the present invention in a cone crusher, Figure 6 is connected to the oil ejection hole of the spherical thrust bearing cone crusher definitive 5 (FIG. 1) that conduit diagram for explaining FIG. 7 is a block diagram of a definitive overload determination processing unit in FIG.

In FIG. 5, reference numeral 50 denotes a cone crusher whose configuration is shown in FIG. As described above, the cone crusher 50 is configured such that the spindle assembly head 52 that performs eccentric oscillating motion is moved by the spherical thrust bearing 54 to the spindle assembly head 52.
Five oil ejection holes A1 described above between the lower surface of the cone head
To A5, lubricating oil is supplied at a high pressure and is supported by the lubricating oil pressure action. Numeral 64 denotes a lubricating oil tank from which high-pressure lubricating oil is sent from a lubricating oil tank 64 by a pump 65 to a flow divider 67 via a filter 66, and as shown in FIG. The high-pressure lubricating oil is supplied from the flow divider 67 to the five oil ejection holes A1 to A5 through the respective pipelines L1 to L5 connected to them.

The five oil ejection holes A1 to A5 of the spherical thrust bearing 54
In order to detect the line pressure of the lubricating oil supplied to each of the A5s, a total of five pressure sensors S1 to S5 are provided, one for each of the respective pipelines L1 to L5. . The output indicating the lubricating oil line pressure from each of the oil ejection holes A1 to A5 from the pressure sensors S1 to S5 is an overload judgment described later.
It is provided to the constant processing device 10. In addition, cone crusher 50
, A rough stone (not shown) is supplied from a rough hopper 80 via a cut-out feeder 81, a belt conveyor 82, and a supply chute 83.

The cone crusher 50 is the overload to detect on the basis of whether it is operated in output indicating lubricating oil line pressure from the pressure sensor S1~S5 overload conditions
As shown in FIG. 7, the load determination processing device 10 includes an analog multiplexer 11, an A / D converter 12, a CPU 13, a ROM 14 storing a program, a RAM 15 storing determination data, and an output interface 16. When an output indicating the lubricating oil line pressure from each of the pressure sensors S1 to S5 is input, it is determined whether or not the cone crusher 50 is in an overload state by a procedure described later, and the cone crusher 50 is operated in an overload state. In the meantime, a rough stone supply amount reduction command for reducing the rough stone supply amount by a predetermined amount is given to the cutout feeder 81. Further, when the vehicle is driven in an overload state, an alarm may be issued to turn on the alarm indicator lamp 17.

In the overload determination processing device 10, five outputs indicating the lubricating oil line pressure from each of the pressure sensors S1 to S5 are input to the multiplexer 11 and sequentially transmitted to the A / D converter 12 one by one. Is done. High-speed switching of the channel of the multiplexer 11 by about several milliseconds is performed by a command from the CPU 13. The output of the multiplexer 11 is A
The signals are converted into digital signals by the / D converter 12 and are stored in the RAM 15 under the control of the CPU 13 as lubricating oil line pressure data P1 to P5 indicating the lubricating oil line pressures for the oil ejection holes A1 to A5. The setting value R _M as the determination data, R _A is stored in advance in RAM 15.

In the overload judgment processing device 10, each pressure sensor
The output indicating the lubricating oil line pressure from S1 to S5, that is, the lubricating oil line pressure data P1 to P5 is at least one cycle or more of the eccentric oscillating motion performed by the spindle assembly head 52 at about 240 to 360 times / minute. After the period t is read and the overload determination process described later is performed, the next period t
Is read and the data is updated. For example, during the period t = 1 second, lubricating oil line pressure data P1 to P5 each consisting of about several tens of data are read.

Next, an example of a procedure of an overload determination process by the overload determination processing device 10 will be described with reference to a flowchart shown in FIG. First, in step N101, during a period t, the output from each of the pressure sensors S1 to S5 is read, and the lubricating oil line pressure indicating the lubricating oil line pressure for each of the five oil ejection holes A1 to A5 of the spherical thrust bearing 54 is read. Data P1 ~
Get P5. In step N102, lube oil line pressure data P1 ~
P5 determine the maximum value P _M in the entire. Then step N1
Maximum value P _M is determined whether larger than the set value R _M in 03. Here, the maximum value P _M is If the set value R _M less than the process returns to step N101 as cone crusher 50 is operated in a proper load condition.

Set value R_MIf the number exceeds
(YES in step N103), and in step N104, an initial value
One is added to the check counter for the number of times zero is given.
(N = n + 1). Next, proceed to step N105,
It is determined whether or not the content of the
You. In other words, the previous maximum value is the set value R
_MIt is determined whether it was greater. Here, this time
First, the maximum value P_MIs the set value R_MIf it exceeds
(NO in step N105), step N101 to increase the certainty
Return to Then, in this embodiment, the maximum value is twice consecutively.
Set value R_MIs exceeded (YE in step N105).
S), it is determined that the cone crusher 50 is being overloaded.
And the content of the number-of-times check counter is
After zeroing (n = 0), in step N107 the cutout
A command to reduce the ore supply is given to the ida 81. This allows
The supply of rough stones to the cone crusher 50 is reduced by a predetermined amount.
Will be. If YES in step N105, an alarm is issued.
The warning indicator 17 may be lit to emit light (s
Step N108).

FIG. 9 is a flowchart showing another example of the procedure of the overload determination process by the overload determination processing device 10.
First, in step N201, during the period t, the output from each of the pressure sensors S1 to S5 is read, and the output of the spherical thrust bearing 5 is set.
The lubricating oil line pressure data P1 to P5 indicating the lubricating oil line pressure are obtained for each of the oil ejection holes A1 to A5. Step N2
02 the average value P _A in the entire lubricating oil line pressure data P1 to P5. Next, in step N203, the average value P _A
Is larger than the set value _RA . here,
If the average value P _A is smaller than the set value R _A, it is determined that the cone crusher 50 is operating under an appropriate load, and the process returns to step N201.

If the set value _RA is exceeded (YES in step N203), a command to reduce the supply amount of the raw stone is given to the cutout feeder 81 in step N204. Thus, the supply amount of the ore to the cone crusher 50 is reduced by a predetermined amount. If YES in step N203, an alarm may be issued to turn on the alarm indicator lamp 17 (step N205).

As a result, the cone crusher is overloaded based on the analysis of the fluctuation state of the line pressure of the lubricating oil supplied to the respective oil ejection holes of the spherical thrust bearing through the respective pipelines connected thereto. It can detect that the cone crusher is operating in a state, and by issuing a command or an alarm to reduce the amount of ore supply to the cone crusher, the overload state of the cone crusher is eliminated and the spherical thrust bearing due to excessive supply of ore Eliminating the failure of the eccentric bearing, it is possible to prevent a decrease in the operating rate of the cone crusher.

Next, a description will be given of an embodiment of a device for detecting an uneven supply state of a crushed object. Figure 10 is a diagram showing the overall configuration of the application of the objects to be crushed polarized supply state detection apparatus according to the present invention in a cone crusher, Figure 11 is polarized supply determination process definitive 10
It is a block diagram of a structure of an apparatus . Here, the same portions as those shown in FIG. 5 are denoted by the same reference numerals as in FIG. 5, and the description thereof will be omitted.

As shown in FIG. 10, high pressure is applied from the flow divider 67 to the five oil ejection holes A1 to A5 of the spherical thrust bearing 54 of the cone crusher 50 through the respective pipelines L1 to L5 connected to them. Lubricating oil is supplied to each of the five oil ejection holes A1 to A5.
A total of five pressure sensors S1 to S5 are provided, one for each L5. Oil ejection holes A1 from pressure sensors S1 to S5
The output indicating the lubricating oil line pressure for A5 is supplied to a partial supply determination processing device 20, which will be described later.

The cone crusher 50 wherein for detecting based to an output indicating the lubricating oil line pressure of whether it is operated in rough polarization supply state from the pressure sensor S1~S5
As shown in FIG. 11, the bias supply determination processing device 20 includes an analog multiplexer 21, an A / D converter 22, a CPU 23,
A ROM 24 storing a program, a RAM 25 storing determination data, and an output interface 26 are provided.
An output indicating the lubricating oil line pressure from each of the pressure sensors S1 to S5 is input, and the cone crusher 50
It is determined whether or not is in the rough supply state. If the vehicle is operated in the uneven supply state, an alarm is issued and the warning indicator lamp 27 is turned on.

In the partial supply determination processing unit 20, five outputs indicating the lubricating oil line pressure from each of the pressure sensors S1 to S5 are input to the multiplexer 21 and sequentially transmitted to the A / D converter 22 one by one. Is done. The high-speed switching of the channel of the multiplexer 21 for about several milliseconds is performed by a command from the CPU 23. The output of the multiplexer 21 is A
The signals are converted into digital signals by the / D converter 22 and are stored in the RAM 25 under the control of the CPU 23 as lubricating oil line pressure data P1 to P5 indicating the lubricating oil line pressures for the oil ejection holes A1 to A5. Note that the set values R _MM and R _AM are stored in the RAM 25 in advance as determination data.

In the partial supply determination processing device 20, each pressure sensor
The output indicating the lubricating oil line pressure from S1 to S5, that is, the lubricating oil line pressure data P1 to P5 is at least one cycle or more of the eccentric oscillating motion performed by the spindle assembly head 52 at about 240 to 360 times / minute. After the period t is read and the unbalanced supply determination process described later is performed, the next period t
Is read and the data is updated. For example, during the period t = 1 second, lubricating oil line pressure data P1 to P5 each consisting of about several tens of data are read.

Next, an example of the procedure of the uneven supply determination processing by the uneven supply determination processing device 20 will be described with reference to the flowchart shown in FIG. First, in step N301, during the period t, the output from each of the pressure sensors S1 to S5 is read, and the lubricating oil line pressure indicating the lubricating oil line pressure for each of the five oil ejection holes A1 to A5 of the spherical thrust bearing 54 is read. Data P1 ~
Get P5. Next, in step N302, obtains the maximum value P1 _M -P5 _M in each of the lubricating oil line pressure data P1 to P5, their five maximum values P1 _M -P5 those smallest from those largest in _M Is subtracted to obtain a maximum value maximum difference _PMM . Next, at step N303, the maximum value maximum difference P _MM
Is larger than the set value _RMM . here,
If the maximum value maximum difference P _MM is smaller than the set value R _MM ,
The process returns to step N301 assuming that the cone crusher 50 is operated in the rough stone uniform supply state.

[0033] If it exceeds the set value R _MM (YES at step N303), at step N304, 1 is added to the number of times check counter in advance an initial value zero is given (n = n + 1). Next, the process proceeds to step N305, where it is determined whether or not the content of the number-of-times check counter has become 2. That is, it is determined whether the previous maximum value maximum difference was larger than the set value _RMM . here,
When the maximum value maximum difference P _MM exceeds the set value R _MM for the first time this time (NO in step N305), the process returns to step N301 to increase reliability. In a case where the maximum value maximum difference consecutively twice in this embodiment has exceeded the set value R _MM (YES at step N305), the cone crusher 50 is determined to be operated in rough polarization supply state And step N306
After the content of the number-of-times check counter is set to zero (n = 0), an alarm is issued in step N307, and the alarm indicator 27 is turned on. As a result, the operator who knows that the operation is performed in the rough stone supply state is adjusted by the left and right position of the supply chute 83 above the cone crusher 50, so that the rough stone supply state is eliminated.

FIG. 13 is a flowchart showing another example of the procedure of the uneven supply determination processing by the uneven supply determination processing device 20.
First, in step N401, the output from each of the pressure sensors S1 to S5 is read during the period t, and the output of the spherical thrust bearing 5 is determined.
The lubricating oil line pressure data P1 to P5 indicating the lubricating oil line pressure are obtained for each of the oil ejection holes A1 to A5. Next, in step N402, the average value is obtained P1 _A -P5 _A in each of the lubricating oil line pressure data P1 to P5, their five average
An average maximum difference P _AM is obtained by subtracting the smallest one from the largest one in P1 _{A to} P5 _A. Then step
In N403, it is determined whether the average maximum difference P _AM is larger than the set value R _AM . Here, if the average maximum difference P _AM is smaller than the set value R _AM, it is determined that the cone crusher 50 is operating in the rough stone uniform supply state, and the process returns to step N401.

[0035] if it exceeds the set value R _AM (YES in step N403), the cone crusher 50 is determined to have been operated in rough polarization supply state, an alarm in step N404, the warning indicator 27 Lights up.

As a result, based on the analysis of the fluctuation state of the line pressure of the lubricating oil supplied to the respective oil ejection holes of the spherical thrust bearing through the respective pipelines connected to them, the cone crusher is shifted to the rough ore. It can detect that the cone crusher is operating in the supply state, and by issuing an alarm, the state of uneven supply of the cone crusher rough stone is eliminated, eliminating the failure of the spherical thrust bearing and eccentric bearing due to the uneven supply of rough stone, and the cone crusher It is possible to prevent a decrease in the operation rate.

[0037]

As can be understood from the above description , according to the overload condition detecting apparatus in the cone crusher according to the present invention , a plurality of oils are provided between the underside of the cone head of the spindle assembly head performing eccentric oscillating motion. In a cone crusher having a spherical thrust bearing configured to supply lubricating oil at a high pressure from an ejection hole to support the main spindle assembly head by a lubricating oil pressure action, the cone thruster includes a spherical thrust bearing.
Lubricating oil line pressure for each oil outlet is detected by a pressure sensor
And the entire output from each pressure sensor in a predetermined period
Find the maximum or average value, and calculate the maximum or average value and
By comparing the set value with
Detects that the lasher is in overload operation, and
Directive to reduce the amount of crushed material supplied to the crusher, or
Or an alarm is issued, eliminating the overload condition of the cone crusher and eliminating the failure of spherical thrust bearings and eccentric bearings due to excessive supply of crushed material, preventing a decrease in the operating rate of the cone crusher can do. Further, according to the device for detecting the state of uneven supply of crushed objects in the cone crusher according to the present invention , the lubricating oil line pressure for each of the oil ejection holes of the spherical thrust bearing is set to a pressure sensor.
Detected by the capacitors, the maximum value or average value of a predetermined time period for each output from the pressure sensors determined, thereof in the maximum value maximum difference or the respective average value, indicating the maximum difference between them in each of the maximum value The average value maximum difference that indicates the maximum difference is obtained, and the maximum value maximum difference or the average value maximum difference is compared with a predetermined set value, thereby obtaining a cone cone maximum difference.
The washer detects that the crushed
And issue an alarm to that effect
To be crushed in the crushing chamber of the cone crusher
This eliminates the failure of the spherical thrust bearing and the eccentric bearing due to the uneven supply of the crushed object, and can prevent the operating rate of the cone crusher from decreasing.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a cone crusher having a spherical thrust bearing to which the present invention is applied.

FIG. 2 is a partially omitted top view of the spherical thrust bearing shown in FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a view for explaining a state of a line pressure change of lubricating oil supplied to a plurality of oil ejection holes of a spherical thrust bearing through respective pipelines connected to the oil ejection holes.

FIG. 5 is a diagram showing an overall configuration when an overload state detecting device according to the present invention is applied to a cone crusher.

FIG. 6 is a view for explaining pipes connected to respective oil ejection holes of the spherical thrust bearing of the cone crusher shown in FIG. 5 (FIG. 1).

7 is a block diagram of the overload determination processing device definitive in FIG.

8 is a flowchart illustrating an exemplary procedure of the overload determination processing by definitive overload determination processing unit in FIG.

9 is a flowchart illustrating another example of the procedure of the overload determination processing by definitive overload determination processing unit in FIG.

FIG. 10 is a diagram showing an overall configuration in a case where the crushed material uneven supply state detecting device according to the present invention is applied to a cone crusher.

11 is a block diagram of a polarized supply determination processing device definitive in FIG.

Is a flow chart showing an example of a procedure of partial supply determination process according to FIG. 12] polarized supply determination processing device definitive in FIG.

13 is a flowchart illustrating another example of the procedure of polarized supply determination process by polarized supply determination processing device definitive in FIG.

[Explanation of Signs] 10 ... Overload judgment processing device 11, 21 ... Multiplexer 1
2, 22 A / D converter 13, 23 CPU 14, 24 ...
ROM 15, 25 ... RAM 16, 26 ... Output interface 17, 27 ... Alarm indicator 20 ... Partial supply determination processing device 50
… Cone crusher 51… Lower fuselage frame 52… Spindle assembly head 52a… Spindle 52b… Cone head 52c…
Mantle 53 ... Thrust support 54 ... Spherical thrust bearing 54a, 54b ... Oil groove 54c ... Oil recovery hole 55 ... Eccentric shaft
55a: Large bevel gear 57: Eccentric bearing 59: Lower fuselage bearing
60 ... horizontal axis 60a ... bevel gear 60b ... V-belt wheel 61 ... upper body frame 62 ... cone cave 63 ... supply hopper 64
… Lubricating oil tank 65… pump 67… flow divider
80… Rough hopper 81… Cutting feeder 82… Belt conveyor 83… Supply chute A1 ～ A5… Oil ejection hole of spherical thrust bearing L1 ～ L5… Pipe line S1 ～ S5… Pressure sensor

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Takano 2-3-1 Shinhama, Arai-machi, Takasago-shi, Hyogo Prefecture Inside Kobe Steel, Ltd. Takasago Works (56) References Japanese Utility Model Showa 60-168549 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B02C 2/00-2/10 B02C 25/00

Claims (2)

(57) [Claims] A lubricating oil is supplied at high pressure from a plurality of oil ejection holes between a spindle assembly head having a cone head and a mantle fixed to a spindle and a lower surface of a cone head of the spindle assembly head. A spherical thrust bearing for supporting the spindle assembly head by the action of lubricating oil pressure, and a crusher in a cone crusher for crushing the material to be crushed between the cone cave and the mantle by eccentrically rotating the spindle assembly head. a load state detection device, the pressure for detecting the line pressure of the lubricating oil supplied through the conduit is <br/> connected to each of the plurality of the oil ejection holes of the spherical thrust bearing, respectively A sensor, and an output from each of the pressure sensors and a predetermined set value.
Based on the comparison result, overload for issuing an alarm indicating that the command reducing the crush material supply to the cone crusher, or corn crusher is operated under overload conditions
An overload state detection device in a cone crusher, comprising: a load determination processing device. 2. Lubricating oil is supplied at high pressure from a plurality of oil ejection holes between a spindle assembly head having a cone head and a mantle fixed to the spindle and a lower surface of the cone head of the spindle assembly head. A spherical thrust bearing for supporting the spindle assembly head by a lubricating oil pressure action; and a crusher for crushing an object to be crushed between a cone cable and the mantle by eccentrically rotating the spindle assembly head. A crushed material partial supply state detection device, wherein each of the plurality of oil ejection holes of the spherical thrust bearing detects a line pressure of lubricating oil supplied through each of the pipelines. A maximum value or an average value for each output from each of the pressure sensors during a predetermined period , and a maximum value indicating the maximum difference between the maximum values. Finding the maximum maximum difference, or the average maximum difference indicating the maximum of those differences in each of the average values,
A cone crusher based on a comparison result between the maximum value maximum difference or the average value maximum difference and a predetermined set value.
And a partial supply determination processing device that issues an alarm indicating that the device is operated in a state in which the crushed material is unevenly supplied.