CONDITION DETECTING METHOD AND DEVICE FOR TROUBLE DIAGNOSIS OF BALL MILL

Hereinafter, the present invention as defined by the condition detection method and device for diagnosing a coal pulverizer having products on the attached drawing more detailed as follows.

Figure 1 shows a schematic diagram of the degree and also ball mill crusher in 2000. As ball mill mill is shown, rotates about the horizontal axis is within the drum a plurality of ball and sample are positioned, by ball and sample having a rotary drum in vertical ball dispenser applying impacts and balls between sample sample sample by the action which ground pigments and to combustion chamber. Generally sample of coffee degree determined by the diameter of the balls or, the material of the coking chamber of coke oven sample /, / weight/material of the ball diameter, such as crusher operation conditions or drum rotation speed or the like, depending on the type of crusher such as continuous/non-continuous over the various θ1. level of noise and vibration.

So that the pressure is ball mill grinding blade of state and selectively discharge, a plurality of subjective judgment of vibration based on a reference value as well as in number or number irradiated. However the aforementioned apparatus for improving capacity as crusher, crusher case since the level of noise and vibration generated according variously changed, either only one more criteria determine the state isn't very sharp. The in the present invention, operation conditions or without being restricted by the type of device, device and method for sensing state of diagnosis than quantitatively or more can be realized crusher number a broadcast receiver.

Figure 2 shows a schematic diagram of the device of the present invention are independent each other and also for detecting state, condition detection device of the present invention is as shown, crusher (500) installed lines of one measuring sensor (110), generate an alarm alert unit (120), said measuring sensor (110) receives measurements from delivery to perform a statistical analysis, warning the measurements reaches or exceeds said warning unit (120) operating a number control unit (130) including combustion chamber. At this time said measuring sensor (110) may be the vibrating sensor or noise sensor, the measuring sensor (110) which is measured on the measure is vibration or noise value with each other.

Figure 3 shows a method of the present invention etc. and also when flow of sensing state. The method of the present invention crusher abnormality diagnosis for detecting state, essentially obtains measurements, measurements correction step, measurements statistical analysis step, a warning value setup can be done via the disclosed. Here, crusher to the determination result determined whether the crusher indicated, additional correction step further comprises measurements can be made. In addition these steps by is the warning value is, then quantitatively calculating warning a key generate an alarm alert can be generated is further performed. Base in the embodiment hereinafter, further in the embodiment, each formed between the optimum in the embodiment described as follows.

In the embodiment basic

In the embodiment obtains measurements is basic, measurements correction step, measurements statistical analysis step, a warning value setup can be done via the disclosed.

Said measurement acquisition step, crusher (500) while operating said crusher (500) installed measuring sensor (110) state change over time from order vibration or noise measurements are obtained substrate.

Said compensation step performs measurements, it is judged whether a corrected measurement derived. Wherein said operating condition is obtained, sample material, coking chamber of coke oven sample, ball material, ball diameter, ball weight, such as drum rotation speed or the like variables of said substrate. In specific embodiments for example, the ball and the same blot using grinding drum, rigid material on sample A relatively monitoring device is connected to the milling device generates a vibration sample B material is 6.0. Or, even though the same A sample of almonds, relatively small amount as milling even amount of vibration as milling is 6.0. This would be, crusher to enhance user convenience function or table (table) through said it is judged whether the previously calculated using calibrated by measurements, statistical analysis can be generated by RF power. According to the operation condition through a plurality of experiments previously been through mass production properties crusher mill can be, through same function or a curve fit by using measurement correction table (table) can be. For example ball mill (drum) as a function of vibration according to the rotational speed difference 2 pivotably the curve fit.

Here the vibrating v sized, Ω is rotational speed are disclosed. Coefficient a, b, c includes a plurality of experiments according to a character value.

Measurements said statistical analysis step, the predetermined time period measurements values derived probability density function and statistics S9 statistical analysis. Said period can be properly according to the operation condition. Figure 4 shows a method of the present invention also relates to a method for statistical analysis and warning in the example which via a derived condition detection, as shown in also 4 (A) time according to vibration measurements (also 4 (A) shown by of example modulation) values to 4 (B) shows that the distribution can be such as for statistical analysis. (B) 4 also derive from distribution of probability density function can be, in addition statistical characteristic value as an average value, median, standard deviation or the like can be derived.

Said warning value setup step, statistical characteristics of a key warning value setting measurement values to be coated. In a specific example, the standard deviation of 2 also 4 (B). 33 Times value (2. 33 Σ) set as the sensed pressure value etc.. As well as to only one example, standard deviation of 2 times value S71, S71 correlation value such as 3 times, operating conditions are obtained when properly set according to a warning value.

As aforementioned, according to the status or type of crusher and various driving conditions should be changed or reduced by the diagnosis based, operator subjective criteria in determining or number lyric making only one number is the fault diagnosis has been number because many door. However in the present invention, as described above according to various driving conditions and setting up warning reference, the abnormality diagnosis method by using a crusher abnormality diagnosis reliability, accuracy, and re-can be much improved.

In the embodiment further

In further in the embodiment, additional steps are added depending on the type of crusher can be corrected to a measured value. I.e., basic in the embodiment or in setting up a warning vibration will, in addition to setting up the operating conditions in the embodiment further to output warning the down-type crusher, abnormality diagnosis of P can be further improved.

Figure 5 shows a non-continuous grinding blade of measurements which also relates to a method for example, Figure 6 and one example when a continuous grinding blade of measuring 2000. Also visible 5 as, in the case of non-continuous crusher deviation is grained, charged to a new sample work are repeated. At this time, the processor then crushed sample of vibration according to pass division of the visible region. The largely varying device for diagnosing abnormal state of vibration is difficult in the case of warning value setup removes the corrections-step disclosed.

Figure 6 continuous grinding blade of measuring example sample is non-continuous ball mill unlike an aerating, grinding and, since the number of special paper, serve as internal of a sample state time constant disclosed. The measuring box may change over time is less, additional warning value setup without subsequent corrections by applying statistical analysis described in Figure 4 can be.

Figure 7 shows a non-continuous crusher of the present invention and also for example be in a measurements correction. prior visible in Figure 5, depending on the progress of grinding since measurements varied, additional correction to reduce variation a plurality of hierarchies. 2 Additional correction is based on the method of measurements made at a ratio change over time can be used. I.e., varying over time measurements (also 7 (A)) 1 of a similarly change over time if distributed among the other measuring value, such as extent (B) 7 also change over time can be reduced. The, non-continuous grinding blade of measurements similarly worked to continuous grinding blade of measurements, statistical analysis can be applying warning value setup.

In the embodiment optimal

As above-mentioned operating conditions, after setting up warning is optimized according to the type crusher, the crusher to the predetermined value while operating between elements of the embodiment performs key chamber number can be.

In the embodiment described above in the embodiment or additional base such as after setting up warning through, as in Figure 2 in accordance with the dashed lines, said crusher (500) while operating said crusher (500) installed in said measuring sensor (110) sense a vibration or noise from state change over time measurements are obtained the re-obtains measurements carried out.

Then switches the obtained measurements, the measurements reaches or exceeds the warning, generate an alarm alert generating step particles is formed a plane at least equal to or higher than the event occurred thereby recognizing the grinder for hereinafter.

In the embodiment of the present invention refers to said correspondingly limited, range of applications with a variety of system creates, in the claims claim the subject matter of invention made without deviating from the present invention if the person with skill in the art in various modifications and flawless as well as anyone capable of embodiment are disclosed.