SU1052263A1 - Apparatus for determining the crushing power of material in cone internal crusher - Google Patents

Abstract

A DEVICE FOR DETERMINING THE POWER OF CRUSHING A MATERIAL IN A CONE INERTIAL CRUSHER, including the display of information. characterized in that, in order to increase accuracy, it is equipped with an internal cone oscillation amplitude sensor, an unbalance position and an internal cone sensor, three signal normalizers, a unit for calculating the angle between the centrifugal forces of the internal cone and unbalance, a sinus transducer and a unit multiplied by multiplying, moreover, the amplitude sensor of the inner cone oscillations is connected to the first input of the multiplication unit through the first signal normalizer, the unbalance position and the inner cone sensors are connected But through the second and third signal normalizers to the first and second inputs of the block, calculating the angle between the centrifugal forces / L of the internal cone and unbalance, the output of which is connected to the second input of the multiplication unit through a sinus converter, and g bride is connected to the information display unit. sl to th 05 oe

Description

The invention relates to the crushing of various materials and can mainly be used in the building materials industry in ferrous and non-ferrous metallurgy. Determining the power spent on crushing the material is necessary, in particular, to estimate the energy intensity (kWh per ton of processed ore) of the crushing process parameter, which is the most important characteristic of the process and the machine. In a cone eccentric crusher, the parameter E is determined by using instruments for measuring the power produced commercially, the crushing power of the material .NP is calculated as the difference between the power Mrslb consumed by the driving motor in the operating mode and the power th idle xx crusher stroke. A device for determining the power of crushing a material in a cone crusher is known, which contains a display unit, a signal converter, as well as current and voltage transformers included in the power circuit of a driving motor. The device makes it possible to determine the power NQ associated with the process of crushing the material as the difference between the power consumed from the network by a driven electric drive. and the power of N idling crusher Cl ..; The NO power determined in this way does not fully reflect the actual value of the material fractional power, since the parameter Nyy is not equivalent to the corresponding power loss in the crusher operating mode. This leads to a significant error in the calculation of Ng, the value of which is practically impossible to estimate. In addition, the device cannot be used to determine the crushing power of a material in a cone inertial crusher due to the kinematics of its working body. A device for determining the crushing power of a material in a cone inertial crusher / switch on information display unit is known. The device contains a signal converter, current transformers voltage, provides the display of the power signals in the operating mode Npo (6 and in the idling mode N, which allows in the first approximation to determine NO effect associated with the process of crushing the material in a cone eccentric crusher t2 A disadvantage of the known device is the low accuracy of determining NO. The purpose of the invention is to increase the accuracy. The goal is achieved by the device for determining the power of crushing material in the inertial cone crusher information display, is equipped with a sensor j of the amplitude of oscillations of the inner cone, sensors of the position of the unbalance and the internal cone, three normalizers of signals, a unit for calculating the angle between centrifugal forces of the internal cone and unbalance, a sine converter and a multiplication unit, the amplitude sensor i, the internal cone is connected to the nepBtJM input of the multiplication unit through the first signal normalizer: the unbalance position and the internal cone are connected to the first and third signal normalizers the second inputs of the unit for calculating the angle between the centrifugal forces of the inner cone and the unbalance, the output of which is connected to the second input through a sine converter and multiply, and the output of the multiplication block is connected to the information display unit. The device is realized on the basis of measurements of the amplitude A of the displacement of the inner cone from the axis of the crusher body at the level of the lower edge of the cone, as well as the angle H formed by the directions of the unbalance centrifugal forces and the inner cone, and calculating the N (j XA3in4, where a scale factor depending on the size of the crusher, Np is the power of the crushing process in the crusher. FIG. 1 shows a block diagram of the device; fit; 2 shows the connection of the elements of the device with the crusher; FIG. 3 shows the kinematic diagram of the angular deviations of the internal conois and Fig. 4 shows section A-A in Fig. 3. The device (Fig. 1) contains an oscillation amplitude sensor 1 of the inner cone, position sensors 2 and 3 of the unbalance and inner cone, signal normalizers 4-6, calculating unit 7 and an information display unit 8. The calculation unit 7. includes the angle calculator block 9, the sin calculator calculation unit 10 and the multiplication unit 11. Sensors 1 - 3 are located on the crusher (FIGS. 2 and 3), including in particular, the cones inner L 2 and outer 13, the latter is rigidly connected to the body 14, which by means of vibroisol The ditch 15 is supported on a fixed base 16. An unbalance 18 is located on the shaft 17 of the inner contour 12, which by means of, for example, a ball spindle 19 is mechanically connected with the element, and is driven 20.

The sensor 1 is connected via a signal equalizer 4 to the first input of the multiplication unit 11, sensors. 2 and 3 by means of signal normalizers 5 and 6 are connected to the input block

9 angle converter угла to code, the output of which is connected to the input of the unit

10 calculating sin, the output of which is connected to the second input of multiplication unit 11, the output of which is associated with the information display unit 8.

The oscillation amplitude sensor 1 can be performed, for example, in the form of a deflection angle transducer of the ball spindle 19 from the vertical. The position sensor 2 can be made, for example, in the form of an inductor with a core interacting with a controlled element determining the position of the inner cone 12, for example, it can be a flange 21 of the upper head of a ball spindle 19 made of a ferromagnetic material. The position sensor 3 can be made, for example, in the form of an induction converter, the permanent magnet 22 of which is mounted on the balance 18.

. The device works as follows.

When the ball spindle 19 rotates, the imbalance 18 creates a centrifugal force that deflects the axis of the inner cone 12 from the vertical through the angle y. The magnitude of the angular deviation y and d (Fig. 3) depends on the horizontal displacement amplitude A of the lower edge of the inner cone 12, measured by the transducer from the output of which the signal arrives at the input of the normalizer 4, which converts the input signal to a form acceptable for operation of the unit

11 multiply. When crushing the material entering the crusher. 18 unbalance ahead of the inner cone

12 at the angle h (Fig. 4), which is caused by the presence of resistance forces to the rolling of the cone 12 according to

The parameter H is determined by the physicomechanical properties of the material, the unbalance value, as well as the power of the driving motor and is one of the most important characteristics of the crushing mode and the crusher as a whole. In modern inertial crushers of type KID, the parameter oscillates between 20 and 50. The measurement is made by determining the position of unbalance 18 and the inner cone 12. The position of unbalance is detected by sensor 3, which is excited when the magnet 22 passes near it and generates an impulse signal j the input of the normalizer is 6. Last, provide a BaiiT signal reduction to a form acceptable for further registration. The position of the inner cone 12 Q is recorded by the sensor 2 when the flange 21 with the shaft 17 (figure 4) approaches it, moving in a circle 23.

The signal from the output of sensor 2 post5 goes to the input of the normalizer 5 and then to the input of calculating unit 9 i /, the output of which sends a signal to the input of calculating unit 10 sin H, from the output of which the signal goes to input of multiplication unit 11. With the output of multiplication unit 11, a signal proportional to the product K A sin i / is input to the information display unit 8. Information on parameters A, F and K is also displayed on the latter. 5 The device allows to extract information about the energy intensity of the crushing process, based on which the machine’s efficiency can be determined and the mode of its operation can be optimized, and at 0 the development of the new size of the machine is possible select its design parameters.

The capacity of the crusher increases by 3-5% (approximately 2 thousand rubles per one crusher per year), which is reached. It is obtained as a result of a more correct choice of the design parameters of the crusher, determined by the parameters K, A and V in the power formula. .

FIG.

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Claims (1)

DEVICE FOR DETERMINING THE CAPACITY OF CRUSHING MATERIAL IN A CONE INERNAL CRUSHER, which includes a btsk display of information, characterized in that, in order to improve accuracy, it is equipped with an oscillation amplitude sensor of the inner cone, unbalance and inner cone position sensors, three signal normalizers, an angle calculation unit between centrifugal forces of the inner cone and unbalance, a sine transducer and a multiplication unit, and the sensor of the amplitude of oscillations of the inner cone through the first normalizer with the ignals are connected to the first input of the multiplication unit, the unbalance and inner cone position sensors are connected respectively through the second and third signal normalizers to the first and second inputs of the angle calculation unit between the centrifugal forces of the inner cone and unbalance, the output of which is connected through the sine converter to the second input of the multiplication unit, and the output of the multiplication unit is connected to the information display unit. > I