SU1255210A2 - Apparatus for controlling the charging of cone-type crusher - Google Patents

Description

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H3o6peteHHe is related to the automatic control of cone crushers and can be used in ferrous and nonferrous metallurgy, in the building materials industry and in the chemical industry and is an improvement to the known device by author. № 778800 The purpose of the invention is to increase the reliability of the device. Fig. 1 is a block diagram of a device for controlling the feed of a cone crusher; FIG. 2 is a diagram of a brake device of a crusher engine.

The device (Fig. 1) contains a motor (crusher body 1, power sensor 2, controller 3, power setting device 4, feeder motor 5 with control gear 6, vibration sensor 7, detector 8, smoothing filter 9, setting device Vibration level 10, inverter 11, second block: slitter filter 12, first 13 to second 14 multiplication blocks, first 15 and second 16 differentiating blocks adder 17, braking force adjuster 18, unipolar relay element 19 and braking device 20 crusher motor, consisting of dynamic braking circuit 21 (FIG. 2), friction The first electromechanical brake 22, high-voltage switch 23, interlocked with the high-voltage switch 24 contacts, contacts 25 and 26.

The device works as follows.

With a nominal mode of operation, characterized by an average or lower average strength of the material received for processing, a nominal filling of the crushing chamber and the absence of non-crumbling bodies in the material, the signal from the power sensor 2 for the crusher zigatel 1 goes to the regulator 3, where it is compared with the signal Zadat Chika 4 power. The adjusted signal for setting the performance of the feeder from the controller 3 is fed through the control gear 6 to the motor 5 of the feeder. Thus, the control loop stabilizes the power consumption and, consequently, the filling of the crusher at a given level by changing the material feed. With such redema, the signal of the smoothing filter 9 is less

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The comparison threshold of the Vibradia level control unit 10 and the signal at the output of the adder 17 is less than the sensitivity threshold of the unipolar relay element 19. When a difficult-to-crush material enters the crusher or the material is pressed in the crushing chamber on a cone, the bowl often raises and vibrates. The signal of the vibration sensor 7 after the detector 8 and the smoothing filter 9, entering the generator of the vibration level 10, exceeds the comparison threshold. At the output of the vibration level adjuster 10, a signal that arrives at the input of the regulator 3 and through the inverter 11 to the input of the control gear 6, appears, reduces the supply of the source material. In this way, the vibration level of the thicket is limited by reducing the material feed to the crusher.

In this mode, the signal at the output of the adder 17 is less than the threshold of the relay element 19. When a dangerous metal object enters the crusher, the bowl vibrates and raises the bowl until the cushion-spring blocks are fully compressed, which limits the movement of the cone. A sharp increase in the moment of resistance changes the value of the power consumed by the motor.

The signal of the power sensor 2 after the smoothing filter 12 is fed to the first input of the second multiplication unit 14, the second input of which receives the signal of the second smoothing filter 9, corresponding to the level of vibration. The signal corresponding to the product of these signals from the multiplier 14 enters the second summing input of the adder 1 7. Admission of a hard-to-crushing material to the crusher can also increase the vibration level of the thicket and the value of the power consumed by the motor. But due to the mandatory presence of the processes of mixing and averaging the source material and the continuity of its supply to the crusher, the response of the power sensor 2 and the vibration sensor 7 has a much longer transient time than the response to the arrival of a metal object. This phenomenon is used to increase the selectivity of the reaction of the device to the arrival of a hard material or metal.

kih objects. For this purpose, the output signal of the filter 12 is fed to the first input of the first block 1.3 multiplying through the first differentiating unit 15, and the output signal of the filter 9 arrives at the second input of the first multiplication unit 13 through the second differentiating unit 16. The output signal of the multiplication unit 13 corresponding to the product of the derivative power and the derivative of vibration, is fed to the first summing input of the adder 17. The subtracting input of the adder 17 receives the setpoint signal 18. The output; the signal of the adder 17 goes through the unipolar relay element 1 9 to the corresponding inputs of the engine starting equipment of the engine 5, the feeder and the engine brake device 20. 1 crusher. Thus, at the input of the unipolar relay element 19, a signal is generated according to the algorithm

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where P is the power consumed by the crusher motor; A is the amplitude of vibration; To - signal setting 18. The brake device 20 includes, as the main, the circuit 21 of the dynamic

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braking (figure 2), ensuring the dissipation of the kinetic energy of the rotor of the engine. To dissipate the kinetic energy of the shaft of the rubber-finger clutch motor, a smaller bevel gear with the shaft, the braking device is equipped with a friction electromagnetic brake 22. The braking device 20 is connected to the relay element 19 by contacts 25 and 26 of the relay element 19. Dynamic braking circuit i: friction the brake is connected to the high voltage switch 23 of the engine 1 of the crusher by contact 24 interlocked with the high voltage switch 23.

The introduction of a temporal selection of monitored vibration sensor signals and a power sensor by differentiating them and further processing allows increasing the selectivity of the device's response to the entry of a hard-to-dig mineral into the crusher and a crusher of indestructible bodies dangerous for the crusher. Simultaneous use of a dynamic braking circuit and a friction electromagnetic brake in a braking device when the cone is jammed with a dangerous non-crushable body makes it possible to even out the time and the diagram of emergency braking of all drive elements, while respecting the permissible mechanical loads, which increases the reliability of the crusher.

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Editor G. Volkova

Compiled by V.Alekperov

Tehred And, Veres Proofreader L. Patay

Order 4744/8 Circulation 582Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

FIG. 2

Claims (1)

DEVICE FOR REGULATING THE LOAD OF A CONE CRUSHER by ed. No. 778800, characterized in that, in order to increase the reliability of the device, it is equipped with a second smoothing filter, the first and second multiplication blocks, the first and second differentiating blocks, an adder, a brake force adjuster, a unipolar relay element and a brake device of the crusher engine, and the input the first differentiating unit is connected through the second smoothing filter to the output of the power sensor, the input of the second differentiating unit is connected to the output of the first smoothing filter, the outputs of the first and second cerned differentiating units are connected to respective inputs of the first multiplier, whose output is connected to a first summing input of the adder, the first and second inputs of the second multiplying unit respectively connected to outputs of the first and second smoothing filters, yield second- _and second multiplication block connected to the secondary ® rum the summing input of the adder, to the subtracting input of which the brake force adjuster is connected, and the output of the adder is connected to the corresponding input via a unipolar relay element her equipment-motor feeder and to the input of the brake device of the crusher engine. * .1 2552 10