Device for measuring the wear of a roller of a high-pressure roller press

Abstract

The invention relates to a device for measuring the wear (Δ) of a roller (102, 103) of a high-pressure roller press (100) and to a corresponding method for measuring this wear (Δ). According to the invention, the following is provided: at least one sensor (200, 200'), which can be moved over the length of the roller (102, 103) by a movement device (216, 216'), for measuring the surface speed of the roller (102, 103), at least one angular speed measuring device (215, 215') which cooperates with a shaft of the roller (102, 103), and at least one computer device (220) which is connected to the at least one sensor (200, 200') and the at least one angular speed measuring device (215, 215') and which relates the angular speed of the roller (102, 103) to the surface speed and calculates the wear (Δ) of the roller (102, 103) therefrom.

Description

[0001] Device for measuring the wear of a roller of a high-pressure roller press

[0002] The invention relates to a device for measuring the wear of a roller of a high-pressure roller press and a corresponding method for measuring this wear.

[0003] High-pressure roller presses for comminuting brittle material are subject to bathtub-like wear, if you consider the profile of a grinding roller. The grinding roller is subject to greater wear in the center of the profile than at the edges. The consequence of this uneven wear is that the gap between the two rollers, which pull the material through and crush it under pressure, can no longer be adjusted to any desired size. This reduces the grinding efficiency of the high-pressure roller press. As the rollers become worn, the material must pass through a high-pressure roller press more frequently before it is crushed finely enough.Monitoring the wear condition of a high-pressure roller press is therefore necessary in order to be able to operate industrial plants that use this high-pressure roller press economically and to be able to plan necessary maintenance measures, such as grinding or roller replacement, at an early stage.

[0004] The object of the invention is therefore to provide a device and a method for measuring the wear of a roller of a high-pressure roller press.

[0005] The object of the invention is achieved by a device for measuring the wear of a roller of a high-pressure roller press having the features of claim 1. Further advantageous embodiments of the device are specified in the subclaims to claim 1.

[0006] The method object according to the invention is achieved by a method for measuring the wear of a roller of a high-pressure roller press with the features of claim 6. Further advantageous embodiments of the method are specified in the subclaims to claim 6.

[0007] The invention is explained in more detail with reference to the following figures. They show:

[0008] Fig. 1 shows a device according to the invention for measuring the wear of a roller of a high-pressure roller press, which is installed in a high-pressure roller press in a view from above onto the high-pressure roller press.

[0009] Fig. 2 shows the device from Figure 2 in a side view of the high pressure roller press.

[0010] Figure 1 shows an embodiment of a device according to the invention for measuring the wear A of a roller 102, 103 of a high-pressure roller press 100, which is installed in a high-pressure roller press 100, in a view from above of the high-pressure roller press 100. The device for measuring the wear A of a roller 102, 103 of a high-pressure roller press 100, shown exaggerated here, measures the wear A from the quotient of the surface speed and the angular speed of the roller 102, 103 and thus calculates its circumference and thus also its diameter. The device shown here has at least one sensor 200, 200', which can be moved by a movement device 216, 216' running parallel to the roller axis and over the length of the roller 102, 103, for measuring the surface speed of the roller 102, 103, and at least one angular velocity meter 215, 215' cooperating with a shaft of the roller 102, 103.In this embodiment, it is provided that these two detectors are connected to at least one computing device 220. This computing device 220 relates the measured angular velocity of the roller 102, 103 to the measured surface speed and calculates the wear A of the roller 102, 103 from this. In the embodiment of the device shown here, the at least one sensor 200, 200' is a laser sensor that operates according to the differential Doppler method. Here, two laser beams, each incident at an angle αp to the optical axis, are superimposed on the surface of the measurement object. For a point P moving at a speed v through the intersection point of the two laser beams, the frequencies of the two laser beams are Doppler-shifted. The two laser beams overlap in the measurement volume, generating an interference pattern of light and dark stripes.The fringe spacing As is a constant that depends on the laser wavelength X and the angle between the measuring beams 2cp:.

[0011] As = X (2 sin cp)

[0012] When a particle moves through the striped pattern, the intensity of the light scattered back is modulated. A photodetector in the measuring head generates a signal whose frequency fo is directly proportional to the velocity component of the surface in the measuring direction v. P and it holds: fo = v P / As = (2v / X) sin cp fo = Doppler frequency v P = Velocity vector in measuring direction

[0013] As = strip spacing in the measuring volume

[0014] The value X / sin cp forms the measuring standard for speed and length measurement.

[0015] In one embodiment of the invention, the angular velocity sensor can be a Hall-effect sensor excited by a magnet moving relative to the Hall sensor, or vice versa. If a Hall element is placed along a diametrically magnetized magnet, the rotating magnet generates a sinusoidal output voltage. By measuring the frequency, the angular velocity can be determined very precisely.

[0016] Figure 2 shows the device from Figure 2 in a side view of the high-pressure roller press 100. The sensor for measuring the surface speed of the roller 102, 103 is located above the roller 102, 103, next to a feed device 104 for the grinding material located above a roller gap 105. In the illustration shown here, the surface of the roller 102, 103 is measured contactlessly using a laser, with the laser beam highlighted by a corresponding laser symbol.

[0017] LIST OF REFERENCE SYMBOLS

[0018] High pressure roller press 202' guide bar

[0019] Machine frame 210 spindle drive

[0020] Roller 210' spindle drive

[0021] Roller 215 angular velocity meter

[0022] Feeding device

[0023] 215' angular velocity

[0024] Roller gap knife

[0025] 216 Movement device

[0026] sensor

[0027] 216' Movement device ' Sensor

[0028] spindle

[0029] 220 Calculator device ' spindle

[0030] A Wear and tear

[0031] guide rod

Claims

PATENT CLAIMS 1. Device for measuring the wear (A) of a roller (102, 103) of a high-pressure roller press (100), characterized in that at least one sensor (200, 200') which can be moved by a movement device (216, 216') over the length of the roller (102, 103) and for measuring the surface speed of the roller (102, 103), and at least one angular velocity meter (215, 215') which interacts with a shaft of the roller (102, 103) is connected to at least one computer device (220), wherein the computer device (220) relates the angular speed of the roller (102, 103) to the surface speed and calculates the wear (A) of the roller (102, 103) therefrom.

2. Device according to claim 1, characterized in that at least one sensor (200, 200') operates according to the differential Doppler method.

3. Device according to claim 1 or 2, characterized in that the movement device (216, 206') is a spindle drive.

4. Device according to claim 1 to 3, characterized in that the angular velocity sensor is a Hall sensor which is excited by a magnet which moves relative to the Hall sensor or vice versa.

5. Device according to one of claims 1 to 4, characterized in that Computer device (220) further comprising the movement device (216, 216') is connected so that the computer device (220) can detect the position of the at least one sensor (200, 200') and calculates a wear profile from the rotational speed, the surface speed and the position of the at least one sensor (200, 200').

6. Method for measuring the wear (A) of a roller (102, 103) of a high-pressure roller press (100), characterized by Measuring the surface speed of the roller (102, 103) with at least one sensor (200, 200') movable over the length of the roller (102, 103) by a movement device (216, 216'), Measuring the angular velocity of the roller (102, 103) with at least one angular velocity meter (215, 215') cooperating with a shaft of the roller (102, 103), and Calculating the wear (A) of the roller (102, 103) with at least one computing device (220) which is connected to the at least one sensor (200, 200') and the at least one angular velocity meter (215, 215'), and which relates the angular velocity of the roller (102, 103) to the surface speed and calculates the wear (A) of the roller (102, 103) therefrom.

7. Method according to claim 6 characterized by Measuring surface velocity using the differential Doppler method.

8. Method according to claim 6 or 7, characterized by Moving the at least one sensor (200, 200') by means of a spindle drive (210, 210') 9. Method according to one of claims 6 to 8, characterized by Measuring surface speed using a Hall sensor excited by a magnet moving relative to the Hall sensor or vice versa.

10. Method according to claim 6 to 9, characterized by Calculating a wear profile calculated with the aid of a computer device (220) which is further connected to the movement device (216, 216') so that the computer device (220) can detect the position of the at least one sensor (200, 200') and calculates a wear profile from the rotational speed, the surface speed and the position of the at least one sensor (200, 200').

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