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

Abstract

The invention relates to a device for measuring the wear (Delta) of rollers (102, 103) of a high-pressure roller press (100) and to a corresponding method for measuring the wear (Delta). According to the invention, at least one sensor (200, 200 ') for measuring the surface speed of the roller (102, 103) is provided, said sensor being movable over the length of the roller (102, 103) by means of a movement device (216, 216'). The invention relates to a method for measuring the wear (Delta) of a roller (102, 103), comprising at least one sensor (200, 200 '), and at least one angular velocity meter (215, 215') which interacts with the shaft of the roller (102, 103), and at least one computing device (220) which is connected to the at least one sensor (200, 200 ') and to the at least one angular velocity meter (215, 215') and which scales the angular velocity of the roller (102, 103) to the surface velocity and calculates the wear (Delta) of the roller (102, 103) therefrom.

Description

Technical Field

[0001] The present invention relates to a device for measuring the wear of the rollers of a high-pressure roll press and a corresponding method for measuring such wear. Background Art

[0002] When observing the profile of the grinding rollers, a high-pressure roll press for crushing brittle grinding material undergoes bathtub-shaped wear. Here, the grinding rollers are more strongly material-removed due to wear in the middle of the profile than at the profile edges. The result of this non-uniform wear is that the roll gap between the two rollers can no longer be adjusted arbitrarily small in the middle, and the rollers draw the grinding material through there and crush it by pressure. Thereby, the high-pressure roll press loses its grinding effect. Before the grinding material is crushed finely enough, the grinding material has to pass through the high-pressure roll press more and more frequently in the worn state of the rollers. Therefore, the observation of the wear state of the high-pressure roll press is necessary in order to operate the industrial facility using the high-pressure roll press economically and in order to be able to plan the necessary maintenance measures, such as grinding or roller replacement, in advance. Summary of the Invention

[0003] Therefore, the object of the present invention is to provide a device and a method for measuring the wear of the rollers of a high-pressure roll press.

[0004] The object according to the invention is solved by a device for measuring the wear of the rollers of a high-pressure roll press having the features according to claim 1. Further advantageous design options of the device are specified in the dependent claims relative to claim 1.

[0005] The method object of the present invention is solved by a method for measuring the wear of the rollers of a high-pressure roll press having the features of claim 6. Further advantageous design options of the method are specified in the dependent claims relative to claim 6. Brief Description of the Drawings

[0006] The present invention is further illustrated by the following drawings. Among them:

[0007] Figure 1 A device according to the present invention for measuring the wear of the rollers installed in a high-pressure roll press is shown in a view from above towards the high-pressure roll press.

[0008] Figure 2 The device according to Figure 2 is shown in a view from the side towards the high-pressure roll press. Detailed Description of the Invention

[0009] In Figure 1Shown in a view from above towards the high-pressure roll press is a design of a device according to the invention for measuring the wear Δ of the rolls 102, 103 installed in the high-pressure roll press 100. The device for measuring the wear Δ of the rolls 102, 103 of the high-pressure roll press 100, which is exaggeratedly shown here, measures the wear Δ by the quotient of the surface speed of the rolls 102, 103 divided by the angular velocity of the rolls 102, 103 and thus calculates its circumference and thereby also its diameter. The device shown here has at least one motion device 216, 216′ running parallel to the roll axis and sensors 200, 200′ movable along the length of the rolls 102, 103 for measuring the surface speed of the rolls 102, 103, and at least one tachometer 215, 215′ cooperating with the axes of the rolls 102, 103. It is stipulated in this design that these two detectors are connected to at least one computing device 220. The computing device 220 establishes a proportional relationship between the measured angular velocity and the measured surface speed of the rolls 102, 103, and thereby calculates the wear Δ of the rolls 102, 103. In the embodiment shown here of the device, at least one sensor 200, 200′ is a laser sensor operating according to the differential Doppler method. Here, two laser beams incident at an angle to the optical axis are superimposed on the surface of the measuring object. For a point P moving through the intersection of the two laser beams at a speed v, the frequencies of the two laser beams are Doppler-shifted. The two laser beams are superimposed in the measuring volume, and an interference pattern of light and dark fringes is generated here. The fringe spacing Δs is a constant that depends on the laser wavelength λ and the angle

[0010]

[0011] between the measuring beams. If a particle moves through the fringe pattern, the light backscattered by it is modulated in intensity. The photoelectric receiver in the measuring head generates a signal whose frequency fD is directly proportional to the velocity component v of the surface in the measuring direction P , and the following applies:

[0012]

[0013] f D = Doppler frequency

[0014] v P = velocity vector in the measuring direction

[0015] Δs = fringe spacing in the measuring volume

[0016] The value constitutes a dimensional reference for velocity and length measurements.

[0017] In the design of the present invention, it can be stipulated that the angular velocity meter is a Hall effect sensor, which is excited via a magnet that moves relative to the Hall sensor or the Hall sensor moves relative to the magnet. If the Hall element is placed along a radially magnetized magnet, the rotating magnet generates a sinusoidal output voltage. The angular velocity can be determined very accurately by measuring the frequency.

[0018] In Figure 2 is shown in the form of facing the high-pressure roll press 100 from the side according to Figure 2 of the device. Here, the sensors for measuring the surface speeds of the rollers 102, 103 are located above the rollers 102, 103, next to the feed device 104 for the grinding material existing above the roll gap 105. In the illustration shown here, it is stipulated that the surfaces of the rollers 102, 103 are measured non-contact via a laser, where the laser beam is highlighted by a corresponding laser symbol.

[0019] List of reference numerals

[0020] 100 High-pressure roll press 202’ Guide rod

[0021] 101 Machine frame 210 Screw drive

[0022] 102 Roller 210’ Screw drive

[0023] 103 Roller 215 Angular velocity meter

[0024] 104 Feed device 215’ Angular velocity meter

[0025] 105 Roll gap 216 Movement device

[0026] 200 Sensor 216’ Movement device

[0027] 200’ Sensor 220 Calculation device

[0028] 201 Screw Δ Wear

[0029] 201’ Screw

[0030] 202 Guide rod

Claims

1. Device for measuring the wear (Δ) of the rollers (102, 103) of a high-pressure roll press (100), characterized in that - at least one sensor (200, 200') for measuring the surface speed of the rollers (102, 103) and which is movable along the length of the rollers (102, 103) by means of a movement device (216, 216'), and - at least one tachometer (215, 215') cooperating with the axis of the rollers (102, 103), - is connected to at least one computing device (220), wherein the computing device (220) correlates the angular speed of the rollers (102, 103) with the surface speed and thereby calculates the wear (Δ) of the rollers (102, 103).

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 screw drive.

4. Device according to claims 1 to 3, characterized in that the tachometer is a Hall sensor which is excited via a magnet, the magnet moving relative to the Hall sensor or the Hall sensor moving relative to the magnet.

5. Device according to any one of claims 1 to 4, characterized in that the computing device (220) is furthermore connected to the movement device (216, 216') such that the computing 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 (Δ) of the rollers (102, 103) of a high-pressure roll press (100), characterized in that measuring the surface speed of the rollers (102, 103) by means of at least one sensor (200, 200') movable along the length of the rollers (102, 103) by means of a movement device (216, 216'), measuring the angular speed of the rollers (102, 103) by means of at least one tachometer (215, 215') cooperating with the axis of the rollers (102, 103), and calculating the wear (Δ) of the rollers (102, 103) by means of at least one computing device (220), which computing device is in connection with the at least one sensor (200, 200') and the at least one tachometer (215, 215'), and which computing device correlates the angular speed of the rollers (102, 103) with the surface speed and thereby calculates the wear (Δ) of the rollers (102, 103).

7. Method according to claim 6, characterized in that the surface speed is measured by means of the differential Doppler method.

8. Method according to claim 6 or 7, characterized in that The at least one sensor (200, 200') is moved by means of a screw drive (210, 210').

9. The method according to any one of claims 6 to 8, characterized in that the surface speed is measured by means of a Hall sensor which is excited via a magnet, the magnet moving relative to the Hall sensor or the Hall sensor moving relative to the magnet.

10. The method according to claims 6 to 9, characterized in that a wear profile is calculated by means of a computing device (220), which computing device is furthermore connected to the movement device (216, 216'), such that the computing device (220) can detect the position of the at least one sensor (200, 200') and calculates the wear profile from the rotational speed, the surface speed and the position of the at least one sensor (200, 200').

Images