Device for measuring the wear of a roller of a high-pressure roller press
The device measures roller wear in high-pressure roller presses using sensors to calculate circumference and diameter, addressing uneven wear issues and enhancing operational efficiency through precise gap adjustment.
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Patents
- Current Assignee / Owner
- KHD HUMBOLDT WEDAG GMBH
- Filing Date
- 2023-12-19
- Publication Date
- 2026-07-01
Smart Images
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Abstract
Description
[0001] 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.
[0002] High-pressure roller presses for grinding brittle materials are subject to a bathtub-shaped wear pattern when examining the profile of a grinding roller. The center of the profile experiences greater wear than the edges. As a result of this uneven wear, the gap between the two rollers, which pull the material between them and grind it under pressure, can no longer be adjusted to an arbitrarily small size in the center. This reduces the grinding efficiency of the high-pressure roller press. With worn rollers, the material must pass through the high-pressure roller press more and more frequently before it is ground to a sufficiently fine consistency.Monitoring the wear condition of a high-pressure rolling press is therefore necessary to operate industrial plants that use this type of press economically and to plan necessary maintenance measures, such as grinding or roll replacement, in a timely manner. EP 0 509 809 A2 discloses a device for measuring the wear of a roll of a high-pressure rolling press, wherein a sensor, movable along the length of the roll by a movement device, is used to measure the distance to the roll surface.
[0003] 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.
[0004] The problem according to the invention is solved by a device for measuring the wear of a roller of a high-pressure roller press with the features according to claim 1. Further advantageous embodiments of the device are specified in the dependent claims to claim 1.
[0005] The problem of the process according to the invention is solved by a method for measuring the wear of a roller of a high-pressure roller press with the features according to claim 6. Further advantageous embodiments of the method are specified in the dependent claims to claim 6.
[0006] The invention is explained in more detail with reference to the following figures. They show: 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 top view of the high-pressure roller press. Fig. 2 shows the device made of Figure 2 in one from the side onto the high-pressure roller press.
[0007] In Figure 1 Figure 1 shows an embodiment of a device according to the invention for measuring the wear Δ of a roller 102, 103 of a high-pressure roller press 100, which is installed in a high-pressure roller press 100, in a top view of the high-pressure roller press 100. The device for measuring the wear Δ of a roller 102, 103 of a high-pressure roller press 100, which is exaggerated here, measures the wear Δ from the quotient of the surface velocity and the angular velocity of the roller 102, 103 and thus calculates its circumference and therefore also its diameter. The device shown here has at least one sensor 200, 200' movable by means of 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 sensor 215, 215' cooperating with a shaft of the roller 102, 103.
[0008] In this embodiment, these two detectors are connected to at least one computer 220. This computer 220 relates the measured angular velocity of the roller 102, 103 to the measured surface velocity and calculates the wear Δ 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 φ to the optical axis, are superimposed on the surface of the object being measured. For a point P moving at velocity v through the intersection of the two laser beams, the frequencies of the two laser beams are Doppler-shifted. The two laser beams superimpose in the measurement volume, thereby generating an interference pattern of light and dark fringes.The fringe spacing Δs is a constant that depends on the laser wavelength λ and the angle between the measuring beams 2φ: . Δs = λ 2 sin φ
[0009] As a particle moves through the striped pattern, the intensity of the light it scatters back is modulated. A photodetector in the measuring head generates a signal whose frequency fD is directly proportional to the velocity component of the surface in the measurement direction vp, and the following applies: f D = v p / Δs = 2 v / λ sin φ f D = Doppler frequency vp = velocity vector in the measurement direction Δs = fringe spacing in the measurement volume
[0010] The value λ / sin φ forms the standard for measuring speed and length.
[0011] In an embodiment of the invention, the angular velocity sensor can be a Hall effect sensor that is 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 accurately.
[0012] In Figure 2 is the device made of Figure 1The diagram shows a side view of the high-pressure roller press 100. The sensor for measuring the surface velocity of the rollers 102, 103 is located above the rollers 102, 103, next to a feed device 104 for regrind material located above a roller gap 105. In this illustration, the surface of the rollers 102, 103 is measured contactlessly using a laser, with the laser beam highlighted by a corresponding laser symbol. REFERENCE MARK LIST
[0013] 100 High-pressure roller press 202' guide rod 101 machine frame 210 Spindle drive 102 roller 210' Spindle drive 103 roller 215 Angle velocity meter 104 Feed device 105 Roller gap 215' Angle velocity meter 216 Motion device 200 sensor 216' Motion device 200' sensor 201 spindle 220 Computer device 201' spindle Δ wear 202 guide rod
Claims
1. Device for measuring the wear (Δ) 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 over the length of the roller (102, 103) by means of a movement device (216, 216'), for measuring the surface velocity 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) is designed to form the ratio of the angular velocity of the roller (102, 103) to the surface velocity and from this to calculate the wear (Δ) of the roller (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 spindle drive.
4. Device according to Claim 1 to 3 characterized in that the angular velocity meter is a Hall sensor, which is excited by a magnet that moves relative to the Hall sensor or vice versa.
5. Device according to any of Claims 1 to 4, characterized in that computer device (220) is additionally 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 computes a wear profile from the rotational speed, the surface velocity and from the position of the at least one sensor (200, 200').
6. Method for measuring the wear (Δ) of a roller (102, 103) of a high-pressure roller press (100), characterized by measuring the surface velocity of the roller (102, 103) with at least one sensor (200, 200'), which can be moved over the length of the roller (102, 103) by means of a movement device (216, 216'), measuring the angular velocity of the roller (102, 103) using at least one angular velocity meter (215, 215'), which interacts with a shaft of the roller (102, 103), and calculating the wear (Δ) of the roller (102, 103) with at least one computer 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 forms the ratio of the angular velocity of the roller (102, 103) to the surface velocity and from this calculates the wear (Δ) of the roller (102, 103).
7. Method according to Claim 6 characterized by measuring the 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') using a spindle drive (210, 210')9. Method according to any of Claims 6 to 8, characterized by measuring the surface velocity using a Hall sensor, which is excited by a magnet that moves relative to the Hall sensor or vice versa.
10. Method according to Claim 6 to 9, characterized by calculating a wear profile, computed by means of a computer device (220) which is additionally 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 computes a wear profile from the rotational speed, the surface velocity and from the position of the at least one sensor (200, 200').