System having a rotor and a hardness testing device for testing the hardness of the rotor as a test sample

Abstract

A system with a rotor and a hardness testing device for testing the rotor as a test specimen, wherein the hardness testing device has a measuring unit, a probe of the measuring unit being movable in a radial direction towards a first rotor shaft section of the rotor projecting axially out of the rotor and in which the hardness of the rotor material can be determined by the measuring unit. The hardness testing device has a support unit, wherein the support unit has a support plate with a recess, wherein a second rotor shaft section of the rotor projecting axially out of the rotor is located on the support plate in the recess, wherein the support plate is fixed at a locking device of the support unit, the locking device being movable along a guide rail of the support unit.

Description

Technical Field

[0001] This utility model relates to a system having a rotor and a device for detecting the hardness of the rotor used as a sample. Background Technology

[0002] It is generally known that during hardness testing, the probe is moved toward the sample and the sample is kept stationary during the measurement. Utility Model Content

[0003] Therefore, the purpose of this invention is to avoid or at least reduce interference when testing the hardness of a sample.

[0004] According to this invention, this objective is achieved by a system having a rotor and a hardness testing device for detecting the rotor used as a sample.

[0005] A key feature of this invention is that the system includes a rotor and a hardness testing device for testing the rotor used as a sample. The hardness testing device has a measuring unit whose probe can move radially, particularly with respect to the rotor's central axis or rotation axis, toward a first rotor shaft section that protrudes axially from the rotor. At this point, the measuring unit can determine the hardness of the rotor material, particularly the hardness grade and / or hardening depth. The hardness testing device also has a support unit with a support plate having a recess, particularly a notch. A second rotor shaft section protruding axially from the rotor is supported / aggregated against the support plate in the recess. The support plate is fixed to a locking device of the support unit, which can move along the guide rail of the support unit, especially when the locking device is released.

[0006] The advantage here is that the sample is stably supported during hardness testing, and therefore the test can be performed without interference. Importantly, the rotor shaft has two axially projecting sections that are stably received and can be horizontally oriented in a simple manner. For this purpose, the rotor is supported not only by the measuring unit but also by the support unit, and thus is axially supported on both sides.

[0007] The recess allows for precise and stable reception of the second rotor shaft section, and the lockable height adjustment device enables the rotor to be fixedly oriented horizontally.

[0008] In one advantageous design, the guide rail is oriented vertically. This allows for easy adjustment of the support height and fixation in a horizontal orientation.

[0009] In one advantageous design, the guide rail is designed or fixed to the support profile of the support unit, which is connected to the base plate of the hardness testing device. The advantage here is that high stability can be achieved.

[0010] In one advantageous design, the measuring unit is connected to the base plate. The advantage of this is that high stability can be achieved.

[0011] In an advantageous design, the probe is arranged to be movable, particularly linearly, relative to the measuring unit. This allows the probe to move toward the first rotor shaft section, thus enabling hardness testing.

[0012] In an advantageous design, the probe has an eddy current sensor or ultrasonic sensor, particularly for non-destructive testing, or an indenter probe that is pressed into the first rotor shaft section in the event of material deformation. The advantage here is that hardness can be determined in a simple manner.

[0013] In one advantageous design, the position of the support plate is fixed when the locking device is activated. This provides the advantage of high stability.

[0014] In an advantageous design, the rotor has a rotor shaft and an active component connected to the rotor shaft in a manner that prevents relative rotation, wherein the active component has a permanent magnet and / or a short-circuit cage. The advantage here is that hardness testing can be performed on a rotor shaft section with a small diameter without probe slippage because the rotor is stably supported.

[0015] In an advantageous design, the area covered by the rotor shaft in the axial direction includes the area covered by the driving component in the axial direction. The advantage here is that the rotor shaft protrudes from the driving component on both axial sides.

[0016] In one advantageous design, the first rotor shaft section rests against and / or is supported on the measuring unit. The advantage here is that high stability can be achieved.

[0017] In an advantageous design, the rotor shaft's axis of rotation or central axis is oriented horizontally. This has the advantage of achieving orientation stability and thus enabling interference-free hardness measurement.

[0018] In an advantageous design, the rotor can be used as the rotor of an electric motor, wherein the rotor shaft can be rotatably supported in the motor housing by means of rolling bearings. An advantage here is that hardness testing can be stably performed on cylindrical parts.

[0019] The radial direction is based on the rotation axis or central axis of the rotor shaft, the circumferential direction is based on the rotation axis or central axis of the rotor shaft, and the axial direction is parallel to the rotation axis or central axis of the rotor shaft.

[0020] In an advantageous design, the locking device includes a motor for moving the locking device along a guide rail. Specifically, the motor is powered by a secondary winding, with a capacitor connected in series and / or parallel to the secondary winding. The resulting oscillating circuit has a resonant frequency equal to the frequency of the alternating current applied to the primary conductor laid along the guide rail. This design allows for automatic height adjustment.

[0021] In an advantageous design, the support plate is electrically insulated from the locking device, particularly by placing an electrical insulator in the middle. This allows the support plate to be used for height detection.

[0022] In an advantageous design, the contact plate is fixed to the support plate and arranged to be electrically insulated from the support plate, particularly by means of an electrical insulator placed in the middle. The contact plate has recesses of the same design as those on the support plate, particularly punched openings, wherein these two recesses are arranged to be aligned with each other in the horizontal direction, and in particular, the recesses can overlap each other by horizontal movement. The advantage here is that it is possible to identify whether a horizontal position has been reached and whether the motor can be cut off during startup.

[0023] In one advantageous design, the system's control unit operates the motor based on the ohmic resistance detected between the contact plate and the support plate. The advantage here is that the motor can be automatically and easily reached in a horizontal position.

[0024] This invention is not limited to the claimed combination of features. Other reasonable combinations of features disclosed in this application are possible for those skilled in the art, particularly for purposes proposed and / or proposed by comparison with the prior art. Attached Figure Description

[0025] The present invention will now be described in detail with reference to the schematic diagram:

[0026] exist Figure 1 The side sectional view shows a hardness testing device according to the present invention, which has a support unit for the sample, schematically shown.

[0027] exist Figure 2 The support unit is shown in a slanted view.

[0028] exist Figure 3 Zhongyu Figure 1An additional contact plate 30 is provided to enable automatic height adjustment for reaching the horizontal position of the sample, as illustrated in the diagram. Detailed Implementation

[0029] As shown in the figure, the hardness testing device for testing the rotor 3 of the motor used as a sample has a measuring unit 2, whose probe 1 is pressed radially along the central axis or rotation axis of the rotor 3 onto the first rotor shaft section 9 of the rotor 3, which protrudes axially from the rotor 3, and the material hardness of the rotor 3 is measured by the measuring unit 2 at this time.

[0030] Alternatively, a non-contact measurement system is used, such as by means of an eddy current sensor or an ultrasonic sensor, to determine the hardening depth and / or hardness level of the rotor 3.

[0031] The hardness testing device also includes a support unit, which has a support plate 4 arranged in a height-adjustable manner.

[0032] For this purpose, the support unit has a support profile 7 arranged on the base plate 10 of the hardness testing device, and a guide rail 6, preferably vertically oriented, is fixed at the support profile. When the locking device is released, the locking device can be guided along the guide rail 6. By activating the locking device 5, the position, especially the height position, of the locking device and the support plate 4, which is also fixed at the locking device 6, can be fixed.

[0033] Preferably, the locking device 6, together with the support plate 4, is positioned at a height that enables the rotor 3 to be horizontally oriented.

[0034] Therefore, according to this invention, hardness testing can be carried out without interference, as the sample is horizontally oriented and mechanically fixed without needing to be stabilized by hand.

[0035] The second rotor shaft section 9 of the rotor 3 extends out from the rotor 3 in the opposite direction to the axial direction, and the rotor shaft section is located on / supported on the recess 20 of the support plate 4.

[0036] Preferably, the recess 20 is configured to shrink as the distance from the base plate 10 decreases. Therefore, the net width of the recess 20, particularly when measured in the horizontal direction, decreases monotonically as the distance from the base plate 10 decreases.

[0037] In particular, the rotor 3 can be fixed by gravity in this way, and thus the detection of hardness and / or hardening depth can be performed safely and without interference.

[0038] In another embodiment of the present invention, the support unit has an electrically driven height adjustment device. For this purpose, the locking device has a motor that drives a pinion gear via a reducer. The pinion gear meshes with a rack oriented parallel to the guide rail, thereby enabling the locking device to reciprocate along the guide rail electrically. In an improved embodiment, the motor can be supplied inductively by fixing a primary conductor, which is parallel to the guide rail 6 and loaded with a medium-frequency alternating current, onto the guide rail 6. A secondary winding, inductively coupled to the primary conductor, is arranged at the locking device. The secondary winding supplies power to a rectifier, which in turn supplies power to the motor. Here, a capacitor is connected in series and / or in parallel with the secondary winding, wherein the capacitor is designed such that the oscillation frequency of the oscillation circuit formed by the capacitor and the secondary winding is equal to the frequency of the alternating current applied to the primary conductor.

[0039] Therefore, using an eddy current sensor is particularly effective because the geometry and material of the first rotor shaft section are preset, and only the hardness method used needs to be checked during hardness testing. Thus, it is only necessary to compare the signal detected by the eddy current sensor during sample measurement with previously stored good signals.

[0040] According to Figure 3 In one embodiment, a contact plate 30 is additionally fixed to the support plate 4, and the contact plate is electrically insulated from the support plate 4 by an intermediately arranged electrical insulator. Therefore, automatic horizontal orientation of the rotor shaft can be achieved by the motor continuously moving the locking device upwards until the steel rotor shaft, especially the second steel rotor shaft section 8, contacts both plates—that is, not only the support plate 4 but also the contact plate 30—and thus establishes electrical contact, causing the resistance between the two plates to change from at least a high (especially non-high) resistance value to a low resistance value. For this purpose, it is advantageous that the contact plate 30 has recesses of the same design as the recesses, wherein the two recesses are arranged to be aligned with each other in the horizontal direction and / or overlap / coincide with each other.

[0041] Furthermore, it is advantageous to have the two plates with the smallest possible thickness and very high rigidity.

[0042] In another embodiment according to the present invention, the recess 20 is implemented as a punched notch, particularly a V-shaped or rounded V-shaped punched notch. Thus, the support plate 4 is implemented as a plate, preferably a stamped and bent piece.

[0043] List of reference numerals

[0044] 1 probe

[0045] 2 Measurement Units

[0046] 3 rotors

[0047] 4 support plates

[0048] 5 locking devices

[0049] 6 guide rails

[0050] 7 Supporting profiles

[0051] 8 Second rotor shaft section

[0052] 9 First rotor shaft section

[0053] 10 base plate

[0054] 20 concavities

[0055] 30 contact plate

Claims

1. A system having a rotor and a device for detecting the hardness of the rotor used as a sample, Its features are, The hardness testing device includes a measuring unit whose probe can move radially along the rotor's central axis or rotation axis toward the first rotor shaft section that protrudes axially from the rotor. The measuring unit can determine the hardness of the rotor material. The hardness testing device includes a support unit. The support unit includes a support plate with a recess. Specifically, the second rotor shaft section, which protrudes axially from the rotor, is supported on a support plate within a recess. The support plate is fixed to the locking device of the support unit, which can move along the guide rail of the support unit when the locking device is released.

2. The system according to claim 1, characterized in that, The guide rail is oriented vertically.

3. The system according to claim 1 or 2, characterized in that, The guide rail is designed or fixed on the support profile of the support unit, which is connected to the base plate of the hardness testing device.

4. The system according to claim 3, characterized in that, The measuring unit is connected to the base plate.

5. The system according to claim 1 or 2, characterized in that, The probe is arranged to move relative to the measurement unit.

6. The system according to claim 1 or 2, characterized in that, The probe has an eddy current sensor or an ultrasonic sensor for non-destructive testing, or a pressure probe that is pressed into the first rotor shaft section in the event of material deformation.

7. The system according to claim 1 or 2, characterized in that, When the locking device is activated, the position of the support plate is fixed.

8. The system according to claim 1 or 2, characterized in that, The rotor has a rotor shaft and an active component connected to the rotor shaft in a manner that prevents relative rotation, wherein the active component has a permanent magnet and / or a short-circuit cage.

9. The system according to claim 8, characterized in that, The area covered by the rotor shaft in the axial direction includes the area covered by the active component in the axial direction, and / or the first rotor shaft section abuts against and / or is supported at the measuring unit, and / or the rotation axis or central axis of the rotor shaft is oriented horizontally.

10. The system according to claim 1 or 2, characterized in that, The rotor can be used as the rotor of an electric motor, wherein the rotor shaft can be rotatably supported in the motor housing by means of rolling bearings.

11. The system according to claim 9, characterized in that, The radial direction is based on the rotation axis or central axis of the rotor shaft, and / or the circumferential direction is based on the rotation axis or central axis of the rotor shaft, and / or the axial direction is oriented parallel to the rotation axis or central axis of the rotor shaft.

12. The system according to claim 1 or 2, characterized in that, The locking device has a motor for moving the locking device along a guide rail, wherein the motor is powered by a secondary winding and a capacitor is connected in series and / or in parallel with the secondary winding, so that the resonant frequency of the oscillating circuit thus formed is equal to the frequency of the alternating current applied to the primary conductor laid along the guide rail.

13. The system according to claim 1 or 2, characterized in that, The support plate is electrically insulated from the locking device by an electrical insulator arranged in the middle.

14. The system according to claim 1 or 2, characterized in that, The contact plate is fixed to the support plate and is electrically insulated from the support plate by means of an electrical insulator arranged in the middle, wherein the contact plate has a recess with the same design as the recess of the support plate, wherein the two recesses are arranged to be aligned with each other in the horizontal direction and can overlap each other by horizontal movement.

15. The system according to claim 1 or 2, characterized in that, The system's control unit operates the motor based on the ohmic resistance detected between the contact plate and the support plate.

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