A rotor aluminum strip detection device and a rotor aluminum strip detection method

Abstract

The application relates to the technical field of motors, in particular to a rotor aluminum strip detection device and a detection method of a rotor aluminum strip. The rotor aluminum strip detection device comprises a rotating shaft for driving a rotor to rotate, one side of the rotating shaft is provided with a stator probe assembly, the stator probe assembly comprises a plurality of iron core pieces, the iron core pieces are provided with a missing slot, the iron core pieces are aligned and stacked, the missing slots after alignment form a slot opening channel, the slot opening channel can be aligned with a standard inclined slot angle of a rotor to be detected, a magnet is arranged in the slot opening channel and faces the slot opening channel, a receiving wire for sensing electromotive force is wound on the stacked iron core pieces, and the receiving wire points to the magnet. The rotor aluminum strip detection device can accurately and quickly judge whether the inclined slot angle of the rotor aluminum strip and the fullness of the rotor aluminum strip meet the production standard.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a rotor aluminum bar detection device and a rotor aluminum bar detection method. Background Art

[0002] During motor rotor production, beveled slots are stamped into the core. Currently, manual inspection is primarily used to determine whether the rotor slot angles meet requirements. However, this lack of rigor in manual inspections leads to frequent quality incidents caused by abnormal rotor slot angles. Furthermore, since the rotor is cast aluminum, air gaps may occur. Therefore, manual inspection is also required to determine the rotor's fullness, a process that currently relies on manual labor. Summary of the Invention

[0003] One of the purposes of the present invention is to avoid the deficiencies in the prior art and provide a rotor aluminum bar detection device, which can accurately and quickly determine whether the skew angle of the rotor aluminum bar and the fullness of the rotor aluminum bar meet the production standards.

[0004] A second object of the present invention is to provide a method for detecting aluminum bars of a rotor.

[0005] To achieve one of the above objectives, the present invention provides the following technical solutions:

[0006] A rotor aluminum bar detection device is provided, comprising a rotating shaft for driving a rotor to rotate, a stator probe assembly provided on one side of the rotating shaft, the stator probe assembly comprising a plurality of core sheets, each of which is provided with a slot. The core sheets are aligned and stacked, and the aligned slots form a slot channel. The slot channel can be aligned with a standard skew angle of the rotor to be tested. A magnet is provided in the slot channel, the magnet facing the slot channel. A receiving line for induced electromotive force energy is wound around the stacked core sheets, the receiving line pointing toward the magnet.

[0007] In some embodiments, a frame is provided between the rotating shaft and the slot channel, the frame is engraved with a scale, the scale is provided with a pointer, one end of the pointer points to the scale, and the other end is fixedly connected to the end of the stator probe assembly, the pointer drives the stator probe assembly to rotate so as to adjust the inclination angle of the slot channel.

[0008] In some embodiments, the pointer is located in front of the slot, and the length direction of the pointer is the same as the length direction of the slot.

[0009] In some embodiments, the stator probe assembly further includes a cylindrical shell, the core sheet is fixed in the cylinder, the notch is located on one end surface of the cylinder, and the cylinder is mounted on an angle rotation mechanism.

[0010] In some embodiments, the angle rotation mechanism includes a base, the base is provided with an arc-shaped groove surface, the side of the cylindrical shell is placed on the arc-shaped groove surface, the other end face of the cylinder is fixed with a bearing, the bearing, the cylindrical shell and the pointer are linked together, and the bearing is provided with a rotating locking member.

[0011] In some embodiments, the rotation locking member includes a fixing sleeve that is sleeved on the outside of the rotating shaft and fixed to the end face of the cylindrical shell, and a pin is inserted into the fixing sleeve. The pin passes through the fixing sleeve and can be inserted into the side face of the bearing.

[0012] In some embodiments, a knob is provided at an outer end of the bearing.

[0013] In some embodiments, a cylinder is connected to the base, and the cylinder drives the stator probe assembly to move closer to or away from the rotor to be measured.

[0014] In some embodiments, the rotating shaft is connected to a driving motor.

[0015] Beneficial effects of the rotor aluminum bar detection device of the present invention:

[0016] (1) The rotor aluminum bar detection device of the present invention is based on the relevant principles of electromagnetism. It uses the changes in the induced electromotive force generated by the cutting action between the magnetic flux lines of a magnet and the bevel of the rotor aluminum bar to determine whether the bevel of the rotor aluminum bar meets the standards and whether the rotor aluminum bar has an air gap. If the rotor aluminum bar to be tested meets the standards, the induced electromotive force generated by the closed conductor when vertically cutting the magnetic flux lines is the largest, and the voltage obtained at this time is the largest. If the bevel of the rotor aluminum bar to be tested does not meet the standards or an air gap appears in the rotor, the magnetic flux lines are not cut vertically, and the induced electromotive force generated becomes smaller. The collected induced electromotive force is processed by the linear fitting method in the field of mathematics to obtain a test waveform diagram and analyze it to deduce whether the bevel angle of the rotor aluminum bar is qualified and determine the saturation of the rotor aluminum bar.

[0017] (2) The rotor aluminum bar detection device of the present invention can accurately and quickly determine whether the skew angle of the rotor aluminum bar and the fullness of the rotor aluminum bar meet the production standards without manual judgment, thereby avoiding manual judgment errors and being suitable for large-scale production applications.

[0018] To achieve the second of the above objectives, the present invention provides the following technical solutions:

[0019] A method for detecting rotor aluminum bars is provided, using the above-mentioned rotor aluminum bar detection device. The detection method comprises the following steps:

[0020] S1. Insert the rotor to be tested onto the shaft so that the notch of the stator side head assembly faces the side of the rotor to be tested;

[0021] S2. Adjust the inclination angle of the slot channel in the stator side head assembly to align it with the standard slot angle of the rotor to be tested;

[0022] S3, connecting the receiving line to a signal receiver, driving the rotating shaft to rotate and driving the rotor to be measured to rotate;

[0023] S4, the magnetic flux lines generated by the magnets in the core piece cut the skew slots in the rotor to be measured, and the receiving line collects the induced electromotive force energy generated by the rotor to be measured cutting the magnetic flux lines;

[0024] S5. Statistically analyze the collected induced electromotive force and output the test results, and determine the abnormal conditions of the rotor aluminum bar skew angle and fullness based on the test results.

[0025] Beneficial effects of the rotor aluminum bar detection method of the present invention:

[0026] The rotor aluminum bar detection method of the present invention relies on the change of magnetic flux lines to judge whether the skew angle of the rotor aluminum bar and the fullness of the rotor aluminum bar meet the production standards, without the need for manual judgment, and has the advantages of high efficiency and high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 4 is a front view of a rotor aluminum bar detection device according to an embodiment.

[0028] Figure 2 4 is a side view of a rotor aluminum bar detection device according to an embodiment.

[0029] Figure 3 2 is a working state diagram of the pointer and scale of the embodiment.

[0030] Figure 4 This is a working state diagram of the iron core, slots, magnets and receiving wires in the rotor to be measured and the stator probe assembly.

[0031] Reference numerals

[0032] Rotating shaft 1; stator probe assembly 2; iron core piece 3; notch 4; notch channel 5; magnet 6; receiving line 7; frame 8; scale 9; pointer 10; cylindrical shell 11; base 12; arc-shaped groove surface 13; bearing 14; fixing sleeve 15; pin 16; knob 17; cylinder 18; drive motor 19; rotor to be measured 20; inclined slot 21. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0034] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "an," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0035] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0036] Example 1

[0037] This embodiment discloses a rotor aluminum bar detection device, Figure 1-Figure 4 As shown in FIG. 1 , the rotor comprises a rotating shaft 1 for driving the rotor to rotate, and a stator probe assembly 2 is provided on one side of the rotating shaft 1 . Figure 4 As shown, the stator probe assembly 2 includes a plurality of core sheets 3, each of which is provided with a notch 4. The core sheets 3 are aligned and stacked, and the aligned notches 4 form a notch channel 5. The notch channel 5 can be aligned with the angle of the standard skew slot 21 of the rotor 20 to be measured. A magnet 6 is provided in the notch channel 5, and the magnet 6 faces the notch channel 5. A receiving wire 7 for induced electromotive force energy is wound around the stacked core sheets 3, and the receiving wire 7 points to the magnet 6.

[0038] The iron core sheets 3 are stacked to form a slot channel 5, which facilitates the transmission of magnetic flux lines in the magnet 6 to the inclined slots 21 of the aluminum bars of the rotor 20 to be tested, thereby cutting the inclined slots 21, and the receiving line 7 collects the changing state of the magnetic flux lines.

[0039] In this embodiment, Figure 1-Figure 3As shown, a frame 8 is provided between the rotating shaft 1 and the slotted channel 5. A scale 9 is engraved on the frame 8. The scale 9 is equipped with a pointer 10. One end of the pointer 10 points to the scale 9, and the other end is fixedly connected to the end of the stator probe assembly 2. The pointer 10 drives the stator probe assembly 2 to rotate, thereby adjusting the tilt angle of the slotted channel 5. Because the pointer 10 is fixed to the stator probe assembly 2, moving the pointer 10 can drive the probe assembly to move, thereby adjusting the tilt angle of the slotted channel 5. This ensures that the tilt angle of the slotted channel 5 is consistent with the angle of the standard skewed slot 21 of the rotor 20 to be tested, facilitating subsequent determination that the rotor 20 to be tested does not conform to the standard skewed slot 21 of the tester. The combination of the pointer 10 and the scale 9 allows for accurate and rapid adjustment of the tilt angle of the slotted channel 5, improving the convenience of testing.

[0040] In this embodiment, Figure 2 As shown, the pointer 10 is located in front of the slot 5 , and the length direction of the pointer 10 is the same as the length direction of the slot 5 .

[0041] In this embodiment, Figure 1-Figure 2 As shown, the stator probe assembly 2 also includes a cylindrical housing 11, within which the core sheet 3 is secured. The slotted channel 5 is located on one end surface of the cylinder, which is mounted on an angle rotation mechanism. During use, the slotted channel 5 can be rotated by rotating the cylinder, facilitating adjustment of the inclination angle of the slotted channel 5.

[0042] In this embodiment, Figure 1-Figure 2 As shown, the angle rotation mechanism includes a base 12 with an arcuate groove 13 formed thereon. The side surface of the cylindrical housing 11 rests on the arcuate groove 13. A bearing 14 is fixedly connected to the other end face of the cylinder. The bearing 14, the cylindrical housing 11, and the pointer 10 are linked together, and the bearing 14 is equipped with a rotation locking member. During use, the cylindrical housing 11 can be rotated by rotating the bearing 14. Since the pointer 10 is fixed to the cylindrical housing 11, this drives the pointer 10 to rotate, thereby facilitating the adjustment of the tilt angle of the notch 5.

[0043] In this embodiment, Figure 1-Figure 2 As shown, the rotation locking member includes a fixing sleeve 15 that is sleeved on the outside of the rotating shaft 1 and fixedly connected to the end surface of the cylindrical housing 11. A pin 16 is inserted into the fixing sleeve 15. The pin 16 passes through the fixing sleeve 15 and can be inserted into the side of the bearing 14. During use, the pin 16 is pulled out to rotate the rotating shaft 1, at which time the pointer 10 and the inclination angle of the slot 5 can be adjusted. The pin 16 is inserted to fix the rotating shaft 1, thereby preventing the slot 5 from swinging.

[0044] In this embodiment, Figure 1-Figure 2As shown, a knob 17 is provided at the outer end of the bearing 14 , and the knob 17 facilitates the rotation of the shaft 1 .

[0045] In this embodiment, Figure 2 As shown, the base 12 is connected to a cylinder 18, which drives the stator probe assembly 2 to move closer to or away from the rotor 20 to be measured. The cylinder 18 drives the distance of the stator probe assembly 2, thereby facilitating the movement of the measuring assembly and improving the convenience of detection.

[0046] In this embodiment, Figure 2 As shown, the rotating shaft 1 is connected to a driving motor 19. The driving motor 19 is used to drive the rotating shaft 1 to rotate, thereby driving the rotor 20 to be measured to rotate.

[0047] Example 2

[0048] This embodiment discloses a method for detecting rotor aluminum bars. Figure 1-Figure 4 As shown, the rotor aluminum bar detection device described in Example 1 is used, and the detection method includes the following steps:

[0049] S1. Insert the rotor 20 to be tested onto the rotating shaft 1, with the notch 5 of the stator side head assembly facing the side of the rotor 20 to be tested;

[0050] S2. Adjust the inclination angle of the slot channel 5 in the stator side head assembly so that it is aligned with the standard skew slot 21 of the rotor 20 to be tested;

[0051] S3, connecting the receiving line 7 to a signal receiver, driving the rotating shaft 1 to rotate and driving the rotor 20 to be measured to rotate;

[0052] S4, the magnetic flux lines generated by the magnet 6 in the core piece 3 cut the skew slots 21 in the rotor 20 to be tested, and the receiving line 7 collects the induced electromotive force energy generated by the rotor 20 to be tested cutting the magnetic flux lines;

[0053] S5. Statistically analyze the collected induced electromotive force and output the test results, and determine the abnormal conditions of the angle and fullness of the rotor aluminum bar skew slot 21 based on the test results.

[0054] Among them, the collected induced electromotive force is processed using the linear fitting method in the field of mathematics to obtain a test waveform and analyze it. Based on the test waveform, it is calculated whether the angle of the rotor aluminum bar's inclined slot 21 is qualified and the saturation of the rotor is determined, thereby achieving simultaneous detection.

[0055] Finally, it should be noted that, unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of this application. At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be considered as part of the authorization specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as being merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0056] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0059] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A rotor aluminum bar detection device, characterized by: The invention comprises a rotating shaft for driving the rotor to rotate, a stator probe assembly being provided on one side of the rotating shaft, the stator probe assembly comprising a plurality of iron core sheets, each of which is provided with a slot. The iron core sheets are aligned and stacked, and the aligned slots form a slot channel, which can be aligned with the standard skew angle of the rotor to be measured. A magnet is provided in the slot channel, and the magnet faces the slot channel. A receiving line for induced electromotive force energy is wound around the stacked iron core sheets, and the receiving line points to the magnet.

2. The rotor aluminum bar detection device according to claim 1, characterized in that: A frame is provided between the rotating shaft and the slot channel, the frame is engraved with a scale, the scale is provided with a pointer, one end of the pointer points to the scale, and the other end is fixedly connected to the end of the stator probe assembly, the pointer drives the stator probe assembly to rotate so as to adjust the inclination angle of the slot channel.

3. The rotor aluminum bar detection device according to claim 2, characterized in that: The pointer is located in front of the slot, and the length direction of the pointer is the same as the length direction of the slot.

4. The rotor aluminum bar detection device according to claim 3, characterized in that: The stator probe assembly further includes a cylindrical shell, the core piece is fixed in the cylinder, the notch is located on one end surface of the cylinder, and the cylinder is mounted on an angle rotation mechanism.

5. The rotor aluminum bar detection device according to claim 4, characterized in that: The angle rotation mechanism includes a base, which is provided with an arc-shaped groove surface. The side of the cylindrical shell is placed on the arc-shaped groove surface. The other end face of the cylinder is fixed with a bearing. The bearing, the cylindrical shell and the pointer are linked together, and the bearing is provided with a rotating locking piece.

6. The rotor aluminum bar detection device according to claim 5, characterized in that: The rotating locking member includes a fixing sleeve which is sleeved on the outside of the rotating shaft and fixed to the end surface of the cylindrical shell. A pin is inserted into the fixing sleeve. The pin passes through the fixing sleeve and can be inserted into the side surface of the bearing.

7. The rotor aluminum bar detection device according to claim 6, characterized in that: The outer end of the bearing is provided with a knob.

8. The rotor aluminum bar detection device according to claim 5, characterized in that: The base is connected to a cylinder, which drives the stator probe assembly to move closer to or away from the rotor to be measured.

9. The rotor aluminum bar detection device according to claim 1, characterized in that: The rotating shaft is connected with a driving motor.

10. A method for detecting rotor aluminum bars, characterized by: Using the rotor aluminum bar detection device according to any one of claims 1 to 9, the detection method comprises the following steps: S1. Insert the rotor to be tested onto the shaft so that the notch of the stator side head assembly faces the side of the rotor to be tested; S2. Adjust the inclination angle of the slot channel in the stator side head assembly to align it with the standard slot angle of the rotor to be tested; S3, connecting the receiving line to a signal receiver, driving the rotating shaft to rotate and driving the rotor to be measured to rotate; S4, the magnetic flux lines generated by the magnets in the core piece cut the skew slots in the rotor to be measured, and the receiving line collects the induced electromotive force energy generated by the rotor to be measured cutting the magnetic flux lines; S5. Statistically analyze the collected induced electromotive force and output the test results, and determine the abnormal conditions of the rotor aluminum bar skew angle and fullness based on the test results.

Images