Magnetic coupling shafting torsional vibration experiment device

Abstract

The invention provides a magnetic coupling shafting torsional vibration experiment device which comprises an experiment base and a long shaft located above the experiment base, and a first support with a limiting sleeve and a second support with a limiting sleeve are fixedly connected to the experiment base. The magnetic coupling energy generator works, under the magnetic coupling effect, the driving rod drives the transmission shaft to twist, the long shaft is further driven, and bending-twisting motion trails and rotation angle data are measured and recorded in real time in cooperation with the monitoring assembly comprising the first displacement sensor, the second displacement sensor and the angle encoder. Motion characteristics under different conditions are obtained, the magnetic coupling energy generator is adjusted to enable the long shaft to perform bending and torsion motion, and different bending and torsion motion parameters are obtained by changing attributes of the magnetic coupling energy generator. According to recorded bending-torsional vibration data under different conditions, analysis and comparison are carried out, so that torsional vibration detection of the shaft system is realized, and the accuracy requirement of torsional vibration detection of the shaft system is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of torsional vibration testing, in particular to a magnetic coupling shafting torsional vibration experimental device. BACKGROUND

[0002] Torsional vibration is a common form of mechanical vibration in mechanical systems. In many fields such as aviation, aerospace, power, machinery, etc., torsional vibration is a problem that cannot be ignored. The instantaneous speed of the parts of the system rotor varies during rotation, causing torsion between the parts, which can easily cause damage to the system components, so it is necessary to detect and control the size of the torsional vibration of the shafting. If the detection of the torsional vibration of the shafting is not accurate, and the control is not good, the system shafting will be in a torsional state for a long time, which may cause fatigue damage to the parts, affect the work of the local system, or even cause equipment failure or damage, and even cause a disastrous accident.

[0003] Early torsional vibration devices are mostly mechanical, and the parts are in contact with each other, which has the disadvantages of small frequency range, small power, and easy wear of parts. Magnetic coupling transmission relies on magnetic field force for transmission, which is a non-contact mechanical transmission device, and has the advantages of vibration isolation, overload protection, and not easy to wear compared with traditional mechanical type. However, the current contact type measurement method and non-contact type measurement method are not suitable for torsional vibration detection of magnetic coupling type transmission device: it is difficult to install the contact type sensor in the magnetic coupling environment, and it may interfere with the magnetic field distribution and affect the transmission capacity of the magnetic coupling transmission device; the non-contact measurement may be affected by the strong magnetic field, resulting in inaccurate detection results.

[0004] Therefore, a special experimental device is needed to test its performance, and it is necessary to develop a magnetic coupling shafting torsional vibration experimental device to solve the above problems. SUMMARY

[0005] Therefore, it is necessary to provide a novel magnetic coupling shafting torsional vibration experimental device to solve the problems in the background art.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: A kind of magnetic coupling shafting torsional vibration experimental device, including experimental base and long shaft located above experimental base, first with limiting sleeve support and second with limiting sleeve support are fixedly connected on the experimental base, and the top of first with limiting sleeve support and second with limiting sleeve support is movably connected with long shaft by bearing, bearing damper is also installed between the experimental base and long shaft, first disc and second disc are fixedly connected with long shaft outside and located on both sides of bearing damper respectively, first displacement sensor and second displacement sensor are installed on the experimental base, one end of long shaft is connected with transmission shaft by second coupling, and the other end of long shaft is connected with angle encoder by first coupling; Magnetic coupling energy generator is installed on the transmission shaft, and magnetic coupling energy generator includes first magnet, second magnet, magnet base and driving rod, the driving rod is installed on the end of transmission shaft away from long shaft, second magnet is arranged at the both ends of driving rod respectively, the number of magnet base is set to two, and two magnet bases are located directly below two second magnets respectively, first magnet is fixedly connected on the top of two magnet bases, and two second magnets are asymmetrically arranged relative to the central axis of transmission shaft.

[0007] Preferably, the bearing damper includes a damper and a bearing sleeve connected to the top of the damper, wherein the bearing sleeve is movably connected to the long shaft by a bearing, and the bottom of the damper is fixedly connected to the experimental base.

[0008] Preferably, the long shaft and the experimental base are arranged in parallel, and a gap is reserved between the long shaft and the experimental base.

[0009] Preferably, the first displacement sensor and the second displacement sensor are located in the gap, and the first displacement sensor is located below the first disc, and the second displacement sensor is located below the second disc.

[0010] Preferably, a support frame is installed on the experimental base, and the angle encoder is fixedly connected to the experimental base through the support frame.

[0011] Preferably, the long shaft and the transmission shaft are both cylindrical, and the long shaft and the transmission shaft have the same diameter.

[0012] Preferably, the first disc and the second disc are coaxially arranged, and the center points of the first disc and the second disc are located on the central axis of the long shaft.

[0013] Preferably, a clamping groove is formed at the end of the transmission shaft, the driving rod is plate-shaped, and the driving rod is horizontally embedded in the inner side of the clamping groove and fixedly combined by a pin shaft.

[0014] Preferably, the driving rod is perpendicular to the transmission shaft.

[0015] Preferably, the two first magnets and the two second magnets are distributed one by one, and the distance between the two groups of first magnets and the two groups of second magnets is equal in the initial state.

[0016] The beneficial effects of the above-mentioned solutions of the present application are as follows: Through the working of the magnetic coupling energy generator, the driving rod drives the transmission shaft to twist under the magnetic coupling effect, further drives the long shaft, and cooperates with the monitoring assembly including the first displacement sensor, the second displacement sensor and the angle encoder to measure and record the bending-torsional motion trajectory and the rotation angle data in real time, obtains the motion characteristics under different conditions, adjusts the magnetic coupling energy generator to make the long shaft bend and twist, changes the properties of the magnetic coupling energy generator to obtain different bending-torsional motion parameters. According to the recorded bending-torsional vibration data under different conditions, analysis and comparison are carried out, so that the torsional vibration detection of the shaft system is realized, and the accuracy requirement of the torsional vibration detection of the shaft system is met. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the magnetic coupling shaft system torsional vibration experimental device in an embodiment of the present application.

[0019] Figure 2 It is a schematic diagram of the overall structure of the magnetic coupling shaft system torsional vibration experimental device in an embodiment of the present application.

[0020] Figure 3 It is a schematic diagram of the overall structure of the magnetic coupling shaft system torsional vibration experimental device in an embodiment of the present application.

[0021] Figure 4 It is a schematic diagram of the overall structure of the magnetic coupling shaft system torsional vibration experimental device in an embodiment of the present application.

[0022] In the drawings: Angle encoder-1; First coupling-2; First belt limiting sleeve support-3; First disc-4; First displacement sensor-5; Long shaft-6; Bearing damper-7; Second displacement sensor-8; Second disc-9; Second belt limiting sleeve support-10; Second coupling-11; Transmission shaft-12; Experimental base-13; First magnet-14; Second magnet-15; Magnet base-16; Driving rod-17; Supporting frame-18; Damper-71; Bearing sleeve-72; Clamping groove-121; Pin shaft-122. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0026] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0027] like Figures 1-4 As shown, this embodiment provides a magnetically coupled shaft system torsional vibration experimental device, including an experimental base 13 and a long shaft 6 located above the experimental base 13. The experimental base 13 is fixedly connected to a first bracket 3 with a limiting sleeve and a second bracket 10 with a limiting sleeve. The top ends of the first bracket 3 with a limiting sleeve and the second bracket 10 with a limiting sleeve are movably connected to the long shaft 6 through bearings. Specifically, the first bracket 3 with a limiting sleeve and the second bracket 10 with a limiting sleeve include a bracket and a limiting sleeve. The bracket is fixed on the experimental base 13, and the limiting sleeve is movably sleeved on the outside of the long shaft 6 through a bearing. A bearing damper 7 is installed between the experimental base 13 and the long shaft 6. A first disk 4 and a second disk 9 are fixedly connected to the outside of the long shaft 6 and on both sides of the bearing damper 7. A first displacement sensor 5 and a second displacement sensor 8 are installed on the experimental base 13. One end of the long shaft 6 is connected to a drive shaft 12 through a second coupling 11, and the other end of the long shaft 6 is connected to an angle encoder 1 through a first coupling 2. The first displacement sensor 5 and the second displacement sensor 8 sense the movement trajectory of the first disk 4 and the second disk 9, respectively, and thus determine the bending-torsional motion trajectory of the long shaft 6. The angle encoder 1 senses the torsional angle data of the long shaft 6, thereby obtaining the motion characteristics of the long shaft 6 during the experiment.

[0028] The transmission shaft 12 is provided with a magnetic coupling energy generator, which comprises a first magnet 14, a second magnet 15, a magnet base 16 and a driving rod 17.

[0029] The first magnet 14 is an electromagnet, and the second magnet 15 is a permanent magnet. The electromagnet is connected to a corresponding control circuit, and a control switch is arranged to control the on-off of the control circuit. When the control circuit is connected, the current direction can be further controlled, so as to change the magnetic pole of the first magnet 14. At the same time, one of the first magnets 14 and the corresponding permanent magnet are attracted to each other, and the other first magnet 14 and the corresponding permanent magnet are repelled from each other, so as to drive the long shaft 6 to produce a torsional motion.

[0030] The circuit and the control involved in the present application are prior art, and will not be described in detail here.

[0031] Specifically, in the embodiment given in the present application, the connection between the driving rod 17 and the transmission shaft 12 is located at one third of the driving rod 17. In this way, the two second magnets 15 are placed asymmetrically with respect to the center axis, so as to excite the long shaft 6 to produce a bending-torsional motion and provide torsional vibration energy.

[0032] Further, in the above technical solution, the bearing damper 7 comprises a damper 71 and a bearing sleeve 72 connected to the top end of the damper 71, wherein the bearing sleeve 72 is movably connected to the long shaft 6 through a bearing, and the bottom end of the damper 71 is fixedly connected to the experimental base 13.

[0033] Further, in the above technical solution, the long shaft 6 and the experimental base 13 are arranged in parallel, and a gap is reserved between the long shaft 6 and the experimental base 13.

[0034] Further, in the above technical solution, the first displacement sensor 5 and the second displacement sensor 8 are located in the gap, and the first displacement sensor 5 is located below the first disc 4, and the second displacement sensor 8 is located below the second disc 9. In the specific installation, the first displacement sensor 5 can be located directly below or obliquely below the first disc 4; similarly, the second displacement sensor 8 can be located directly below or obliquely below the second disc 9.

[0035] Further, in the above technical solution, the experimental base 13 is provided with a supporting frame 18, and the angle encoder 1 is fixedly connected to the experimental base 13 through the supporting frame 18. In order to transmit the torsional force of the long shaft 6 to the working end of the angle encoder 1, the working end of the angle encoder 1 is inserted through the supporting frame 18, and a bearing is arranged in the through hole.

[0036] Further, in the above technical solution, the long shaft 6 and the transmission shaft 12 are both provided in a cylindrical shape, and the long shaft 6 and the transmission shaft 12 have the same diameter. Specifically, the long shaft 6 and the transmission shaft 12 are installed, and the angle encoder 1 is installed at the end of the long shaft 6 and the transmission shaft 12, and the angle encoder 1 is coaxial with the axis of the long shaft 6 and the transmission shaft 12. Thus, the accuracy of the torsion angle measurement can be ensured, and the reliability of the experimental data can be ensured.

[0037] Further, in the above technical solution, the first disc 4 and the second disc 9 are coaxially distributed, and the center points of the first disc 4 and the second disc 9 are located on the central axis of the long shaft 6. Specifically, the first disc 4 and the second disc 9 are both made of lightweight plastic material, and the first disc 4 and the second disc 9 are provided with markers on the outer side, so that the first displacement sensor 5 and the second displacement sensor 8 can capture the markers and effectively record the displacement of the first disc 4 and the second disc 9.

[0038] Further, in the above technical solution, the transmission shaft 12 is provided with a clamping groove 121 at the end, the driving rod 17 is provided in a plate shape, the driving rod 17 is embedded into the inner side of the clamping groove 121 in a horizontal shape, and the driving rod 17 is fixedly combined through the pin shaft 122. Specifically, the thickness of the driving rod 17 matches the thickness of the clamping groove 121, the length of the clamping groove 121 matches the width of the driving rod 17, after the driving rod 17 is embedded into the clamping groove 121, the outer side surface of the driving rod 17 is flush with the outer side end surface of the transmission shaft 12, one end of the pin shaft 122 is also flush with the outer side end surface of the transmission shaft 12, and the other end of the pin shaft 122 penetrates the driving rod 17 and extends into the transmission shaft 12.

[0039] Further, in the above technical solution, the driving rod 17 is vertically arranged with the transmission shaft 12. Such an arrangement is conducive to transmitting the driving force generated by the magnetic coupling energy to the driving rod 17, and further enabling the transmission shaft 12 to drive the long shaft 6 to twist.

[0040] Further, in the above technical solution, the two first magnets 14 and the two second magnets 15 are correspondingly arranged, and the distance between the two groups of first magnets 14 and the two groups of second magnets 15 is equal in the initial state.

[0041] The device is used, the monitoring assembly is installed on the assembled long shaft 6, transmission shaft 12 and experimental base 13, specifically including first displacement sensor 5, second displacement sensor 8 and angle encoder 1, and first disc 4 and second disc 9 are set as reference objects on long shaft 6, and the magnetic coupling energy generator is driven through the magnetic coupling energy generator set on one side of transmission shaft 12, specifically, two groups of first magnet 14 and two groups of second magnet 15 cooperate, one group of first magnet 14 and second magnet 15 attract each other, and the other group of first magnet 14 and second magnet 15 repel each other; conversely, one group of first magnet 14 and second magnet 15 repel each other, and the other group of first magnet 14 and second magnet 15 attract each other. The magnetic force required by the magnet on the left side should be greater than that of the magnet on the right side, so as to achieve the purpose of the torsion of transmission shaft 15, realize the magnetic coupling effect, make driving rod 17 drive transmission shaft 12 to twist, further drive long shaft 6, and through first displacement sensor 5, second displacement sensor 8 and angle encoder 1, the bending-torsion motion trajectory and rotation angle data of long shaft 6 are measured and recorded in real time, the motion characteristics of long shaft 6 are analyzed, the bending-torsion motion of long shaft is adjusted by adjusting the magnetic coupling energy generator, the properties of the magnetic coupling energy generator are changed, and different bending-torsion motion parameters are obtained. According to the bending-torsion vibration data recorded under different conditions, analysis and comparison are carried out, so as to realize the torsional vibration detection of the shaft system and ensure the accuracy of the detection result.

[0042] Importantly, it should be noted that the constructions and arrangements of the present application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of discrete elements or positions can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be changed, or reordered, according to alternative embodiments. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functions and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating

[0043] Furthermore, in the interest of providing a concise description of illustrative embodiments, not all features of an actual implementation can be described (that is, not all

[0044] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0045] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of claims of the present application.

Claims

1. A magnetically coupled shaft system torsional vibration experimental apparatus, comprising an experimental base (13) and a long shaft (6) located above the experimental base (13), characterized in that: The experimental base (13) is fixedly connected to a first bracket with a limiting sleeve (3) and a second bracket with a limiting sleeve (10), and the top ends of the first bracket with a limiting sleeve (3) and the second bracket with a limiting sleeve (10) are movably connected to the long shaft (6) through bearings. A bearing damper (7) is also installed between the experimental base (13) and the long shaft (6). A first disc (4) and a second disc (9) are fixedly connected to the outside of the long shaft (6) and on both sides of the bearing damper (7). A first displacement sensor (5) and a second displacement sensor (8) are installed on the experimental base (13). One end of the long shaft (6) is connected to a drive shaft (12) through a second coupling (11), and the other end of the long shaft (6) is connected to an angle encoder (1) through a first coupling (2). A magnetic coupling energy generator is installed on the drive shaft (12). The magnetic coupling energy generator includes a first magnet (14), a second magnet (15), a magnet base (16), and a drive rod (17). The drive rod (17) is installed at one end of the drive shaft (12) away from the long axis (6). The two ends of the drive rod (17) are respectively provided with second magnets (15). The number of magnet bases (16) is set to two, and the two magnet bases (16) are respectively located directly below the two second magnets (15). The top of the two magnet bases (16) is fixedly connected to the first magnet (14). The two second magnets (15) are asymmetrically arranged relative to the central axis of the drive shaft (12).

2. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 1, characterized in that: The bearing damper (7) includes a damper (71) and a bearing sleeve (72) connected to the top of the damper (71), wherein the bearing sleeve (72) is movably connected to the long shaft (6) through a bearing, and the bottom of the damper (71) is fixedly connected to the experimental base (13).

3. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 1, characterized in that: The long axis (6) is parallel to the experimental base (13), and a gap is reserved between the long axis (6) and the experimental base (13).

4. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 3, characterized in that: The first displacement sensor (5) and the second displacement sensor (8) are both located within the gap, with the first displacement sensor (5) located below the first disk (4) and the second displacement sensor (8) located below the second disk (9).

5. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 1, characterized in that: The experimental base (13) is equipped with a support frame (18), and the angle encoder (1) is fixedly connected to the experimental base (13) through the support frame (18).

6. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 1, characterized in that: Both the long shaft (6) and the transmission shaft (12) are cylindrical, and the long shaft (6) and the transmission shaft (12) have the same diameter.

7. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 6, characterized in that: The first disk (4) and the second disk (9) are coaxially distributed, and the center points of the first disk (4) and the second disk (9) are both located on the central axis of the major axis (6).

8. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 6, characterized in that: The drive shaft (12) has a slot (121) at its end. The drive rod (17) is plate-shaped and is horizontally embedded in the slot (121) and fixed by a pin (122).

9. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 8, characterized in that: The drive rod (17) is perpendicular to the transmission shaft (12).

10. The experimental apparatus for torsional vibration of a magnetically coupled shaft system according to claim 8, characterized in that: Two first magnets (14) and two second magnets (15) are distributed in a one-to-one correspondence, and in the initial state, the distance between the two sets of first magnets (14) and the two sets of second magnets (15) is equal.

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