A spindle simulation vibration loading test device and its working method

Abstract

The present invention relates to the technical field of test devices, and in particular to a spindle simulation vibration loading test device and a working method thereof, comprising an electromagnetic structure, a magnetic structure and a conductive structure, wherein the electromagnetic structure and the magnetic structure are used in conjunction with each other; the electromagnetic structure comprises a fixed disk fixed coaxially with the spindle and a plurality of coils mounted on the fixed disk; by utilizing inductance, a variable force is generated between the coil and the magnetic structure, thereby achieving the purpose of providing vibration loading for the spindle, and this method can synchronously provide an extrusion force to the spindle, thereby enabling the spindle to achieve the effect of simulating a real working environment and improving detection accuracy; since the positions of the plurality of coils on the spindle deviating from its axis periodically pass through the conductive structure, a force is generated at a constant position on the electromagnetic structure in a rotating state, namely, the effect of generating a force at a constant position outside the rotating spindle is achieved, thereby improving simulation accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of test devices, in particular to a spindle simulation vibration loading test device and a working method thereof. Background Art

[0002] With the rapid development of high-end equipment manufacturing, aerospace, precision instrumentation, and other fields, the performance and reliability of core rotating components (such as machine tool spindles and aircraft engine rotors) have become a key factor in determining the lifespan and safety of these components. In actual operating conditions, spindles are subjected to complex dynamic loads over long periods of time, including centrifugal forces caused by high-speed rotation, alternating torque, multi-directional vibration excitation, and stress fluctuations caused by temperature changes. The continuous action of these complex loads can easily lead to fatigue damage, precision degradation, and even sudden failure. Therefore, vibration loading testing of spindles is an important measure for evaluating spindle performance.

[0003] However, traditional vibration loading tests generally use direct contact methods such as hydraulics to provide radial thrust to the rotating spindle, or use non-contact methods such as electromagnetics to provide radial thrust to the rotating spindle, thereby simulating the spindle operation process and completing the loading. This loading method is more inclined to a spindle loading test rather than a spindle vibration loading test, and its detection effect on spindle vibration loading is poor. If a structure that can generate vibration, such as an oscillator, is directly installed on the spindle, it will only provide vibration to the spindle, but cannot simulate the stress conditions of the spindle during operation. Therefore, its loading method is also relatively one-sided. Summary of the Invention

[0004] The present invention provides a spindle simulation vibration loading test device and a working method thereof, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A spindle simulated vibration loading test device comprises an electromagnetic structure, a magnetic structure and a conductive structure, wherein the electromagnetic structure and the magnetic structure cooperate with each other;

[0007] The electromagnetic structure includes a fixed disk fixed coaxially with the main shaft and a plurality of coils mounted on the fixed disk. The plurality of coils are distributed along the circumference of the fixed disk, and the axes of the coils are parallel to the axis of the fixed disk. When the coils move to the position of the conductive structure, the conductive structure energizes the coils, and an interaction force is generated between the coils and the magnetic structure, and the interaction force is directed toward the axis of the fixed disk.

[0008] When the coil is energized, the current flowing in the coil gradually increases due to the inductance effect.

[0009] In some embodiments of the present invention, the magnetic structure is located on a plane where the conductive structure and the axis of the fixed disk are located, and the position of the magnetic structure is adjustable.

[0010] In some embodiments of the present invention, during the movement of the magnetic structure, the acting force between the magnetic structure and the coil is always an attractive force or a repulsive force.

[0011] In some embodiments of the present invention, the magnetic structure includes a magnet, two rollers arranged on both sides of the magnet in the width direction, and an arc track used in conjunction with the two rollers, the rollers rolling on the arc track, and the arc track is relatively fixed;

[0012] When the magnet moves to one end of its active range, the magnet is located inside the coils and is coaxial with the fixed disk. When the magnet moves to the other end of its active range, the magnet is collinear with the coils on the conductive structure.

[0013] In some embodiments of the present invention, the length of the coil connected to the circuit is adjustable.

[0014] In some embodiments of the present invention, the electromagnetic structure further comprises a movable ring coaxially arranged with the fixed disk and movable along the axis of the fixed disk, a plurality of conductive sheets 1 being arranged in a circumferential direction of an outer wall of the movable ring, a plurality of connectors being arranged in a circumferential direction of an inner wall of the movable ring, the conductive sheets 1 being electrically connected to corresponding connectors, and the connectors being provided with conductors in contact with the outer wall of the coil;

[0015] Wherein, the conductive structure is that the conductive sheet 1 is energized with one end of the coil.

[0016] In some embodiments of the present invention, a core column is provided inside the coil, a connecting disk is provided at one end of the core column, the connecting disk is rotatably mounted on the fixed disk, the shape of the conductor is set to be a slide groove, and the conductor is slidably buckled on a circle of the outer wall of the coil.

[0017] In some embodiments of the present invention, the connection disk is conductive, and the connection disk is electrically connected to one end of the coil;

[0018] An outer edge is provided on the fixed disk, and a plurality of conductive sheets 2 are provided on the outer edge. Each of the conductive sheets 2 is provided with an elastic sheet, and the elastic sheets are in sliding contact with the connecting disk and are electrically connected to each other.

[0019] In some embodiments of the present invention, the conductive structure includes a fixed substrate, two support frames installed on the substrate, and a conductive wheel rotatably installed on each of the support frames. The two conductive wheels are connected to the two poles of an external power supply, and the two conductive wheels are respectively in contact with the corresponding conductive sheet one and conductive sheet two and conduct electricity.

[0020] A working method of a spindle simulation vibration loading test device comprises the following steps:

[0021] connecting the fixed disk in the electromagnetic structure to the end of the main shaft;

[0022] Moving the conductive structure onto the electromagnetic structure so that the conductive structure is electrically connected to the coil at the corresponding position;

[0023] moving the magnetic structure to a working position so that the magnetic structure can cooperate with the electromagnetic structure;

[0024] rotating the spindle so that the plurality of coils pass through the conductive structure;

[0025] The coil at the corresponding position is energized through the conductive structure, and the coil generates magnetic force and generates an interaction force with the magnetic structure. This force is transmitted to the main shaft. Due to the inductance effect, the intensity of the current in the coil gradually increases, and the force between the coil and the magnetic structure gradually increases. When the coil deviates from the conductive structure, the force between it and the magnetic structure disappears. The next coil is electrically connected to the conductive structure again, and the force between the corresponding coil and the magnetic structure gradually increases again. As a result, the force on the main shaft becomes a variable force, and the main shaft is in a vibration loading state.

[0026] Changing the orientation of the magnet structure changes the direction of the force between it and the electromagnetic structure, thereby changing the force direction of the main shaft and realizing variable direction vibration loading.

[0027] The present invention can achieve the following technical effects:

[0028] By utilizing inductance to generate a variable force between the coil and the magnetic structure, the purpose of providing vibration loading for the main shaft is achieved, and this method can synchronously provide extrusion force for the main shaft, so that the main shaft can simulate the real working environment and improve the detection accuracy; since the positions of several coils on the main shaft deviate from its axis and periodically pass through the conductive structure, a force is generated at a constant position on the electromagnetic structure in a rotating state, that is, the effect of generating a force at a constant position outside the main shaft in a rotating state is achieved, thereby improving the simulation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a schematic diagram of the present invention when used in conjunction with a main shaft;

[0032] Figure 3 It is a schematic diagram of the explosion structure of the present invention;

[0033] Figure 4 Schematic diagram of the exploded structure of the electromagnetic structure in an embodiment of the present invention;

[0034] Figure 5 Schematic diagram of the structure of the magnet and the roller in an embodiment of the present invention;

[0035] Figure 6 Schematic diagram of the structure of the coil in an embodiment of the present invention.

[0036] Reference numerals:

[0037] 100, electromagnetic structure; 101, fixed disk; 102, coil; 103, movable ring; 104, conductive sheet 1; 105, connector; 106, conductor; 107, core column; 108, connecting disk; 109, conductive sheet 2; 110, spring; 111, movable cylinder; 112, support ring; 113, notch; 114, guide edge;

[0038] 200, magnetic structure; 201, roller; 202, curved track; 203, outer frame; 204, oil cylinder; 205, push-pull arm; 206, magnet;

[0039] 300, conductive structure; 301, substrate; 302, support frame; 303, conductive wheel;

[0040] 400. Main axis. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] like Figures 1 to 4 As shown, a spindle simulation vibration loading test device of the present invention includes an electromagnetic structure 100, a magnetic structure 200 and a conductive structure 300, wherein the electromagnetic structure 100 and the magnetic structure 200 cooperate with each other;

[0044] The electromagnetic structure 100 includes a fixed disk 101 fixed coaxially with the main shaft 400 and a plurality of coils 102 mounted on the fixed disk 101. The plurality of coils 102 are distributed circumferentially along the fixed disk 101, and the axes of the coils 102 are parallel to the axis of the fixed disk 101. When the coils 102 move to the position of the conductive structure 300, the conductive structure 300 energizes the coils 102, and an interaction force is generated between the coils 102 and the magnetic structure 200, and the force is directed toward the axis of the fixed disk 101.

[0045] When the coil 102 is energized, the current flowing in the coil 102 gradually increases due to the inductance effect;

[0046] In the present invention, the positions of the magnetic structure 200 and the conductive structure 300 are relatively fixed, the electromagnetic structure 100 is installed on the main shaft 400, the main shaft 400 can be installed on the chassis, and the rotational movement of the main shaft 400 can be provided by an external motor; due to the electromagnetic effect, when the electromagnetic structure 100 is energized, it will generate a magnetic field between it and the magnetic structure 200, so that a force will be generated between the electromagnetic structure 100 and the magnetic structure 200, and the force will be transmitted to the main shaft 400, thereby realizing the force loading work for the main shaft 400; in some embodiments, for the convenience of control, the magnetic structure 200 can also generate magnetic force in an electromagnetic way; the fixed disk 101 is mainly used to provide an installation position for a plurality of coils 102, and the plurality of coils 102 are rotated along the fixed disk. The coils 102 are arranged in a circumferential direction of the fixed disk 101, and the axis of each coil 102 is parallel to the axis of the fixed disk 101. In this way, more coils 102 can be arranged in the circumferential direction of the fixed disk 101, and the time for each coil 102 to move to the position of the conductive structure 300 and electrically connect with the conductive structure 300 is relatively short. As a result, the energized coil 102 can complete the movement away from the conductive structure 300 before the current in the coil 102 reaches a stable state. That is, when the coil 102 moves to the position of the conductive structure 300, the current in the coil 102 is always in an increasing state due to the inductance effect, and cannot be in a constant state. Because a constant current will cause the force between the coil 102 and the magnetic structure 200 to be constant, rather than a variable effect;

[0047] When in use, the electromagnetic structure 100, the magnetic structure 200 and the conductive structure 300 are fixed in corresponding positions respectively, and the main shaft 400 is rotated to drive the electromagnetic structure 100 to rotate synchronously. The conductive structure 300 contacts the electromagnetic structure 100 and energizes a coil 102 on it that moves to the position of the conductive structure 300. During the contact between the coil 102 and the conductive structure 300, due to the inductance effect, the current in the coil 102 continues to increase, and the strength of the force between the coil 102 and the magnetic structure 200 gradually increases. When the coil 102 deviates from the conductive structure 300, the force between it and the magnetic structure 200 increases. The force decreases or disappears, and the next coil 102 moves to the position of the conductive structure 300 again and repeats the force generated between the coil 102 and the magnetic structure 200. As a result, each coil 102 passing the position of the conductive structure 300 can generate a fluctuating force with the magnetic structure 200. The fluctuating force is transmitted to the main shaft 400, thereby achieving a vibration loading effect for the main shaft 400. In addition, this loading method can make the main shaft 400 be subjected to the force provided by the electromagnetic structure 100 and the magnetic structure 200, rather than simply loading vibration. As a result, the main shaft 400 can simulate the vibration loading under real working conditions, thereby improving the test accuracy.

[0048] It should be noted that, since the position of the conductive structure 300 is fixed, the starting point of the force provided by the electromagnetic structure 100 is fixed. This facilitates providing a force to the rotating spindle 400 that deviates from the axis of the spindle 400, thereby making the force closer to the actual working conditions. Furthermore, by using the electromagnetic structure 100 and the conductive structure 300 in combination, the force can be generated at a constant position on the rotating electromagnetic structure 100, rather than having the force position rotate with the electromagnetic structure 100.

[0049] In some embodiments, to increase the diversity of vibration loading, the voltage value of the current delivered by the conductive structure 300 can be adjusted to adjust the rate of change of the current in the coil 102 and adjust the magnitude of the vibration force. Alternatively, the current delivered by the conductive structure 300 can be changed in a waveform to periodically increase or decrease the current in the coil 102. In this way, vibration loading is achieved by actively changing the circulating current. This method requires the configuration of electrical components such as a controller, amplifier, and inverter on the conductive structure 300.

[0050] By utilizing inductance to generate a variable force between the coil 102 and the magnetic structure 200, the purpose of providing vibration loading for the main shaft 400 is achieved, and this method can synchronously provide an extrusion force for the main shaft 400, so that the main shaft 400 can simulate the real working environment and improve the detection accuracy; since the positions of several coils 102 on the main shaft 400 deviate from their axis and periodically pass through the conductive structure 300, a force is generated at a constant position on the electromagnetic structure 100 in a rotating state, that is, the effect of generating a force at a constant position outside the main shaft 400 in a rotating state is achieved, thereby improving the simulation accuracy.

[0051] In the actual use environment of the spindle 400, the force on the spindle 400 may be in the radial direction as well as in the direction of inclination relative to the axis of the spindle 400 or in the direction parallel to the axis of the spindle 400. Therefore, the direction of the force applied to the spindle 400 by vibration needs to be adjustable, as shown in the following example. Figure 3 As shown, the magnetic structure 200 is located on the plane where the axis of the conductive structure 300 and the fixed disk 101 are located, and the position of the magnetic structure 200 can be adjusted;

[0052] Since the force direction of the main shaft 400 is generally coplanar with its axis during normal use, in order to avoid damage to the equipment due to force deviation, the position of the magnetic structure 200 needs to be limited to the surface where the conductive structure 300 and the axis of the fixed disk 101 are located. In this way, the force between the electromagnetic structure 100 and the magnetic structure 200 will be coplanar with the axis of the main shaft 400, thereby improving the simulation authenticity. When the magnetic structure 200 moves on its surface, the direction of the force between it and the electromagnetic structure 100 changes, thereby facilitating the provision of vibration loading of forces in different directions to the main shaft 400, thereby improving the diversity and comprehensiveness of test detection.

[0053] Since the force between the electromagnetic structure 100 and the magnetic structure 200 is magnetic, the relative direction of the magnetic structure 200 and the conductive coil 102 in the electromagnetic structure 100 needs to be specially set when the magnetic structure 200 moves to avoid the force between the magnetic structure 200 and the electromagnetic structure 100 switching back and forth between attraction and repulsion when the magnetic structure 200 moves, which causes detection confusion. Specifically, during the movement of the magnetic structure 200, the force between the magnetic structure 200 and the coil 102 is always attraction or repulsion.

[0054] As can be seen from the above description, when performing a loading test on the spindle 400, the force between the magnetic structure 200 and the energized coil 102 must be constant, manifesting as either an attractive force or a repulsive force. This improves the uniformity of the test, facilitates subsequent comparative tests, and avoids changes in the force acting on the spindle 400 when the magnetic structure 200 is in different positions, thereby preventing the test results from being affected.

[0055] It should be pointed out that both attractive force and repulsive force can be used as the detection force of the present invention. Since the forces acting on the main shaft 400 in the actual use environment are vertical or inclined toward the axis direction of the main shaft 400, when the magnetic structure 200 is located on the outside of the electromagnetic structure 100, there should be repulsive force between the magnetic structure 200 and the electromagnetic structure 100. When the magnetic structure 200 is located on the inside of the electromagnetic structure 100, there should be attractive force between the magnetic structure 200 and the electromagnetic structure 100. In this way, the force mode can be adjusted according to the actual position of the magnetic structure 200, the limitation on the installation position of the magnetic structure 200 is reduced, and the convenience of using the device is improved; since the force mode of the magnetic structure 200 is constant when the position is adjusted, the direction of the magnetic structure 200 needs to be adjusted synchronously, that is, the magnetic structure 200 needs to rotate synchronously.

[0056] Based on the above implementation, Figure 3 and Figure 5As shown, the magnetic structure 200 includes a magnet 206, two rollers 201 arranged on both sides of the magnet 206 in the width direction, and an arc track 202 used in conjunction with the two rollers 201. The rollers 201 roll on the arc track 202, and the arc track 202 is relatively fixed.

[0057] When the magnet 206 moves to one end of its active range, the magnet 206 is located inside the coils 102 and is coaxial with the fixed disk 101. When the magnet 206 moves to the other end of its active range, the magnet 206 is colinear with the coils 102 on the conductive structure 300.

[0058] In the present invention, the magnet 206 is mainly used to cooperate with the coil 102 in the energized state and generate an interaction force. Since the force is in the form of magnetic force, the direction of the magnet 206 needs to correspond to the direction of the magnetic force generated by the corresponding coil 102. The two rollers 201 and the arc track 202 are mainly used to adjust the position of the magnet 206 so that the direction of the magnet 206 changes synchronously. That is, when the position of the magnet structure 200 is adjusted, the direction of its magnetic force is adjusted synchronously to ensure that the force between the magnet structure 200 and the electromagnetic structure 100 remains constant. Specifically, the roller 201 can drive the magnet 206 to roll on the arc track 202.

[0059] The outer frame 203 is slidably mounted on the guide rail or slide groove on the curved track 202, thereby realizing the connection between the roller 201 and the curved track 202, and the movement of the roller 201 and the magnet 206 can be provided by the oil cylinder 204. Specifically, the fixed end position of the oil cylinder 204 is relatively fixed, and the movable end of the oil cylinder 204 is rotatably provided with a push-pull arm 205, which is tilted and rotatably connected to the outer frame 203. Therefore, when the oil cylinder 204 is extended or retracted, it will pull the outer frame 203 to move through the push-pull arm 205, and the outer frame 203 moves along the trajectory of the curved track 202, thereby driving the roller 201 to roll on the curved track 202.

[0060] In order to adjust the size of the magnetic force between the coil 102 and the magnet 206 to achieve the adjustment of the vibration intensity loaded on the main shaft 400, the purpose of changing the number of turns of the coil 102 can be adopted. Specifically, the length of the coil 102 connected to the circuit can be adjusted. By adjusting the length of the coil 102 connected to the circuit, the specific working number of turns of the coil 102 can be changed, thereby achieving the working effect of changing the vibration loading amplitude without changing the power supply current and voltage.

[0061] Based on the above implementation, Figure 4 and Figure 6 The electromagnetic structure 100 further includes a movable ring 103 coaxially disposed with the fixed disk 101 and movable along the axis of the fixed disk 101. A plurality of conductive sheets 104 are circumferentially disposed on the outer wall of the movable ring 103. A plurality of connectors 105 are circumferentially disposed on the inner wall of the movable ring 103. The conductive sheets 104 are electrically connected to corresponding connectors 105. The connectors 105 are provided with conductors 106 that contact the outer wall of the coil 102.

[0062] The conductive structure 300 is a conductive sheet 104 and one end of the coil 102 are electrically connected;

[0063] In the present invention, the movable ring 103 is mainly used to provide support for several connectors 105 and several conductors 106. Several conductive sheets 104 on the movable ring 103 can be electrically connected to corresponding conductors 106. Thus, the conductive sheet 104 and the conductor 106 can be used to achieve the purpose of electrically connecting the coil 102 and the conductive structure 300. At this time, the area between one end of the coil 102 and the position of the conductor 106 on the coil 102 is the part where the coil 102 is connected to the circuit, and the conductive structure 300 energizes this area of ​​the coil 102; when the movable ring 103 moves, it will drive the conductive sheet 104, the connector 105 and the conductor 106 to move synchronously. The conductive sheet 104 moves relative to the conductive structure 300 and maintains an electrically connected state. The conductor 106 moves on the coil 102 and adjusts the length of the coil 102 connected to the circuit, thereby achieving the purpose of adjusting the number of working turns on the coil 102;

[0064] In some embodiments, in order to support the movable ring 103, a movable cylinder 111 is fixed on the end face of the fixed disk 101, and the movable cylinder 111 is located on the inner side of the plurality of coils 102. A support ring 112 is provided on the end face of the movable cylinder 111, and a plurality of notches 113 are provided on the support ring 112. A plurality of guide ridges 114 that slide with the notches 113 are provided on the inner wall of the movable ring 103, thereby enabling the movable ring 103 to move laterally on the fixed disk 101. A plurality of structures such as top screws or bolts for fixing the position of the movable ring 103 may also be provided on the support ring 112.

[0065] Optimized on the above implementation, such as Figure 6 As shown, a core column 107 is provided inside the coil 102, and a connecting plate 108 is provided at one end of the core column 107. The connecting plate 108 is rotatably mounted on the fixed plate 101. The shape of the conductor 106 is set to be a slide groove, and the conductor 106 is slidably buckled on a circle of the outer wall of the coil 102;

[0066] The core column 107 can be used to support the coil 102, thereby preventing the coil 102 from bending and deforming. The core column 107 is made of thermoplastic and needs to have insulating properties. The connecting disk 108 is used to support the core column 107; when the movable ring 103 moves, it will use the shape characteristics of the conductor 106 to push the coil 102 to rotate, thereby causing the core column 107 and the connecting disk 108 to rotate, and the length of the coil 102 connected to the circuit changes; using the above method, the length of the coil 102 connected to the circuit can be adjusted at will. If the coil 102 cannot rotate, the conductor 106 is in a planar state and can slide on the coil 102, then when the conductor 106 moves, the conductor 106 only makes conductive contact with a specific position on the coil 102, that is, the coil 102 can only be connected to a specified number of full turns, and cannot achieve the purpose of connecting to any length.

[0067] In some embodiments of the present invention, Figure 4 and Figure 6 As shown, the connection pad 108 is conductive, and the connection pad 108 is electrically connected to one end of the coil 102;

[0068] The fixed plate 101 is provided with an outer edge, on which a plurality of conductive plates 109 are provided. Each conductive plate 109 is provided with a spring 110. The spring 110 is in sliding contact with the connecting plate 108 and is electrically connected to each other.

[0069] Since the electromagnetic structure 100 needs to rotate synchronously with the main shaft 400, the conductive plates 109 can be brought into sliding contact with the conductive structure 300. When the conductive plates 109 move to the position of the conductive structure 300, the conductive structure 300 is electrically connected to the coil 102 through the conductive plates 109 and the springs 110, thereby facilitating the transmission of current to each coil 102. Furthermore, since the connecting disk 108 is allowed to rotate, the electrical connection can be achieved by slidingly cooperating with the springs 110 and the connecting disk 108.

[0070] In some embodiments of the present invention, the conductive structure 300 includes a fixed substrate 301, two support frames 302 mounted on the substrate 301, and conductive wheels 303 rotatably mounted on each support frame 302. The two conductive wheels 303 are connected to the two poles of an external power source, and the two conductive wheels 303 are in contact with the corresponding conductive sheet 1 104 and conductive sheet 2 109, respectively, to conduct electricity.

[0071] Since the conductive structure 300 needs to be electrically connected to different conductive sheets 1 104 and conductive sheets 2 109, a small gap needs to be left between two adjacent conductive sheets 1 104 and two adjacent conductive sheets 2 109 to achieve isolation. The setting of the conductive wheel 303 can reduce the friction force when the conductive structure 300 is in sliding contact with the conductive sheet 1 104 or the conductive sheet 2 109, thereby improving the service life of the conductive structure 300. In addition, the line contact method between the conductive wheel 303 and the conductive sheet 1 104 or the conductive sheet 2 109 can prevent the phenomenon of it being connected to two adjacent conductive sheets 1 104 or two adjacent conductive sheets 2 109 at the same time. The substrate 301 and the support frame 302 can be used to provide support for the conductive wheel 303.

[0072] A working method of a spindle simulation vibration loading test device comprises the following steps:

[0073] Connect the fixed disk 101 in the electromagnetic structure 100 to the end of the main shaft 400;

[0074] Move the conductive structure 300 onto the electromagnetic structure 100 so that the conductive structure 300 is electrically connected to the coil 102 at the corresponding position;

[0075] Move the magnetic structure 200 to a working position so that the magnetic structure 200 can cooperate with the electromagnetic structure 100;

[0076] Rotating the main shaft 400 so that the plurality of coils 102 pass through the conductive structure 300;

[0077] The coil 102 at the corresponding position is energized through the conductive structure 300. The coil 102 generates magnetic force and generates an interaction force with the magnetic structure 200. This force is transmitted to the main shaft 400. Due to the inductance effect, the intensity of the current in the coil 102 gradually increases, and the force between the coil 102 and the magnetic structure 200 gradually increases. When the coil 102 deviates from the conductive structure 300, the force between it and the magnetic structure 200 disappears. The next coil 102 is electrically connected to the conductive structure 300 again, and the force between the corresponding coil 102 and the magnetic structure 200 gradually increases again. As a result, the force on the main shaft 400 becomes a variable force, and the main shaft 400 is in a vibration loading state.

[0078] Changing the orientation of the magnet structure 200 changes the direction of the force between it and the electromagnetic structure 100, thereby changing the force direction of the main shaft 400 and achieving variable direction vibration loading.

[0079] By adopting the above method, the working effects of providing vibration loading and extrusion force loading for the main shaft 400 can be achieved, and the vibration loading method is formed by generating a variable force between the coils 102 that are energized in sequence and the magnetic structure 200; by adopting a plurality of coils 102 to form an electromagnetic structure 100, and the coils 102 can only be energized when they move to a specific position, it can be achieved that when the main shaft 400 rotates, the constant position outside the main shaft 400 provides a force to the main shaft 400, and this method is a non-contact method.

[0080] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A spindle simulation vibration loading test device, characterized in that: It includes an electromagnetic structure, a magnetic structure and a conductive structure, wherein the electromagnetic structure and the magnetic structure are used in conjunction with each other; The electromagnetic structure includes a fixed disk fixed coaxially with the main shaft and a plurality of coils mounted on the fixed disk. The plurality of coils are distributed along the circumference of the fixed disk, and the axes of the coils are parallel to the axis of the fixed disk. When the coils move to the position of the conductive structure, the conductive structure energizes the coils, and an interaction force is generated between the coils and the magnetic structure, and the interaction force is directed toward the axis of the fixed disk. When the coil is energized, the current flowing in the coil gradually increases due to the inductance effect; The length of the coil connected to the circuit can be adjusted; The electromagnetic structure further includes a movable ring coaxially arranged with the fixed disk and movable along the axis of the fixed disk, a plurality of conductive sheets 1 being arranged in a circumferential direction of an outer wall of the movable ring, a plurality of connectors being arranged in a circumferential direction of an inner wall of the movable ring, and the conductive sheets 1 being electrically connected to corresponding connectors, and the connectors being provided with conductors in contact with the outer wall of the coil; Wherein, the conductive structure is that the conductive sheet 1 is energized with one end of the coil.

2. A spindle simulation vibration loading test device according to claim 1, characterized in that: The magnetic structure is located on a plane where the conductive structure and the axis of the fixed disk are located, and the position of the magnetic structure can be adjusted.

3. A spindle simulation vibration loading test device according to claim 2, characterized in that: During the movement of the magnetic structure, the acting force between the magnetic structure and the coil is always an attractive force or a repulsive force.

4. A spindle simulation vibration loading test device according to claim 3, characterized in that: The magnetic structure includes a magnet, two rollers arranged on both sides of the magnet in the width direction, and an arc track used in conjunction with the two rollers, the rollers rolling on the arc track, and the arc track is relatively fixed; When the magnet moves to one end of its active range, the magnet is located inside the coils and is coaxial with the fixed disk. When the magnet moves to the other end of its active range, the magnet is collinear with the coils on the conductive structure.

5. The spindle simulation vibration loading test device according to claim 1, characterized in that: A core column is provided inside the coil, and a connecting disk is provided at one end of the core column. The connecting disk is rotatably mounted on the fixed disk. The shape of the conductor is set to be a slide groove, and the conductor is slidably buckled on a circle of the outer wall of the coil.

6. A spindle simulation vibration loading test device according to claim 5, characterized in that: The connecting disk is conductive and electrically connected to one end of the coil; An outer edge is provided on the fixed disk, and a plurality of conductive sheets 2 are provided on the outer edge. Each of the conductive sheets 2 is provided with an elastic sheet, and the elastic sheets are in sliding contact with the connecting disk and are electrically connected to each other.

7. A spindle simulation vibration loading test device according to claim 6, characterized in that: The conductive structure includes a fixed substrate, two support frames installed on the substrate, and conductive wheels rotatably installed on each of the support frames. The two conductive wheels are connected to the two poles of an external power supply, and the two conductive wheels are respectively in contact with the corresponding conductive sheet 1 and conductive sheet 2 and conduct electricity.

8. A method for operating a spindle simulation vibration loading test device, using a spindle simulation vibration loading test device according to any one of claims 1 to 7, characterized in that: The steps include: connecting the fixed disk in the electromagnetic structure to the end of the main shaft; Moving the conductive structure onto the electromagnetic structure so that the conductive structure is electrically connected to the coil at the corresponding position; moving the magnetic structure to a working position so that the magnetic structure can cooperate with the electromagnetic structure; rotating the spindle so that the plurality of coils pass through the conductive structure; The coil at the corresponding position is energized through the conductive structure, and the coil generates magnetic force and generates an interaction force with the magnetic structure. This force is transmitted to the main shaft. Due to the inductance effect, the intensity of the current in the coil gradually increases, and the force between the coil and the magnetic structure gradually increases. When the coil deviates from the conductive structure, the force between it and the magnetic structure disappears. The next coil is electrically connected to the conductive structure again, and the force between the corresponding coil and the magnetic structure gradually increases again. As a result, the force on the main shaft becomes a variable force, and the main shaft is in a vibration loading state. Changing the orientation of the magnet structure changes the direction of the force between it and the electromagnetic structure, thereby changing the force direction of the main shaft and realizing variable direction vibration loading.

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