Main shaft simulation vibration loading test device and working method thereof

Abstract

The invention relates to the technical field of test devices, in particular to a spindle simulation vibration loading test device and a working method thereof.The spindle simulation vibration loading test device comprises an electromagnetic structure, a magnet structure and a conductive structure, and the electromagnetic structure and the magnet structure are used in cooperation; the electromagnetic structure comprises a fixed disc coaxially fixed with the main shaft and a plurality of coils mounted on the fixed disc; the variable acting force is generated between the coil and the magnet structure in an inductance mode, so that the purpose of providing vibration loading for the main shaft is achieved, extrusion force can be synchronously provided for the main shaft in the mode, the main shaft achieves the effect of simulating a real working environment, and the detection accuracy is improved; as the plurality of coils periodically pass through the conductive structure at the position deviating from the axis of the main shaft, the acting force is generated at the constant position on the electromagnetic structure in the rotating state, that is, the effect of generating the acting force at the constant position outside the main shaft in the rotating state is realized, and the simulation accuracy is improved.

Description

Technical Field

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

[0002] With the rapid development of high-end equipment manufacturing, aerospace, precision instruments and other fields, the performance reliability of core rotating components (such as machine tool spindles, aero-engine rotors, etc.) has become a key factor determining the life and safety of equipment. In actual working conditions, the spindle is subjected to complex dynamic loads for a long time, including centrifugal force caused by high-speed rotation, alternating torque, multi-directional vibration excitation, and stress fluctuations caused by temperature changes. The continuous action of these composite loads is likely to cause fatigue damage, precision deterioration or even sudden failure. Therefore, the vibration loading test of the spindle is an important measure to evaluate the performance of the spindle.

[0003] However, traditional vibration loading tests generally use direct contact methods such as hydraulic pressure to provide radial thrust to the rotating spindle, or use non-contact methods such as electromagnetic to provide radial thrust to the rotating spindle, thereby simulating the spindle operation process and completing the loading. However, this loading method is more inclined to the spindle loading test rather than the spindle vibration loading test, and its detection effect on the spindle vibration loading is poor. If a vibrating structure such as a shaker is directly installed on the spindle, it will only provide vibration to the spindle and cannot simulate the stress condition during the spindle 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 its working method, which can effectively solve the problems in the background art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A spindle simulation vibration loading test device includes an electromagnetic structure, a magnet structure and a conductive structure, and the electromagnetic structure and the magnet structure are used in cooperation with each other; The electromagnetic structure includes a fixed disk coaxially fixed with the spindle and a plurality of coils installed on the fixed disk. The plurality of coils are circumferentially distributed along the fixed disk, and the axis of the coil is parallel to the axis of the fixed disk. When the coil moves to the position of the conductive structure, the conductive structure energizes the coil, and a mutual force is generated between the coil and the magnet structure, and the force is directed towards the axis direction of the fixed disk; Wherein, when the coil is energized, due to the inductance effect, the current flowing through the coil gradually increases.

[0006] In some embodiments of the present invention, the magnet structure is located on the plane where the conductive structure and the axis of the fixed disk are located, and the position of the magnet structure is adjustable.

[0007] In some embodiments of the present invention, during the movement of the magnet structure, the force between the magnet structure and the coil is always an attractive force or a repulsive force.

[0008] In some embodiments of the present invention, the magnet structure includes a magnet, two rollers arranged on both sides in the width direction of the magnet, and an arc-shaped track cooperating with the two rollers. The rollers roll on the arc-shaped track, and the arc-shaped track is relatively fixed; Wherein, when the magnet moves to one end of its active interval, the magnet is located inside a plurality of the coils, and the magnet is coaxial with the fixed disk. When the magnet moves to the other end of its active interval, the magnet is collinear with the coils on the conductive structure.

[0009] In some embodiments of the present invention, the length of the coil connected to the circuit is adjustable.

[0010] In some embodiments of the present invention, the electromagnetic structure further includes a movable ring coaxially arranged with the fixed disk and capable of moving along the axis direction of the fixed disk. A plurality of first conductive sheets are arranged in the circumferential direction on the outer wall of the movable ring, a plurality of connectors are arranged in the circumferential direction on the inner wall of the movable ring, and the first conductive sheets are electrically connected to the corresponding connectors. A conductor in contact with the outer wall of the coil is arranged on the connector; Wherein, the conductive structure supplies power to one end of the first conductive sheet and the coil.

[0011] In some embodiments of the present invention, a core column is arranged inside the coil. One end of the core column is provided with a connection disk, the connection disk is rotatably installed on the fixed disk, the shape of the conductor is set as a chute shape, and the conductor is slidably buckled on the outer wall of one turn of the coil.

[0012] 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; An outer edge is arranged on the fixed disk, a plurality of second conductive sheets are arranged on the outer edge, and elastic pieces are arranged on each of the second conductive sheets. The elastic pieces are in sliding contact with the connection disk and are electrically connected to each other.

[0013] In some embodiments of the present invention, the conductive structure includes a substrate with a fixed position, 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 two poles of an external power supply, and the two conductive wheels are respectively in contact with and conduct electricity with the corresponding first conductive sheet and second conductive sheet.

[0014] A working method of a spindle simulation vibration loading test device includes the following steps: Connect the fixed disk in the electromagnetic structure to the end of the spindle; Move the conductive structure onto the electromagnetic structure so that the conductive structure is electrically connected to the coil at the corresponding position; Move the magnet structure to the working position so that the magnet structure can cooperate with the electromagnetic structure; Rotate the spindle so that several of the coils pass through the conductive structure accordingly; Energize the coils at the corresponding positions through the conductive structure. The coils generate magnetic forces and generate interaction forces with the magnet structure. This force is transmitted to the spindle. Due to the inductance effect, the intensity of the current in the coils gradually increases, and the interaction force between the coils and the magnet structure gradually increases. When the coil deviates from the conductive structure, the interaction force between it and the magnet structure disappears, and the next coil is re-electrically connected to the conductive structure, and the interaction force between the corresponding coil and the magnet structure gradually increases again. Thus, the force received by the spindle is a variable force, and the spindle is in a vibration loading state; Change the orientation of the magnet structure so that the direction of the interaction force between it and the electromagnetic structure changes, thereby changing the direction of the force on the spindle and realizing the variable-direction vibration loading work.

[0015] The present invention can achieve the following technical effects: By using the inductance method, a variable interaction force is generated between the coil and the magnet structure, thereby achieving the purpose of providing vibration loading for the spindle. And this method can synchronously provide extrusion force for the spindle, so as to make the spindle achieve the effect of simulating the real working environment and improve the detection accuracy; Since several coils periodically pass through the conductive structure at positions deviating from the axis of the spindle, a force is generated at a constant position on the rotating electromagnetic structure, that is, the effect of generating a force at a constant position outside the rotating spindle is achieved, improving the simulation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic diagram when the present invention is used in cooperation with the spindle; Figure 3 is an exploded structural diagram of the present invention; Figure 4 It is a schematic diagram of the explosion structure of the electromagnetic structure in the embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the magnet and the roller in the embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the coil in the embodiment of the present invention.

[0018] Reference numerals: 100, electromagnetic structure; 101, fixed disk; 102, coil; 103, movable ring; 104, first conductive sheet; 105, connecting body; 106, conductor; 107, core column; 108, connecting disk; 109, second conductive sheet; 110, elastic sheet; 111, movable cylinder; 112, support ring; 113, notch; 114, guiding edge; 200, magnet structure; 201, roller; 202, arc track; 203, outer frame; 204, oil cylinder; 205, push-pull arm; 206, magnet; 300, conductive structure; 301, substrate; 302, support frame; 303, conductive wheel; 400, main shaft. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] As Figures 1 to 4 shown, a main shaft simulation vibration loading test device of the present invention includes an electromagnetic structure 100, a magnet structure 200, and a conductive structure 300, and the electromagnetic structure 100 and the magnet structure 200 are used in cooperation with each other; The electromagnetic structure 100 includes a fixed disk 101 coaxially fixed to the main shaft 400 and a plurality of coils 102 mounted on the fixed disk 101. The plurality of coils 102 are circumferentially distributed along the fixed disk 101, and the axis of the coil 102 is parallel to the axis of the fixed disk 101. When the coil 102 moves to the position of the conductive structure 300, the conductive structure 300 energizes the coil 102, and an interaction force is generated between the coil 102 and the magnet structure 200, and the acting force is directed towards the axis direction of the fixed disk 101; Among them, when the coil 102 is energized, due to the inductance effect, the current flowing in the coil 102 gradually increases; In the present invention, the positions of the magnet structure 200 and the conductive structure 300 are relatively fixed. The electromagnetic structure 100 is installed on the main shaft 400, and the main shaft 400 can be installed on the chassis. 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, a magnetic field will be generated between it and the magnet structure 200. In this way, a force will be generated between the electromagnetic structure 100 and the magnet structure 200, and this force is transmitted to the main shaft 400, so as to realize the force loading work for the main shaft 400. In some embodiments, for convenient control, the magnet structure 200 can also generate magnetic force in an electromagnetic manner. The fixed disk 101 is mainly used to provide an installation position for a plurality of coils 102. The plurality of coils 102 are arranged along the 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 be electrically connected to the conductive structure 300 is shorter. Therefore, before the current in the energized coil 102 reaches a stable state, the coil 102 can complete the movement away from the conductive structure 300. That is, when the coil 102 moves to the position of the conductive structure 300, the current in it is always in an increasing state due to the inductance effect and cannot be in a constant state, because a constant current will cause a constant force between the coil 102 and the magnet structure 200, rather than a variable effect; During use, the electromagnetic structure 100, the magnet structure 200, and the conductive structure 300 are respectively fixed at corresponding positions. 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 one coil 102 that moves to the position of the conductive structure 300 on it. During the contact process between the coil 102 and the conductive structure 300, due to the inductance effect, the current in the coil 102 continuously increases, and the force intensity between the coil 102 and the magnet structure 200 gradually increases. When the coil 102 deviates from the conductive structure 300, the force between it and the magnet structure 200 decreases or disappears. The next coil 102 moves to the position of the conductive structure 300 again and repeats the generation of force with the magnet structure 200. Thus, each coil 102 passing through the position of the conductive structure 300 can generate a fluctuating force with the magnet structure 200. This fluctuating force is transmitted to the main shaft 400, so as to realize the vibration loading effect for the main shaft 400. And this loading method can enable the main shaft 400 to receive the force provided by the electromagnetic structure 100 and the magnet structure 200, rather than simply loading vibration. Therefore, the main shaft 400 can simulate the vibration loading under real working conditions and improve the test accuracy; It should be noted that since the position of the conductive structure 300 is fixed, the starting position of the acting force provided by the electromagnetic structure 100 is fixed. This can conveniently provide an acting force deviating from the axis of the main shaft 400 for the rotating main shaft 400, so that the acting force is closer to the actual working conditions. Moreover, by using the cooperation of the electromagnetic structure 100 and the conductive structure 300, an acting force can be generated at a constant position on the rotating electromagnetic structure 100, rather than making the acting force position follow the rotation of the electromagnetic structure 100; In some embodiments, to improve the diversity of vibration loading, the voltage value of the current conveyed by the conductive structure 300 can be adjusted, so as to adjust the current change rate in the coil 102, adjust the vibration force magnitude, or make the current conveyed by the conductive structure 300 change in a waveform, so that the current in the coil 102 increases or decreases periodically. Thus, the vibration loading work is realized by actively changing the flowing current. This method requires configuring electrical structures such as a controller, an amplifier, and a frequency converter on the conductive structure 300; By using the inductance method, a variable acting force is generated between the coil 102 and the magnet structure 200, so as to achieve the purpose of providing vibration loading for the main shaft 400. And this method can synchronously provide a squeezing force for the main shaft 400, so that the main shaft 400 realizes the effect of simulating the actual working environment and improves the detection accuracy; Since several coils 102 periodically pass through the conductive structure 300 at positions deviating from the axis of the main shaft 400, an acting force is generated at a constant position on the rotating electromagnetic structure 100, that is, the effect of generating an acting force at a constant position outside the rotating main shaft 400 is achieved, and the simulation accuracy is improved.

[0022] In the actual use environment of the main shaft 400, the force applied to the main shaft 400 may be not only along its radial direction, but also along the inclined direction relative to the axis of the main shaft 400 or the direction parallel to the axis of the main shaft 400. Therefore, the direction of the force for vibration loading of the main shaft 400 needs to be adjustable, specifically as Figure 3 shown, the magnet structure 200 is located on the plane where the conductive structure 300 and the axis of the fixed disk 101 are located, and the position of the magnet structure 200 is adjustable; Since during normal use, the force direction of the main shaft 400 generally coplanes with its axis to avoid equipment damage caused by force deviation, it is necessary to limit the position of the magnet structure 200 on the plane where the conductive structure 300 and the axis of the fixed disk 101 are located. In this way, the acting force between the electromagnetic structure 100 and the magnet structure 200 will coplane with the axis of the main shaft 400, improving the simulation authenticity. And when the magnet structure 200 moves on its plane, the direction of the acting force between it and the electromagnetic structure 100 changes. Thus, it is convenient to provide vibration loading with acting forces in different directions for the main shaft 400, improving the diversity and comprehensiveness of the test detection.

[0023] Since the force between the electromagnetic structure 100 and the magnet structure 200 is a magnetic force, when the magnet structure 200 moves, the relative direction between it and the energized coil 102 in the electromagnetic structure 100 needs to be specially set to avoid the force between the magnet structure 200 and the electromagnetic structure 100 switching back and forth between attraction and repulsion during movement, resulting in detection chaos. Specifically, during the movement of the magnet structure 200, the force between the magnet structure 200 and the coil 102 is always either attraction or repulsion. From the above description, it can be seen that when conducting a loading test on the main shaft 400, the force between the magnet structure 200 and the energized coil 102 should be constantly manifested as either attraction or repulsion. This can improve the unity of detection, facilitate subsequent comparative tests, and avoid the change in the force mode exerted on the main shaft 400 when the magnet structure 200 is at different positions, which may affect the detection results. It should be noted that both attraction and repulsion can be used as the detection force in the present invention. Since the forces acting on the main shaft 400 in its actual use environment are all perpendicular or inclined towards the axis direction of the main shaft 400, when the magnet structure 200 is located outside the electromagnetic structure 100, the force between the magnet structure 200 and the electromagnetic structure 100 should be repulsion, and when the magnet structure 200 is located inside the electromagnetic structure 100, the force between the magnet structure 200 and the electromagnetic structure 100 should be attraction. This can adjust the force mode according to the actual position of the magnet structure 200, reduce the limitation on the installation position of the magnet structure 200, and improve the convenience of device use. Since the force mode of the magnet structure 200 remains constant during position adjustment, the direction of the magnet structure 200 needs to be adjusted synchronously, that is, the magnet structure 200 needs to rotate synchronously.

[0024] Based on the above implementation, as Figure 3 and Figure 5 shown, the magnet structure 200 includes a magnet 206, two rollers 201 arranged on both sides in the width direction of the magnet 206, and an arc-shaped track 202 cooperating with the two rollers 201. The rollers 201 roll on the arc-shaped track 202, and the arc-shaped track 202 is relatively fixed. Among them, when the magnet 206 moves to one end of its active range, the magnet 206 is located inside several 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 collinear with the coil 102 on the conductive structure 300. In the present invention, the magnet 206 is mainly used to cooperate with the energized coil 102 and generate a mutual acting force. Since the acting 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 settings of the two rollers 201 and the arc track 202 are mainly used to synchronously change the direction of the magnet 206 when adjusting the position of the magnet 206, that is, when the position of the magnet structure 200 is adjusted, its magnetic force direction is synchronously adjusted to ensure that the form of the acting 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; It should be noted that during the test, to ensure the relative movement between the roller 201 and the arc track 202, the position of the arc track 202 is fixed. A guide rail or chute with the same shape as the arc track 202 is arranged on the side of the arc track 202. An outer frame 203 is arranged on the two rollers 201, and the outer frame 203 is slidably installed on the guide rail or chute on the arc track 202, thereby realizing the connection work between the roller 201 and the arc 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. The push-pull arm 205 is inclined and rotatably connected to the outer frame 203. Thus, when the oil cylinder 204 expands and contracts, it will pull the outer frame 203 to move through the push-pull arm 205, and the outer frame 203 moves along the track of the arc track 202, thereby driving the roller 201 to roll on the arc track 202.

[0025] To adjust the magnitude 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 using the method of adjusting the length of the coil 102 connected to the circuit, the specific number of working 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.

[0026] Based on the above implementation, as Figure 4 and Figure 6 shown, the electromagnetic structure 100 further includes a movable ring 103 coaxially arranged with the fixed disk 101 and capable of moving along the axis direction of the fixed disk 101. A plurality of first conductive sheets 104 are arranged in the circumferential direction on the outer wall of the movable ring 103, and a plurality of connectors 105 are arranged in the circumferential direction on the inner wall of the movable ring 103, and the first conductive sheets 104 are electrically connected to the corresponding connectors 105. A conductor 106 in contact with the outer wall of the coil 102 is arranged on the connector 105; Among them, the conductive structure 300 is to energize one end of the first conductive sheet 104 and the coil 102; In the present invention, the movable ring 103 is mainly used to support a plurality of connectors 105 and a plurality of conductors 106. A plurality of first conductive sheets 104 on the movable ring 103 can be electrically connected to the corresponding conductors 106. Thus, the purpose of electrically connecting the coil 102 to the conductive structure 300 can be achieved by using the first conductive sheets 104 and the conductors 106. At this time, the interval between one end of the coil 102 and the position of the conductor 106 on the coil 102 is the part of the coil 102 connected to the circuit, and the conductive structure 300 energizes this interval of the coil 102; when the movable ring 103 moves, it will drive the first conductive sheets 104, the connectors 105 and the conductors 106 to move synchronously. The first conductive sheets 104 move relative to the conductive structure 300 and maintain an electrically connected state, and the conductors 106 move on the coil 102 to adjust the length of the coil 102 connected to the circuit. Thus, the purpose of adjusting the number of working turns on the coil 102 is achieved; In some embodiments, to support the movable ring 103, a movable cylinder 111 is fixed on the end face of the fixed disk 101. The movable cylinder 111 is located inside a plurality of coils 102. A support ring 112 is provided on the end face of the movable cylinder 111. A plurality of notches 113 are formed on the support ring 112. A plurality of guiding edges 114 that are slidably engaged with the respective notches 113 are provided on the inner wall of the movable ring 103. Thus, the movable ring 103 can move horizontally on the fixed disk 101. A plurality of structures such as set screws or bolts for fixing the position of the movable ring 103 can also be provided on the support ring 112.

[0027] Optimized from the above implementation, as Figure 6 As shown, a core column 107 is provided inside the coil 102. One end of the core column 107 is provided with a connection disk 108. The connection disk 108 is rotatably mounted on the fixed disk 101. The shape of the conductor 106 is set as a chute shape, and the conductor 106 is slidably buckled on the outer wall of one turn of the coil 102; By using the core column 107, the support work for the coil 102 can be achieved, thereby avoiding the bending deformation of the coil 102. The core column 107 is formed by thermoplastic processing and needs to have insulating properties. The connection disk 108 is used to support the core column 107; when the movable ring 103 moves, it will push the coil 102 to rotate by using the shape characteristics of the conductor 106. Thus, the core column 107 and the connection disk 108 rotate, and the length of the coil 102 connected to the circuit changes; by using the above method, the length of the coil 102 connected to the circuit can be adjusted arbitrarily. If the coil 102 cannot rotate and 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 electrical contact with specific positions on the coil 102, that is, the coil 102 can only be connected to a specified number of whole turns and cannot achieve the purpose of connecting any length.

[0028] In some embodiments of the present invention, such as Figure 4and Figure 6 As shown, the connection plate 108 is conductive and is electrically connected to one end of the coil 102; An outer edge is provided on the fixed plate 101, and a plurality of second conductive sheets 109 are provided on the outer edge. A shrapnel 110 is provided on each of the second conductive sheets 109. The shrapnel 110 is in sliding contact with the connection plate 108 and is electrically connected to each other; Since the electromagnetic structure 100 needs to rotate synchronously with the main shaft 400, the second conductive sheets 109 can be used to slide contact with the conductive structure 300. When the second conductive sheet 109 moves to the position of the conductive structure 300, the conductive structure 300 is electrically connected to the coil 102 through the second conductive sheet 109 and the shrapnel 110, so as to facilitate the supply of current to each coil 102. And since the connection plate 108 allows rotation, the shrapnel 110 can be used to slide fit with the connection plate 108 to achieve the electrical connection work.

[0029] In some embodiments of the present invention, the conductive structure 300 includes a substrate 301 with a fixed position, 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 supply, and the two conductive wheels 303 are respectively in contact with and conduct electricity with the corresponding first conductive sheet 104 and the second conductive sheet 109; Since the conductive structure 300 needs to be electrically connected to different first conductive sheets 104 and second conductive sheets 109, a small gap needs to be left between adjacent first conductive sheets 104 and between adjacent second conductive sheets 109 to achieve the isolation work. The setting of the conductive wheels 303 can reduce the friction force when the conductive structure 300 slides in contact with the first conductive sheet 104 or the second conductive sheet 109, improve the service life of the conductive structure 300, and the line contact method between the conductive wheels 303 and the first conductive sheet 104 or the second conductive sheet 109 can prevent the phenomenon that it is simultaneously connected to adjacent two first conductive sheets 104 or adjacent two second conductive sheets 109. The substrate 301 and the support frames 302 can be used to provide support for the conductive wheels 303.

[0030] A working method of a main shaft simulation vibration loading test device includes the following steps: Connect the fixed plate 101 in the electromagnetic structure 100 to the end of the main shaft 400; Move the conductive structure 300 to the electromagnetic structure 100 so that the conductive structure 300 is electrically connected to the coil 102 at the corresponding position; Move the magnet structure 200 to the working position so that the magnet structure 200 can cooperate with the electromagnetic structure 100; Rotate the main shaft 400 so that a plurality of coils 102 pass through the conductive structure 300; The coil 102 at the corresponding position is energized through the conductive structure 300. The coil 102 generates a magnetic force and a mutual force is generated between the coil 102 and the magnet 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 magnet structure 200 gradually increases. When the coil 102 deviates from the conductive structure 300, the force between the coil 102 and the magnet structure 200 disappears. The next coil 102 is re-connected to the conductive structure 300, and the force between the corresponding coil 102 and the magnet structure 200 gradually increases again. Thus, the force applied to the main shaft 400 is a variable force, and the main shaft 400 is in a vibration loading state; Change the orientation of the magnet structure 200 so that the direction of the force between the magnet structure 200 and the electromagnetic structure 100 is changed, thereby changing the direction of the force applied to the main shaft 400 to achieve variable-direction vibration loading work; By adopting the above method, it is possible to achieve the working effects of providing vibration loading and extrusion force loading for the main shaft 400, and the vibration loading method is formed by generating a variable force between the sequentially energized coil 102 and the magnet structure 200; by adopting a plurality of coils 102 to form the electromagnetic structure 100, and only when the coil 102 moves to a specific position can it be energized, it is possible to achieve a method of providing a force for the main shaft 400 at a constant position outside the main shaft 400 when the main shaft 400 rotates, and this method is a non-contact method.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by 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 magnet structure and a conductive structure, and the electromagnetic structure is used in cooperation with the magnet structure; The electromagnetic structure includes a fixed disk coaxially fixed with the main shaft and a plurality of coils mounted on the fixed disk. The plurality of coils are circumferentially distributed along the fixed disk, and the axis of the coil is parallel to the axis of the fixed disk. When the coil moves to the position of the conductive structure, the conductive structure energizes the coil, and a mutual force is generated between the coil and the magnet structure, and the force is directed towards the axis direction of the fixed disk; Wherein, when the coil is energized, due to the inductance effect, the current flowing through the coil gradually increases.

2. The spindle simulation vibration loading test device according to claim 1, characterized in that, The magnet structure is located on the plane where the conductive structure and the axis of the fixed disk are located, and the position of the magnet structure is adjustable.

3. The spindle simulation vibration loading test device according to claim 2, characterized in that, During the movement of the magnet structure, the force between the magnet structure and the coil is always attractive or repulsive.

4. The spindle simulation vibration loading test device according to claim 3, wherein, The magnet structure includes a magnet, two rollers arranged on both sides of the magnet in the width direction, and an arc track used in cooperation with the two rollers. The rollers roll on the arc track, and the arc track is relatively fixed; Wherein, when the magnet moves to one end of its active range, the magnet is located inside a plurality of the coils, and the magnet is coaxial with the fixed disk. When the magnet moves to the other end of its active range, the magnet is collinear with the coil on the conductive structure.

5. The spindle simulation vibration loading test device according to claim 1, characterized in that, The length of the coil connected to the circuit is adjustable.

6. The spindle simulation vibration loading test device according to claim 5, characterized in that, The electromagnetic structure further includes a movable ring coaxially arranged with the fixed disk and capable of moving along the axis direction of the fixed disk. A plurality of conductive sheets one are arranged on the circumferential direction of the outer wall of the movable ring, a plurality of connectors are arranged on the circumferential direction of the inner wall of the movable ring, and the conductive sheet one is electrically connected to the corresponding connector. A conductor in contact with the outer wall of the coil is arranged on the connector; Wherein, the conductive structure energizes one end of the conductive sheet one and the coil.

7. The spindle simulation vibration loading test device according to claim 6, characterized in that, A core column is arranged inside the coil. One end of the core column is provided with a connection disk, the connection disk is rotatably mounted on the fixed disk, the shape of the conductor is set as a chute shape, and the conductor is slidably buckled on the outer wall of the coil in a circle.

8. The spindle simulation vibration loading test device according to claim 7, wherein The connection disk is conductive, and the connection disk is electrically connected to one end of the coil; An outer edge is arranged on the fixed disk, a plurality of conductive sheets two are arranged on the outer edge, and elastic sheets are arranged on each of the conductive sheets two. The elastic sheets are in sliding contact with the connection disk and are electrically connected to each other.

9. The spindle simulation vibration loading test device according to claim 8, characterized in that, The conductive structure includes a substrate with a fixed position, two support frames mounted on the substrate, and conductive wheels rotatably mounted 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 and conduct electricity with the corresponding conductive sheet one and conductive sheet two.

10. A working method of a spindle simulation vibration loading test device, which uses a spindle simulation vibration loading test device as described in any one of claims 1-9, characterized in that, It includes the following steps: Connect the fixed disk in the electromagnetic structure to the end of the main shaft; Move the conductive structure to the electromagnetic structure to electrically connect the conductive structure to the coil at the corresponding position; Move the magnet structure to the working position so that the magnet structure can be used in cooperation with the electromagnetic structure; Rotate the main shaft so that a plurality of said coils pass through the conductive structure accordingly; Energize the coils at corresponding positions through the conductive structure. The coils generate magnetic forces and interact with the magnet structure. This interaction force is transmitted to the main shaft. Due to the inductance effect, the intensity of the current in the coils gradually increases, and the interaction force between the coils and the magnet structure gradually increases. When the coil deviates from the conductive structure, the interaction force between it and the magnet structure disappears, and the next coil is re-electrically connected to the conductive structure. The interaction force between the corresponding coil and the magnet structure gradually increases again. Thus, the force received by the main shaft is a variable force, and the main shaft is in a vibration loading state; Change the orientation of the magnet structure so that the direction of the interaction force between it and the electromagnetic structure is changed, thereby changing the direction of the force on the main shaft and realizing the variable-direction vibration loading operation.

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