A composite multi-degree-of-freedom vibration system

Abstract

This invention provides a composite multi-degree-of-freedom vibration system, including a hydraulic vibrator, an electric vibrator, and a second worktable. The electric vibrator is connected to and drives the workpiece on the second worktable to reciprocate in a direction perpendicular to the horizontal plane. The hydraulic vibrator can also be connected to and drive the workpiece to reciprocate in a direction perpendicular to the horizontal plane. The hydraulic vibrator can also be rotated to a horizontal position and detachably connected to the second worktable, driving the workpiece on the second worktable to reciprocate in the horizontal plane. This invention can provide the workpiece with vibrations perpendicular to the horizontal direction with different amplitudes and frequencies; the hydraulic vibrator can provide the workpiece with vibrations perpendicular to and parallel to the horizontal direction; the hydraulic and electric vibrators can be connected to provide a composite vibration coupled in two vertical directions; the control system considers the feedback signal factor, enabling more accurate provision of vibration amplitude and frequency.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration devices, and in particular relates to a composite multi-degree-of-freedom vibration system. Background Art

[0002] In real life and industry, the vibrations that occur during transportation, hanging and flying, and use of many products can often be decomposed into multiple dimensions. For example, the working conditions of vehicle-mounted equipment and military equipment during road transportation are complex. Affected by the flatness of the road surface and the driving conditions of the vehicle, they will be subjected to vibration loads in both the vertical and horizontal directions. During the hanging and flying process, aircraft such as drones will be subjected to both vertical vibrations caused by loads or equipment and horizontal vibrations caused by wind. For example, when landing, carrier-based aircraft are subjected to both high-frequency impact vibrations in the vertical direction and arresting vibrations caused by large displacements of ropes in the horizontal direction. Therefore, when conducting research experiments, a vibration device is required to provide the workpiece with vibrations that meet the requirements in the direction perpendicular to the horizontal direction and / or in the horizontal plane, so as to study the working conditions of the workpiece under different vibration conditions. Many existing vibration devices still have some disadvantages, such as the narrow vibration frequency range provided, which leads to a single experimental range for the device. In addition, the vibration accuracy is not high enough. Summary of the invention

[0003] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a composite multi-degree-of-freedom vibration system, in which the hydraulic vibrator and the electric vibrator can independently provide the workpiece with vibrations of different amplitudes and frequencies perpendicular to the horizontal direction; the hydraulic vibrator can provide the workpiece with vibrations perpendicular to the horizontal direction and parallel to the horizontal direction; the hydraulic vibrator and the electric vibrator can be connected to provide the workpiece with composite vibrations coupled perpendicular to the horizontal direction and parallel to the horizontal direction; the control system of the hydraulic vibrator takes into account the feedback signal factor and can provide the vibration amplitude and frequency more accurately.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A composite multi-degree-of-freedom vibration system includes a hydraulic vibrator, an electric vibrator and a second work surface. The electric vibrator is connected to and drives the second work surface and the workpiece on the second work surface to vibrate back and forth in a direction perpendicular to the horizontal plane. The hydraulic vibrator can be connected to and drive the workpiece to vibrate back and forth in a direction perpendicular to the horizontal plane. The hydraulic vibrator can also be rotated to be located in the horizontal plane and then be detachably connected to the second work surface, and drive the second work surface and the workpiece on the second work surface to vibrate back and forth in the horizontal plane.

[0006] As a further improvement of the above technical solution:

[0007] The vibration system also includes a control system for controlling the pressure and flow of hydraulic oil output by the hydraulic vibrator. The control system includes an adder, a servo valve, and a displacement sensor. The servo valve is connected to the hydraulic vibrator and controls and adjusts the pressure and flow of hydraulic oil input to the hydraulic vibrator by an external oil supply system according to the instructions of the adder. The displacement signal of the workpiece driven by the hydraulic vibrator is detected by the displacement sensor and sent to the adder. The adder also receives manually input command signals.

[0008] The control system further comprises a valve displacement sensor. The displacement signal detected by the valve displacement sensor is a feedback signal of the servo valve, and the detected signal is sent to the adder.

[0009] The electric vibrator is connected to the second work surface through a first connecting member, and the first connecting member includes at least one horizontal slider and at least one horizontal slide rail. The horizontal slide rail is connected to the top of the electric vibrator, and the horizontal slider is connected to the bottom of the second work surface. The horizontal slider can be inserted into the horizontal slide rail. After the horizontal slider is inserted into the horizontal slide rail, the horizontal slider can move along the length direction of the horizontal slide rail and the horizontal slider cannot move in a direction perpendicular to the length direction of the horizontal slide rail. When the hydraulic vibrator is connected to the second work surface, the length direction of the horizontal slide rail is parallel to the length direction of the piston rod.

[0010] The hydraulic vibrator is connected to the second work surface through a second connecting member, and the second connecting member includes at least one vertical slide rail and at least one vertical slider. The vertical slider is connected to the side of the second work surface, and the vertical slide rail is connected to the hydraulic vibrator. When the vertical slider is inserted into the vertical slide rail, the vertical slider can move along the length direction of the vertical slide rail but cannot move in a direction perpendicular to the length direction of the vertical slide rail.

[0011] The vibration system also includes a flexible connection piece, and the hydraulic vibration exciter is also connected to the second work surface via the flexible connection piece. The hydraulic vibration exciter, the flexible connection piece, the second connection piece and the second work surface are connected in sequence.

[0012] The vibration system also includes a first work surface for carrying the workpiece. The hydraulic vibrator includes a cylinder body and a piston rod. One end of the piston rod is slidably arranged in the cylinder body and the other end is connected to the first work surface. The piston rod is driven by hydraulic pressure to move linearly back and forth.

[0013] The electric vibrator includes a main body and an excitation coil assembly, a moving coil assembly, a moving body, and a load supporting assembly arranged on the main body. The excitation coil assembly is wound on the main body, and the moving body is located in a magnetic field generated when the excitation coil assembly is energized. The moving coil assembly is wound on the moving body. When the excitation coil assembly is energized, a magnetic field is generated. When the moving coil assembly is energized, the moving coil assembly moves in the magnetic field under the action of the Ampere force and drives the moving body to move synchronously. The lower end of the moving body is connected to the upper end of the elastic load supporting assembly, the upper end of the moving body is connected to the second work surface, and the lower end of the load supporting assembly is connected to the main body.

[0014] The vibration system also includes a hydraulic vibrator steering mechanism, which includes a drive motor and a transmission assembly. The transmission assembly includes a worm wheel, a worm wheel shaft, and a worm. The worm wheel and the worm are rotatably arranged, the worm wheel and the worm are meshed, the worm wheel shaft is installed on the center line of the worm wheel, the worm wheel shaft and the worm wheel rotate together, the worm wheel shaft is fixedly connected to the hydraulic vibrator, and the drive motor is connected to and drives the worm to rotate.

[0015] The steering mechanism of the hydraulic vibrator also includes a positioning component, which includes a vertical travel switch and a vertical positioning piece. The hydraulic vibrator is provided with at least one positioning protrusion. The vertical travel switch is a travel switch for vertically positioning the hydraulic vibrator. The vertical travel switch and the vertical positioning piece are arranged at intervals. When the hydraulic vibrator rotates to be perpendicular to the horizontal plane, the hydraulic vibrator will hit the vertical positioning piece, and one of the positioning protrusions on the hydraulic vibrator will hit the vertical travel switch, so that the drive motor is controlled to stop rotating, and the vertical positioning piece will prevent the hydraulic vibrator from continuing to rotate.

[0016] The beneficial effects of the present invention are:

[0017] 1) The hydraulic vibrator and the electric vibrator can independently provide the workpiece with vibrations in different amplitude ranges and frequencies perpendicular to the horizontal direction, providing a wider range of test conditions for the workpiece and also increasing the scope of application of the workpiece;

[0018] 2) The hydraulic vibrator can provide vibrations perpendicular to and parallel to the horizontal direction for the workpiece;

[0019] 3) The hydraulic vibrator and the electric vibrator can be connected to provide the workpiece with a composite vibration coupled in the vertical and parallel directions;

[0020] 4) The control system of the hydraulic vibrator takes the feedback signal into consideration and can provide the vibration amplitude and frequency more accurately.

[0021] 5) The system has a simple structure, is reliable in use, has a low cost, and is applicable to a wide range of working conditions. A vibration structure in the third dimension can be added to the system without changing the original structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view structural schematic diagram of an embodiment of the present invention.

[0023] Figure 2 It is a schematic diagram of the top structure of an embodiment of the present invention.

[0024] Figure 3 It is a schematic diagram of the structure of a hydraulic vibrator according to an embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of a hydraulic exciter steering mechanism according to an embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of the structure of an electric vibrator according to an embodiment of the present invention.

[0027] Figure 6 It is a schematic diagram of the control system principle of an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] A composite multi-degree-of-freedom vibration system, such as Figures 1 to 6 As shown, it includes a hydraulic vibration exciter 1, an electric vibration exciter 2, a first working surface 31, a second working surface 32, a base 4, a control system, a hydraulic vibration exciter steering mechanism, a flexible connecting member 7, a first connecting member 8 and a second connecting member 9.

[0031] The base 4 is a supporting base, and the hydraulic vibrator 1 and the electric vibrator 2 are both mounted on the base 4. The first working table 31 and the second working table 32 are used to carry the workpiece to be inspected.

[0032] Hydraulic vibrator 1 Figures 1 to 3 As shown, it includes a cylinder body 11, a piston rod 12, an end cover 13, a valve block 14 and an accumulator 15. The end cover 13 is located at one end of the cylinder body 11, one end of the piston rod 12 is slidably arranged in the cylinder body 11, and the other end is connected to the first work surface 31. The piston rod 12 is driven to move back and forth in a straight line by hydraulic pressure. The accumulator 15 is connected to the cylinder body 11 through the valve block 14. As an energy storage device, the accumulator 15 can play a role in stabilizing pressure, absorbing pulsation, and stabilizing output, so that the piston rod 12 drives the first work surface 31 more smoothly.

[0033] The hydraulic exciter steering mechanism is mounted on the base 4, and the hydraulic exciter steering mechanism is connected to and drives the hydraulic exciter 1 to rotate, so that the hydraulic exciter 1 rotates until the piston rod 12 is located in the horizontal plane or the hydraulic exciter 1 rotates until the piston rod 12 is perpendicular to the horizontal plane. The hydraulic exciter steering mechanism includes a drive motor, a transmission assembly, and a positioning assembly.

[0034] The transmission assembly is a worm gear transmission assembly, specifically, the transmission assembly includes a worm wheel 61, a worm wheel shaft 62, and a worm 63. The worm wheel 61 and the worm 63 are rotatably mounted on the base 4, and the worm wheel 61 and the worm 63 are meshed. The worm wheel shaft 62 is mounted on the center line of the worm wheel 61, and the worm wheel shaft 62 and the worm wheel 61 rotate together. The worm wheel shaft 62 and the cylinder body 11 of the hydraulic vibrator 1 are fixedly connected, that is, both ends of the worm wheel shaft 62 are rotatably mounted on the base 4, and the worm wheel 61 and the hydraulic vibrator 1 are installed in the middle of the worm wheel shaft 62. The driving motor is connected to and drives the worm 63 to rotate. Based on this structure, when the worm 63 rotates, the worm 63 drives the worm wheel 61 to rotate, the worm wheel shaft 62 and the worm wheel 61 rotate synchronously, and the worm wheel shaft 62 drives the hydraulic vibrator 1 to rotate synchronously.

[0035] In order to make the hydraulic vibration exciter 1 rotate until the piston rod 12 is in a vertical position and then stop, or rotate to a horizontal position and then stop, the positioning assembly positions the rotation of the hydraulic vibration exciter 1 .

[0036] The positioning assembly includes a vertical travel switch, a vertical positioning member, a horizontal travel switch and a horizontal positioning member installed on the base 4. The driving motor, the vertical travel switch and the horizontal travel switch are all electrically connected to a controller. At least one positioning protrusion is provided on the cylinder body 11. The vertical travel switch is a travel switch for vertically positioning the hydraulic vibrator 1, and the horizontal travel switch is a travel switch for horizontally positioning the hydraulic vibrator 1. The vertical travel switch and the vertical positioning member are arranged at intervals, and their positional relationship is as follows: when the hydraulic vibrator 1 rotates to the point where the piston rod 12 is perpendicular to the horizontal plane and the first working surface 31 is located at the upper end of the piston rod 12, the cylinder body 11 will hit the vertical positioning member, and one of the positioning protrusions on the cylinder body 11 will hit the vertical travel switch, and the controller controls the driving motor to stop rotating. After the cylinder body 11 hits the vertical positioning member, the vertical positioning member will prevent the cylinder body 11 from continuing to rotate, thereby stopping the hydraulic vibrator 1. At this time, the piston rod 12 is perpendicular to the horizontal plane and the first working surface 31 is located at the upper end of the piston rod 12, thereby achieving accurate positioning of the hydraulic vibrator 1.

[0037] Similarly, when the hydraulic vibration exciter 1 rotates until the piston rod 12 is parallel to the horizontal plane, the cylinder body 11 will hit the horizontal positioning piece, and one of the positioning protrusions on the cylinder body 11 will hit the horizontal travel switch, and the control system will control the drive motor to stop rotating. After the cylinder body 11 hits the horizontal positioning piece, the horizontal positioning piece will prevent the cylinder body 11 from continuing to rotate, thus achieving accurate positioning of the hydraulic vibration exciter 1 in the horizontal direction. Figure 1 The middle dotted line indicates when the piston rod 12 of the hydraulic vibrator 1 is perpendicular to the horizontal plane.

[0038] Electric vibrator 2 Figure 5 As shown, it includes a main body 21 and an excitation coil assembly 22, a moving coil assembly 23, a moving body 24, a motion guide assembly 25, a demagnetization coil assembly 27, a load supporting assembly 28 and a ventilation hood assembly 26 arranged on the main body 21.

[0039] The excitation coil assembly 22 is wound around the body 21, and the moving body 24 is located in the magnetic field generated by the excitation coil assembly 22 after being energized. The moving coil assembly 23 is wound around the moving body 24, and when the excitation coil assembly 22 is energized, a magnetic field is generated, and the moving coil assembly 23 moves in the magnetic field under the action of the Ampere force, and drives the moving body 24 to move synchronously.

[0040] In order to make the moving body 24 move along a straight line and form reciprocating vibration, the load supporting assembly 28 is set as an elastic component. The load supporting assembly 28 is located in the main body 21. The lower end of the moving body 24 is connected to the upper end of the load supporting assembly 28, the upper end of the moving body 24 is connected to the second work table 32, and the lower end of the load supporting assembly 28 is connected to the main body 21.

[0041] The motion guide assembly 25 includes two rollers, which are located above the load support assembly 28. The rollers are rotatably arranged in the body 21, and the two rollers are respectively located on both sides of the lower end of the moving body 24, and the moving body 24 is in contact with the two rollers. The two rollers play a role in guiding the movement of the moving body 24, and the load support assembly 28 returns the moving body 24, so that the moving coil assembly 23 and the moving body 24 can achieve reciprocating motion under the action of the Ampere force and the elastic force of the load support assembly 28.

[0042] The demagnetizing coil assembly 27 demagnetizes the electric vibrator 2 to prevent the electric vibrator 2 from being magnetized after use and affecting itself and other products. The ventilation cover assembly 26 is located below the body 21 and covers the bottom of the body 21.

[0043] The flexible connector 7 is used to connect the first work surface 31 and the second work surface 32. Specifically, when the hydraulic vibrator 1 rotates until the piston rod 12 is in a horizontal plane, the first work surface 31 and the second work surface 32 can be connected through the flexible connector 7. Specifically, the side surface of the second work surface 32 is connected to the first work surface 31. In this embodiment, the flexible connector 7 is a leaf spring. The provision of the flexible connector 7 improves the flexibility of the connection between the hydraulic vibrator 1 and the second work surface 32.

[0044] The first connecting member 8 is used to connect the second work surface 32 and the electric vibrator 2. Because the hydraulic vibrator 1 can drive the second work surface 32 to move in the horizontal direction, in order to enable the second work surface 32 to withstand the horizontal drive of the hydraulic vibrator 1 and the vibration of the electric vibrator 2 in a direction perpendicular to the horizontal direction, the first connecting member 8 is provided. The first connecting member 8 includes at least one horizontal slider 81 and at least one horizontal slide rail 82. The horizontal slide rail 82 is directly connected to the top of the moving body 24 or connected through a transition piece. The horizontal slider 81 is connected to the bottom of the second work surface 32. The horizontal slider 81 can be inserted into the horizontal slide rail 82. After the horizontal slider 81 is inserted into the horizontal slide rail 82, the horizontal slider 81 can move along the length direction of the horizontal slide rail 82 and the horizontal slider 81 cannot move in a direction perpendicular to the length direction of the horizontal slide rail 82, so that the horizontal slider 81 cannot be separated from the horizontal slide rail 82. Preferably, when the hydraulic vibrator 1 is connected to the second work surface 32, the length direction of the horizontal slide rail 82 is parallel to the length direction of the piston rod 12. When two or more horizontal slide rails 82 are provided, the horizontal slide rails 82 are arranged in parallel and at intervals.

[0045] The second connecting member 9 is used to connect the second work surface 32 and the hydraulic vibrator 1, so that the hydraulic vibrator 1 and the second work surface 32 are connected without hindering the movement of the second work surface 32 perpendicular to the horizontal plane. The second connecting member 9 includes at least one vertical slide rail and at least one vertical slider. Preferably, the vertical slider is connected to the side of the second work surface 32, and the vertical slide rail is connected to the flexible connecting member 7. When the vertical slider is inserted into the vertical slide rail, the vertical slider can move along the length direction of the vertical slide rail but cannot move in a direction perpendicular to the length direction of the vertical slide rail, so that the vertical slider does not detach from the vertical slide rail.

[0046] Control system such as Figure 6 As shown, it includes an adder, a servo valve, a valve displacement sensor, a displacement sensor, and a modem. The adder, the servo valve, and the hydraulic exciter 1 are connected in sequence.

[0047] The displacement sensor is used to detect the displacement of the piston rod 12 and send the detected information to the adder.

[0048] In this embodiment, the servo valve is a two-stage valve, including a torque motor, a primary valve and a secondary valve. The valve displacement sensor is used to detect the displacement of the secondary valve and send the detected information to the adder.

[0049] The servo valve is connected to the hydraulic vibrator 1 and controls and adjusts the pressure and flow of the hydraulic oil input to the hydraulic vibrator 1 from the external oil supply system according to the instruction of the adder.

[0050] Based on the above structure, the working principle and process of the control system controlling the hydraulic vibrator 1 are as follows: the adder inputs four types of signals: command signal, displacement signal of the piston rod 12, displacement signal of the secondary valve and jitter signal. Among the above signals, the command signal is also called the signal source, which is manually set and input. The command value and parameters are set through a computer or touch screen to realize the input of the command signal. The jitter signal is an excitation signal or a compensation signal. The maximum static friction that the device must overcome from a static state to a moving state is greater than the sliding friction of the object. Therefore, the system sets the jitter signal in advance and inputs it when the device is turned on to overcome the influence of the maximum static friction during the startup process.

[0051] The displacement signal of the piston rod 12 is detected by the displacement sensor and sent to the adder, and the displacement signal of the secondary valve is detected by the valve displacement sensor and sent to the adder. That is, the displacement signal detected by the valve displacement sensor is the feedback signal of the servo valve, and the displacement signal detected by the displacement sensor is the feedback signal of the hydraulic exciter 1. Among them, the displacement sensor, the modem and the adder are connected in sequence, that is, the information detected by the displacement sensor is processed by the modem and then input into the adder.

[0052] After the above four types of signals are input, the adder integrates the input signal from the signal source and the feedback sensor signal from the servo valve and the hydraulic vibrator 1 to generate a deviation signal and amplify it. When this signal is input to the torque motor of the servo valve, a force proportional to the magnitude of this signal is generated. This force acts on the primary slide valve and causes the slide valve to produce a displacement proportional to the force. The fluid flow proportional to the output displacement of the primary slide valve acts on both ends of the secondary slide valve, making the movement speed of the secondary slide valve proportional to the input current of the torque motor. The hydraulic source is a power source that provides a certain pressure and flow to the servo valve. The servo valve changes the direction of the high-pressure fluid flow flowing into the actuator, i.e., the hydraulic vibrator 1, according to the input signal, so that the piston rod 12 and the first working table 31 as well as the fixture and the test piece loaded on the first working table 31 reciprocate under the action of the pressure difference between the upper and lower ends of the piston rod 12. The frequency and displacement of the vibration are determined by the control system parameters.

[0053] In summary, the control system forms a displacement closed-loop control system by comparing the error between the given command signal and the feedback signal, and after appropriate PID control operations. The feedback signal is compared with the input signal to obtain the deviation signal, so that the system changes in the direction of reducing the deviation, and continuously corrects the signal transmitted to the servo valve until the deviation is equal to zero or small enough, so that the actual output of the system is consistent with the expected value until the index requirements are met, thus realizing the closed-loop control function.

[0054] As can be seen from the above, both the hydraulic vibrator 1 and the electric vibrator 2 can provide vibration perpendicular to the horizontal direction, the difference is that the amplitude and frequency provided by the two are different. In this embodiment, the hydraulic vibrator 1 can provide an amplitude of plus or minus 160 mm and a frequency of 100 Hz; the electric vibrator 2 provides an amplitude of plus or minus 26 mm and a frequency of 5000 Hz.

[0055] Based on the above structure, the working process of the vibration system is as follows: when it is necessary to apply vibration perpendicular to the horizontal direction to the workpiece, select the hydraulic vibrator 1 or the electric vibrator 2 according to the required amplitude and frequency. When the hydraulic vibrator 1 is selected, the hydraulic vibrator steering mechanism is started to drive the hydraulic vibrator 1 so that the piston rod 12 rotates to be perpendicular to the horizontal plane, and the upper end of the piston rod 12 is connected to the first work surface 31, and the workpiece to be inspected is mounted on the first work surface 31, and the control system is started to input instructions to drive the piston rod 12 to vibrate reciprocatingly through hydraulics. When the electric vibrator 2 is selected, the workpiece to be inspected is mounted on the second work surface 32, and the coil in the electric vibrator 2 is energized, and the moving body 24 drives the second work surface 32 and the workpiece on the second work surface 32 to vibrate reciprocatingly.

[0056] When it is necessary to apply vibration parallel to the horizontal direction to the workpiece, first start the hydraulic vibration exciter steering mechanism to drive the hydraulic vibration exciter 1, so that the piston rod 12 rotates to be parallel to the horizontal plane, then connect the first work surface 31 and the second work surface 32 through the flexible connector 7, place the workpiece to be inspected on the second work surface 32, and finally start the hydraulic vibration exciter 1 alone, and the electric vibration exciter 2 is not started. The hydraulic vibration exciter 1 provides vibration parallel to the horizontal direction for the workpiece.

[0057] When it is necessary to couple the vibration of the workpiece, that is, to apply vibrations perpendicular to the horizontal direction and parallel to the horizontal direction to the workpiece at the same time, first start the hydraulic vibrator steering mechanism, drive the hydraulic vibrator 1, rotate the piston rod 12 to be parallel to the horizontal plane, then connect the first work surface 31 and the second work surface 32 through the flexible connector 7, place the workpiece to be tested on the second work surface 32, and finally start the hydraulic vibrator 1 and the electric vibrator 2. The electric vibrator 2 provides vibrations perpendicular to the horizontal direction, and the hydraulic vibrator 1 provides vibrations parallel to the horizontal direction. When the hydraulic vibrator 1 drives the second work surface 32 to move in the horizontal direction, due to the setting of the first connector 8, the second work surface 32 moves along the length direction of the horizontal slide rail 82 without separating from the electric vibrator 2. When the electric vibrator 2 drives the second work surface 32 to move in the direction perpendicular to the horizontal direction, due to the setting of the second connector 9, the second work surface 32 moves along the length direction of the vertical slide rail without separating from the second work surface 32. That is, the second work surface 32 can achieve coupled vibration in the horizontal and vertical directions. It should be noted that the second work surface 32 can be locked on the horizontal slide rail 82 or the vertical slide rail by bolts, etc., so that when the second work surface 32 can only vibrate in the horizontal direction or only vibrate in the direction perpendicular to the horizontal direction, it will not deviate due to the existence of the slide rail.

[0058] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the present invention in detail and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the present invention all fall within the scope of protection of the present invention.

Claims

1. A composite multi-degree-of-freedom vibration system, characterized in that: The invention comprises a hydraulic vibration exciter (1), an electric vibration exciter (2) and a second work surface (32); the electric vibration exciter (2) is connected to and drives the second work surface (32) and the workpiece on the second work surface (32) to vibrate back and forth in a direction perpendicular to a horizontal plane; the hydraulic vibration exciter (1) can be connected to and drive the workpiece to vibrate back and forth in a direction perpendicular to a horizontal plane; the hydraulic vibration exciter (1) can also be rotated to be located on a horizontal plane and then be detachably connected to the second work surface (32), and drive the second work surface (32) and the workpiece on the second work surface (32) to vibrate back and forth in a horizontal plane; The electric vibration exciter (2) is connected to the second work surface (32) via a first connecting member (8), the first connecting member (8) comprises at least one horizontal slider (81) and at least one horizontal slide rail (82), the horizontal slide rail (82) is connected to the top of the electric vibration exciter (2), the horizontal slider (81) is connected to the bottom of the second work surface (32), the horizontal slider (81) can be inserted into the horizontal slide rail (82), after the horizontal slider (81) is inserted into the horizontal slide rail (82), the horizontal slider (81) can move along the length direction of the horizontal slide rail (82) and the horizontal slider (81) cannot move in a length direction perpendicular to the length direction of the horizontal slide rail (82), when the hydraulic vibration exciter (1) is connected to the second work surface (32), the length direction of the horizontal slide rail (82) is parallel to the length direction of the piston rod (12); The hydraulic vibrator (1) is connected to the second work surface (32) via a second connecting member (9), the second connecting member (9) comprising at least one vertical slide rail and at least one vertical slider, the vertical slider being connected to the side of the second work surface (32), the vertical slide rail being connected to the hydraulic vibrator (1), and when the vertical slider is inserted into the vertical slide rail, the vertical slider can move along the length direction of the vertical slide rail but cannot move in a direction perpendicular to the length direction of the vertical slide rail; The vibration system further comprises a flexible connecting member (7), the hydraulic vibrator (1) is further connected to the second working surface (32) via the flexible connecting member (7), and the hydraulic vibrator (1), the flexible connecting member (7), the second connecting member (9) and the second working surface (32) are connected in sequence; The vibration system also includes a hydraulic vibration exciter steering mechanism fixedly connected to the hydraulic vibration exciter (1).

2. The vibration system according to claim 1, characterized in that: The vibration system also includes a control system for controlling the pressure and flow of hydraulic oil output by the hydraulic vibrator (1), the control system including an adder, a servo valve, and a displacement sensor, the servo valve being connected to the hydraulic vibrator (1) and controlling and adjusting the pressure and flow of hydraulic oil input to the hydraulic vibrator (1) from an external oil supply system according to instructions from the adder, the displacement signal of the workpiece driven by the hydraulic vibrator (1) being detected by the displacement sensor and sent to the adder, and the adder also receiving an instruction signal input manually.

3. The vibration system according to claim 2, characterized in that: The control system further comprises a valve displacement sensor. The displacement signal detected by the valve displacement sensor is a feedback signal of the servo valve, and the detected signal is sent to the adder.

4. The vibration system according to any one of claims 1 to 3, characterized in that: The vibration system also includes a first work surface (31) for supporting a workpiece. The hydraulic vibrator (1) includes a cylinder body (11) and a piston rod (12). One end of the piston rod (12) is slidably arranged in the cylinder body (11) and the other end is connected to the first work surface (31). The piston rod (12) is driven by hydraulic pressure to move linearly back and forth.

5. The vibration system according to any one of claims 1 to 3, characterized in that: The electric vibrator (2) comprises a body (21) and an excitation coil assembly (22), a moving coil assembly (23), a moving body (24), and a load support assembly (28) arranged on the body (21). The excitation coil assembly (22) is wound on the body (21), the moving body (24) is located in a magnetic field generated when the excitation coil assembly (22) is energized, and the moving coil assembly (23) is wound on the moving body (24). When the excitation coil assembly (22) is energized, a magnetic field is generated. When the moving coil assembly (23) is energized, it moves in the magnetic field under the action of the Ampere force and drives the moving body (24) to move synchronously. The lower end of the moving body (24) is connected to the upper end of the elastic load support assembly (28), the upper end of the moving body (24) is connected to a second work surface (32), and the lower end of the load support assembly (28) is connected to the body (21).

6. The vibration system according to claim 1, characterized in that: The hydraulic vibration exciter steering mechanism comprises a driving motor and a transmission assembly, wherein the transmission assembly comprises a worm wheel (61), a worm wheel shaft (62), and a worm (63), wherein the worm wheel (61) and the worm (63) are rotatably arranged, the worm wheel (61) and the worm (63) are meshed, the worm wheel shaft (62) is mounted on the center line of the worm wheel (61), the worm wheel shaft (62) and the worm wheel (61) rotate together, the worm wheel shaft (62) and the hydraulic vibration exciter (1) are fixedly connected, and the driving motor is connected to and drives the worm (63) to rotate.

7. The vibration system according to claim 6, characterized in that: The hydraulic vibrator steering mechanism also includes a positioning component, which includes a vertical travel switch and a vertical positioning member. The hydraulic vibrator (1) is provided with at least one positioning protrusion. The vertical travel switch is a travel switch for vertically positioning the hydraulic vibrator (1). The vertical travel switch and the vertical positioning member are arranged at intervals. When the hydraulic vibrator (1) rotates to be perpendicular to the horizontal plane, the hydraulic vibrator (1) will hit the vertical positioning member, and one of the positioning protrusions on the hydraulic vibrator (1) will hit the vertical travel switch, so that the drive motor is controlled to stop rotating, and the vertical positioning member will prevent the hydraulic vibrator (1) from continuing to rotate.

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