Vibration exciter with liquid counterweight and vibration suppression structure

Abstract

The invention discloses a vibration exciter with a liquid counterweight and vibration suppression structure, and belongs to the field of magnetic vibration equipment, the vibration exciter comprises an electromagnet, a groove body mounting plate and an elastic assembly, the elastic assembly is provided with at least two hollow counterweight boxes, and the hollow counterweight boxes are provided with counterweight adjusting assemblies and vibration suppression assemblies; the balance weight adjusting assembly comprises a pump body, a pipeline, a control valve and a liquid level sensor, a liquid connector is formed in the hollow balance weight box, the pipeline is communicated with the liquid connector, the pump body and the control valve are both installed on the pipeline, the liquid level sensor is installed on the hollow balance weight box, and the control valve is communicated with the liquid level sensor. And the control valve and the pump body are in communication connection with the liquid level sensor. According to the vibration exciter with the liquid balance weight and the vibration suppression structure, through the liquid balance weight design in the hollow balance weight box, the inherent limitation of integral multiple adjustment of a traditional solid balance weight is broken through, and continuous stepless adjustment of the balance weight mass is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic vibration equipment, and in particular to an exciter with a liquid counterweight and a vibration suppression structure. Background Art

[0002] Currently, traditional vibrators generally use solid counterweights as vibration mass adjustment components. This approach has exposed significant technical bottlenecks in industrial applications:

[0003] 1. The technical nature of limited adjustment precision: Solid counterweights are designed with discrete masses (e.g., 5kg / unit, 10kg / unit), and their adjustment mode can only achieve step-by-step mass changes by "adding or removing a single counterweight." This "integer multiple adjustment" feature is fundamentally flawed in precision vibration control scenarios. For example, in the semiconductor wafer polishing process, the vibration amplitude must be controlled within ±0.1mm. However, traditional counterweights change the mass by at least 5kg per adjustment, causing vibration parameter fluctuations to exceed 300% of the process requirements, making them unable to meet the requirements of nanometer-level precision control.

[0004] 2. Engineering pain point of high operation and maintenance costs: The replacement of solid counterweights requires multiple processes such as "shutdown and power off → remove fixing bolts → move the counterweights → recalibrate". Taking chemical screening equipment that is adjusted three times a day as an example, a single adjustment takes about 30-60 minutes. In addition to directly causing loss of production capacity, manual handling of counterweights weighing more than 10kg can easily cause operator fatigue and high labor costs. More importantly, frequent disassembly and assembly will cause metal fatigue at the installation interface - wear of the bolt holes leads to a decrease in fitting accuracy, causing the amplitude deviation of the equipment to increase exponentially with time of use, and the accuracy decay cycle is shortened by 40% compared to the initial state, which in turn forces companies to increase the frequency of calibration or replace equipment prematurely, forming a vicious cycle of "high maintenance costs-low operating efficiency". In the scenario of automated production lines, this model is completely contrary to the demand for "unmanned operation and maintenance", becoming a technical bottleneck for the upgrade of intelligent manufacturing.

[0005] 3. The technical paradox of liquid counterweights: Some existing technologies attempt to use liquids (such as water and silicone oil) as counterweights, achieving mass control by varying the liquid level. However, this fails to address the core issue of liquid dynamics: when the vibrator's operating frequency is coupled with the liquid's sloshing frequency, the liquid's sloshing amplitude can reach 25%-40% of the liquid level. This results in: 1) distortion of the vibrator's output waveform, such as a high sine wave distortion rate; 2) significant reduction in fatigue life due to periodic impact loads on the sidewalls of the housing; and 3) an increased risk of liquid spillage, particularly at inclination angles exceeding 15°.

[0006] Therefore, there is an urgent need for an exciter with a liquid counterweight and a vibration suppression structure. Summary of the Invention

[0007] The purpose of the present invention is to provide an exciter with a liquid counterweight and a vibration suppression structure in order to solve the problems existing in the prior art.

[0008] To achieve the above object, the technical solution adopted by the present invention is: an exciter with a liquid counterweight and a vibration suppression structure, comprising an electromagnet, a tank mounting plate and an elastic component,

[0009] The electromagnet is provided with a third connecting plate connected to the trough mounting plate, and the elastic component is provided with a through hole for the third connecting plate to pass through;

[0010] The elastic component is provided with at least two hollow counterweight boxes, the counterweight boxes are symmetrically arranged about the central axis of the tank mounting plate, and the hollow counterweight boxes are provided with a counterweight adjustment component and a vibration suppression component;

[0011] The counterweight adjustment assembly includes a pump body, a pipeline, a control valve and a liquid level sensor. The hollow counterweight box is provided with a liquid interface, the pipeline is connected to the liquid interface, the pump body and the control valve are both installed on the pipeline, the liquid level sensor is installed on the hollow counterweight box, and the control valve, the pump body and the liquid level sensor are communicatively connected;

[0012] The vibration suppression assembly includes multiple layers of staggered inclined partitions installed on the inner wall of the hollow counterweight box and a damping net covering the partitions.

[0013] Preferably, the vibration suppression assembly further includes a buffer airbag and an air pressure balancing valve. The buffer airbag is arranged at the top of the inner wall of the hollow counterweight box, and the air pressure balancing valve is installed on the hollow counterweight box and is connected to the buffer airbag.

[0014] Preferably, it also includes a shell, and the electromagnet, elastic component and hollow counterweight box are accommodated in the shell.

[0015] Preferably, the damping mesh is coated with a super-hydrophobic coating.

[0016] Preferably, the density of the partition and the damping net is consistent with the density of the liquid weight.

[0017] Preferably, the hollow counterweight box and the elastic component are connected via a buffer pad.

[0018] Preferably, the height difference between adjacent partitions of the multi-layer partitions is 1 / 5-1 / 3 of the height of the hollow counterweight box, and they are staggered and inclined at 15°-30°.

[0019] Preferably, the elastic component includes a first connecting plate, a plurality of leaf springs and a second connecting plate sequentially arranged along the direction from the electromagnet toward the trough body mounting plate, and each leaf spring is separated by a gasket.

[0020] Preferably, a liquid level tank is provided on the side wall of the hollow counterweight box, and the liquid level sensor is installed on the top of the liquid level tank.

[0021] Preferably, the electromagnet is an EI-type electromagnet, a U-type electromagnet or a permanent magnet.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. This vibrator with liquid counterweight and vibration suppression structure, through the liquid counterweight design in the hollow counterweight box, breaks through the inherent limitations of traditional solid counterweight blocks that can be adjusted in integer multiples, and realizes continuous and stepless adjustment of the counterweight mass. Compared with traditional solid counterweight blocks, liquid counterweights can achieve continuous adjustment of any mass value within the full range according to actual working conditions.

[0024] 2. This vibrator, featuring a liquid counterweight and vibration suppression structure, eliminates the need to remove the counterweight, reducing the cost of manual handling. It also completely eliminates the wear and tear on the mounting interface caused by frequent removal of the counterweight, significantly extending the equipment's accuracy degradation cycle. This fully automated adjustment mode is not only suitable for industrial scenarios with 24-hour continuous production, but also highly compatible with the unmanned operation and maintenance requirements of intelligent manufacturing production lines. It fundamentally resolves the technical contradiction of traditional vibrators: high adjustment costs and low operating efficiency.

[0025] 3. This vibrator with a liquid counterweight and vibration suppression structure has multiple layers of staggered baffles arranged obliquely and staggered in a hollow counterweight box, forming a tortuous liquid flow channel. When the liquid sloshes, it needs to flow along the channel in a circuitous manner, consuming the sloshing energy by changing the flow direction; the damping mesh covers the surface of the baffle, and its mesh structure generates frictional resistance when in contact with the liquid, converting the kinetic energy of the liquid sloshing into heat energy, thereby reducing the sloshing amplitude; when the liquid sloshes and impacts the top of the box, the cushioning airbag absorbs the impact energy through compression deformation, reducing the impact of sloshing on the device; at the same time, the volume distribution supplement mechanism further reduces the liquid level calculation deviation caused by uneven volume distribution of components, thereby improving the counterweight adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the appearance structure of the present invention.

[0028] Figure 3 This is a front view of the structure of the present invention with the outer shell removed.

[0029] Figure 4 It is a schematic side sectional structural diagram of the hollow counterweight box of the present invention.

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the hollow counterweight box of the present invention.

[0031] Figure 6 This is a schematic diagram of the installation structure of the counterweight adjustment assembly of the present invention.

[0032] Figure 7 It is a schematic diagram of the position structure of the liquid level tank and the liquid level sensor of the present invention.

[0033] In the figure: 1. Electromagnet; 2. Tank mounting plate; 3. Elastic component; 301. First connecting plate; 302. Leaf spring; 303. Second connecting plate; 304. Gasket; 4. Third connecting plate; 5. Buffer pad; 6. Outer shell; 7. Hollow counterweight box; 8. Counterweight adjustment component; 801. Pump body; 802. Pipeline; 803. Stop valve; 804. Regulating valve; 805. Liquid level tank; 806. Liquid level sensor; 9. Vibration suppression component; 901. Partition; 902. Damping net; 903. Buffer airbag; 904. Pressure strip; 905. Air pressure balance valve; 906. Screw. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Please refer to Figures 1 to 7 In this embodiment, an exciter with a liquid counterweight and vibration suppression structure includes an electromagnet 1, a trough mounting plate 2 and an elastic component 3.

[0036] The electromagnet 1 is provided with a third connecting plate 4 connected to the slot mounting plate 2 , and the elastic component 3 is provided with a through hole for the third connecting plate 4 to pass through.

[0037] At least two hollow counterweight boxes 7 are provided on the elastic component 3 , and the counterweight boxes are symmetrically arranged about the central axis of the tank mounting plate 2 . The hollow counterweight boxes 7 are provided with a counterweight adjustment component 8 and a vibration suppression component 9 .

[0038] Please refer to Figure 1 、 Figure 4 and Figure 5The counterweight adjustment component 8 includes a pump body 801, a pipeline 802, a control valve and a liquid level sensor 806. A liquid interface is opened on the hollow counterweight box 7, and the pipeline 802 is connected to the liquid interface. The pump body 801 and the control valve are both installed on the pipeline 802. The liquid level sensor 806 is installed on the hollow counterweight box 7. The control valve, the pump body 801 and the liquid level sensor 806 are communicatively connected.

[0039] In the above technical solution, the liquid counterweight design in the hollow counterweight box 7 breaks through the inherent limitation of the "integer multiple adjustment" of the traditional solid counterweight block, and realizes the continuous stepless adjustment of the counterweight mass. Specifically, the design uses the fluidity and measurable characteristics of the liquid to accurately control the amount of liquid in the hollow counterweight box 7 through the adjustment system composed of the pump body 801, the pipeline 802, the control valve and the liquid level sensor 806; after the liquid level sensor 806 measures the liquid level, the control system needs to be corrected in combination with the volume distribution characteristics of each component in the hollow counterweight box: the volume of the partition 901, the damping net 902, the pressure strip 904 and the screw 906 in different height ranges is measured in advance through three-dimensional modeling, and fitted into a piecewise function; according to the current liquid level, the function is called to calculate the volume of the components covered by the liquid, and the final actual volume of the liquid = liquid level × box bottom area - covered component volume, thereby reducing the calculation deviation caused by uneven volume distribution.

[0040] At the same time, this solution does not require the removal of the counterweight, thereby reducing the operating costs of manually handling the counterweight, and completely eliminates the problem of installation interface wear caused by frequent removal and removal of the counterweight, significantly extending the equipment's accuracy attenuation cycle. This fully automated adjustment mode is not only suitable for industrial scenarios with 24-hour continuous production, but also highly consistent with the unmanned operation and maintenance needs of intelligent manufacturing production lines, fundamentally resolving the technical contradiction of "high adjustment cost and low operating efficiency" of traditional vibrators. In addition, this solution can save time in counterweight adjustment. Taking the chemical material screening scenario as an example, traditional manual adjustment takes 30 minutes to complete a counterweight change, while this solution can be completed within two minutes.

[0041] The "24-hour continuous production" in this solution refers to unplanned shutdown of the production line, such as overhaul and production change, which is allowed to include necessary process adjustment actions, such as counterweight adjustment. Counterweight adjustment and subsequent liquid level measurement are routine adjustment links of the production line. The 2-minute time it takes has been incorporated into the production rhythm design and will not cause production interruption. When the pump body for adding / discharging liquid stops working, the partition 901 and damping net 902 in the counterweight box 7 will quickly attenuate the liquid shaking. At this time, the ultrasonic liquid level sensor starts measuring to ensure that the accurate height is obtained when the liquid surface is static. This measurement process is a necessary part of the counterweight adjustment, and together with the liquid delivery time, it constitutes the total time required to complete the adjustment within two minutes without interrupting 24-hour continuous production.

[0042] The liquid interface, combined with pipe 802, supports bidirectional adjustment of the liquid counterweight, allowing for the addition or removal of liquid. In the event of a sudden change in the vibrator's load, such as switching from no load to full load, pump 801 can rapidly adjust the liquid volume, allowing vibration parameters to reach a new stable state within 10 seconds. This avoids the loss of material screening efficiency associated with traditional solutions due to delayed counterweight adjustment.

[0043] It should be noted that the hollow counterweight box 7 includes a box body and a cover plate welded to the box body. When the device is manufactured and processed, the counterweight assembly and the vibration suppression assembly 9 are first installed on the hollow counterweight box 7, and finally the hollow counterweight box 7 is welded and sealed. The box body and cover plate of the hollow counterweight box 7 adopt a full welding sealing process, and the weld height is ≥3mm, thereby ensuring the sealing effect of the hollow counterweight box 7.

[0044] Please refer to Figure 4 and Figure 6 The vibration suppression assembly 9 includes a multi-layer staggered inclined partition 901 installed on the inner wall of the hollow counterweight box 7 and a damping net 902 covering the partition 901.

[0045] In the above scheme, the multi-layer staggered partitions 901 are arranged obliquely and staggered in the hollow counterweight box 7 to form a tortuous liquid flow channel. When the liquid sloshes, it needs to flow along the channel in a circuitous manner, and the sloshing energy is consumed by changing the flow direction; the damping net 902 covers the surface of the partition 901, and its mesh structure generates friction resistance when it comes into contact with the liquid, converting the kinetic energy of the liquid sloshing into heat energy, thereby reducing the sloshing amplitude.

[0046] Partitions 901 are directly bonded to the inner wall of the hollow counterweight box 7. Damping mesh 902 is secured to the surface of partitions 901 using pressure strips 904 and screws 906, with screws 906 used every 20 mm. Adjacent partitions 901 form non-enclosed flow gaps, allowing liquid to flow naturally through the gaps between the top of partitions 901 and the upper wall of the box, or between the bottom of partitions 901 and the lower wall of the box. For example, a 20 mm gap is maintained between the top of the upper partition 901 and the upper wall of the box, while a 30 mm gap is maintained between the bottom of the lower partition 901 and the lower wall of the box, forming an "S-shaped non-enclosed channel" that ensures liquid can flow along the open path between partitions 901.

[0047] The vibration suppression component 9 also includes a buffer airbag 903 and an air pressure balancing valve 905. The buffer airbag 903 is arranged at the top of the inner wall of the hollow counterweight box 7. The air pressure balancing valve 905 is installed on the hollow counterweight box 7 and is connected to the buffer airbag 903. The initial inflation pressure of the buffer airbag 903 is 0.1MPa-0.2MPa.

[0048] In the above scheme, when the liquid sloshes and impacts the top of the box, the buffer airbag 903 absorbs the impact energy through compression deformation, reducing the impact of the sloshing on the device. The air pressure balance valve 905 balances the air pressure inside and outside the hollow counterweight box 7 in real time to prevent the buffer airbag 903 from being over-pressurized and ruptured or deformed and failing due to temperature changes (such as the box heating up due to long-term operation of the equipment) or air pressure fluctuations during liquid adjustment. Within the temperature range of -20℃ to 60℃, the buffering performance fluctuation of the buffer airbag 903 is ≤5%, ensuring stable operation of the equipment in extreme environments.

[0049] The initial inflation pressure of 0.1-0.2 MPa places the cushioning airbag 903 in its optimal elastic operating range. During the vibrator's high-frequency reciprocating motion, the cushioning airbag 903 rapidly compresses and expands, absorbing over 30% of the impact energy. Compared to a structure without the cushioning airbag 903, the impact load on the box sidewall is reduced by 40%.

[0050] It should be noted that when the liquid level height is ≤40% of the box height and the vibration acceleration is <0.3 times the acceleration of gravity, the cushioning effect of the cushioning airbag 903 can be ignored; when the liquid level height is >40% or the acceleration is ≥0.3 times the acceleration of gravity, the cushioning airbag 903 can effectively cushion the top impact force.

[0051] It also includes a shell 6, in which the electromagnet 1, the elastic component 3 and the hollow counterweight box 7 are accommodated. A central hole is opened on the top of the shell 6 for the third connecting plate 4 to pass through, and the slot mounting plate 2 is arranged on the top of the shell 6.

[0052] Damping mesh 902 is coated with a super-hydrophobic coating. In the aforementioned technical solution, this coating increases the contact angle between the surface of damping mesh 902 and liquid from 70° to over 150°. Liquid forms beads on the mesh surface, preventing it from adhering to the surface. This prevents pore clogging of damping mesh 902 due to dried-up liquid. Conventional uncoated damping mesh 902 experiences a 30% drop in vibration damping efficiency after 500 hours of continuous operation due to pore clogging. This solution, however, maintains over 90% of its initial vibration damping efficiency even after 3,000 hours.

[0053] The self-cleaning properties of the super-hydrophobic coating reduce the frequency of manual cleaning of the damping mesh 902. Traditional solutions require monthly disassembly and cleaning of the damping mesh 902. This solution reduces maintenance costs to once a year, reducing maintenance costs by 90%. This solution is particularly suitable for applications requiring high cleanliness, such as the chemical and food industries.

[0054] The density of the partition 901 , the damping mesh 902 , the pressure strip 904 and the screw 906 is consistent with the density of the liquid weight.

[0055] In the above scheme, since the control system needs to calculate the mass of the liquid based on the liquid level height, and the components such as the partition 901, damping mesh 902, pressure strip 904 and screw 906 in the hollow counterweight box 7 occupy a certain volume and have their own mass, directly converting the mass based on the liquid level height will cause a large error. Specifically, the following solution can be adopted: the density of each of the above components is designed to be consistent with the density of the liquid in the box. Based on Archimedes' principle, the mass of the liquid displaced by the component is equal to its own mass, thereby reducing the liquid level calculation deviation caused by the volume occupied by the components, so that the calculated mass obtained by the system through accurate conversion of the liquid level height is closer to the actual mass of the liquid counterweight.

[0056] Taking water as the weight liquid as an example, the partition 901 and the pressure strip 904 can both be made of polyethylene sheets with high-density fillers. The density of polyethylene is 0.92-0.96g / cm³. The high-density filler can be iron powder, which has a density of 7.8%. By adding iron powder to polyethylene, the density of the mixture reaches 1g / cm³. 3 The damping net 902 can be made of polyethylene as the matrix and calcium carbonate as the filler, so that the density after mixing reaches 1g / cm 3 , where the density of calcium carbonate is 2.7g / cm 3 The screw 906 can be made of a low-density plastic screw, and the density can be adjusted by a filler. For example, a lightweight filler can be added to a nylon screw to reduce the density of the nylon screw, thereby keeping the density of the screw 906 consistent with that of water.

[0057] Since the partition 901, the damping net 902, the pressure strip 904 and the screw 906 are all obtained by adding fillers to the matrix, the density of each part of each component can be guaranteed to be consistent, so that the density of the component will not change with the change of height.

[0058] The pore size of the damping mesh 902 is 0.5-2mm. In the above technical solution, the corrugated damping mesh 902 with a pore size of 0.5-2mm achieves differentiated suppression of vibrations of different frequencies through a gradient pore size design. The small pore size of 0.5mm enhances the liquid turbulence effect under high-frequency vibrations, while the large pore size of 2mm optimizes flow damping at low-frequency vibrations, such as 10-30Hz. The overall vibration reduction efficiency is 25% higher than that of a flat mesh. In operating conditions with large fluctuations in vibration frequency, it can automatically adapt to frequency changes to maintain a stable vibration reduction effect.

[0059] It should be noted that the kinetic energy of liquid sloshing is dissipated mainly through three stages: 1. Energy dissipation by the flow diversion of the baffle 901: The staggered baffles 901 force the liquid flow path to increase by more than 50%. According to the Bernoulli equation, the change in flow velocity leads to an increase in the pressure differential resistance; 2. Viscous energy dissipation by the damping mesh 902: When the liquid flows through the damping mesh 902 with a pore size of 0.5-2mm, according to the Hagen-Poiseuille law, the viscous resistance F and the flow velocity v satisfy F∝μv (μ is the viscosity of the liquid); 3. Cushioning by the cushioning airbag 903: The gas isothermal compression process absorbs impact energy, satisfying W=∫P dV.

[0060] Please refer to Figure 3 and Figure 5 , the hollow counterweight box 7 is connected to the elastic component 3 through the buffer pad 5. In the above technical solution, the hollow counterweight box 7 is elastically connected to the connecting plate through the buffer pad 5, which significantly reduces the transmission efficiency of vibration energy compared to the rigid connection. During the startup or shutdown stage of the equipment, the resonance phenomenon caused by the frequency coupling between the counterweight box and the main structure can be effectively suppressed, so that the amplitude overshoot at the start of the vibrator is reduced from 30% to within 10%. The buffer pad 5 is a 5mm thick neoprene buffer pad 5. The buffer pad 5 connects the hollow counterweight box 7 to the elastic component 3 by gluing. The surface of the buffer pad 5 is provided with a grid-like groove, which can absorb the vibration energy transmitted by the counterweight box through deformation.

[0061] The height difference between adjacent partitions 901 of the multi-layer partitions 901 is 1 / 5-1 / 3 of the height of the hollow counterweight box 7, and the partitions 901 are arranged in an inclined and staggered manner at an angle of 15°-30°.

[0062] In this technical solution, the height difference between adjacent baffles 901 is 1 / 5-1 / 3 of the box height, and they are staggered at an angle of 15°-30°, forming a "stepped damping" structure. When the liquid sloshes, it must traverse baffles 901 at different heights, increasing the flow path by over 50%. This repeated diversion consumes significant amounts of sloshing kinetic energy. Compared to parallel baffles 901, this structure significantly reduces sloshing attenuation under low-frequency vibrations, effectively suppressing the liquid's first- and second-order sloshing modes.

[0063] The staggered and tilted partitions 901 design enables the natural frequency of liquid sloshing to be distributed non-periodically, forming a frequency gap with the vibrator's operating frequency. This eliminates the resonance risk in traditional liquid counterweights where "sloshing frequency = vibration frequency" and ensures stable operation of the equipment across the entire frequency range.

[0064] Please refer to Figure 2 and Figure 3The elastic assembly 3 includes a first connecting plate 301, multiple leaf springs 302, and a second connecting plate 303, arranged in sequence along the direction from the electromagnet 1 toward the trough mounting plate 2. The leaf springs 302 are separated by washers 304. The first connecting plate 301, the multiple leaf springs 302, and the second connecting plate 303 are secured together with bolts and nuts. In this technical solution, the separation of the washers 304 creates a slight damping between the leaf springs 302, dissipating an additional 5% of the vibration energy and further stabilizing the amplitude.

[0065] It should be noted that the hollow counterweight box 7 can be selectively set on the first connecting plate 301 and / or the second connecting plate 303: when set on the first connecting plate 301, the mass of the hollow counterweight box 7, the counterweight adjustment component 8 and the vibration suppression component 9 constitutes part of the mass of the counterweight mass. Since there is a ratio relationship between the mass of the counterweight mass and the working mass, increasing the mass of the counterweight mass can correspondingly increase the upper limit of the bearing mass of the device on the working mass; when the hollow counterweight box 7 is set on the second connecting plate 303 (not shown in the figure of this embodiment), the mass of the above components is included in the mass of the working mass. When the mass of the counterweight mass is constant, the actual mass of the material in the working mass can be reduced; when the hollow counterweight box 7 is set on the first connecting plate 301 and the second connecting plate 303 at the same time (not shown in the figure of this embodiment), the staff can adjust the mass of the working mass and the counterweight mass separately as needed.

[0066] Please refer to Figure 6 and Figure 7 The side wall of the hollow counterweight box 7 is provided with a liquid level groove 805, and a liquid level sensor 806 is installed on the top of the liquid level groove 805. In the above technical solution, the liquid level sensor 806 is an ultrasonic liquid level sensor 806. Since the multiple partitions 901 are staggered, the traditional installation method of the liquid level sensor 806 will be affected by the obstruction of the partitions 901 and cannot properly measure the height of the liquid. The setting of the liquid level groove 805 can avoid the obstruction of the ultrasonic signal by the partitions 901, directly test the liquid level, and improve the accuracy of the liquid level measurement.

[0067] The control valves include a stop valve 803 and a regulating valve 804, each installed on pipe 802. In the above technical solution, the combination of stop valve 803 and regulating valve 804 forms a "coarse adjustment + fine adjustment" control mode. The stop valve 803 is used for rapid opening and closing, achieving a wide range of liquid volume adjustment; the regulating valve 804 is used for fine adjustment, which can adjust the liquid weight while ensuring a small range of liquid level fluctuation.

[0068] It should be noted that the liquid level measurement of this scheme is triggered after the stop valve 803 completes the adjustment of the liquid counterweight mass. The liquid level sensor 806 measures the liquid level height, and then the regulating valve 804 adds or subtracts the liquid counterweight according to the measured liquid level height. During this process, the liquid level sensor 806 continuously monitors the liquid level height. Since the liquid level hardly fluctuates when the regulating valve adjusts the liquid counterweight mass, the liquid level sensor 806 can accurately measure the liquid level height.

[0069] The electromagnet 1 is an EI type electromagnet, a U type electromagnet or a permanent magnet.

[0070] This solution is applicable to electromagnets 1 using EI-type electromagnets, U-shaped electromagnets, or permanent magnets. The symmetrical magnetic circuit design of the EI-type electromagnet provides stable electromagnetic force, suitable for high-frequency vibration scenarios of 30-50Hz. The open magnetic circuit of the U-shaped electromagnet facilitates air gap adjustment, suitable for low-frequency, large-amplitude scenarios of 10-30Hz. The strong magnetic field generated by the permanent magnet allows electromagnet 4 to be designed with a larger gap. Compared to traditional electromagnetic drive designs that require a small gap to maintain suction, the larger gap increases the movement range of the coil assembly, reduces the velocity gradient during attraction, and reduces the impact kinetic energy, thereby reducing the risk of mechanical collision. In addition, this solution is also applicable to other types of electromagnets 1.

[0071] Working method: When electromagnet 1 is energized, it drives the third connecting plate 4 to work, and through the third connecting plate 4, it drives the first connecting plate 301, elastic component 3, and second connecting plate 303 to vibrate back and forth. The multiple layers of parallel leaf springs 302 in elastic component 3 are separated by gaskets 304. This not only uses the elastic deformation of the leaf springs 302 to cushion vibrations, but also dissipates energy through friction with the gaskets 304, reducing resonance. When the liquid in the hollow counterweight box 7 sloshes with vibration, the multiple layers of staggered partitions 901 force the liquid to flow along an S-shaped path, consuming the sloshing kinetic energy; the corrugated damping net 902 covering the partitions 901 further converts kinetic energy into heat energy through the turbulent effect; the top cushioning airbag 903 compresses to absorb impact, and the air pressure balance valve 905 synchronously adjusts the air pressure in the box, forming a three-stage vibration reduction mechanism.

[0072] When adjusting the mass of the counterweight, the pump body 801 adjusts the liquid flow through the pipeline 802 system. The stop valve 803 first opens and closes quickly to complete the large flow coarse adjustment. After the stop valve 803 stops working, the liquid level sensor 806 measures the liquid level, and the regulating valve 804 then fine-tunes the liquid counterweight according to the measured liquid level until the target liquid level is reached. The pipeline 802 is connected to the quick-connect connector using a stainless steel bellows, and the pump body 801 is isolated from vibration by a metal hose to ensure the stability of the adjustment process. At this time, if the hollow counterweight box 7 is set on the first connecting plate 301, its mass is used as the counterweight mass to form a ratio with the working mass. Increasing the amount of liquid can increase the load capacity; if it is set on the second connecting plate 303, its mass is included in the working mass, which can reduce the material mass while keeping the counterweight mass constant to adapt to different working conditions.

[0073] Throughout operation, the vibration suppression assembly 9 and the counterweight adjustment system work in real time. During high-frequency vibration, the 0.5mm aperture damping mesh 902 enhances viscous resistance; during low-frequency vibration, the 2mm aperture and the large-angle baffle 901 dissipate sloshing energy. The leaf spring 302 and gasket 304 of the elastic assembly 3 dampen the vibration amplitude continuously, maintaining stable vibration parameters within a certain frequency range and achieving full-process adaptive control from electromagnetic drive to vibration attenuation.

[0074] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An exciter with a liquid counterweight and vibration suppression structure, comprising an electromagnet (1), a tank mounting plate (2) and an elastic component (3), characterized in that: The electromagnet (1) is provided with a third connecting plate (4) connected to the tank mounting plate (2), and the elastic component (3) is provided with a through hole for the third connecting plate (4) to pass through; At least two hollow counterweight boxes (7) are provided on the elastic component (3), the counterweight boxes are symmetrically arranged about the central axis of the tank body mounting plate (2), and the hollow counterweight boxes (7) are provided with a counterweight adjustment component (8) and a vibration suppression component (9); The counterweight adjustment assembly (8) comprises a pump body (801), a pipeline (802), a control valve and a liquid level sensor (806); a liquid interface is provided on the hollow counterweight box (7); the pipeline (802) is connected to the liquid interface; the pump body (801) and the control valve are both mounted on the pipeline (802); the liquid level sensor (806) is mounted on the hollow counterweight box (7); and the control valve, the pump body (801) and the liquid level sensor (806) are in communication connection; The vibration suppression assembly (9) comprises a plurality of layers of staggered inclined partitions (901) mounted on the inner wall of the hollow counterweight box (7) and a damping net (902) covering the partitions (901).

2. The vibrator with liquid counterweight and vibration suppression structure according to claim 1, characterized in that: The vibration suppression assembly (9) further comprises a buffer airbag (903) and an air pressure balance valve (905), wherein the buffer airbag (903) is arranged on the top of the inner wall of the hollow counterweight box (7), and the air pressure balance valve (905) is mounted on the hollow counterweight box (7) and communicates with the buffer airbag (903).

3. The vibrator with liquid counterweight and vibration suppression structure according to claim 2, characterized in that: It also includes a housing (6), wherein the electromagnet (1), the elastic component (3) and the hollow counterweight box (7) are accommodated in the housing (6).

4. The vibrator with liquid counterweight and vibration suppression structure according to claim 1, characterized in that: The damping mesh (902) is coated with a super-hydrophobic coating.

5. The vibrator with liquid counterweight and vibration suppression structure according to claim 1, characterized in that: The density of the partition (901) and the damping net (902) is consistent with the density of the liquid weight.

6. The vibrator with liquid counterweight and vibration suppression structure according to claim 1, characterized in that: The hollow counterweight box (7) is connected to the elastic component (3) via a buffer pad (5).

7. The vibrator with liquid counterweight and vibration suppression structure according to claim 1, characterized in that: The height difference between adjacent partitions (901) of the multi-layer partitions (901) is 1 / 5-1 / 3 of the height of the hollow counterweight box (7), and the partitions (901) are arranged in an inclined and staggered manner at an angle of 15°-30°.

8. The vibrator with liquid counterweight and vibration suppression structure according to claim 1, characterized in that: The elastic component (3) comprises a first connecting plate (301), a plurality of leaf springs (302), and a second connecting plate (303) sequentially arranged along a direction from the electromagnet (1) toward the trough mounting plate (2), wherein each leaf spring (302) is separated by a gasket (304).

9. The vibrator with liquid counterweight and vibration suppression structure according to claim 1, characterized in that: A liquid level groove (805) is provided on the side wall of the hollow counterweight box (7), and the liquid level sensor (806) is installed on the top of the liquid level groove (805).

10. The vibrator with liquid counterweight and vibration suppression structure according to claim 1, characterized in that: The electromagnet (1) is an EI-type electromagnet, a U-type electromagnet or a permanent magnet.

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