Composite vibration reduction ventilator

Abstract

The invention discloses a composite damping ventilator, which belongs to the technical field of ventilation equipment, and comprises a fan assembly and a first platform, and the fan assembly is arranged on the first platform; the second platform is arranged on the side, away from the fan assembly, of the first platform; the elastic layer is arranged between the first platform and the second platform, one end of the elastic layer is connected with the first platform, and the other end of the elastic layer is connected with the second platform; the damping layer is arranged on the side, away from the first platform, of the second platform. Vibration reduction of the ventilator can be achieved.

Description

Technical Field

[0001] This invention belongs to the field of ventilation equipment technology, and more specifically relates to a composite vibration damping ventilator. Background Technology

[0002] Coal mine ventilation fans are key equipment in underground operations, mainly used to ensure air circulation and dilute harmful gases. However, during operation, the high-speed rotation of the motor and impeller of existing ventilation fans generates strong vibrations. These vibrations are transmitted to the ground through the base, which can easily lead to loosening and damage of equipment parts, generate low-frequency noise, and even interfere with the normal operation of other precision equipment.

[0003] Therefore, how to develop a ventilator that can effectively reduce vibration has become a key problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a composite vibration-damping ventilator that can achieve vibration reduction effect on the ventilator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A composite vibration damping ventilator, comprising:

[0007] A wind turbine assembly and a first platform, wherein the wind turbine assembly is mounted on the first platform;

[0008] The second platform is located on the side of the first platform away from the wind turbine assembly;

[0009] An elastic layer is disposed between the first platform and the second platform, with one end of the elastic layer connected to the first platform and the other end of the elastic layer connected to the second platform;

[0010] A damping layer is disposed on the side of the second platform opposite to the first platform.

[0011] Optionally, the composite vibration damping fan further includes a buffer pad layer and an isolation plate. The first platform, the buffer pad layer, and the isolation plate are arranged sequentially from top to bottom and fixedly connected by a coupling. The side of the isolation plate facing away from the first platform is connected to the elastic layer.

[0012] Optionally, the fan assembly includes a drive motor, an impeller, and a vibration damping blade shaft, wherein the drive motor is connected to the impeller via the vibration damping blade shaft.

[0013] Optionally, the fan assembly further includes a housing, the impeller and the vibration damping blade shaft are both disposed inside the housing, and the motor is fixed to the housing.

[0014] Optionally, the fan assembly further includes a sound insulation layer, which is attached to the inner wall of the housing.

[0015] Optionally, the sound insulation layer is made of polyester fiber sound-absorbing board, and the thickness of the polyester fiber sound-absorbing board is 5-8mm.

[0016] Optionally, the composite vibration damping fan further includes support legs, and the casing is fixed to the first platform by the support legs.

[0017] Optionally, the composite vibration damping ventilator further includes concrete legs and a foundation horizontal plate, with the concrete legs disposed on the foundation horizontal plate and the damping layer disposed on the concrete legs.

[0018] Optionally, the elastic layer includes a plurality of vibration isolation springs, which are evenly distributed between the first platform and the second platform.

[0019] Optionally, a support ladder is provided between the first platform and the second platform, the support ladder is fixed to the second platform, and the upper end of the support ladder abuts against the coupling.

[0020] The above technical solution includes at least the following technical effects:

[0021] The vibrations generated by the fan assembly are first transmitted to the elastic layer through the upper first platform. This elastic layer, as the first-level vibration isolation layer, effectively isolates most of the low-frequency vibrations. Subsequently, the remaining high-frequency vibrations continue to be transmitted to the lower second platform and finally reach the damping layer. The damping layer, as the second-level vibration isolation layer, further absorbs the remaining high-frequency vibrations. Through this multi-level composite structure design, the present invention specifically solves the problem of different frequency vibrations of the ventilation fan, thereby extending the service life of the ventilation fan and significantly improving the quality of the underground working environment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a composite vibration damping ventilator according to an embodiment of the present invention;

[0024] Figure 2 : This is a front view of a composite vibration damping fan in an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Drive motor; 2. Housing; 3. Sound insulation layer; 4. Impeller; 5. Vibration damping blade shaft; 6. Coupling; 7. Buffer pad layer; 8. Isolation pressure plate; 9. Damping layer; 10. Support leg; 11. First platform; 12. Elastic layer; 13. Second platform; 14. Concrete support leg; 15. Foundation horizontal plate. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The terms "first," "second," etc., used in the specification and claims of this invention are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The composite vibration damping ventilator provided in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0030] See appendix Figure 1-2 The present invention provides a composite vibration damping ventilator, comprising:

[0031] The fan assembly and the first platform 11, with the fan assembly mounted on the first platform 11;

[0032] Optionally, the first platform 11 adopts a steel structure platform. The steel structure platform has a certain mass and rigidity, which can effectively bear the weight of the wind turbine assembly and resist the vibration load generated during the operation of the equipment, so as to ensure that the wind turbine maintains structural stability during long-term operation.

[0033] The design of the steel structure platform must fully consider the installation location and stress characteristics of the wind turbine assembly. Through reasonable layout and node connection methods, the dynamic load generated by the wind turbine during operation can be evenly transferred to the foundation structure, while reducing the impact of vibration on the platform itself and surrounding equipment.

[0034] In addition, the surface of steel structure platforms is usually treated with anti-slip material and equipped with necessary guardrails and maintenance access to ensure the safety of equipment maintenance personnel.

[0035] The second platform 13 is located on the side of the first platform 11 away from the wind turbine assembly;

[0036] Optionally, the second platform 13 is a steel structure platform, which serves as the lower support for the elastic element and evenly transfers the load to the next level of vibration reduction structure.

[0037] Elastic layer 12 is disposed between the first platform 11 and the second platform 13. One end of elastic layer 12 is connected to the first platform 11 and the other end of elastic layer 12 is connected to the second platform 13. As a first-level vibration isolation layer, elastic layer 12 absorbs and dissipates the vibration energy transmitted from the first platform 11 to the second platform 13 through the elastic deformation of its own material.

[0038] In terms of structural design, the elastic layer 12 can be designed with different geometric shapes according to actual vibration reduction requirements to adjust its stiffness characteristics, thereby achieving effective isolation of vibrations within a specific frequency range. In addition, the connection method between the elastic layer 12 and the first platform 11 and the second platform 13 must also ensure reliability. Fixing methods including vulcanized bonding, bolt fastening, or embedded installation can be selected to prevent loosening or detachment during vibration and ensure the overall stability of the vibration isolation system.

[0039] Damping layer 9 is located on the side of the second platform 13 away from the first platform 11. As a second-level vibration isolation layer, the damping layer 9 is optionally composed of multiple composite material damping blocks. The damping blocks are made of rubber, cork and metal particles, and have both elasticity and damping properties. They are used to absorb and attenuate the residual high-frequency vibrations transmitted down.

[0040] Metal particles form an irregular elastic support structure within the rubber and cork matrix. When high-frequency vibration waves are introduced, the metal particles undergo slight relative displacement and friction, converting the mechanical energy of the vibration into heat energy for dissipation. Meanwhile, the porous structure of the cork effectively absorbs the sound waves generated by the vibration, achieving dual suppression of vibration and noise.

[0041] Optionally, these damping blocks are arranged to form an integral damping layer 9, with gaps reserved between adjacent damping blocks, which can further dissipate vibration energy through the compression and flow of air in the gaps during vibration transmission.

[0042] The vibration generated by the wind turbine assembly is first transmitted to the upper first platform 11, and then isolated by the elastic layer 12. The elastic layer 12, as the first-level vibration isolation layer, effectively isolates most of the low-frequency vibration. The remaining high-frequency vibration continues to be transmitted to the lower second platform 13 and is eventually absorbed by the damping layer 9. The damping layer 9, as the second-level vibration isolation layer, further absorbs the remaining high-frequency vibration. Through this multi-level vibration reduction system of "low-frequency vibration isolation of the first vibration isolation layer + high-frequency vibration absorption of the second vibration isolation layer", the high-frequency and low-frequency vibrations generated by the wind turbine operation can be isolated and dissipated step by step.

[0043] In this embodiment, specifically, the composite vibration damping fan also includes a buffer pad 7 and an isolation plate 8. The first platform 11, the buffer pad 7 and the isolation plate 8 are arranged sequentially from top to bottom and fixedly connected by a coupling 6. The side of the isolation plate 8 facing away from the first platform 11 is connected to the elastic layer 12.

[0044] Optionally, the isolation plate 8 is made of high-strength metal material, such as steel plate or aluminum alloy plate, and the surface is galvanized or anodized, which has excellent rigidity and corrosion resistance. The isolation plate 8 can uniformly transfer the vibration load borne by the first platform 11 to the elastic layer 12, while effectively preventing the buffer pad layer 7 from lateral displacement under long-term compression.

[0045] Optionally, during the fixed connection process, the coupling 6 must ensure that the center lines of the first platform 11, the buffer pad 7, and the isolation pressure plate 8 are precisely aligned to ensure the integrity of the upper inertial platform and avoid vibration reduction failure caused by platform displacement. At the same time, bolts are used to pass through the preset mounting holes of each layer in sequence, and elastic washers are used for pre-tightening. This can ensure the stability of the component connection and effectively reduce the risk of component resonance.

[0046] Optionally, the buffer layer 7 is made of rubber pads, which are made of natural or synthetic rubber and have high elasticity and flexibility. They can effectively absorb the high-frequency vibration energy generated during the operation of the fan, as well as the instantaneous impact force transmitted, and protect the subsequent vibration reduction structure.

[0047] The thickness and hardness of the rubber pads need to be precisely matched according to the fan model, operating power and installation environment to ensure that they can maintain good elastic deformation capacity while bearing the weight of the equipment. In addition, the surface of the rubber pads is often designed with anti-slip textures or vulcanization treatment to increase the friction with the upper and lower contact surfaces and prevent displacement during equipment operation.

[0048] Secondly, for high-power fans, a multi-layered rubber pad structure can be used, with thin metal plates placed between the layers to reinforce the constraint. This not only improves the overall load-bearing strength but also further dissipates vibration energy through the shear deformation of the rubber layers.

[0049] In this embodiment, specifically, the fan assembly includes a drive motor 1, an impeller 4, and a vibration damping blade shaft 5, with the drive motor 1 connected to the impeller 4 via the vibration damping blade shaft 5.

[0050] Optionally, the drive motor 1, as the power core of the fan assembly, has its output shaft coaxially connected to one end of the damping blade shaft 5 to ensure efficient and stable power transmission. The damping blade shaft 5 adopts a stepped shaft structure design, with an annular damping layer made of rubber and metal skeleton wrapped in the middle section of the shaft body. This damping layer fits tightly with the shaft body through an interference fit, effectively absorbing the radial and axial vibrations generated by the drive motor 1 during operation. The impeller 4 is fixed to the other end of the damping blade shaft 5 by a key connection. A locating pin is provided at the mating surface between the impeller 4 hub and the damping blade shaft 5 to prevent circumferential displacement of the impeller 4 during high-speed rotation.

[0051] In this embodiment, specifically, the fan assembly also includes a housing 2, an impeller 4 and a vibration damping blade shaft 5, all of which are disposed inside the housing 2, and the motor is fixed on the housing 2.

[0052] Optionally, the housing 2 is integrally die-cast from a high-strength alloy material, with a gap between its internal contour and the outer contour of the impeller 4 to ensure that the impeller 4 does not rub against the inner wall of the housing 2 during high-speed rotation. A mounting plate is provided inside the housing 2, and the motor is connected to the mounting plate via bolts.

[0053] Optionally, the casing 2 has an air inlet and an air outlet on its side. The air inlet is equipped with a removable dust filter to prevent impurities from entering the casing 2 and damaging the impeller 4 and the vibration damping blade shaft 5. The air outlet is connected to an external ventilation duct through a flange. The flange surface is machined with a sealing groove, and a rubber sealing ring is embedded in the groove to ensure airtightness during airflow and reduce wind pressure loss.

[0054] In this embodiment, specifically, the fan assembly also includes a sound insulation layer 3, which is attached to the inner wall of the casing 2. Fan vibration will cause low-frequency noise; at the same time, air flowing through the fan casing 2 will generate high-frequency aerodynamic noise. The superposition of the two will seriously affect the underground working environment, and long-term exposure may harm the hearing health of workers. Setting the sound insulation layer 3 can effectively reduce the aerodynamic noise generated when the fan is running.

[0055] In this embodiment, specifically, the sound insulation layer 3 is made of polyester fiber sound-absorbing board, and the thickness of the polyester fiber sound-absorbing board is 5-8mm.

[0056] Polyester fiber sound-absorbing panels, as the sound insulation layer 3 material, have excellent sound absorption and noise reduction performance. Their rich porous structure can effectively absorb and convert sound wave energy, thereby significantly reducing the transmission of aerodynamic noise generated by airflow disturbance and blade rotation to the outside world during the operation of the fan.

[0057] Choosing a thickness range of 5-8mm ensures a sound absorption rate of ≥0.8, guaranteeing sufficient sound wave attenuation without excessively occupying the space inside the casing 2 for ventilation and component installation. This ensures that the fan assembly achieves good sound insulation while maintaining its normal ventilation performance and structural compactness.

[0058] Optionally, the casing 2 includes two metal layers, with a polyester fiber sound-absorbing panel filling between the two metal layers. This composite structure design of the double metal layers and the middle polyester fiber sound-absorbing panel can not only significantly improve the overall structural strength and deformation resistance of the casing 2 and effectively cope with the vibration and impact during the operation of the ventilator, but also prevent the sound insulation layer 3 from being directly exposed to the outside and suffering from wear and aging caused by long-term airflow scouring, thereby extending the service life of the sound insulation layer 3 and ensuring its long-lasting and stable sound insulation and noise reduction effect.

[0059] When polyester fiber sound-absorbing panels are filled between two metal layers, it is necessary to ensure that they adhere tightly to the metal layers. This can be achieved by bonding and fixing them with environmentally friendly adhesives to prevent loosening or displacement between the sound-absorbing panels and the metal layers when the fan vibrates during operation, which would affect the sound insulation performance. At the same time, the choice of adhesive should take into account its high temperature resistance and aging resistance to adapt to the temperature changes that may occur when the fan is working.

[0060] In this embodiment, specifically, the composite vibration damping fan also includes a support leg 10, and the housing 2 is fixed to the first platform 11 by the support leg 10.

[0061] The number of support legs 10 is preferably four, which are symmetrically distributed at the four corners of the bottom of the housing 2 to ensure a stable four-point support structure for the housing 2. This layout design can evenly distribute the weight of the housing 2 and effectively improve the stability of the composite vibration damping fan when it is placed on the first platform 11.

[0062] Optionally, the support leg 10 is made of high-strength alloy steel, which has good load-bearing capacity and deformation resistance. The bottom end of the support leg 10 is fixedly connected to the first platform 11 by bolts.

[0063] In this embodiment, specifically, the composite vibration damping ventilator also includes a concrete support leg 14 and a foundation horizontal plate 15. The concrete support leg 14 is disposed on the foundation horizontal plate 15, and the damping layer 9 is disposed on the concrete support leg 14. Optionally, a fastener for fixing to the ground is installed at the lower end of the foundation horizontal plate 15.

[0064] Optionally, expansion bolts are used for fasteners to ensure a rigid connection between the foundation horizontal plate 15 and the ground foundation, and the damping layer 9 is bonded to the concrete leg 14 with a special building structural adhesive.

[0065] In this embodiment, specifically, the elastic layer 12 includes a plurality of vibration isolation springs, which are evenly distributed between the first platform 11 and the second platform 13.

[0066] Optionally, the vibration isolation spring is made of high-strength alloy material, and the surface is treated with a special galvanizing and passivation composite process to form a dense protective film that can resist the erosion of corrosive media in the well, ensuring that it has certain fatigue resistance and corrosion resistance properties to adapt to the humid environment in the well.

[0067] In this embodiment, specifically, a support ladder is provided between the first platform 11 and the second platform 13. The support ladder is fixed on the second platform 13, and the upper end of the support ladder abuts against the coupling 6 to support the coupling 6. In addition, the support ladder can also increase the overall weight of the fan, thereby lowering the overall center of gravity and further improving the stability of the fan.

[0068] Optionally, the supporting platform is constructed by alternating layers of steel plates and rubber pads, providing a certain degree of vibration damping. Some vibrations are transmitted to the supporting platform through coupling 6. The elastic deformation of the rubber pads absorbs some of the vibration waves, while the steel plates, with their rigid support, limit excessive displacement. The synergistic effect of both significantly improves the vibration damping performance. The trapezoidal structure design not only reduces material consumption but also gives it a certain aesthetic appeal.

[0069] This invention employs a multi-stage composite structure combining low-frequency vibration isolation and high-frequency vibration absorption to specifically address the vibration problem of the ventilator at different frequencies. Simultaneously, the polyester fiber sound-absorbing panel installed on the inner wall of the fan casing 2 directly reduces aerodynamic noise, thus achieving a dual effect of vibration reduction and noise reduction. The device has a robust overall structure, can adapt to the harsh underground environment, effectively extends the service life of the ventilator, and significantly improves the quality of the underground working environment.

[0070] The installation steps for the composite vibration damping ventilator are as follows:

[0071] The concrete legs 14 are evenly arranged on the foundation horizontal plate 15. Then, the damping layer 9 is placed on the concrete legs 14 and fixed as a whole. Next, the second platform 13 is fixed on the concrete legs 14, thereby constructing the second-level vibration isolation layer.

[0072] At the top of the second platform 13, vibration isolation springs are evenly installed to form the first level of vibration isolation layer. Then, the isolation pressure plate 8 is fixed to the top of the vibration isolation springs with screws, and a buffer pad layer 7 is placed on top of the isolation pressure plate 8.

[0073] Next, the first platform 11 is placed on top of the buffer pad 7, and the first platform 11, the buffer pad 7 and the isolation pressure plate 8 are connected and fixed using the coupling 6 and bolts to ensure that the first platform 11 is stable and has no displacement.

[0074] Finally, the wind turbine assembly is fixed to the first platform 11 via the support leg 10.

[0075] Optionally, after the fan assembly is fixed, the overall installation structure needs to be leveled. A level should be used to measure at multiple points on the first platform 11 and the top plane of the fan assembly. Then, check the tightness of all connecting bolts to prevent loosening due to vibration. Next, verify the compression of the vibration isolation springs to ensure that the compression of each spring is uniform, thus guaranteeing balanced force on the vibration isolation system. During installation, attention should also be paid to the tightness of the contact between the damping layer 9 and the concrete support leg 14, and between the buffer pad layer 7 and the isolation pressure plate 8, to avoid gaps that could affect the vibration reduction effect.

[0076] When in use, the drive motor 1 starts, driving the impeller 4 to rotate. The aerodynamic noise generated by the rotation of the impeller 4 is effectively absorbed and weakened by the polyester fiber sound-absorbing panel on the inner wall of the casing 2.

[0077] The vibration generated by impeller 4 is transmitted sequentially: First, the radial vibration of impeller 4 is initially weakened by the damping blade shaft 5, and then transmitted to the entire fan assembly. The vibration of the fan assembly is transmitted to the first platform 11 via the support leg 10. The coupling 6 ensures the stability of the platform and prevents the vibration from causing the first platform 11 to shift. After the vibration is buffered by the rubber pad of the buffer pad layer 7, it is transmitted to the vibration isolation spring of the elastic layer 12. The first-level vibration isolation layer can isolate more than 80% of the low-frequency vibration. The remaining high-frequency vibration is transmitted to the damping block of the damping layer 9 via the second platform 13. The second-level vibration isolation layer absorbs the remaining high-frequency vibration. Finally, only a small amount of residual vibration is transmitted to the concrete support leg 14.

[0078] These minute vibrations, after being isolated by multiple layers, are transmitted to the concrete support leg 14. Due to the high stiffness and mass of the concrete material itself, the vibration energy is further dispersed and dissipated. Ultimately, the vibration transmitted to the external environment during the operation of the entire equipment is controlled at an extremely low level, effectively avoiding adverse effects on surrounding equipment, building structures, and operators caused by excessive vibration. This achieves the simultaneous effect of vibration reduction and noise reduction.

[0079] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other modifications under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these modifications are within the protection scope of the present invention.

Claims

1. A composite vibration-damping ventilator, characterized in that, include: A wind turbine assembly and a first platform, wherein the wind turbine assembly is mounted on the first platform; The second platform is located on the side of the first platform away from the wind turbine assembly; An elastic layer is disposed between the first platform and the second platform, with one end of the elastic layer connected to the first platform and the other end of the elastic layer connected to the second platform; A damping layer is disposed on the side of the second platform opposite to the first platform.

2. The composite vibration damping ventilator according to claim 1, characterized in that, The composite vibration damping ventilator also includes a buffer pad layer and an isolation plate. The first platform, the buffer pad layer and the isolation plate are arranged sequentially from top to bottom and fixedly connected by a coupling. The side of the isolation plate away from the first platform is connected to the elastic layer.

3. The composite vibration damping ventilator according to claim 1, characterized in that, The fan assembly includes a drive motor, an impeller, and a vibration damping blade shaft, with the drive motor connected to the impeller via the vibration damping blade shaft.

4. A composite vibration damping ventilator according to claim 3, characterized in that, The fan assembly also includes a housing, the impeller and the vibration damping blade shaft are both located inside the housing, and the motor is fixed to the housing.

5. A composite vibration damping ventilator according to claim 4, characterized in that, The fan assembly also includes a sound insulation layer, which is attached to the inner wall of the housing.

6. A composite vibration-damping ventilator according to claim 5, characterized in that, The sound insulation layer is made of polyester fiber sound-absorbing board, and the thickness of the polyester fiber sound-absorbing board is 5-8mm.

7. A composite vibration damping ventilator according to claim 4, characterized in that, The composite vibration damping fan also includes support legs, and the casing is fixed to the first platform by the support legs.

8. A composite vibration damping ventilator according to claim 1, characterized in that, The composite vibration damping ventilator also includes concrete legs and a foundation horizontal plate, with the concrete legs mounted on the foundation horizontal plate and the damping layer mounted on the concrete legs.

9. A composite vibration damping ventilator according to claim 1, characterized in that, The elastic layer includes multiple vibration isolation springs, which are evenly distributed between the first platform and the second platform.

10. A composite vibration damping ventilator according to claim 2, characterized in that, A support ladder is provided between the first platform and the second platform. The support ladder is fixed to the second platform, and the upper end of the support ladder abuts against the coupling.

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