Self-adaptive vibration suppression device of fan driving system

Abstract

The invention relates to the technical field of vibration suppression equipment, and provides a self-adaptive vibration suppression device of a fan driving system, the self-adaptive vibration suppression device comprises a rigid base plane, a mounting platform and a fan driving system fixedly mounted on the mounting platform, and the mounting platform is erected on the rigid base plane through a plurality of supporting assemblies; a vibration suppression unit is arranged on the mounting platform, a two-way reciprocating lead screw is rotationally connected to the interior of the vibration suppression unit, and one end of the two-way reciprocating lead screw penetrates through the mounting platform and is in threaded connection with the rigid base plane; the vibration suppression unit further comprises a sector gear rotating synchronously with the two-way reciprocating lead screw and a rack meshed with the sector gear, and the rack is in rigid connection with the fan driving system. When the fan driving system generates vibration, the rack is driven to reciprocate and drive the sector gear to swing, so that the bidirectional reciprocating lead screw is screwed into the rigid base plane in the vibration process to pull the mounting platform to press downwards and compress the supporting assembly, and supporting rigidity adjustment is achieved.

Description

Technical Field

[0001] This invention relates to the field of vibration damping equipment technology, and specifically to an adaptive vibration damping device for a fan drive system. Background Technology

[0002] As a core driving device in industrial production and ventilation systems, the operational stability of fans directly affects production safety and efficiency. Due to factors such as uneven mass distribution of fan blades, shaft alignment errors, or airflow excitation, fan drive systems inevitably generate vibrations during operation. Traditional vibration suppression devices mostly use springs or rubber damping pads with fixed stiffness, which cannot adjust the support stiffness according to changes in fan speed or vibration intensity fluctuations. At certain frequencies, the system is prone to entering the resonance zone, resulting in limited vibration suppression effectiveness. Therefore, we propose an adaptive vibration suppression device for fan drive systems. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an adaptive vibration damping device for a wind turbine drive system, which overcomes the deficiencies of existing technologies, has a reasonable design, a compact structure, and solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An adaptive vibration damping device for a wind turbine drive system includes a rigid base, a mounting platform, and a wind turbine drive system fixedly mounted on the mounting platform. The mounting platform is supported on the rigid base by several support components.

[0006] The mounting platform is equipped with a vibration damping unit, and a bidirectional reciprocating screw is rotatably connected inside the vibration damping unit. One end of the bidirectional reciprocating screw passes through the mounting platform and is threadedly connected to the rigid base surface.

[0007] The vibration damping unit also includes a sector gear that rotates synchronously with the bidirectional reciprocating screw, and a rack that meshes with the sector gear. The rack is rigidly connected to the fan drive system.

[0008] When the fan drive system vibrates, it drives the rack to move back and forth and drives the sector gear to swing, so that the bidirectional reciprocating screw is screwed into the rigid base during the vibration process, thereby pulling the installation platform down and compressing the support components to achieve support stiffness adjustment.

[0009] Preferably, the vibration damping unit is further provided with a fixed damping disc inside, and the back of the sector gear is provided with an arc-shaped protrusion extending along the swing trajectory, and the damping disc is provided with a damping groove that matches the arc-shaped protrusion.

[0010] Preferably, the two ends of the arc-shaped protrusion are provided with a first gradual transition surface, and the two ends of the damping groove are provided with a second gradual transition surface corresponding to the first gradual transition surface. The damping braking force is generated by the interference friction between the first gradual transition surface and the second gradual transition surface.

[0011] Preferably, the vibration damping unit also includes a guide seat, with both ends of the rack slidably mounted in the guide groove of the guide seat.

[0012] Preferably, multiple vibration damping units are provided, and the multiple vibration damping units are symmetrically distributed around the installation platform.

[0013] Preferably, the static pre-compression of the support component is less than 10% of its free height.

[0014] Preferably, a crescent pin is provided in the threaded hole of the rigid base surface, and the surface of the bidirectional reciprocating screw has intersecting left-hand helical grooves and right-hand helical grooves. The crescent pin cooperates with the helical grooves to guide the bidirectional reciprocating screw to generate downward axial displacement when rotating in both directions.

[0015] Preferably, the threaded pair between the bidirectional reciprocating screw and the rigid base surface has a self-locking characteristic.

[0016] This invention provides an adaptive vibration damping device for a wind turbine drive system. It has the following beneficial effects:

[0017] 1. By meshing the rack and pinion gears, the horizontal vibration of the fan system is converted into the rotational motion of the bidirectional reciprocating screw. Utilizing the principle of "more forward, less backward," the screw gradually screws into the rigid base during vibration, actively pulling the installation platform down and compressing the support components. This allows the support stiffness to be increased in real time according to the vibration intensity, achieving adaptive vibration suppression.

[0018] 2. By using a bidirectional helical groove in conjunction with a crescent pin, and supplemented by progressive friction damping, "soft braking" is achieved during the rotation of the lead screw. This not only avoids hard mechanical collisions and protects the crescent pin, the core transmission component, from being sheared off, but also eliminates secondary knocking noise that may be generated when the vibration direction changes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the vibration damping unit of the present invention;

[0021] Figure 3 This is a schematic diagram of the sector gear of the present invention;

[0022] Figure 4 This is a schematic diagram of the damping disc of the present invention.

[0023] In the diagram: 1. Rigid base; 11. Support component; 2. Mounting platform; 21. Fan drive system; 3. Vibration damping unit; 31. Damping disc; 311. Damping groove; 32. Sector gear; 321. Damping protrusion; 33. Bidirectional reciprocating screw; 34. Guide seat; 35. Rack. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of this invention, not all of it. All other works obtained by those skilled in the art based on this invention without inventive effort are within the scope of protection of this invention.

[0025] See attached document Figures 1-4 An adaptive vibration damping device for a wind turbine drive system includes a rigid base 1, a support component 11, a mounting platform 2, a wind turbine drive system 21, and a vibration damping unit 3.

[0026] The fan drive system 21 is fixedly installed on the mounting platform 2, and the mounting platform 2 is supported on a rigid base 1 by a number of support components 11. The rigid base 1 can be any fixed interface that can provide stable support, such as a cement floor, factory floor, load-bearing wall, large machinery base, etc. Preferably, the static pre-compression of the support components 11 is less than 10% of their free height to ensure sufficient elastic travel when supporting heavy equipment.

[0027] Multiple vibration damping units 3 are provided on the mounting platform 2, and the vibration damping units 3 are symmetrically distributed around the mounting platform 2. The vibration damping unit 3 includes a housing, the bottom of which is fixedly mounted on the upper surface of the mounting platform 2. Inside the vibration damping unit 3, there are concentrically arranged damping discs 31, sector gears 32, and bidirectional reciprocating screws 33. The damping disc 31 is fixed to the top of the housing. One end of the bidirectional reciprocating screw 33 is fixed to the sector gear 32 and passes through the damping disc 31 and is rotatably connected to the housing of the vibration damping unit 3 through a bearing. The other end of the bidirectional reciprocating screw 33 passes vertically downward through a pre-set through hole in the mounting platform 2 and is threadedly connected to the rigid base surface 1. It should be noted that the threaded pair between the bidirectional reciprocating screw 33 and the rigid base surface 1 has a self-locking characteristic.

[0028] A guide seat 34 is also provided on the housing of the vibration damping unit 3, and the extended sections at both ends of the rack 35 are slidably installed in the guide grooves opened on the guide seat 34. The extended section of the rack 35 near the fan drive system 21 is rigidly connected to the housing or base of the fan drive system 21, and the rack 35 meshes with the sector gear 32.

[0029] The back of the sector gear 32 is provided with an arc-shaped protrusion 321 extending along its swing trajectory. The two ends of the arc-shaped protrusion are provided with a first gradient transition surface. The damping disk 31 is provided with a damping groove (311) that matches the arc-shaped protrusion 321. The two ends of the damping groove (311) are provided with a second gradient transition surface corresponding to the first gradient transition surface.

[0030] When the fan vibrates and drives the sector gear 32 to swing, the first and second gradual transition surfaces make interference contact and rub against each other as the swing amplitude increases, thereby generating nonlinear damping braking force. At the same time, the bidirectional reciprocating screw 33 is tightened to the rigid base surface 1 to improve the overall support rigidity and suppress vibration. It also transfers the vibration intensity of the branch drive system 21 to the tightness of the bidirectional reciprocating screw 33 and the rigid base surface 1 to achieve adaptive vibration suppression.

[0031] When the fan drive system 21 generates horizontal vibration, it drives the rack 35 to slide linearly back and forth within the guide seat 34. The rack 35 drives the sector gear 32 to oscillate back and forth, synchronously driving the bidirectional reciprocating screw 33 to rotate. Since the bidirectional reciprocating screw 33 is threadedly connected to the rigid base surface 1, when the vibration peak drives the screw to rotate in the advancing direction, the instantaneous impact force overcomes the friction force to achieve screwing in; when the vibration returns, the damping braking force generated by the interference friction between the first and second gradual transition surfaces, combined with the thread self-locking, effectively blocks the rotational displacement of the screw in the exit direction.

[0032] During reciprocating vibration, because the screwing resistance is less than the screwing-out resistance, the net displacement of the bidirectional reciprocating screw 33 within one vibration cycle is downward screwing. This "more in, less out" effect causes the screw to gradually screw into the threaded hole of the rigid base surface 1, generating a continuously increasing downward traction force. As the screw 33 gradually screws in, it forcibly pulls the mounting platform 2 down and compresses the support assembly 11, thereby improving the overall system's support stiffness.

[0033] The second embodiment differs from the first embodiment in that a crescent pin is provided in the threaded hole of the rigid base surface 1.

[0034] The bidirectional reciprocating screw 33 has intersecting left-hand and right-hand helical grooves on its surface, which are connected and engaged with its crescent pin. When the bidirectional reciprocating screw 33 rotates back and forth with vibration, the crescent pin swings adaptively at the reversal point of the helical groove. Since the threaded hole is fixed on the rigid base surface 1, the bidirectional reciprocating screw 33 generates a tightened axial displacement during both clockwise and counterclockwise strokes, causing it to pull the mounting platform 2 down gradually. The first and second gradual transition surfaces provide a "soft brake" for the rotation of the screw through progressive frictional damping, avoiding mechanical hard collisions and protecting the crescent pin from being sheared off by strong force. Since there is a fit gap between the bidirectional reciprocating screw 33 and the crescent pin, the screw will generate a small axial movement at the moment of switching vibration direction. Due to the presence of the progressive frictional damping, no secondary knocking noise will be generated at the moment of reversal.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0036] The above description is only used to illustrate the technical solutions of the present invention, and is not intended to limit them. Although the present invention has been described in detail with reference to the foregoing, those skilled in the art should understand that modifications can still be made to the foregoing technical solutions, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An adaptive vibration damping device for a wind turbine drive system, comprising a rigid base (1), a mounting platform (2), and a wind turbine drive system (21) fixedly mounted on the mounting platform (2), characterized in that: The installation platform (2) is mounted on a rigid base (1) by a number of support components (11); The installation platform (2) is equipped with a vibration damping unit (3). The vibration damping unit (3) is rotatably connected to a bidirectional reciprocating screw (33), and one end of the bidirectional reciprocating screw (33) passes through the installation platform (2) and is threadedly connected to the rigid base surface (1). The vibration damping unit (3) also includes a sector gear (32) that rotates synchronously with the bidirectional reciprocating screw (33), and a rack (35) that meshes with the sector gear (32). The rack (35) is rigidly connected to the fan drive system (21). When the fan drive system (21) vibrates, it drives the rack (35) to move back and forth and drives the sector gear (32) to swing, so that the bidirectional reciprocating screw (33) is screwed into the rigid base surface (1) during the vibration process, so as to pull the installation platform (2) down and compress the support assembly (11) to achieve the adjustment of support stiffness.

2. The adaptive vibration damping device for a wind turbine drive system according to claim 1, characterized in that: The vibration damping unit (3) is also provided with a fixed damping disc (31), and the back of the sector gear (32) is provided with an arc-shaped protrusion (321) extending along the swing trajectory. The damping disc (31) is provided with a damping groove (311) that matches the arc-shaped protrusion (321).

3. The adaptive vibration damping device for a wind turbine drive system according to claim 2, characterized in that: The arc-shaped protrusion (321) has a first gradient transition surface at both ends, and the damping groove (311) has a second gradient transition surface at both ends corresponding to the first gradient transition surface. The damping braking force is generated by the interference friction between the first gradient transition surface and the second gradient transition surface.

4. The adaptive vibration damping device for a wind turbine drive system according to claim 1, characterized in that: The vibration damping unit (3) also includes a guide seat (34), and the two ends of the rack (35) are slidably installed in the guide groove of the guide seat (34).

5. The adaptive vibration damping device for a wind turbine drive system according to claim 1, characterized in that: Multiple vibration damping units (3) are provided, and the multiple vibration damping units (3) are symmetrically distributed around the installation platform (2).

6. The adaptive vibration damping device for a wind turbine drive system according to claim 1, characterized in that: The static pre-compression of the support component (11) is less than 10% of its free height.

7. The adaptive vibration damping device for a wind turbine drive system according to claim 1, characterized in that: A crescent pin is provided in the threaded hole of the rigid base surface (1). The surface of the bidirectional reciprocating screw (33) has intersecting left-hand spiral grooves and right-hand spiral grooves. The crescent pin and the spiral grooves cooperate to guide the bidirectional reciprocating screw (33) to generate downward axial displacement when rotating in both directions.

8. The adaptive vibration damping device for a wind turbine drive system according to claim 1, characterized in that: The threaded pair between the bidirectional reciprocating screw (33) and the rigid base (1) has self-locking characteristics.

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