Adaptive vibration damping device
The adaptive vibration damping device, through the combination of guide rail module and center of gravity traction module, utilizes inertial force and elastic traction force to adaptively move, solving the vibration problem of high-speed fans near the critical speed, and achieving the effects of simplified structure and reduced vibration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2023-08-21
- Publication Date
- 2026-07-21
Smart Images
Figure CN117170423B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of vibration control technology, and in particular to adaptive vibration damping devices. Background Technology
[0002] According to the basic theory of rotor dynamics, a general synchronous precession problem will exist in the actual operation of a dynamically unbalanced impeller and its flexible shaft, such as... Figure 1 As shown, with the widespread use of modern high-speed fans, the speed of more and more fans is approaching or completely exceeding the first critical speed of the rotor. The synchronous precession of the impeller rotor running near the critical speed will more easily excite its corresponding modes, thus leading to greater vibration problems.
[0003] Before mass production and installation, wind turbine impellers undergo dynamic balancing to reduce vibration caused by dynamic imbalance during assembly and operation. However, this does not guarantee complete dynamic balance. Even for low-speed impeller shaft systems, due to the specific nature of their working environment, such as oil fume environments, the accumulation of oil stains or dust over time can deteriorate the rotor's original dynamic balance, leading to increased impeller rotor vibration. Summary of the Invention
[0004] To address at least one of the aforementioned technical problems, this disclosure proposes an adaptive vibration damping device.
[0005] According to one aspect of this disclosure, an adaptive vibration damping device is provided, comprising: a guide rail module, a center of gravity traction module, and a conduit module, wherein the guide rail module and the conduit module are connected, and the center of gravity traction module includes a sphere and a traction unit, wherein the sphere and the traction unit are connected.
[0006] The traction unit is disposed in the catheter module, and the traction unit is used to provide elastic traction force to the sphere;
[0007] The sphere is disposed within the guide rail module, and under the constraint of the elastic traction force of the traction unit, the sphere moves adaptively within the guide rail module based on inertial force.
[0008] In some possible implementations, the guide rail module includes a carrier unit and a track unit, the carrier unit including a fluid guide front end and a fluid guide rear end, and the track unit being disposed inside the fluid guide rear end.
[0009] In some possible implementations, the carrier unit is an axisymmetric object, the fluid guide rear end is connected to the conduit module, and the track unit is symmetrical about the line on which the conduit module is located.
[0010] In some possible implementations, the width and height of the track unit are adapted to the diameter of the sphere, and the track unit includes a first terminal and a second terminal, both of which are provided with an arc adapted to the sphere.
[0011] In some possible implementations, the carrier unit is a hollow ellipsoid, the front end of the fluid guide is the upper hemisphere of the ellipsoid, the rear end of the fluid guide is the lower hemisphere of the ellipsoid, and the track unit is disposed between the hollow part of the rear end of the fluid guide and the spherical surface.
[0012] In some possible implementations, the traction unit includes a traction rope and a traction spring, the traction rope and the traction spring being connected, the traction rope being connected to the ball, and the ball bringing the traction rope into the guide rail module when the guide rail module moves.
[0013] In some possible implementations, the width and height of the catheter module are adapted to the width and height of the traction spring, respectively, and the stiffness coefficient of the traction spring is in the range of 5N / mm-10N / mm.
[0014] In some possible implementations, the conduit module is provided with a guide tube of a preset length at the connection point with the guide rail module, and the guide tube is used to constrain the sliding direction of the traction rope.
[0015] In some possible implementations, a predetermined number of reinforcing beams are provided on the outside of the catheter module, the reinforcing beams being used to stabilize the catheter module.
[0016] In some possible implementations, the system further includes a tightening nut fixedly connected to the conduit module, the tightening nut being used to connect the adaptive vibration damping device and the flexible shaft for which vibration suppression is required.
[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.
[0018] Implementing this disclosure will have the following beneficial effects:
[0019] A traction unit is disposed within the guide tube module, providing elastic traction force to the sphere. The sphere is disposed within the guide rail module, and under the constraint of the elastic traction force of the traction unit, it adaptively moves within the guide rail module based on inertial force. When the object being adjusted rotates away from its ideal center, due to the inertial force, the sphere adaptively moves within the guide rail module based on the constraint of the elastic traction force, thereby counteracting some of the eccentric force on the object being adjusted, reducing the vibration level of the object, eliminating the need for additional control components such as electrical control, resulting in a simple structure, cost savings, and high reliability.
[0020] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0022] Figure 1 This diagram illustrates the principle of precession of a flexible rotating shaft constrained at one end in the prior art.
[0023] Figure 2 A schematic diagram of the structure of the adaptive vibration damping device according to an embodiment of the present disclosure is shown;
[0024] Figure 3 A structural schematic diagram showing the installation position of the adaptive vibration damping device according to an embodiment of the present disclosure is shown;
[0025] Figure 4 A structural schematic diagram showing the location of the track unit according to an embodiment of the present disclosure is shown;
[0026] Figure 5 A schematic diagram of the structure of a carrier unit according to an embodiment of the present disclosure is shown;
[0027] Figure 6 A schematic diagram of the adaptive vibration damping device for correcting deviations according to an embodiment of the present disclosure is shown.
[0028] Figure 7 A schematic diagram of the adaptive vibration damping device for correction under acceleration conditions according to an embodiment of the present disclosure is shown.
[0029] Figure Labels
[0030] 100. Adaptive vibration damping device; 1. Guide rail module; 2. Conduit module; 31. Sphere; 32. Traction unit; 11. Carrier unit; 12. Track unit; 111. Front end of the guide fluid; 112. Rear end of the guide fluid; Detailed Implementation
[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.
[0032] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.
[0033] Figure 2 An adaptive vibration damping device 100 according to an embodiment of the present disclosure is shown, such as Figure 1 As shown, the above-mentioned device includes:
[0034] The sphere 31 and the traction unit 32 are connected;
[0035] The traction unit 32 is disposed in the catheter module 2, and the traction unit 32 is used to provide elastic traction force to the ball 31;
[0036] The sphere 31 is disposed inside the guide rail module 1. Under the constraint of the elastic traction force of the traction unit 32, the sphere 31 moves adaptively in the guide rail module 1 based on inertial force.
[0037] The guide rail module 1 and the conduit module 2 are externally fixedly connected and internally connected. The center of gravity traction module is set inside the guide rail module 1 and the conduit module 2. The center of gravity traction module includes a ball 31 and a traction unit 32. The ball 31 and the traction unit 32 are connected. The ball 31 is set inside the guide rail module 1. One end of the traction unit 32 is fixed inside the conduit module 2. When the adaptive suppression device is subjected to external force, under the constraint of the elastic traction force of the traction unit 32, the ball 31 can move adaptively within the guide rail module 1 based on inertial force to offset part of the external force.
[0038] Please see Figure 3 In some embodiments, the adaptive vibration damping device 100 can be located at the unconstrained end of the flexible shaft. The flexible shaft can be a shaft with one end fixed and constrained while the other end is not fixed. The flexible shaft can be a shaft within a fan impeller shaft system. The adaptive vibration damping device 100 is fixed to the unconstrained end of the flexible shaft by tightening a nut, and is used to automatically adjust the vibration of the flexible shaft during rotation within the fan impeller shaft system. During the rotation of the flexible shaft, the ball 31 will adaptively move along the guide rail module 1 under the action of inertial force, thereby counteracting part of the eccentric force during the rotation of the flexible shaft and reducing the vibration of the flexible shaft. The flexible shaft is the adjustment target of the automatic vibration suppression system.
[0039] In some embodiments, the sphere 31 is a perfect sphere 31, which can move smoothly in any direction, and the mass of the sphere 31 is set according to actual needs.
[0040] The above technical solution utilizes the simple structure of the adaptive vibration damping device 100. When the object being adjusted rotates, and a force is applied to the adaptive damping device, the ball 31 inside the guide rail module 1 will move adaptively under the action of inertial force and the constraint of the traction force of the traction unit 32. This offsets part of the eccentric force during the rotation of the flexible rotating shaft, effectively reducing the vibration of the object being adjusted. It does not require additional control components such as electrical control, has a simple structure, saves costs, and is reliable.
[0041] Please see Figure 4 In some embodiments, the guide rail module 1 includes a carrier unit 11 and a track unit 12. The carrier unit 11 includes a fluid guiding front end 111 and a fluid guiding rear end 112, and the track unit 12 is disposed inside the fluid guiding rear end 112.
[0042] The front end 111 and the rear end 112 of the fluid guide each occupy half of the guide rail module 1. The track unit 12 is set inside the rear end 112 of the fluid guide. The rear end 112 of the fluid guide is fixedly connected to the conduit module 2. The track unit 12 inside the rear end 112 of the fluid guide is connected to the conduit module 2. The sphere 31 can move adaptively within the track unit 12 of the rear end 112 of the fluid guide.
[0043] The above technical solution places the track unit 12 inside the carrier unit 11, reducing the influence of external factors when the sphere 31 moves adaptively.
[0044] In some embodiments, the carrier unit 11 is an axisymmetric object, the fluid guide rear end 112 is connected to the conduit module 2, and the track unit 12 is symmetrical about the line on which the conduit module 2 is located.
[0045] The structure of the carrier unit 11 can be an axisymmetric structure. The track unit 12 of the fluid guide rear end 112 is symmetrical about the center line of the conduit module 2. When the adaptive vibration damping device 100 is vertically stationary and not subjected to external force, the sphere 31 is at the center of the track unit 12, that is, at the connection between the track unit 12 and the conduit module 2.
[0046] In the above technical solution, the track units 12 are symmetrically arranged to ensure that the motion conditions on both sides of the sphere 31 are the same and the resulting correction force is the same.
[0047] In some embodiments, the width and height of the track unit 12 are adapted to the diameter of the sphere 31. The track unit 12 includes a first terminal and a second terminal, both of which are provided with an arc adapted to the sphere 31.
[0048] Specifically, the internal space of the track unit 12 is adapted to the size of the sphere 31, and the inner wall of the track unit 12 is smooth, so that the sphere 31 is not affected by additional friction when it moves in the track unit 12. The two ends of the track unit 12 that contact the front end of the conductor are the first terminal and the second terminal, respectively. Both the first terminal and the second terminal are provided with an arc adapted to the sphere 31 to reduce the pressure damage caused by the sphere 31 hitting the first terminal or the second terminal.
[0049] The above technical solution features a well-designed internal structure for the track unit 12, which reduces unnecessary external forces acting on the sphere 31 during its movement.
[0050] Please see Figure 5 In some embodiments, the carrier unit 11 is a hollow ellipsoid, the front end 111 of the fluid guide is the upper hemisphere of the ellipsoid, the rear end 112 of the fluid guide is the lower hemisphere of the ellipsoid, and the track unit 12 is disposed between the hollow part and the spherical surface of the rear end 112 of the fluid guide.
[0051] The carrier unit 11 can be a hollow ellipsoid, which is divided into an upper hemisphere, i.e., the front end 111 of the guide fluid, and a lower hemisphere, i.e., the rear end 112 of the guide fluid, along its minor axis. The track unit 12 is located at the rear end 112 of the guide fluid and is symmetrical about the major axis of the ellipsoid.
[0052] In some embodiments, the length of the track unit 12 is adapted to the lower hemisphere portion of the ellipsoid.
[0053] In some embodiments, the carrier unit 11 may also be a hollow sphere 31 with a diameter much larger than the sphere 31 described above, and this is not limited here.
[0054] The above technical solution sets the carrier unit 11 as a hollow ellipse to reduce the influence of the adaptive vibration damping unit itself on the resistance of the wind turbine inlet channel where the object under test is located.
[0055] In some embodiments, the traction unit 32 includes a traction rope and a traction spring, the traction rope and the traction spring are connected, the traction rope and the ball 31 are connected, and the ball 31 brings the traction rope into the guide rail module 1 when the guide rail module 1 moves.
[0056] Specifically, the traction unit 32 consists of a traction rope and a traction spring. The traction rope and the traction spring are fixedly connected. The traction spring is fixed at one end of the conduit module 2. The end of the traction rope that passes through the conduit module 2 and connects with the guide rail module 1 is fixedly connected to the ball 31.
[0057] When the adaptive vibration damping device 100 is subjected to an external force, the ball 31 can move adaptively to pull the traction rope and is constrained by the traction force of the traction spring.
[0058] In the above technical solution, the traction spring is connected to the ball 31 through the traction rope to provide adaptive elastic traction force, providing appropriate traction force to the ball 31 and ensuring the stability of the adaptive vibration damping device 100.
[0059] In some embodiments, the width and height of the catheter module 2 are adapted to the width and height of the traction spring, respectively, and the stiffness coefficient of the traction spring is in the range of 5N / mm-10N / mm.
[0060] The height and width of the conduit module 2 are adapted to the height and width of the traction spring to prevent the traction spring from tilting left and right under the pull of the ball 31, thus preventing unnecessary external forces. Secondly, in this embodiment, the stiffness coefficient of the traction spring can be in the range of 5N / mm-10N / mm. In other embodiments, the stiffness coefficient of the traction spring can be set to other reasonable ranges to prevent the stiffness coefficient of the traction spring from being too large, which would exert excessive constraint force on the ball 31 and affect its adaptive movement, or the stiffness coefficient of the traction spring from being too small, which would fail to provide suitable traction force to the ball 31.
[0061] In some embodiments, the length of the traction spring is set based on actual needs and is not limited here.
[0062] In some embodiments, the conduit module 2 is provided with a guide tube of a preset length at the connection point with the guide rail module 1, and the guide tube is used to constrain the sliding direction of the traction rope.
[0063] Specifically, a guide tube of preset length is provided at the connection between the conduit module 2 and the guide rail module 1. The width and height of the guide tube are adapted to the thickness of the traction rope to prevent the traction rope from moving left and right under the traction force of the ball 31 and to ensure the linear movement of the traction rope.
[0064] The above technical solution constrains the sliding direction of the traction rope by using a guide tube, thus avoiding unnecessary external forces during the movement of the ball 31 and affecting its adaptive motion.
[0065] In some embodiments, a predetermined number of reinforcing beams are provided on the outside of the catheter module 2, and the reinforcing beams are used to stabilize the catheter module 2.
[0066] Specifically, a preset number of reinforcing beams are set on the outside of the conduit module 2 to wrap around the conduit module 2, thereby increasing the rigidity of the conduit module 2 and preventing the conduit module 2 from bending and deforming when the adaptive vibration damping device 100 rotates under external force.
[0067] In some embodiments, the system further includes a tightening nut, which is fixedly connected to the conduit module 2 and is used to connect the adaptive vibration damping device 100 and the flexible rotating shaft that needs to suppress vibration.
[0068] Specifically, tightening the nut is used to connect the adjustable object and the adaptive vibration damping device 100, so that the adaptive vibration damping device 100 can adaptively reduce the vibration of the adjustable object.
[0069] In some embodiments, the tightening nut is fixedly connected to the flexible shaft, one end of the flexible shaft is fixed and the other end is not fixed. The flexible shaft is the adjustment object of the adaptive vibration damping device 100. The flexible shaft can be the shaft in the fan impeller shaft system. The adaptive vibration damping device 100 is fixed to the unfixed end of the flexible shaft by tightening the nut, and is used to adaptively adjust the vibration in the fan impeller shaft system.
[0070] The above technical solution uses a tightening nut to fix the adaptive vibration damping device 100 onto the object being adjusted, thereby achieving vibration optimization of the object being adjusted.
[0071] In some embodiments, the adaptive vibration damping device 100 is fixed to the flexible shaft by tightening a nut. The flexible shaft can be a shaft within a fan impeller shaft system. When the impeller shaft system is in operation, the axial angle of its flexible shaft deviating from the ideal center is [missing information]. The rotational speed of the flexible shaft is ω. Due to inertial force, the sphere 31 moves from its initial position (not in operation) under the constraint of the traction spring pulled by the traction rope, and then moves relative to the track unit 12 to a certain position under the constraint of the track unit 12, such as... Figure 6 As shown. At this time, sphere 31 is subjected to a pulling force F from the traction unit. T The support force F of the orbital unit 12 N The two together constitute the centripetal force F of the sphere 31 relative to the orbital unit 12 in circular motion. C The reaction force F of sphere 31 on orbital unit 12 r Its component force F B As a corrective force, it is opposite to the eccentric load of the impeller shaft system and the deflection direction of its flexible shaft, thus forming a corrective torque, thereby reducing the deflection angle of the flexible shaft and the overall dynamic unbalanced load, and thus reducing the vibration level of the entire impeller shaft system.
[0072] As the impeller speed increases, the dynamic imbalance load on the system increases, and the axial angle of the flexible rotation axis of the impeller shaft system deviates from the ideal center. As the size increases, the position of sphere 31 within orbital unit 12 adjusts accordingly, such as... Figure 7 As shown. The centripetal force F of the adjusted sphere 31 relative to the orbital unit 12 in circular motion. C =Mω 2 The rotational speed ω of the flexible shaft in r increases simultaneously with the distance r from the center of the sphere to the major axis of the carrier unit of the ellipsoid. C As the force increases, the sphere 31 is correspondingly subjected to a pulling force F from the traction unit. T Support force F of orbital unit 12 N Both increase, thus increasing the reaction force F of sphere 31 on orbital unit 12. r Its component force F B To increase the corrective force. Simultaneously, due to the component force F B The lever arm L increases in the resulting corrective torque, thus increasing the corrective torque. This enables the provision of a large corrective torque under conditions of large dynamic unbalanced off-center load and large axial deflection angle, thereby achieving real-time adaptive adjustment of the deflection angle of the flexible shaft and the dynamic unbalanced load.
[0073] The multi-chip printed circuit board structure in this embodiment includes the multi-chip printed circuit board structure described above. A traction unit is disposed within the guide tube module, providing elastic traction force to the sphere. The sphere is disposed within the guide rail module, and under the constraint of the elastic traction force of the traction unit, the sphere adaptively moves within the guide rail module based on inertial force. When the object being adjusted rotates away from its ideal center, due to the inertial force, the sphere adaptively moves within the guide rail module based on the constraint of the elastic traction force, thereby offsetting some of the eccentric force of the object being adjusted, reducing the vibration level of the object, eliminating the need for additional control components such as electrical control, resulting in a simple structure, cost savings, and high reliability.
[0074] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An adaptive vibration damping device, characterized in that, The device includes a guide rail module, a center of gravity traction module, and a conduit module. The guide rail module and the conduit module are connected. The center of gravity traction module includes a sphere and a traction unit. The sphere and the traction unit are connected. The guide rail module includes a carrier unit and a track unit. The carrier unit includes a fluid guiding front end and a fluid guiding rear end, and the track unit is disposed inside the fluid guiding rear end. The traction unit is disposed in the catheter module, and the traction unit is used to provide elastic traction force to the sphere; The sphere is disposed within the guide rail module, and under the constraint of the elastic traction force of the traction unit, the sphere moves adaptively within the guide rail module based on inertial force.
2. The apparatus according to claim 1, characterized in that, The carrier unit is an axisymmetric object, the fluid guide rear end is connected to the conduit module, and the track unit is symmetrical about the line where the conduit module is located.
3. The apparatus according to claim 1, characterized in that, The width and height of the track unit are adapted to the diameter of the sphere. The track unit includes a first terminal and a second terminal, both of which are provided with an arc adapted to the sphere.
4. The apparatus according to claim 1, characterized in that, The carrier unit is a hollow ellipsoid, the front end of the guide fluid is the upper hemisphere of the ellipsoid, the rear end of the guide fluid is the lower hemisphere of the ellipsoid, and the track unit is disposed between the hollow part and the spherical surface at the rear end of the guide fluid.
5. The apparatus according to claim 1, characterized in that, The traction unit includes a traction rope and a traction spring. The traction rope and the traction spring are connected. The traction rope is also connected to the ball. When the guide rail module moves, the ball brings the traction rope into the guide rail module.
6. The apparatus according to claim 5, characterized in that, The width and height of the catheter module are adapted to the width and height of the traction spring, respectively, and the stiffness coefficient of the traction spring is in the range of 5N / mm-10N / mm.
7. The apparatus according to claim 5, characterized in that, The guide tube module is provided with a guide tube of a preset length at the connection point with the guide rail module. The guide tube is used to constrain the sliding direction of the traction rope.
8. The apparatus according to claim 1, characterized in that, The catheter module is provided with a predetermined number of reinforcing beams on its exterior, which are used to stabilize the catheter module.
9. The apparatus according to claim 1, characterized in that, The device also includes a tightening nut, which is fixedly connected to the conduit module and is used to connect the adaptive vibration damping device and the flexible rotating shaft that needs to suppress vibration.