CN111287916B - A Tuned Collision Inertia Mass Damping Device for Fan - Google Patents
A Tuned Collision Inertia Mass Damping Device for Fan Download PDFInfo
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- CN111287916B CN111287916B CN202010063874.7A CN202010063874A CN111287916B CN 111287916 B CN111287916 B CN 111287916B CN 202010063874 A CN202010063874 A CN 202010063874A CN 111287916 B CN111287916 B CN 111287916B
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- 238000013016 damping Methods 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 122
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- 230000009467 reduction Effects 0.000 abstract description 8
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- 230000000694 effects Effects 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 5
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- 238000012986 modification Methods 0.000 description 2
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- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/50—Maintenance or repair
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0296—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce noise emissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a tuned collision inerter mass damping device for a fan, which comprises a bearing mechanism, a damper, a mass block, a plurality of inerter mechanisms and a plurality of collision mechanisms, wherein the bearing mechanism is arranged on the upper part of the bearing mechanism; the bearing mechanism is arranged on the platform, the damper is arranged on the bearing mechanism, the upper part of the damper is connected with the lower part of the mass block, a piston rod of the damper is fixedly connected to the bearing mechanism, and the mass block is connected with the cabin wall of the fan generator cabin through a plurality of connecting mechanisms; the inertial volume mechanism and the collision mechanism are respectively arranged on the outer side of the mass block at intervals, one end of the inertial volume mechanism is fixedly connected with the outer wall of the mass block, and the other end of the inertial volume mechanism is respectively connected with the bulkhead of the fan generator room; and a collision gap is reserved between the collision mechanism and the outer wall of the mass block. The invention has the beneficial effects that: the invention combines the inertial volume mechanism and the collision mechanism, utilizes the inertial force, the inertial volume force, the collision force and the damping force generated by the coupling of the inertial volume mechanism and the collision mechanism to carry out structural vibration reduction, and reduces the working space of the mass block.
Description
Technical Field
The invention relates to a damper, in particular to a tuned collision inertia capacity mass damping device for a fan.
Technical Field
Wind energy is one of the energy sources which are disputed and developed by various countries at present as a pollution-free and renewable clean energy source, and the manufacturing and maintenance of the wind driven generator also have important research significance and value. Offshore single-pile wind generators are mainly subjected to loads such as wind, waves and the like, and under the combined action of the loads and environmental factors (such as soil effect), the wind generators can bear excessive vibration. In order to reduce the adverse effect of vibration on the generator, keep the normal operation of the system, maintain the good power transmission state and prolong the service life of the system, the damper is added in the cabin of the wind driven generator, and the aim of vibration reduction is achieved by using the control device.
At present, various types of dampers are applied to the vibration reduction of a fan, wherein passive control is widely used due to the fact that the technology is relatively mature and practical and reliable. The traditional Tuned Mass Damper (TMD) is used as a vibration damping control device with simple design and low cost, and can effectively reduce the vibration response of the wind driven generator. However, the traditional damper needs a certain amount of additional mass, and with the development of wind power generation technology, the size and the type of the wind power generator are gradually increased, and sometimes a significant mass needs to be added at the top end to achieve a satisfactory vibration reduction effect. However, the installation space in the fan generator is limited, and the large or heavy TMD cannot meet the design and installation requirements of the active generator.
Disclosure of Invention
The invention aims to provide a tuned collision inertia capacity mass damper for a fan, which is used for coupling a collision mechanism and an inertia capacity mechanism.
The technical scheme adopted by the invention is as follows: a tuned collision inerter mass damping device for a fan comprises a bearing mechanism, a damper, a mass block, a plurality of inerter mechanisms and a plurality of collision mechanisms; the bearing mechanism is arranged on the platform, the damper is arranged on the bearing mechanism, the upper part of the damper is connected with the lower part of the mass block, a piston rod of the damper is fixedly connected to the bearing mechanism, and the mass block is connected with the cabin wall of the fan generator cabin through a plurality of connecting mechanisms; the inertial volume mechanism and the collision mechanism are respectively arranged on the outer side of the mass block at intervals, one end of the inertial volume mechanism is fixedly connected with the outer wall of the mass block, and the other end of the inertial volume mechanism is respectively connected with the bulkhead of the fan generator room; and a collision gap is reserved between the collision mechanism and the outer wall of the mass block.
According to the scheme, the collision mechanism comprises a baffle plate arranged on the outer side of the mass block, and a gap is reserved between the mass block and the baffle plate; the lower end of the baffle is arranged on the bearing mechanism; the surface of the baffle plate on one side of the mass block is provided with a viscoelastic material.
According to the scheme, the lower end of the baffle is connected with the roller, the roller is arranged in the limiting clamping groove and can slide along the limiting clamping groove, and the limiting clamping groove is arranged on the bearing mechanism.
According to the scheme, the cross section of the mass block is cross-shaped; the baffle is equipped with four groups, and the four corners of branch locating quality piece.
According to the scheme, the bearing mechanism comprises a power mechanism and a turntable, the power mechanism is arranged on the platform, and the turntable is arranged at the upper part of the power mechanism and drives the turntable to rotate; the rotary table is provided with an auxiliary seat, and a piston rod of the damper is fixedly connected to the auxiliary seats at the two ends; the limiting clamping groove can be arranged on a turntable of the bearing mechanism.
According to the scheme, the bearing mechanism is additionally provided with a limiting guide rail, the bottom of the limiting guide rail is arranged on the turntable, and two ends of the limiting guide rail are limited and fixed through the auxiliary seats.
According to the scheme, an arc-shaped guide groove is formed in the limiting guide rail; the bottom of the mass block is supported by a plurality of supporting mechanisms, the upper ends of the supporting mechanisms are fixedly connected with the mass block, the supporting mechanisms are installed in a matched mode with the guide grooves and can slide or roll along the guide grooves, and particularly, the supporting structures can be guide wheels.
According to the scheme, the connecting mechanism is a spring.
According to the scheme, the inerter mechanism comprises an inerter, the inerter comprises a shell, a ball screw and a flywheel, the shell is hollow to form a stroke cavity of the ball screw, one end of the ball screw is connected with the mass block, and the other end of the ball screw extends into the stroke cavity; the ball screw is assembled through a bearing, one end face of the bearing is attached to the inner end face of the nut of the ball screw, and the other end face of the bearing is provided with a pre-tightening nut for pre-tightening; the bearing is arranged in the bearing seat, and the bearing seat is fixedly connected with the shell; the flywheel is fixedly connected with a nut of the ball screw, the nut is assembled on the screw of the ball screw, a ball is arranged in a screw pair formed by the nut and the screw, and the linear motion of the screw is converted into the rotary motion of the nut and the flywheel by the screw.
According to the scheme, a lead screw of the ball screw is provided with an end baffle, a first lifting lug is mounted on the end baffle, and the first lifting lug is connected with the mass block through a first connecting rod; the casing design is loudspeaker formula structure, and the small-bore end of casing is equipped with the second lug, and the second lug passes through the second connecting rod and links to each other with the bulkhead in fan generator room.
The invention has the beneficial effects that:
1. the invention combines an inertial volume mechanism and a collision mechanism, and utilizes the coupling inertial force, the inertial volume force, the collision force and the damping force of the inertial volume mechanism and the collision mechanism to carry out structural vibration reduction, and the method specifically comprises the following steps: the inertial container mechanism converts linear motion into high-speed rotary motion, so that the damping device generates apparent mass which is much larger than the actual physical mass of the damping device, and the mass of the mass block can be remarkably reduced while the inertial container mechanism has the advantages of a traditional TMD vibration damping structure; when the vibration distance is larger than the collision distance, the collision mechanism is added to effectively limit the working space of the mass block, and the energy is consumed by the collision between the mass block and the baffle; the two vibration damping modes are coupled: the inertial capacity mechanism enables the collision mechanism to be lighter, the addition of the apparent mass can increase collision energy consumption and reduce mass block displacement while not increasing the actual mass of the mass block, and the lighter the mass block is, the smaller the optimal collision interval is, and the smaller the working space of the mass block is; (2) the collision mechanism is added, so that the working space of the inertial volume mechanism is further reduced, and the robustness of the whole inertial volume mechanism can be effectively improved. The coupling of the two mechanisms ensures that the damping device has more working energy consumption modes while keeping the advantages of the traditional TMD, reduces the working space of the damping device and improves the applicability of the damping device; by adjusting collision interval and inertia-capacitance coefficient, the damping device is switched among the traditional TMD, TMDI and PTMDI systems: when the viscoelastic baffle moves to the edge of the clamping groove rail, namely the mass block cannot collide with the clamping groove rail, the invention can be regarded as a TMDI control system, and on the basis, when the inertia-capacitance coefficient is 0, the invention can be regarded as a traditional TMD.
2. The arc-shaped guide rail is designed, the mass block can automatically return after the vibration is finished, the mass block overcomes the gravity to do work when vibrating, the energy consumption can be increased, and the vibration reduction effect is improved.
Drawings
FIG. 1 is a front view of one embodiment of the present invention.
Fig. 2 is a top view of the present embodiment.
Fig. 3 is a schematic diagram of the ball screw inertial volume mechanism in the present embodiment.
Wherein: 1. a mass block; 2. a spring; 3. an inerter; 4. limiting a guide rail; 5. a roller; 6. a power mechanism; 7. a damper; 8. a turntable; 9. an auxiliary seat; 10. a connecting rod; 11. a baffle plate; 12. a viscoelastic material; 13. a piston rod; 14. a limiting clamping groove; 15. a flywheel; 16. a bearing; 17. a bearing seat; 18. a stroke chamber; 19. a second lifting lug; 20. a housing; 21. pre-tightening the nut; 22. a nut; 23. an end baffle; 24. a first lifting lug; 25. and a lead screw.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Fig. 1 and 2 show a tuned collision inerter mass damping device for a fan, which comprises a supporting mechanism, a damper 7, a mass block 1, a plurality of inerter mechanisms and a plurality of collision mechanisms; the bearing mechanism is arranged on the platform, the damper 7 is arranged on the bearing mechanism, the upper part of the damper 7 is connected with the lower part of the mass block 1, a piston rod 13 of the damper 7 is fixedly connected on the bearing mechanism, and the mass block 1 is connected with the cabin wall of the fan generator cabin through a plurality of connecting mechanisms; the inertial volume mechanism and the collision mechanism are respectively arranged at the outer side of the mass block 1 at intervals, one end of the inertial volume mechanism is fixedly connected with the outer wall of the mass block 1, and the other end of the inertial volume mechanism is respectively connected with the bulkhead of the fan generator room; and a collision gap is reserved between the collision mechanism and the outer wall of the mass block 1. In this embodiment, the damper 7 is an existing structure, and is not modified, and is not described herein again.
Preferably, the collision mechanism comprises a baffle plate 11 arranged outside the mass block 1, and the lower end of the baffle plate 11 is mounted on the supporting mechanism; the surface of the baffle 11 on one side of the mass 1 is provided with a viscoelastic material 12, and specifically, the viscoelastic material 12 is provided on the upper part of the baffle 11 which can contact with the mass 1.
Preferably, the cross section of the mass block 1 is cross-shaped; the baffle 11 is provided with four groups which are arranged at four corners of the mass block 1. In this embodiment, the baffle 11 is a rigid structure, or a steel plate; a gap is reserved between the mass block 1 and the baffle 11 and is not in direct contact with the gap, the lower end of the baffle 11 is connected with the roller 5, and the roller 5 is arranged in the limiting clamping groove 14 and can slide along the limiting clamping groove 14 so as to control the collision interval between the mass block 1 and the baffle 11; spacing draw-in groove 14 is seted up on bearing mechanism: when the vibration distance of the mass block 1 is less than the collision interval, the damping device can be approximately equivalent to a Tuned Mass Damper (TMDI) structure, and on the basis of the TMDI, when the inertance coefficient is 0, the damping device can be equivalent to a traditional TMD.
Preferably, the supporting mechanism comprises a power mechanism 6 and a turntable 8, the power mechanism 6 is arranged on the platform, and the turntable 8 is arranged at the upper part of the power mechanism 6 and drives the turntable 8 to rotate; an auxiliary seat 9 is arranged on the rotary table 8, and a piston rod 13 of the damper 7 is fixedly connected to the auxiliary seats 9 at the two ends; the limiting clamping groove 14 can be installed on the rotating disc 8 of the bearing mechanism.
Preferably, the supporting mechanism is additionally provided with a limiting guide rail 4, the bottom of the limiting guide rail 4 is arranged on the turntable 8, and two ends of the limiting guide rail are limited and fixed through an auxiliary seat 9; an arc-shaped guide groove is formed in the limiting guide rail 4; the bottom of the mass block 1 is supported by a plurality of supporting mechanisms, the upper ends of the supporting mechanisms are fixedly connected with the mass block 1, the supporting mechanisms are installed in a matched mode with the guide grooves and can slide or roll along the guide grooves, and particularly, the supporting structures can be guide wheels. In the embodiment, the number of the supporting mechanisms is four, and the four supporting mechanisms are symmetrically arranged at the bottom of the mass block 1 in a pairwise manner; correspondingly, the limit guide rail 4 is provided with a front guide groove and a rear guide groove.
Preferably, the connection mechanism is a spring 2.
In this embodiment, as shown in fig. 3, the inerter mechanism includes an inerter 3, the inerter 3 includes a housing 20, a ball screw and a flywheel 15, the housing 20 is hollow to form a stroke cavity 18 of the ball screw, one end of a screw 25 of the ball screw is connected to the mass block 1, and the other end of the screw 25 of the ball screw extends into the stroke cavity 18; the ball screw is assembled through a bearing 16, one end face of one side of the bearing 16 is attached to the inner end face of a nut 22 of the ball screw, and the other end face of the bearing 16 is provided with a pre-tightening nut 21 for pre-tightening; the bearing 16 is arranged in the bearing seat 17, and the bearing seat 17 is fixedly connected with the shell 20; the flywheel 15 is fixedly connected with a nut 22 of the ball screw, the nut 22 is assembled on a screw 25 of the ball screw, balls are arranged in a screw pair formed by the nut 22 and the screw 25, the screw 25 converts linear motion of the linear motion into rotary motion of the nut 22 and the flywheel 15, and a dustproof cover is arranged outside the stroke cavity 18. A lead screw 25 of the ball screw is provided with an end baffle 23 (which can be designed into a round shape), a first lifting lug 24 is arranged on the end baffle 23, and the first lifting lug 24 is connected with the mass block 1 through a connecting rod 10; the shell 20 is designed to be a horn-shaped structure, a second lifting lug 19 is arranged at the small-caliber end of the shell 20, and the second lifting lug 19 is connected with the bulkhead of the fan generator room through another connecting rod 10. The inertial container 3 in this embodiment is the prior art, and the structure thereof is not improved, which is not described herein.
The working principle of the invention is as follows:
when the fan normally works, the rotation direction of the fan blade changes along with the wind direction, and the power mechanism 6 drives the rotating disc 8 to rotate at the moment until the movement direction of the mass block 1 is consistent with the wind direction, so that the vibration reduction direction of the damping device is ensured to be consistent with the wind direction to the maximum extent, and the vibration reduction effect is optimal. When the fan is under the action of an external load, relative acceleration is generated between the inertial volume mechanism and the engine room, and the inertial volume mechanism works to generate inertial volume force. When equal and opposite forces are applied to the centers of the left lifting lug and the right lifting lug of the inertia container 3 along the axial direction, the first lifting lug 24 and the second lifting lug 19 do linear motion, the first lifting lug and the second lifting lug generate relative displacement, the nut 22 and the lead screw 25 of the ball screw convert the relative linear motion of the first lifting lug and the second lifting lug into the rotary motion of the nut 22, the nut 22 drives the flywheel 15 to rotate, and therefore the inertia of the flywheel 15 is encapsulated; the mass amplification effect of the inerter mechanism can improve the apparent mass of the control device and reduce the actual mass of the mass block 1, and the ball screw type inerter 3 can be as high as the actual flywheel 15 mass 103Several orders of magnitude. If the wind power is small, the amplitude of the mass block 1 is small, the mass block 1 does not collide with the baffle 11, namely the collision mechanism does not need to work, and the inertial container mechanism plays a mass amplification effect, and at the moment, the control device of the invention plays a vibration damping control effect through the mass block 1, the inertial container 3, the damper 7 and the spring 2. The limiting guide rail 4 enables the mass block 1 to have larger energy consumption compared with the traditional TMD when vibrating, and can automatically reset when the vibration is finished. When the wind power is large, the collision mechanism and the inertia capacity mechanism are put into operation at the same time, the newly increased collision force of the system consumes energy, the energy consumption capability can be adjusted by adjusting the collision rigidity of the baffle 11, and generally, the more rigid material consumes energy, the worse the energy capability is, but the better the limiting capability on the mass block 1 is.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the above-mentioned embodiments, or equivalent substitutions of some technical features, but any modifications, equivalents, improvements and the like within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010063874.7A CN111287916B (en) | 2020-01-20 | 2020-01-20 | A Tuned Collision Inertia Mass Damping Device for Fan |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010063874.7A CN111287916B (en) | 2020-01-20 | 2020-01-20 | A Tuned Collision Inertia Mass Damping Device for Fan |
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| CN111287916A CN111287916A (en) | 2020-06-16 |
| CN111287916B true CN111287916B (en) | 2021-01-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112032005B (en) * | 2020-09-04 | 2022-08-12 | 天津大学 | A fan with tuned mass damper |
| CN112227181B (en) * | 2020-10-20 | 2022-06-14 | 精易建工集团有限公司 | Shock absorption structure for bridge and use method thereof |
| CN113312713B (en) * | 2021-04-06 | 2023-05-02 | 华东交通大学 | Optimal parameter design method for tuned inertial mass damper |
| CN113529996A (en) * | 2021-06-17 | 2021-10-22 | 武汉理工大学 | Collision tuning viscous mass damping device |
| CN114662241B (en) * | 2022-04-02 | 2024-10-22 | 哈尔滨工业大学 | A unified design method for TMDI and TMD based on Kramers-Kronig relationship |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1718929A (en) * | 2005-07-24 | 2006-01-11 | 大连理工大学 | Two-way adjustable tuned mass damper |
| US7931438B2 (en) * | 2006-12-13 | 2011-04-26 | General Electric Company | Active tower damper |
| CN101302995B (en) * | 2008-05-21 | 2010-06-02 | 三一电气有限责任公司 | Tuned mass damper vibration reduction control device for fan |
| CN202833843U (en) * | 2012-10-08 | 2013-03-27 | 北京金风科创风电设备有限公司 | Vibration reduction system used for wind driven generator and wind driven generator |
| KR101437362B1 (en) * | 2013-01-07 | 2014-09-15 | 한국기계연구원 | Appratus for dissipating vibration energy |
| CN106762464B (en) * | 2016-12-30 | 2019-01-25 | 北京金风科创风电设备有限公司 | Device and control method for suppressing lateral vibration of enclosure structure and protecting swing parts |
| CN110778672A (en) * | 2019-11-13 | 2020-02-11 | 江苏科技大学 | Planetary Roller Screw Type Inertial Vessel and Its Inertia Coefficient Calculation Method |
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