CN116044954B - Bidirectional tuning corrugated liquid column damper and mounting method thereof - Google Patents
Bidirectional tuning corrugated liquid column damper and mounting method thereof Download PDFInfo
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- CN116044954B CN116044954B CN202310044058.5A CN202310044058A CN116044954B CN 116044954 B CN116044954 B CN 116044954B CN 202310044058 A CN202310044058 A CN 202310044058A CN 116044954 B CN116044954 B CN 116044954B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/027—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means comprising control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
- F16F7/09—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other in dampers of the cylinder-and-piston type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/30—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium
- F16F9/303—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium the damper being of the telescopic type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/446—Adjustment of valve bias or pre-stress
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/04—Friction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/10—Adhesion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
Abstract
A two-way tuning corrugated liquid column damper and an installation method thereof are provided, wherein the tuning corrugated liquid column damper is composed of a tuning corrugated liquid column part (1), an air pressure adjusting part (2), a barrel type friction part (3) and an accessory component (4); the two identical tuned corrugated liquid column dampers are arranged in a crisscross manner to form a bidirectional tuned corrugated liquid column damper; based on the traditional tuning liquid column damper, the tuning corrugated liquid column part replaces a container tube of the traditional tuning liquid column damper by a vertical corrugated tube (11) and a horizontal corrugated tube (12); the air pressure adjusting part (2) is positioned at the upper smooth pipe wall of the vertical corrugated pipe (11); the cylindrical friction part (3) is positioned in the inner wall of the upper end of the vertical corrugated pipe (11) and above the air pressure adjusting part (2). The head loss during the flow of the liquid in the pipe is increased through the corrugated design, so that the damping of the damper is increased, and the horizontal vibration of the structure is effectively reduced.
Description
Technical Field
The invention belongs to the technical field of vibration control devices of civil structures, and particularly relates to a bidirectional tuning corrugated liquid column damper technology suitable for vibration reduction of wind turbine towers.
Background
Wind energy is widely used as a clean and pollution-free renewable energy, and the markets of wind power towers and wind turbines are expanding. However, under the action of environmental excitation such as wind and earthquake, the wind driven generator tower generates excessive vibration, so that the accident of tower collapse is frequent, and therefore, the energy consumption and vibration reduction treatment method for the structure is paid attention to by wide civil engineering researchers.
Structural vibration control techniques are considered to be an effective means of mitigating structural seismic and wind vibration responses. The Tuned Liquid Column Damper (TLCD) proposed by Sakai et al belongs to passive control in the field of vibration control and is an economical and simple-structure vibration control device. TLCD is typically a U-shaped or V-shaped tank and improves the dynamic state of the structure by tuning the frequency of the liquid column in the tube to a frequency near or equal to the natural frequency of the structure and selecting a moderate liquid damping, then attaching to the structure, and then transferring some of the structure's motion energy to the liquid to cause the liquid column to vibrate. Compared with a Tuned Mass Damper (TMD), the Tuned Liquid Column Damper (TLCD) has the characteristics of economy, simplicity, easiness in implementation, low maintenance cost and good vibration reduction effect. However, the traditional TLCD can only control the vibration response of a structure in one direction, and adopts a single energy consumption mechanism, has limited vibration reduction frequency band and provides smaller additional damping. The development and development of the novel vibration damper based on the mixed energy consumption mechanism such as tuned liquid column damper, corrugated pipe, barrel type friction damper and the like and various vibration control directions reduces or avoids the adverse effects of the traditional energy dissipation vibration damper, and has important engineering practical significance.
Disclosure of Invention
The invention aims to provide a bidirectional tuning corrugated liquid column damper and an installation method thereof.
The invention relates to a bidirectional tuning corrugated liquid column damper and an installation method thereof, wherein the bidirectional tuning corrugated liquid column damper comprises a tuning corrugated liquid column part 1, an air pressure adjusting part 2, a barrel type friction part 3 and an accessory component 4; the two identical tuned corrugated liquid column dampers are arranged in a crisscross manner to form a bidirectional tuned corrugated liquid column damper; based on the traditional tuning liquid column damper, the tuning corrugated liquid column part replaces a container tube of the traditional tuning liquid column damper by a vertical corrugated tube 11 and a horizontal corrugated tube 12; the air pressure adjusting part 2 is positioned on the upper smooth pipe wall of the vertical corrugated pipe 11; the cylindrical friction portion 3 is located in the upper end inner wall of the vertical bellows 11 above the air pressure adjusting portion 2.
The invention relates to a mounting method of a bidirectional tuning corrugated liquid column damper, which comprises the following steps:
step (1): according to the size data of the tower drum of the controlled fan and the self-vibration frequency of the tower drum of the controlled fan, determining the lengths and the wall thicknesses of the vertical corrugated pipe 11 and the horizontal corrugated pipe 12 of the device, and manufacturing a tuned corrugated liquid column part, an air pressure adjusting part and a drum type friction part of the device by using nylon PA 66; a hole with a diameter of one third is reserved on the smooth pipe wall of the vertical corrugated pipe 11 of the tuning corrugated liquid column part; 13 equally-spaced small holes are reserved on the porous plate 14, and the porous plate 14 is fixed in the center of the inner wall of the horizontal corrugated pipe 12 by waterproof airtight glue;
step (2): the guide rod of the inner cylinder 34 extends into the outer sleeve through the hole at the top of the outer sleeve 33, viscous liquid 35 in the cavity is filled in the cavity of the outer sleeve 33, and the hole at the top of the outer sleeve and the guide rod of the inner cylinder 34 are sealed by epoxy resin adhesive, so that the tightness of the cavity in the outer sleeve 33 is ensured. One end of a return spring 31 of a cylinder type friction part in the selecting device is placed in a hole reserved in the top plate of an inner cylinder 34, and the other end of the spring is placed in a hole reserved in the upper top surface of a piston 32 and fixed by using an epoxy resin adhesive; the inner cylinder 34 is arranged in the reset spring 31, and the bottom plate of the outer sleeve 33 and the upper top surface of the piston 32 are connected by epoxy resin adhesive;
step (3): pouring viscous liquid 13 into the corrugated pipe, then placing the cylindrical friction part assembled in the step (2) into the vertical corrugated pipe 11, coaxially placing the cylindrical friction part so that the top plate of the inner cylinder 34 is flush with the top end of the vertical corrugated pipe 11, and finally connecting the top plate of the inner cylinder 34 and the inner wall of the vertical corrugated pipe 11 by using an epoxy resin adhesive; the air pressure adjusting part is put into a reserved hole on the smooth pipe wall of the vertical corrugated pipe 11 in the step (1), and then is put into a sealing rubber ring and is fixed by an epoxy resin adhesive; ensuring the tightness of the whole device;
step (4): a second connecting plate 42 and a third connecting plate 43 with fixing holes are arranged at the center point of the inner wall of the top of the tower, and the connecting plate at the top of the tower is welded and fixed according to the distance between the first connecting plate 41;
step (5): controlling the air pressure of the closed air column in the corrugated pipe by using an air pressure valve 24 in the air pressure adjusting part, so that the vibration frequency of the liquid column in the device is close to the natural frequency of the controlled fan;
step (6): the device is lifted to the top end of the tower cylinder of the controlled fan by using a cable, a high-strength bolt 44 firstly passes through a gasket 45, then sequentially passes through a hole 421 on a second connecting plate, a hole 411 on a first connecting plate and a hole 431 on a third connecting plate, finally a nut 46 is installed, the rest connecting plates are fixed according to the sequence, and the installation of the bidirectional tuning corrugated liquid column damper and the controlled fan is completed.
The invention has the beneficial effects that: the mixed energy consumption mechanism is adopted, and the energy consumption vibration reduction device has the characteristics of obvious energy consumption vibration reduction effect, vibration reduction frequency bandwidth and the like. The device has the advantages that the self-vibration frequency is easier to adjust than that of the traditional TLCD, and the adjustable and replaceable springs are adopted to increase the vibration-damping bandwidth, so that the device is applicable to buildings or structures with different self-vibration periods; the device is additionally provided with the friction part, and liquid oscillation drives the piston to reciprocate to realize friction energy consumption, so that the energy consumption capacity of the device is enhanced; the invention combines the advantages of tuned liquid column damper and friction damper, wherein the vertical and horizontal container pipes adopt adjustable ripple design, thereby increasing damping and enhancing energy consumption and vibration reduction effects of the structure; according to the invention, the real-time control of the vibration of the wind driven generator is realized by changing the air pressure in the corrugated pipe; the invention adopts a bidirectional cross structure to realize bidirectional vibration damping control on the fan tower.
Drawings
FIG. 1 is a schematic view of an apparatus for testing the present invention in which a device is installed in a tower; FIG. 2 is a three-dimensional view of the test device of the present invention; FIG. 3 is a front view of the test device of the present invention; FIG. 4 is a cross-sectional view of the test device of the present invention; FIG. 5 is a detailed view of the air pressure regulating portion of the present invention; FIG. 6 is a detailed view of a barrel friction portion; FIG. 7 is a detailed view of the connection of the device to the tower; fig. 8 is a detailed view of the connection plate. Reference numerals and corresponding names are: tuning corrugated liquid column part 1, vertical corrugated pipe 11, horizontal corrugated pipe 12, viscous liquid 13, porous plate 14, air pressure regulating part 2, valve head 21, valve neck 22, valve stem 23, air pressure valve 24, barrel friction part 3, return spring 31, piston 32, outer sleeve 33, inner barrel 34, viscous liquid 35 in cavity, first connecting plate 41, second connecting plate 42, third connecting plate 43, high-strength bolt 44, gasket 45, nut 46, hole 411 in first connecting plate, hole 421 in second connecting plate, hole 431 in third connecting plate.
Description of the embodiments
The invention relates to a bidirectional tuning corrugated liquid column damper and an installation method thereof, wherein the bidirectional tuning corrugated liquid column damper comprises a tuning corrugated liquid column part 1, an air pressure adjusting part 2, a barrel type friction part 3 and an accessory component 4; the two identical tuned corrugated liquid column dampers are arranged in a crisscross manner to form a bidirectional tuned corrugated liquid column damper; based on the traditional tuning liquid column damper, the tuning corrugated liquid column part replaces a container tube of the traditional tuning liquid column damper by a vertical corrugated tube 11 and a horizontal corrugated tube 12; the air pressure adjusting part 2 is positioned on the upper smooth pipe wall of the vertical corrugated pipe 11; the cylindrical friction portion 3 is located in the upper end inner wall of the vertical bellows 11 above the air pressure adjusting portion 2.
The bidirectional tuning corrugated liquid column damper comprises a tuning corrugated liquid column part 1, a plurality of liquid column dampers and a liquid column damper, wherein the tuning corrugated liquid column part 1 comprises 2 vertical corrugated pipes 11, 2 horizontal corrugated pipes 12, viscous liquid 13 and a porous plate 14, the vertical corrugated pipes 11 are vertically arranged above the horizontal corrugated pipes 12, and the pipe diameters of the vertical corrugated pipes 11 are the same as those of the horizontal corrugated pipes 12; the bottom of the vertical corrugated pipe 11 is respectively communicated with the left end and the right end of the horizontal corrugated pipe 12; viscous liquid 13 is contained in the vertical bellows 11, the horizontal bellows 12, and oscillates inside the bellows as the external structure vibrates; the porous plate 14 is fixed at the center of the horizontal bellows 12 with a waterproof airtight glue, and the area of the porous plate 14 is 95% of the cross-sectional area of the corresponding horizontal bellows 12, changing the flow rate of the viscous liquid 13 flowing therethrough.
The two-way tuning corrugated liquid column damper comprises an air valve head 21, an air valve neck 22, an air valve rod 23 and an air valve 24, wherein the air pressure adjusting part is positioned on the smooth pipe wall of the vertical corrugated pipe 11 and is communicated with the inside of the corrugated pipe; the air pressure adjusting part comprises a valve head part 21, a valve neck part 22 and a valve rod part 23 from front to back in sequence; the air pressure valve 24 is provided in the center of the valve head 21; because the vertical corrugated pipe 11 and the horizontal corrugated pipe 12 are closed container pipes, a closed air column exists above the viscous liquid 13 in the vertical corrugated pipe 11, the air pressure adjusting part controls the air pressure of the closed air column according to the gust size of the fan, and the self frequency of the adjusting device is close to the vibration frequency of the controlled fan.
The bidirectional tuning corrugated liquid column damper comprises a cylinder friction part 3, a cylinder type friction part and a damping part, wherein the cylinder friction part 3 comprises a reset spring 31, a piston 32, an outer sleeve 33, an inner cylinder 34 and intracavity viscous liquid 35, the reset spring 31 is arranged above the outer sleeve 33 and wraps the inner cylinder 34, the upper end of the reset spring is fixed in a hole reserved in the top plate of the inner cylinder 34, and the lower end of the reset spring is fixed in a hole reserved in the upper top surface of the piston 32; the diameter of the largest section of the piston 32, the outer sleeve 33 and the inner cylinder 34 is equal to the diameter of the inner wall of the vertical corrugated pipe 11; the upper top surface of the piston 32 is attached to the lower bottom surface of the outer sleeve 33 and is fixed by waterproof airtight glue; the guide rod of the inner cylinder 34 sequentially passes through the reset spring 31 and the reserved hole at the top of the outer sleeve 33 to extend into the cavity of the outer sleeve 33; the viscous liquid 35 is contained in the cavity inside the outer sleeve 33; when the device starts to work, the reset spring 31 and the piston 32 drive the outer sleeve 33 to move up and down, so that the guide rod in the inner cylinder 34 reciprocates in the cavity of the outer sleeve 33, viscous liquid in the cavity flows in the cavity of the outer sleeve 33 through the hole at the head of the guide rod of the inner cylinder 34, viscous damping is provided, a cylinder type friction part is formed, friction energy consumption is realized, and multiple energy consumption of the damper is realized.
The above-mentioned bidirectional tuning corrugated liquid column damper, the accessory member 4 comprises a first connecting plate 41, a second connecting plate 42, a third connecting plate 43, a high-strength bolt 44, a gasket 45 and a nut 46, wherein the first connecting plate 41, the second connecting plate 42 and the third connecting plate 43 are all integrally prefabricated so as to facilitate the integral assembly of the structure.
The bidirectional tuning corrugated liquid column damper is characterized in that the mass of the bidirectional tuning corrugated liquid column damper is 1% -5% of the mass of the controlled wind driven generator.
The invention relates to a mounting method of a bidirectional tuning corrugated liquid column damper, which comprises the following steps:
step (1): according to the size data of the tower drum of the controlled fan and the self-vibration frequency of the tower drum of the controlled fan, determining the lengths and the wall thicknesses of the vertical corrugated pipe 11 and the horizontal corrugated pipe 12 of the device, and manufacturing a tuned corrugated liquid column part, an air pressure adjusting part and a drum type friction part of the device by using nylon PA 66; a hole with a diameter of one third is reserved on the smooth pipe wall of the vertical corrugated pipe 11 of the tuning corrugated liquid column part; 13 equally-spaced small holes are reserved on the porous plate 14, and the porous plate 14 is fixed in the center of the inner wall of the horizontal corrugated pipe 12 by waterproof airtight glue;
step (2): the guide rod of the inner cylinder 34 extends into the outer sleeve through the hole at the top of the outer sleeve 33, viscous liquid 35 in the cavity is filled in the cavity of the outer sleeve 33, and the hole at the top of the outer sleeve and the guide rod of the inner cylinder 34 are sealed by epoxy resin adhesive, so that the tightness of the cavity in the outer sleeve 33 is ensured. One end of a return spring 31 of a cylinder type friction part in the selecting device is placed in a hole reserved in the top plate of an inner cylinder 34, and the other end of the spring is placed in a hole reserved in the upper top surface of a piston 32 and fixed by using an epoxy resin adhesive; the inner cylinder 34 is arranged in the reset spring 31, and the bottom plate of the outer sleeve 33 and the upper top surface of the piston 32 are connected by epoxy resin adhesive;
step (3): pouring viscous liquid 13 into the corrugated pipe, then placing the cylindrical friction part assembled in the step (2) into the vertical corrugated pipe 11, coaxially placing the cylindrical friction part so that the top plate of the inner cylinder 34 is flush with the top end of the vertical corrugated pipe 11, and finally connecting the top plate of the inner cylinder 34 and the inner wall of the vertical corrugated pipe 11 by using an epoxy resin adhesive; the air pressure adjusting part is put into a reserved hole on the smooth pipe wall of the vertical corrugated pipe 11 in the step (1), and then is put into a sealing rubber ring and is fixed by an epoxy resin adhesive; ensuring the tightness of the whole device;
step (4): a second connecting plate 42 and a third connecting plate 43 with fixing holes are arranged at the center point of the inner wall of the top of the tower, and the connecting plate at the top of the tower is welded and fixed according to the distance between the first connecting plate 41;
step (5): controlling the air pressure of the closed air column in the corrugated pipe by using an air pressure valve 24 in the air pressure adjusting part, so that the vibration frequency of the liquid column in the device is close to the natural frequency of the controlled fan;
step (6): the device is lifted to the top end of the tower cylinder of the controlled fan by using a cable, a high-strength bolt 44 firstly passes through a gasket 45, then sequentially passes through a hole 421 on a second connecting plate, a hole 411 on a first connecting plate and a hole 431 on a third connecting plate, finally a nut 46 is installed, the rest connecting plates are fixed according to the sequence, and the installation of the bidirectional tuning corrugated liquid column damper and the controlled fan is completed.
The invention will now be further described with reference to the drawings and specific examples, which are given for the purpose of illustration only and are not intended to limit the invention. Modifications, equivalents, and improvements within the spirit of the invention are intended to be within the scope of the invention.
As shown in fig. 1 to 8, the structure of the bidirectional tuned corrugated liquid column damper of the present invention comprises a tuned corrugated liquid column part 1 composed of a vertical corrugated pipe 11, a horizontal corrugated pipe 12, a viscous liquid 13 and a porous plate 14; an air pressure adjusting part 2 composed of a valve head 21, a valve neck 22, a valve stem 23, and an air pressure valve 24; a cylinder friction part 3 which is connected with the return spring 31 and the piston 32 and is wrapped by an inner cylinder 34 wrapped by an outer sleeve 33 containing a viscous liquid 35 in a cavity; the accessory member 4 is composed of a first connecting plate 41, a second connecting plate 42, a third connecting plate 43, a high-strength bolt 44, a gasket 45 and a nut 46.
As shown in fig. 3 and 4, the vertical bellows 11 and the horizontal bellows 12 accommodate all energy consuming substances. The surfaces of the vertical corrugated pipe 11 and the horizontal corrugated pipe 12 are designed by using corrugations, and the corrugations consist of a circular ring shell, a flat cone shell and a circular ring plate. While allowing the viscous liquid 13 to provide more additional damping as it oscillates within the vertical and horizontal bellows 11, 12, increasing the damping efficiency.
As shown in fig. 3 and 4, there are four vertical bellows 11, two horizontal bellows 12, and bottom ends of the two vertical bellows 11 are respectively communicated with two ends of the horizontal bellows 12.
As shown in fig. 3 and 4, the cross sections of the vertical corrugated pipe 11 and the horizontal corrugated pipe 12 are circular, and the included angle of the horizontal corrugated pipe is equal to 90 °.
As shown in fig. 3 and 4, two perforated plates 14 are provided and placed at the center of the horizontal bellows 12.
As shown in fig. 5, the damper bellows is sealed, a closed air column exists at the upper part of the viscous liquid, the air column pressure in the tube is controlled by an air pressure valve 24 arranged on the valve head 21, and the vibration of the wind turbine structure under different working conditions is dealt with through the air pressure change.
As shown in fig. 6, the return spring 31 provides a restoring force to enable the reciprocating motion of the piston 32, the outer sleeve 33 and the inner cylinder 34. The parameters (number, stiffness, length) of the return spring 31 can be adjusted to meet the performance requirements of the building or structure with different self-vibration periods.
As shown in fig. 6, the friction part is composed of two parts, one part is an outer sleeve 33 connected with the top of the piston 32, the other part is an inner cylinder 34 fixedly connected with the top plate of the vertical container tube, the diameter of the outer sleeve 33 is slightly larger than that of the inner cylinder 34, the contact surfaces of the two parts are pretreated, friction powder is sprayed, and the friction energy consumption of the outer sleeve 33 and the inner cylinder 34 is realized through the up-and-down movement of the piston 32.
As shown in fig. 7, the high-strength bolt 44 passes through the spacer 45 first, then passes through the hole 421 on the second connecting plate, the hole 411 on the first connecting plate and the hole 431 on the third connecting plate in sequence, and finally installs the nut 46, thereby completing the connection between the tower and the bidirectional tuning corrugated liquid column damper.
As shown in the figure, the method for installing the bidirectional tuning corrugated liquid column damper comprises the following steps:
(1): according to the size data of the tower drum of the controlled fan and the self-vibration frequency of the tower drum of the controlled fan, the lengths and the wall thicknesses of the vertical corrugated pipe 11 and the horizontal corrugated pipe 12 of the device are determined, and a tuned corrugated liquid column part, an air pressure adjusting part and a drum type friction part of the device are manufactured by nylon (PA 66). And a hole with a diameter of one third is reserved on the smooth pipe wall of the vertical corrugated pipe 11 of the tuning corrugated liquid column part. 13 equally-spaced small holes are reserved on the porous plate 14, and the porous plate 14 is fixed in the center of the inner wall of the horizontal corrugated pipe 12 by waterproof airtight glue;
(2): the guide rod of the inner cylinder 34 extends into the outer sleeve through the hole at the top of the outer sleeve 33, viscous liquid 35 (methyl silicone oil is adopted in the patent) is filled in the cavity of the outer sleeve 33, and the hole at the top of the outer sleeve and the guide rod of the inner cylinder 34 are sealed by epoxy resin adhesive, so that the tightness of the cavity inside the outer sleeve 33 is ensured. One end of the return spring 31 of the barrel friction part of the selection device is placed in a hole reserved in the top plate of the inner barrel 34, and the other end of the spring is placed in a hole reserved in the upper top surface of the piston 32 and fixed by epoxy resin adhesive. The inner cylinder 34 is placed inside the return spring 31 and the bottom plate of the outer sleeve 33 and the upper top surface of the piston 32 are connected by epoxy adhesive.
(3): into the bellows is poured a viscous liquid 13 (methyl silicone oil is used in this patent). And (3) placing the assembled barrel type friction part in the step (2) into the vertical corrugated pipe 11, coaxially placing the barrel type friction part so that the top plate of the inner barrel 34 is flush with the top end of the vertical corrugated pipe 11, and finally connecting the top plate of the inner barrel 34 and the inner wall of the vertical corrugated pipe 11 by using an epoxy resin adhesive. And (3) placing the air pressure adjusting part into the reserved hole on the smooth pipe wall of the vertical corrugated pipe 11 in the step (1), then placing the sealing rubber ring, and fixing the sealing rubber ring by using an epoxy resin adhesive. Ensuring the tightness of the device as a whole.
(4): and a second connecting plate 42 and a third connecting plate 43 with fixing holes are arranged at the center point of the inner wall of the top of the tower, and the connecting plate at the top of the tower is welded and fixed according to the distance between the first connecting plate 41.
(5): the air pressure valve 24 in the air pressure adjusting part is used for controlling the air pressure of the closed air column in the corrugated pipe, so that the vibration frequency of the liquid column in the device is close to the natural frequency of the controlled fan.
(6): and lifting the device to the top end of the tower cylinder of the controlled fan by using a cable. The high-strength bolts 44 pass through the gaskets 45 first, then pass through the holes 421 on the second connecting plate, the holes 411 on the first connecting plate and the holes 431 on the third connecting plate in sequence, and finally the nuts 46 are installed, so that the connection between the tower and the bidirectional tuning corrugated liquid column damper is completed.
The working principle of the invention is mainly as follows: the bidirectional tuning corrugated liquid column damper consists of tuning corrugated liquid column part, air pressure regulating part, cylinder friction part and tower connecting part. The self-vibration period of liquid in the corrugated pipe can be changed by adjusting the length of the horizontal corrugated pipe and the height of the water head of the vertical corrugated pipe. Because the traditional tuned liquid damper adopts a single energy consumption mechanism and has limited vibration reduction frequency band, the provided additional damping is smaller. A corrugated design is used for the vessel tube surface. The corrugated structure makes the liquid head loss in the damper larger, and increases the additional damping generated during the oscillation of the damper, thereby achieving the effect of improving the vibration reduction efficiency of the damper. The upper end of the vertical corrugated pipe adopts a cylinder friction part formed by a spring and a sleeve, viscous liquid or fine particles are filled in the cavity, and the piston is driven to reciprocate by liquid oscillation to realize friction energy consumption. In order to overcome the limitation that the traditional Tuned Liquid Column Damper (TLCD) can only control the vibration response of a structure in one direction, the invention provides the bidirectional tuned corrugated liquid column damper, and the effect of horizontal bidirectional vibration reduction and energy consumption of a tower structure is realized.
Claims (7)
1. A two-way tuning ripple liquid column damper which characterized in that: the tuning corrugated liquid column part (1), the air pressure adjusting part (2), the barrel type friction part (3) and the accessory component (4) form a tuning corrugated liquid column damper; two identical tuned corrugated liquid column dampers are arranged in a crisscross manner to form a bidirectional tuned corrugated liquid column damper; based on the traditional tuning liquid column damper, the tuning corrugated liquid column part replaces a container tube of the traditional tuning liquid column damper by a vertical corrugated tube (11) and a horizontal corrugated tube (12); the air pressure adjusting part (2) is positioned at the upper smooth pipe wall of the vertical corrugated pipe (11); the cylindrical friction part (3) is positioned in the inner wall of the upper end of the vertical corrugated pipe (11) and above the air pressure adjusting part (2).
2. The bidirectional tuning corrugated liquid column damper according to claim 1, wherein the tuning corrugated liquid column part (1) comprises vertical corrugated pipes (11), horizontal corrugated pipes (12), viscous liquid (13) and porous plates (14), wherein the number of the vertical corrugated pipes (11) is 2, the vertical corrugated pipes are vertically arranged above the horizontal corrugated pipes (12), and the pipe diameters of the vertical corrugated pipes (11) are the same as those of the horizontal corrugated pipes (12); the bottom of the vertical corrugated pipe (11) is respectively communicated with the left end and the right end of the horizontal corrugated pipe (12); viscous liquid (13) is contained in the vertical corrugated pipe (11) and the horizontal corrugated pipe (12), and oscillates in the corrugated pipe along with the vibration of an external structure; the porous plate (14) is fixed at the center of the horizontal corrugated pipe (12) by waterproof airtight glue, and the area of the porous plate (14) is 95% of the cross-sectional area of the corresponding horizontal corrugated pipe (12), so that the flow speed of viscous liquid (13) is changed when the viscous liquid flows through.
3. The bidirectional tuned corrugated liquid column damper according to claim 2, characterized in that the air pressure adjusting part (2) comprises an air valve head (21), an air valve neck (22), an air valve stem (23) and an air pressure valve (24), is positioned on the smooth pipe wall of the vertical corrugated pipe (11) and is communicated with the inside of the vertical corrugated pipe (11); the air pressure adjusting part is sequentially provided with a valve head part (21), a valve neck part (22) and a valve rod part (23) from front to back; the air pressure valve (24) is arranged in the center of the valve head (21); because the vertical corrugated pipe (11) and the horizontal corrugated pipe (12) are closed container pipes, a closed air column exists above the viscous liquid (13) in the vertical corrugated pipe (11), the air pressure adjusting part controls the air pressure of the closed air column according to the gust size of the fan, and the self frequency of the adjusting device is close to the vibration frequency of the controlled fan.
4. A bidirectional tuned corrugated liquid column damper according to claim 3, characterized in that the cylindrical friction part (3) comprises a return spring (31), a piston (32), an outer sleeve (33), an inner cylinder (34) and viscous liquid (35) in a cavity, wherein the return spring (31) is arranged above the piston (32) and wraps the inner cylinder (34), the upper end of the return spring is fixed in a hole reserved in a top plate of the inner cylinder (34), and the lower end of the return spring is fixed in a hole reserved in the upper top surface of the piston (32); the diameters of the maximum sections of the piston (32), the outer sleeve (33) and the inner cylinder (34) are equal to the diameter of the inner wall of the vertical corrugated pipe (11); the upper top surface of the piston (32) is attached to the lower bottom surface of the outer sleeve (33) and is fixed by waterproof airtight glue; the guide rod of the inner cylinder (34) sequentially passes through the reset spring (31) and the reserved hole at the top of the outer sleeve (33) to extend into the cavity of the outer sleeve (33); the viscous liquid (35) in the cavity is contained in the cavity inside the outer sleeve (33); when the device starts to work, the reset spring (31) and the piston (32) drive the outer sleeve (33) to move up and down, so that the guide rod in the inner cylinder (34) reciprocates in the cavity of the outer sleeve (33), viscous liquid in the cavity flows in the cavity of the outer sleeve (33) through the hole at the head of the guide rod of the inner cylinder (34), viscous damping is provided, a cylinder type friction part is formed, friction energy consumption is realized, and multiple energy consumption of the damper is realized.
5. The bidirectional tuning corrugated liquid column damper according to claim 4, wherein the accessory component (4) comprises a first connecting plate (41), a second connecting plate (42), a third connecting plate (43), a high-strength bolt (44), a gasket (45), a nut (46) and a sealing rubber ring, and the first connecting plate (41), the second connecting plate (42) and the third connecting plate (43) are integrally prefabricated so as to facilitate the integral assembly of the structure; the center point of the inner wall of the top of the tower barrel is provided with a second connecting plate (42) and a third connecting plate (43) with fixing holes, and the upper end part of the top plate of the inner barrel (34) is provided with a first connecting plate (41).
6. The bi-directional tuned corrugated liquid column damper of claim 1, wherein the mass of the bi-directional tuned corrugated liquid column damper is 1% -5% of the mass of the controlled wind driven generator.
7. A method of installing a bi-directionally tuned wave liquid column damper as claimed in claim 5, comprising the steps of:
step (1): according to the size data of the tower drum of the controlled fan and the self-vibration frequency of the tower drum of the controlled fan, the lengths and the wall thicknesses of a vertical corrugated pipe (11) and a horizontal corrugated pipe (12) of the device are determined, and a tuned corrugated liquid column part, an air pressure adjusting part and a drum type friction part of the device are manufactured by nylon (PA 66); holes with a diameter of one third of the pipe diameter are reserved on the smooth pipe wall of the vertical corrugated pipe (11) of the tuning corrugated liquid column part; 13 holes with equal distances and equal diameters are reserved on the porous plate (14), and the porous plate (14) is fixed in the center of the inner wall of the horizontal corrugated pipe (12) by waterproof airtight glue;
step (2): the guide rod of the inner cylinder (34) extends into the outer sleeve through the hole at the top of the outer sleeve (33), viscous liquid (35) in the cavity is filled in the cavity in the inner cavity of the outer sleeve (33), and the hole between the hole at the top of the outer sleeve and the guide rod of the inner cylinder 34 is sealed by epoxy resin adhesive, so that the tightness of the cavity in the outer sleeve (33) is ensured; one end of a return spring (31) of a cylinder type friction part in the selecting device is placed in a hole reserved on the top plate of an inner cylinder (34), and the other end of the spring is placed in a hole reserved on the upper top surface of a piston (32) and fixed by using an epoxy resin adhesive; the outer sleeve (33) and the inner cylinder (34) are placed in the reset spring (31), and the bottom plate of the outer sleeve (33) and the upper top surface of the piston (32) are connected by epoxy resin adhesive;
step (3): pouring viscous liquid (13) into the corrugated pipe, then placing the cylindrical friction part assembled in the step (2) into the vertical corrugated pipe (11), coaxially placing the cylindrical friction part so that the top plate of the inner cylinder (34) is flush with the top end of the vertical corrugated pipe (11), and finally connecting the top plate of the inner cylinder (34) and the inner wall of the vertical corrugated pipe (11) by using epoxy resin adhesive; the air pressure adjusting part is placed in a reserved hole on the smooth pipe wall of the vertical corrugated pipe (11) in the step (1), then a sealing rubber ring is placed, and the sealing rubber ring is fixed by an epoxy resin adhesive, so that the integral tightness of the device is ensured;
step (4): a second connecting plate (42) and a third connecting plate (43) with fixing holes are arranged at the center point of the inner wall of the top of the tower barrel, and the second connecting plate (42) and the third connecting plate (43) are welded and fixed in sequence according to the distance between the first connecting plates (41);
step (5): controlling the air pressure of the closed air column in the corrugated pipe by using an air pressure valve (24) in the air pressure adjusting part, so that the vibration frequency of the liquid column in the device is close to the natural frequency of the controlled fan;
step (6): the device is lifted to the top end of a tower cylinder of the controlled fan by using a cable, a high-strength bolt (44) firstly passes through a gasket (45), then sequentially passes through a hole (421) on a second connecting plate, a hole (411) on a first connecting plate and a hole (431) on a third connecting plate, finally a nut (46) is installed, and the remaining connecting plates are fixed according to the sequence, so that the installation of the bidirectional tuning corrugated liquid column damper and the controlled fan is completed.
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| CN116044954A (en) | 2023-05-02 |
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