TW201900986A - Vibration-reducing and liquefaction-resisting foundation for shore-mounted wind turbine and offshore wind turbine with which the vibration reduction unit is not eccentrically vibrated thereby preventing vibration and improving service life - Google Patents

Abstract

The present invention relates to a vibration-reducing and liquefaction-resisting foundation for shore-mounted wind turbines and offshore wind turbines, which are provided to receive machine bodies of shore-mounted wind turbines or offshore wind turbines to dispose thereon and includes a balance unit, an anti-liquefaction unit, a vibration buffering unit and a vibration reduction unit arranged in sequence from bottom to top. The anti-liquefaction unit extends 20 meters or more into the ground or the seabed surface. The weight of the vibration reduction unit is greater than 10 times of the weight of the machine body, so as to reduce the vibration transferred downwardly. The weight of the anti-liquefaction unit is greater than 20 times of the weight of the machine body, so as to prevent liquefaction and resist lateral inertial forces during an earthquake. Furthermore, the center of gravity of the shore-mounted or offshore wind turbine is at the same gravity reference plumb line as the center of gravity of the vibration reduction unit, so that the vibration reduction unit is not eccentrically vibrated thereby preventing vibration and improving the service life and the power generation performance.

Description

Shore-mounted fan and offshore fan damping and liquefaction foundation

The invention relates to a vibration damping foundation, in particular to a vibration damping foundation applicable to a shore fan or an offshore fan.

In order to make good use of wind resources, wind turbines will be installed at the coast, and wind turbines will be used to convert wind power into electric energy. If the wind turbine is set at a water depth of 5 meters or less, it is a shore-mounted wind turbine. If the wind turbine is set at a water depth of 5 to 20 meters, it belongs to Offshore wind turbines use more space than offshore wind turbines, and the distance between offshore wind turbines and shore is greater than the distance between shore wind turbines and shores, which can reduce the impact of electromagnetic waves on the public.

In the above, the foundation of the offshore fan and the offshore fan is set on the seabed and is in contact with the saturated sand of the seabed, while the shore fan and the offshore fan generate chatter vibration during operation, or the wave beats to generate a frequency attack. Vibration, or earthquake vibration, easily cause liquefaction and hollowing out, which makes the foundation lose its confinement, causing the body of the shore fan or offshore fan to be easily eccentric, resulting in a decrease in power generation efficiency and shortened service life of the shore or offshore fan.

The main object of the present invention is to provide a foundation for damping and anti-liquefaction of a shore-mounted fan and an offshore fan, thereby improving the current situation that the foundation of the shore-mounted fan and the offshore fan cannot be prevented from vibration, resulting in eccentricity, reduced power generation efficiency and shortened life. .

In order to achieve the foregoing purpose, the invention relates to a shore-mounted fan and an offshore fan, which are provided with a ground-mounted fan or an offshore fan, and the shore-mounted fan and the offshore fan are damped and liquefied. The foundation comprises: a balancing unit comprising a plurality of spaced apart balanced piles; a liquefaction unit attached to the balancing unit and made of reinforced concrete, and the liquefaction preventing unit extending into the ground or seabed surface 20 Above the metric; a damper unit is disposed in the liquefaction prevention unit, the damper unit includes a plurality of spaced apart vibration-damping piles, and the vibration-damping piles protrude from the top surface of the liquefaction unit; a damper unit is disposed on the damper unit and is made of reinforced concrete, and the body is disposed on a top surface of the damper unit; wherein the weight of the damper unit is greater than 10 of the weight of the body The weight of the anti-liquefaction unit is greater than 20 times the weight of the body, and the center of gravity of the shore or offshore fan is on the same gravity vertical reference line as the center of gravity of the damping unit.

In the above, the weight of the vibration damping unit is greater than 10 times the weight of the body, so the vibration damping unit is hard to be driven by the vibration of the upper body or cause resonance, so that the vibration damping unit can effectively reduce the lower body transmission. Vibration, and the anti-liquefaction unit extends 20 meters or more above the ground or seabed surface, and the weight of the anti-liquefaction unit is greater than 20 times the weight of the body, which can prevent the seabed from liquefying and can resist the lateral direction during an earthquake. The inertia force, combined with the balanced foundation pile under the anti-liquefaction unit, allows the anti-liquefaction unit to not be displaced. The vibration-damping pile of the vibration-damping unit can buffer vibration and dissipate energy to improve eccentric vibration, thereby improving service life and improving Power generation efficiency of shore-mounted or offshore fans.

Referring to FIG. 1 and FIG. 2, a preferred embodiment of the vibration damping and liquefaction foundation of the shore fan and the offshore fan of the present invention is provided, and the body of the shore fan 50a or the offshore fan 50b is disposed thereon, and the shore is The damping and anti-liquefaction foundation of the fan and the offshore fan comprises a balancing unit 10, a liquefaction prevention unit 20, a vibration absorbing unit 30 and a damping unit 40.

The balance unit 10 is disposed under the ground 60 when the shore fan 50a is provided. The balance unit 10 is disposed under the seabed surface 70 when the offshore fan 50b is provided. The balance unit 10 includes a plurality of intervals. Balanced piles 11.

The anti-liquefaction unit 20 is disposed on the balance unit 10 and is made of reinforced concrete, and when the shore fan 50a is provided, the anti-liquefaction unit 20 extends above the ground 6020 meters, and provides the offshore fan 50b. When installed, the anti-liquefaction unit 20 extends into the seabed surface by more than 7020 meters.

The damper unit 30 is provided in the liquefaction prevention unit 20, and the damper unit 40 includes a plurality of vibration-damping piles 31 arranged at intervals, and the vibration-damping piles 31 project from the top surface of the liquefaction prevention unit 20.

The vibration damping unit 40 is disposed on the vibration damping unit 30 and is made of reinforced concrete. The body is disposed on the top surface of the vibration damping unit 40. As shown in FIG. 1, when the shore fan 50a is provided, The damping unit 40 is located above the ground 60, and the distance between the bottom surface of the damping unit 40 and the ground 60 is 2 meters to 3 meters. As shown in FIG. 2, when the offshore fan 50b is provided, the reduction is performed. The vibration unit 40 is located above the full tide sea surface 80, and the distance between the bottom surface of the vibration damping unit 40 and the full tide sea surface 80 is 2 meters to 3 meters.

In the above, the weight of the damping unit 40 is greater than 10 times the weight of the body, and the weight of the anti-liquefaction unit 20 is greater than 20 times the weight of the body, wherein the weight of the damping unit 40 can be equal to 10 times the weight of the body, the weight of the anti-liquefaction unit 20 may be equal to 20 times the weight of the body, and the center of gravity of the shore fan 50a or the offshore fan 50b is located at the same gravity as the center of gravity of the damping unit 40. On the reference line, the body has a support column 51, and a blade 52 is disposed above the support column 51. The balance pile 11 protrudes from the bottom surface of the anti-liquefaction unit 20, which is equal to The length of the support column 51.

As shown in FIG. 2, when the offshore fan 50b is installed, the balancing unit 10 and the anti-liquefaction unit 20 of the shore-mounted fan and the offshore fan damping and liquefaction-resistant foundation are disposed under the seabed surface 70, and the damping unit 40 The body arrangement of the offshore fan 50b is provided, and the vibration-damping pile 31 of the vibration-damping unit 30 can be adjusted in length according to the depth of the seabed, so that the bottom surface of the vibration-damping unit 40 can be higher than the full-surface sea surface 802 meters to 3 The meter can prevent the vibration damping unit 40 from being repeatedly impacted when the wave height is high, and the additional vibration of the vibration damping unit 40 caused by the wave beat is reduced.

In addition, the vibration damping effects of the shore-mounted fan and the offshore fan damping and liquefaction base are respectively described as follows: 1. The center of gravity of the shore fan 50a or the offshore fan 50b is located at the same gravity vertical reference as the center of gravity of the damping unit 40. On the line, when the blade 52 of the shore fan 50a or the offshore fan 50b is rotated by the wind and generates electricity, the vibration generated when the shore fan 50a or the offshore fan 50b is operated is transmitted downward to the vibration damping unit 40. At this time, the damper unit 40 is prevented from generating eccentric vibration. 2. The weight of the vibration damping unit 40 is greater than 10 times the weight of the body of the shore fan 50a or the offshore fan 50b, that is, when the weight of the body of the shore fan 50a or the offshore fan 50b is W, the vibration damping unit 40 The weight of the damper unit 40 is hard to be driven by the vibration of the body or cause resonance, so the damper unit 40 can reduce the vibration transmitted from the shore fan 50a or the offshore fan 50b. 3. The saturated sand contacted by the shore-mounted fan and the offshore fan vibration-damping and liquefaction-based foundation senses the vibration of the shore-mounted fan 50a or the offshore fan 50b, and generates liquefaction, which is larger or smaller, and the vibration-damping unit 40 and the shore The center of gravity of the fan 50a or the offshore fan 50b may be deviated and unstable, causing eccentric vibration, and the vibration damping base 40 is provided below the vibration damping unit 40, and the vibration damping pile 31 provides sufficient shear resistance, and It can buffer micro-vibration and achieve energy dissipation, effectively reducing eccentric vibration. 4. The geology of seismic liquefaction is within 20 meters underground, and the anti-liquefaction unit 20 having a depth of 20 meters and a weight of more than 20 W is provided below the vibration-damping pile 31, which can effectively prevent liquefaction. 5. If the earthquake causes the shore fan 50a, the offshore fan 50b, the vibration damping unit 40 and the vibration damping unit 30 to vibrate laterally, and the lateral force of the lateral vibration acts on the liquefaction prevention unit 20, the liquefaction prevention unit The weight of 20 is greater than 20W, so that the lateral inertia force of the 11W weight provided by the fan and the vibration damping unit 40 can be blocked, and because the balance pile 11 is disposed below the anti-liquefaction unit 20, the shore fan 50a can be prevented from passing through the balance pile 11. The inertial force of the offshore fan 50b, the damper unit 40 and the damper unit 30 displaces the liquefaction prevention unit 20, so that the arrangement of the balance unit 10 prevents the liquefaction prevention unit 20 from ending, and stability can be improved. 6. When the offshore fan 50b is provided, the vibration-damping foundation pile 31 of the vibration-damping unit 30 is 2 to 3 meters above the full-surface sea surface 80, and the shock-absorbing unit 40 is caused to avoid the repeated impact of the normal wave. Extra vibration. 7. When the offshore fan 50b is provided, the vibration-damping pile 31 allows the sea current to pass, and the passing current causes a slight vibration of the vibration-damping pile 31, and the liquefaction unit 20 can absorb the micro-vibration and prevent the seabed from liquefying. .

In summary, the shore-mounted fan and the offshore fan reduce vibration and liquefaction base using the vibration-damping unit 40 and the vibration-damping unit 30 to reduce the vibration generated when the shore fan 50a and the offshore fan 50b are operated, and the anti-liquefaction unit 20 can prevent liquefaction, and can resist the lateral inertial force during earthquakes, and effectively prevent eccentric vibration, and the vibration-damping pile 31 can also absorb the vibration caused by the impact of the waves, so the shore-mounted fan and the offshore fan are damped against liquefaction. It can effectively prevent vibration and improve eccentric vibration, and improve the service life of the shore fan 50a or the offshore fan 50b, maintain the long-term operating power of the shore fan 50a or the offshore fan 50b, and improve the power generation efficiency.

10‧‧‧Balance unit

11‧‧‧Balance pile

20‧‧‧Anti-liquefaction unit

30‧‧‧vibration unit

31‧‧‧Vibration piles

40‧‧‧damping unit

50a‧‧‧shore fan

50b‧‧‧ Offshore wind turbine

51‧‧‧Support column

52‧‧‧ fan leaves

60‧‧‧ Ground

70‧‧‧ seabed surface

80‧‧‧ full tide sea surface

Fig. 1 is a schematic view showing the arrangement of a shore-mounted fan according to a preferred embodiment of the vibration damping and liquefaction base of the offshore fan and the offshore fan of the present invention. Fig. 2 is a schematic view showing the provision of an offshore wind turbine according to a preferred embodiment of the vibration damping and liquefaction base of the offshore wind turbine and the offshore wind turbine of the present invention.

Claims (6)

The utility model relates to a vibration reducing and liquefaction foundation of a shore-mounted fan and an offshore fan, wherein the body of the shore-mounted fan or the offshore fan is disposed thereon, and the foundation for the vibration reduction and liquefaction of the shore-mounted fan and the offshore fan comprises: a balance unit, The utility model comprises a balance pile which is arranged at a plurality of intervals; a liquefaction prevention unit which is arranged on the balance unit and is made of reinforced concrete, and the liquefaction prevention unit protrudes into the ground or the seabed surface by 20 meters or more; The unit is disposed in the anti-liquefaction unit, and the damping unit comprises a plurality of spaced-apart retarding piles protruding from the top surface of the anti-liquefaction unit; a damping unit Provided on the vibration damping unit and made of reinforced concrete, the body is disposed on a top surface of the vibration damping unit; wherein the weight of the vibration damping unit is greater than 10 times the weight of the body, the liquidification prevention unit The weight is greater than 20 times the weight of the body, and the center of gravity of the shore or offshore fan is on the same gravity vertical reference line as the center of gravity of the damping unit. The grounding fan and the offshore fan vibration damping and liquefaction foundation according to claim 1, wherein, when the offshore fan is provided, the vibration damping unit is located above the full tide sea surface, and the bottom surface of the vibration damping unit is The distance between the full tide sea surface is 2 meters to 3 meters. The grounding fan and the offshore fan according to claim 1 are the vibration damping and liquefaction foundation, wherein when the shore fan is provided, the vibration damping unit is located above the ground, and the distance between the bottom surface of the vibration damping unit and the ground is 2 meters to 3 meters. The shore-mounted fan and the offshore fan vibration-damping liquefaction foundation according to any one of claims 1 to 3, wherein the body has a support column, and a blade is disposed above the support column, The length of the balance pile protruding from the bottom surface of the liquefaction prevention unit is equal to the length of the support column. The shore-mounted fan and the offshore fan vibration-damping and anti-liquefaction base according to any one of claims 1 to 3, wherein the weight of the vibration damping unit is equal to 10 times the weight of the body, and the weight of the liquid-proof unit Equal to 20 times the weight of the body. The grounding fan and the offshore fan vibration damping and liquefaction foundation according to claim 4, wherein the weight of the vibration damping unit is equal to 10 times the weight of the body, and the weight of the liquid prevention unit is equal to the weight of the body. 20 times.