CN108488024A - A kind of power generator for oscillating water column damper - Google Patents

Abstract

The present invention relates to a kind of power generator for oscillating water column damper, including turbine, generator and controller, turbine is located at the U-tube column bottom inner portion of oscillating water column damper, including two disks, rotary shaft, one group of flabellum axle and flabellum, two disks are fixed on the opposite upper and lower surfaces in U-tube column bottom end, one end of rotary shaft is connect by bearing with two disks, each flabellum is located between two disks and is connected on the rotary shaft by corresponding flabellum axle, the other end of rotary shaft is pierced by from U-tube column bottom end, it is pierced by position sealed connection, rotating torque is transmitted in the generator of o exterior by the rotation of flabellum by rotary shaft.The present invention can generate electricity while damping.

Description

A power generating device for an oscillating water column damper

technical field

The invention relates to a power generating device which can be installed in an oscillating water column damper.

Background technique

A variety of land and sea high-rise buildings will produce obvious overall movement under the action of external loads, which will reduce the structural strength and increase the probability of building damage. Due to their slender structural characteristics, high-rise buildings on land will produce relatively large reciprocating motions in the face of strong wind loads, causing internal structure fatigue fractures, resulting in structural failure or even destruction. The offshore floating platform is located in a deep water area far from the shore, and the operating environment is complex. Its overall movement, especially the horizontal movement, has a large amplitude, which will have adverse effects on improving the efficiency of drilling and production operations, platform safety and fatigue life. However, traditional methods such as strengthening the structural strength to restrain this movement will often greatly increase the construction cost, and the movement performance of the platform is determined by the structural form and characteristics of the platform. It is very difficult to improve its movement performance by strengthening the structure . Japan's Mitsubishi Steel Works has improved the passive shock absorber and developed an energy-saving building shock absorber (APWD), adding an oil pressure control system to make it have a positive shock absorber function. However, due to the limit of the maximum bearing pressure of the hydraulic device itself, the device can only be used for small buildings or working conditions with low loads, and its applicability is low. Among other efficient and low-cost solutions, passively controlled shock absorbers are a better choice. During the vibration reduction process, the device will absorb the energy generated by the building movement, and generate a large-amplitude stable liquid column reciprocating oscillating motion, thereby reducing the vibration amplitude of the building or offshore platform and achieving the effect of shock absorption. At the same time, the design and installation costs of the equipment are low, and the application range is wide, and it can be used on large land buildings and offshore platforms. ,

At the same time, the energy contained in the stable and regular fluid motion inside the shock absorber also has a very broad application prospect. Existing tidal current generators and wave energy generating devices, etc., all utilize tidal energy or wave energy in regular motion to generate electricity.

At present, the main body of the existing traditional tuned liquid column damper is usually a U-shaped column and contains a large amount of liquid. A partition with small holes or a throttle valve is installed on the U-shaped horizontal column, and the liquid in the tube will flow with the The reciprocating motion occurs due to the movement of the pipe string to achieve the shock absorption effect. However, due to the tightness of the U-shaped pipe string, it is difficult to replace the throttle orifice for different sea conditions, and the application range is narrow. And compared to the large amount of building space it occupies, it can only provide a fixed effect of shock absorption, which greatly reduces its applicability.

Contents of the invention

The purpose of the present invention is to provide a generator suitable for an oscillating water column damper, which can be applied to land buildings that often suffer from typhoons and other relatively large wind loads, and floating platforms working in deep sea conditions. The technical solution is as follows:

A power generation device for an oscillating water column damper, including a turbine, a generator and a controller, characterized in that the turbine is located inside the bottom of the U-shaped pipe column of the oscillating water column damper, including two discs, a rotating shaft, a A set of fan shaft and fan blades, two discs are fixed on the upper and lower surfaces opposite to the bottom of the U-shaped column, one end of the rotating shaft is connected to the two discs through a bearing, and each fan blade is located between the two discs The other end of the rotating shaft passes through the bottom end of the U-shaped pipe string, and the passing part is sealed and connected. The rotation of the fan blade transmits the rotational torque to the outside of the pipe string through the rotating shaft. in the generator.

Preferably, each fan blade has the same structure and size, with a semicircular cross-section, and is evenly distributed on the outer circumference of the rotating shaft. The controller controls the rotation of the fan blades to adjust to the most suitable angle according to the shock absorption working conditions and power generation requirements.

The present invention has the following advantages due to the adoption of the above technical scheme:

(1) The main body of the oscillating water column damper is a U-shaped pipe column fixed on the platform, which contains a large amount of liquid. The TLCD fixed on the platform will move with the movement of the platform, and the liquid inside will reciprocate accordingly. When the motion of the liquid is close to the natural frequency of the platform, the liquid will generate a large reciprocating motion and absorb part of the kinetic energy of the vibration of the platform, thereby achieving the effect of shock absorption. In the process of rotation, the power generation device will also provide damping force for the reciprocating movement of the fluid in the U-shaped pipe column like a traditional throttle plate, but it is different from a fixed throttle plate that can only provide a single damping force. The power generation device is connected to the power generation device through a shaft. Different loads applied to the power generation device during the power generation process will cause the power generation device in the U-shaped pipe string to rotate at different speeds, thereby providing different damping forces. In offshore conditions, the damping force can be adjusted accordingly to maximize the shock absorption effect.

(2) The section of the fan blade of the power generation device is semicircular to ensure that the liquid flows down in a certain direction, and the concave surface of the fan blade on the corresponding two sides faces the incoming flow, and the other convex surface faces the incoming flow. Therefore, the resultant force exerted by the liquid on the surface of the two symmetrical fan blades is different, thereby generating a counterclockwise moment and driving the entire fan blade device to rotate. When the liquid reciprocates in one cycle and the incoming flow hits the fan blade again from the opposite direction, the torque generated by the liquid is also counterclockwise, so that the entire fan blade is driven to rotate in one direction regardless of the incoming flow in any direction. Increased device life while maximizing power generation efficiency.

(3) During the working process, the reciprocating motion of the internal liquid drives the rotation of the blades of the power generation device. Through a shaft fixed in the middle of the fan blade, the generated torque is transmitted to the power generation device, which drives the power generation device to work, thereby providing electric energy for the operation on the platform.

Description of drawings

Figure 1 is a perspective view of an oscillating water column damper with two sets of power generating devices installed.

(1)(2)(3) in Fig. 2 are the states of the fan blades of the liquid column shock absorber under different resistances respectively.

Fig. 3 Force analysis diagram of fan blade.

Explanation of symbols in the figure:

1. U-shaped column; 2. Turbine; 3. Generator; 4. Rotary shaft; 5. Fan blade; 6. Fan blade shaft; 7 disc

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

The existing structural form can be improved by introducing power generation devices and other devices, so that the motion suppression system of the floating platform can also have the function of electric energy conversion, so that the motion suppression system with active control can realize the control of floating platforms in complex sea conditions by means of self-power supply. Global inhibition of overall movement. In addition, the carrying capacity and internal space of most offshore platforms and completed buildings are very limited. For offshore platforms, the power generation device that can be fully closed by using control can be installed on the offshore platform by modifying the columns and buoys that provide ballast. The connection between the column and the buoy is to establish a multi-functional structure optimization system that can provide sufficient power supply for the offshore platform that can operate under normal sea conditions. Or use the interior space of the decorative columns of land buildings to build U-shaped pipe columns inside the building, so as to achieve shock absorption and power generation in a limited space. Below in conjunction with accompanying drawing, illustrate the implementation process of this damping power generation device:

The oscillating water column damper installed with two sets of power generation devices of the present invention includes: a U-shaped pipe column 1, two turbines 3, rotating shafts 4 and generators 3 corresponding to the number of turbines. Among them, the U-shaped pipe column 1 needs to be selected according to the specific size of the actual installation building or platform, and the cross-section of the turbine 3 must be smaller than the bottom cross-sectional area of the U-shaped pipe column to ensure that its installation and operation will not touch the inner pipe wall . The generator 3 can be selected according to the actual demand for generating electric power, so as to maximize the utilization of the generated electric power.

Each part of the invention can be manufactured separately, transported, and finally assembled on the platform. The various components mentioned above are determined according to the specific platform objects, such as the number, length, cross-sectional area, radius, and relevant characteristics of the turbine, and are flexibly combined to form a system that is suitable for both shock absorption and power generation, and provides electrical energy for buildings. shock absorbing power generation device.

The main body of the oscillating water column damper is a U-shaped pipe column 1 with the same size as the platform, which can be fixed on the upper main structure of the platform device or the underwater part. Both ends of the U-shaped pipe string are sealed, and the fluid inside is smaller than the volume of the pipe string to ensure that the liquid will flow inside during the vibration process of the platform and the U-shaped pipe string. A small hole is opened in the middle and upper part of the U-shaped pipe string so that it can just insert a rotating shaft 4, and the surrounding of the small hole is sealed, and the watertightness of the whole device and the flexibility of the rotating shaft rotation are ensured by bearings and other devices. One end of the rotating shaft is connected with four fan blades 5 arranged at an angle of 90 degrees, which will rotate around the shaft under the push of the internal fluid.

At the same time, because the fan blades 5 corresponding to the two ends of the rotating shaft 4 are semicircular in shape, the torque generated by the two fan blades to the rotating shaft is different when facing the incoming flow in the same direction. Thereby driving the rotating shaft to rotate counterclockwise. The direction of the fluid will change in one vibration cycle, but because of the special arrangement of the fan blades, no matter which direction the fluid flows from, the resultant torque generated is counterclockwise. Therefore, it can continue to rotate counterclockwise when the platform is vibrated by an external force.

The other end of the rotating shaft is connected to a generator. The fan blades drive the rotating shaft to rotate, and then drive the corresponding equipment of the built-in generator to work, thereby converting kinetic energy into electrical energy. Provides power supply for the entire platform.

Damping force acting on the whole device. When the platform is to obtain a specific damping force, so that the hydraulic frequency of the device is close to the natural frequency of the entire device, so as to achieve the optimal shock absorption effect, different power generation power can be selected through the generator to apply a specific magnitude to the rotating shaft. The reaction moment, so as to achieve the optimization of the shock absorption effect.

As shown in Figure 1, in order to improve the utilization efficiency of liquid power, obtain better power generation efficiency, and at the same time improve the shock absorption effect of the shock absorption power generation device. Two or more turbines and generators can be installed inside the U-shaped pipe string. Each turbine is independent of each other, and each corresponds to a generator, so that the whole device can obtain more forms of liquid damping force, which is more helpful to adjust the natural frequency of the device, so that it can meet the shock absorption requirements under more working conditions.

The implementation of adjusting the fan blade rotation angle to obtain different fluid damping forces is shown in Figure 2. In FIG. 2 , each blade 5 is fixed on a disc 7 through a blade shaft 6 , wherein the blade 5 can rotate around the blade shaft 6 at a certain angle. In order to obtain the maximum liquid damping force, the fan blade can be opened to the maximum, as shown in Figure 1, so that the tangent line between the vertical line of the blade end point of the fan blade and the intersection point of the disc has obtained the maximum front flow area, thus Increased liquid damping force. If the liquid damping force is adjusted down, each fan blade can be rotated clockwise around the fan blade shaft 6 at an equal angle. In this way, the front flow area of the fan blade is adjusted to be small, and the liquid damping force is reduced. The rotation of the fan blades is controlled by the controller, which is adjusted to the most suitable angle according to different shock absorption conditions and power generation requirements.

As shown in Figure 3, under the action of the incoming flow, the concave blade surface and the convex blade surface of the generating device are simultaneously subjected to the drag force of the incoming flow. However, because the drag force of the fluid on the concave blade surface is greater than that of the convex blade surface, the total force on the concave blade surface is greater than that of the convex blade surface. The hour hand turns. When the liquid flows through the power generating device from another direction in the second half cycle of the oscillation, the position of the concave blade surface and the convex blade surface is opposite to that of the first half cycle, so that a counterclockwise torque can also be generated, so that the whole cycle Fluid power can be used to generate electricity to obtain maximum power generation efficiency.

Claims (2)

1. A power generating device for an oscillating water column damper, comprising a turbine, a generator and a controller, characterized in that the turbine is positioned at the bottom of the U-shaped pipe column of the oscillating water column damper, including two discs, a rotating shaft 1. A set of fan blade shaft and fan blades. The two discs are fixed on the upper and lower surfaces opposite to the bottom of the U-shaped column. One end of the rotating shaft is connected to the two discs through bearings. Each fan blade is located on the two discs. The discs are connected to the rotating shaft through the corresponding fan shaft, and the other end of the rotating shaft passes through the bottom of the U-shaped pipe column, and the passing part is sealed and connected. The rotation of the fan blade transmits the rotational torque to the pipe through the rotating shaft. in the generator outside the column. 2. The power generating device according to claim 1, characterized in that each fan blade has the same structure and size, the average cross-section is semicircular, and is evenly distributed on the outer circumference of the rotating shaft, and is controlled by the controller according to the shock absorption working conditions and power generation requirements The fan blades rotate to adjust to the most suitable angle.