CN103470737A - Intelligent damping equipment of wind power gear box - Google Patents

Abstract

The invention discloses an intelligent damping device for a wind power gearbox, comprising a damping element holder installed on the wind turbine and a vibration sensor installed on the wind turbine gearbox, the vibration damping element is installed on the vibration damping element holder, and the vibration Both the sensor and the damping element are connected to the controller via connecting cables. In the present invention, since the magnetorheological fluid can change the damping characteristics according to the change of the magnetic field, the stiffness and damping of the damping element can be adjusted to meet the vibration damping needs of the wind power gearbox in a large frequency range; the stiffness adjustment range of the system can be greatly enhanced, so that The vibration damping element has good vibration damping characteristics at both low frequency and high frequency; the energy consumption is very small, and active control under low energy consumption can be realized; because of the vibration sensor, the controller can combine the system model with the vibration level measured by the vibration sensor , Intelligently adjust the damping of the magnetorheological fluid in the four damping elements, so as to realize the active and intelligent control of the vibration amplitude of the gearbox, so as to achieve a good vibration damping effect.

Description

Intelligent vibration reduction device for wind power gearbox

technical field

The invention relates to an intelligent damping device for a wind power gearbox.

Background technique

At present, with the shortage of energy and the deterioration of the ecological environment, countries around the world have generally realized the importance of new energy power generation technology, and have carried out a lot of research and development work in the fields of wind energy, nuclear energy, and solar energy. As a clean and renewable energy, wind energy has been strongly encouraged by governments of various countries and has developed rapidly. In the past 10 years, the installed capacity of wind power in the world has grown rapidly at an annual growth rate of nearly 30%, and the installed capacity of wind power in my country has grown the fastest. The country with the largest wind power installed capacity in the world. Wind energy development can reduce air and water pollution, but if not handled properly, it can increase noise pollution. The gearbox in a wind turbine is an important mechanical component. As a component that transmits power, it bears both dynamic and static loads during operation, causing the gearbox to generate complex vibration and noise, which will affect the entire wind turbine. Therefore, it is necessary to use certain devices to control the vibration and noise of the gearbox within the specified range.

Elastic support is an important means to improve the vibration and noise level of wind power gearboxes. The elastic supports currently used mainly include rubber elastic supports and liquid composite elastic supports. The rubber elastic support mainly uses the elasticity of the rubber to achieve the purpose of reducing the vibration of the fan gearbox. The principle is to select the shape and size of the rubber so that the stiffness coefficient in each direction reaches the desired value. The internal friction damping effect generated by the interaction of the gearbox isolates the vibration of the gearbox. However, due to the large dynamic stiffness of rubber at high frequencies, this characteristic not only cannot suppress vibration, but will deteriorate the high-frequency vibration and noise performance of the system. Therefore, the rubber elastic support cannot achieve a good vibration isolation and noise reduction effect of the system at high frequencies. Liquid composite elastic support is a vibration-damping support technology developed on the basis of rubber elastic support. This technology adds liquid chambers inside the rubber and cross-connects the liquid chambers on the two torque arm sides of the gearbox. Compared with rubber elastic supports, It can increase the stiffness range of the entire elastic support and improve the ability to suppress the vibration of the gearbox. However, this technology passively changes the stiffness and damping according to the vibration level of the gearbox. Vibration reduction requirements for the frequency range.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an intelligent damping device for a wind power gearbox, which can actively adjust the system stiffness and damping according to the vibration level of the gearbox.

To achieve the above object, the present invention adopts the following technical solutions:

An intelligent damping device for a wind power gearbox, comprising a damping element holder installed on a wind turbine and a vibration sensor installed on the wind turbine gearbox, the vibration damping element holder is equipped with a vibration damping element, a vibration sensor and The damping elements are connected to the controller via connecting cables.

The damping element includes a bottom plate with a cavity, and the edge of the bottom plate is connected with a rubber support plate, a throttling plate and an elastic piece sequentially from top to bottom through bolts, and an elastic rubber shell with a cavity inside is installed on the rubber support plate , the top of the elastic rubber shell is provided with a connecting plate, and the connecting plate is provided with a liquid-filled screw communicating with the inner cavity of the elastic rubber shell; the concave cavity of the bottom plate and the cavity of the elastic rubber shell together form a large cavity Body, the large cavity is divided into upper and lower parts by elastic parts, one end of the throttle plate extends into the upper half of the large cavity, a coil is wound on the throttle plate, and one end of the coil is connected to the controller; the large cavity The upper half is filled with magnetorheological fluid and the lower half is filled with nitrogen gas.

Throttle holes are opened on the throttle plate.

The invention includes a vibration damping element holder, a vibration sensor, a connecting cable, a controller, and a vibration damping element. Controller and damping elements.

The damping element includes liquid-filled screws, connecting plates, elastic rubber, magnetorheological fluid, coils, rubber support plates, throttle plates, elastic parts, bottom plates, connecting bolts and nitrogen. The connecting plates are installed on the elastic rubber, and the connecting plates are installed There are liquid-filled screws, the elastic rubber is installed on the rubber support plate, the rubber support plate, throttle plate and elastic parts are connected to the bottom plate through connecting bolts, the coil is installed on the throttle plate, and the throttle plate has a throttle hole. Nitrogen is filled between the elastic member and the bottom plate.

According to the signal measured by the vibration sensor, combined with the model of the fan system, the controller intelligently calculates the stiffness and damping required for system vibration reduction, and outputs an appropriate current to the coil through the connecting cable. The coil generates a magnetic field on the throttle plate, and the change of the magnetic field It causes changes in the characteristics of the magneto-rheological fluid, thereby changing the stiffness and damping of the damping element, and achieving the purpose of reducing vibration and noise of the system.

The elastic rubber is rubber or metal composite rubber.

The beneficial effects of the present invention are:

1. Since the magnetorheological fluid can change the damping characteristics according to the change of the magnetic field, thereby adjusting the stiffness and damping of the damping element, the present invention can meet the vibration damping needs of the wind power gearbox in a large frequency range;

2. The present invention adopts the combination of elastic rubber, magnetorheological fluid and nitrogen chamber, which can greatly enhance the stiffness adjustment range of the system, so that the vibration damping element has good vibration damping characteristics at both low frequency and high frequency;

3. Since the magnetorheological fluid requires only a small amount of electricity to achieve a huge change in characteristics, the energy consumption of the present invention is very small, and active control under low energy consumption can be realized;

4. Due to the vibration sensor, the controller can intelligently adjust the damping of the magnetorheological fluid in the four damping elements according to the vibration level measured by the vibration sensor, combined with the system model, so as to realize the active and intelligent vibration amplitude of the gearbox control, so as to achieve a good damping effect.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of a damping element;

Among them, 1. Wind power gearbox, 2. Damping element cage, 3. Damping element, 4. Vibration sensor, 5. Connecting cable, 6. Controller, 7. Fluid-filled screw, 8. Connecting plate, 9. Elastic rubber, 10. . Magnetorheological fluid, 11. Coil, 12. Connecting bolts, 13. Rubber support plate, 14. Throttle plate, 15. Elastic member, 16. Nitrogen gas, 17. Base plate.

Detailed ways

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

In Fig. 1, the elastic element holder 2 is installed on the wind turbine, the damping element 3 is installed on the elastic element holder 2 through bolts, and the two reaction arms of the wind power gearbox 1 are respectively installed between the upper and lower vibration damping elements 3 During the period, the vibration sensor 4 is installed on the wind power gearbox 1, the vibration sensor 4 is connected to the controller 6, and the four elastic elements 3 are connected to the controller 6 through connecting cables 5 respectively.

In Fig. 2, the connecting plate 8 is connected with the elastic rubber 9, the liquid filling screw 7 is installed on the connecting plate 8, the elastic rubber 9 is installed on the rubber supporting plate 14, the throttle plate 14 and the elastic member 15 are supported by the connecting bolt 12 and the rubber The plate 14 is connected to the base plate 17, the coil 11 is connected to the throttling plate 14, the connection plate 8, the elastic rubber 9, the rubber support plate 14 and the elastic member 15 are filled with magnetorheological fluid, and the space between the elastic member 15 and the base plate 17 is filled with Nitrogen 16.

According to the signal measured by the vibration sensor, combined with the fan system model, the controller 6 intelligently calculates the stiffness and damping required for system vibration reduction, and outputs an appropriate current to the coil through the connecting cable, and the coil generates a magnetic field on the throttle plate. The changes cause the characteristics of the magneto-rheological fluid to change, thereby changing the stiffness and damping of the damping element, and achieving the purpose of reducing vibration and noise of the system.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (3)

1. the intelligent vibration damping device of a wind turbine gearbox, it is characterized in that, comprise the damping element retainer be installed on blower fan and be installed on the vibration transducer on gear case of blower, on described damping element retainer, damping element is installed, vibration transducer and damping element all are connected to controller by conjunction cable.

2. the intelligent vibration damping device of wind turbine gearbox as claimed in claim 1, it is characterized in that, described damping element comprises a base plate with cavity, bottom edge connects rubber plate, Rectifier plate and elastic component from top to bottom successively by bolt, the inner elastic caoutchouc housing with cavity is installed on the rubber plate, the top of elastic caoutchouc housing is provided with connecting plate, is provided with the topping up screw communicated with elastic caoutchouc enclosure interior cavity on connecting plate; A large cavity of the common composition of the cavity of the cavity of described base plate and elastic caoutchouc housing, large cavity is divided into upper and lower two-part by elastic component, and an end of Rectifier plate extend in upper half part of large cavity, is wound with coil on Rectifier plate, and coil one end is connected to controller; Be filled with magnetic flow liquid in upper half part of large cavity, be filled with nitrogen in lower half portion.

3. the intelligent vibration damping device of wind turbine gearbox as claimed in claim 1, is characterized in that, on described Rectifier plate, has throttle orifice.

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