CN202194778U - a wind generator - Google Patents

Abstract

The utility model proposes a wind turbine generator, comprising: a wind wheel, comprising a hub and blades mounted on the hub, for capturing wind energy and converting the captured wind energy into mechanical energy; a hydraulic pump, connected to the wind wheel, for absorbing mechanical energy and generating high-pressure liquid with a pressure greater than a first preset threshold through mechanical energy; a hydraulic motor, comprising an output shaft, for receiving the high-pressure liquid generated by the hydraulic pump, and the output shaft is driven to rotate by the high-pressure liquid; a power generation device, connected to the hydraulic motor, and driven to generate electricity by the output shaft of the hydraulic motor. The wind turbine generator described in the utility model can effectively reduce the weight of the wind turbine generator and reduce the cost.

Description

a wind generator

technical field

The utility model relates to the field of wind power generation, in particular to a wind power generator.

Background technique

With the increasingly prominent social energy and environmental issues, the development and utilization of new energy plays an increasingly important role in the development of human society. Wind power has the advantages of renewable, abundant resources, environmental protection, and relatively low power generation cost. It has become an important way of new energy development and utilization, and plays an important role in building a new low-carbon society.

At present, most of the wind turbines that are maturely applied in the market are high-speed wind turbines with gearbox speed-up or direct-drive wind turbines. With the maturity and development of wind power generation technology, especially the demand for larger machines in offshore wind power generation, the capacity of wind power generators has a tendency to gradually increase in size. The existing wind power generator unit capacity has reached 6MW-7MW. With the increase of the wind power generator unit capacity, the weight of the wind power generator has also increased. The weight of the existing 6MW wind power generator has reached several hundred tons, which makes The towers and foundations supporting the wind turbines are becoming heavier and heavier. At the same time, the increase in the weight of the wind turbines also brings certain difficulties to the transportation and installation at sea. In addition, due to the heavy weight of the wind turbine and the harsh environment at sea, severe weather such as storms often occurs, the blades, nacelle, tower and foundation of the wind turbine are also subjected to a large load, which greatly affects the wind turbine. service life. The reliability and maintainability of wind turbines are very important for offshore wind turbines. This is related to the operation and maintenance costs of offshore wind farms and affects the return on wind farm investment. Therefore, with the enlargement of wind power generators, the lightweight design of wind power generators and the improvement of their reliability are becoming more and more important.

Utility model content

The utility model provides a wind power generator, which can effectively reduce the weight and cost of the wind power generator.

The technical scheme of the utility model is achieved in that:

A wind generator comprising:

a wind wheel, comprising a hub and blades mounted on said hub, for capturing wind energy and converting the captured wind energy into mechanical energy;

a hydraulic pump, connected to the wind wheel, used to absorb mechanical energy, and generate a high-pressure liquid with a pressure greater than a first preset threshold through the mechanical energy;

The hydraulic motor includes an output shaft for receiving the high-pressure liquid generated by the hydraulic pump, and the high-pressure liquid drives the output shaft to rotate;

The power generating device is connected with the hydraulic motor and driven by the output shaft of the hydraulic motor to generate electric energy.

Preferably, it also includes:

The hydraulic transmission pipeline is connected to the hydraulic pump and the hydraulic motor, and is used to transmit the high-pressure liquid generated by the hydraulic pump to the hydraulic motor.

Preferably, the number of the hydraulic pumps is multiple, the number of the hydraulic motors matches the number of the hydraulic pumps, and are correspondingly connected through the hydraulic transmission pipelines;

The number of the power generating devices is matched with the number of the hydraulic motors, and are correspondingly connected with the hydraulic motors respectively.

Preferably, it also includes:

A judging device, configured to judge the magnitude of the wind power of the wind energy, and generate corresponding judgment information according to the wind power of the wind energy;

The control device is configured to control a corresponding number of hydraulic pumps to be turned off when the judgment information indicates that the wind power of the wind energy is less than a second preset threshold.

Preferably, it also includes:

The tower, the hydraulic motor and the power generation device are arranged on the top platform of the tower.

Preferably, it also includes:

The nacelle is arranged on the top of the tower, and the hydraulic pump is arranged in the nacelle.

Preferably, it also includes:

The output device is arranged in the tower and is used to transmit the electric energy generated by the power generation device to an external power grid.

The technical scheme of the utility model adopts hydraulic transmission instead of traditional gear transmission or other transmission methods, and the energy transmission of the wind power generator is realized through hydraulic pressure. Compared with the traditional wind power generator, the bulky and heavy gear box can be omitted; the utility model also There is no need to use a heavy generator like a direct drive wind generator, which greatly reduces the weight of the wind generator, so that the layout of the components of the wind generator is reasonable, effectively reducing the weight of the wind generator and reducing the cost; Further, the hydraulic transmission system can use multiple hydraulic pumps, hydraulic motors and power generation devices, and can control some hydraulic pumps, hydraulic motors and power generation devices to stop working under the condition of low wind speed, which is beneficial to improve the efficiency and the service life of each component.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a schematic structural view of a first embodiment of a wind power generator of the present invention;

Fig. 2 is a schematic structural view of another embodiment of a wind power generator of the present invention;

FIG. 3 is a schematic diagram of the principle of the wind power generator shown in FIG. 2 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to FIG. 1 , in a first embodiment of a wind power generator of the present invention, the wind power generator 100 includes a wind wheel 1 , a hydraulic pump 2 , a hydraulic motor 6 and a power generation device 7 .

The wind wheel 1 includes a hub and blades arranged on the hub for capturing wind energy and converting the captured wind energy into mechanical energy.

The wind wheel 1 generally consists of a hub and 1 to 3 blades or other number of blades, and its function is to convert wind energy into mechanical energy. In a preferred embodiment of the present invention, the number of blades is preferably 3. The blades are installed on the hub, preferably by bolts. Of course, other fixing methods can also be used to install the blades on the hub, such as welding, which is not limited in the present invention. Blades are generally made of fiberglass or other composite materials.

The hydraulic pump 2 is connected with the wind wheel 1 and is used to absorb mechanical energy and generate high-pressure liquid with a pressure greater than a first preset threshold through the mechanical energy.

The first preset threshold can be set according to demand conditions and actual needs. For example, the first preset threshold can be 1MPa, 3MPa, 5MPa or other values, which is not limited by the present invention.

The hydraulic motor 6 includes an output shaft for receiving the high-pressure liquid generated by the hydraulic pump 2, and the high-pressure liquid drives the output shaft to rotate.

The power generating device 7 is connected with the hydraulic motor 6 and driven by the rotation of the output shaft of the hydraulic motor 6 to generate electric energy.

In another embodiment of the present utility model, the wind power generator 100 further includes:

The hydraulic transmission pipeline 3 connects the hydraulic pump 2 and the hydraulic motor 6 and is used to transmit the high-pressure liquid generated by the hydraulic pump 2 to the hydraulic motor 6 .

In addition, the wind power generator 100 further includes a tower 8 , and the hydraulic motor 6 and the power generation device 7 are arranged in the tower 8 . Preferably, the hydraulic motor 6 and the power generating device 7 are arranged on the top platform in the tower 8, and the hydraulic motor 6 and the generating device 7 are arranged in the tower 8, which can reduce the weight of the engine room and reduce the weight of the engine room. Short hydraulic transmission path reduces energy loss.

In addition, the wind power generator 100 also includes:

The nacelle 5 is arranged on the top of the tower 8 , and the hydraulic pump 2 is arranged in the nacelle 5 .

Preferably, the wind power generator 100 also includes:

The output device is arranged in the tower 8 and is used to transmit the electric energy generated by the power generation device 7 to an external power grid.

The technical scheme of the utility model adopts hydraulic transmission instead of traditional gear transmission or other transmission methods, and the energy transmission of the wind power generator is realized through hydraulic pressure. Compared with the traditional wind power generator, the heavy and bulky gearbox can be omitted, and the There is no need to use a heavy generator like a direct wind generator, which greatly reduces the weight of the wind generator, thereby making the layout of the components of the entire wind generator 100 reasonable, effectively reducing the weight of the wind generator, and reducing the Cost; further, the hydraulic motor 6 and the power generation device 7 are arranged in the tower 8, which can reduce the weight of the engine room 5, shorten the hydraulic transmission path, and reduce energy loss.

Referring to FIG. 2 , in another embodiment of a wind power generator 100 of the present invention, the wind power generator 100 includes a plurality of hydraulic pumps 2 , a plurality of hydraulic motors 6 and a plurality of Power generation device 7, in a preferred embodiment, the number of the hydraulic pump 2, hydraulic motor 6 and power generation device 7 is equal, and the hydraulic pump 2, hydraulic motor 6 and power generation device 7 are connected in one-to-one correspondence, that is, one hydraulic pump 2 is connected to a hydraulic motor 6, and a hydraulic motor 6 is connected to a power generation device 7, and the hydraulic pump 2 and the hydraulic motor 6 can be connected through a hydraulic transmission pipeline 3.

In addition, the wind power generator 100 may also include:

The judging device 9 is used for judging the magnitude of the wind power of the wind energy, and generating corresponding judging information according to the wind power of the wind energy.

The judging device 9 is used for judging the magnitude of the wind force, and the judging information is information indicating the magnitude of the wind force.

The control device 4 is configured to control a corresponding number of hydraulic pumps 2 to shut down when the judgment information indicates that the wind power of the wind energy is less than a second preset threshold.

The second preset threshold can be set according to the demand situation and actual demand. For example, the second preset threshold can be 3 levels, 5 levels, 8 levels or other values, which is not limited in the present invention.

The control device 4 controls the corresponding number of hydraulic pumps 2 to be closed according to the corresponding wind force, wherein the corresponding relationship between the magnitude of the wind force and the number of closed hydraulic pumps 2 can also be set according to actual conditions and actual needs, such as wind force When it is level 6, one hydraulic pump 2 is turned off; when the wind force is level 5, two hydraulic pumps 2 are turned off... In addition, there may be other corresponding relationships between the magnitude of the wind force and the number of closed hydraulic pumps 2 , the utility model does not limit this.

After the hydraulic pump 2 is turned off, the corresponding hydraulic motor 6 and power generation device 7 connected to the hydraulic pump 2 also stop working, that is, the control device 4 can indirectly control the hydraulic motor 6 and power generation device 7, of course, it can be understood Yes, the control device 4 can also directly control the hydraulic motor 6 and the power generation device 7 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (7)

1. a wind-driven generator is characterized in that, comprising:

Wind wheel comprises wheel hub and is installed in the blade on the said wheel hub, is used for capturing wind energy, and converts the wind energy of catching into mechanical energy;

Oil hydraulic pump is connected with said wind wheel, is used to absorb mechanical energy, and produces the highly pressurised liquid of pressure greater than first predetermined threshold value through mechanical energy;

Oil hydraulic motor comprises output shaft, is used to receive the highly pressurised liquid that said oil hydraulic pump produces, and is rotated by the said output shaft of high pressure liquid drives;

Electricity generating device is connected with said oil hydraulic motor, by said hydraulic motor output shaft driving and generating electric energy.

2. wind-driven generator according to claim 1 is characterized in that, also comprises:

The hydraulic pressure transfer conduit connects said oil hydraulic pump and said oil hydraulic motor, is used for the highly pressurised liquid that said oil hydraulic pump produces is delivered to said oil hydraulic motor.

3. wind-driven generator according to claim 2 is characterized in that, the quantity of said oil hydraulic pump is a plurality of, and the quantity of said oil hydraulic motor and the quantity of said oil hydraulic pump are complementary, and connects through said hydraulic pressure transfer conduit is corresponding respectively;

The quantity of said electricity generating device and the quantity of said oil hydraulic motor are complementary, and distinguish corresponding connection with said oil hydraulic motor.

4. wind-driven generator according to claim 3 is characterized in that, also comprises:

Judgment means is used to judge that the wind-force of said wind energy is big or small, and produces corresponding judgment information according to the wind-force of wind energy;

Control gear, the wind-force that is used for showing wind energy when said judgement information are during less than second predetermined threshold value, and the oil hydraulic pump of control respective numbers cuts out.

5. according to each described wind-driven generator of claim 1 to 4, it is characterized in that, also comprise:

The tower tube, said oil hydraulic motor and said electricity generating device are arranged at the top platform of said tower tube.

6. wind-driven generator according to claim 5 is characterized in that, also comprises:

The cabin is arranged at the top of said tower tube, and said oil hydraulic pump is arranged in the said cabin.

7. wind-driven generator according to claim 6 is characterized in that, also comprises:

Output unit is arranged in the said tower tube, and the power delivery that is used for said electricity generating device is produced is to external electrical network.

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