CN206290369U - Wind power generating set and its hydraulic variable propeller system - Google Patents

Abstract

A wind turbine generator set and a hydraulic pitch system thereof are disclosed. The hydraulic pitch system includes a pitch bearing, the inner ring of the pitch bearing is fixed relative to one of the blades and the hub of the wind turbine set, and the outer ring Fixed relative to the other of the blade and the hub; a mounting ring, fixed on one of the outer ring and the inner ring of the pitch bearing, and a connecting flange formed on the circumferential inner side of the mounting ring; a web fixed to the other one of the outer ring and the inner ring of the pitch bearing; a hydraulic drive assembly installed on the web and the mounting ring, wherein the pitch bearing, the mounting ring The ring, the web and the hydraulic drive assembly are assembled into an assembly module, and the assembly module is assembled to the hub, thereby achieving modular installation, improving installation efficiency, and reducing the difficulty of maintenance operations.

Description

Wind turbine and its hydraulic pitch system

technical field

The utility model relates to the field of wind power generation, in particular, the utility model relates to a wind power generating set and a hydraulic pitch changing system thereof.

Background technique

Generally, for a wind turbine using a hydraulic pitch system, referring to Figures 1 and 2, the three front mounting holes of the hub 1 are provided with webs 4, and the hydraulic drive assembly 5 is installed on the hub through the mounting flange inside the hub 1. 1, a bearing web 4 is connected to the pitch bearing 2, and the outer ring of the pitch bearing 2 is connected to the wheel hub 1 through bolts 3.

The three sets of hydraulic drive components of the hydraulic pitch system are all arranged inside the hub 1. Due to the limited space inside the hub 1 and the many components of the hydraulic drive components, including oil cylinders, pipelines, valves and other components, these components need The respective installation structures lead to the need for more installation interfaces inside the hub. On the one hand, the installation process needs to be carried out separately, resulting in low installation efficiency, and the internal structure of the hub is complicated, which increases the manufacturing cost.

Utility model content

The purpose of the utility model is to provide a hydraulic pitch control system for a wind power generating set, so as to realize modular installation, improve installation efficiency, and reduce the difficulty of maintenance operations.

Another object of the utility model is to provide a wind power generating set.

In order to achieve the above object, the utility model provides a hydraulic pitch system for a wind power generating set, the hydraulic pitch system includes: a pitch bearing, the inner ring of the pitch bearing is opposite to the blade of the wind power generator fixed to one of the hubs, and the outer ring is fixed to the other of the blades of the wind turbine and the hub; the mounting ring is fixed to one of the outer ring and the inner ring of the pitch bearing, and A connecting flange is formed on the circumferential inner side of the mounting ring; a web is fixed to the other of the outer ring and the inner ring of the pitch bearing; a hydraulic drive assembly is installed on the web and the mounting ring, wherein the pitch bearing, the mounting ring, the web and the hydraulic drive assembly are assembled into an assembly module, and the assembly module is assembled on the hub.

Preferably, the hydraulic drive assembly includes an oil cylinder and an accumulator, one end of the oil cylinder is connected to the connecting flange, the other end is connected to the web, and the energy accumulator is connected to the mounting ring.

Preferably, the inner ring of the pitch bearing is fixed relative to the blade, the outer ring is fixed relative to the hub, the mounting ring is fixed on the outer ring of the pitch bearing, and the web is fixed to the inner ring of the pitch bearing.

Preferably, the pre-assembled module is assembled to the hub by fastening bolts passing through the outer ring of the pitch bearing, the mounting ring and the hub.

Preferably, the mounting ring is bolted to the outer ring of the pitch bearing.

According to another embodiment of the present utility model, a wind power generating set is provided, the wind power generating set includes a hub, and the aforementioned hydraulic pitch system is connected to the hub.

Preferably, the wind power generating set includes three sets of hydraulic pitch control systems assembled at the same time, which are respectively used for pitching the three blades of the wind power generator.

Through the wind power generating set and its hydraulic pitch changing system provided by the utility model, the following beneficial effects can be obtained:

1. The components of the three sets of hydraulic pitch system can be pre-assembled on the outside of the hub at the same time, and then assembled to the hub as a whole, so that the three sets of pitch drive components can be installed at the same time, which greatly improves the installation efficiency;

2. The flange structure used to install the hydraulic drive components inside the hub is canceled, which simplifies the hub structure and reduces the manufacturing cost;

3. An additional installable ring is set in the hydraulic pitch system, which can improve the overall structural strength;

4. The installation process is optimized, modular installation is realized, and assembly efficiency is significantly improved.

Description of drawings

Fig. 1 is a schematic diagram of a hydraulic pitch system installed in a wheel hub in the prior art;

Fig. 2 is a partial sectional view taken along line A-A in Fig. 1;

Fig. 3 is a structural schematic diagram of a hub according to an embodiment of the present invention;

4 is a schematic diagram of a pre-assembled module according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of an assembled hydraulic pitch system according to an embodiment of the present invention;

Fig. 6 is a partial sectional view taken along line A-A in Fig. 5 .

detailed description

In order to enable those skilled in the art to better understand the utility model, specific embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 3 to Fig. 6, wherein Fig. 3 is a schematic structural view of a wheel hub according to an embodiment of the present utility model, Fig. 4 is a schematic view of a pre-assembled module according to an embodiment of the present utility model, and Fig. 5 is a schematic view according to an implementation of the present utility model Fig. 6 is a partial sectional view taken along line A-A in Fig. 5 .

According to an embodiment of the present utility model, a hydraulic pitch system for a wind power generating set is provided, which is used for pitching respective blades.

The hydraulic pitch system includes a pitch bearing 13, the outer ring of the pitch bearing 13 is fixed to one of the hub 11 and the blade of the wind power generating set, and the inner ring is fixed to the other of the hub 11 of the wind generating set and the blade. One is fixed. A mounting ring 12 is fixedly arranged on one side of the outer ring and the inner ring of the pitch bearing 13 , and the connection between the two can be realized, for example, by bolts. A web 14 is connected to the other of the outer ring and the inner ring of the pitch bearing 13 , and the web 14 is parallel to the plane where the pitch bearing 13 is located.

In the following, the inner ring of the pitch bearing 13 is fixed relative to the blade, the outer ring is fixed relative to the hub 11, the mounting ring 12 is fixed on the outer ring of the pitch bearing, and the web 14 is fixed to the inner ring of the pitch bearing as an example. describe.

A connecting flange 121 is provided on the circumferential inner surface of the mounting ring 12 and can be used for connecting the hydraulic drive assembly 15 . Specifically, the hydraulic drive assembly may include an oil cylinder 151 and an accumulator 152. One end of the oil cylinder 151 is connected to the connecting flange 121 on the mounting ring 12, and the other end is connected to the web 14, so that the expansion and contraction of the oil cylinder 151 drives the web. The plate 14 rotates, and then drives the inner ring and the blades of the pitch bearing 13 to rotate to realize the pitch change. An accumulator 152 may be used to store hydraulic oil, both ends of which may be connected to the mounting ring 12 . In an embodiment, the hydraulic drive assembly may include two sets of oil cylinders 151 and accumulators 152 to provide sufficient force for pitch change and achieve smooth pitch change. In addition, other components in the hydraulic drive assembly may also be connected to the mounting ring 12 .

It should be noted that since the connecting flange 121 used to connect the hydraulic drive assembly is arranged on the mounting ring 12, on the hub 11 of the wind power generating set, the original internal flange structure can be canceled, thereby simplifying the The structure of the hub 11 is shown, as shown in Figure 3.

When the hydraulic pitch system needs to be assembled, firstly, the inner ring of the pitch bearing 13 can be fixed together with the web plate 14, the mounting ring 12 can be fixed together with the outer ring of the pitch bearing 13, and then the hydraulic cylinder 151 and the accumulator can be fixed together. The hydraulic drive assembly 15 such as the transducer 152 is assembled on the mounting ring 12 and the web 14, as shown in FIG. 4 . In this way, the pitch bearing 13, the mounting ring 12, the web 14 and the hydraulic drive assembly 15 can be assembled together, and the assembled module can be called a pre-assembled module. The pre-assembled module can then be integrally assembled on the hub 11 , as shown in FIGS. 5 and 6 . For example, the assembly of the pre-assembled module and the hub 11 can be realized by fastening bolts passing through the outer ring of the pitch bearing 13 , the mounting ring 12 and the hub 11 .

During the above assembling process, the assembling of the pitch bearing 13, the web 14, the mounting ring 12 and the hydraulic drive assembly 15 may be performed in any suitable order, and is not limited to the chronological order described above.

In addition, three sets of hydraulic pitch systems are provided on the wind turbines for pitching the three blades. During assembly, three groups of hydraulic pitch control systems can be performed simultaneously, that is to say, the pre-assembled modules can be assembled outside the hub 11 at the same time, and then the three pre-assembled modules can be assembled on the hub 11 at the same time.

Through the hydraulic pitch changing system provided by the utility model, on the one hand, the structure of the hub 11 and its manufacturing process are simplified, and the manufacturing cost is reduced; on the other hand, by assembling a pre-assembled module outside the hub 11, the The pre-assembled module is integrally assembled on the hub 11, so that it is no longer limited by the narrow space inside the hub 11, simplifies the assembly process, and significantly improves the assembly efficiency. In addition, the installation ring 12 is also used in the hydraulic pitch system, and the installation ring 12 can also play a role in strengthening the structural strength, thereby helping to improve the performance of the hydraulic pitch system and prolong the service life of the hydraulic pitch system.

According to another embodiment of the present invention, there is provided a wind power generating set, which includes the above-mentioned hydraulic pitch system and hub 11 , which will not be repeated here.

The specific implementation of the present utility model has been described in detail above, although some embodiments have been shown and described, those skilled in the art should understand that without departing from the principle of the utility model whose scope is defined by claims and their equivalents Under the condition of spirit and spirit, these embodiments can be modified and improved, and these modifications and improvements should also be within the protection scope of the present utility model.

Claims (7)

1. a kind of hydraulic variable propeller system of wind power generating set, it is characterised in that including：

One of pitch variable bearings (13), the blade and wheel hub of inner ring relative to wind-driven generator of the pitch variable bearings (13) are solid Fixed, outer ring is fixed relative to the other of blade and wheel hub；

Mounting ring (12), is fixed on one of the outer ring of the pitch variable bearings (13) and inner ring, and in the mounting ring (12) circumference inner side is formed with flange connector (121)；

Web (14), it is fixed with the other of the outer ring of the pitch variable bearings (13) and inner ring；

Hydraulic-driven component (15), on the web (14) and the mounting ring (12),

Wherein, the pitch variable bearings (13), the mounting ring (12), the web (14) and the hydraulic-driven component (15) dress Assembling module is made into, the assembling module is mounted on the wheel hub (11).

2. hydraulic variable propeller system according to claim 1, it is characterised in that the hydraulic-driven component (15) is including oil cylinder (151) and accumulator (152), one end of the oil cylinder (151) is connected to the flange connector (121), and the other end is connected to institute Web (14) is stated, the accumulator (152) is in the mounting ring (12).

3. hydraulic variable propeller system according to claim 1, it is characterised in that the inner ring of the pitch variable bearings (13) relative to Blade is fixed, and outer ring is fixed relative to wheel hub, and mounting ring (12) is fixed on the outer ring of the pitch variable bearings (13), web (14) Inner ring with the pitch variable bearings (13) is fixed.

4. hydraulic variable propeller system according to claim 3, it is characterised in that the assembling module is by through the change oar The fastening bolt of the outer ring, the mounting ring (12) and the wheel hub (11) of bearing (13) is assembled on the wheel hub (11).

5. hydraulic variable propeller system according to claim 3, it is characterised in that the mounting ring (12) is bolted The outer ring of the pitch variable bearings (13).

6. a kind of wind power generating set, it is characterised in that including wheel hub (11), being connected on the wheel hub (11) will just like right Seek the hydraulic variable propeller system any one of 1 to 5.

7. wind power generating set according to claim 6, it is characterised in that the wind power generating set includes assembling simultaneously Three groups of hydraulic variable propeller systems, be respectively used to the change oar of three blades of wind power generating set.