CN213627852U

CN213627852U - Pitch-changing driving device of small and medium-sized wind generating set

Info

Publication number: CN213627852U
Application number: CN202022248159.9U
Authority: CN
Inventors: 崔新维; 崔逸南
Original assignee: Beijing Sanli Xinneng Science & Technology Co ltd
Current assignee: Suzhou xinsanli Wind Power Technology Co.,Ltd.
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-07-06
Anticipated expiration: 2030-10-12

Abstract

The utility model discloses a middle-size and small-size wind generating set's becomes oar drive arrangement. Wherein, a variable pitch driving unit is arranged in the hub or the main shaft and comprises a variable pitch driving motor and a speed reducer. The output bevel gear of the variable pitch driving unit divides the variable pitch driving force, and power is transmitted to the toothed inner ring of the variable pitch bearing of each blade through transmission of a plurality of groups of bevel gears, variable pitch driving shafts and cylindrical gears to realize variable pitch action. The utility model discloses a scheme utilize one set of oar drive unit to realize the change oar action of a plurality of blades, and synchronous completely. The scheme can be directly matched with the traditional blade for use, the structure involved in the scheme is simple, and the reliability is improved while the cost of the variable pitch system is reduced.

Description

Pitch-changing driving device of small and medium-sized wind generating set

Technical Field

The utility model belongs to the technical field of wind power generation, a become oar drive arrangement for middle-size and small-size wind generating set is related to.

Background

In the modern wind power generation industry, the capacity of wind power generators is continuously increased to meet the requirement of controlling the electricity consumption cost. Meanwhile, the technology of small and medium-sized, even micro wind generating sets is also developing vigorously. Compared with a large-scale wind turbine generator, the installation condition of a small-scale wind turbine generator is looser. Like the emerging distributed power generation system, the wind energy as the renewable energy can be developed and utilized in large quantities and consumed on the spot.

Modern wind generating sets mostly adopt a variable speed operation-variable pitch power adjustment operation mode, and a variable pitch driving device is usually installed inside a hub. For small and medium-sized wind turbine generators, the size of the whole wind turbine generator is small, and a traditional mounting mode cannot be used for a variable pitch driving device. Therefore, most small and medium-sized units adopt a stall power regulation mode, and a variable pitch driving device is omitted. However, stall regulation adversely affects the power generation capacity, load level and safety of the unit. In order to solve the above problems, a pitch control driving device convenient to install inside a small and medium-sized wind generating set needs to be designed.

Patents CN 106968888B, CN 210714929U, CN 203035469U, CN 207048898U and CN 207229301U all disclose pitch-controlled mechanisms for medium-sized or small-sized wind-driven generators, and the pitch-controlled driving schemes involved in the patents are complex, which are not favorable for improving the reliability of the unit and reducing the cost.

CN 111594380 a discloses a design scheme of an impeller of a variable-pitch small wind turbine generator system, in which the pitch drive is driven by a bevel gear connected with the root of a blade, and this scheme is only suitable for small micro turbine generators with very small hub size, and the root of the blade needs extra processing operation, which reduces the economy of the turbine generator system.

Disclosure of Invention

The utility model aims at providing a can be used to middle-size and small-size wind generating set's change oar mechanism utilizes one set of drive arrangement to realize the change oar action of a plurality of blades.

The technical scheme for the variable pitch mechanism of the small and medium-sized wind generating set is as follows:

a variable pitch driving device of a small and medium-sized wind generating set only comprises a set of variable pitch driving unit, wherein the set of variable pitch driving unit comprises a variable pitch driving motor and a speed reducer, and the variable pitch driving unit is completely placed in a hub, or is completely placed in a main shaft, or is partially placed in the hub and is partially placed in the main shaft.

The main bevel gear at the output end of the variable pitch driving unit divides power, and the variable pitch driving force is transmitted to the toothed inner ring of the variable pitch bearing of each blade through the transmission of a plurality of groups of bevel gears, variable pitch driving shafts and cylindrical gears, so that variable pitch action is realized.

The bevel gear-variable pitch driving shaft-cylindrical gear unit comprises a driven bevel gear, a variable pitch driving shaft, a driving shaft bearing and cylindrical gears, wherein the number of the driven bevel gear, the variable pitch driving shaft, the driving shaft bearing and the cylindrical gears is consistent with the number of the blades and is mechanically connected with the hub.

The utility model has the advantages that: aiming at small and medium-sized wind generating sets, the utility model discloses a novel variable pitch driving device scheme, which overcomes the difficulty that the space of a unit hub is small and a plurality of variable pitch driving units cannot be arranged, and realizes the effect that one variable pitch driving unit drives a plurality of blades to synchronously change the pitch; the scheme relates to a simple structure, and the reliability is guaranteed.

Drawings

Specific embodiments will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic front view of a pitch drive device of a small and medium-sized wind generating set;

fig. 2 is a rotational cross-sectional view of fig. 1 (the cross-sectional axis is given in fig. 1).

In the figure, 1-a main shaft, 2-a hub, 3-a variable pitch driving unit, 4-a driving bevel gear, 5-a driven bevel gear, 6-a variable pitch driving shaft, 7-a variable pitch driving shaft bearing, 8-a cylindrical gear and 9-a variable pitch bearing are provided with a toothed inner ring.

Detailed Description

The drawings are intended to depict only typical features of the invention, and are not intended to show any actual construction or to reflect the details of size, relative proportions, etc. of the various components. In order to more clearly illustrate the principles of the present invention and to avoid obscuring the same in unnecessary detail, the examples in the drawings have been simplified. These illustrations do not represent an inconvenience to a person skilled in the relevant art (wind power generation) in understanding the present invention, and the actual pitch drive may comprise more components.

The utility model discloses a specific implementation scheme be:

as shown in fig. 1 and 2, the pitch driving device of the small and medium-sized wind generating set only comprises a set of pitch driving unit (3), which comprises a pitch driving motor and a speed reducer. According to the actual requirements of the unit, the variable pitch driving unit can be completely placed in the main shaft (1), can also be completely placed in the hub (2), can also be partially placed in the main shaft (1), and can be partially placed in the hub (2).

The output end of the variable pitch driving unit is provided with a driving bevel gear (4). The bevel gears divide power, and pitch driving force is transmitted to the toothed inner ring (9) of the pitch bearing of each blade through transmission of a plurality of groups of bevel gears, pitch driving shafts and cylindrical gears, so that pitch action is realized.

The bevel gear-variable pitch driving shaft-cylindrical gear unit comprises a driven bevel gear (5), a variable pitch driving shaft (6), a driving shaft bearing (7) and a cylindrical gear (8). Each blade is equipped with a set of bevel-pitch drive shaft-cylindrical gear units, each unit forming a mechanical coupling with the hub (2).

The scheme utilizes one set of variable pitch driving motor to realize variable pitch actions of a plurality of blades, the blade driving shaft used in the scheme realizes a transmission function, an oversize bevel gear is avoided, and the cost of the system is effectively controlled.

Claims

1. A pitch control driving device of a small and medium-sized wind generating set is characterized in that: the device comprises a set of variable pitch driving unit and a plurality of sets of bevel gears, variable pitch driving shafts and cylindrical gear units, wherein the variable pitch driving unit comprises a variable pitch driving motor and a speed reducer, and is completely placed in a hub, or completely placed in a main shaft, or partially placed in the hub and partially placed in the main shaft; the bevel gear-variable pitch drive shaft-cylindrical gear unit is placed in the hub, and transmission of variable pitch drive force is achieved.

2. The variable pitch driving device of the small and medium-sized wind generating set according to claim 1, which is characterized in that: the variable pitch driving unit outputs a bevel gear to split power, and variable pitch driving force is transmitted to the toothed inner ring of the variable pitch bearing of each blade through transmission of a plurality of groups of bevel gears, variable pitch driving shafts and cylindrical gears, so that variable pitch action is realized.

3. The variable pitch driving device of the small and medium-sized wind generating set according to claim 1, which is characterized in that: the bevel gear-variable pitch driving shaft-cylindrical gear unit comprises a driven bevel gear, a variable pitch driving shaft, a driving shaft bearing and cylindrical gears, wherein the number of the driven bevel gear, the variable pitch driving shaft, the driving shaft bearing and the cylindrical gears is consistent with the number of the blades and is mechanically connected with the hub.