CN213478561U

CN213478561U - Composite blade

Info

Publication number: CN213478561U
Application number: CN202022500299.0U
Authority: CN
Inventors: 葛文星
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-06-18
Anticipated expiration: 2030-10-30

Abstract

The utility model relates to the technical field of blade design, and provides a composite blade, which comprises a rotating shaft, wherein a plurality of blade groups are circumferentially arranged on the rotating shaft, and each blade group comprises a main blade and an auxiliary blade which are relatively fixed; the main blade and the auxiliary blade of the same blade group of each blade group are simultaneously cut by the same axial plane or the same plane vertical to the axial line to form a channel between two sections, which is a variable diameter channel. Has the advantages that: the auxiliary blade and the main blade of each blade group form a narrow pipe effect from large to small relative to the rotating shaft, and the effect of increasing the wind speed is achieved, so that the composite blade can effectively utilize the weak breeze.

Description

Composite blade

Technical Field

The utility model relates to a blade design technical field, in particular to composite blade.

Background

The blade is the part that wind power generation system used commonly, and current wind power generation blade is mostly vertical axis blade or horizontal axis blade, rotates by the blade atress and drives the rotation axis rotation, and then does work and generate electricity. Because the load of a power generation system is usually larger, the windward side of the existing single-blade structure can rotate when the wind is strong, but under the condition of breeze, the windward side does not rotate, so that equipment is idle, and resources cannot be effectively utilized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a composite blade to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a composite blade comprises a rotating shaft, wherein a plurality of blade groups are circumferentially arranged on the rotating shaft, and each blade group comprises a main blade and an auxiliary blade which are relatively fixed; the main blade and the auxiliary blade of each blade group are simultaneously cut by the same axial plane or the same plane vertical to the axial line to form a channel between two sections, which is a variable diameter channel.

Preferably, the main blade and the auxiliary blade of each blade group are simultaneously cut by the same axial plane to form two cross sections, and the channel distance between the two cross sections close to the rotating shaft side is smaller than the channel distance between the two cross sections far away from the rotating shaft side; or the main blade and the auxiliary blade of each blade group are simultaneously cut by the same plane vertical to the axis to form two sections, and the channel spacing between the two sections close to the rotating shaft side is smaller than the channel spacing between the two sections far away from the rotating shaft side.

Preferably, there is at least one secondary vane per vane group.

Preferably, the relative fixed relationship of the primary and secondary blades is by at least one bracket fixed connection.

Has the advantages that: 1. the stress area is increased, and the driving force is improved; 2. the auxiliary blade and the main blade of each blade group form a narrow pipe effect from large to small relative to the rotating shaft, and the effect of increasing the wind speed is achieved, so that the composite blade can effectively utilize the weak breeze.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a plan sectional view of the vertical axis of fig. 1.

Fig. 3 is a schematic structural view of embodiment 2 of the present invention.

Fig. 4 is a schematic structural view of embodiment 3 of the present invention.

Fig. 5 is a sectional view of the axial plane a-a of fig. 4.

Detailed Description

The present invention will be described in further detail with reference to the following description of embodiments thereof, which is made for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.

Example 1

Referring to fig. 1-2, a composite blade includes a rotating shaft 1, four blade sets 2 are circumferentially disposed on the rotating shaft, and each blade set includes a main blade 3 and an auxiliary blade 4 which are relatively fixed; the main blade and the auxiliary blade of each blade group are simultaneously cut by the plane 5 of the same vertical axis to form two sections, and the channel distance D between the two sections close to the rotating shaft side is smaller than the channel distance D between the two sections far away from the rotating shaft side.

Example 2

Referring to fig. 3, a composite blade includes a rotating shaft 1, four blade sets 2 are circumferentially disposed on the rotating shaft, and each blade set includes a main blade 3 and an auxiliary blade 4 which are relatively fixed; the main blade and the auxiliary blade of each blade group are simultaneously cut by the plane 5 of the same vertical axis to form two sections, and the channel distance D between the two sections close to the rotating shaft side is smaller than the channel distance D between the two sections far away from the rotating shaft side.

Example 3

Referring to fig. 4 and 5, the composite blade comprises a rotating shaft 1, four blade groups 2 are circumferentially arranged on the rotating shaft, and each blade group comprises a main blade 3 and two auxiliary blades (401, 402); the main blade 3 and the auxiliary blade 401 of each blade group are simultaneously cut by the same axial plane to form two sections, and the distance D1 between the two sections close to the rotating shaft side is smaller than the distance D1 between the two sections far away from the rotating shaft side; the main blade 3 and the auxiliary blade 402 of each blade group are simultaneously cut by the same axial plane to form two sections, and the channel spacing D2 between the two sections close to the rotating shaft side is smaller than the channel spacing D2 between the two sections far from the rotating shaft side.

The present invention has been described above with reference to the accompanying drawings, as long as it is a variety of insubstantial improvements made by using the method concept and technical solutions of the present invention; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.

Claims

1. A composite blade comprising a rotating shaft, characterized in that: a plurality of blade groups are circumferentially arranged on the rotating shaft, and each blade group comprises a main blade and an auxiliary blade which are relatively fixed; the main blade and the auxiliary blade of each blade group are simultaneously cut by the same axial plane or the same plane vertical to the axial line to form a channel between two sections, which is a variable diameter channel.

2. A composite blade according to claim 1, wherein: the main blade and the auxiliary blade of each blade group are simultaneously cut by the same axial plane to form two sections, and the channel distance between the two sections close to the rotating shaft side is smaller than the channel distance between the two sections far away from the rotating shaft side; or the main blade and the auxiliary blade of each blade group are simultaneously cut by the same plane vertical to the axis to form two sections, and the channel spacing between the two sections close to the rotating shaft side is smaller than the channel spacing between the two sections far away from the rotating shaft side.

3. A composite blade according to claim 1 or 2, wherein: at least one secondary blade of each blade group.

4. A composite blade according to claim 3, wherein: the relative fixed relation of the main blade and the auxiliary blade is that the main blade and the auxiliary blade are fixedly connected through at least one bracket.