Wind driven generator fan blade structure with ice melting and frost resisting functions

Abstract

The utility model belongs to the technical field of wind power generation equipment, and discloses a wind driven generator fan blade structure with ice melting and frost resisting functions. Comprising blades, and a friction heat generation assembly is arranged in an inner cavity of each blade; the friction heat generation assembly comprises a friction sleeve extending along the center line of the blade, and a rolling friction ball is arranged in the friction sleeve. Heat-conducting fins are arranged on the two sides of the friction sleeve; one group of heat-conducting fins are attached to the windward side of the contact blade, and the other group of heat-conducting fins are attached to the leeward side of the contact blade; a rebounding device is arranged in the friction sleeve, and the rebounding device is mounted at one end, far away from the tower, in the blade; according to the friction heat generation assembly, the friction balls roll back and forth in the friction sleeve by combining the centrifugal force generated when the blades rotate and the bounce generated by the bouncer, the phenomenon that the surfaces of the blade bodies are coated with ice is remarkably reduced, the heat conduction efficiency is improved through the arrangement positions of the heat conduction pieces, and the heat conduction efficiency is improved. And melting of frost layers on the windward side and the leeward side of the blade is accelerated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wind power generation equipment, concretely is a fan blade structure of wind driven generator with ice melting and frost resisting function. BACKGROUND

[0002] The wind driven generator is the electric power equipment that wind energy is converted into mechanical work, mechanical work drives rotor rotation, and finally outputs alternating current. The wind driven generator generally has wind wheel, generator (including device), direction adjuster (tail wing), tower, speed limiting safety mechanism and energy storage device etc. component composition. The working principle of wind driven generator is relatively simple, the wind wheel rotates under the action of wind force, it changes wind's kinetic energy into the mechanical energy of wind wheel axle, the generator rotates under the driving of wind wheel axle and generates electricity.

[0003] When the wind power generation equipment is used in cold weather, frost or ice is easy to form on the blade, and the ice on the blade surface often causes turbine unit vibration or power factor distortion and endangers unit operation, so the unit must be stopped after icing, which causes a large amount of power generation loss to the wind farm.

[0004] The existing deicing of wind driven generator unit blade is mainly realized by adding heating elements inside or outside the blade to heat the blade, generally having air heating, electric heating etc. technical route. But whether the air heating or the electric heating deicing system needs complex circuit system, and needs additional energy consumption, which is not conducive to popularization and dissemination. UTILITY MODEL CONTENTS

[0005] The utility model overcomes the insufficient of prior art, proposes a fan blade structure of wind driven generator with ice melting and frost resisting function, solves the defects existing in the current deicing of wind driven generator unit blade through air heating or electric heating system.

[0006] In order to achieve the above purpose, the utility model is realized through the following technical schemes:

[0007] A fan blade structure of wind driven generator with ice melting and frost resisting function, including blade, a group of friction heat generating components are arranged in the inner cavity of each blade;The friction heat generating component includes the friction sleeve extending along the center line of the blade, the friction ball rolling in the friction sleeve;The heat conduction sheet is arranged on both sides of the friction sleeve;One group of heat conduction sheets are attached to the windward surface of the blade, and the other group of heat conduction sheets are attached to the leeward surface of the blade;The rebounder is arranged in the friction sleeve, and the rebounder is installed at one end of the blade away from the tower;The rebounder includes the fixed seat, the rebound contact end and the elastic air bag;The fixed seat and the rebound contact end are connected through the elastic air bag, the rebounder is fixedly connected with the end of the friction sleeve through the fixed seat, and the rebound contact end is intermittently contacted with the friction ball.

[0008] Further, the heat-conducting sheet comprises a ring-shaped heat-conducting strip arranged along the edge of the inner cavity of the blade, and a plurality of intermediate heat-conducting strips are arranged in the ring-shaped heat-conducting strip in a spaced manner, and the middle part of the intermediate heat-conducting strips is connected with the friction sleeve, and the two ends of the intermediate heat-conducting strips are connected with the long side of the ring-shaped heat-conducting strip.

[0009] Further, a plurality of heat gathering points are uniformly arranged on the ring-shaped heat-conducting strip and the intermediate heat-conducting strips.

[0010] Further, a friction layer is additionally arranged on the contact surface between the inner part of the friction sleeve and the friction ball.

[0011] Further, the rebounder is additionally provided with a spring, one end of the spring is connected with the fixed seat, and the other end is connected with the rebounding contact end.

[0012] The beneficial effects of the utility model relative to the prior art are as follows:

[0013] The friction heat generating assembly combines the centrifugal force when the blade rotates and the rebounding force generated by the rebounder, realizes the reciprocating rolling of the friction ball in the friction sleeve, realizes the friction heat generation through the rolling friction between the friction ball and the friction sleeve, accelerates the ice and frost melting efficiency of the surface of the blade body, significantly reduces the icing phenomenon of the surface of the blade body, and guarantees the safe use of the blade body; meanwhile, the rebounder has a simple structure and is not easy to be damaged.

[0014] The two groups of heat-conducting sheets of the friction heat generating assembly are in contact with the windward surface of the blade and the leeward surface of the blade, respectively, and the heat-conducting sheet is composed of the ring-shaped heat-conducting strip and the plurality of intermediate heat-conducting strips, so that the heat conduction efficiency can be improved, and the melting of the ice and frost layers of the windward surface and the leeward surface of the blade can be accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the external structure schematic view of the wind turbine blade with the ice melting and frost resisting function;

[0016] Figure 2 is the structure schematic view of the friction heat generating assembly;

[0017] Figure 3 is the plan view of the friction heat generating assembly;

[0018] Figure 4 is the structure schematic view of the heat-conducting sheet;

[0019] Figure 5 is the sectional view of the rebounder.

[0020] In the drawings:

[0021] 1 blade; 2 friction sleeve; 3 friction ball; 4 heat conduction sheet; 5 annular heat conduction strip; 6 intermediate heat conduction strip; 7 heat gathering point; 8 rebounder; 9 fixing base; 10 rebound contact end; 11 elastic air bag; 12 spring. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved more clearly, the utility model is further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model. The technical solutions of the utility model are described in detail below in combination with embodiments and drawings, but the protection scope is not limited thereby.

[0023] Referring to Figures 1 to 5 The embodiment provides a fan blade structure of a wind driven generator with ice melting and frost resisting functions, which comprises blades 1 and friction heat generating assemblies. A set of friction heat generating assemblies is arranged in the inner cavity of each blade 1.

[0024] The friction heat generating assembly comprises a friction sleeve 2 extending along the center line of the blade 1, a friction ball 3 arranged in the friction sleeve 2, and the friction ball 3 can move back and forth in the friction sleeve 2. Heat is generated by the rolling friction of the friction ball 3 in the friction sleeve 2. Heat conduction sheets 4 are arranged on both sides of the friction sleeve 2. One set of heat conduction sheets 4 is attached to the windward surface of the blade 1, and the other set of heat conduction sheets 4 is attached to the leeward surface of the blade 1. The heat of the friction sleeve 2 is conducted to the windward surface and the leeward surface of the blade 1 through the heat conduction sheets 4, so as to melt the frost layer and the ice layer on the surface of the blade 1.

[0025] Figure 4 The structure of the heat conduction sheet 4 is shown in FIG. 4. The heat conduction sheet 4 comprises an annular heat conduction strip 5 arranged along the edge of the inner cavity of the blade 1. The annular heat conduction strip 5 can conduct the heat of the friction sleeve 2 to the edge of the windward surface and the leeward surface of the blade 1, so as to melt the frost layer and the ice layer on the surface of the blade 1.

[0026] A plurality of intermediate heat conduction strips 6 are arranged in the annular heat conduction strip 5 at intervals, and the middle part of the plurality of intermediate heat conduction strips 6 is connected to the friction sleeve 2, and the two ends of the intermediate heat conduction strip 6 are connected to the long edges of the annular heat conduction strip 5.

[0027] In the embodiment, the plurality of intermediate heat conduction strips 6 can improve the heat conduction efficiency and accelerate the melting of the frost layer and the ice layer on the surface of the blade 1.

[0028] Further, the annular heat-conducting strip 5 and the intermediate heat-conducting strip 6 are uniformly provided with a plurality of heat gathering points 7, which gather the heat on the heat-conducting strip, melt the frost and ice layer on the surface of the blade 1 at the fixed point, and under the action of the centrifugal force of the blade 1, the ice layer is thrown and separated from the blade. The structure of the heat gathering point 7 is the existing structure, and in the embodiment, the heat gathering point 7 adopts a magnet, which uses the heating principle of the magnet to strengthen the heat transfer.

[0029] In the embodiment, a friction layer is additionally arranged on the contact surface between the inside of the friction sleeve 2 and the friction ball 3, which can enhance the rolling friction of the friction ball 3, thereby generating more friction heat.

[0030] Figure 5 is a sectional view of the rebounder 8, which is arranged in the friction sleeve 2 and is installed at the end of the blade 1 away from the tower.

[0031] Further, the rebounder 8 includes a fixed seat 9, a rebound contact end 10 and an elastic air bag 11; the fixed seat 9 and the rebound contact end 10 are connected through the elastic air bag 11, the rebounder 8 is fixedly connected with the end of the friction sleeve 2 through the fixed seat 9, the rebound contact end 10 is in contact with the friction ball 3, and under the action of the centrifugal force and the elastic air bag 11, the friction ball 3 reciprocally rolls in the friction sleeve 2, thereby continuously generating friction heat.

[0032] Further, the rebounder 8 is further provided with a spring 12, one end of which is connected with the fixed seat 9 and the other end of which is connected with the rebound contact end 10; the rebound force is further enhanced on the basis of the elastic force of the elastic air bag 11, thereby increasing the rolling stroke of the friction ball 3 in the friction sleeve 2, thereby generating more friction heat.

[0033] The above is a further detailed description of the utility model in combination with the specific preferred embodiment, which cannot be regarded as the specific embodiment of the utility model being limited to this, and for the ordinary skilled in the art to which the utility model belongs, without departing from the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the utility model, and the scope of patent protection is determined by the submitted claims.

Claims

1. A wind turbine blade structure with ice-melting and frost-resistant functions, comprising a blade (1), characterized in that: A group of friction heat generating components is provided in the inner cavity of each blade (1); the friction heat generating components include a friction sleeve (2) extending along the center line of the blade (1), and a rolling friction ball (3) is provided in the friction sleeve (2); heat conducting plates (4) are provided on both sides of the friction sleeve (2); one group of heat conducting plates (4) is in contact with the windward side of the blade (1), and the other group of heat conducting plates (4) is in contact with the leeward side of the blade (1); a rebounder (8) is provided in the friction sleeve (2), and the rebounder (8) is installed at an end of the blade (1) away from the tower; the rebounder (8) includes a fixed seat (9), a rebound contact end (10) and an elastic airbag (11); the fixed seat (9) and the rebound contact end (10) are connected via the elastic airbag (11), and the rebounder (8) is fixedly connected to the end of the friction sleeve (2) via the fixed seat (9), and the rebound contact end (10) is in intermittent contact with the friction ball (3); The heat conducting sheet (4) includes an annular heat conducting strip (5), which is arranged in the inner cavity of the blade (1) along its edge, and a plurality of intermediate heat conducting strips (6) are arranged at intervals inside the annular heat conducting strip (5), and the middle parts of the plurality of intermediate heat conducting strips (6) are connected to the friction sleeve (2), and the two ends of the intermediate heat conducting strips (6) are connected to the long sides of the annular heat conducting strip (5); a plurality of heat convergence points (7) are evenly distributed on the annular heat conducting strip (5) and the intermediate heat conducting strip (6).

2. The wind turbine blade structure with ice melting and frost resistance function according to claim 1, characterized in that: A friction layer is added to the contact surface between the interior of the friction sleeve (2) and the friction ball (3).

3. The wind turbine blade structure with ice melting and anti-frost function according to claim 1, characterized in that: A spring (12) is further provided in the rebounder (8), one end of the spring (12) is connected to the fixed seat (9), and the other end is connected to the rebound contact end (10).

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