CN214118394U

CN214118394U - Fixing device for wind channel heater in fan blade deicing prevention and removal system

Info

Publication number: CN214118394U
Application number: CN202022960319.2U
Authority: CN
Inventors: 文飞; 陈光荣; 舒禹; 刘小春; 王昭力; 杨东升; 李伟
Original assignee: Datang Guizhou New Energy Development Co ltd; Guizhou Institute of Technology
Current assignee: Datang Guizhou New Energy Development Co ltd; Guizhou Institute of Technology
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-09-03
Anticipated expiration: 2030-12-11

Abstract

The utility model discloses a fixing device for a fan blade anti-icing and deicing system wind channel heater, which comprises a PVC fixing base, an opening rectangular support frame and a fixing baffle plate, wherein the PVC fixing base is vertical to a shearing web plate, and a gap between the end surface of the PVC fixing base and the surface of a fan blade is filled and fixed by structural adhesive; at least two rectangular opening support frames are arranged in parallel and at intervals along the length direction of the PVC fixed base, the upper ends of the rectangular opening support frames are arc-shaped support surfaces, and the arc-shaped support surfaces are connected with the surface of the air duct heater; the fixed baffle is a flat plate and is placed along the tangential direction of the surface of the air duct heater, one end of the fixed baffle is connected with the shearing web plate, and the other end of the fixed baffle is connected with the surface of the fan blade. The utility model discloses a fixing device and the installation procedure of wind channel heater installation in the blade root can guarantee smooth construction operation and good equipment fixing quality.

Description

Fixing device for wind channel heater in fan blade deicing prevention and removal system

Technical Field

The utility model belongs to the technical field of fan anti-icing deicing, especially a be applied to fixing device of wind channel heater among current 2MW fan combined material blade gas thermal method anti-icing deicing system.

Background

In the areas of Yunobi plateau, Hunan, Sichuan and the like in China, wind power development becomes one of the main ways for promoting the development and utilization of new energy in the areas. However, under these special geographic environments and climatic conditions, such as karst complex terrain, moisture freezing, and remarkable microclimate characteristics, the surface of a fan blade in operation is prone to icing and icing, which causes adverse effects such as reduced fan output, unbalanced blade rotation and vibration, and in extreme cases, the fan may be overloaded during operation and may cause accidents such as collapse, blade fracture, ice-throwing damage, and the like, so wind farm operators often adopt fan shutdown to deal with the accidents in the winter icing period every year, and in recent 5 years, research and statistics of wind farms in Guizhou areas show that the accumulation of the winter icing period can reach more than 30 days, which causes serious waste of wind resources and a certain degree of decline of wind farm operation performance, and improving the environmental adaptability of the fan in the winter icing period in these areas becomes a common technical problem in these areas.

At present, the fan blade deicing method proposed at home and abroad mainly comprises various forms of mechanical deicing, ultrasonic deicing, paint deicing, heat deicing and the like, wherein the heat deicing is divided into electric heating deicing and gas heating deicing. The gas-heating deicing method has the advantages of easy realization of reconstruction on site, convenient maintenance, no increase of lightning triggering risk and the like, and is gradually paid attention to the industry, and the basic scheme is as follows: the customized air duct heater is arranged at the blade root part on the front edge side of the blade, air is heated and then conveyed to the middle upper part (more than 15 m) of the front edge of the blade by an air blower to continuously heat the composite material blade, so that the surface temperature of the blade in the icing period in winter is more than 0 ℃ to achieve the aim of preventing and removing ice.

A particularly important or critical link for the field reconstruction and installation of the fan blade air-heating method ice prevention and removal system is the fixed installation of an air duct heater. In the similar patent, a method for modularized air-heat anti-icing of the blade of the high-power wind driven generator and an installation method (CN201410461139.6) are provided with an installation support (the support comprises a special support for a blower, a heater support and an electric box support, and the installation method is that when the blade is newly produced, the special support for the blower, the heater support and the electric box support are fixed in an inner cavity of the root part of the blade by adopting a pre-embedding process, and the special support for the blower, the heater support and the electric box support are fixed in the inner cavity of the root part of the blade by adopting a hand pasting and bonding process on the hung blade), and an installation method (installing a heater, namely installing the heater on the heater support through bolts and connecting an air outlet of the heater and an air duct by a corrugated connecting pipe), and for a general installation operation explanation, the installation of a core device of the system of the heater is not specially designed, or potential hazards possibly existing in the installation of the heater device are not recognized.

A custom 30kW duct heater, taking into account the transport space constraints from the fan nacelle to the blade root mounting location, is a cylindrical object 80cm in length, 45cm in outside diameter and weighing approximately 350 kg. The fan blade in operation has rotation in different directions and certain degree vibration, in addition, the peripheral combined material (blade inner wall and shear web) and the local installation space restriction of blade root position heater mounted position lead to wind channel heater installation fixed to be different from general conventional equipment, only through special installation design with fixed, just can guarantee that wind channel heater can not produce the latent hidden danger that slides and squint or even drop when the blade moves.

Disclosure of Invention

The utility model aims to solve the technical problem that a fixing device that is arranged in 2MW fan combined material blade gas hot method deicing system pipe heater is provided.

To wind channel heater size and cylindrical appearance, the utility model discloses an installation fixing device for wind channel heater in blade, including wind channel heater half rectangle support frame, unable adjustment base and inclined supporting board, can be fast when high altitude construction in the blade on construction operation and maintenance dismantlement basis conveniently, can guarantee that the wind channel heater installation is firm, be unlikely to produce wind channel heater slip skew or the danger of droing when long-term operation.

Meanwhile, the installation method of the fixing device of the air duct heater is provided aiming at the fixing device, the installation and fixing procedures and the installation auxiliary materials of the air duct heater can be guaranteed, the complete construction operation and the good equipment installation quality are facilitated, and the fixing device is suitable for popularization and application of similar projects.

The utility model adopts the technical proposal that:

a fixing device for an air duct heater in a fan blade anti-icing and deicing system is used for fixing the air duct heater, the air duct heater is arranged at the position of a blade root of a front edge channel of a fan blade and is tightly attached to the wall surface of the front edge of a shearing web plate, the fixing device comprises,

the PVC fixing base is perpendicular to the shearing web plate, and a gap is formed between the end face of the PVC fixing base and the surface of the fan blade;

the PVC fixing base comprises at least two opening rectangular supporting frames, wherein the at least two opening rectangular supporting frames are arranged in parallel and at intervals along the length direction of the PVC fixing base;

the fixed baffle is a flat plate and is arranged along the tangential direction of the surface of the air duct heater, one end of the fixed baffle is connected with the shearing web plate, and the other end of the fixed baffle is connected with the surface of the fan blade;

and the structural adhesive is filled in a gap between the end face of the PVC fixed base and the surface of the fan blade.

Further, opening rectangle support frame includes the equilateral angle steel of arc, steel sheet and fixing bolt, and wherein the equilateral angle steel of arc is connected perpendicularly on the steel sheet surface, and an edge of the equilateral angle steel of arc is cuted there is the arc holding surface, and it has the through-hole to open on the steel sheet, can dismantle in the through-hole and be connected with fixing bolt.

Furthermore, there are two arc-shaped equal-edge angle steels, and the distance between the two arc-shaped equal-edge angle steels is equal to the outer diameter of the air duct heater.

Further, the height of the arc-shaped equilateral angle steel is equal to half of the outer diameter of the air duct heater.

Furthermore, the air duct heater is welded with the arc-shaped supporting surface of the opening rectangular supporting frame.

Furthermore, the fixed baffle is bonded with the shear web and the fan blade through structural adhesives.

Furthermore, the clearance between the two sides of the tangent position of the fixed baffle and the air duct heater is provided with a fixed clamping strip, and the fixed clamping strip is connected between the fixed baffle and the air duct heater through structural adhesive.

Furthermore, a fixing clamping strip is arranged at a gap between the air duct heater and the shearing web plate, and the fixing clamping strip is connected between the air duct heater and the shearing web plate through structural adhesive.

Compared with the prior art, adopt the utility model discloses a fixing device, air channel heater are by fixed mounting in shearing the web outside, in the fixed space of "triangle-shaped" that fixed stop and opening rectangle support frame formed, can fine restriction in the rotatory in-process air channel heater of fan blade probably produce the slip skew in each side, avoid this kind of latent hidden danger.

The utility model discloses can guarantee air duct heater's installation stationary procedure, also can guarantee simultaneously that the installation assists the material and is favorable to complete construction operation and good equipment fixing quality, be applicable to popularization and application in similar engineering.

Drawings

FIG. 1 is a schematic view of a part of the structure of the installation position of an air duct heater used in a 2WM fan blade air-heating method ice-preventing and deicing system of the utility model;

FIG. 2 is a schematic structural view of a semi-rectangular support frame of a duct heater in a 2WM fan blade air-heating method ice-preventing and deicing system of the utility model;

FIG. 3 is a schematic view of the structure of the combined part of the duct heater and the two-half rectangular support frame in the 2WM fan blade air-heating method ice-preventing and deicing system of the utility model;

FIG. 4 is a schematic view of the complete structure of the installation section of the duct heater in the 2WM fan blade air-heating method ice-preventing and deicing system of the present invention;

in the figure: 1-a fan blade; 2-shearing the web; 3-air duct heater; 4-a wind guide pipe; 5-arc equilateral angle steel; 6-steel plate; 7-fixing the bolt; 8-an open rectangular support frame; 9-PVC fixed base; 10-fixing a baffle plate; 11-structural adhesive and 12-fixing clamping strips.

Detailed Description

The following description of the present invention will be made with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the present invention is limited to the following embodiments, and various modifications, substitutions and changes made according to the ordinary technical knowledge and conventional means in the art without departing from the technical spirit of the present invention are included in the scope of the present invention.

As shown in fig. 1 to 4, the present embodiment provides a fixing device and an installation method for a duct heater in a 2WM fan blade air-thermal anti-icing and de-icing system.

A be used for 2WM fan blade gas thermal method anti-icing deicing system in wind channel heater fixing device, includes two parts of opening rectangle support frame 8 and fixed stop 10:

the utility model discloses well wind channel heater fixing device's technical scheme is: as shown in FIG. 1, an air duct heater 3 is arranged at the position of a blade root of a channel at the front edge of a fan blade 1 and clings to the wall surface of the front edge of a shear web 2, and the outlet of the air duct heater is connected with an air guide pipe 4. In order to prevent the air duct heater 2 from sliding and deviating during the rotation of the blades, a semi-rectangular support plate is first designed as shown in fig. 2, and the air duct heater 3 is fixed on the inner wall of the fan blade 1.

In the lower half part of the inner wall of the fan blade 1 close to the air duct heater 3, an equilateral angle specification not less than 70mm x 8mm (namely the external shape area and the thickness are not less than the specification) is selected, one side of the air duct heater is cut to match the arc shape of the air duct heater 3 to be made into an arc-shaped equilateral angle 5, a steel plate 6 with a proper length is selected (the steel plate 6 and the arc-shaped equilateral angle 5 have the same width and the same thickness), the steel plate 6 is welded with the arc-shaped equilateral angle 5 to be finally made into an opening rectangular support frame 8, the air duct heater 3 is ensured to be internally tangent between the arc-shaped equilateral angle 5 and the steel plate 6, bolt holes are made at proper positions at two ends of the steel plate 6 to be used as fixing bolts 7 for installing the air duct heater 3, and the opening rectangular support frame 8 is made by welding.

In this example, two rectangular open supporting frames 8 (for example, 10cm from the left and right ends) are installed at appropriate positions along the direction of the air duct heater 3, and are both installed on the basis of the PVC fixing base 7 by using the fixing bolts 7, and the thickness of the PVC fixing base 7 is not less than 1.5 cm.

As shown in fig. 4, at the positions of two 2 open rectangular supports 8, a fixing baffle 10 is made of high-quality dry wood or PVC plate with the cross section not less than 100 × 40, the length of the fixing baffle is selected to ensure that the fixing baffle 10 is externally tangent to the air duct heater 3, two ends of the fixing baffle 10 are made into inclined planes to be in close contact with the shearing web 2 and the inner wall of the fan blade 1, and two end faces are fixed by adopting a structure to generate acting force facing the direction of the shearing web 2.

In summary, the air duct heater 3 is fixedly installed outside the shear web 2 and in a "triangular" fixing space formed by the fixing baffle 10 and the open rectangular support frame 8, so that the sliding deviation of the air duct heater in all directions possibly generated in the rotation process of the fan blade can be well limited, and the latent hidden trouble can be avoided.

The installation and construction of the fixing device of the air duct heater in the 2WM fan blade air-heating method ice-preventing and deicing system comprises the following steps:

A. preparing materials including angle steel, homogeneous steel plates, a PVC fixed base, a fixed baffle, a fixed bolt, structural adhesive, corresponding tools and the like;

B. opening rectangle support frame 8 welds in air duct heater 3 mounted position department: on the ground, 2 opening rectangular support frames 8 are manufactured and fixed on the air duct heaters 3 in a welding mode, the inner tangent points of each air duct heater 3 are connected in a welding mode, the air duct heaters 3 and the opening rectangular support frames 8 are ensured to be connected reliably and stably, and the step requires the assistance of manufacturers of the air duct heaters 3;

C. selecting a PVC plate with proper thickness to manufacture a PVC fixing base 9 for installation and fixation according to the positions and the sizes of 4 mounting bolt holes at the bottom of the air duct heater 3;

D. adjusting a fan blade 1 to be constructed to a proper horizontal position, abutting against a shear web 2, pre-arranging a fixing bolt 7 in a bolt hole of a PVC fixing base 9, arranging a nut on the bottom surface, wherein the length of the nut ensures that 2 fixing nuts are arranged, filling a gap between the PVC fixing base 9 and the fan blade 1 by adopting structural adhesive 11 to fix the PVC fixing base 9, and ensuring that the PVC fixing base 9 is vertical to two planes of the shear web 2 so as to facilitate the positioning of an air duct heater 3;

E. after the structural adhesive 11 is dried and stabilized under the PVC fixed base 9, the air duct heater 3 is placed on the structural adhesive, and is fixed by bolts at corresponding positions, and is necessarily fixed by double nuts;

F. fixing a third direction of the air duct heater 3 by adopting a fixed baffle 10 at the position of the open rectangular support frame 8;

G. and proper wood or plastic fixing clamping strips 12 are selected from the upper part and the lower part of contact lines between the air duct heater 3 and the shearing web 2 and between the air duct heater 3 and the fixed baffle 10, and are fixed by structural adhesive 11, so that the installation stability of the air duct heater 3 is enhanced.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications or substitutions do not depart from the scope of the present invention in its spirit.

Claims

1. The utility model provides a fixing device that is used for fan blade to prevent and remove wind channel heater in ice system for fixed wind channel heater (3), wind channel heater (3) are laid at the leading edge passageway blade root position of fan blade (1) and are hugged closely shear web (2) leading edge wall, its characterized in that: the fixing device comprises a fixing device and a fixing device,

a PVC fixing base (9), the PVC fixing base (9) being perpendicular to the shear web (2), and

a gap is reserved between the end surface of the PVC fixed base (9) and the surface of the fan blade (1);

the PVC fixing device comprises opening rectangular support frames (8), at least two opening rectangular support frames (8) are arranged in parallel and at intervals along the length direction of a PVC fixing base (9), the upper end of each opening rectangular support frame (8) is an arc-shaped support surface, and the arc-shaped support surfaces are connected with the surface of an air duct heater (3);

the fixed baffle (10) is a flat plate and is arranged along the tangential direction of the surface of the air duct heater (3), one end of the fixed baffle (10) is connected with the shearing web (2), and the other end of the fixed baffle is connected with the surface of the fan blade (1);

structural adhesive (11), wherein the structural adhesive (11) is filled in a gap between the end face of the PVC fixed base (9) and the surface of the fan blade (1).

2. A fixing device for a fan blade anti-icing system duct heater according to claim 1, characterised in that: opening rectangle support frame (8) include such as angle steel of arc (5), steel sheet (6) and fixing bolt (7), and wherein angle steel (5) such as arc are connected perpendicularly on steel sheet (6) surface, and the edge of angle steel (5) such as arc is cuted there is the arc holding surface, and it has the through-hole to open on steel sheet (6), can dismantle in the through-hole and be connected with fixing bolt (7).

3. A mounting apparatus for a fan blade anti-icing system duct heater according to claim 2, characterised in that: the number of the arc-shaped equilateral angle steels (5) is two, and the distance between the two arc-shaped equilateral angle steels (5) is equal to the outer diameter of the air duct heater (3).

4. A mounting apparatus for a fan blade anti-icing system duct heater according to claim 2, characterised in that: the height of the arc equilateral angle steel (5) is equal to half of the outer diameter of the air duct heater (3).

5. A fixing device for a fan blade anti-icing system duct heater according to claim 1, characterised in that: the air duct heater (3) is welded with the arc-shaped supporting surface of the opening rectangular supporting frame (8).

6. A fixing device for a fan blade anti-icing system duct heater according to claim 1, characterised in that: the fixed baffle (10) is bonded with the shear web (2) and the fan blade (1) through structural adhesive (11).

7. A fixing device for a fan blade anti-icing system duct heater according to claim 1, characterised in that: the fixed baffle (10) and the air duct heater (3) are tangent to each other, a fixed clamping strip (12) is arranged in a gap between the two sides of the tangent position, and the fixed clamping strip (12) is connected between the fixed baffle (10) and the air duct heater (3) through structural adhesive (11).

8. A fixing device for a fan blade anti-icing system duct heater according to claim 1, characterised in that: the gap between the air duct heater (3) and the shearing web plate (2) is provided with a fixing clamping strip (12), and the fixing clamping strip (12) is connected between the air duct heater (3) and the shearing web plate (2) through a structural adhesive (11).