A fan blade icing monitoring device

Abstract

This utility model relates to the field of wind turbine blade monitoring technology and discloses a wind turbine blade icing monitoring device. The device includes a wind turbine housing, a base fixed inside the housing, a motor fixed on the base, a coupling fixed to the output end of the motor, and multiple wind turbine blade bodies fixed to the outer ring of the coupling. A monitoring component is mounted on the wind turbine housing, including a mounting bracket fixedly connected to the housing. A cavity is formed within the mounting bracket, and a contact plate is slidably mounted within the cavity. This utility model, through the synergistic action of the contact plate, sliding rod, spring, and pressure sensor, can capture pressure changes in the blades caused by icing thickening in real time, accurately reflecting the degree of icing. This ensures effective detection in the early stages of icing, allowing for timely monitoring and removal of ice layers on the blades, preventing blade failure due to icing thickening, reducing the failure rate, and extending the service life of the wind turbine.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine blade monitoring technology, specifically a wind turbine blade icing monitoring device. Background Technology

[0002] As the core component for energy conversion in wind turbines, the shape and operating status of wind turbine blades directly determine the performance of the turbine. When ice forms on the blade surface, the ice layer alters the original aerodynamic shape of the blades, damaging their aerodynamic performance. This can range from a significant decrease in wind turbine output power and a marked reduction in power generation efficiency to a severe shift in the blade's center of gravity due to uneven ice distribution, causing violent vibrations in the wind turbine. Therefore, real-time monitoring of icing conditions on wind turbine blades is of paramount importance.

[0003] Currently, traditional methods for monitoring blade icing mostly rely on manual inspections or simple temperature sensors. Manual inspections are limited by fixed inspection cycles and subjective judgment, often only being discovered when blade icing has reached a severe stage, failing to capture subtle changes in the early stages of icing. On the other hand, temperature sensors cannot directly determine the icing state, are prone to misjudgment, and cannot accurately reflect whether the blades are truly icy. If a timely response is not made, the ice layer will continue to thicken, leading to problems such as blade weight imbalance and increased rotational resistance. This not only increases the risk of excessive motor load and accelerated blade wear but also significantly increases the equipment failure rate, seriously affecting the service life of the wind turbine.

[0004] Therefore, we propose a wind turbine blade icing monitoring device to address the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a wind turbine blade icing monitoring device to solve the problem mentioned in the background art that existing monitoring devices cannot directly determine the icing state and cannot accurately reflect whether the blades are truly iced.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine blade icing monitoring device, comprising a wind turbine housing, a base fixed inside the wind turbine housing, a motor fixed on the base, a coupling fixed at the output end of the motor, a plurality of wind turbine blade bodies fixed on the outer ring of the coupling, a monitoring component provided on the wind turbine housing, the monitoring component including a mounting bracket fixedly connected to the wind turbine housing, a cavity opened in the mounting bracket, and a contact plate slidably installed in the cavity.

[0007] Preferably, a protective plate is fixed inside the fan housing, the coupling is rotatably connected to the protective plate, and a spiral heating wire is installed on the fan housing.

[0008] Preferably, a receiving column is fixed inside the cavity, a frustum is fixed at the end of the receiving column, a pressure sensor is installed on the inner wall of the receiving column, a sliding rod is slidably connected inside the frustum, and the sliding rod is fixedly connected to the contact plate.

[0009] Preferably, the receiving column is hollow, and the sliding rod slides inside the receiving column.

[0010] Preferably, a spring is sleeved on the outer ring of the slide rod, one end of the spring is fixedly connected to the side wall of the contact plate, and the other end of the slide rod is fixedly connected to the side wall of the receiving column.

[0011] Preferably, the pressure sensor is electrically connected to the spiral heating wire.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This device can accurately monitor the icing status of the blades. With the coordinated action of the contact plate, slide bar, spring and pressure sensor, it can capture the pressure changes caused by the thickening of ice on the blades in real time, accurately reflect the degree of icing, and ensure that it can be effectively detected in the early stage of icing. Timely monitoring and removal of ice on the blades can avoid problems such as blade weight imbalance and increased rotational resistance caused by thickened ice, reduce excessive motor load and accelerated blade wear, reduce equipment failure rate and extend the overall service life of the fan.

[0014] 2. This device can achieve automated de-icing. When the pressure signal exceeds the preset threshold, the control system automatically starts the spiral heating wire without manual operation, responding quickly to the icing situation. At the same time, the heat generated by the spiral heating wire is transferred to the blades through the fan casing, promoting uniform melting of the ice layer, ensuring the de-icing effect, and reducing the impact of icing on the operation of the fan.

[0015] 3. By controlling the start and stop of the spiral heating wire through the pressure threshold, heating is only started when the blades are iced to a certain extent, and stops immediately after the ice melts. This avoids the heating wire working continuously for no reason, greatly reduces energy consumption, meets the requirements of energy conservation and consumption reduction, and reduces labor costs and maintenance difficulty. It also reduces the need for manual inspection and manual de-icing, saving manpower. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of the wind turbine blades, motor, coupling, and monitoring components of this utility model;

[0019] Figure 4 This is a schematic diagram of the monitoring component structure of this utility model. Figure 1 ;

[0020] Figure 5 This is a schematic diagram of the monitoring component structure of this utility model. Figure 2 ;

[0021] Figure 6 For the present utility model Figure 5 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Fan housing; 2. Base; 3. Motor; 4. Protective plate; 5. Spiral heating wire; 6. Coupling; 7. Fan blade body; 8. Monitoring component; 81. Mounting bracket; 82. Cavity; 83. Receiving column; 84. Frustum; 85. Pressure sensor; 86. Slide rod; 87. Spring; 88. Contact plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figure 1 - Figure 6A wind turbine blade icing monitoring device includes a wind turbine housing 1 made of high-strength alloy material, which not only provides a stable mounting base for internal components but also has good wind resistance, rainproof, and corrosion resistance, adapting to various complex outdoor environments. Its streamlined shape effectively reduces air resistance and lowers energy consumption during wind turbine operation. A base 2 is fixed inside the wind turbine housing 1, and a motor 3 is fixed on the base 2. A coupling 6 is fixed to the output end of the motor 3, and multiple wind turbine blade bodies 7 are fixed to the outer ring of the coupling 6. The wind turbine blade bodies 7 are made of lightweight, high-strength composite materials, such as glass fiber reinforced resin. The blade shape is aerodynamically optimized to generate greater torque at the same wind speed, improving the wind turbine's power generation efficiency. A monitoring component 8 is installed on the wind turbine housing 1. The monitoring component 8 includes a mounting bracket 81 fixedly connected to the wind turbine housing 1. The mounting bracket 81 has a cavity 82, and the connection between the mounting bracket 81 and the wind turbine housing 1 is welded, ensuring a firm and reliable connection. The interior of cavity 82 is smoothed to reduce friction during the sliding of contact plate 88. Contact plate 88 is slidably mounted within cavity 82, and a receiving column 83 is fixed inside cavity 82. A frustum 84 is fixed to the end of the receiving column 83. A pressure sensor 85 is installed on the inner wall of the receiving column 83. The pressure sensor 85 is a strain gauge type, and its measurement range has been precisely calibrated to accurately detect minute pressure changes transmitted by sliding rod 86. The pressure sensor 85 is bonded to the inner wall of the receiving column 83 with special adhesive to ensure a tight connection and avoid measurement errors caused by vibration.

[0025] A sliding rod 86 is slidably connected inside a frustum 84. The frustum 84 guides the sliding of the sliding rod 86, ensuring the stability of its movement. The sliding rod 86 is fixedly connected to a contact plate 88, the shape of which matches the edge contour of the fan blade body 7. When the fan blade body 7 rotates, the blade edge maintains good contact with the contact plate 88. The contact plate 88 is made of wear-resistant material, such as high manganese steel, to cope with wear caused by long-term friction, but the specific material needs to be selected according to the actual situation. The receiving column 83 is hollow, and the sliding rod 86 slides inside it. A spring 87 is sleeved on the outer ring of the sliding rod 86. One end of the spring 87 is fixedly connected to the side wall of the contact plate 88. The elastic coefficient of the spring 87 is precisely calculated to ensure that the contact plate 88 maintains a stable position when not subjected to external force, and generates appropriate elastic force when compressed by the blade, ensuring that the pressure sensor 85 can accurately detect pressure changes. The other end of the sliding rod 86 is fixedly connected to the side wall of the receiving column 83.

[0026] A protective plate 4 is fixed inside the fan housing 1, and a coupling 6 is rotatably connected to the protective plate 4. A spiral heating wire 5 is installed on the fan housing 1, and a pressure sensor 85 is electrically connected to the spiral heating wire 5. The spiral heating wire 5 features high heating efficiency and long service life, and maintains a certain safe distance from the fan blade body 7 to avoid damage to the blades during heating. The power of the heating wire can be adjusted according to the fan model and actual needs.

[0027] In this embodiment: When the fan is running normally, the fan blade body 7 rotates at high speed under the drive of the motor 3. At this time, the edge of the fan blade body 7 maintains slight contact with the contact plate 88, and the slide rod 86 is in a relatively stable position under the action of the spring 87. The pressure value detected by the pressure sensor 85 is within the normal range. When the surface of the fan blade body 7 begins to freeze, the ice layer will gradually thicken, resulting in an increase in the overall thickness of the blade. As the blade thickness increases, the squeezing force of the blade on the contact plate 88 will gradually increase during rotation. After being squeezed, the contact plate 88 will push the slide rod 86 to slide into the receiving column 83. During the sliding process, the slide rod 86 will compress the spring 87 and at the same time generate pressure on the pressure sensor 85. The pressure sensor 85 converts the sensed pressure signal into an electrical signal and transmits it to the control system in real time.

[0028] When the pressure signal received by the control system exceeds the preset threshold, it indicates that the icing on the fan blade body 7 is quite severe, affecting the normal operation of the fan. At this time, the control system will issue a command to connect the circuit between the pressure sensor 85 and the spiral heating wire 5, and the spiral heating wire 5 will start to generate heat. The heat generated by the spiral heating wire 5 is transferred to the fan blade body 7 through the fan casing 1, causing the ice layer on the blade surface to gradually melt. As the ice layer melts, the thickness of the blade gradually returns to normal, and the pressure on the contact plate 88 also decreases. The slide bar 86 gradually resets under the elastic force of the spring 87, and the pressure value detected by the pressure sensor 85 gradually returns to the normal range. When the pressure value is lower than the preset threshold, the control system will cut off the circuit between the pressure sensor 85 and the spiral heating wire 5, the spiral heating wire 5 stops heating, and the entire device returns to normal monitoring status.

[0029] It should also be noted that, with the above settings, the spiral heating wire 5 will only start working when the blades are iced to a certain extent and the pressure signal exceeds the threshold, thus avoiding unnecessary energy consumption. When the ice melts and the pressure returns to the normal range, the heating wire stops working in time, further saving energy.

[0030] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind turbine blade icing monitoring device comprising a wind turbine housing (1) characterised in that: A base (2) is fixed inside the fan housing (1), a motor (3) is fixed on the base (2), a coupling (6) is fixed at the output end of the motor (3), a plurality of fan blade bodies (7) are fixed on the outer ring of the coupling (6), a monitoring component (8) is provided on the fan housing (1), the monitoring component (8) includes a mounting bracket (81) fixedly connected to the fan housing (1), a cavity (82) is opened in the mounting bracket (81), and a contact plate (88) is slidably installed in the cavity (82).

2. A wind turbine blade ice monitoring device according to claim 1, characterised in that: A protective plate (4) is fixed inside the fan housing (1), and the coupling (6) is rotatably connected to the protective plate (4). A spiral heating wire (5) is installed on the fan housing (1).

3. A wind turbine blade ice monitoring device according to claim 2, characterised in that: A receiving column (83) is fixed inside the cavity (82), and a frustum (84) is fixed at the end of the receiving column (83). A pressure sensor (85) is installed on the inner wall of the receiving column (83). A sliding rod (86) is slidably connected inside the frustum (84), and the sliding rod (86) is fixedly connected to the contact plate (88).

4. A wind turbine blade ice monitoring device according to claim 3, characterised in that: The receiving column (83) is hollow, and the sliding rod (86) slides inside the receiving column (83).

5. A wind turbine blade ice monitoring device according to claim 4, characterised in that: A spring (87) is sleeved on the outer ring of the slide rod (86). One end of the spring (87) is fixedly connected to the side wall of the contact plate (88), and the other end of the slide rod (86) is fixedly connected to the side wall of the receiving column (83).

6. A wind turbine blade ice monitoring device according to claim 3, characterised in that: The pressure sensor (85) is electrically connected to the spiral heating wire (5).

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