External heater for anti-freezing anemometer wind indicator of wind generating set

Abstract

The utility model discloses a wind generating set anti-freezing anemograph wind indicator external heater which comprises heating mechanisms, a PLC control module and a relay, the two heating mechanisms are respectively installed on the surface of a cylindrical shaft seat at the bottom end of an anemograph and the surface of a cylindrical shaft seat at the bottom end of a wind indicator; the heating mechanism comprises a patch type heater fixed on the outer surface of the cylindrical shaft seat; the device further comprises a relay control circuit and a heater control circuit. According to the utility model, the patch type heater is arranged on the wind indicator of the anemograph, and the relay remotely controlled by the PLC is added, so that when the anemograph or the wind indicator is frozen, the number can be set to the PLC output port remotely, and the heater is started to heat and deice; after the wind speed or wind direction data changes, the set number is released, heating is stopped, the normal functions of the anemograph and the wind indicator can be rapidly recovered through the design, unit faults caused by freezing are avoided, the operation reliability and the power generation efficiency of the unit are improved, and the maintenance cost is reduced.

Description

An external heater for an ice-resistant anemometer and wind vane of a wind turbine generator set. Technical Field

[0001] This utility model belongs to the field of wind power generation technology, specifically relating to an external heater for the wind vane of an anti-icing anemometer in a wind turbine generator set. Background Technology

[0002] In the field of wind power generation, anemometers and wind vanes are key components of wind turbine generator sets, playing a vital role in the normal operation and efficient power generation of the units. They can accurately measure wind speed and direction information in real time and feed this data back to the unit's control system, so that the control system can adjust the operating status of the wind turbine according to the real-time wind conditions, ensuring that the wind turbine can operate safely, stably and efficiently under various environmental conditions.

[0003] However, in actual operation, anemometers and wind vanes face numerous harsh environmental challenges, especially in cold and humid regions, where their reliability and stability are severely affected. Since wind turbines typically operate continuously for extended periods, the built-in heaters of icing-resistant anemometers and wind vanes are easily damaged by moisture when exposed to such environments. Even if the wind speed and direction measurement components remain functional, frequent snowfall in early winter and early spring can easily cause ice to form on the surface of the anemometer or wind vane. Once ice forms, rotating and stationary components become frozen, preventing normal operation. When the anemometer or wind vane is frozen, the unit's control system will detect the abnormality and report an anemometer or wind vane malfunction. In order to restore the normal operation of the unit, manual on-site de-icing is often required, or the anemometer or wind vane needs to be replaced directly. Manual de-icing is not only labor-intensive and inefficient, but also poses a certain risk to the personal safety of the staff in severe weather conditions. Replacing the anemometer or wind vane will increase the unit's downtime, reduce the unit's power generation efficiency, and increase the equipment maintenance cost.

[0004] Therefore, this utility model proposes an external heater for the wind vane of an anti-freezing anemometer in a wind turbine generator set. Summary of the Invention

[0005] The purpose of this invention is to provide an external heater for the wind vane of a wind turbine generator set that is resistant to freezing, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an external heater for the wind vane and an anti-icing anemometer of a wind turbine generator set, comprising...

[0007] The heating mechanism, PLC control module, and relay are respectively installed on the cylindrical bearing surface at the bottom of the anemometer and wind vane. The heating mechanism includes a patch heater fixed on the outer surface of the cylindrical bearing.

[0008] It also includes a relay control circuit and a heater control circuit. The relay control circuit includes a PLC control module, a relay port A1 and a relay port A2. The PLC control module is electrically connected to the relay port A1, and the relay port A2 is grounded. The heater control circuit includes relay contacts 11, 14, 21 and 24. Contact 14 is electrically connected to the patch heater at the bottom of the anemometer, and contact 24 is electrically connected to the patch heater at the bottom of the wind vane.

[0009] Preferably, the heating mechanism further includes a top base ring and a protective sleeve that are slidably sleeved on the surface of the cylindrical bearing seat. The protective sleeve is fixed to the bottom surface of the top base ring and covers the patch heater inside.

[0010] Preferably, it also includes a support block fixed to the surface of the cylindrical bearing seat, and the top base ring is pressed against the top of the support block.

[0011] Preferably, the heating mechanism further includes a heat-conducting plate installed on the inner wall of the cylindrical bearing and positioned corresponding to the patch heater, wherein the inner surface of the heat-conducting plate is provided with a plurality of integral heat-conducting fins.

[0012] Preferably, the outer side of the heat-conducting plate is provided with three integrated heat-conducting blocks, and the heat-conducting blocks are inserted into the inner wall of the cylindrical bearing seat.

[0013] Preferably, the heating mechanism further includes an annular sealing ring installed on the inner wall of the bottom end of the protective cover, and the annular sealing ring is in contact with the surface of the cylindrical bearing.

[0014] Preferably, the top base ring has an inner groove, in which a spring and a telescopic ball are installed, and the surface of the cylindrical shaft seat has a limiting groove corresponding to the telescopic ball. The telescopic ball is movably installed in the inner groove by the spring, and the end of the telescopic ball is engaged in the limiting groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: By installing a patch heater on the anemometer and wind vane and adding a relay remotely controlled by a PLC, when the anemometer or wind vane freezes, a value can be remotely set to the PLC output port to start the heater for heating and de-icing; when the wind speed or wind direction data changes, the value is released and heating stops. This design can quickly restore the normal function of the anemometer and wind vane, avoid unit failures caused by icing, improve the unit's operational reliability and power generation efficiency, and reduce maintenance costs. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of this utility model;

[0017] Figure 2 is a partial enlarged view of region A in Figure 1 of this utility model;

[0018] Figure 3 is a cross-sectional view of this utility model;

[0019] Figure 4 is a circuit diagram of the relay control circuit of this utility model;

[0020] Figure 5 is a circuit diagram of the heater control circuit of this utility model;

[0021] In the diagram: 1. Heating mechanism; 11. Top base ring; 111. Inner groove; 112. Spring; 113. Telescopic retaining ball; 12. Protective cover; 13. Surface mount heater; 14. Heat-conducting plate; 141. Heat-conducting fins; 142. Heat-conducting block; 15. Annular sealing ring; 2. Cylindrical bearing seat; 21. Support block; 22. Limiting groove; 3. Anemometer; 4. Wind vane. Detailed Implementation

[0022] 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.

[0023] Example

[0024] Please refer to Figures 1 to 5, which illustrate an embodiment of this utility model. This embodiment provides a technical solution: an external heater for an anti-icing anemometer wind vane of a wind turbine generator set, comprising...

[0025] The system comprises a heating mechanism 1, a PLC control module, and a relay. The PLC control module controls the relay to activate which heater. Heating is activated when freezing weather occurs, i.e., when the wind speed is zero (no change in wind speed for 5 consecutive minutes) and the wind direction data remains unchanged. Two heating mechanisms 1 are respectively mounted on the cylindrical bearing 2 at the bottom of the anemometer 3 and the wind vane 4. Both the wind vane 4 and the anemometer 3 are rotatably mounted on top of the cylindrical bearing 2 via a rotating shaft component. They can rotate normally when not frozen. The heating mechanism 1 includes a patch heater 13 fixed to the outer surface of the cylindrical bearing 2, as well as a relay control circuit and a heater control circuit. The relay control circuit includes the A1 and A2 ports of the PLC control module (model Beckhoof KL2134) and the relay (model 114K10). The PLC control module is electrically connected to the A1 port of the relay. The relay's A2 port is grounded. The heater control circuit includes relay contacts 11, 14, 21, and 24. Contact 14 is electrically connected to the surface-mount heater 13 at the bottom of the anemometer 3, and contact 24 is electrically connected to the surface-mount heater 13 at the bottom of the wind vane 4. During actual operation, the relay's A1 port is controlled via the digital output port of the PLC control module, and the A2 port is grounded. When the heater needs to be started, the PLC control module outputs a high level via the configuration file, the relay is energized, and contacts 11 and 14, and 21 and 24 are connected. The surface-mount heaters 13 at the bottom of the anemometer 3 and the wind vane 4 are started and begin heating. The wind direction and speed data changes are observed in the background to indicate ice removal. The PLC control module output is controlled to be low via the configuration file, thus completing one ice removal operation.

[0026] In this embodiment, preferably, the heating mechanism 1 further includes a top base ring 11 and a protective cover 12 that are slidably sleeved on the surface of the cylindrical bearing seat 2. The protective cover 12 is fixed to the bottom surface of the top base ring 11 and covers the patch heater 13 inside, which can play a certain role in wrapping and protecting the patch heater 13 during daily use.

[0027] In this embodiment, preferably, it also includes a support block 21 welded and fixed to the surface of the cylindrical bearing 2, and the top base ring 11 presses on the top of the support block 21, which can play a positioning role when the top base ring 11 slides down, preventing the top base ring 11 from moving down too much and affecting the patch heater 13.

[0028] In this embodiment, preferably, the heating mechanism 1 further includes a heat-conducting plate 14 installed on the inner wall of the cylindrical bearing seat 2 and positioned corresponding to the patch heater 13. The inner surface of the heat-conducting plate 14 is provided with a plurality of integrated heat-conducting fins 141. When the patch heater 13 is running, it will first heat the cylindrical bearing seat 2. The heat of the cylindrical bearing seat 2 can be dissipated into the interior of the cylindrical bearing seat 2 through the heat-conducting plate 14 and the heat-conducting fins 141, thereby heating the rotating parts at the bottom of the anemometer 3 and the wind vane 4 to achieve defrosting.

[0029] In this embodiment, preferably, the outer side of the heat-conducting plate 14 is provided with three integrated heat-conducting blocks 142, and the heat-conducting blocks 142 are inserted into the inner wall of the cylindrical bearing seat 2. The heat-conducting plate 14, the heat-conducting fins 141 and the heat-conducting blocks 142 are all made of copper, which can further accelerate the heat conduction efficiency between the cylindrical bearing seat 2 and the heat-conducting plate 14 and improve the heating efficiency.

[0030] In this embodiment, preferably, the heating mechanism 1 further includes an annular sealing ring 15 installed on the inner wall of the bottom end of the protective cover 12. The annular sealing ring 15 is made of fluororubber and will undergo elastic deformation when squeezed. The annular sealing ring 15 is in contact with the surface of the cylindrical bearing 2 to seal the bottom end of the protective cover 12 and reduce the heat loss when the patch heater 13 is heating.

[0031] In this embodiment, preferably, the top base ring 11 has an inner groove 111 inside, and a spring 112 and a telescopic retaining ball 113 are installed in the inner groove 111. The surface of the cylindrical bearing 2 has a limiting groove 22 corresponding to the telescopic retaining ball 113. The telescopic retaining ball 113 is movably installed in the inner groove 111 by the spring 112, and the end of the telescopic retaining ball 113 is inserted into the limiting groove 22, so as to realize the locking and limiting of the top base ring 11 during daily use. If the top base ring 11 and the protective bearing 113 need to be removed later, the locking and limiting of the top base ring 11 can be achieved. When the cover 12 moves upward, simply push the top base ring 11 upward so that the end of the telescopic locking ball 113 is squeezed into the inner groove 111. This will allow the top base ring 11 and the protective cover 12 to move upward smoothly. When the protective cover 12 moves upward, the annular sealing ring 15 will also be deformed by the patch heater 13, so that the protective cover 12 can move upward smoothly to the top of the patch heater 13, allowing the patch heater 13 to be exposed. At this time, the operator can inspect and maintain the patch heater 13.

[0032] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external heater for an anti-icing anemometer and wind vane of a wind turbine generator set, characterized in that: It includes a heating mechanism (1), a PLC control module and a relay. The two heating mechanisms (1) are respectively installed on the surface of the cylindrical bearing (2) at the bottom of the anemometer (3) and the wind vane (4). The heating mechanism (1) includes a patch heater (13) fixed on the outer surface of the cylindrical bearing (2).

2. The external heater for the wind vane and anemometer of a wind turbine generator set under icing conditions as described in claim 1, characterized in that: The heating mechanism (1) further includes a top base ring (11) and a protective cover (12) that are slidably sleeved on the surface of the cylindrical bearing (2). The protective cover (12) is fixed on the bottom surface of the top base ring (11) and covers the patch heater (13) inside.

3. The external heater for the wind vane and anemometer of a wind turbine generator set under icing conditions as described in claim 1, characterized in that: It also includes a support block (21) fixed to the surface of the cylindrical bearing (2), and a top base ring (11) pressing on the top of the support block (21).

4. The external heater for the wind vane and anemometer of a wind turbine generator set under icing conditions as described in claim 1, characterized in that: The heating mechanism (1) also includes a heat-conducting plate (14) installed on the inner wall of the cylindrical bearing seat (2) and positioned corresponding to the patch heater (13). The inner surface of the heat-conducting plate (14) is provided with a plurality of integral heat-conducting fins (141).

5. An external heater for an anti-icing anemometer and wind vane of a wind turbine generator set according to claim 4, characterized in that: The outer side of the heat-conducting plate (14) is provided with three integrated heat-conducting blocks (142), and the heat-conducting blocks (142) are inserted into the inner wall of the cylindrical bearing seat (2).

6. The external heater for the wind vane and anemometer of a wind turbine generator set under icing conditions as described in claim 1, characterized in that: The heating mechanism (1) also includes an annular sealing ring (15) installed on the inner wall of the bottom end of the protective cover (12), and the annular sealing ring (15) is in contact with the surface of the cylindrical bearing (2).

7. An external heater for an anti-icing anemometer and wind vane of a wind turbine generator set according to claim 2, characterized in that: The top base ring (11) has an inner groove (111) inside. The inner groove (111) is equipped with a spring (112) and a telescopic ball (113). The cylindrical shaft seat (2) has a limiting groove (22) corresponding to the telescopic ball (113) on its surface. The telescopic ball (113) is movably installed in the inner groove (111) by the spring (112), and the end of the telescopic ball (113) is inserted into the limiting groove (22).

8. An external heater for an anti-icing anemometer and wind vane of a wind turbine generator set according to claim 1, characterized in that: It also includes a relay control circuit and a heater control circuit. The relay control circuit includes a PLC control module, a relay A1 port and an A2 port. The PLC control module is electrically connected to the relay A1 port, and the relay A2 port is grounded. The heater control circuit includes relay contacts 11, 14, 21 and 24. Contact 14 is electrically connected to the patch heater (13) at the bottom of the anemometer (3), and contact 24 is electrically connected to the patch heater (13) at the bottom of the wind vane (4).

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