SL1500 wind turbine generator variable pitch motor heat dissipation device

Abstract

The utility model discloses a heat dissipation device for a variable-pitch motor of an SL1500 wind turbine generator set, and belongs to the technical field of variable-pitch systems of wind turbine generator sets. The heat dissipation device comprises a support used for being clamped and fixed to the outer portion of the variable-pitch motor, and the support is detachably and fixedly connected with a heat dissipation assembly used for conducting heat dissipation on the variable-pitch motor; the support is detachably and fixedly connected with a temperature sensor used for monitoring the temperature of the variable pitch motor, and the temperature sensor is electrically connected with a controller. The temperature sensor is arranged outside the variable-pitch motor and used for monitoring the temperature of the variable-pitch motor, if the temperature of the variable-pitch motor is too high, the controller controls the heat dissipation assembly to be started, the variable-pitch motor is automatically cooled, the effect of protecting the variable-pitch motor is achieved, the variable-pitch motor is prevented from being damaged, and safety is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of wind turbine pitch system, specifically relating to a heat dissipation device for the pitch motor of an SL1500 wind turbine. Background Technology

[0002] The original design of the Sinovel SL1500 turbine lacked a cooling system for its pitch control system, relying solely on the natural air cooling of the pitch motor itself. This resulted in low heat dissipation efficiency, especially under high wind speeds. The constant pitch adjustment of the blades, coupled with the significant torque required for blade angle adjustments in strong winds, led to rapid temperature rise in the pitch motor. When the temperature exceeded 100°C, the motor's load-carrying capacity decreased, requiring a larger current to handle the same load, further increasing the motor temperature and creating a vicious cycle. This resulted in the motor protection system failing to activate or the motor being damaged, and in high wind speeds, it could easily lead to runaway accidents. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a heat dissipation device for the pitch motor of the SL1500 wind turbine, thus solving the problems mentioned in the background art.

[0004] The objective of this invention is achieved as follows: A heat dissipation device for the pitch motor of an SL1500 wind turbine includes: a bracket for snapping and fixing to the outside of the pitch motor; a heat dissipation component for cooling the pitch motor is detachably and fixedly connected to the bracket; and a temperature sensor for monitoring the pitch motor temperature is detachably and fixedly connected to the bracket. The temperature sensor is electrically connected to a controller. By installing a temperature sensor on the outside of the pitch motor to monitor its temperature, if the pitch motor temperature is too high, the controller activates the heat dissipation component to automatically cool the pitch motor, thus protecting it, preventing damage, and improving safety.

[0005] Furthermore, the bracket includes a left card holder and a right card holder, which are connected by a bolt assembly; the left card holder includes an upper left rod and a lower left rod, the front ends of which are fixedly connected by a left front plate, and the rear ends of which are fixedly connected by a left rear plate; the right card holder includes an upper right rod and a lower right rod, the front ends of which are fixedly connected by a right front plate, and the rear ends of which are fixedly connected by a right rear plate.

[0006] Furthermore, the left front panel is fixedly connected to a left front upper extension rod and a left front lower extension rod, and the outer ends of the left front upper extension rod and the left front lower extension rod are both vertically fixedly connected to a left front flap; the left rear panel is fixedly connected to a left rear upper extension rod and a left rear lower extension rod, and the outer ends of the left rear upper extension rod and the left rear lower extension rod are both vertically fixedly connected to a left rear flap; both the left front flap and the left rear flap are provided with a left connecting hole.

[0007] Furthermore, the right front panel is fixedly connected to a right front upper extension rod and a right front lower extension rod, and the outer ends of the right front upper extension rod and the right front lower extension rod are both vertically fixedly connected to a right front flap; the right rear panel is fixedly connected to a right rear upper extension rod and a right rear lower extension rod, and the outer ends of the right rear upper extension rod and the right rear lower extension rod are both vertically fixedly connected to a right rear flap; both the right front flap and the right rear flap are provided with a right connecting hole.

[0008] Furthermore, the bolt assembly includes a screw inserted into the left and right connecting holes, the other end of which is threaded with a butterfly nut.

[0009] When in use, the bracket and bolt assembly can be used to adapt to various specifications of pitch motors. It is not limited by the shape modification of the pitch motor and can be directly installed. The operation is simple.

[0010] Furthermore, the heat dissipation assembly includes a first fan and a second fan, which are respectively disposed on both sides of the pitch motor. The temperature sensor is connected to thermal grease, which is applied to the outer wall of the pitch motor. The controller is connected to a circuit breaker. The application of thermal grease allows for more accurate temperature monitoring of the pitch motor by the temperature sensor.

[0011] The beneficial effects of this invention are as follows: By installing a temperature sensor externally on the pitch motor, the sensor monitors the pitch motor's temperature. If the pitch motor temperature is too high, the controller activates the heat dissipation components to automatically cool the pitch motor, protecting it from damage and improving safety. The use of thermal grease further enhances the accuracy of temperature monitoring by the temperature sensor. This invention also solves the problem of the pitch motor easily overheating in windy conditions on the Sinovel SL1500 generator set, leading to poor load-bearing capacity and even motor damage, effectively preventing runaway accidents. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0013] Figure 2 This is a top view of the structure of the present invention;

[0014] Figure 3This is a schematic diagram of the left-side stereoscopic structure of the present invention;

[0015] Figure 4 This is a right-view stereoscopic structural diagram of the present invention;

[0016] Figure 5 This is the invention Figure 4 Enlarged view of A in the middle;

[0017] Figure 6 This is a temperature time period diagram of existing pitch motor technology;

[0018] Figure 7 This is a temperature chart of the pitch motor after the modification.

[0019] In the diagram: 1 Temperature sensor, 2 Controller, 3 Upper left rod, 4 Lower left rod, 5 Front left plate, 6 Rear left plate, 7 Upper right rod, 8 Lower right rod, 9 Front right plate, 10 Rear right plate, 11 Upper left front extension rod, 12 Front left flap, 13 Upper right front extension rod, 14 Front right flap, 15 Screw, 16 Butterfly nut, 17 First fan, 18 Second fan, 19 Thermal grease, 20 Circuit breaker, 21 Pitch motor. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that all directional terms such as up, down, front, back, left, and right appearing in the present invention are not intended to limit the present invention, but are only used to more clearly explain and interpret the present invention. Example

[0021] like Figure 1-7 As shown in the figure, this embodiment discloses a heat dissipation device for the pitch motor of an SL1500 wind turbine, which includes: a bracket for snapping and fixing to the outside of the pitch motor; a heat dissipation component for cooling the pitch motor detachably fixedly connected to the bracket; and a temperature sensor 1 for monitoring the temperature of the pitch motor detachably fixedly connected to the bracket. The temperature sensor 1 is electrically connected to a controller 2. By setting the temperature sensor 1 outside the pitch motor to monitor its temperature, if the temperature of the pitch motor is too high, the controller 2 activates the heat dissipation component to automatically cool the pitch motor, thereby protecting it, preventing damage, and improving safety. Example

[0022] like Figure 1-7As shown in the figure, this embodiment discloses a heat dissipation device for the pitch motor of an SL1500 wind turbine, which includes: a bracket for snapping and fixing to the outside of the pitch motor; a heat dissipation component for cooling the pitch motor detachably fixedly connected to the bracket; and a temperature sensor 1 for monitoring the temperature of the pitch motor detachably fixedly connected to the bracket. The temperature sensor 1 is electrically connected to a controller 2. By setting the temperature sensor 1 outside the pitch motor to monitor its temperature, if the temperature of the pitch motor is too high, the controller 2 activates the heat dissipation component to automatically cool the pitch motor, thereby protecting it, preventing damage, and improving safety.

[0023] For better performance, the bracket includes a left card holder and a right card holder, which are connected by a bolt assembly. The left card holder includes an upper left rod 3 and a lower left rod 4. The front ends of the upper left rod 3 and the lower left rod 4 are fixedly connected by a left front plate 5, and the rear ends of the upper left rod 3 and the lower left rod 4 are fixedly connected by a left rear plate 6. The right card holder includes an upper right rod 7 and a lower right rod 8. The front ends of the upper right rod 7 and the lower right rod 8 are fixedly connected by a right front plate 9, and the rear ends of the upper right rod 7 and the lower right rod 8 are fixedly connected by a right rear plate 10.

[0024] For better performance, the left front plate 5 is fixedly connected to the left front upper extension rod 11 and the left front lower extension rod, and the outer ends of the left front upper extension rod 11 and the left front lower extension rod are both vertically fixedly connected to the left front flap 12; the left rear plate 6 is fixedly connected to the left rear upper extension rod and the left rear lower extension rod, and the outer ends of the left rear upper extension rod and the left rear lower extension rod are both vertically fixedly connected to the left rear flap; both the left front flap 12 and the left rear flap are provided with a left connecting hole.

[0025] For better performance, the right front plate 9 is fixedly connected to the right front upper extension rod 13 and the right front lower extension rod, and the outer ends of the right front upper extension rod 13 and the right front lower extension rod are both vertically fixedly connected to the right front flap 14; the right rear plate 10 is fixedly connected to the right rear upper extension rod and the right rear lower extension rod, and the outer ends of the right rear upper extension rod and the right rear lower extension rod are both vertically fixedly connected to the right rear flap; both the right front flap 14 and the right rear flap are provided with right connecting holes.

[0026] For better performance, the bolt assembly includes a screw 15 inserted into the left and right connecting holes, with a butterfly nut 16 threaded to the other end of the screw 15. In use, the bracket and bolt assembly can accommodate various pitch motor specifications, without being limited by modifications to the pitch motor's shape, allowing for direct installation and simple operation. Example

[0027] like Figure 1-7As shown in the figure, this embodiment discloses a heat dissipation device for the pitch motor of an SL1500 wind turbine, which includes: a bracket for snapping and fixing to the outside of the pitch motor; a heat dissipation component for cooling the pitch motor detachably fixedly connected to the bracket; and a temperature sensor 1 for monitoring the temperature of the pitch motor detachably fixedly connected to the bracket. The temperature sensor 1 is electrically connected to a controller 2. By setting the temperature sensor 1 outside the pitch motor to monitor its temperature, if the temperature of the pitch motor is too high, the controller 2 activates the heat dissipation component to automatically cool the pitch motor, thereby protecting it, preventing damage, and improving safety.

[0028] For better performance, the bracket includes a left card holder and a right card holder, which are connected by a bolt assembly. The left card holder includes an upper left rod 3 and a lower left rod 4. The front ends of the upper left rod 3 and the lower left rod 4 are fixedly connected by a left front plate 5, and the rear ends of the upper left rod 3 and the lower left rod 4 are fixedly connected by a left rear plate 6. The right card holder includes an upper right rod 7 and a lower right rod 8. The front ends of the upper right rod 7 and the lower right rod 8 are fixedly connected by a right front plate 9, and the rear ends of the upper right rod 7 and the lower right rod 8 are fixedly connected by a right rear plate 10.

[0029] For better performance, the left front plate 5 is fixedly connected to the left front upper extension rod 11 and the left front lower extension rod, and the outer ends of the left front upper extension rod 11 and the left front lower extension rod are both vertically fixedly connected to the left front flap 12; the left rear plate 6 is fixedly connected to the left rear upper extension rod and the left rear lower extension rod, and the outer ends of the left rear upper extension rod and the left rear lower extension rod are both vertically fixedly connected to the left rear flap; both the left front flap 12 and the left rear flap are provided with a left connecting hole.

[0030] For better performance, the right front plate 9 is fixedly connected to the right front upper extension rod 13 and the right front lower extension rod, and the outer ends of the right front upper extension rod 13 and the right front lower extension rod are both vertically fixedly connected to the right front flap 14; the right rear plate 10 is fixedly connected to the right rear upper extension rod and the right rear lower extension rod, and the outer ends of the right rear upper extension rod and the right rear lower extension rod are both vertically fixedly connected to the right rear flap; both the right front flap 14 and the right rear flap are provided with right connecting holes.

[0031] When in use, the bracket uses 20mm*3mm flat steel strips, which are made of galvanized flat steel, resulting in extremely low procurement costs and cost savings.

[0032] For better performance, the bolt assembly includes a screw 15 inserted into the left and right connecting holes, with a butterfly nut 16 threaded to the other end of the screw 15. In use, the bracket and bolt assembly can accommodate various pitch motor specifications, without being limited by modifications to the pitch motor's shape, allowing for direct installation and simple operation.

[0033] For better performance, the heat dissipation assembly includes a first fan 17 and a second fan 18, which are respectively located on both sides of the pitch motor. The temperature sensor 1 is connected to thermal grease 19, which is applied to the outer wall of the pitch motor. The controller 2 is connected to a circuit breaker 20. The use of thermal grease 19 allows the temperature sensor 1 to monitor the pitch motor temperature more accurately.

[0034] The first fan 17 and the second fan 18 are 230V, 1A, and 3000r / min speed fans. Since they are detachably connected to the bracket, replacement in case of damage is considered in the design, making replacement very convenient and quick. The total cost of purchasing the two fans and installing the welding bracket is approximately 500 yuan. Three fans are needed for one fan, with a total cost of approximately 1500 yuan. Installation is convenient and operating costs are low.

[0035] pass Figure 6 and Figure 7 It can be seen that during periods of high wind and at full power output, the temperature of the pitch motor before the modification was above 90 degrees Celsius at its highest and above 60 degrees Celsius at its lowest, with an average temperature of around 80 degrees Celsius. After the modification, the temperature of the pitch motor was around 65 degrees Celsius at its highest and around 45 degrees Celsius at its lowest, with an average temperature of around 40 degrees Celsius. By comparing the temperature changes before and after the modification, the device created in this invention has a very significant cooling effect on the pitch motor.

[0036] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A heat dissipation device for the pitch motor of an SL1500 wind turbine, characterized in that, include: A bracket for snapping and fixing to the outside of the pitch motor, the bracket being detachably and fixedly connected to a heat dissipation component for cooling the pitch motor, and a temperature sensor for monitoring the temperature of the pitch motor being detachably and fixedly connected to the bracket, the temperature sensor being electrically connected to a controller.

2. The heat dissipation device for the pitch motor of the SL1500 wind turbine according to claim 1, characterized in that, The bracket includes a left card holder and a right card holder, which are connected by a bolt assembly. The left card holder includes an upper left rod and a lower left rod, the front ends of which are fixedly connected by a left front plate, and the rear ends of which are fixedly connected by a left rear plate. The right card holder includes an upper right rod and a lower right rod, the front ends of which are fixedly connected by a right front plate, and the rear ends of which are fixedly connected by a right rear plate.

3. The heat dissipation device for the pitch motor of the SL1500 wind turbine according to claim 2, characterized in that, The left front panel is fixedly connected to a left front upper extension rod and a left front lower extension rod, and the outer ends of the left front upper extension rod and the left front lower extension rod are both vertically fixedly connected to a left front flap; the left rear panel is fixedly connected to a left rear upper extension rod and a left rear lower extension rod, and the outer ends of the left rear upper extension rod and the left rear lower extension rod are both vertically fixedly connected to a left rear flap; both the left front flap and the left rear flap are provided with a left connecting hole.

4. The heat dissipation device for the pitch motor of the SL1500 wind turbine according to claim 3, characterized in that, The right front panel is fixedly connected to a right front upper extension rod and a right front lower extension rod, and the outer ends of the right front upper extension rod and the right front lower extension rod are both vertically fixedly connected to a right front flap; the right rear panel is fixedly connected to a right rear upper extension rod and a right rear lower extension rod, and the outer ends of the right rear upper extension rod and the right rear lower extension rod are both vertically fixedly connected to a right rear flap; both the right front flap and the right rear flap are provided with a right connecting hole.

5. The heat dissipation device for the pitch motor of the SL1500 wind turbine according to claim 4, characterized in that, The bolt assembly includes a screw inserted into the left and right connecting holes, with a butterfly nut threaded onto the other end of the screw.

6. The heat dissipation device for the pitch motor of the SL1500 wind turbine according to claim 1, characterized in that, The heat dissipation assembly includes a first fan and a second fan, which are respectively disposed on both sides of the pitch motor.

7. The heat dissipation device for the pitch motor of the SL1500 wind turbine according to claim 1, characterized in that, The temperature sensor is connected to thermal grease, which is applied to the outer wall of the pitch motor.

8. The heat dissipation device for the pitch motor of the SL1500 wind turbine according to claim 1, characterized in that, The controller is connected to a circuit breaker.

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