Gearbox cooler of wind turbine generator unit is equipped with self-cleaning dirt and foreign matter removal and recovery device

Abstract

This utility model belongs to the field of wind turbine technology, specifically a self-cleaning and foreign matter recovery device for a wind turbine gearbox cooler, including a blower pipe installed in the area between the heat exchanger fins and the motor blades. This self-cleaning and foreign matter recovery device for the wind turbine gearbox cooler, through the setting of a blower section and an electromagnetic pulse valve, automatically controls the electromagnetic pulse valve to instantly convert air pressure energy into air jet kinetic energy, generating a powerful impact force that blows the heat exchanger fins from top to bottom in real time. This prevents plant fibers, dust, or other small foreign objects adhering to the lower surface of the fins during fan operation from adhering. Simultaneously, the slight negative pressure generated by the lower fan transports these foreign objects to the outside of the nacelle, preventing them from re-adhering to the heat exchanger fins, thus ensuring the constant cleanliness of the heat exchanger fin surface. It is an environmentally friendly, pollution-free, and low-energy-consumption ideal self-cleaning device.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, and in particular to a self-cleaning and foreign matter recovery device for adding a gearbox cooler to a wind turbine generator set. Background Technology

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives a rotor to rotate and ultimately outputs alternating current (AC). It is a clean and renewable energy source. Wind power generation does not rely on fossil fuels, causes no environmental pollution, has no fuel price risk, has stable power generation costs, and boasts vast reserves and wide distribution. In recent years, wind power installed capacity has developed rapidly, bringing significant economic and social benefits to enterprises, but it also faces some inherent equipment challenges.

[0003] Firstly, from an economic perspective, dust, willow catkins, and other foreign objects in the air enter the cooling system of wind turbines, adhering to the heat exchanger fins and causing blockages, making maintenance difficult. Blocked heat exchangers have reduced heat exchange efficiency, causing the cooling water temperature to become too high, leading to high temperature alarms and shutdowns of the wind turbine, thus affecting economic efficiency and power generation.

[0004] Secondly, from a safety perspective, the inability to dissipate heat from the nacelle in a timely manner will accelerate the aging or even failure of the generator's insulation components; at the same time, high temperatures will cause the gear oil viscosity to decrease, the lubricating oil film to become thinner, thereby weakening the lubrication and protection function; high temperatures will also accelerate the oxidation and deterioration of the gear oil, shorten the service life of the gear oil, and reduce the operating safety factor of the wind turbine generator set and increase the equipment failure rate.

[0005] There are many reasons for the temperature rise of the unit equipment, among which the continuous decline in the heat exchange capacity of the air-cooled water heat exchanger is the most common. When the air-cooled water heat exchanger is blocked, on-site maintenance personnel can only manually clean the air-cooled water heat exchanger periodically, or clean the heat sink with a high-pressure water gun. Although the blockage is resolved after multiple cleanings, it cannot fundamentally solve the problem.

[0006] Because the engine room is a non-sealed space, external dust and willow catkins can easily enter. Additionally, oil vapors from leaking ethylene glycol are present in the engine room air. Over time, dust, willow catkins, and oil vapors are drawn in by the fan and adhere to the heat exchanger. The resulting sludge-like substance can easily clog the heat exchange elements.

[0007] Currently, the common practice is to maintain the heat dissipation capacity of the heat exchanger by constantly cleaning its fins. This method brings a lot of workload to the air field. At the same time, because air-cooled water heat exchangers generally use a small corrugated plate design, they cannot be thoroughly cleaned. The cleaning cycle is getting shorter and shorter, but the difficulty is getting greater and greater. Utility Model Content

[0008] Based on existing technical problems, this utility model proposes a self-cleaning, dirt removal, and foreign matter recovery device for adding to the gearbox cooler of a wind turbine generator set.

[0009] This utility model proposes a self-cleaning and foreign matter recovery device for a wind turbine gearbox cooler, which includes a blower pipe installed in the area between the heat exchanger fins and the motor blades.

[0010] The inlet of the blowpipe is provided with a blowpipe section. The opposite ends of the two blowpipes are respectively fixedly connected to a first rectangular tube. The opposite ends of the two first rectangular tubes are rotatably connected to a second rectangular tube that is not connected to each other. The lower surface of the second rectangular tube is fixedly connected to a nozzle.

[0011] An electromagnetic pulse valve is fixedly installed on the surface of the first rectangular tube to control the release of air pressure pulses in the second rectangular tube.

[0012] The first rectangular tube is equipped with a jet steering mechanism that controls the rotation of the second rectangular tube.

[0013] Preferably, the nozzles arrayed on adjacent second rectangular tubes are staggered.

[0014] Preferably, by controlling the movement of the armature of the electromagnetic pulse valve, the vent hole of the rear air chamber in the electromagnetic pulse valve is opened, and then the vocal cords in the rear air chamber are depressurized, the diaphragm moves backward, and compressed air can be sprayed out of the output port to blow away dust.

[0015] Through the above technical solution, compressed air is instantly ejected from the electromagnetic pulse valve, forming a pulse jet airflow of a certain intensity.

[0016] Preferably, the injection unit mainly consists of an air compressor, an air tank, and a pulse controller. The electromagnetic pulse valve is electrically connected to the pulse controller, and the action of the electromagnetic pulse valve is controlled by the electrical signal emitted by the pulse controller.

[0017] The above technical solution can store the necessary air pressure for blowing dust.

[0018] Preferably, after the air inlet end of the first rectangular tube is connected to the air outlet end of the air storage tank, the air pressure is controlled by the pulse controller to spray out from the electromagnetic pulse valve, and the pulse controller controls the air compressor to store the compressed air into the air storage tank.

[0019] Through the above technical solution, the electromagnetic pulse valve can instantly convert air pressure energy into air jet kinetic energy, which generates a powerful impact force to blow the heat exchanger fins from top to bottom in real time.

[0020] Preferably, the bottom of the heat exchanger fins is also provided with a foreign matter recovery section for transporting dust to the outside of the cabin.

[0021] The foreign matter recovery unit mainly consists of a fan and a pipe. Dust is sucked out by the negative pressure of the fan and discharged from the pipe.

[0022] Preferably, the jet steering mechanism includes a bearing housing fixedly mounted on the surface of the first rectangular tube, a drive shaft is mounted on the inner ring of the bearing in the bearing housing, and a worm gear is fixedly sleeved on the surface of the drive shaft.

[0023] A worm gear is fixedly sleeved on the outer surface of one end of the second rectangular tube. The worm gear meshes with the worm to drive the second rectangular tube to rotate.

[0024] Through the above technical solution, the meshing of the worm gear and the worm can achieve a unidirectional transmission effect and precise transmission, thereby enabling precise control of the blowing angle even when it is outside.

[0025] Preferably, the middle section of the drive shaft is cut off and connected to a dual-output shaft geared motor fixed to the upper surface of the first rectangular tube, so that the drive shaft is driven by the dual-output shaft geared motor.

[0026] Through the above technical solution, the transmission length of a dual-output-shaft geared motor can be shortened, and the transmission accuracy can be increased.

[0027] The beneficial effects of this utility model are as follows:

[0028] 1. By incorporating a jetting section and an electromagnetic pulse valve, the automatically controlled electromagnetic pulse valve instantly converts air pressure energy into air jet kinetic energy, generating a powerful impact force that continuously and directionally blows the heat exchanger fins from top to bottom. This prevents plant fibers, dust, or other small foreign objects adhering to the lower surface of the fins during fan operation from re-attaching. Simultaneously, the slight negative pressure generated by the lower fan transports these particles to the outside of the hopper, preventing them from re-adhering to the heat exchanger fins, thus ensuring the constant cleanliness of the fin surface. This is an environmentally friendly, pollution-free, and low-energy-consumption ideal self-cleaning device for unclogging.

[0029] 2. By setting up a jet steering mechanism, dust on the heat exchanger fins can be blown away from multiple angles, and dust on the surface of the second rectangular tube can also be cleaned. Simply turn the nozzle 90 degrees to blow away dust on the surface of the adjacent second rectangular tube. Attached Figure Description

[0030] Figure 1 A schematic diagram of a self-cleaning and foreign matter recovery device for a wind turbine gearbox cooler proposed in this utility model;

[0031] Figure 2A three-dimensional view of a rectangular tube installation for a wind turbine gearbox cooler equipped with a self-cleaning and foreign matter recovery device, as proposed in this utility model.

[0032] Figure 3 The second rectangular tube diagram is shown for a wind turbine gearbox cooler equipped with a self-cleaning, decontamination, and foreign matter recovery device proposed in this utility model.

[0033] Figure 4 A perspective view of a jet steering mechanism for adding a self-cleaning, decontamination, and foreign matter recovery device to a wind turbine gearbox cooler according to this utility model;

[0034] Figure 5 The nozzle installation view of the wind turbine gearbox cooler with a self-cleaning and foreign matter recovery device proposed in this utility model is shown in the bottom view.

[0035] In the diagram: 1. Jet nozzle; 11. Air compressor; 12. Air tank; 13. Pulse controller; 2. First rectangular tube; 21. Bearing housing; 22. Drive shaft; 23. Worm gear; 24. Worm wheel; 25. Dual-output shaft geared motor; 3. Second rectangular tube; 4. Nozzle; 5. Electromagnetic pulse valve; 6. Heat exchanger fins; 61. Fan; 62. Pipeline; 7. Motor blades. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] Reference Figure 1-5 A wind turbine gearbox cooler is equipped with a self-cleaning and foreign matter recovery device, including a blow pipe 1 installed in the area between the heat exchanger fins 6 and the motor blades 7.

[0038] To reduce wind resistance, the opposite ends of the two blow pipes 1 are respectively fixedly connected to a first rectangular tube 2. Using a rectangular tube can avoid the cross-section of the circular tube from obstructing the normal heat dissipation of the radiator. The advantage of the rectangular tube is that it reduces wind resistance while maintaining the same volume.

[0039] To effectively clean the dust from the heat exchanger fins 6, opposite ends of the first rectangular tubes 2 on both sides are rotatably connected to non-connected second rectangular tubes 3. The non-connected second rectangular tubes 3 prevent insufficient blowing pressure caused by too many nozzles 4 on a single rectangular tube. Nozzles 4 are fixedly connected to the lower surface of the second rectangular tube 3. The nozzles 4 arrayed on adjacent second rectangular tubes 3 are staggered. This staggered distribution of the nozzles 4 minimizes the blowing at the four corners, preventing overlapping of blowing areas.

[0040] In order to achieve the effect of pulse jet blowing, an electromagnetic pulse valve 5 is fixedly installed on the surface of the first rectangular tube 2 to control the release of air pressure pulses in the second rectangular tube 3.

[0041] Specifically, pulse jet blowing is achieved as follows: By controlling the movement of the armature of the electromagnetic pulse valve 5, the vent hole in the rear air chamber of the electromagnetic pulse valve 5 opens. Then, the vocal cords in the rear air chamber lose pressure, the diaphragm moves backward, and compressed air can be ejected from the output port to blow away dust. Compressed air is instantly ejected from the electromagnetic pulse valve 5, forming a pulse jet airflow of a certain intensity.

[0042] Furthermore, the inlet of the blow pipe 1 is provided with a blow section, which mainly consists of an air compressor 11, an air tank 12 and a pulse controller 13, wherein the pulse controller 13 is model SR-PDC-ZC12D.

[0043] The electromagnetic pulse valve 5 is electrically connected to the pulse controller 13, and the operation of the electromagnetic pulse valve 5 is controlled by the electrical signal emitted by the pulse controller 13. The air compressor 11 and the air tank 12 can store the necessary air pressure for blowing dust.

[0044] Furthermore, after the air inlet of the first rectangular tube 2 is connected to the air outlet of the air storage tank 12, the air pressure is controlled by the pulse controller 13 to be ejected from the electromagnetic pulse valve 5. The pulse controller 13 controls the air compressor 11 to store the compressed air into the air storage tank 12. The electromagnetic pulse valve 5 can instantly convert air pressure energy into air jet kinetic energy, which generates a powerful impact force to blow the heat exchanger fins 6 from top to bottom in real time.

[0045] By incorporating a jetting section and an electromagnetic pulse valve 5, the automatically controlled electromagnetic pulse valve 5 instantly converts air pressure energy into air jet kinetic energy, generating a powerful impact force that continuously and directionally blows the heat exchanger fins 6 from top to bottom. This prevents plant fibers, dust, or other small foreign objects adhering to the lower surface of the fins during fan operation from re-attaching. Simultaneously, the slight negative pressure generated by the lower fan 61 transports these particles to the outside of the nacelle, preventing them from re-adhering to the heat exchanger fins 6, thus ensuring the constant cleanliness of the heat exchanger fins 6 surface. This is an environmentally friendly, pollution-free, and low-energy-consumption ideal self-cleaning device for unclogging.

[0046] In order to collect and centrally process the dust after it is blown out, a foreign matter collection section for conveying dust to the outside of the cabin is also provided at the bottom of the heat exchanger fins 6.

[0047] The foreign matter recovery unit mainly consists of a fan 61 and a pipe 62. Dust is sucked out by the negative pressure of the fan 61 and discharged from the pipe 62.

[0048] In order to achieve the effect of blowing dust off the surface of the heat exchanger fins 6 from multiple angles, a jet steering mechanism for controlling the rotation of the second rectangular tube 3 is installed on the first rectangular tube 2.

[0049] Specifically, the steering is achieved as follows: the jet steering mechanism includes a bearing seat 21 fixedly installed on the surface of the first rectangular tube 2, a drive shaft 22 is installed in the inner ring of the bearing in the bearing seat 21, and a worm gear 23 is fixedly sleeved on the surface of the drive shaft 22.

[0050] A worm gear 24 is fixedly sleeved on the outer surface of one end of the second rectangular tube 3. The worm gear 24 meshes with the worm 23 to drive the second rectangular tube 3 to rotate. The meshing of the worm gear 24 and the worm 23 provides a unidirectional transmission effect and precise transmission, thereby enabling precise control of the blowing angle from the outside.

[0051] Furthermore, the drive shaft 22 is cut off at the middle and connected to a dual-output shaft geared motor 25 fixed to the upper surface of the first rectangular tube 2, so that the drive shaft 22 is driven by the dual-output shaft geared motor 25. The dual-output shaft geared motor 25 can shorten the transmission length of a single output shaft geared motor and increase the accuracy of transmission.

[0052] By setting up a jet steering mechanism, dust on the heat exchanger fins 6 can be blown away from multiple angles, and dust on the surface of the second rectangular tube 3 can also be cleaned. Simply turning the nozzle 4 90 degrees can achieve the effect of blowing away dust on the surface of the adjacent second rectangular tube 3.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wind turbine gearbox cooler equipped with a self-cleaning and foreign matter recovery device, comprising a blow pipe (1) installed in the area between the heat exchanger fins (6) and the motor blades (7); Its features are: The inlet of the blow pipe (1) is provided with a blow section. The opposite ends of the two blow pipes (1) are respectively fixedly connected to a first rectangular tube (2). The opposite ends of the first rectangular tubes (2) on both sides are rotatably connected to a second rectangular tube (3) that is not connected to each other. The lower surface of the second rectangular tube (3) is fixedly connected to a nozzle (4). An electromagnetic pulse valve (5) is fixedly installed on the surface of the first rectangular tube (2) to control the release of the air pressure pulse in the second rectangular tube (3); The first rectangular tube (2) is equipped with a jet steering mechanism that controls the rotation of the second rectangular tube (3).

2. The wind turbine generator gearbox cooler according to claim 1 is equipped with a self-cleaning, decontamination, and foreign matter recovery device, characterized in that: The nozzles (4) arrayed on the adjacent second rectangular tube (3) are staggered.

3. The wind turbine generator gearbox cooler according to claim 1 is equipped with a self-cleaning, decontamination, and foreign matter recovery device, characterized in that: By controlling the movement of the armature of the electromagnetic pulse valve (5), the vent hole of the rear air chamber in the electromagnetic pulse valve (5) is opened, and then the vocal cords in the rear air chamber lose pressure, the diaphragm moves backward, and compressed air can blow dust out of the output port.

4. The wind turbine generator gearbox cooler according to claim 3 is equipped with a self-cleaning, decontamination, and foreign matter recovery device, characterized in that: The injection unit mainly consists of an air compressor (11), an air tank (12), and a pulse controller (13). The electromagnetic pulse valve (5) is electrically connected to the pulse controller (13), and the action of the electromagnetic pulse valve (5) is controlled by the electrical signal emitted by the pulse controller (13).

5. The wind turbine generator gearbox cooler according to claim 4 is equipped with a self-cleaning, decontamination, and foreign matter recovery device, characterized in that: After the air inlet of the first rectangular tube (2) is connected to the air outlet of the air storage tank (12), the air pressure is controlled by the pulse controller (13) to spray out from the electromagnetic pulse valve (5), and the pulse controller (13) controls the air compressor (11) to store the compressed air into the air storage tank (12).

6. The wind turbine generator gearbox cooler according to claim 1 is equipped with a self-cleaning, decontamination, and foreign matter recovery device, characterized in that: The bottom of the heat exchanger fins (6) is also provided with a foreign matter recovery section for transporting dust to the outside of the cabin; The foreign matter recovery unit mainly consists of a fan (61) and a pipe (62). Dust is sucked out by the negative pressure of the fan (61) and discharged from the pipe (62).

7. The wind turbine generator gearbox cooler according to claim 6 is equipped with a self-cleaning, decontamination, and foreign matter recovery device, characterized in that: The jet steering mechanism includes a bearing housing (21) fixedly mounted on the surface of the first rectangular tube (2), a drive shaft (22) is mounted on the inner ring of the bearing housing (21), and a worm gear (23) is fixedly sleeved on the surface of the drive shaft (22). A worm gear (24) is fixedly sleeved on the outer surface of one end of the second rectangular tube (3). The worm gear (24) meshes with the worm (23) to drive the second rectangular tube (3) to rotate.

8. The wind turbine generator gearbox cooler according to claim 7 is equipped with a self-cleaning, decontamination, and foreign matter recovery device, characterized in that: The drive shaft (22) is cut off at the middle and connected to a dual-output shaft geared motor (25) fixed on the upper surface of the first rectangular tube (2) so as to drive the drive shaft (22) to perform the action through the dual-output shaft geared motor (25).

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