Wind turbine heat dissipation device and wind turbine generator set

Abstract

The present invention relates to the technical field of wind power generation, and specifically to a heat dissipation device for a wind turbine generator, wherein the wind turbine generator comprises a cabin, wherein a generator is arranged inside the cabin, and the heat dissipation device for the wind turbine generator comprises: a heat dissipation mechanism for the generator, wherein the generator is connected to the heat dissipation mechanism for the generator, and the heat dissipation mechanism for the generator is used to cool and dissipate the heat of the generator. By providing a heat dissipation mechanism for the wind turbine generator, the present invention effectively solves the problem that the cabins of traditional wind turbine generators are mostly in a sealed state, so that the heat generated by the generator, gear transmission and other devices in the cabin cannot be discharged, thereby causing the cabin to overheat and easily causing a fire; some wind turbine generators exchange the air inside and outside the cabin through a ventilation mechanism to dissipate heat, but when the ambient temperature outside the cabin is high, a technical problem of poor heat dissipation effect will occur.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power generator heat sink and a wind power generator set. Background Art

[0002] As a safe, clean and renewable energy source, wind energy is gaining more and more attention. Wind power generation equipment is a power generation equipment that relies on capturing wind energy and converting kinetic energy into electrical energy. In modern large-scale wind turbines, as the power generation of a single unit increases, the heat generated by the components inside the wind turbine is increasing. It is necessary to dissipate the heat inside the wind turbine to ensure that the wind turbine can operate safely and without failure.

[0003] The cabins of traditional wind turbines are mostly sealed, so that the heat generated by the generator, gearbox and other devices in the cabin cannot be discharged, which causes the cabin to overheat and easily causes fires; some wind turbines exchange the air inside and outside the cabin through a ventilation mechanism to dissipate heat, such as CN108518309B discloses an intelligent wind turbine with strong climate adaptability based on the Internet of Things, but when the external ambient temperature of the cabin is high, the heat dissipation effect will be poor. Therefore, in view of the above situation, it is urgent to develop a wind turbine heat dissipation device and a wind turbine generator set to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The purpose of the present invention is to provide a heat dissipation device for a wind turbine generator to solve the technical problems raised in the above-mentioned background technology: the cabins of traditional wind turbine generators are mostly in a sealed state, so that the heat generated by the generator, gear box and other devices in the cabin cannot be discharged, thereby causing the cabin to overheat and easily cause a fire; some wind turbines exchange the air inside and outside the cabin through a ventilation mechanism to dissipate heat, such as CN108518309B discloses an intelligent wind turbine generator with strong climate adaptability based on the Internet of Things, but when the external ambient temperature of the cabin is high, the problem of poor heat dissipation will occur.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a heat dissipation device for a wind turbine generator, the wind turbine generator includes a nacelle, a generator is arranged inside the nacelle, the heat dissipation device for the wind turbine generator includes: a generator heat dissipation mechanism, the generator is connected to the generator heat dissipation mechanism, and the generator heat dissipation mechanism is used to cool and dissipate the heat of the generator.

[0006] Preferably, the generator heat dissipation mechanism includes: a plurality of heat sinks, the heat sinks are fixedly mounted on the outside of the generator, the bottom ends of the heat sinks are fixedly mounted on the inner wall of the cabin, a liquid storage tank is fixedly mounted on the inner wall of the cabin, and a delivery pump is fixedly mounted in the liquid storage tank, the output end of the delivery pump is fixedly mounted on one end of a connecting pipe, the other end of the connecting pipe passes through the liquid storage tank and is connected to one end of a heat dissipation pipe, the other end of the heat dissipation pipe is connected to an input end of a radiator, the output end of the radiator is connected to the liquid storage tank, and the heat dissipation pipe is wound around the generator, and coolant is stored in the liquid storage tank.

[0007] Preferably, a plurality of through holes are provided at the left end of the cabin, a filter screen 1 is provided in the through holes, an exhaust duct is provided at the rear end of the cabin, a filter screen 2 is fixedly installed in the exhaust duct, and a temperature sensor 3 is fixedly installed on the inner wall of the cabin at the top of the generator.

[0008] Preferably, the wind turbine heat sink further comprises:

[0009] A flow rate sensor, used to detect the flow rate of coolant in the radiator;

[0010] A first temperature sensor, used to detect the temperature of the coolant when it is output from the radiator;

[0011] A second temperature sensor is used to detect the temperature of the coolant when it is input from the radiator;

[0012] A controller and an alarm, wherein the controller is electrically connected to the flow rate sensor, the first temperature sensor, the second temperature sensor and the alarm, and the controller controls the alarm to work based on the flow rate sensor, the first temperature sensor and the second temperature sensor, including the following steps:

[0013] Step 1: Calculate the convective heat transfer coefficient λ of the radiator to the coolant in the heat pipe according to formula (1), the flow rate sensor, the first temperature sensor and the second temperature sensor detection values. 1 :

[0014]

[0015] Where D is the diameter of the pipe where the radiator and the heat pipe are connected, V is the detection value of the flow velocity sensor, ρ z is the density of the coolant, α is the dynamic viscosity of the coolant, g is the acceleration of gravity, δ is the volume expansion coefficient of the coolant, T 1 is the detection value of the first temperature sensor, T 2 is the detection value of the second temperature sensor, X is the length of the heat sink in the radiator, Y is the width of the heat sink in the radiator, Z is the height of the heat sink in the radiator, β is the kinematic viscosity of the coolant, μ 1 is the thermal conductivity of the coolant, μ 2is the thermal conductivity of the heat sink material in the radiator;

[0016] Step 2: According to the following formula (2), the total heat dissipation Q of the radiator is calculated. The controller compares the total heat dissipation Q of the radiator with the preset heat dissipation range. When the actual total heat dissipation is lower than the preset heat dissipation range, the controller controls the alarm to sound an alarm:

[0017] Q=(λ 1 +λ 2 )×A×(T 2 -T 1 ) (2)

[0018] Where A is the heat transfer area of ​​the radiator, λ 2 is the radiation heat transfer coefficient of the radiator.

[0019] A wind turbine generator set, the wind turbine generator set also includes: a base, a tower is fixedly installed on the top of the base, a power storage box is fixedly installed on the base, a cabin is fixedly installed on the top of the tower, a power generation component is arranged in the cabin, and the power generation component is connected to the impeller.

[0020] Preferably, the power generation assembly includes: a gear transmission, the left side of the gear transmission passes through the cabin and is fixedly connected to the impeller, the right side of the gear transmission is connected to the generator shaft, and a shock-absorbing block is fixedly installed between the bottom end of the gear transmission and the inner wall of the cabin.

[0021] Preferably, the impeller is composed of a plurality of blades and a hub, and the hub is connected to a rotating shaft of a gear box, and the plurality of blades are fixedly mounted on the hub by bolts.

[0022] Preferably, a dust removal and cooling mechanism is also provided in the cabin, and the dust removal and cooling mechanism includes: a dust removal box, the dust removal box is fixedly mounted on the inner wall of the bottom end of the cabin, and the top end of the dust removal box is fixedly mounted on one end of the partition, and the other end of the partition is fixedly mounted on the inner wall of the top end of the cabin, and a drive assembly is provided in the dust removal box, and the drive assembly is connected to the pressurizing assembly and the dust handling assembly.

[0023] The driving assembly includes: a driving motor, which is fixedly mounted on the right inner wall of a cavity provided in the dust removal box, and a rotating shaft 1 is fixedly mounted on the output shaft of the driving motor, and a bevel gear 1 and a bevel gear 2 are fixedly mounted on the rotating shaft 1 from left to right, respectively, the bevel gear 1 is connected to the pressurizing assembly, and the bevel gear 2 is connected to the dust handling assembly.

[0024] Preferably, the pressurizing assembly includes: bevel gear three, the bevel gear three is meshingly connected with the bevel gear one, a threaded rod is fixedly installed on the top of the bevel gear three, the threaded rod passes through cavity two set at the top of the left side of the dust removal box, and the threaded rod is rotatably connected to the inner wall of cavity two, and a piston is threadedly connected to the threaded rod, the piston is slidably connected to the inner wall of cavity two up and down, and the left side of cavity two is fixedly installed on one end of connecting pipe two, the other end of connecting pipe two is connected to the output end of the air pump, the input end of the air pump is connected to the ventilation pipe, and a plurality of air nozzles are fixedly installed on the ventilation pipe, and a reverse flow valve one is provided in the connecting pipe two, and the right end of cavity two is connected to the dust handling assembly.

[0025] Preferably, the dust processing component includes: bevel gear four, which is meshingly connected with bevel gear two, the top end of bevel gear four is fixedly connected to rotating shaft two, and the top end of rotating shaft two is rotatably connected to the inner wall of cavity three arranged on the right side of dust removal box, and a rotating plate is fixedly installed on rotating shaft two, one end of connecting pipe three is connected to cavity two, and the other end of connecting pipe three is connected to the bottom end of cavity three, and a reverse flow valve two is fixedly installed in connecting pipe three, and an exhaust pipe is fixedly installed on the dust removal box at the top end of cavity three.

[0026] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram;

[0029] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of point A in the middle.

[0030] In the figure: 1, cabin; 2, generator; 3, heat sink; 4, liquid storage tank; 5, delivery pump; 6, connecting pipe 1; 7, radiator; 8, heat pipe; 9, ventilation pipe; 10, air nozzle; 11, through hole; 12, temperature sensor 3; 13, filter screen 1; 14, filter screen 2; 15, base; 16, tower; 17, impeller; 171, blade; 172, wheel hub; 18, gear box; 19, shock absorber block; 20, battery box; 2 1. Dust removal box; 22. Partition; 23. Drive motor; 24. Cavity 1; 25. Rotating shaft 1; 26. Bevel gear 1; 27. Bevel gear 2; 28. Bevel gear 3; 29. ​​Threaded rod; 30. Cavity 2; 31. Piston; 32. Connecting pipe 2; 33. Air pump; 34. Exhaust pipe; 35. Bevel gear 4; 36. Rotating shaft 2; 37. Cavity 3; 38. Rotating plate; 39. Connecting pipe 3; 40. Backflow valve 2; 41. Backflow valve 1. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. In addition, the terms "first", "second", "third", "upper, lower, left, right", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] The present invention provides a wind turbine heat sink, such as Figure 1 As shown, the wind turbine generator includes a nacelle 1, a generator 2 is arranged inside the nacelle 1, and the heat dissipation device of the wind turbine generator includes: a generator heat dissipation mechanism, the generator 2 is connected to the generator heat dissipation mechanism, and the generator heat dissipation mechanism is used to cool and dissipate the generator 2.

[0034] The beneficial effects of the above technical solution are as follows: the present invention provides a heat dissipation mechanism for the wind turbine. When the surface temperature of the wind turbine is too high, the heat dissipation mechanism of the generator is started to continuously cool the surface of the generator, thereby effectively solving the problem that the cabin of traditional wind turbines is mostly in a sealed state, so that the heat generated by the generator, gear box and other devices in the cabin cannot be discharged, thereby causing the cabin to overheat and easily cause a fire; in addition, traditional heat dissipation of wind turbines mainly relies on the circulation of impellers and wind to achieve internal cooling. However, during the operation of the wind turbine, a lot of heat will be generated, and the heat will accumulate inside the equipment, and the efficiency of heat dissipation by air cooling alone is not very high. Technical problem.

[0035] Embodiment 2:

[0036] On the basis of Example 1, the generator heat dissipation mechanism includes: a plurality of heat sinks 3, the heat sinks 3 are fixedly mounted on the outside of the generator 2, the bottom ends of the heat sinks 3 are fixedly mounted on the inner wall of the cabin 1, a liquid storage tank 4 is fixedly mounted on the inner wall of the cabin 1, and a delivery pump 5 is fixedly mounted in the liquid storage tank 4, the output end of the delivery pump 5 is fixedly mounted on one end of a connecting pipe 6, the other end of the connecting pipe 6 passes through the liquid storage tank 4 and is connected to one end of a heat dissipation pipe 8, the other end of the heat dissipation pipe 8 is connected to an input end of a radiator 7, the output end of the radiator 7 is connected to the liquid storage tank 4, and the heat dissipation pipe 8 is wound around the generator 2, and coolant is stored in the liquid storage tank 4.

[0037] Optionally, a plurality of through holes 11 are provided at the left end of the cabin 1, a filter 13 is provided in the through hole 11, an exhaust duct is provided at the rear end of the cabin 1, a filter 2 14 is fixedly installed in the exhaust duct, and a temperature sensor 3 12 is fixedly installed on the inner wall of the cabin 1 at the top of the generator 2.

[0038] The working principle of the above technical solution is as follows: when the generator 2 needs to be cooled, high-altitude cold air will enter the cabin 1 through the through hole 11, thereby effectively cooling the generator 2, and the heat sinks 3 provided on both sides of the generator 2 will further cool the generator 2. When the temperature of the surface of the generator 2 detected by the temperature sensor 3 12 is higher than the preset temperature upper limit, the delivery pump 5 and the radiator 7 are started, and the delivery pump 5 delivers the coolant in the liquid storage tank 4 to the surface of the generator 2 through the connecting pipe 1 6 and the heat dissipation pipe 8, thereby absorbing the heat generated on the surface of the generator 2, and then the coolant after absorbing the heat is fully cooled by the radiator 7, and then flows back to the liquid storage tank 4, and is cooled again by the delivery pump 5, thereby realizing a cyclic cooling treatment.

[0039] The beneficial effects of the above technical scheme are as follows: by setting a plurality of through holes 11, it is beneficial to naturally cool down the generator 2 through high-altitude cold air, so that the generator 2 is cooled down under the action of natural wind; by setting a plurality of filter nets 13, it is beneficial to filter the high-altitude cold air entering the cabin 1 to prevent dust from entering the cabin 1 and damaging the mechanical parts in the cabin 1; by setting an exhaust pipe and a filter net 2 14, it is beneficial to discharge hot air; by setting a temperature sensor 3 12, it is beneficial to monitor the temperature in the cabin 1 in real time, and when the temperature in the cabin 1 is higher than the preset value, the heat dissipation mechanism is controlled to start; by setting a heat dissipation plate 3, it is beneficial to absorb heat for the generator 2; by setting a delivery pump 5 and a radiator 7, it is beneficial to cool down the coolant in the heat dissipation pipe 8 provided on the surface of the generator 2 under the action of the radiator 7, thereby realizing secondary cooling of the surface of the generator 2.

[0040] Embodiment 3:

[0041] On the basis of Embodiment 1-2, a heat dissipation device for a wind turbine generator is provided, wherein the radiator 7 may be a radiator disclosed in CN1580681. The present invention delivers a coolant (which may be water, distilled water, a mixture of ethylene glycol and water) from a liquid storage tank 4 to a connecting pipe 6 through a delivery pump 5, and then delivers the coolant to a heat dissipation pipe 8 through a connecting pipe 6, and then the heat generated by the generator 2 is transferred to the coolant through the heat dissipation pipe 8. When the coolant is delivered to the radiator 7 through the heat dissipation pipe 8 (the radiator 7 is usually made of metal (such as aluminum, copper, etc.), and uses fins or large-area heat sinks to increase the heat dissipation surface area and promote heat dissipation), the radiator 7 effectively cools the coolant with heat, and finally flows back to the liquid storage tank 4, and is delivered again through the delivery pump 5, and the operation is repeated in this way to effectively cool the generator 2, and further includes:

[0042] A flow rate sensor, used to detect the flow rate of the coolant in the radiator 7;

[0043] A first temperature sensor, used to detect the temperature of the coolant when it is output from the radiator 7;

[0044] A second temperature sensor is used to detect the temperature of the coolant when it is input from the radiator 7;

[0045] A controller and an alarm, wherein the controller is electrically connected to the flow rate sensor, the first temperature sensor, the second temperature sensor and the alarm, and the controller controls the alarm to work based on the flow rate sensor, the first temperature sensor and the second temperature sensor, including the following steps:

[0046] Step 1: Calculate the convection heat transfer coefficient λ of the radiator 7 to the coolant in the heat pipe 8 according to formula (1), the flow rate sensor, the first temperature sensor and the second temperature sensor detection values. 1 :

[0047]

[0048] Where D is the pipe diameter at the connection between the radiator 7 and the heat pipe 8, V is the detection value of the flow velocity sensor, ρ z is the density of the coolant (in kg / m 3 ), α is the dynamic viscosity of the coolant (in Pa·s), g is the acceleration of gravity, δ is the volume expansion coefficient of the coolant, T 1 is the detection value of the first temperature sensor, T 2 is the detection value of the second temperature sensor, X is the length of the heat sink in the radiator 7, Y is the width of the heat sink in the radiator 7, Z is the height of the heat sink in the radiator 7, β is the kinematic viscosity of the coolant, μ 1 is the thermal conductivity of the coolant, μ 2 is the thermal conductivity of the heat sink material in the heat sink 7, is the Reynolds number, represents the modified Grashof number of the heat sink in the heat sink 7 (used to characterize the relative importance between viscosity and inertia of fluid flow);

[0049] Step 2: According to the following formula (2), the total heat dissipation Q of the radiator 7 is calculated. The controller compares the total heat dissipation Q of the radiator 7 with the preset heat dissipation range. When the actual total heat dissipation is lower than the preset heat dissipation range, the controller controls the alarm to sound an alarm:

[0050] Q=(λ 1 +λ 2 )×A×(T 2 -T 1 ) (2)

[0051] Where A is the heat transfer area of ​​the heat sink 7, λ 2 is the radiation heat transfer coefficient of the radiator 7 (unit: W / (m 2 ·K)).

[0052] The beneficial effects of the above technical solution are as follows: according to the flow rate sensor, the first temperature sensor, and the second temperature sensor detection values, the convective heat transfer coefficient of the radiator 7 to the coolant in the heat pipe 8 is calculated, and then by comprehensively considering the pipe diameter at the connection between the radiator 7 and the heat pipe 8, the density of the coolant, the dynamic viscosity of the coolant, the gravitational acceleration, the volume expansion coefficient of the coolant, the length of the heat sink in the radiator 7, the width of the heat sink in the radiator 7, the height of the heat sink in the radiator 7, the kinematic viscosity of the coolant, the thermal conductivity of the coolant, and the thermal conductivity of the heat sink material in the radiator 7, the calculation result is more accurate and reliable;

[0053] Then, according to formula (2), the heat transfer area of ​​the radiator 7 and the radiation heat transfer coefficient of the radiator 7, the total heat dissipation of the radiator 7 is calculated, so that the calculation result is more accurate and reliable.

[0054] The controller works based on the flow rate sensor, the first temperature sensor, and the second temperature sensor. The controller compares the total heat dissipation of the radiator 7 with the preset heat dissipation range. When the actual heat dissipation is lower than the preset heat dissipation range, the controller controls the alarm to sound an alarm, thereby reminding the staff to increase the output power of the radiator 7 or speed up the flow rate of the coolant in the heat pipe 8, thereby improving the heat dissipation efficiency, thereby meeting the user's needs for a wind turbine heat dissipation device and a wind turbine generator set.

[0055] Embodiment 4:

[0056] On the basis of Examples 1-3, a wind turbine generator set is provided, the wind turbine generator set further comprising: a base 15, a tower 16 is fixedly mounted on the top of the base 15, a battery box 20 is fixedly mounted on the base 15, the top of the tower 16 is fixedly mounted on a nacelle 1, a power generation component is provided in the nacelle 1, and the power generation component is connected to an impeller 17.

[0057] Optionally, the power generation component includes: a gear transmission 18, the left side of the gear transmission 18 passes through the cabin 1 and is fixedly connected to the impeller 17, the right side of the gear transmission 18 is connected to the rotating shaft of the generator 2, and a shock-absorbing block 19 is fixedly installed between the bottom end of the gear transmission 18 and the inner wall of the cabin 1.

[0058] Optionally, the impeller 17 is composed of a plurality of blades 171 and a hub 172 , and the hub 172 is connected to the rotating shaft of the gear box 18 , and the plurality of blades 171 are fixedly mounted on the hub 172 by bolts.

[0059] The working principle and beneficial effects of the above technical solution are as follows: when wind power generation is required, the wind drives the blades 171 and the hub 172 connected thereto to rotate, and the rotation of the hub 172 drives the gearbox 18 connected to its rotating shaft to rotate, thereby driving the generator 2 to rotate under the action of the gearbox 18, thereby converting mechanical energy into kinetic energy under the action of the generator 2, and storing the electrical energy generated by the generator 2 in the storage box 20, thereby realizing the conversion of electrical energy. By providing the shock-absorbing block 19, it is beneficial to effectively reduce the vibration of the gearbox 18 to prevent excessive vibration from affecting the wind turbine generator set.

[0060] Embodiment 5:

[0061] On the basis of Examples 1-4, Figure 2-3 As shown, a wind turbine generator set is further provided with a dust removal and cooling mechanism in the nacelle 1, and the dust removal and cooling mechanism includes: a dust removal box 21, the dust removal box 21 is fixedly mounted on the inner wall of the bottom end of the nacelle 1, and the top end of the dust removal box 21 is fixedly mounted on one end of a partition 22, and the other end of the partition 22 is fixedly mounted on the inner wall of the top end of the nacelle 1, and a driving component is provided in the dust removal box 21, and the driving component is connected to the pressurizing component and the dust handling component.

[0062] The driving assembly includes: a driving motor 23, the driving motor 23 is fixedly mounted on the right inner wall of the cavity 24 provided in the dust removal box 21, and the output shaft of the driving motor 23 is fixedly mounted with a rotating shaft 25, and the rotating shaft 25 is fixedly mounted with a bevel gear 26 and a bevel gear 2 27 from left to right, respectively, the bevel gear 1 26 is connected to the pressurizing assembly, and the bevel gear 2 27 is connected to the dust handling assembly.

[0063] Optionally, the pressurizing component includes: bevel gear three 28, the bevel gear three 28 is meshingly connected with the bevel gear one 26, a threaded rod 29 is fixedly installed on the top of the bevel gear three 28, the threaded rod 29 passes through the cavity two 30 set at the top of the left side of the dust removal box 21, and the threaded rod 29 is rotatably connected to the inner wall of the cavity two 30, and a piston 31 is threadedly connected to the threaded rod 29, the piston 31 is slidably connected to the inner wall of the cavity two 30 up and down, and the left side of the cavity two 30 is fixedly installed on one end of the connecting pipe two 32, the other end of the connecting pipe two 32 is connected to the output end of the air pump 33, the input end of the air pump 33 is connected to the ventilation pipe 9, and a plurality of air nozzles 10 are fixedly installed on the ventilation pipe 9, and a reverse flow valve one 41 is provided in the connecting pipe two 32, and the right end of the cavity two 30 is connected to the dust handling component.

[0064] Optionally, the dust processing component includes: a bevel gear four 35, the bevel gear four 35 is meshingly connected with the bevel gear two 27, the top of the bevel gear four 35 is fixedly connected to the rotating shaft two 36, and the top of the rotating shaft two 36 is rotatably connected to the inner wall of the cavity three 37 set on the right side of the dust removal box 21, and a rotating plate 38 is fixedly installed on the rotating shaft two 36, one end of the connecting pipe three 39 is connected to the cavity two 30, and the other end of the connecting pipe three 39 is connected to the bottom end of the cavity three 37, and a reverse flow valve two 40 is fixedly installed in the connecting pipe three 39, and an exhaust pipe 34 is fixedly installed on the dust removal box 21 at the top of the cavity three 37.

[0065] The working principle of the above technical solution is as follows: after the high-altitude air enters the cabin 1 from the through hole 11, although it is filtered by the filter 13, some dust will occasionally enter the cabin 1, thereby affecting the generator 2 and other components in the cabin 1. When it is necessary to deal with the dust in the cabin 1, the drive motor 23 and the air pump 33 are started, and the drive motor 23 rotates to drive the bevel gear 1 26 and the bevel gear 27 to rotate, and the bevel gear 1 26 and the bevel gear 27 rotate to drive the bevel gear 3 28 and the bevel gear 4 35 meshing therewith to rotate, and the bevel gear 3 28 rotates to drive the threaded rod 29 to rotate accordingly, and the threaded rod 29 rotates to rotate accordingly. The rotation of rod 29 drives piston 31 to move up and down. When the air pump 33 sucks the dust in cabin 1 and the hot air in cabin 1 from ventilation pipe 9 through several air nozzles 10, and then enters into cavity 2 30 through connecting pipe 2 32, piston 31 moves upward to drive the dust gas into cavity 3 37 through connecting pipe 3 39, and then drives rotating plate 38 to rotate through rotating shaft 2 36, so that the dust gas is fully absorbed into the liquid in cavity 3 37, thereby absorbing the dust gas, and through ventilation pipe 9 and air nozzle 10, it is helpful to fully extract the gas in cabin 1, and the filtered dust gas is discharged through exhaust pipe 34.

[0066] The beneficial effects of the above technical solution are as follows: by setting a driving component, it is conducive to driving the operation of the pressurizing component and the dust processing component, so as to process the dust gas in the cabin 1; by setting a plurality of air nozzles 10 and an air pump 33, it is conducive to fully extracting the dust gas in the cabin 1, and while processing the dust gas, the hot air in the cabin 1 will be sucked along with it, so as to cool it down through the liquid in the cavity three 37; by setting a reverse flow valve one 41 and a reverse flow valve two 40, it is conducive to the discharge of dust gas from the connecting pipe two 32 during the pressurization process, and further prevents the liquid in the cavity three 37 from flowing back into the cavity two 30 through the connecting pipe three 39; by setting a rotating shaft two 36 and a rotating plate 38, it is conducive to the sedimentation treatment of the dust gas; by reversing the driving motor 23, it is conducive to driving the piston 31 up and down under the action of the driving motor 23, so as to achieve the effect of pressurization; by setting an exhaust pipe 34, it is conducive to discharging the treated gas, which is very convenient and practical.

[0067] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A heat dissipation device for a wind turbine generator, the wind turbine generator comprising a nacelle (1), a generator (2) being arranged inside the nacelle (1), characterized in that: The wind turbine generator heat dissipation device comprises: a generator heat dissipation mechanism, the generator (2) is connected to the generator heat dissipation mechanism, and the generator heat dissipation mechanism is used to cool and dissipate heat for the generator (2); The generator heat dissipation mechanism comprises: a plurality of heat dissipation plates (3), the heat dissipation plates (3) are fixedly mounted on the outside of the generator (2), the bottom end of the heat dissipation plates (3) is fixedly mounted on the inner wall of the cabin (1), a liquid storage tank (4) is fixedly mounted on the inner wall of the cabin (1), and a delivery pump (5) is fixedly mounted in the liquid storage tank (4), the output end of the delivery pump (5) is fixedly mounted on one end of a connecting pipe (6), the other end of the connecting pipe (6) passes through the liquid storage tank (4) and is connected to one end of a heat dissipation pipe (8), the other end of the heat dissipation pipe (8) is connected to the input end of a radiator (7), the output end of the radiator (7) is connected to the liquid storage tank (4), and the heat dissipation pipe (8) is wound around the generator (2), and the liquid storage tank (4) stores coolant; Also includes: A flow rate sensor, used for detecting the flow rate of the coolant in the radiator (7); A first temperature sensor, used for detecting the temperature of the coolant when it is output from the radiator (7); A second temperature sensor, used for detecting the temperature of the coolant when it is input from the radiator (7); A controller and an alarm, wherein the controller is electrically connected to the flow rate sensor, the first temperature sensor, the second temperature sensor and the alarm, and the controller controls the alarm to work based on the flow rate sensor, the first temperature sensor and the second temperature sensor, including the following steps: Step 1: According to formula (1), the detection values ​​of the flow rate sensor, the first temperature sensor and the second temperature sensor, the convection heat transfer coefficient λ1 of the radiator (7) to the coolant in the heat pipe (8) is calculated: Where D is the diameter of the pipe where the radiator (7) and the heat pipe (8) are connected, V is the detection value of the flow velocity sensor, and ρ z is the density of the coolant, α is the dynamic viscosity of the coolant, g is the gravitational acceleration, δ is the volume expansion coefficient of the coolant, T1 is the detection value of the first temperature sensor, T2 is the detection value of the second temperature sensor, X is the length of the heat sink in the radiator (7), Y is the width of the heat sink in the radiator (7), Z is the height of the heat sink in the radiator (7), β is the kinematic viscosity of the coolant, μ1 is the thermal conductivity of the coolant, and μ2 is the thermal conductivity of the heat sink material in the radiator (7); Step 2: According to the following formula (2), the total heat dissipation Q of the radiator (7) is calculated. The controller compares the total heat dissipation Q of the radiator (7) with the preset heat dissipation range. When the actual total heat dissipation is lower than the preset heat dissipation range, the controller controls the alarm to sound an alarm: Q=(λ1+λ2)×A×(T2-T1) (2) Wherein A is the heat transfer area of ​​the radiator (7), and λ2 is the radiation heat transfer coefficient of the radiator (7).

2. A wind turbine heat sink according to claim 1, characterized in that: The left end of the cabin (1) is provided with a plurality of through holes (11), a filter screen one (13) is provided in the through hole (11), and an exhaust pipe is provided at the rear end of the cabin (1), a filter screen two (14) is fixedly installed in the exhaust pipe, and a temperature sensor three (12) is fixedly installed on the inner wall of the cabin (1) at the top of the generator (2).

3. A wind turbine generator set, comprising a wind turbine generator heat dissipation device as claimed in any one of claims 1 to 2, characterized in that: The wind turbine generator set further comprises: a base (15), a tower (16) is fixedly mounted on the top of the base (15), a power storage box (20) is fixedly mounted on the base (15), a nacelle (1) is fixedly mounted on the top of the tower (16), a power generation assembly is arranged in the nacelle (1), and the power generation assembly is connected to an impeller (17).

4. A wind turbine generator set according to claim 3, characterized in that: The power generation assembly comprises: a gear transmission (18), the left side of the gear transmission (18) passes through the cabin (1) and is fixedly connected to the impeller (17), the right side of the gear transmission (18) is connected to the rotating shaft of the generator (2), and a shock absorbing block (19) is fixedly installed between the bottom end of the gear transmission (18) and the inner wall of the cabin (1).

5. A wind turbine generator set according to claim 4, characterized in that: The impeller (17) is composed of a plurality of blades (171) and a hub (172), and the hub (172) is connected to the rotating shaft of the gear transmission box (18), and the plurality of blades (171) are fixedly mounted on the hub (172) by bolts.

6. A wind turbine generator set according to claim 3, characterized in that: The cabin (1) is also provided with a dust removal and cooling mechanism, the dust removal and cooling mechanism comprising: a dust removal box (21), the dust removal box (21) is fixedly mounted on the inner wall of the bottom end of the cabin (1), and the top end of the dust removal box (21) is fixedly mounted on one end of a partition (22), and the other end of the partition (22) is fixedly mounted on the inner wall of the top end of the cabin (1), and a driving component is provided in the dust removal box (21), and the driving component is connected to a pressurizing component and a dust handling component.

7. A wind turbine generator set according to claim 6, characterized in that: The pressurizing assembly comprises: a bevel gear three (28), the bevel gear three (28) being meshedly connected with the bevel gear one (26), a threaded rod (29) being fixedly mounted on the top of the bevel gear three (28), the threaded rod (29) passing through a cavity two (30) provided at the top of the left side of the dust removal box (21), and the threaded rod (29) being rotatably connected with the inner wall of the cavity two (30), and a piston (31) being threadedly connected to the threaded rod (29), and the piston (31) sliding up and down. The second cavity (30) is movably connected to the inner wall of the second cavity (30), and the left side of the second cavity (30) is fixedly installed on one end of the second connecting pipe (32), the other end of the second connecting pipe (32) is connected to the output end of the air pump (33), the input end of the air pump (33) is connected to the ventilation pipe (9), and a plurality of air nozzles (10) are fixedly installed on the ventilation pipe (9), and a reverse flow valve (41) is provided in the second connecting pipe (32), and the right end of the second cavity (30) is connected to the dust handling component.

8. A wind turbine generator set according to claim 7, characterized in that: The dust processing assembly comprises: a bevel gear four (35), the bevel gear four (35) is meshedly connected with the bevel gear two (27), the top end of the bevel gear four (35) is fixedly connected with the rotating shaft two (36), and the top end of the rotating shaft two (36) is rotatably connected to the inner wall of the cavity three (37) provided on the right side of the dust removal box (21), and a rotating plate (38) is fixedly installed on the rotating shaft two (36), one end of the connecting pipe three (39) is connected to the cavity two (30), and the other end of the connecting pipe three (39) is communicated with the bottom end of the cavity three (37), and a reverse flow valve two (40) is fixedly installed in the connecting pipe three (39), and an exhaust pipe (34) is fixedly installed on the dust removal box (21) at the top end of the cavity three (37).

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