CN223136321U - A heat dissipation device for a wind turbine pitch control system - Google Patents

Abstract

The application relates to the technical field of heat dissipation, in particular to a heat dissipation device of a wind driven generator pitch system; the PCB comprises a PCB board, a cooling assembly and a heat dissipation assembly; the utility model is closely attached and installed on the front side of the cooling component through the PCB; the front side of the PCB is provided with a heat dissipation component; therefore, the front surface and the rear surface of the PCB can be simultaneously radiated through the cooling component and the radiating component; thus greatly improving the heat dissipation efficiency of the PCB; meanwhile, the heat radiation fan disclosed by the utility model is used for accelerating the airflow in the gap between the grid plates so as to cool the coolant rapidly; meanwhile, under the action of the heat radiation fan on the suction of the rear side air flow, the air flow in the gap of the mounting plate can be accelerated; so that the cold air first passes through the gaps of the fins and then the air again passes through the louvers to carry heat from the relatively high temperature coolant interior; therefore, the heat dissipation assembly can dissipate heat through the heat dissipation machine, and the heat dissipation grille can also dissipate heat; therefore, the integration of the implementation is further improved, and the space is saved.

Description

Heat abstractor of wind-driven generator variable pitch system

Technical Field

The application relates to the technical field of heat dissipation, in particular to a heat dissipation device of a wind driven generator pitch system.

Background

The fan pitch system is used as one of the core parts of the control system of the large-scale wind turbine generator, and has very important functions on safe, stable and efficient operation of the wind turbine generator. The fan pitch control technology is simple, namely, the pitch angle of the blades is adjusted, the attack angle of air flow to the blades is changed, and then the pneumatic torque and the pneumatic power captured by the wind wheel are controlled. The main components of the motor driver, the backup power supply and the like of the fan pitch system are all arranged in the respective boxes, but because the fan pitch system can work in a high-temperature environment sometimes and the internal devices of the fan pitch system can emit heat in the working process, the boxes of the fan pitch system need to be subjected to necessary heat dissipation treatment.

The PCB board in the pitch system used in the prior art is directly fixed on the box body, so that the fixed side is poor in heat dissipation effect, and meanwhile, the prior art mostly adopts an air cooling or water cooling mode to dissipate heat of the main board, but if one set of heat dissipation system fails, the heat dissipation system cannot normally operate, and the safety is lacked.

Disclosure of utility model

The application aims to overcome the defects in the prior art and provides a heat dissipation device of a wind driven generator pitch system.

The application is realized by the following technical scheme:

The application provides a heat dissipation device of a wind driven generator pitch system, which comprises a PCB, a cooling assembly and a heat dissipation assembly, wherein the PCB is closely and closely installed on the front side of the cooling assembly, the cooling assembly is installed in a control box, the heat dissipation assembly is installed on the front side of the PCB, and the front surface and the rear surface of the PCB can be simultaneously dissipated through the cooling assembly and the heat dissipation assembly.

In an embodiment of the application, the joint between the PCB board and the heat dissipation assembly and the joint between the PCB board and the cooling assembly are fixedly connected by heat dissipation glue.

In an embodiment of the application, the heat dissipation assembly comprises a heat conduction plate, wherein the heat conduction plate is closely attached to the front side of the cooling assembly, fins are arranged on the front side of the heat conduction plate, supporting columns are fixedly arranged at four corners of the heat conduction plate, and a heat dissipation grid is fixedly arranged on the front side of the supporting columns.

In one embodiment of the present application, a plurality of fins are provided, and the plurality of fins are spaced apart from each other.

In one embodiment of the application, the heat radiation grille comprises a water tank, wherein the water tank is fixedly connected with four support columns, a grille plate is arranged in the middle of the water tank, an inner cavity of the water tank is communicated with the grille plate, a mounting plate is arranged at the front side of the grille plate, two extraction openings are symmetrically formed in the middle of the mounting plate, and the front side of the mounting plate is used for mounting a heat radiation fan.

In one embodiment of the application, the heat dissipation fan is provided with two air extraction openings respectively, two groups of liquid outlets and liquid inlets are respectively arranged on the upper side and the lower side of one end of the water tank, and a one-way valve is arranged in each liquid outlet and liquid inlet, wherein the direction of the one-way valve is consistent with that of the liquid inlet and liquid outlet.

In one embodiment of the application, the cooling assembly comprises a fixed plate, wherein a first cooling coil and a second cooling coil are arranged in the fixed plate, two groups of first liquid inlets and first liquid outlets are respectively arranged on the upper side and the lower side of one end of the fixed plate, the first liquid inlets are respectively connected and communicated with one ends of the first cooling coil and the second cooling coil, the other ends of the first cooling coil and the second cooling coil are respectively connected with the first liquid outlets, and the first liquid inlets and the second liquid outlets and the second liquid inlets are respectively connected through communicating pipes.

In one embodiment of the application, the communicating pipe comprises an S pipe and a U-shaped pipe, wherein the two liquid inlets I and the liquid outlets II are respectively communicated through the S pipe and the U-shaped pipe, the same two liquid outlets I and the liquid inlets II are respectively communicated through the S pipe and the U-shaped pipe, and a micro pump is arranged in one of the S pipe and the U-shaped pipe.

In one embodiment of the application, the heat radiation grille and the cooling component are communicated through two groups of S pipes and U-shaped pipes in the communicating pipe, so that two sets of liquid cooling systems are formed.

The application has the beneficial effects that:

1. The PCB is closely attached to the front side of the cooling component, and the front side of the PCB is provided with the heat dissipation component, so that the front surface and the rear surface of the PCB can be simultaneously dissipated by the cooling component and the heat dissipation component;

2. The heat radiation fan disclosed by the utility model is used for accelerating the airflow in the gap between the grid plates so as to cool the coolant rapidly; meanwhile, under the action of the heat radiation fan on the suction of the rear side air flow, the air flow in the gap of the mounting plate can be accelerated; the cooling air firstly carries part of heat absorbed by the heat dissipation component through the gaps of the fins, and then the air carries the heat in the relatively high-temperature coolant through the grid plate again;

3. The cooling grid and the cooling assembly are communicated through the two groups of S pipes and the U-shaped pipes in the communicating pipe, so that two sets of liquid cooling systems are formed, namely, a first cooling coil pipe in the cooling assembly and the cooling grid form a set of circulating cooling system through the U-shaped pipes, and a second cooling coil pipe in the cooling assembly and the cooling grid form another set of circulating cooling system through the S pipes, so that when the cooling operation is performed, only one set of cooling system needs to be started, and the other set of cooling system is used for standby, even if one set of cooling system is damaged, the other set of cooling system can timely replace for performing the cooling effect, and the service performance is greatly improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present application;

FIG. 2 is a front view of the overall structure of the present application;

FIG. 3 is a schematic view of a heat dissipating grille according to the present application;

FIG. 4 is a schematic diagram of a heat dissipating assembly according to the present application;

fig. 5 is a schematic view of the cooling coil structure of the present application.

The cooling device comprises the following components of 1, a PCB board, 11, a water storage base, 12, a guard board, 13, a fixing card, 2, a cooling assembly, 21, a fixing board, 22, a first liquid inlet, 23, a first liquid outlet, 24, a first cooling coil, 25, a second cooling coil, 3, a heat dissipation grid, 31, a water tank, 32, a mounting plate, 33, grid plates, 34, a second liquid inlet, 35, a second liquid outlet, 4, a heat dissipation assembly, 41, a heat conducting board, 42, fins, 43, support columns, 5, a heat dissipation fan, 6, a communicating pipe, 61, an S pipe, 62 and a U-shaped pipe.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element, or be directly connected or indirectly connected to the other element when the element is referred to as being "connected" to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the application, which is defined by the claims, but rather by the claims, unless otherwise indicated, and that any structural modifications, proportional changes, or dimensional adjustments, which would otherwise be apparent to those skilled in the art, would be made without departing from the spirit and scope of the application.

Referring to fig. 1 and 2, the application provides a heat dissipating device of a pitch system of a wind driven generator, comprising a PCB board 1, a cooling component 2 and a heat dissipating component 4, wherein the PCB board 1 is closely attached to the front side of the cooling component 2 (the heat dissipating device is required to be vertically installed, and therefore, the side far away from a mounting surface is the front side), the cooling component 2 is installed on a device, and is generally installed in a control box through screws, the front side of the PCB board 1 is provided with the heat dissipating component 4, and thus, the front and rear sides of the PCB board 1 can be simultaneously cooled through the cooling component 2 and the heat dissipating component 4, so that the heat dissipating efficiency of the PCB board 1 is greatly improved, and meanwhile, compared with the prior art, the heat dissipating device is generally directly arranged on a control cabinet, and the mounting surface, namely the rear side of the PCB board 1 is contacted with the box, so that the heat dissipating effect of the other side is poor;

in order to further improve the rapid transfer of heat generated by the operation of the PCB 1 to the heat dissipation assembly 4 and the cooling assembly 2, the joint of the PCB 1 and the heat dissipation assembly 4 and the joint of the PCB 1 and the cooling assembly 2 are fixedly connected through heat dissipation glue;

Referring to fig. 4, the heat dissipation assembly 4 includes a heat conductive plate 41, wherein the heat conductive plate 41 is closely attached to the front side of the cooling assembly 2, and fins 42 are provided on the front side of the heat conductive plate 41, wherein the fins 42 are used for increasing the contact area with air, so as to further improve the heat dissipation efficiency;

As one implementation, a plurality of fins 42 are arranged, and the fins 42 are arranged at intervals, so that the adjacent fins 42 are used for air flow and heat exchange is facilitated;

Referring to fig. 3, the heat dissipation grille 3 includes a water tank 31, the water tank 31 is fixedly connected with four support columns 43, a grid plate 33 is provided in the middle of the water tank 31, an inner cavity of the water tank 31 is communicated with the grid plate 33, a mounting plate 32 is provided at the front side of the grid plate 33, two air extraction openings are symmetrically provided in the middle of the mounting plate 32, the front side of the mounting plate 32 is used for mounting a heat dissipation fan 5, the heat dissipation fan 5 is provided with two air extraction openings respectively, two sets of two liquid outlets 35 and two liquid inlets 34 are respectively provided at the upper and lower sides of one end of the water tank 31, a one-way valve is provided in each of the two liquid outlets 35 and the two liquid inlets 34, and the direction of the one-way valve is consistent with the liquid inlet 34 and the two liquid outlet 35, so that the coolant is prevented from flowing back;

The heat radiation fan 5 is used for accelerating the airflow in the gap between the opposite grid plates 33 so as to cool the coolant rapidly; meanwhile, under the action of the heat dissipation fan 5 on the suction of the rear side air flow, the air flow in the gap of the mounting plate 32 is accelerated, so that cold air firstly carries part of heat absorbed by the heat dissipation component 4 through the gap of the fins 42, and then the air carries the heat in the relatively high-temperature coolant again through the grid plate 33;

Specifically, coolant in the water tank 31 can enter the water tank 31 through any one of the two liquid inlets 34, wherein a heat dissipation pipeline is arranged in the water tank 31 and passes through the grid plate 33, so that the heat dissipation area of the pipeline is further increased through the heat transmission of the grid plate 33 and the pipeline, and the other end of the pipeline is communicated with the two liquid outlets 35;

Referring to fig. 3 and 5, the cooling assembly 2 includes a fixing plate 21, and a first cooling coil 24 and a second cooling coil 25 are disposed inside the fixing plate 21; wherein, the upper and lower sides of one end of the fixed plate 21 are respectively provided with two groups of first liquid inlets 22 and first liquid outlets 23; the two first liquid inlets 22 are respectively connected and communicated with one ends of the first cooling coil 24 and the second cooling coil 25; the other ends of the first cooling coil 24 and the second cooling coil 25 are respectively connected with the first liquid outlet 23, the first liquid inlet 22 and the second liquid outlet 35 and the first liquid outlet 23 and the second liquid outlet 34 are respectively connected through a communicating pipe 6, the communicating pipe 6 comprises an S pipe 61 and a U-shaped pipe 62, the first liquid inlet 22 and the second liquid outlet 35 are respectively communicated through the S pipe 61 and the U-shaped pipe 62, the first liquid outlet 23 and the second liquid inlet 34 are respectively communicated through the S pipe 61 and the U-shaped pipe 62, a micro pump is arranged in one of the S pipe 61 and the U-shaped pipe 62, so that coolant can be pumped through the micro pump, the heat dissipation grating 3 and the cooling assembly 2 are respectively communicated through the two groups of the S pipes 61 and the U-shaped pipe 62 in the communicating pipe 6, so that two sets of liquid cooling systems are formed, namely the first cooling coil 24 in the cooling assembly 2 is formed into a circulating cooling system through the U-shaped pipe 62 and the heat dissipation grating 3, the second cooling coil 25 in the cooling assembly 2 is formed into another circulating cooling system through the S pipe 61 and the heat dissipation grating 3, the other cooling system is required to be started, and the other cooling system is greatly damaged, and the other cooling system is required to be started, and the other cooling system is greatly damaged.

Working principle:

firstly, when the PCB 1 runs, the heat dissipation fan 5 is started, negative pressure is generated when the heat dissipation fan 5 works to blow air at the back to the outside, so that air flow in a gap of the grid plate 33 can be accelerated to cool a coolant quickly, meanwhile, under the action of sucking air flow at the back side of the heat dissipation fan 5, air flow in a gap of the mounting plate 32 can be accelerated, cold air firstly carries a part of heat absorbed by the heat dissipation component 4 through the gaps of the fins 42, and then the air carries heat in the relatively high-temperature coolant again through the grid plate 33, so that the heat dissipation fan 5 can dissipate heat of the heat dissipation component 4 and also can dissipate heat of the heat dissipation grid 3;

At the same time, the micro pump in the liquid cooling system is started, for example, a circulating cooling system is formed by the second cooling coil 25 in the cooling assembly 2, the S pipe 61 and the heat dissipation grid 3, when the micro pump in the S pipe 61 is started, the coolant in the second cooling coil 25 can be pumped into the water tank 31 from the first liquid outlet 23 through the S pipe 61 connected between the first liquid outlet 23 and the second liquid inlet 34, then the coolant is circularly conveyed into the fixing plate 21 from the second liquid outlet 35 through the S pipe 61 between the second liquid outlet 35 and the first liquid inlet 22, thus realizing the circulation of a liquid cooling system, wherein the coolant in the water tank 31 dissipates heat through the grid plate 33 under the action of the heat dissipation fan 5, and the fixing plate 21 absorbs heat to the PCB 1 through heat conduction, thus realizing the absorption of heat at the rear side of the PCB 1, and the grid 3 dissipates heat to the front side of the PCB 1, thus realizing the double-sided three-dimensional heat dissipation of the PCB 1.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A heat dissipation device of a pitch system of a wind driven generator comprises a PCB (1), a cooling assembly (2) and a heat dissipation assembly (4), and is characterized in that the PCB (1) is closely attached to the front side of the cooling assembly (2), the cooling assembly (2) is arranged in a control box, the heat dissipation assembly (4) is arranged on the front side of the PCB (1), and heat can be dissipated to the front surface and the rear surface of the PCB (1) simultaneously through the cooling assembly (2) and the heat dissipation assembly (4).

2. The heat dissipating device of a pitch system of a wind driven generator according to claim 1, wherein the joint of the PCB board (1) and the heat dissipating component (4) and the joint of the PCB board (1) and the cooling component (2) are fixedly connected by heat dissipating glue.

3. The heat dissipation device of a wind driven generator pitch system according to claim 2, wherein the heat dissipation assembly (4) comprises a heat conduction plate (41), the heat conduction plate (41) is closely attached to the front side of the cooling assembly (2), fins (42) are arranged on the front side of the heat conduction plate (41), supporting columns (43) are fixedly arranged at four corners of the heat conduction plate (41), and a heat dissipation grid (3) is fixedly arranged on the front side of the supporting columns (43).

4. A heat sink for a pitch system of a wind turbine according to claim 3, wherein a plurality of fins (42) are provided, the plurality of fins (42) being arranged at intervals.

5. The heat dissipation device of the wind driven generator pitch system according to claim 3 is characterized in that the heat dissipation grid (3) comprises a water tank (31), the water tank (31) is fixedly connected with four support columns (43), a grid plate (33) is arranged in the middle of the water tank (31), an inner cavity of the water tank (31) is communicated with the grid plate (33), an installation plate (32) is arranged on the front side of the grid plate (33), two extraction openings are symmetrically formed in the middle of the installation plate (32), and the front side of the installation plate (32) is used for installing a heat dissipation fan (5).

6. The heat dissipation device of a wind driven generator pitch system according to claim 5, wherein the heat dissipation fan (5) is provided with two heat dissipation fans which are respectively arranged on two air extraction openings, two groups of liquid outlets (35) and liquid inlets (34) are respectively arranged on the upper side and the lower side of one end of the water tank (31), one-way valves are arranged in the liquid outlets (35) and the liquid inlets (34), and the direction of conduction of the one-way valves is consistent with that of the liquid inlets (34) and the liquid outlets (35).

7. The heat dissipation device of the wind driven generator pitch system according to claim 6, wherein the cooling assembly (2) comprises a fixed plate (21), a first cooling coil (24) and a second cooling coil (25) are arranged in the fixed plate (21), two groups of first liquid inlets (22) and first liquid outlets (23) are respectively arranged on the upper side and the lower side of one end of the fixed plate (21), the first liquid inlets (22) are respectively connected and communicated with one ends of the first cooling coil (24) and the second cooling coil (25), the other ends of the first cooling coil (24) and the second cooling coil (25) are respectively connected with one liquid outlet (23), and the first liquid inlets (22) and the second liquid outlets (35) and the first liquid outlets (23) and the second liquid inlets (34) are respectively connected through communicating pipes (6).

8. The heat dissipation device of the wind driven generator pitch system according to claim 7 is characterized in that the communicating pipe (6) comprises an S pipe (61) and a U-shaped pipe (62), two liquid inlets I (22) and two liquid outlets II (35) are respectively communicated with the U-shaped pipe (62) through the S pipe (61), the same two liquid outlets I (23) and two liquid inlets II (34) are respectively communicated with the U-shaped pipe (62) through the S pipe (61), and a micro pump is arranged inside one of the S pipe (61) and the U-shaped pipe (62).

9. The heat dissipating device of a pitch system of a wind driven generator according to claim 8, wherein the heat dissipating grille (3) and the cooling module (2) are connected to each other through two sets of S-tubes (61) and U-tubes (62) in the connecting tube (6), thereby forming two sets of liquid cooling systems.