Split type air-cooled cooler for large megawatt wind power gear box

Abstract

The utility model discloses a split type air cooling cooler for a large megawatt wind power gear box. The oil filter plate comprises a first plate sheet, a second plate sheet and a one-way valve which is detachably connected with the first plate sheet and the second plate sheet, wherein the one-way valve is provided with an oil inlet and an oil outlet; a first oil inlet channel and a first oil return channel are arranged on the two sides in the first plate respectively, a first core body is arranged between the first oil inlet channel and the first oil return channel, one end of the first oil inlet channel communicates with the oil inlet, and a bypass channel used for communicating one end of the first oil return channel and the oil outlet is arranged in the first plate; a second oil inlet channel and a second oil return channel are arranged on the two sides in the second plate correspondingly, a second core is arranged between the second oil inlet channel and the second oil return channel, and one end of the second oil inlet channel communicates with the oil inlet. According to the utility model, the cooling effect can be ensured, and the split structure is adopted, so that the first plate sheet or the second plate sheet only needs to be correspondingly replaced when being damaged, and the whole plate sheet is not required to be replaced, namely the maintenance is convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of air-cooled coolers, and in particular relates to a split-type air-cooled cooler for a large megawatt wind turbine gearbox. Background Technology

[0002] Currently, in large-megawatt wind turbine units, the heat exchange capacity of gearbox coolers is gradually increasing. To address this, existing coolers are often made with larger cores and are mostly integrated units. However, the increased flow rate and lengthened liquid channels in the cooler lead to increased flow resistance. Especially in low-temperature environments, the heat exchange efficiency of the cooler can increase exponentially. The cooled oil becomes more viscous and clogs the cooler. When the flow resistance exceeds the set pressure of the bypass valve, the bypass valve will open, preventing the cooler from functioning properly.

[0003] In addition, due to the compact design of wind turbine nacelles and the limitations imposed by space layout and construction conditions, there are difficulties in the installation and maintenance of large integrated coolers. Furthermore, when a cooler is damaged, the entire cooler needs to be replaced, which increases costs. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a split-type air-cooled cooler for large-megawatt wind turbine gearboxes, which can ensure cooling effect and is easy to maintain.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A split-type air-cooled cooler for a large-megawatt wind turbine gearbox includes a first plate, a second plate, and a one-way valve that can be detachably connected to the first plate and the second plate. The one-way valve is provided with an oil inlet and an oil outlet.

[0007] The first plate has a first oil inlet channel and a first oil return channel on both sides along the length direction. A first core is provided between the first oil inlet channel and the first oil return channel. A first oil return port is provided at one end of the first oil return channel. The other end of the first oil inlet channel is connected to the oil inlet. A bypass channel is provided in the first plate to connect the other end of the first oil return channel and the oil outlet.

[0008] The second plate has a second oil inlet channel and a second oil return channel on both sides along the length direction. A second core is provided between the second oil inlet channel and the second oil return channel. One end of the second oil return channel is provided with a second oil return port, and the other end of the second oil inlet channel is connected to the oil inlet.

[0009] The beneficial effects of adopting the above technical solution are as follows: After the first plate and the second plate are assembled, the same high-power cooling as the integrated plate can be achieved. Moreover, the first plate and the second plate almost halve the length of the flow channel compared to the integrated plate, and can also divert the oil. This helps to reduce the flow resistance inside the cooler, thereby avoiding the problem of cooler failure caused by the flow resistance inside the cooler being greater than the set pressure of the bypass valve, as is the case with integrated coolers, thus ensuring the cooling effect.

[0010] Meanwhile, the first plate and the second plate are assembled to form the cooler plate, which is a split structure. This makes it easy to transport, install and maintain. If the first plate or the second plate is damaged, only the corresponding plate needs to be replaced instead of the whole plate. This makes it easy to maintain and helps to save on later maintenance costs.

[0011] Furthermore, the first plate can be detachably connected to the second plate.

[0012] The beneficial effects of adopting the above technical solution are as follows: after the first plate and the second plate are connected, the overall structural stability of the cooler can be improved; after the first plate and the second plate are disassembled, they can be conveniently transported, replaced and repaired.

[0013] Furthermore, the first core is provided with a plurality of first flow channels for connecting the first oil inlet channel and the first oil return channel, and the second core is provided with a plurality of second flow channels for connecting the second oil inlet channel and the second oil return channel.

[0014] Furthermore, the first core is provided with a plurality of first flow channels evenly arranged along its length, and the second core is provided with a plurality of second flow channels evenly arranged along its length.

[0015] Furthermore, the first flow channel and the second flow channel extend along the width direction of the first core and the second core, respectively.

[0016] Furthermore, the other end of the first oil inlet channel is provided with a first connecting port for connecting to the oil inlet, and the other end of the second oil inlet channel is provided with a second connecting port for connecting to the oil inlet.

[0017] Furthermore, one end of the check valve is provided with an oil inlet, a third connecting port for communicating with the first connecting port, and a fourth connecting port for communicating with the second connecting port. The oil inlet, the third connecting port, and the fourth connecting port are all connected to one end chamber of the check valve.

[0018] Furthermore, the bypass channel is provided with a bypass port at the end away from the first return oil channel for connecting with the oil outlet, and the oil outlet connects to the other end chamber of the check valve.

[0019] Furthermore, the one-way valve includes a valve body with two chambers, a valve core for isolating the two chambers, and a spring located between the valve core and the valve body.

[0020] Furthermore, a screw plug is threaded to one end of the valve body, the axial direction of the screw plug is matched with the length direction of the spring, and the spring is located between the screw plug and the valve core.

[0021] The beneficial effects of this utility model are as follows:

[0022] After the first and second plates are assembled, the same high-power cooling as the integrated plate can be achieved. Compared with the integrated plate, the first and second plates almost halve the length of the flow channel and can also split the oil flow. This helps to reduce the flow resistance inside the cooler, thereby avoiding the problem of cooler failure caused by the flow resistance inside the cooler being greater than the set pressure of the bypass valve, as is the case with integrated coolers, thus ensuring the cooling effect.

[0023] Meanwhile, the first plate and the second plate are assembled to form the cooler plate, which is a split structure. This makes it easy to transport, install and maintain. If the first plate or the second plate is damaged, only the corresponding plate needs to be replaced instead of the whole plate. This makes it easy to maintain and helps to save on later maintenance costs. Attached Figure Description

[0024] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0025] in:

[0026] Figure 1 A schematic diagram of the structure of this utility model is shown;

[0027] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0028] Figure label:

[0029] 1. First oil return channel; 2. First oil return port; 3. First core; 4. First oil inlet channel; 5. Second oil inlet channel; 6. Second core; 7. Second oil return port; 8. Second oil return channel; 9. Bypass channel; 10. Plug; 11. Spring; 12. Valve core; 13. Oil inlet; 14. Valve body; 15. Oil outlet. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] This utility model provides a split-type air-cooled cooler for a large-megawatt wind turbine gearbox, such as... Figure 1 As shown, it includes a first plate, a second plate, and a one-way valve that connects the first plate and the second plate with screws. The one-way valve is provided with an oil inlet 13 and an oil outlet 15.

[0032] The first plate has a first oil inlet channel 4 and a first oil return channel 1 respectively arranged on both sides along the length direction. A first core 3 is arranged between the first oil inlet channel 4 and the first oil return channel 1. A first oil return port 2 is arranged at one end of the first oil return channel 1. The other end of the first oil inlet channel 4 is connected to the oil inlet port 13. A bypass channel 9 is arranged in the first plate to connect the other end of the first oil return channel 1 and the oil outlet 15.

[0033] The second plate has a second oil inlet channel 5 and a second oil return channel 8 respectively arranged on both sides along the length direction. A second core 6 is arranged between the second oil inlet channel 5 and the second oil return channel 8. A second oil return port 7 is arranged at one end of the second oil return channel 8, and the other end of the second oil inlet channel 5 is connected to the oil inlet port 13.

[0034] The first oil inlet channel 4 and the second oil inlet channel 5 are parallel and close to each other.

[0035] It is understandable that after the first plate and the second plate are assembled, the same high-power cooling as the integrated plate can be achieved. Moreover, compared with the integrated plate, the first plate and the second plate almost halve the length of the flow channel and can also divert the oil. This helps to reduce the flow resistance inside the cooler, thereby avoiding the problem of cooler failure caused by the flow resistance inside the cooler being greater than the set pressure of the bypass valve, as is the case with integrated coolers, thus ensuring the cooling effect.

[0036] Meanwhile, the first plate and the second plate are assembled to form the cooler plate, which is a split structure. This makes it easy to transport, install and maintain. If the first plate or the second plate is damaged, only the corresponding plate needs to be replaced instead of the whole plate. This makes it easy to maintain and helps to save on later maintenance costs.

[0037] Specifically, during transportation, the cooler can be packaged and transported as two separate plates by disconnecting the one-way valve from the first and second plates; during installation, the one-way valve is connected to the first and second plates to achieve overall assembly of the cooler; and in the event of a malfunction later, only the faulty plate needs to be replaced.

[0038] When the ambient temperature is high, the temperature at the oil inlet 13 is high, the oil viscosity is low, and the flow resistance of the first plate and the second plate is small. A portion of the oil flows sequentially through the check valve, the first oil inlet channel 4, the first core 3 and the first oil return channel 1, and flows out from the first oil return port 2. At the same time, another portion of the oil flows sequentially through the check valve, the second oil inlet channel 5, the second core 6 and the second oil return channel 8, and flows out from the second oil return port 7. This allows the cooler to achieve the same high-power cooling as existing large-size integrated coolers.

[0039] When the ambient temperature is low, the temperature at the oil inlet 13 is low, the oil viscosity is high, and the flow resistance of the first plate and the second plate is high. When the pressure in the chamber connected by the oil inlet 13 is greater than the set pressure of the check valve, the check valve opens. Part of the oil flows through the oil outlet 15, the bypass channel 9 and the first return oil channel 1 in sequence, and flows out from the first return oil port 2. The other part of the oil flows through the check valve, the second oil inlet channel 5, the second core 6 and the second return oil channel 8 in sequence, and flows out from the second return oil port 7, so as to reduce the flow volume of the flow channel and thus reduce the system pressure.

[0040] This cooler is a split-type cooler where the oil enters from the middle and exits from both sides. After the oil flows in from the oil inlet 13, it splits into two. Compared with a single-inlet-single-outlet plate, this reduces the length of the oil flow path and the flow velocity, thereby reducing flow resistance and improving the throughput of high-viscosity oil at low temperatures.

[0041] In one embodiment, the first plate is bolted to the second plate.

[0042] It is understandable that connecting the first plate and the second plate can improve the overall structural stability of the cooler; and disassembling the first plate and the second plate can facilitate transportation, replacement and maintenance.

[0043] In one embodiment, the first core 3 is provided with a plurality of first flow channels for connecting the first oil inlet channel 4 and the first oil return channel 1, and the second core 6 is provided with a plurality of second flow channels for connecting the second oil inlet channel 5 and the second oil return channel 8; wherein, the first flow channels and the second flow channels are both microchannels.

[0044] It is understandable that the lubricating oil flows through the first or second flow channel to exchange heat with the air, thereby achieving cooling.

[0045] In one embodiment, the first core 3 is provided with a plurality of first flow channels uniformly along its length, and the second core 6 is provided with a plurality of second flow channels uniformly along its length.

[0046] In one embodiment, the first flow channel and the second flow channel extend along the width direction of the first core 3 and the second core 6, respectively.

[0047] In one embodiment, the other end of the first oil inlet channel 4 is provided with a first connecting port for connecting to the oil inlet 13, and the other end of the second oil inlet channel 5 is provided with a second connecting port for connecting to the oil inlet 13.

[0048] In one embodiment, one end of the check valve is provided with an oil inlet 13, a third communication port for communicating with a first communication port, and a fourth communication port for communicating with a second communication port. The oil inlet 13, the third communication port, and the fourth communication port are all connected to one end chamber of the check valve.

[0049] In one embodiment, the bypass channel 9 is provided with a bypass port at one end away from the first return oil channel 1 for communicating with the oil outlet 15, and the oil outlet 15 is connected to the other end chamber of the check valve.

[0050] In one embodiment, the one-way valve includes a valve body 14 having two chambers, a valve core 12 for isolating the two chambers, and a spring 11 located between the valve core 12 and the valve body 14.

[0051] In one embodiment, a screw plug 10 is threaded to one end of the valve body 14, the axial direction of the screw plug 10 matches the length direction of the spring 11, and the spring 11 is located between the screw plug 10 and the valve core 12.

[0052] It should be noted that the spring 11 is located in the chamber that connects to the oil outlet 15, and the valve core 12 is provided with a mounting hole for radially limiting the spring 11 at the end near the screw plug 10. One end of the spring 11 is radially limited in the mounting hole and is subjected to the axial force of the valve core 12, while the other end of the spring 11 is subjected to the axial pressure of the screw plug 10. By rotating the screw plug 10, the distance between the screw plug 10 and the valve core 12 can be changed, thereby changing the compression of the spring 11 and thus changing the set pressure of the check valve. In addition, the check valve is a common valve, so other structures of the check valve will not be described in detail here.

[0053] In summary, this utility model proposes a split-type cooler with one inlet and two outlets, which is suitable for high-power cooling and also for low-temperature environments with high oil viscosity. The structure is designed to be easy to disassemble and assemble, facilitating transportation, installation and maintenance. Furthermore, when the plates are damaged, only the damaged plates need to be replaced instead of replacing the entire unit, further saving on later maintenance costs.

[0054] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A split-type air-cooled cooler for a large-megawatt wind turbine gearbox, characterized in that, It includes a first plate, a second plate, and a one-way valve that can be detachably connected to the first plate and the second plate. The one-way valve is provided with an oil inlet (13) and an oil outlet (15). The first plate has a first oil inlet channel (4) and a first oil return channel (1) respectively arranged on both sides along the length direction. A first core (3) is arranged between the first oil inlet channel (4) and the first oil return channel (1). A first oil return port (2) is arranged at one end of the first oil return channel (1). The other end of the first oil inlet channel (4) is connected to the oil inlet port (13). A bypass channel (9) is arranged in the first plate to connect the other end of the first oil return channel (1) and the oil outlet (15). The second plate has a second oil inlet channel (5) and a second oil return channel (8) respectively arranged on both sides along the length direction. A second core (6) is arranged between the second oil inlet channel (5) and the second oil return channel (8). A second oil return port (7) is provided at one end of the second oil return channel (8), and the other end of the second oil inlet channel (5) is connected to the oil inlet port (13).

2. The split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 1, characterized in that, The first plate is detachably connected to the second plate.

3. The split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 1, characterized in that, The first core (3) is provided with a plurality of first flow channels for connecting the first oil inlet channel (4) and the first oil return channel (1), and the second core (6) is provided with a plurality of second flow channels for connecting the second oil inlet channel (5) and the second oil return channel (8).

4. A split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 3, characterized in that, The first core (3) has a plurality of first flow channels uniformly arranged along its length, and the second core (6) has a plurality of second flow channels uniformly arranged along its length.

5. A split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 3 or 4, characterized in that, The first flow channel and the second flow channel extend along the width direction of the first core (3) and the second core (6), respectively.

6. A split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 1, characterized in that, The other end of the first oil inlet channel (4) is provided with a first connecting port for connecting to the oil inlet (13), and the other end of the second oil inlet channel (5) is provided with a second connecting port for connecting to the oil inlet (13).

7. A split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 6, characterized in that, One end of the one-way valve is provided with an oil inlet (13), a third connecting port for communicating with the first connecting port, and a fourth connecting port for communicating with the second connecting port. The oil inlet (13), the third connecting port, and the fourth connecting port are all connected to one end chamber of the one-way valve.

8. A split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 1 or 7, characterized in that, The bypass channel (9) is provided with a bypass port at one end away from the first return oil channel (1) for communicating with the oil outlet (15), and the oil outlet (15) is connected to the other end chamber of the one-way valve.

9. A split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 1, characterized in that, The one-way valve includes a valve body (14) with two chambers, a valve core (12) for blocking the two chambers, and a spring (11) located between the valve core (12) and the valve body (14).

10. A split-type air-cooled cooler for a large-megawatt wind turbine gearbox according to claim 9, characterized in that, One end of the valve body (14) is threaded with a plug (10), the axial direction of the plug (10) matches the length direction of the spring (11), and the spring (11) is located between the plug (10) and the valve core (12).

Images