Air-cooled cooler with embedded bypass valve

Abstract

The air-cooled cooler comprises the bypass valve, a first plate sheet and a second plate sheet, the first plate sheet and the second plate sheet are connected with each other, the first plate sheet is provided with a first oil inlet channel, a first oil return channel, a first core body communicated with the first oil inlet channel and the first oil return channel, and a first oil return opening communicated with the first oil return channel; the second plate sheet is provided with an oil inlet, a second oil inlet channel communicated with the oil inlet and the first oil inlet channel, a second oil return channel, a second core body communicated with the second oil inlet channel and the second oil return channel, and a second oil return port communicated with the second oil return channel; the inlet end of the bypass valve communicates with the second oil inlet channel, and the outlet end of the bypass valve communicates with the second oil return channel. The flow resistance in the cooler can be reduced, so that the problem that the cooler loses efficacy due to the fact that the flow resistance of the cooler is too large is solved, and the cooling effect is ensured. The bypass valve is embedded in the second oil inlet channel, so that a bypass channel does not need to be designed independently, and the area of a plate sheet can be reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of air-cooled coolers, and particularly relates to an air-cooled cooler with a bypass valve embedded in it. 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 will have larger core sizes. However, the increased flow rate and lengthened liquid channels in the cooler will lead to increased flow resistance. Especially in low-temperature environments, the heat exchange capacity of the cooler will increase exponentially. The cooled oil will become viscous and clog the cooler. When the flow resistance of the cooler exceeds the set pressure of the bypass valve, the bypass valve will open, thus preventing the cooler from performing its cooling function.

[0003] In addition, traditional cooler plates all require separate bypass channels, which increases both the plate size and cost. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an air-cooled cooler with an embedded bypass valve, which can ensure the cooling effect and help reduce the plate size.

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

[0006] A bypass valve-embedded air-cooled cooler includes a first plate and a second plate connected to each other. The first plate and the second plate are respectively provided with a first oil return port and a second oil return port at one end of their respective sides, and an oil inlet is provided at the other end of the second plate near the first plate.

[0007] The first oil inlet channel and the second oil inlet channel are respectively provided along the length direction on the side of the first plate and the second plate that are close to each other. The other end of the second oil inlet channel is connected to a bypass valve. The ends of the first oil inlet channel and the second oil inlet channel that are close to the oil inlet are connected to each other.

[0008] A first oil return channel and a second oil return channel are respectively provided in the first plate and the second plate. A first core is provided between a portion of the first oil return channel and the first oil inlet channel, and a second core is provided between a portion of the second oil return channel and the second oil inlet channel.

[0009] One end of the first return oil channel is connected to the first return oil port, the inlet end of the bypass valve is connected to the second inlet oil channel, and one end of the second return oil channel is connected to the outlet end of the bypass valve and the second return oil port.

[0010] The beneficial effects of adopting the above technical solution are as follows: after the oil enters from the oil inlet, it is diverted into the first plate and the second plate on both sides, so that the length of the flow channel is almost halved, and it is also beneficial to reduce the flow resistance inside the cooler, thereby avoiding the problem of cooler failure due to the flow resistance of the cooler being greater than the set pressure of the bypass valve, thus ensuring the cooling effect; at the same time, the bypass valve is embedded in the second oil inlet channel, that is, there is no need to design a separate bypass channel, which is beneficial to reduce the plate area and cost.

[0011] Furthermore, the bypass valve includes a valve core and a valve sleeve coaxially connected in the second oil inlet channel. The two ends of the valve sleeve are the inlet end and the outlet end, respectively. The valve core includes a rod portion slidably connected in the valve sleeve along the axial direction and a head for blocking the inlet end. A first cylindrical spring and a second cylindrical spring are provided between the valve sleeve and the head and sleeved on the rod portion.

[0012] The beneficial effects of adopting the above technical solution are as follows: compared with the traditional bypass valve which uses a single cylindrical spring, this bypass valve is equipped with two cylindrical springs, a first cylindrical spring and a second cylindrical spring, to reduce the axial length of the bypass valve, thereby reducing the impact of the bypass valve size on heat dissipation.

[0013] Furthermore, the valve sleeve is threaded into the second oil inlet channel.

[0014] The beneficial effects of adopting the above technical solution are: this setting facilitates the installation or disassembly of the valve sleeve, thereby facilitating the inspection or maintenance of the valve sleeve.

[0015] Furthermore, the second cylindrical spring is located outside the first cylindrical spring, and the cross-sectional diameter of the second cylindrical spring is larger than that of the first cylindrical spring.

[0016] Furthermore, the first plate can be detachably connected to the second plate.

[0017] The beneficial effects of adopting the above technical solution are as follows: This configuration forms a split-type cooler plate structure, which facilitates transportation, installation and maintenance. When 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.

[0018] 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.

[0019] 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.

[0020] Furthermore, the first flow channel and the second flow channel extend along the width direction of the first core and the second core, respectively.

[0021] Furthermore, the first oil inlet channel and the second oil inlet channel are respectively provided with a first connecting port and a second connecting port for mutual communication at the end near the oil inlet.

[0022] The beneficial effects of adopting the above technical solution are as follows: This configuration allows the oil entering the second oil inlet channel from the oil inlet to sequentially pass through the second connecting port and the first connecting port before entering the first oil inlet channel.

[0023] Furthermore, the first oil return channel includes a first oil return section and a second oil return section that are interconnected. The first oil return section is arranged along the length direction on the side of the first plate away from the second plate. A first core is arranged between the first oil return section and the first oil inlet channel. The second oil return section is arranged along the width direction in the first plate. The end of the second oil return section away from the first oil return section is connected to the first oil return port.

[0024] The second oil return channel includes a third oil return section and a fourth oil return section that are interconnected. The third oil return section is arranged along the length direction on the side of the second plate away from the first plate. A second core is arranged between the third oil return section and the second oil inlet channel. The fourth oil return section is arranged along the width direction in the second plate. The end of the fourth oil return section away from the third oil return section is connected to the second oil return port.

[0025] The beneficial effects of this utility model are as follows:

[0026] After the oil enters through the inlet, it is diverted into the first and second plates on both sides, which nearly halves the length of the flow channel and helps to reduce the flow resistance inside the cooler. This prevents the cooler from failing due to the flow resistance exceeding the set pressure of the bypass valve, thus ensuring the cooling effect. At the same time, the bypass valve is embedded in the second oil inlet channel, which means that there is no need to design a separate bypass channel. This helps to reduce the plate area and cost. Attached Figure Description

[0027] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0028] in:

[0029] Figure 1 A schematic diagram of the structure of this utility model is shown;

[0030] Figure 2 Showing Figure 1 A magnified view of a section at point A in the middle;

[0031] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0032] Figure label:

[0033] 1. First oil return channel; 2. First core; 3. First oil inlet channel; 4. Oil inlet; 5. Second oil inlet channel; 6. Second core; 7. Second oil return channel; 8. Bypass valve; 801. Valve sleeve; 802. Valve core; 803. First cylindrical spring; 804. Second cylindrical spring; 9. Second oil return port; 10. First oil return port. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] This utility model provides an air-cooled cooler with a bypass valve embedded, such as... Figure 1 and Figure 2 As shown, it includes a first plate and a second plate that are connected to each other. The first plate and the second plate are respectively provided with a first oil return port 10 and a second oil return port 9 at one end of the first plate that is close to each other. The second plate is provided with an oil inlet 4 at the other end of the second plate that is close to the first plate.

[0036] The first oil inlet channel 3 and the second oil inlet channel 5, which are close to each other on the sides of the first plate and the second plate respectively, are provided along the length direction. The other end of the second oil inlet channel 5 is connected to the bypass valve 8. The ends of the first oil inlet channel 3 and the second oil inlet channel 5 that are close to the oil inlet 4 are connected to each other.

[0037] A first oil return channel 1 and a second oil return channel 7 are respectively provided in the first plate and the second plate. A first core 2 is provided between a portion of the first oil return channel 1 and the first oil inlet channel 3, and a second core 6 is provided between a portion of the second oil return channel 7 and the second oil inlet channel 5.

[0038] One end of the first return oil channel 1 is connected to the first return oil port 10, the inlet end of the bypass valve 8 is connected to the second inlet oil channel 5, and one end of the second return oil channel 7 is connected to the outlet end of the bypass valve 8 and the second return oil port 9.

[0039] Understandably, after the oil enters from the inlet 4, it is diverted into the first and second plates on both sides, so that the length of the flow channel is almost halved, which helps to reduce the flow resistance inside the cooler. This avoids the problem of cooler failure due to the flow resistance of the cooler exceeding the set pressure of the bypass valve 8, thus ensuring the cooling effect. At the same time, the bypass valve 8 is embedded in the second oil inlet channel 5, which means that there is no need to design a separate bypass channel. This helps to reduce the plate area and cost.

[0040] Specifically, when the ambient temperature is high, the temperature at oil inlet 4 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 second oil inlet channel 5, the second core 6, and the second oil return channel 7, and flows out from the second oil return port 9. At the same time, another portion of the oil flows sequentially through one end of the second oil inlet channel 5, the first oil inlet channel 3, the first core 2, and the first oil return channel 1, and flows out from the first oil return port 10. This allows the cooler to achieve the same high-power cooling as existing large-size coolers.

[0041] When the ambient temperature is low, the temperature at oil inlet 4 is low, the oil viscosity is high, and the flow resistance of the first and second plates is high. When the pressure at the second oil inlet channel 5 is greater than the set pressure of the bypass valve 8, the bypass valve 8 opens. Part of the oil flows sequentially through the second oil inlet channel 5, the bypass valve 8, and the second return oil channel 7, and flows out from the second return oil port 9. Part of the oil flows sequentially through one end of the second oil inlet channel 5, the first oil inlet channel 3, the first core 2, and the first return oil channel 1, and flows out from the first return oil port 10. The remaining oil flows sequentially through the second oil inlet channel 5, the second core 6, and the second return oil channel 7, and flows out from the second return oil port 9, thereby reducing the flow rate of the flow channels and thus reducing the system pressure.

[0042] This cooler is a one-inlet, two-outlet cooler. The oil flows in from the inlet 4 and is then split into two. Compared with a one-inlet, one-outlet plate cooler, this reduces the oil flow path length and flow velocity, thereby reducing flow resistance and improving the throughput of high-viscosity oil at low temperatures.

[0043] In one embodiment, such as Figure 2 As shown, the bypass valve 8 includes a valve core 802 and a valve sleeve 801 coaxially connected in the second oil inlet channel 5. The two ends of the valve sleeve 801 are the inlet end and the outlet end, respectively. The valve core 802 includes a rod portion that is axially slidably connected in the valve sleeve 801 and a head for blocking the inlet end. Since the traditional bypass valve uses a single cylindrical spring for pressure regulation, this results in a large axial span of the bypass valve. Therefore, a first cylindrical spring 803 and a second cylindrical spring 804 are provided between the valve sleeve 801 and the head and sleeved on the rod portion.

[0044] Understandably, compared to the traditional bypass valve which uses a single cylindrical spring, this bypass valve 8 is equipped with two cylindrical springs, a first cylindrical spring 803 and a second cylindrical spring 804, in order to reduce the axial length of the bypass valve 8 and thus reduce the impact of the size of the bypass valve 8 on heat dissipation.

[0045] In one embodiment, the valve sleeve 801 is threadedly connected to the second oil inlet channel 5 to facilitate the installation or removal of the valve sleeve 801, thereby facilitating the inspection or maintenance of the valve sleeve 801.

[0046] It should be noted that the second oil return port 9 is preferably coaxial with the second oil inlet channel 5, and the diameter of the second oil return port 9 is not less than the major diameter of the external thread on the valve sleeve 801.

[0047] In one embodiment, the second cylindrical spring 804 is located outside the first cylindrical spring 803, and the cross-sectional diameter of the second cylindrical spring 804 is larger than the cross-sectional diameter of the first cylindrical spring 803.

[0048] Due to the compact design of wind turbine nacelles and limitations imposed by space layout and construction conditions, large integrated coolers present maintenance difficulties during installation and repair. Furthermore, when a cooler is damaged, the entire cooler needs to be replaced, increasing costs. Therefore, connecting the first and second plates with bolts or screws to form a split cooler plate structure facilitates transportation, installation, and maintenance. If either the first or second plate is damaged, only the corresponding plate needs to be replaced instead of the entire unit, making maintenance easier and saving on future maintenance costs.

[0049] Specifically, the first and second plates can be transported separately during transportation; if a fault occurs later, only the faulty plate needs to be replaced.

[0050] In one embodiment, the first core 2 is provided with a plurality of first flow channels for connecting the first oil inlet channel 3 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 7; wherein, the first flow channels and the second flow channels are both microchannels.

[0051] It is understandable that the lubricating oil flows through the first or second flow channel to exchange heat with the air, thereby achieving cooling.

[0052] In one embodiment, the first core 2 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.

[0053] In one embodiment, the first flow channel and the second flow channel extend along the width direction of the first core 2 and the second core 6, respectively.

[0054] In one embodiment, the first oil inlet channel 3 and the second oil inlet channel 5 are respectively provided with a first connecting port and a second connecting port for mutual communication at one end near the oil inlet port 4, so that the oil entering the second oil inlet channel 5 from the oil inlet port 4 can enter the first oil inlet channel 3 after passing through the second connecting port and the first connecting port in sequence.

[0055] It should be noted that the axes of the first and second connecting ports coincide; a sealing ring is provided between the first and second plates on the outside of the first and second connecting ports to prevent oil flowing through the first and second connecting ports from leaking from the gap between the first and second plates.

[0056] In one embodiment, the first oil return channel 1 includes a first oil return section and a second oil return section that are interconnected. The first oil return section is arranged along the length direction on the side of the first plate away from the second plate. A first core 2 is arranged between the first oil return section and the first oil inlet channel 3. The second oil return section is arranged along the width direction in the first plate. The end of the second oil return section away from the first oil return section is connected to the first oil return port 10.

[0057] The second oil return channel 7 includes a third oil return section and a fourth oil return section that are interconnected. The third oil return section is arranged along the length direction on the side of the second plate away from the first plate. A second core 6 is arranged between the third oil return section and the second oil inlet channel 5. The fourth oil return section is arranged along the width direction in the second plate. The end of the fourth oil return section away from the third oil return section is connected to the second oil return port 9.

[0058] 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. Its split-type structure is easy to assemble and disassemble, facilitating transportation, installation, and maintenance. Furthermore, when a plate is damaged, only the damaged plate needs to be replaced, rather than the entire unit, further reducing future maintenance costs. The bypass valve 8 is directly embedded in the second oil inlet channel 5, eliminating the need for a separate bypass channel, which helps reduce plate area and cost. The bypass valve 8 uses two cylindrical springs, a first cylindrical spring 803 and a second cylindrical spring 804, instead of a traditional single cylindrical spring, thereby reducing the axial length of the bypass valve 8 and thus minimizing the impact of the bypass valve 8's size on heat dissipation.

[0059] 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.

[0060] 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 bypass valve embedded in an air-cooled cooler, characterized in that, It includes a first plate and a second plate that are connected to each other. The first plate and the second plate are respectively provided with a first oil return port (10) and a second oil return port (9) at one end of the first plate and the other end of the second plate that is close to the first plate. The second plate is provided with an oil inlet (4) at the other end of the second plate. The first plate and the second plate are respectively provided with a first oil inlet channel (3) and a second oil inlet channel (5) connected to the oil inlet (4) on the side close to each other along the length direction. The other end of the second oil inlet channel (5) is connected to a bypass valve (8). The ends of the first oil inlet channel (3) and the second oil inlet channel (5) close to the oil inlet (4) are connected to each other. A first oil return channel (1) and a second oil return channel (7) are respectively provided in the first plate and the second plate. A first core (2) is provided between a portion of the first oil return channel (1) and the first oil inlet channel (3), and a second core (6) is provided between a portion of the second oil return channel (7) and the second oil inlet channel (5). One end of the first return oil channel (1) is connected to the first return oil port (10), the inlet end of the bypass valve (8) is connected to the second inlet oil channel (5), and one end of the second return oil channel (7) is connected to the outlet end of the bypass valve (8) and the second return oil port (9).

2. The air-cooled cooler with an embedded bypass valve according to claim 1, characterized in that, The bypass valve (8) includes a valve core (802) and a valve sleeve (801) coaxially connected in the second oil inlet channel (5). The two ends of the valve sleeve (801) are the inlet end and the outlet end, respectively. The valve core (802) includes a rod portion slidably connected in the valve sleeve (801) along the axis and a head for blocking the inlet end. A first cylindrical spring (803) and a second cylindrical spring (804) sleeved on the rod portion are provided between the valve sleeve (801) and the head.

3. A bypass valve-embedded air-cooled cooler according to claim 2, characterized in that, The valve sleeve (801) is threadedly connected to the second oil inlet channel (5).

4. A bypass valve-embedded air-cooled cooler according to claim 2, characterized in that, The second cylindrical spring (804) is located outside the first cylindrical spring (803), and the cross-sectional diameter of the second cylindrical spring (804) is larger than the cross-sectional diameter of the first cylindrical spring (803).

5. A bypass valve-embedded air-cooled cooler according to claim 1, characterized in that, The first plate is detachably connected to the second plate.

6. A bypass valve-embedded air-cooled cooler according to claim 1, characterized in that, The first core (2) is provided with a plurality of first flow channels for connecting the first oil inlet channel (3) 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 (7).

7. A bypass valve-embedded air-cooled cooler according to claim 6, characterized in that, The first core (2) 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.

8. A bypass valve-embedded air-cooled cooler according to claim 6 or 7, characterized in that, The first flow channel and the second flow channel extend along the width direction of the first core (2) and the second core (6), respectively.

9. A bypass valve-embedded air-cooled cooler according to claim 1, characterized in that, The first oil inlet channel (3) and the second oil inlet channel (5) are respectively provided with a first connecting port and a second connecting port for mutual communication at one end near the oil inlet port (4).

10. A bypass valve-embedded air-cooled cooler according to claim 1, characterized in that, The first oil return channel (1) includes a first oil return section and a second oil return section that are interconnected. The first oil return section is arranged along the length direction on the side of the first plate away from the second plate. The first core (2) is arranged between the first oil return section and the first oil inlet channel (3). The second oil return section is arranged along the width direction in the first plate. The end of the second oil return section away from the first oil return section is connected to the first oil return port (10). The second oil return channel (7) includes a third oil return section and a fourth oil return section that are interconnected. The third oil return section is arranged along the length direction on the side of the second plate away from the first plate. The second core (6) is arranged between the third oil return section and the second oil inlet channel (5). The fourth oil return section is arranged along the width direction in the second plate. The end of the fourth oil return section away from the third oil return section is connected to the second oil return port (9).

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