Engine cooling system

Abstract

The utility model provides a kind of engine cooling system, including engine, air inlet cover, air duct and heat exchanger, air duct is arranged between air inlet cover and heat exchanger, air duct is respectively communicated with the cold air inlet end of air inlet cover and heat exchanger, one end of engine is provided with fan, fan is set in air duct, the heat dissipation port of engine is communicated with the heat exchange air inlet of heat exchanger, at least one air guide channel and at least two first sound attenuation components are provided in air duct, first sound attenuation component is provided on the both sides of air guide channel, first sound attenuation component includes first air deflector and first sound attenuation cotton, first cavity is provided in first air deflector, a plurality of first perforations are set on the surface of first air deflector, first perforation is communicated with first cavity, and first sound attenuation cotton is set in first cavity;The utility model has the advantages of simple structure, high cooling efficiency and low noise.

Description

Technical Field

[0001] This utility model relates to the field of engine cooling technology, specifically to an engine cooling system. Background Technology

[0002] In wind power plants, the operation of large engines typically generates significant heat, necessitating a cooling system for temperature control. However, while existing cooling systems meet basic cooling requirements, they produce excessive noise during operation, significantly disrupting the working environment. Utility Model Content

[0003] The purpose of this invention is to provide an engine cooling system with a simple structure and low noise.

[0004] To achieve the above objectives, this utility model provides an engine cooling system, including an engine, an air intake shroud, an air duct, and a heat exchanger. The air duct is disposed between the air intake shroud and the heat exchanger, and is connected to the cold air inlet of both the air intake shroud and the heat exchanger. A fan is provided at one end of the engine and is disposed inside the air duct. The engine's heat dissipation vent is connected to the heat exchange inlet of the heat exchanger. At least one air guide channel and at least two first noise reduction components are provided inside the air duct. First noise reduction components are provided on both sides of the air guide channel. Each first noise reduction component includes a first air guide plate and first noise reduction cotton. A first cavity is provided inside the first air guide plate, and multiple first perforations are opened on the surface of the first air guide plate. The first perforations are connected to the first cavity, and the first noise reduction cotton is disposed inside the first cavity.

[0005] As can be seen from the above scheme, by setting the first air guide plate, the airflow can be guided to flow along a fixed path, avoiding disorderly diffusion of the airflow in the air guide tube, reducing the generation of eddies, reducing ineffective circulation of the airflow in the air guide channel, and ensuring that the airflow enters the heat exchanger quickly and accurately. By setting the first sound-absorbing cotton inside the first air guide plate, the airflow can be guided while also buffering the direct impact of the airflow on the air guide plate, reducing the generation of turbulent noise. In addition, the air guide plate is made of metal material, and the metal wall surface has a high reflectivity of noise. If there is no sound-absorbing cotton inside the first air guide plate, the noise generated by the airflow will be repeatedly reflected between the walls of the air guide channel, forming secondary noise. The setting of the first sound-absorbing cotton can effectively prevent the noise from being superimposed and amplified.

[0006] A further design is that the first air guide plate includes two end walls and four side walls, the four side walls are connected end to end, the two end walls are connected to the four side walls respectively, and the two end walls and the four side walls form a first cavity.

[0007] As can be seen from the above scheme, by setting two end walls and four side walls to form the first cavity, it serves to fix and protect the first sound-absorbing cotton, preventing it from breaking apart under the impact of airflow and entering the heat exchanger. On the other hand, the staff can fill the first sound-absorbing cotton into the first cavity first, and then install the first air guide plate into the air guide duct, which has the advantages of convenient and quick assembly operation.

[0008] A further option is to place the first air guide plate close to the inner wall of the air guide tube, and the first air guide plate and the inner wall of the air guide tube form a first cavity.

[0009] As can be seen from the above scheme, when the first air guide plate is set close to the inner wall of the air guide tube, the first sound-absorbing cotton can be fixed by the first air guide plate and the inner wall of the air guide tube, which can fix and protect the first sound-absorbing cotton and prevent the first sound-absorbing cotton from disintegrating and entering the heat exchanger under the impact of airflow.

[0010] A further proposed solution is to set the number of first silencing components to three, with the three first silencing components arranged at intervals, and an air guide channel formed between two connected first silencing components.

[0011] As can be seen from the above scheme, the air guide channel is set to two, which can evenly distribute the total airflow to different areas of the heat exchanger and avoid the airflow from concentrating in the middle of the heat exchanger, resulting in insufficient airflow in its edge areas.

[0012] A further embodiment is that the air duct includes a first cylindrical section and a second cylindrical section connected together. The first cylindrical section is provided with an annular flange, the free end of which extends into the interior of the first cylindrical section, and ventilation holes are provided inside the annular flange. A fan is disposed inside the first cylindrical section and is disposed corresponding to the ventilation holes.

[0013] As can be seen from the above scheme, by setting the fan and ventilation hole to correspond, the airflow entering from the air inlet can pass through the ventilation hole and enter the fan, and the centrifugal force of the fan can be used to change the direction and speed of the airflow.

[0014] A further solution is to install a second silencing component around the inside of the air inlet hood, extending from the air inlet of the air inlet hood to the air outlet of the air inlet hood.

[0015] As can be seen from the above scheme, by setting a second silencing component on all four sides inside the air intake hood, it is beneficial to reduce the noise when the air intake hood is drawing in air.

[0016] A further solution is that the second noise reduction component includes a second air guide plate and a second noise reduction cotton. The second air guide plate has a second cavity inside, and multiple second perforations are opened on the surface of the second air guide plate. The second perforations are connected to the second cavity, and the second noise reduction cotton is placed inside the second cavity.

[0017] A further embodiment is that the heat exchanger includes a shell, baffles, at least two baffles, and multiple heat exchange tubes; the shell is provided with a heat exchange cavity, a heat exchange inlet, and a heat exchange outlet, the heat exchange cavity being connected to the heat exchange inlet and the heat exchange outlet respectively; the baffle is located on the outer side of one end of the shell, and a channel connecting the baffle to the outside is formed between the baffle and the end wall of the shell; all heat exchange tubes are arranged in the heat exchange cavity, one end of the heat exchange tube is connected to the air guide tube, and the other end of the heat exchange tube is connected to the channel; all baffles are arranged along the extension direction of the heat exchange tubes, the middle part of the heat exchange tube is fixed on the baffle, and a passage is formed between the side of the baffle away from the heat exchange inlet and the cavity wall of the heat exchange cavity, the heat exchange inlet being connected to the heat exchange outlet through the passage.

[0018] As can be seen from the above scheme, by setting up a baffle, the heat exchange tube is protected, preventing rainwater or debris from entering the heat exchange tube. By setting up a baffle, on the one hand, the position of the heat exchange tube in the heat exchange chamber can be fixed, which facilitates the flow of hot air from the engine on the outside of the heat exchange tube, making it easier to exchange heat with the heat exchange tube and improve the heat exchange effect. On the other hand, it can limit the connection between the heat exchange air inlet and the heat exchange air outlet through the passage, ensuring the heat exchange efficiency of the hot air and preventing the hot air from entering from the heat exchange air inlet and immediately exiting from the heat exchange air outlet.

[0019] A further design is that the partition includes a baffle and two connecting plates, with the baffle connected between one end of each of the two connecting plates, forming a channel between the baffle and the two connecting plates.

[0020] A further solution is to install a flow equalization plate at the cold air inlet end of the heat exchanger, and install a third sound-absorbing cotton and multiple hollow convex tubes on the flow equalization plate. The hollow convex tubes are connected to the air guide tube and the corresponding heat exchange tube, and the third sound-absorbing cotton is installed between two adjacent hollow convex tubes.

[0021] As can be seen from the above scheme, the flow equalization plate can evenly distribute the airflow to each heat exchange tube, avoiding local overcooling or overheating of the heat exchange tubes; by setting the third sound-absorbing cotton, it can not only buffer the impact of the airflow on the flow equalization plate and reduce impact noise, but also absorb the turbulence noise that is easily generated by the change in flow velocity when the airflow enters the heat exchanger from the air guide duct, which is conducive to further reducing the noise of the overall equipment. Attached Figure Description

[0022] Figure 1 This is a structural diagram of an embodiment of the present utility model.

[0023] Figure 2 This is a cross-sectional view of an embodiment of the present utility model.

[0024] Figure 3 This is a structural diagram of the air guide tube in an embodiment of this utility model.

[0025] Figure 4 This is a structural diagram of the first air guide plate in an embodiment of this utility model.

[0026] Figure 5 This is a structural diagram of the second air guide plate in an embodiment of this utility model.

[0027] Figure 6 This is a structural diagram of the heat exchanger in this embodiment of the utility model, omitting the heat exchange tubes.

[0028] Figure 7 This is a structural diagram of the flow equalization plate in an embodiment of this utility model.

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0030] See Figures 1 to 3 The engine cooling system provided in this embodiment includes an engine 1, an air intake shroud 2, an air duct 3, and a heat exchanger 4.

[0031] The heat exchanger 4 is positioned above the engine 1, with its heat exchange inlet 412 connected to the heat exchanger 1, allowing heat from the engine 1 to enter the heat exchanger 4. Both the air duct 3 and the air inlet shroud 2 are located at one end of the engine 1. The air duct 3 is positioned between the air inlet shroud 2 and the heat exchanger 4, and is connected to both the air inlet shroud 2 and the cold air inlet of the heat exchanger 4. A fan 5, preferably a centrifugal fan, is located at one end of the engine 1 and is positioned inside the air duct 3 to blow the cold airflow entering from the air inlet shroud 2 towards the cold air inlet of the heat exchanger 4.

[0032] The upper part of the air inlet hood 2 has multiple air inlet holes 21, and the lower part of the air inlet hood 2 has a connecting hole 22 that communicates with the air guide tube 3.

[0033] The air guide duct 3 is designed with an inverted "L" shape, and includes a first cylindrical section 31 and a second cylindrical section 32 that are vertically connected. The first cylindrical section 31 is provided with an annular flange 311, the free end of which extends into the interior of the first cylindrical section 31, so that the end of the annular flange 311 is closer to the fan 5. A ventilation hole 312 is provided inside the annular flange 311, and the ventilation hole 312 is coaxially arranged and connected with the connecting hole 22.

[0034] The fan 5 is positioned between the two ends of the air guide duct 3. Preferably, the fan 5 is positioned inside the first cylinder 31 and corresponding to the ventilation hole 312, ensuring that all the cold air passing through the ventilation hole 312 is drawn into the fan 5 and flows towards the heat exchanger 4 after changing direction.

[0035] The second section 32 of the air guide duct 3 is connected to the cold air inlet of the heat exchanger 4. The second section 32 contains two air guide channels 33 and three first silencer components 34. Specifically, the three first silencer components 34 are evenly spaced along the vertical direction, and an air guide channel 33 is formed between adjacent first silencer components 34. The two air guide channels 33 are arranged vertically to evenly divide the total airflow of the first section 31 into two airflow streams. First silencer components 34 are provided on both sides of each air guide channel 33 to reduce noise generation.

[0036] The first noise reduction assembly 34 includes a first air guide plate 341a / 341b / 341c and a first noise reduction cotton 342. The first air guide plate 341a / 341b / 341c is made of metal material. A first cavity is provided inside the first air guide plate 341a / 341b / 341c. A plurality of first perforations are opened on the surface of the first air guide plate 341a / 341b / 341c. The first perforations are connected to the first cavity. The first noise reduction cotton 342 is disposed in the first cavity. Airflow can pass through the first perforations and act on the first noise reduction cotton 342, using the noise reduction cotton to buffer the impact of airflow and absorb noise.

[0037] Combination Figure 2 , Figure 4 and Figure 5 The length of the upper first air guide plate 341b is greater than the length of the middle first air guide plate 341c, and the length of the middle first air guide plate 341c is greater than the length of the lower first air guide plate 341a, ensuring that the cold airflow can enter the two air guide channels 33 evenly.

[0038] In this embodiment, all first air guide plates 341a / 341b / 341b include two end walls and four side walls. The four side walls are connected end to end, and each of the two end walls is connected to one of the four side walls. The two end walls and the four side walls enclose a first cavity. One of the side walls or end walls is connected by a hinge, allowing it to be opened and closed, making it convenient for workers to insert the first sound-absorbing cotton 342 into the first cavity.

[0039] Based on the above, each of the two opposite sidewalls of the first guide vane 341b located on the upper side includes a straight portion 3411 and a transition portion 3412. The two ends of the transition portion 3412 are connected to the straight portion 3411 and the end wall, respectively, to change the direction of the cold airflow. The transition portion 3412 may extend obliquely or in an arc shape, which is not limited here.

[0040] The end walls and all side walls of the first air guide plates 341a / 341b / 341c are provided with as many first perforations as possible. The first perforations can be circular or polygonal. In this embodiment, a circular perforation is used as an example.

[0041] In other embodiments, a first air guide plate located on the lower side is disposed close to the lower inner wall of the second cylinder, forming a first cavity between the first air guide plate and the lower inner wall of the second cylinder, and first sound-absorbing cotton is filled between the first air guide plate and the lower inner wall of the second cylinder. A first air guide plate located on the upper side is disposed close to the upper inner wall of the second cylinder, forming a first cavity between the first air guide plate and the upper inner wall of the second cylinder, and first sound-absorbing cotton is filled between the first air guide plate and the upper inner wall of the second cylinder. A first air guide plate located in the middle is disposed in the middle of the second cylinder, and the first air guide plate includes two end walls and four side walls. The four side walls are connected end to end, and both end walls are connected to the four side walls, forming a first cavity, and first sound-absorbing cotton is filled between the four side walls and the two end walls.

[0042] exist Figure 2 In the middle, the air inlet hood 2 is provided with a second noise reduction component 23 on all four sides of the interior. The second noise reduction component 23 extends along the inner wall of the air inlet hood 2 from the air inlet to the air outlet of the air inlet hood 2.

[0043] The second noise reduction component 23 includes a second air guide plate 231 and a second noise reduction cotton 232. The second air guide plate 231 is made of metal material and has a second cavity inside. The surface of the second air guide plate 231 has multiple second perforations that communicate with the second cavity. The second noise reduction cotton 232 is disposed inside the second cavity.

[0044] Combination Figure 2 and Figure 6 The heat exchanger 4 includes a shell 41, a baffle 42, three baffles 43 and multiple heat exchange tubes 44.

[0045] The housing 41 is provided with a heat exchange chamber 411, a heat exchange air inlet 412, and a heat exchange air outlet 413. The heat exchange chamber 411 is connected to the heat exchange air inlet 412 and the heat exchange air outlet 413. Specifically, the housing 41 includes a first end plate 414, a second end plate 415, and three side plates 416. The three side plates 416 are respectively disposed on three adjacent sides. The first end plate 414 and the second end plate 415 are respectively connected to the two ends of the three side plates 416. A heat exchange chamber 411 is formed between the first end plate 414, the second end plate 415, and the three side plates 416. The heat exchange air inlet 412 and the heat exchange air outlet 413 are both disposed on the side opposite to the middle side plate 416, that is, on the downward side of the housing 41. The first end plate 414 has a plurality of first mounting holes through it; the second end plate 415 has a plurality of second mounting holes through it. The first mounting holes and the second mounting holes are arranged in a one-to-one correspondence.

[0046] A partition 42 is disposed on the outer side of one end of the housing 41, specifically on the second end plate 415. The partition 42 includes a baffle 421 and two connecting plates 422. The baffle 421 is connected between the two connecting plates 422, with one end of the baffle 421 connected to each of the two connecting plates 422. A channel 423 communicating with the outside is formed between the partition 42 and the second end plate 415.

[0047] All heat exchange tubes 44 are arranged within the heat exchange chamber 411, with a preset gap between adjacent heat exchange tubes 44 to facilitate the passage of hot air. The interior of each heat exchange tube 44 is not directly connected to the heat exchange chamber 411. The first end of each heat exchange tube 44 is located within a first mounting hole and communicates with the air guide duct 3; the second end of each heat exchange tube 44 is located within a second mounting hole and communicates with the channel 423. The heat exchange tubes 44 are metal tubes, preferably aluminum tubes.

[0048] All baffles 43 are arranged along the extension direction of the heat exchange tubes 44. A passageway 45 is formed between the side of the baffle 43 away from the heat exchange inlet 412 and the cavity wall of the heat exchange chamber 411. Two first chambers are formed between the first baffle 43 and the second baffle 43, and between the second baffle 43 and the third baffle 43, respectively, allowing hot airflow to enter and exchange heat simultaneously. Two second chambers are formed between the first baffle 43 and the first end plate 414, and between the third baffle 43 and the second end plate 415, respectively. The first chambers are connected to the heat exchange inlet 412 and the passageway 45, respectively, and the second chambers are connected to the passageway 45 and the heat exchange outlet 413, respectively. This ensures that the hot airflow enters from the heat exchange inlet 412, passes through all the heat exchange tubes 44 to reach the passageway 45, and then passes through all the heat exchange tubes 44 before exiting from the heat exchange outlet 413, which helps to improve the heat exchange effect.

[0049] The partition plate 43 has multiple third mounting holes, and the middle part of the heat exchange tube 44 is set in the corresponding third mounting hole. The partition plate 43 can fix the heat exchange tube 44 and prevent the hot airflow from passing directly through the partition plate 43, ensuring that the hot airflow can only pass through the outer periphery of the partition plate 43.

[0050] See Figure 7 A flow equalization plate 46 is provided at the cold air inlet of heat exchanger 4 to ensure that the cold airflow is evenly distributed to each heat exchange tube 44. The flow equalization plate 46 is provided with a third sound-absorbing cotton (not shown in the figure) and multiple hollow protruding tubes 461. Each hollow protruding tube 461 corresponds to one heat exchange tube 44 and is connected to the air guide duct 3 and the corresponding heat exchange tube 44. The third sound-absorbing cotton is placed between two adjacent hollow protruding tubes 461. Preferably, the surface of the third sound-absorbing cotton is flush with the end face of the hollow protruding tube 461, or the surface of the third sound-absorbing cotton is slightly lower than the end face of the hollow protruding tube 461. The placement of the hollow protruding tubes 461 facilitates the laying of the third sound-absorbing cotton and also prevents the third sound-absorbing cotton from entering its interior.

[0051] In one embodiment, the first end plate 414 of the housing 41 is the flow equalization plate 46, and one end of the heat exchange tube 44 passes through the first mounting hole. The part that passes through is the hollow convex tube 461, ensuring that the hollow convex tube 461 is connected to the heat exchange tube 44 and there is no leakage.

[0052] In another embodiment, the flow equalization plate 46 is independently set and is fixedly set on the first end plate 414 of the housing 41 by screws, and the hollow convex tube 461 is connected to the heat exchange tube 44.

[0053] In summary, by setting the first air guide plate 341a, this utility model can guide the airflow along a fixed path, avoid disorderly diffusion of the airflow in the air guide duct 3, reduce the generation of eddies and reduce the ineffective circulation of the airflow in the air guide channel 33, and ensure that the airflow enters the heat exchanger 4 quickly and accurately. By setting the first sound-absorbing cotton 342 inside the first air guide plate 341a, it can buffer the direct impact of the airflow on the air guide plate while guiding the airflow, and reduce the generation of turbulent noise. In addition, the air guide plate is made of metal material, and the metal wall surface has a high reflectivity of noise. If there is no sound-absorbing cotton inside the first air guide plate 341a, the noise generated by the airflow will be repeatedly reflected between the walls of the air guide channel 33, forming secondary noise. The setting of the first sound-absorbing cotton 342 can effectively prevent the noise from being superimposed and enhanced.

[0054] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An engine cooling system, comprising an engine, an air intake shroud, an air duct, and a heat exchanger, wherein the air duct is disposed between the air intake shroud and the heat exchanger, the air duct is connected to the cold air inlet of both the air intake shroud and the heat exchanger, a fan is disposed at one end of the engine, the fan is disposed inside the air duct, and the engine's heat dissipation vent is connected to the heat exchange air inlet of the heat exchanger, characterized in that: The air duct is provided with at least one air duct channel and at least two first noise reduction components. The first noise reduction components are provided on both sides of the air duct channel. The first noise reduction component includes a first air guide plate and a first noise reduction cotton. The first air guide plate is provided with a first cavity. The surface of the first air guide plate is provided with a plurality of first perforations. The first perforations are connected to the first cavity. The first noise reduction cotton is provided in the first cavity.

2. The engine cooling system according to claim 1, characterized in that: The first air guide plate includes two end walls and four side walls. The four side walls are connected end to end, and the two end walls are respectively connected to the four side walls. The two end walls and the four side walls form the first cavity.

3. The engine cooling system according to claim 1, characterized in that: The first air guide plate is disposed near the inner wall of the air guide tube, and the first air guide plate and the inner wall of the air guide tube form the first cavity.

4. The engine cooling system according to claim 1, characterized in that: The number of the first silencing components is set to three, and the three first silencing components are arranged at intervals, with the air guide channel formed between two connected first silencing components.

5. The engine cooling system according to any one of claims 1 to 4, characterized in that: The air guide duct includes a first cylindrical section and a second cylindrical section that are connected. The first cylindrical section is provided with an annular flange. The free end of the annular flange extends into the interior of the first cylindrical section. A ventilation hole is provided in the annular flange. The fan is disposed inside the first cylindrical section and is positioned corresponding to the ventilation hole.

6. The engine cooling system according to any one of claims 1 to 4, characterized in that: The air inlet shroud is equipped with a second noise reduction component on all four sides of its interior, and the second noise reduction component extends from the air inlet of the air inlet shroud to the air outlet of the air inlet shroud.

7. The engine cooling system according to claim 6, characterized in that: The second noise reduction component includes a second air guide plate and a second noise reduction cotton. The second air guide plate has a second cavity inside, and a plurality of second perforations are opened on the surface of the second air guide plate. The second perforations are connected to the second cavity, and the second noise reduction cotton is disposed in the second cavity.

8. The engine cooling system according to any one of claims 1 to 4, characterized in that: The heat exchanger includes a shell, a partition, at least two partitions, and multiple heat exchange tubes; The shell is provided with a heat exchange chamber, a heat exchange air inlet and a heat exchange air outlet, and the heat exchange chamber is connected to the heat exchange air inlet and the heat exchange air outlet respectively. The partition is disposed on the outer side of one end of the housing, and a channel communicating with the outside is formed between the partition and the end wall of the housing. All the heat exchange tubes are arranged in the heat exchange cavity, one end of the heat exchange tube is connected to the air guide tube, and the other end of the heat exchange tube is connected to the channel; All the partitions are arranged along the extension direction of the heat exchange tubes. The middle part of the heat exchange tubes is fixed on the partitions. A passage is formed between the side of the partition away from the heat exchange air inlet and the cavity wall of the heat exchange chamber. The heat exchange air inlet is connected to the heat exchange air outlet through the passage.

9. The engine cooling system according to claim 8, characterized in that: The partition includes a baffle and two connecting plates. The baffle is connected between one end of each of the two connecting plates, and the channel is formed between the baffle and the two connecting plates.

10. The engine cooling system according to claim 8, characterized in that: The heat exchanger is provided with a flow equalization plate at the cold air inlet end. The flow equalization plate is provided with a third sound-absorbing cotton and a plurality of hollow convex tubes. The hollow convex tubes are respectively connected to the air guide tube and the corresponding heat exchange tube. The third sound-absorbing cotton is disposed between two adjacent hollow convex tubes.

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