Heat dissipation and noise reduction system for engineering machinery and engineering machinery

Abstract

The invention provides a heat dissipation and noise reduction system for engineering machinery. The heat dissipation and noise reduction system comprises two radiators (4 and 5) and a noise reduction device (6), wherein the two radiators (4 and 5) are sequentially arranged in the air inlet direction; and a cooling device (6) arranged between the two radiators (4, 5) for cooling air passing therethrough.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation and noise reduction of engineering machinery, and in particular to a heat dissipation and noise reduction system and engineering machinery. Background Art

[0002] As an important equipment for engineering construction, construction machinery has high power and torque, and its working conditions are complex and harsh. There are many heat-generating components during operation, and the heat dissipation demand is large. The heat sources include the engine, hydraulic actuator, transmission system, turbocharger system and air conditioning system, etc. The radiator is usually a water radiator, hydraulic oil radiator, transmission oil radiator, air-to-air intercooler, air conditioning condenser, etc. The speed of construction machinery is slow, and there is almost no headwind. It is necessary to use a fan to force air suction or blowing to cool the system. Due to the small space and many pipelines in the power compartment of construction machinery, the heat dissipation and noise reduction system usually adopts a double-row series arrangement or a multi-row series arrangement. The outside air enters the downstream radiator after heat exchange in the upstream radiator, which causes the inlet air temperature of the downstream radiator to be too high, which seriously reduces the cooling capacity of the downstream radiator. Under high temperature and harsh working conditions, the engine water temperature and oil temperature often rise, which seriously reduces the working performance and service life of the whole construction vehicle.

[0003] In addition, fan noise is an important source of noise for the main engine of construction machinery. Reducing fan noise is of great significance to the noise reduction of the entire vehicle of construction machinery. After the fan is matched with the radiator, the noise after the fan radiator is matched will increase due to the increase in airflow resistance and the change in the gas flow field. Fan noise is divided into rotational noise and eddy noise. Rotational noise is a harmonic noise with obvious frequency components formed by the fan blades periodically hitting the surrounding air; eddy noise is caused by the surrounding gas generating eddy currents when the fan rotates, and the eddy currents split to disturb the air, forming a compression and rarefaction process to generate broadband noise. Obviously, to reduce fan noise, it is necessary to start with reducing fan rotation noise and eddy noise. Therefore, reducing fan noise has become an important issue that needs to be solved urgently. Summary of the invention

[0004] The present application provides a heat dissipation and noise reduction system for engineering machinery, comprising:

[0005] Two radiators arranged in sequence along the air inlet direction; and

[0006] The cooling device is arranged between the two radiators and is used for cooling the air flowing through the radiators.

[0007] In some embodiments, the cooling device includes a circumferential inner wall, a plurality of cooling fins arranged at intervals on the circumferential inner wall, and a cooling channel is formed in each cooling fin.

[0008] In some embodiments, the heat dissipation and noise reduction system includes a plurality of rows of corrugated cooling fins arranged in a staggered manner along an air inlet direction, and each row of cooling fins includes a plurality of corrugated cooling fins arranged at intervals.

[0009] In some embodiments, a water-absorbing material layer is arranged on opposite sides of each cooling fin, and a transverse channel is provided in the cooling fin, which extends from the cooling channel to the water-absorbing material layer so that the water-absorbing material layer absorbs water from the cooling channel.

[0010] In some embodiments, the cooling device includes a silencer chamber arranged around the outer periphery of the circumferential inner wall, for reducing noise from a main engine of the engineering machinery.

[0011] In some embodiments, the silencing chamber is divided into a plurality of silencing sub-chambers along the circumferential direction.

[0012] In some embodiments, the volumes of at least two of the sound-attenuating sub-chambers are different.

[0013] In some embodiments, a noise reducer is provided in at least some of the muffler sub-chambers, and the noise reducer is communicated with the outside through an opening formed on a side of the muffler chamber adjacent to the mainframe.

[0014] In some embodiments, the noise reducer is provided with a small-diameter inlet channel and an outlet channel, the inlet channel is connected to the outside through the opening, a large-diameter intermediate chamber is provided between the inlet channel and the outlet channel, and sound-absorbing material is provided in the inlet channel.

[0015] In some embodiments, the cross-sectional shape of the silencing chamber is a trapezoid that tapers from the outside to the inside.

[0016] In some embodiments, a circumferential water channel is provided in the circumferential inner wall, and the circumferential water channel is divided into an upper water channel and a lower water channel, the upper water channel is connected to the water inlet of the cooling channel of the plurality of cooling fins, and the lower water channel is connected to the water outlet of the cooling channel of the cooling fins.

[0017] In some embodiments, the heat dissipation and noise reduction system includes a water tank, which is in communication with the upper water channel and the lower water channel.

[0018] In some embodiments, the heat dissipation and noise reduction system includes a drainage pipe for conveying condensed water of the engineering machinery air conditioning device to the water tank.

[0019] In some embodiments, the cooling device is detachably mounted between the two heat sinks.

[0020] The present application also provides an engineering machinery, comprising the heat dissipation and noise reduction system.

[0021] In some embodiments, the engineering machinery includes an exhaust pipe, the ventilation area of ​​the cooling device is smaller than the ventilation area of ​​the two radiators, and two negative pressure flow channels respectively connect the ventilation areas of the two radiators beyond the cooling device and the exhaust pipe to apply negative pressure to the ventilation area, thereby facilitating the airflow in the ventilation area to be discharged from the exhaust pipe.

[0022] In some embodiments, the ventilation areas are located at corners of the two substantially rectangular heat sinks.

[0023] In some embodiments, the engineering machine includes a fan for driving air through the heat dissipation and noise reduction system.

[0024] In some embodiments, the two ejector pipes are connected to the exhaust pipe through an ejector cavity, and the ejector cavity is configured to form a negative pressure inside the ejector cavity when the high-speed airflow exhausted by the engine passes through the exhaust pipe, so as to drive the airflow in the ventilation area to be discharged from the exhaust pipe.

[0025] In some embodiments, a one-way valve is provided in each of the two ejection tubes for connecting the ejection tube only when a negative pressure is formed inside the ejection chamber.

[0026] The heat dissipation and noise reduction system of the present application can achieve at least one of the following technical effects:

[0027] By using the cooling device, the air inlet temperature of the downstream radiator is reduced, which is beneficial to improving the cooling capacity of the heat dissipation and noise reduction system;

[0028] By using multiple sub-muffler chambers and / or noise reducers with different volumes and utilizing the effect of impedance composite noise reduction, it will not cause airflow loss and can effectively reduce the rotation harmonic noise and eddy current broadband noise of the fan;

[0029] By arranging the exhaust gas ejection component and utilizing the negative pressure effect of the exhaust gas ejection, the heat dissipation capacity of the radiator corner area with low wind speed is improved.

[0030] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 A schematic diagram of the structure of an engineering machine according to an embodiment of the present application is shown;

[0033] Figure 2 A partial cross-sectional view of a heat dissipation and noise reduction system according to an embodiment of the present application is shown;

[0034] Figure 3 A schematic structural diagram of a cooling device according to an embodiment of the present application is shown;

[0035] Figure 4 A schematic structural diagram of a cooling device according to an embodiment of the present application with the outer shell removed is shown, showing a plurality of muffler sub-chambers and noise reducers located inside;

[0036] Figure 5 Shows Figure 4 An enlarged cross-sectional view of region B in FIG.

[0037] Figure 6 A cross-sectional view of a cooling fin according to an embodiment of the present application is shown;

[0038] Figure 7 A cross-sectional view of a noise reducer according to an embodiment of the present application is shown;

[0039] Figure 8 A schematic diagram of the structure of an engineering machine with an air conditioning device and a drain pipe according to an embodiment of the present application is shown; and

[0040] Fig. 9 A partial enlarged view of the exhaust ejection mechanism according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is merely to facilitate the distinction between corresponding components. "Multiple" means two or more. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, upright, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present application. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0045] like Figure 1 As shown, the engineering vehicle includes an engine 1, a fan 2, an air guide 3, a first radiator 4, a second radiator 5, a cooling device 6 and an exhaust ejection mechanism 7. The heat dissipation and noise reduction system includes the first radiator 4, the second radiator 5 and the cooling device 6. The first radiator 4 and the second radiator 5 are arranged in sequence along the air inlet direction A, and the cooling device 6 is arranged between the first radiator 4 and the second radiator 5. Along the air inlet direction A, the fan 2 is arranged downstream of the first radiator 4, and air is sucked into the engineering vehicle from the outside through the second radiator 5, the cooling device 6, the first radiator 4 and the air guide 3 in sequence. The air first enters the second radiator 5 for heat exchange, and then the air is cooled by the cooling device 6. The cooled air then enters the first radiator 4 for heat exchange, thereby reducing the air inlet temperature of the downstream radiator, which is beneficial to improving the cooling capacity of the downstream radiator.

[0046] like Figure 2 As shown, the cooling device 6 includes a silencer chamber 68 arranged around the outer periphery of the circumferential inner wall 64, which is used to reduce the noise from the main machine of the engineering machinery. The cross-sectional shape of the silencer chamber 68 is a substantially trapezoidal shape that tapers from the outside to the inside. The silencer chamber 68 is surrounded by the circumferential inner wall 64, the circumferential outer wall 61, the first side wall 62 and the second side wall 63. The first side wall 61 connects the cooling device 6 with the first radiator 4, and the second side wall 63 connects the cooling device 61 with the second radiator 5.

[0047] like Figure 3-5 As shown, the cooling device 6 includes a circumferential inner wall 64, and a plurality of cooling fins 65 are arranged at intervals in the space enclosed by the inner periphery of the circumferential inner wall 64. A cooling channel 653 is formed in each cooling fin 65, and water flows in the cooling channel 653 to cool the air flowing through the cooling fins 65. Multiple rows of the cooling fins 65 can be arranged in a staggered manner along the air inlet direction, which can increase the contact area with the airflow and effectively rectify the airflow, so that the air is cooled more fully.

[0048] like Figure 6 As shown, the cooling fin 65 includes a fin body 651, a water-absorbing material layer 652, a cooling water channel 653 and a transverse channel 654. The cooling fin 65 is a hollow structure, and the cooling water channel 653 is provided inside it. A plurality of transverse channels 654 are provided between the cooling water channel 653 and the two side walls of the cooling fin 65. Water-absorbing material layers 652 are provided on the two side walls of the cooling fin 65, respectively. The water-absorbing material layer 652 is made of a material with good water absorption performance. When the cooling water channel 653 is filled with water, the water can reach the water-absorbing material layer 652 through the transverse channel 654. After the water-absorbing material layer 652 absorbs water, heat exchange can be achieved when the hot air flows through its surface, thereby achieving the purpose of evaporative cooling. By providing cooling fins and circumferential water channels, the evaporative cooling effect of water is utilized to reduce the air inlet temperature of the downstream radiator, which is beneficial to improving the cooling capacity of the downstream radiator.

[0049] like Figure 2 and 5 As shown, the circumferential inner wall 64 is hollow, and a circumferential water channel 641 is arranged inside the circumferential water channel 641. Two baffles 645 separate the circumferential water channel 641 into an upper water channel and a lower water channel. The cooling channel 653 of each cooling fin 65 is connected to the upper water channel through the water inlet 642, and the cooling channel 653 of each cooling fin 65 is connected to the lower water channel through the water outlet 643. When the upper water channel of the circumferential water channel 641 is filled with water, water enters the cooling water channel 653 through the water inlet 642, a part of the water is absorbed by the water-absorbing material layer 652, and the other part of the water enters the lower water channel of the circumferential water channel 641.

[0050] like Figure 3 As shown, a water inlet pipe 611, a water pump 612, a water valve 613 and a water outlet pipe 614 are arranged on the circumferential outer wall 61. One end of the water inlet pipe 611 passes through the top of the circumferential outer wall 61 and communicates with the upper water channel of the circumferential waterway 641, and the other end of the water inlet pipe 611 is connected to the water tank 67. The water pump 612 and the water valve 613 connected to the water inlet pipe 611 are also provided, and the water pump 612 is installed on the circumferential outer wall 61. One end of the water outlet pipe 614 passes through the bottom of the circumferential waterway 641 and communicates with the lower part of the circumferential waterway 641, and the other end of the water outlet pipe 614 is connected to the water tank 67. The cooling device 6 also includes a water tank 67 at the bottom, and the water tank 67 is installed on the frame through a mounting seat 672. A filter screen 671 is provided in the water tank 67 for filtering water entering through the water outlet pipe 614 after heat dissipation. The water pump 612 is used to circulate water between the cooling channels and the water tank.

[0051] like Figure 4 As shown, the silencer chamber 68 can be divided into a plurality of silencer sub-chambers 681 along the circumferential direction by a plurality of partitions 69. The volumes of the plurality of silencer sub-chambers 681 can be different. The silencer sub-chamber 681 with a large volume is suitable for absorbing low-frequency noise.

[0052] like Figure 2 , 4 As shown in FIG. 7 , a noise reducer 621 may be provided in some or all of the muffler sub-chambers 681, and the noise reducer 621 is connected to the outside through an opening 621 formed on the side 62 of the muffler chamber 68 adjacent to the main unit. The noise reducer 66 includes a small-diameter inlet channel 661 and an outlet channel 662, and the inlet channel 661 is connected to the outside through the opening 621. A large-diameter intermediate chamber 663 is provided between the inlet channel 661 and the outlet channel 662, and a sound-absorbing material 664 is provided in the inlet channel 661. The small-diameter inlet channel 661 and the outlet channel 662 and the large-diameter intermediate chamber 663 together form a resistance muffler. Due to the presence of the sound-absorbing material 664, the airflow in the cooling air duct will not enter the muffler chamber 68. Through the muffler sub-chambers and noise reducers of different volumes, the effect of impedance composite muffler is achieved, which does not cause airflow loss and can effectively reduce the rotation harmonic noise and eddy current broadband noise of the fan.

[0053] The size of the noise reducer 66 is selected accordingly according to the volume of the muffler sub-chamber. The muffler sub-chamber with a large volume is provided with the noise reducer 66 with a large size, and the muffler sub-chamber with a small volume is provided with the noise reducer 66 with a small size.

[0054] like Figure 8 and 9As shown, the exhaust ejection mechanism 7 includes an exhaust port 71, an exhaust pipe 72, an ejection cavity 73, a first ejection pipe 74, and a second ejection pipe 75. One end of the first ejection pipe 74 and one end of the second ejection pipe 75 are respectively connected to the ejection cavity 73, the other end of the first ejection pipe 74 is connected to the corner area of ​​the first radiator 4, and the other end of the second ejection pipe 75 is connected to the corner area of ​​the second radiator 5. A first check valve 741 is provided between the first ejection pipe 74 and the ejection cavity 73, and a second check valve 751 is provided between the second ejection pipe 75 and the ejection cavity 73. When the high-speed airflow discharged from the engine rushes into the exhaust pipe 72 through the muffler exhaust port 71, only when negative pressure is formed inside the ejection chamber 73, the first one-way valve 741 and the second one-way valve 751 are connected, and the airflow in the corner area of ​​the first radiator 4 and the second radiator 5, which are respectively connected to the first ejection pipe 74 and the second ejection pipe 75, enters the ejection chamber 73 and is discharged to the outside along the exhaust pipe 72. The negative pressure effect of the exhaust ejection is used to improve the heat dissipation capacity of the radiator corner with low wind speed, and the problem of poor heat dissipation capacity of the radiator corner is improved by exhaust ejection. The first one-way valve 741 and the second one-way valve 751 prevent the hot air in the exhaust pipe 72 from entering the first and second radiators through the first ejection pipe 74 and the second ejection pipe 75.

[0055] like Figure 8 As shown, the cooling device 6 also includes a drain pipe 83, one end of which is connected to a water tank 82. The water tank 82 collects condensed water generated when the air-conditioning device 8 is working. The other end of the drain pipe 83 is connected to the water tank 67, so that the condensed water below the ambient temperature discharged when the air-conditioning device 8 is working is replenished into the water tank, which is beneficial to lowering the temperature of the water in the water tank and thus improving the effect of evaporative cooling.

[0056] The cooling device 6 is detachably mounted between the first radiator 4 and the second radiator 5, for example, in a slidable plug-in manner. Figure 3 As shown, the circumferential outer wall 61 is provided with a handle 615, and the cooling device 6 is pulled out and pushed in by the handle 615, so that the cooling device 6 and the first radiator 4 and the second radiator 5 can be quickly disassembled and assembled, and cleaning and maintenance are convenient.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A heat dissipation and noise reduction system for engineering machinery, comprising: Two heat sinks (4, 5) are arranged in sequence along the air inlet direction; as well as A cooling device (6) is arranged between the two radiators (4, 5) and is used to cool the air flowing through the radiator.

2. The heat dissipation and noise reduction system according to claim 1, wherein the cooling device (6) comprises a circumferential inner wall (64), a plurality of cooling fins (65) arranged at intervals on the circumferential inner wall (64), and a cooling flow channel (653) is formed in each cooling fin (65).

3. The heat dissipation and noise reduction system according to claim 2, comprising a plurality of rows of wavy cooling fins (65) arranged alternately along the air inlet direction, each row of cooling fins (65) comprising a plurality of wavy cooling fins (65) arranged at intervals.

4. The heat dissipation and noise reduction system according to claim 2, wherein a water-absorbing material layer (652) is arranged on opposite sides of each cooling fin (65), and a transverse channel (654) is provided in the cooling fin (65), and the transverse channel (654) extends from the cooling channel (653) to the water-absorbing material layer (652), so that the water-absorbing material layer (652) absorbs water from the cooling channel (653).

5. The heat dissipation and noise reduction system according to claim 2, wherein the cooling device (6) comprises a silencer chamber (68) arranged around the outer periphery of the circumferential inner wall (64) for reducing noise from a main engine of the engineering machinery.

6. The heat dissipation and noise reduction system according to claim 5, wherein the silencing chamber (68) is divided into a plurality of silencing sub-chambers (681) along the circumferential direction. 7 . The heat dissipation and noise reduction system according to claim 6 , wherein volumes of at least two silencing sub-chambers are different.

8. The heat dissipation and noise reduction system according to claim 6, wherein a noise reducer (621) is provided in at least some of the noise reduction sub-chambers, and the noise reducer (621) is connected to the outside through an opening (621) formed on the side (62) of the noise reduction chamber (68) adjacent to the host.

9. The heat dissipation and noise reduction system according to claim 8, wherein the noise reducer (66) is provided with an inlet channel (661) and an outlet channel (662) with a small diameter, the inlet channel (661) passes through the opening (621) to communicate with the outside, an intermediate chamber (663) with a large diameter is provided between the inlet channel (661) and the outlet channel (662), and a sound absorbing material (664) is provided in the inlet channel (661).

10. The heat dissipation and noise reduction system according to claim 5, wherein the cross-sectional shape of the silencing chamber (68) is a trapezoid that tapers from the outside to the inside.

11. The heat dissipation and noise reduction system according to claim 5, wherein a circumferential water channel (641) is provided in the circumferential inner wall (64), and the circumferential water channel (641) is divided into an upper water channel and a lower water channel, the upper water channel is connected to the water inlet of the cooling channel (653) of the plurality of cooling fins (65), and the lower water channel is connected to the water outlet of the cooling channel (653) of the cooling fins (65).

12. The heat dissipation and noise reduction system according to claim 11, comprising a water tank (67), wherein the water tank (67) is connected to the upper water channel and the lower water channel.

13. The heat dissipation and noise reduction system according to claim 12, comprising a drainage pipe (81) for conveying condensed water of the engineering machinery air conditioning device (8) to the water tank (67).

14. The heat dissipation and noise reduction system according to claim 1, wherein the cooling device (6) is detachably installed between the two heat sinks (4, 5).

15. An engineering machine, comprising the heat dissipation and noise reduction system according to any one of claims 1 to 14.

16. The engineering machinery according to claim 15, comprising an exhaust pipe (72) and two ejector pipes (74, 75), the ventilation area of ​​the cooling device (6) being smaller than the ventilation area of ​​the two radiators (4, 5), and the two ejector pipes (74, 75) respectively connect the ventilation areas of the two radiators (4, 5) beyond the cooling device (6) with the exhaust pipe (72), so as to discharge the airflow in the ventilation area from the exhaust pipe (72).

17. The construction machine according to claim 16, wherein the ventilation area is located at the corners of the two substantially rectangular radiators (4, 5).

18. The engineering machine according to claim 15, comprising a fan (2) for driving air through the heat dissipation and noise reduction system.

19. The engineering machine according to claim 16, wherein the two ejector pipes (74, 75) are connected to the exhaust pipe (72) through an ejector cavity (73), and the ejector cavity (73) is configured to form a negative pressure inside the ejector cavity (73) when the high-speed airflow exhausted by the engine passes through the exhaust pipe (72), so as to drive the airflow in the ventilation area to be discharged from the exhaust pipe (72).

20. The engineering machine according to claim 19, wherein a one-way valve (741; 751) is provided in each of the two ejector pipes (74, 75) for connecting the ejector pipe only when negative pressure is formed inside the ejector chamber (73).

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