Cooling air duct structure and generator set

Abstract

The utility model provides a kind of cooling air duct structure and generating set, cooling air duct structure includes power main body, first shell, motor body, second impeller, second shell, muffler body and third shell.First shell is located at the rear side of power main body, and motor body and second impeller are all installed in first shell.Muffler body and third shell are all located in second shell, and third shell is surrounded in muffler body outside, and first exhaust passage is formed between third shell and muffler body, and one end of first exhaust passage is communicated with second cavity.By reasonably setting third shell, it is surrounded in muffler body outside and forms first exhaust passage, and the airflow after cooling motor body can only enter first exhaust passage, and cooling airflow can be directly and fully exchanged with muffler body when flowing through first exhaust passage, so as to quickly take away the heat of muffler body, so that the cooling effect of muffler body is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of generator set technology, specifically to a cooling air duct structure and a generator set. Background Technology

[0002] During operation, generator sets continuously generate heat from components such as the engine, motor, and muffler. If this heat cannot be dissipated in time, the components will overheat, affecting the equipment's operating efficiency. Simultaneously, the muffler produces noise during operation; improper noise control can disturb the surrounding environment, failing to meet environmental protection and user comfort requirements.

[0003] The existing cooling duct design has many shortcomings. On the one hand, the direction of the cooling airflow is unreasonable, making it difficult to cool the muffler in a targeted manner, resulting in poor cooling effect on the muffler. On the other hand, the exhaust air of different components (such as cylinder head and motor) is prone to mutual interference, further reducing the overall cooling efficiency, and the noise control effect is also not ideal.

[0004] Therefore, a cooling duct structure is proposed that can achieve efficient cooling of the muffler, avoid exhaust interference, and reduce noise. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a cooling air duct structure and a generator set to solve or at least alleviate one or more of the above-mentioned technical problems or other problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides a cooling duct structure, including a power unit having a first cavity, a first impeller, and a first output shaft. The first cavity is located on the front side of the power unit, and the first impeller is located inside the first cavity and connected to the first output shaft. A first housing is located on the rear side of the power unit, and a second cavity is provided inside the first housing. A motor body is located inside the second cavity and connected to the first output shaft. A second impeller is located inside the second cavity and connected to the first output shaft. A second housing is located above the first housing and communicates with the first cavity. The second housing has a first exhaust port. A silencer body is located inside the second housing. A third housing is located inside the second housing and surrounds the silencer body. A first exhaust channel is formed between the third housing and the silencer body. One end of the first exhaust channel communicates with the second cavity, and the other end of the first exhaust channel has a second exhaust port facing the first exhaust port.

[0007] Preferably, the first exhaust duct extends along the arc-shaped outer wall of the muffler body, and the second exhaust port is located on the side of the muffler body opposite to the second housing.

[0008] Preferably, the third housing has an air-guiding inner wall, which is arc-shaped, and the first exhaust channel is located between the air-guiding inner wall and the arc-shaped outer wall of the silencer body.

[0009] Preferably, there are two of each of the first housing, the motor body, and the second impeller. The two first housings are arranged side by side on the rear side of the power body, and the first exhaust duct is connected to the two second cavities respectively. It also includes a transmission assembly and two second output shafts. The two second output shafts are mounted on the power body. Each second output shaft extends into the corresponding second cavity and is connected to the corresponding motor body and the second impeller. The transmission assembly is used to drive the first output shaft to the two second output shafts.

[0010] Preferably, the system further includes a partition, which is disposed within the first exhaust duct and divides the first exhaust duct into two sub-ducts. The partition also divides the second exhaust outlet into two sub-exhaust outlets, with each sub-duct connecting to the corresponding second cavity and the sub-exhaust outlet.

[0011] Preferably, the top of the first housing is provided with an air outlet communicating with the second cavity, and the third housing is provided with two air inlets communicating with the first exhaust channel. Each air inlet is connected to the corresponding air outlet, and a third exhaust port is formed between the two air inlets, with the third exhaust port facing the first exhaust port.

[0012] Preferably, the third housing has an air-guiding outer wall, the air-guiding outer wall is arc-shaped, and a second exhaust channel is formed between the third housing and the second housing, the second exhaust channel being connected to the first exhaust port.

[0013] Preferably, the first housing has a first air inlet on the side near the power body that communicates with the second cavity, and the motor body is located between the power body and the second impeller.

[0014] Preferably, the second housing is connected to both the power unit and the first housing.

[0015] This utility model also provides a generator set, including the above-mentioned cooling air duct structure.

[0016] The beneficial effects of this utility model are:

[0017] This utility model discloses a cooling air duct structure and generator set. By reasonably setting a third shell, it surrounds the muffler body and forms a first exhaust air channel. Since the first exhaust air channel is connected to the second cavity, the airflow after cooling the motor body can only enter the first exhaust air channel. When the cooling airflow flows through the first exhaust air channel, it can directly and fully exchange heat with the muffler body, thereby quickly removing the heat of the muffler body. In this way, the cooling effect on the muffler body is greatly improved.

[0018] Meanwhile, the silencer itself has a noise reduction function, and the third shell surrounds the silencer body to form a physical barrier, which can block and reflect the noise of the silencer body. In addition, the airflow in the first exhaust channel is stable and will not generate additional airflow noise. Under the dual effect, the noise during the operation of the equipment is effectively reduced.

[0019] In addition, the second housing is connected to the first cavity. After the airflow cools the cylinder head of the power unit, it enters the second housing and is discharged from the first exhaust port. Meanwhile, the airflow cools the motor body and the muffler body through the first exhaust channel and is discharged from the second exhaust port. The two airflow paths are completely independent, which solves the problem of mutual interference between the cylinder head exhaust and the motor exhaust in the traditional structure and avoids the problem of reduced cooling efficiency caused by airflow turbulence. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of a cooling duct structure provided in an embodiment of the present invention;

[0022] Figure 2 This is a structural diagram of one side of the first air vent;

[0023] Figure 3 This is a structural diagram showing the structure after partially concealing the power unit.

[0024] Figure 4 A schematic diagram showing the structure in which the first housing, the third housing, and the muffler body assemble;

[0025] Figure 5 This is a schematic diagram of the bottom structure of the third shell;

[0026] Figure 6 This is a schematic diagram of the first exhaust duct.

[0027] Figure 7 for Figure 6 Side view in the current state;

[0028] Figure 8 This is a schematic diagram of the third shell structure;

[0029] Figure 9 This is a schematic diagram of the transmission assembly.

[0030] Figure 10 This is a schematic diagram of the internal structure of the first shell;

[0031] Figure label:

[0032] 10. Power unit; 11. First output shaft; 12. First gear; 13. Second gear; 14. Second output shaft; 20. First housing; 21. Second cavity; 22. Air outlet; 23. First air inlet; 30. Motor body; 40. Second impeller; 50. Second housing; 51. First exhaust port; 60. Silencer body; 70. Third housing; 71. Inner wall of air guide; 72. Partition; 73. Air inlet duct; 74. Third exhaust port; 75. Outer wall of air guide; 80. First exhaust channel; 81. Second exhaust port; 90. Second exhaust channel. Detailed Implementation

[0033] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0034] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] like Figure 1-10 As shown, in one embodiment of this utility model, a cooling duct structure is provided, including a power unit 10, a first housing 20, a motor body 30, a second impeller 40, a second housing 50, a muffler body 60, and a third housing 70. The power unit 10 is an engine, having a first chamber, a first impeller (not shown in the figure), and a first output shaft 11. The first chamber is located on the front side of the power unit 10, and the first impeller is located inside the first chamber and connected to the first output shaft 11. A second air inlet hole communicating with the first chamber is opened on the air guide shroud of the power unit 10. When the power unit 10 is running, the first output shaft 11 (crankshaft) drives the first impeller to rotate, generating negative pressure in the first chamber, thereby drawing external cold air into the first chamber to cool the cylinder head, cylinder block, and other components of the power unit 10.

[0040] The first housing 20 is fixedly installed on the rear side of the power unit 10. A second cavity 21 is formed inside the first housing 20. The motor body 30 and the second impeller 40 are both installed in the second cavity 21. The rotor of the motor body 30 and the second impeller 40 are respectively connected to the first output shaft 11. A first air inlet 23 is provided on the first housing 20. The rotation of the first output shaft 11 will also synchronously drive the second impeller 40 and the rotor of the motor body 30 to rotate. The second impeller 40 will draw the external airflow into the second cavity 21 through the first air inlet 23, thereby cooling the motor body 30.

[0041] The second housing 50 is fixedly installed above the first housing 20. The second housing 50 communicates with the first cavity, allowing airflow from the first cavity to enter the second housing 50. The second housing 50 is provided with a first exhaust port 51, from which airflow can be discharged. The muffler body 60 is fixedly installed inside the second housing 50, with its exhaust port facing the first exhaust port 51. The third housing 70 is installed inside the second housing 50 and surrounds the muffler body 60. A first exhaust channel 80 is formed between the third housing 70 and the muffler body 60 (see reference). Figure 6 and Figure 7 One end of the first exhaust duct 80 is connected to the second cavity 21, and the other end of the first exhaust duct 80 is provided with a second exhaust port 81, which faces the first exhaust port 51. The airflow that has cooled the motor body 30 will enter the first exhaust duct 80, cool the muffler body 60 as it flows through the first exhaust duct 80, and then be discharged from the second exhaust port 81.

[0042] This embodiment discloses a cooling air duct structure, which, by reasonably setting a third housing 70, surrounds the muffler body 60 and forms a first exhaust air duct 80. Since the first exhaust air duct 80 is connected to the second cavity 21, the airflow after cooling the motor body 30 can only enter the first exhaust air duct 80. When the cooling airflow flows through the first exhaust air duct 80, it can directly and fully exchange heat with the muffler body 60, thereby quickly removing the heat from the muffler body 60. In this way, the cooling effect on the muffler body 60 is greatly improved.

[0043] Meanwhile, the silencer body 60 itself has a noise reduction function, and the third housing 70 surrounds the silencer body 60 to form a physical barrier, which can block and reflect the noise of the silencer body 60. In addition, the airflow in the first exhaust channel 80 is stable and will not generate additional airflow noise. Under the dual effect, the noise during the operation of the equipment is effectively reduced.

[0044] In addition, the second housing 50 is connected to the first cavity. After the airflow cooling the cylinder head of the power unit 10 enters the second housing 50, it will be discharged from the first exhaust port 51. Meanwhile, the airflow cooling the motor body 30 and the muffler body 60 will be discharged from the second exhaust port 81 through the first exhaust channel 80. The two airflow paths are completely independent, which solves the problem of mutual interference between the cylinder head exhaust and the motor exhaust in the traditional structure and avoids the problem of reduced cooling efficiency caused by airflow turbulence.

[0045] See Figure 6 and Figure 7 In one embodiment, the first exhaust duct 80 extends along the arc-shaped outer wall of the muffler body 60, and the second exhaust port 81 is located on the side of the muffler body 60 opposite to the second housing 50. This structural design can extend the flow path of the cooling airflow in the first exhaust duct 80, significantly increasing the contact time between the cooling airflow and the arc-shaped outer wall of the muffler body 60, resulting in more thorough heat exchange and further improving the cooling effect on the muffler body 60.

[0046] Meanwhile, the airflow cooled by the cylinder head of the power unit 10 enters the second housing 50 and is discharged from the first exhaust port 51. Therefore, the position and orientation of the second exhaust port 81 are designed so that the airflow discharged from the second exhaust port 81 is in the same direction as the airflow discharged above, avoiding the two airflows from colliding with each other when discharged, ensuring smooth exhaust airflow and reducing the additional noise caused by airflow collision.

[0047] In one embodiment, the third housing 70 has an inner air guide wall 71, which is arc-shaped. A first exhaust duct 80 is disposed between the inner air guide wall 71 and the arc-shaped outer wall of the muffler body 60. The inner air guide wall 71 and the arc-shaped outer wall of the muffler body 60 form a smooth arc-shaped structure for the first exhaust duct 80. This arc-shaped structure guides the cooling airflow to flow smoothly along the inner wall of the first exhaust duct 80, ensuring that the airflow maintains a sufficient velocity to act on the muffler body 60, thus improving heat exchange efficiency. Simultaneously, the smooth airflow also avoids noise generation, further reducing the overall noise of the equipment. Furthermore, compared to a flat inner wall, the arc-shaped inner wall allows noise to attenuate after multiple reflections within the first exhaust duct 80, reducing the amount of noise transmitted to the outside and further enhancing the overall noise reduction effect.

[0048] See Figure 9In one embodiment, two first housings 20, two motor bodies 30, and two second impellers 40 are provided. The two first housings 20 are arranged side by side on the rear side of the power body 10, and the first exhaust duct 80 is connected to the two second cavities 21 respectively. The power body 10 also includes a transmission assembly and two second output shafts 14. The two second output shafts 14 are rotatably fitted on the power body 10. Each second output shaft 14 extends into the corresponding second cavity 21 and is connected to the corresponding motor body 30 and second impeller 40. The transmission assembly is used to drive the first output shaft 11 to the two second output shafts 14.

[0049] Specifically, the power unit 10 has a third cavity (not shown in the figure) on its rear side. The transmission assembly includes a first gear 12 and two second gears 13. The first gear 12 is fixedly mounted on the first output shaft 11, and each second gear 13 is fixedly mounted on a corresponding second output shaft 14. The second gear 13 meshes with the first gear 12. The diameter of the second gear 13 is smaller than the diameter of the first gear 12. The transmission assembly is existing technology and will not be described in detail in this embodiment.

[0050] By designing two parallel motor bodies 30 on the rear side of the power unit 10, compared to a conventional single-motor generator set, the design of two parallel motor bodies 30 allows for a smaller size of the motor body 30 and a more compact overall structure, significantly reducing the volume, weight, and cost of models with the same displacement. The transmission assembly design transmits the power from the first output shaft 11 to the two second output shafts 14. Simultaneously, since the diameter of the second gear 13 is smaller than that of the first gear 12, it achieves the purpose of speeding up the second gear 13. Thus, without changing the speed of the first output shaft 11, high-speed output of the second output shaft 14 can be achieved, thereby improving power generation conversion efficiency and further saving energy and costs.

[0051] The first exhaust duct 80 is connected to the two second chambers 21 respectively, and the cooling airflow discharged from the two second chambers 21 can be introduced into the first exhaust duct 80 at the same time to cool the muffler body 60, thereby further increasing the flow rate and cooling intensity of the cooling airflow and enhancing the cooling effect on the muffler body 60.

[0052] In one embodiment, the third housing 70 further includes a partition 72, which is fixedly installed in the first exhaust duct 80. The partition 72 divides the first exhaust duct 80 into two sub-ducts and the second exhaust port 81 into two sub-exhaust ports. Each sub-duct is connected to the corresponding second cavity 21 and the sub-exhaust port.

[0053] The cooling airflows exiting from the two second chambers 21 flow in their respective sub-channels, preventing the two airflows from mixing and becoming turbulent within the first exhaust channel 80. This ensures that each airflow acts stably on its corresponding area of ​​the muffler body 60, guaranteeing uniform cooling of the muffler body 60 and improving the overall cooling effect. Furthermore, the separate exhaust vents further prevent mutual interference during exhaust, ensuring smooth airflow.

[0054] In one embodiment, the top of the first housing 20 is provided with an air outlet 22 communicating with the second cavity 21, and the third housing 70 is provided with two air inlets 73 communicating with the first exhaust channel 80. Each air inlet 73 is connected to the corresponding air outlet 22, and a third exhaust port 74 is formed between the two air inlets 73, facing the first exhaust port 51. After the airflow (from the first cavity) cooled by the cylinder head enters the second housing 50, it flows through the gap between the third housing 70 and the second housing 50 to the first exhaust port 51. Therefore, the setting of the third exhaust port 74 increases the exhaust path of the second housing 50, so that the airflow can be smoothly discharged from the third exhaust port 74, reducing the obstruction effect of the third housing 70 on the airflow.

[0055] In one embodiment, the third housing 70 has an arc-shaped air guide outer wall 75, forming a second exhaust channel 90 between the third housing 70 and the second housing 50. The second exhaust channel 90 communicates with the first exhaust port 51. After the airflow cooled by the cylinder head enters the second housing 50, it will be discharged from the second exhaust channel 90 to the first exhaust port 51. The arc-shaped air guide outer wall 75 can guide this airflow to flow smoothly, avoiding turbulence caused by abrupt changes in the channel cross-section. At the same time, the air guide outer wall 75 can also further block the noise of the muffler body 60, enhancing the noise reduction effect.

[0056] In one embodiment, the first housing 20 has a first air inlet 23 communicating with the second cavity 21 on the side near the power body 10, and the motor body 30 is located between the power body 10 and the second impeller 40. During operation, the second impeller 40 draws external airflow into the second cavity 21 through the first air inlet 23. Since the second air inlet is close to the power body 10, this airflow also carries away some of the heat from the power body 10, thereby improving the cooling effect on the power body 10.

[0057] In one embodiment, the second housing 50 is connected to both the power unit 10 and the first housing 20. Compared to a structure connected to only a single component, this increases overall rigidity, effectively resisting vibrations generated during equipment operation, preventing the second housing 50 from shifting or being damaged due to vibration, ensuring the stability of the cooling duct structure, and extending the equipment's service life. Simultaneously, the stable connection structure reduces gaps or collisions between the second housing 50 and the power unit 10 and the first housing 20 caused by vibration, thereby reducing vibration noise.

[0058] This embodiment also provides a generator set, including the cooling duct structure described above. Because it employs the aforementioned cooling duct structure, it has the same working principle and technical effects as the cooling duct structure in the above embodiments, and will not be repeated here.

[0059] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A cooling air duct structure, characterized in that, include: The power body (10) has a first cavity, a first impeller and a first output shaft (11). The first cavity is located on the front side of the power body (10), and the first impeller is located in the first cavity and connected to the first output shaft (11). A first housing (20) is provided on the rear side of the power body (10), and a second cavity (21) is provided inside the first housing (20); The motor body (30) is located in the second cavity (21) and connected to the first output shaft (11); The second impeller (40) is located in the second cavity (21) and is connected to the first output shaft (11); The second housing (50) is located above the first housing (20), and the second housing (50) communicates with the first cavity. The second housing (50) is provided with a first exhaust port (51). The muffler body (60) is disposed within the second housing (50); and A third housing (70) is disposed inside the second housing (50) and surrounds the muffler body (60). A first exhaust channel (80) is formed between the third housing (70) and the muffler body (60). One end of the first exhaust channel (80) is connected to the second cavity (21), and the other end of the first exhaust channel (80) is provided with a second exhaust port (81). The second exhaust port (81) faces the first exhaust port (51).

2. The cooling duct structure according to claim 1, characterized in that, The first exhaust duct (80) extends along the arc-shaped outer wall of the silencer body (60), and the second exhaust port (81) is located on the side of the silencer body (60) away from the second housing (50).

3. The cooling duct structure according to claim 2, characterized in that, The third housing (70) has an air guide inner wall (71) which is arc-shaped, and the first exhaust channel (80) is located between the air guide inner wall (71) and the arc-shaped outer wall of the silencer body (60).

4. The cooling duct structure according to claim 2, characterized in that, Two of each of the first housing (20), the motor body (30), and the second impeller (40) are provided. The two first housings (20) are arranged side by side on the rear side of the power body (10). The first exhaust duct (80) is connected to the two second cavities (21) respectively. It also includes a transmission assembly and two second output shafts (14). The two second output shafts (14) are mounted on the power body (10). Each second output shaft (14) extends into the corresponding second cavity (21) and is connected to the corresponding motor body (30) and the second impeller (40). The transmission assembly is used to drive the first output shaft (11) to the two second output shafts (14).

5. The cooling duct structure according to claim 4, characterized in that, It also includes a partition (72), which is disposed in the first exhaust channel (80). The partition (72) divides the first exhaust channel (80) into two sub-channels and divides the second exhaust port (81) into two sub-exhaust ports. Each sub-channel is connected to the corresponding second cavity (21) and the sub-exhaust port.

6. The cooling duct structure according to claim 4, characterized in that, The top of the first housing (20) is provided with an air outlet (22) communicating with the second cavity (21). The third housing (70) is provided with two air inlets (73) communicating with the first exhaust channel (80). Each air inlet (73) is connected to the corresponding air outlet (22). A third exhaust port (74) is formed between the two air inlets (73) and faces the first exhaust port (51).

7. The cooling duct structure according to claim 2, characterized in that, The third housing (70) has an air guide outer wall (75) which is arc-shaped. A second exhaust channel (90) is formed between the third housing (70) and the second housing (50), and the second exhaust channel (90) is connected to the first exhaust port (51).

8. The cooling duct structure according to claim 1, characterized in that, The first housing (20) has a first air inlet (23) on the side near the power body (10) that communicates with the second cavity (21), and the motor body (30) is located between the power body (10) and the second impeller (40).

9. The cooling duct structure according to claim 1, characterized in that, The second housing (50) is connected to the power body (10) and the first housing (20) respectively.

10. A generator set, characterized in that, The cooling duct structure includes any one of claims 1 to 9.

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