Dual-motor frequency conversion generator set

Abstract

The utility model provides a double-motor frequency conversion generator set. The double-motor frequency conversion generator set comprises a first shell, a power main body, two second output shafts, a gear transmission assembly, two motor bodies and two impellers. A first cavity and two second cavities are formed in the first shell, the second cavities are provided with air inlet holes and air exhaust holes, and the power body is arranged on the front side of the first shell. Each second output shaft corresponds to one second cavity, the gear transmission assembly is used for enabling the first output shaft to be in transmission connection with the two second output shafts, and the motor body is connected with the second output shafts. The impeller is connected with the second output shaft. Compared with a conventional single-motor generator set, the size of the motor body of the double-motor frequency conversion generator set is smaller, the whole machine structure is more compact, and the size, the weight and the cost of a machine type with the same displacement can be reduced. And meanwhile, when the power main body operates, the motor body and the impeller also continuously operate, so that both the power main body and the motor body can operate in a normal working condition environment.

Description

Technical Field

[0001] This utility model relates to the field of generator set technology, specifically to a dual-motor variable frequency generator set. Background Technology

[0002] Conventional generator sets typically have a single-motor structure. Large-displacement, high-power engines usually have large and heavy motors. An overly large generator will affect the overall layout of the unit and also impact factors such as cost, weight, and strength. Furthermore, existing generator sets generally mount the impeller and generator in front of the engine. The airflow generated by the impeller must cool both the generator and the engine, resulting in poor cooling performance and low cooling efficiency for both. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dual-motor variable frequency generator set with a more compact overall structure and improved cooling effect on the power unit and motor body.

[0004] To achieve the above objectives, this utility model provides a dual-motor variable frequency generator set, comprising a first housing, a first cavity and two second cavities, the first cavity being located near the front side of the first housing, and the two second cavities being arranged side-by-side at the rear side of the first cavity, each second cavity having an air inlet and an air outlet, the air inlet being located at the front side of the second cavity; a power unit located at the front side of the first housing, the power unit having a first output shaft extending into the first cavity; two second output shafts, each corresponding to one second cavity, the second output shafts extending into the first cavity and the second cavity respectively; a gear transmission assembly located in the first cavity, the gear transmission assembly being used to drive the first output shaft and the two second output shafts; two motor bodies located in the two second cavities respectively, the motor bodies being connected to the second output shafts; and two impellers located in the two second cavities respectively, the impellers being connected to the second output shafts, the impellers being located on the side of the motor body opposite to the air inlet.

[0005] Preferably, the axes of the two second output shafts are at the same horizontal level.

[0006] Preferably, the exhaust port is located near the impeller.

[0007] Preferably, it further includes a second housing and a muffler body. The second housing is disposed on the power unit and located above the first housing. The muffler body is disposed inside the second housing. The second housing is provided with an exhaust port, and the two exhaust ports communicate with the inner cavity of the second housing.

[0008] Preferably, the first housing is provided with two first legs, and the second housing is provided on the two first legs.

[0009] Preferably, each of the first legs corresponds to one second cavity, and the exhaust hole extends through the first leg.

[0010] Preferably, the first housing is provided with two second feet.

[0011] Preferably, the gear transmission assembly includes a first gear and two second gears, the first gear being connected to the first output shaft, each second gear corresponding to a second output shaft, and the second gear meshing with the first gear.

[0012] Preferably, the diameter of the first gear is larger than the diameter of the second gear.

[0013] The beneficial effects of this utility model are:

[0014] This utility model discloses a dual-motor variable frequency generator set. By designing two motor bodies arranged side-by-side at the rear of the power unit, compared to conventional single-motor generator sets, the motor bodies of this dual-motor variable frequency generator set are smaller, resulting in a more compact overall structure and reducing the volume, weight, and cost of models with the same displacement. Simultaneously, the motor bodies and impellers operate continuously while the power unit is running, allowing both the power unit and motor bodies to operate under normal working conditions. Furthermore, because the air inlet is close to the power unit, the airflow drawn into the second chamber also carries away some of the heat from the power unit, thereby improving the cooling effect on the power unit. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the structure of a dual-motor variable frequency generator set provided in an embodiment of the present invention;

[0017] Figure 2 This is a side view of the dual-motor variable frequency generator set;

[0018] Figure 3 This is a schematic diagram of the structure in which the first output shaft mates with the first housing.

[0019] Figure 4 This is a schematic diagram of the internal structure of the first outer shell;

[0020] Figure 5 This is a schematic diagram of the rear structure of the dual-motor variable frequency generator set;

[0021] Figure 6 A schematic diagram of the arrangement of the motor body and impeller;

[0022] Figure 7 This is a schematic diagram of the gear transmission assembly.

[0023] Figure label:

[0024] 10. First outer casing; 11. First cavity; 12. Second cavity; 13. Air inlet; 14. Air outlet; 15. First support leg; 16. Second support leg; 20. Power unit; 21. First output shaft; 30. Second output shaft; 41. First gear; 42. Second gear; 50. Motor body; 60. Impeller; 70. Second outer casing; 71. Air outlet; 80. Silencer body. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply 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 that the first feature is at a lower horizontal level than the second feature.

[0031] like Figure 1-7 As shown, in one embodiment of this utility model, a dual-motor variable frequency generator set is provided, including a first housing 10, a power unit 20, two second output shafts 30, a gear transmission assembly, two motor bodies 50, and two impellers 60. The first housing 10 has a first cavity 11 and two second cavities 12. The first cavity 11 is located near the front of the first housing 10, and the two second cavities 12 are arranged side-by-side behind the first cavity 11. Each second cavity 12 has an air inlet 13 and an air outlet 14, with the air inlet 13 located at the front of the second cavity 12. The power unit 20 is located at the front of the first housing 10 and has a first output shaft 21 that extends into the first cavity 11. Of course, a separate impeller (not shown in the figures) is also installed inside the power unit 20 to cool it.

[0032] Each second output shaft 30 corresponds to a second cavity 12, and the second output shaft 30 extends into the first cavity 11 and the second cavity 12 respectively. A gear transmission assembly is located in the first cavity 11, and the gear transmission assembly is used to drive the first output shaft 21 to the two second output shafts 30. Two motor bodies 50 are respectively located in the two second cavities 12, and the motor bodies 50 are connected to the second output shafts 30. Two impellers 60 are respectively located in the two second cavities 12, and the impellers 60 are connected to the second output shafts 30, located on the side of the motor body 50 opposite to the air inlet 13.

[0033] When the power unit 20 is running, the first output shaft 21 drives the two second output shafts 30 under the action of the gear transmission assembly, thereby driving the two motor bodies 50 and the two impellers 60 to work simultaneously. Since the air inlet 13 and the impellers 60 are located on both sides of the motor body 50, the external airflow is drawn into the motor body 50 through the air inlet 13 and continuously cools the motor body 50. The cooled airflow is then discharged out of the second chamber 12 through the exhaust port 14, allowing the motor body 50 to operate under normal working conditions.

[0034] In summary, the dual-motor variable frequency generator set disclosed in this embodiment features two side-by-side motor bodies 50 arranged at the rear of the power unit 20. Compared to conventional single-motor generator sets, the motor bodies 50 of this dual-motor variable frequency generator set are smaller, resulting in a more compact overall structure and reducing the volume, weight, and cost of models with the same displacement. Simultaneously, the motor bodies 50 and impeller 60 operate continuously while the power unit 20 is running, ensuring that both the power unit 20 and motor bodies 50 can operate under normal working conditions. Furthermore, because the air inlet 13 is close to the power unit 20, the airflow drawn into the second chamber 12 also carries away some of the heat from the power unit 20, thereby improving the cooling effect on the power unit 20.

[0035] In one embodiment, the axes of the two second output shafts 30 are located at the same horizontal height, thereby optimizing the arrangement of the two motor bodies 50 to make the overall structure more compact.

[0036] In one embodiment, in order to improve the exhaust effect of airflow in the second chamber 12, the exhaust port 14 is located near the impeller 60.

[0037] In one embodiment, the dual-motor variable frequency generator set further includes a second housing 70 and a muffler body 80. The second housing 70 is disposed on the power unit 20 and located above the first housing 10. The muffler body 80 is fixed inside the second housing 70. The second housing 70 is provided with an exhaust port 71, and two exhaust holes 14 communicate with the inner cavity of the second housing 70.

[0038] After cooling the motor body 50, the airflow will be discharged into the second housing 70 through the exhaust port. Since the muffler body 80 is installed inside the second housing 70, the airflow discharged from the exhaust port 14 can cool the muffler body 80 again, and finally be discharged from the exhaust port 71. In this way, the cooling effect on the muffler body 80 is improved.

[0039] In one embodiment, the first housing 10 is provided with two first supports 15, and the second housing 70 is disposed on the two first supports 15. The design of the first supports 15 can support the second housing 70 and the muffler body 80, thereby improving the installation effect of the second housing 70 and the muffler body 80.

[0040] In one embodiment, each first support leg 15 corresponds to a second cavity 12, and an exhaust port 14 passes through the first support leg 15. By designing the first support leg 15 as a hollow structure, it not only supports the second housing 70 and the muffler body 80, but also allows the airflow after cooling the motor body 50 to flow from the exhaust port 14 in the first bracket to the inner cavity of the second housing 70. This eliminates the need for additional airflow channels, thereby simplifying the structural design and saving costs.

[0041] In one embodiment, in order to provide more stable support for the first housing 10, the first housing 10 is provided with two second legs 16.

[0042] In one embodiment, the gear transmission assembly includes a first gear 41 and two second gears 42. The first gear 41 is connected to a first output shaft 21, and each second gear 42 corresponds to a second output shaft 30. The second gears 42 mesh with the first gear 41. The diameter of the first gear 41 is larger than the diameter of the second gears 42.

[0043] Through the transmission between the first gear 41 and the two second gears 42, the power of the first output shaft 21 can be transmitted to the two second output shafts 30. At the same time, since the diameter of the second gear 42 is smaller than that of the first gear 41, the speed of the second gear 42 can be increased. In this way, high-speed output of the second output shaft 30 can be achieved without changing the speed of the first output shaft 21.

[0044] 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.

[0045] 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 dual-motor variable frequency generator set, characterized in that, include: The first outer shell (10) has a first cavity (11) and two second cavities (12). The first cavity (11) is close to the front side of the first outer shell (10), and the two second cavities (12) are arranged side by side on the rear side of the first cavity (11). The second cavity (12) has an air inlet (13) and an air outlet (14). The air inlet (13) is located on the front side of the second cavity (12). A power unit (20) is provided on the front side of the first housing (10), and the power unit (20) has a first output shaft (21) that extends into the first cavity (11); Two second output shafts (30), each second output shaft (30) corresponds to a second cavity (12), and the second output shafts (30) extend into the first cavity (11) and the second cavity (12) respectively; A gear transmission assembly is disposed in the first cavity (11), and the gear transmission assembly is used to drive the first output shaft (21) to two second output shafts (30); Two motor bodies (50) are respectively disposed in two second cavities (12), and the motor bodies (50) are connected to the second output shaft (30); and Two impellers (60) are respectively disposed in two second chambers (12). The impellers (60) are connected to the second output shaft (30). The impellers (60) are located on the side of the motor body (50) away from the air inlet (13).

2. The dual-motor variable frequency generator set according to claim 1, characterized in that, The axes of the two second output shafts (30) are at the same horizontal level.

3. The dual-motor variable frequency generator set according to claim 1, characterized in that, The exhaust port (14) is located near the impeller (60).

4. The dual-motor variable frequency generator set according to claim 3, characterized in that, It also includes a second housing (70) and a muffler body (80). The second housing (70) is disposed on the power unit (20) and located above the first housing (10). The muffler body (80) is disposed inside the second housing (70). The second housing (70) is provided with an exhaust port (71), and two exhaust holes (14) are connected to the inner cavity of the second housing (70).

5. The dual-motor variable frequency generator set according to claim 4, characterized in that, The first outer shell (10) is provided with two first legs (15), and the second outer shell (70) is provided on the two first legs (15).

6. The dual-motor variable frequency generator set according to claim 5, characterized in that, Each of the first legs (15) corresponds to a second cavity (12), and the exhaust hole (14) passes through the first leg (15).

7. The dual-motor variable frequency generator set according to claim 1, characterized in that, The first outer shell (10) is provided with two second legs (16).

8. The dual-motor variable frequency generator set according to claim 1, characterized in that, The gear transmission assembly includes a first gear (41) and two second gears (42). The first gear (41) is connected to the first output shaft (21), and each second gear (42) corresponds to a second output shaft (30). The second gear (42) meshes with the first gear (41).

9. The dual-motor variable frequency generator set according to claim 8, characterized in that, The diameter of the first gear (41) is greater than the diameter of the second gear (42).

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