Dual-motor structure and variable frequency generator set

Abstract

The utility model provides a dual-motor structure and a frequency conversion generator set. The dual-motor structure comprises a shell, two rotating shafts, two motor bodies and two first impellers. Two containing cavities are formed in the shell, and each containing cavity is provided with a first air inlet hole and an air exhaust hole. Each rotating shaft extends into the corresponding containing cavity, the two motor bodies are arranged in the two containing cavities respectively, and the motor bodies are connected with the rotating shafts. The two first impellers are arranged in the two containing cavities correspondingly and connected with the rotating shaft. The two independent containing cavities are designed in the shell, in the operation process of the power body, the first impeller and the motor body can be driven to work through the rotating shaft, normal operation of the motor body is guaranteed, and meanwhile effective cooling of the motor body can be achieved. As the shell is installed outside the power main body, the cooling process of the two motor bodies and the cooling process of the power main body are mutually independent, and the heat dissipation and cooling effects of the two motor bodies are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of generator set, concretely relates to a double motor structure and frequency conversion generator set. BACKGROUND

[0002] The existing frequency conversion generator set usually adopts single impeller structure, and the frequency conversion generator set with single impeller structure generally installs impeller and generator on the front side of engine, drives the impeller high-speed rotation through the crankshaft of engine, thereby inhaling airflow into the air scoop to realize the cooling of generator, cylinder body and cylinder head. Since the heat generation of engine is larger, most of the airflow inhaled into the air scoop is used to cool the engine, therefore, the impeller usually adopts centrifugal impeller, that is, axial air inlet and radial air outlet. However, only a small part of airflow is used to cool the generator, and thus the cooling effect of the generator is poor, and the cooling efficiency is low.

[0003] Therefore, how to effectively separate the generator from the engine, so that the cooling process of the engine and the cooling process of the generator do not interfere with each other, and improve the cooling effect of the engine, is a problem to be solved by those skilled in the art. SUMMARY

[0004] In view of the defects in the prior art, the utility model aims to provide a double motor structure and frequency conversion generator set to realize effective cooling of the motor body.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a double motor structure, which comprises an outer shell, two accommodating cavities are arranged in the outer shell, each accommodating cavity is provided with a first air inlet hole and an air outlet hole; two rotating shafts, each rotating shaft extends into the corresponding accommodating cavity; two motor bodies are arranged in the two accommodating cavities respectively, and the motor body is connected with the rotating shaft; and two first impellers are arranged in the two accommodating cavities respectively, and the first impeller is connected with the rotating shaft.

[0006] Preferably, the first impeller is arranged on the side of the motor body away from the first air inlet hole.

[0007] Preferably, each accommodating cavity is provided with a second air inlet hole, and the second air inlet hole is arranged on the side of the first impeller away from the motor body.

[0008] Preferably, the two sides of the first impeller disc are provided with blades.

[0009] Preferably, the utility model further comprises two air scoops, each air scoop is arranged outside the corresponding first air inlet hole, and the air scoop is provided with a fourth air inlet hole.

[0010] The utility model also provides a variable frequency generator set, including above-mentioned double motor structure, still include the muffler body, the muffler body is close to two exhaust hole.

[0011] Preferably, the accommodating cavity is provided with a partition plate, the partition plate separates the accommodating cavity into a first cavity and a second cavity, a third air inlet hole is arranged on the partition plate, the third air inlet hole communicates the first cavity and the second cavity, and the rotating shaft passes through the third air inlet hole; the second air inlet hole communicates with the first cavity, the first impeller and the motor body are arranged in the second cavity, and the first air inlet hole and the exhaust hole communicate with the second cavity.

[0012] Preferably, the utility model also provides a variable frequency generator set, including above-mentioned double motor structure, still include the muffler body, the muffler body is close to two exhaust hole.

[0013] Preferably, the utility model discloses a variable frequency generator set, including double motor structure, still include the muffler body, the muffler body is close to two exhaust hole.

[0014] The utility model discloses a variable frequency generator set, including double motor structure, still include the muffler body, the muffler body is close to two exhaust hole.

[0015] The utility model discloses a variable frequency generator set, including double motor structure, still include the muffler body, the muffler body is close to two exhaust hole. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in prior art, the following will briefly introduce the drawing needed to be used in the specific embodiment or prior art description. In all drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0017] Figure 1 It is the structural schematic diagram of double motor structure provided for the utility model embodiment;

[0018] Figure 2 It is the structural schematic diagram of another side of shell;

[0019] Figure 3 It is the explosion schematic view of motor body, impeller and shell;

[0020] Figure 4 It is the cross section schematic view of shell;

[0021] Figure 5Structure diagram of the shell, the shroud and the muffler body;

[0022] Figure 6 The side view of the frequency conversion generator set provided by the embodiment of the utility model;

[0023] Reference signs:

[0024] 10, shell; 11, accommodating cavity; 111, first cavity; 112, second cavity; 12, first air inlet; 13, air outlet; 14, second air inlet; 20, rotating shaft; 30, motor body; 40, first impeller; 50, partition plate; 51, third air inlet; 60, air baffle; 61, fourth air inlet; 70, muffler body; 80, shroud; 81, air outlet. DETAILED DESCRIPTION

[0025] The embodiments of the technical scheme of the utility model will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, therefore only serve as examples, and cannot limit the protection scope of the utility model.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by the technical personnel in the field to which the utility model belongs.

[0027] In the description of the present application, it should be understood that the orientations or positional relationships indicated by 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" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0028] In addition, the terms "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[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 Figures 1-6 As shown, in one embodiment of this utility model, a dual-motor structure and a variable frequency generator set including the above-mentioned dual-motor structure are provided. The dual-motor structure includes a housing 10, two rotating shafts 20, two motor bodies 30, and two first impellers 40. (See reference...) Figure 6 The outer casing 10 is mounted on the rear side of the power unit, and the front side of the power unit has an air inlet and a second impeller (not shown in the attached diagram). The outer casing 10 contains two receiving cavities 11, each with a first air inlet 12 and an exhaust vent 13. Each rotating shaft 20 extends into a corresponding receiving cavity 11, and the two rotating shafts 20 are respectively connected to the crankshaft of the power unit (e.g., via a gear mechanism; specifically, the crankshaft has a first gear, and the rotating shafts 20 have second gears, each second gear meshing with a first gear). Two motor bodies 30 are respectively housed within the two receiving cavities 11, and the rotors of the motor bodies 30 are connected to the rotating shafts 20. Two first impellers 40 are respectively housed within the two receiving cavities 11, and the first impellers 40 are connected to the rotating shafts 20.

[0032] When the power unit is running, the rotating shaft 20 will drive the first impeller 40 and the rotor of the motor body 30 to rotate at high speed under the drive of the crankshaft. The first impeller 40 will draw the external airflow into the receiving cavity 11 through the first air inlet 12, thereby cooling the stator of the motor body 30. The cooled airflow will then be discharged out of the receiving cavity 11 through the exhaust 13.

[0033] The variable frequency generator set disclosed by the embodiment is characterized in that two independent accommodating cavities 11 are designed in the shell 10, and the rotation shaft 20 drives the first impeller 40 and the motor body 30 to work in the process of operation of the power body, so that the motor body 30 can be effectively cooled while ensuring normal operation of the motor body 30. Since the shell 10 is installed outside the power body, the cooling process of the two motor bodies 30 is independent of the cooling process of the power body, which greatly improves the cooling effect of the two motor bodies 30.

[0034] In one embodiment, the first impeller 40 is arranged on the side of the motor body 30 away from the first air inlet hole 12. In the process of high-speed rotation of the first impeller 40, negative pressure is formed in the accommodating cavity 11, so that the external airflow is sucked into the accommodating cavity 11 through the first air inlet hole 12. Since the motor body 30 is located between the first impeller 40 and the first air inlet hole 12, the cooling airflow continuously cools the stator of the motor body 30, and then is discharged out of the accommodating cavity 11 through the air outlet hole 13. In summary, the position design of the first air inlet hole 12 and the first impeller 40 improves the cooling effect of the motor body 30, so that the motor body 30 can operate in a normal working condition.

[0035] Further, each accommodating cavity 11 is provided with a second air inlet hole 14, and the second air inlet hole 14 is arranged on the side of the first impeller 40 away from the motor body 30. In the process of operation of the first impeller 40, the external airflow is also sucked into the accommodating cavity 11 through the second air inlet hole 14, improving the air inlet effect. Since the second air inlet hole 14 is close to the power body, the airflow also carries away part of the heat of the power body, thereby improving the cooling effect of the power body.

[0036] In one embodiment, in order to improve the air inlet effect of the first air inlet hole 12 and the second air inlet hole 14, the two sides of the first impeller 40 are provided with blades.

[0037] In one embodiment, in order to improve the air inlet effect of the first air inlet hole 12, the double-motor structure further comprises two air deflectors 60, each air deflector 60 is arranged outside the corresponding first air inlet hole 12, and the air deflector 60 is provided with a fourth air inlet hole 61, and the fourth air inlet hole 61 is provided with a protective net (not shown in the drawing).

[0038] In one embodiment, the variable frequency generator set further comprises a muffler body 70, which is close to the two air exhaust holes 13. When the power body is running, the second impeller rotates at high speed, and the external airflow is sucked into the air duct inside the power body through the air inlet, which cools the cylinder head, cylinder and other parts of the power body. After cooling the power body, the airflow also flows to the muffler body 70, thereby cooling the muffler body 70. Since the muffler body 70 is close to the two air exhaust holes 13, the airflow discharged from the air exhaust hole 13 can also cool the muffler body 70, thereby further improving the cooling effect of the muffler body 70.

[0039] In one embodiment, the accommodating cavity 11 is provided with a partition plate 50, which divides the accommodating cavity 11 into a first cavity 111 and a second cavity 112, and the partition plate 50 is provided with a third air inlet hole 51 communicating the first cavity 111 and the second cavity 112, and the rotating shaft 20 passes through the third air inlet hole 51. The second air inlet hole 14 communicates with the first cavity 111, and the first impeller 40 and the motor body 30 are arranged in the second cavity 112, and the first air inlet hole 12 and the air exhaust hole 13 communicate with the second cavity 112.

[0040] After the external airflow is sucked into the first cavity 111, it can only flow to the second cavity 112 through the third air inlet hole 51. Since the first impeller 40 is a centrifugal impeller, the airflow will flow into the first impeller 40 from the axial direction and flow out of the first impeller 40 from the radial direction. Therefore, the cooling airflow will be blown to the muffler body 70 through the air exhaust hole 13, thereby improving the cooling effect of the muffler body 70.

[0041] In one embodiment, the variable frequency generator set further comprises a shield 80, which covers the muffler body 70, and the air exhaust hole 13 communicates with the inner cavity of the shield 80, and the shield 80 is provided with an air outlet 81. Specifically, the shield 80 is fixed on the shell 10. Under the action of the shield 80, the airflow blown out from the air exhaust hole 13 will flow in the gap between the shield 80 and the muffler body 70, thereby improving the cooling effect of the muffler body 70.

[0042] In the specification of the utility model, a large number of specific details are explained. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail, so as not to obscure the understanding of the specification.

[0043] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A dual motor structure characterized by, The utility model relates to a kind of air blower, including: Shell (10) is equipped with two containing cavities (11), each containing cavity (11) is equipped with first air inlet (12) and exhaust hole (13); Two rotating shafts (20), each rotating shaft (20) extends into the containing cavity (11) corresponding to one; Two motor bodies (30) are respectively arranged in two containing cavities (11), and the motor body (30) is connected with the rotating shaft (20);And Two first impellers (40) are respectively arranged in two containing cavities (11), and the first impeller (40) is connected with the rotating shaft (20).

2. The dual motor arrangement of claim 1, wherein, The first impeller (40) is arranged at the side of the motor body (30) away from the first air inlet (12).

3. The dual motor arrangement of claim 2, wherein, Each containing cavity (11) is equipped with second air inlet (14), and the second air inlet (14) is arranged at the side of the first impeller (40) away from the motor body (30).

4. The dual motor arrangement of claim 3, wherein, The two sides of the first impeller (40) wheel disc are equipped with blades.

5. The dual motor arrangement of claim 1, wherein, It also includes two wind scoops (60), each wind scoop (60) is covered outside corresponding first air inlet (12), and the wind scoop (60) is equipped with fourth air inlet (61).

6. A variable frequency generator set comprising the dual motor structure of any one of claims 3-5, characterized in that, It also includes muffler body (70), and the muffler body (70) is close to two exhaust holes (13).

7. The variable frequency generator set of claim 6, wherein, Containing cavity (11) is equipped with baffle (50), and the baffle (50) separates the containing cavity (11) into first chamber (111) and second chamber (112), and third air inlet (51) is arranged on the baffle (50), the third air inlet (51) is communicated with the first chamber (111) and the second chamber (112), and the rotating shaft (20) passes through the third air inlet (51); The second air inlet (14) is communicated with the first chamber (111), and the first impeller (40) and the motor body (30) are arranged in the second chamber (112), and the first air inlet (12) and the exhaust hole (13) are communicated with the second chamber (112).

8. The variable frequency generator set of claim 6, wherein, It also includes shroud (80), and the shroud (80) is covered outside the muffler body (70), and the exhaust hole (13) is communicated with the inner cavity of the shroud (80), and the shroud (80) is equipped with exhaust port (81).

9. The variable frequency generator set of claim 8, wherein, The shroud (80) is arranged on the shell (10).

Images