Side-by-side double-motor variable frequency generator set

Abstract

The invention provides a side-by-side double-motor variable frequency generator set. The side-by-side double-motor variable frequency generator set comprises a power body, a transmission assembly, two second impellers and two motor bodies. Wherein the power main body is provided with a first air inlet, a first impeller, a first cavity, two second cavities, a first output shaft and two second output shafts, and the first cavity and the second cavities are both arranged on the rear side of the power main body. The first output shaft and the second output shafts are arranged in parallel, and the axes of the two second output shafts are located at the same horizontal height. The transmission assembly is used for enabling the first output shaft to be in transmission connection with the two second output shafts and enabling the rotating speed of the second output shafts to be higher than that of the first output shaft. Compared with a conventional single-motor generator set, the side-by-side double-motor frequency conversion generator set has the advantages that the two motor bodies which are arranged side by side are designed on the rear side of the power main body, the motor bodies of the side-by-side double-motor frequency conversion generator set are smaller in size, 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 greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of generator sets, and particularly to a side-by-side dual-motor variable-frequency generator set. Background Art

[0002] Existing variable-frequency generator sets usually adopt a single impeller and single generator structure. In this structure, the impeller and generator of the variable-frequency generator set are generally installed on the front side of the engine, and the crankshaft of the engine is used to drive the impeller to rotate at high speed, so as to suck air flow into the air guide cover to cool the generator, cylinder block, cylinder head, etc. Since the heat generated by the engine is greater, most of the air flow sucked into the air guide cover is used to cool the engine. Therefore, the impeller usually adopts a centrifugal impeller, that is, axial air inlet and radial air outlet. However, in this way, only a small part of the air flow is used to cool the generator, so there is a situation where the cooling effect on the generator is poor and the cooling efficiency is not high.

[0003] At the same time, for variable-frequency generator sets with large displacement and high power, the size of their generators is usually large and heavy. The oversized generator will affect the overall layout of the machine, and also affect many factors such as the overall cost, weight, heat dissipation, and strength. Summary of the Invention

[0004] Aiming at the defects in the prior art, the purpose of the present invention is to provide a side-by-side dual-motor variable-frequency generator set, the overall structure of which is more compact, the volume, weight and cost of models with the same displacement are reduced, and the effective cooling of the motor body can also be realized.

[0005] To achieve the above purpose, the present invention provides a side-by-side dual-motor variable-frequency generator set, including a power main body, which has a first air inlet, a first impeller, a first cavity, two second cavities, a first output shaft and two second output shafts. The first air inlet and the first impeller are both arranged on the front side of the power main body. The first cavity and the second cavities are both arranged on the rear side of the power main body. The first cavity is located between the power main body and the two second cavities. The first output shaft and the second output shafts are arranged in parallel, and the axes of the two second output shafts are at the same horizontal height. The first output shaft and the two second output shafts are all arranged in the first cavity, and each second output shaft extends into the corresponding second cavity.

[0006] A transmission assembly is arranged in the first cavity. The transmission assembly is used to drive the first output shaft to be connected with the two second output shafts, and make the rotational speed of the second output shafts higher than that of the first output shaft. Two second impellers are respectively arranged in the two second cavities. The second impellers are arranged on the second output shafts. And two motor bodies are respectively arranged in the two second cavities. The motor bodies are connected with the second output shafts.

[0007] Preferably, the transmission assembly includes a first gear and two second gears. The first gear is provided on the first output shaft, and each second gear is provided on a corresponding second output shaft. The second gear meshes with the first gear, and the diameter of the second gear is smaller than that of the first gear.

[0008] Preferably, the second impeller is provided between the motor body and the first chamber. The second chamber is provided with a first air inlet hole and an exhaust hole. The first air inlet hole is provided on the side of the motor body away from the second impeller.

[0009] Preferably, a second air inlet hole is provided on the side of the second chamber close to the power main body.

[0010] Preferably, an exhaust air duct is formed between the second impeller and the inner wall of the second chamber. The exhaust air duct communicates with the exhaust hole, and the inner wall of the exhaust air duct is in a volute shape.

[0011] Preferably, it further includes a muffler body. The muffler body is provided on the power main body and close to the two exhaust holes.

[0012] Preferably, it further includes a housing. The housing covers the muffler body. A discharge port is provided on the side of the housing away from the power main body. The exhaust hole communicates with the inner cavity of the housing.

[0013] Preferably, a second air inlet is provided on the side of the housing close to the power main body. A flow guiding plate is provided inside the housing. The flow guiding plate is used to guide the air flow discharged from the exhaust hole to the muffler body.

[0014] Preferably, the power main body includes a first housing, a second housing, and a third housing. The first housing and the second housing are connected to form the first chamber. The third housing is provided on the side of the second housing away from the first housing. The third housing and the second housing are connected to form the second chamber and the two exhaust holes. The first air inlet hole is provided on the third housing.

[0015] Advantages of the present invention:

[0016] A side-by-side dual-motor variable-frequency generator set disclosed by the present invention designs two side-by-side motor bodies at the rear of the power main body. Compared with a conventional single-motor generator set, the motor bodies of the side-by-side dual-motor variable-frequency generator set are smaller in size, the overall structure is more compact, and the volume, weight, and cost of models with the same displacement can be significantly reduced.

[0017] Since the transmission component can increase the rotational speeds of the two second output shafts, high-speed output of the second output shafts can be achieved without changing the rotational speed of the first output shaft. Thus, wear of the moving components inside the power main body housing is reduced, fuel consumption of the whole machine is decreased, and service life of the whole machine is prolonged. Meanwhile, the high-speed output of the second output shafts also drives the rotor of the motor body to rotate at a high speed, thereby improving the power generation conversion efficiency and further saving energy efficiency and cost.

[0018] Moreover, since a set of second impellers and the motor body are installed in each second cavity, the second impellers and the motor bodies in the two second cavities operate independently. While ensuring the normal operation of the motor body, effective cooling of the motor body can also be achieved. Since the second impellers and the motor body are arranged at the rear side of the power main body, the cooling processes of the two motor bodies are independent of the cooling process of the power main body, which greatly improves the heat dissipation and cooling effects of the two motor bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0020] Figure 1 is a schematic structural diagram of a side-by-side dual-motor variable-frequency generator set provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of the cooperation of the first housing, the second housing and the third housing;

[0022] Figure 3 is a schematic structural diagram of the transmission component;

[0023] Figure 4 is a schematic structural diagram of the cooperation of the second housing and the third housing;

[0024] Figure 5 is an exploded schematic diagram of the second housing, the second impeller, the motor body and the third housing;

[0025] Figure 6 is a schematic sectional view of the first cavity and the second cavity;

[0026] Figure 7 is Figure 4 a schematic structural diagram of another view angle in the state;

[0027] Figure 8 is a schematic structural diagram of the muffler body and the housing;

[0028] Figure 9 is Figure 8 a schematic structural view from another perspective in a certain state;

[0029] Figure 10 is a schematic structural view of the deflector installed in the housing;

[0030] Reference numerals:

[0031] 100, power main body; 101, first air inlet; 102, first chamber; 103, second chamber; 104, first output shaft; 105, second output shaft; 106, first air inlet hole; 107, exhaust hole; 108, second air inlet hole; 109, exhaust air duct; 110, first housing; 111, second housing; 112, third housing; 200, transmission component; 201, first gear; 202, second gear; 300, second impeller; 400, motor body; 500, muffler body; 600, housing; 601, air outlet; 602, second air inlet; 700, deflector. Detailed implementation manners

[0032] Hereinafter, embodiments of the technical solutions of the present invention will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and thus are only examples and cannot be used to limit the protection scope of the present invention.

[0033] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present invention belongs.

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0035] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0036] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] As Figure 1-10 shown, in an embodiment of the present invention, a side-by-side dual-motor variable-frequency generator set is provided, which includes a power main body 100, a transmission assembly 200, two second impellers 300 and two motor bodies 400. Among them, the power main body 100 has a first air inlet 101, a first impeller, a first cavity 102, two second cavities 103, a first output shaft 104 and two second output shafts 105. The first air inlet 101 and the first impeller are both arranged on the front side of the power main body 100, the first cavity 102 and the second cavities 103 are both arranged on the rear side of the power main body 100, and the first cavity 102 is located between the power main body 100 and the two second cavities 103. The first output shaft 104 and the two second output shafts 105 are arranged in parallel, and the axes of the two second output shafts 105 are at the same horizontal height. The first output shaft 104 and the two second output shafts 105 are both arranged in the first cavity 102, and each second output shaft 105 extends into the corresponding second cavity 103.

[0039] The transmission assembly 200 is arranged in the first cavity 102. The transmission assembly 200 is used to transmit the first output shaft 104 to the two second output shafts 105 and make the rotational speed of the second output shafts 105 higher than that of the first output shaft 104. The two second impellers 300 are respectively arranged in the two second cavities 103, and the second impellers 300 are arranged on the second output shafts 105. The two motor bodies 400 are respectively arranged in the two second cavities 103, and the rotors of the motor bodies 400 are connected to the second output shafts 105.

[0040] When the power main body 100 operates, the first impeller rotates at a high speed, sucking the external air flow into the air duct inside the power main body 100 through the first air inlet 101. This part of the air flow will cool the components such as the cylinder head and cylinder block of the power main body 100.

[0041] Meanwhile, the transmission assembly 200 will transmit the power of the first output shaft 104 to the two second output shafts 105 and increase the rotational speed of the second output shafts 105. The two second output shafts will drive the corresponding second impellers 300 and the rotor of the motor body 400 to rotate at a high speed. The second impellers 300 will suck the external air flow into the accommodation cavity through the first air inlet holes 106, so as to be able to cool the stator of the motor body 400. The cooled air flow will then be discharged out of the accommodation cavity through the air exhaust holes 107.

[0042] A side-by-side dual-motor variable-frequency generator set disclosed in this embodiment, by designing two side-by-side motor bodies 400 at the rear side of the power main body 100, compared with the conventional single-motor generator set, the size of the motor body 400 of this side-by-side dual-motor variable-frequency generator set is smaller, and the overall structure is more compact, which can greatly reduce the volume, weight and cost of models with the same displacement.

[0043] Since the transmission assembly 200 can increase the rotational speed of the two second output shafts 105, therefore, without changing the rotational speed of the first output shaft 104, it is also possible to achieve a high rotational speed output of the second output shafts 105. In this way, the wear of the moving parts inside the box body of the power main body 100 is reduced, the fuel consumption of the whole machine is lowered, and the service life of the whole machine is extended. At the same time, the high rotational speed output of the second output shafts 105 will also drive the rotor of the motor body 400 to rotate at a high speed, thereby improving the power generation conversion efficiency and further saving energy efficiency and cost.

[0044] Moreover, since a set of second impellers 300 and motor bodies 400 are installed in each second cavity 103, therefore, the second impellers 300 and motor bodies 400 in the two second cavities 103 will operate independently. While ensuring the normal operation of the motor bodies 400, it is also possible to effectively cool the motor bodies 400. Since the second impellers 300 and motor bodies 400 are arranged at the rear side of the power main body 100, therefore, the cooling processes of the two motor bodies 400 are independent of the cooling process of the power main body 100, which greatly improves the heat dissipation and cooling effects of the two motor bodies 400.

[0045] In one embodiment, the transmission assembly 200 includes a first gear 201 and two second gears 202, wherein the first gear 201 is disposed on the first output shaft 104, each second gear 202 is disposed on a corresponding second output shaft 105, and the second gear 202 is meshed with the first gear 201, and the diameter of the second gear 202 is smaller than the diameter of the first gear 201. Through the transmission of the first gear 201 and the two second gears 202, the power of the first output shaft 104 can be transmitted to the two second output shafts 105, and at the same time, since the diameter of the second gear 202 is smaller than the diameter of the first gear 201, the purpose of increasing the speed of the second gear 202 can be achieved, so that the high speed output of the second output shaft 105 can be achieved without changing the speed of the first output shaft 104.

[0046] In one embodiment, the second impeller 300 is disposed between the motor body 400 and the first cavity 102 , the second cavity 103 is provided with a first air inlet 106 and an air outlet 107 , and the first air inlet 106 is disposed on a side of the motor body 400 away from the second impeller 300 .

[0047] When the second output shaft 105 drives the second impeller 300 and the motor body 400 to work, the second impeller 300 will suck the external airflow into the second cavity 103 through the first air inlet 106, and this airflow will cool the stator of the motor body 400, and the cooled airflow will be discharged from the second cavity 103 through the exhaust hole 107. Since the motor body 400 is located between the second impeller 300 and the first air inlet 106, the cooling airflow will continue to cool the stator of the motor body 400 during the process of flowing from the first air inlet 106 to the exhaust hole 107. Therefore, the position design of the second impeller 300, the motor body 400, the first air inlet 106 and the exhaust hole 107 improves the cooling effect on the motor body 400, so that the motor body 400 can operate under normal working conditions.

[0048] In one embodiment, a second air inlet hole 108 is provided on a side of the second cavity 103 close to the power body 100. During operation, the second impeller 300 also draws external airflow into the second cavity 103 through the second air inlet hole 108, thereby improving the air intake effect. Since the second air inlet hole 108 is close to the power body 100, this airflow also takes away a portion of the heat of the power body 100, thereby improving the cooling effect on the power body 100.

[0049] In one embodiment, an exhaust air duct 109 is formed between the second impeller 300 and the chamber wall of the second chamber 103. The exhaust air duct 109 communicates with the exhaust holes 107, and the inner wall of the exhaust air duct 109 is in a volute shape. The structural design of the exhaust air duct 109 enables the second impeller 300 to reduce the disturbance and noise of the air flow during operation, ensuring that the air flow does not deviate during the process of flowing towards the exhaust holes 107, thereby improving the exhaust effect, and accordingly improving the air intake effect.

[0050] In one embodiment, the side-by-side dual-motor variable-frequency generator set further includes a muffler body 500. The muffler body 500 is provided on the power main body 100 and is close to the two exhaust holes 107. When the power main body 100 operates, the first impeller rotates at a high speed, and the outside air flow will be sucked into the air duct inside the power main body 100 through the first air inlet 101. This part of the air flow will cool the components such as the cylinder head and cylinder block of the power main body 100.

[0051] The air flow after cooling the cylinder head and cylinder block of the power main body 100 will also flow towards the muffler body 500, thereby realizing the cooling of the muffler body 500. Since the muffler body 500 is close to the two exhaust holes 107, the air flow discharged from the exhaust holes 107 can further cool the muffler body 500, thereby further improving the cooling effect of the muffler body 500.

[0052] In one embodiment, the side-by-side dual-motor variable-frequency generator set further includes a housing 600. The housing 600 covers the muffler body 500. A ventilation opening 601 is provided on the side of the housing 600 away from the power main body 100, and the exhaust holes 107 communicate with the inner cavity of the housing 600. Specifically, the housing 600 is located above the two motor bodies 400, which makes the overall structure of the side-by-side dual-motor variable-frequency generator set more compact. Under the action of the housing 600, the air flow blown out from the exhaust holes 107 will flow in the gap between the housing 600 and the muffler body 500, which also improves the cooling effect of the muffler body 500.

[0053] In one embodiment, a second air inlet 602 is provided on the side of the housing 600 close to the power main body 100. A flow guide plate 700 is provided inside the housing 600. The flow guide plate 700 is used to guide the air flow discharged from the exhaust holes 107 towards the muffler body 500. The air flow after cooling the cylinder head and cylinder block of the power main body 100 will flow into the housing 600 through the second air inlet 602, thereby realizing the cooling of the muffler body 500. Therefore, through the flow guide plate 700, it is possible to prevent this air flow from interfering with the air flow discharged from the exhaust holes 107.

[0054] In one embodiment, in order to facilitate the disassembly and assembly of the first gear 201, the second gear 202, the second impeller 300 and the motor body 400, the power body 100 includes a first shell 110, a second shell 111 and a third shell 112. The first shell 110 is connected to the second shell 111 to form a first cavity 102. The third shell 112 is arranged on the side of the second shell 111 away from the first shell 110. The third shell 112 is connected to the second shell 111 to form a second cavity 103 and two exhaust holes 107. The first air inlet hole 106 is arranged on the third shell 112.

[0055] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. 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 invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A parallel dual-motor variable frequency generator set, characterized in that: include: A power body (100) comprises a first air inlet (101), a first impeller, a first cavity (102), two second cavities (103), a first output shaft (104) and two second output shafts (105); the first air inlet (101) and the first impeller are both arranged at the front side of the power body (100); the first cavity (102) and the second cavity (103) are both arranged at the rear side of the power body (100); the first cavity (102) is located between the power body (100) and the two second cavities (103); the first output shaft (104) and the second output shaft (105) are arranged in parallel, and the axes of the two second output shafts (105) are located at the same horizontal height; the first output shaft (104) and the two second output shafts (105) are both arranged in the first cavity (102), and each second output shaft (105) extends into the corresponding second cavity (103); a transmission assembly (200) disposed in the first cavity (102), the transmission assembly (200) being used to connect the first output shaft (104) with the two second output shafts (105) in a transmission manner, and to make the rotation speed of the second output shafts (105) higher than the rotation speed of the first output shaft (104); Two second impellers (300) are respectively arranged in the two second chambers (103), and the second impellers (300) are arranged on the second output shaft (105); and Two motor bodies (400) are respectively disposed in the two second cavities (103), and the motor bodies (400) are connected to the second output shaft (105).

2. The parallel dual-motor variable frequency generator set according to claim 1 is characterized in that: The transmission assembly (200) comprises a first gear (201) and two second gears (202); the first gear (201) is arranged on the first output shaft (104); each second gear (202) is arranged on a corresponding second output shaft (105); the second gear (202) is meshed with the first gear (201); and the diameter of the second gear (202) is smaller than the diameter of the first gear (201).

3. The parallel dual-motor variable frequency generator set according to claim 1 is characterized in that: The second impeller (300) is arranged between the motor body (400) and the first chamber (102), the second chamber (103) is provided with a first air inlet hole (106) and an air outlet hole (107), and the first air inlet hole (106) is arranged on a side of the motor body (400) away from the second impeller (300).

4. The parallel dual-motor variable frequency generator set according to claim 3 is characterized in that: A second air inlet (108) is provided on a side of the second chamber (103) close to the power body (100).

5. The parallel dual-motor variable frequency generator set according to claim 3 is characterized in that: An exhaust air duct (109) is formed between the second impeller (300) and the cavity wall of the second cavity (103); the exhaust air duct (109) is connected to the exhaust hole (107); and the inner wall of the exhaust air duct (109) is in a volute shape.

6. The parallel dual-motor variable frequency generator set according to any one of claims 1 to 5, characterized in that: It also includes a muffler body (500), which is arranged on the power body (100) and close to the two exhaust holes (107).

7. The parallel dual-motor variable frequency generator set according to claim 6 is characterized in that: It also includes a shell (600), the shell (600) is arranged outside the muffler body (500), and an exhaust port (601) is provided on a side of the shell (600) away from the power body (100), and the exhaust hole (107) is connected to the inner cavity of the shell (600).

8. The parallel dual-motor variable frequency generator set according to claim 7 is characterized in that: A second air inlet (602) is provided on a side of the outer shell (600) close to the power body (100), and a guide plate (700) is provided inside the outer shell (600), and the guide plate (700) is used to guide the airflow discharged from the exhaust hole (107) to the muffler body (500).

9. The parallel dual-motor variable frequency generator set according to claim 3 is characterized in that: The power body (100) comprises a first shell (110), a second shell (111) and a third shell (112); the first shell (110) and the second shell (111) are connected to form the first cavity (102); the third shell (112) is arranged on a side of the second shell (111) away from the first shell (110); the third shell (112) and the second shell (111) are connected to form the second cavity (103) and the two exhaust holes (107); the first air inlet hole (106) is arranged on the third shell (112).

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