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

Abstract

The utility model 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 utility model relates to the technical field of generator set, concretely relates to a parallel type double motor variable frequency generator set. BACKGROUND

[0002] The existing variable frequency generator set usually adopts single impeller and single generator structure, the variable frequency generator set of this structure generally installs impeller and generator on the front side of the engine, drives the impeller high-speed rotation through the crankshaft of the engine, and thus absorbs the airflow into the air scoop to cool the generator, cylinder body, cylinder head and the like. Since the engine generates more heat, most of the airflow absorbed 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 the airflow is used to cool the generator, and thus the cooling effect of the generator is poor and the cooling efficiency is low.

[0003] Meanwhile, the generator of the large displacement and high power variable frequency generator set is usually large in size and heavy in weight, the oversized generator can affect the layout of the whole machine, and can also affect the cost, weight, heat dissipation, strength and many other factors of the whole machine. SUMMARY

[0004] In view of the defects in the prior art, the utility model aims at providing a parallel type double motor variable frequency generator set, which is more compact in structure, reduces the volume, weight and cost of the same displacement model, and can also effectively cool the motor body.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a parallel type double motor variable frequency generator set, which comprises a power main body, 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, and 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 located at the same horizontal height, the first output shaft and the two second output shafts are both 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 for drivingly connecting the first output shaft and the two second output shafts, and making the rotating speed of the second output shaft higher than that of the first output shaft; two second impellers are respectively arranged in the two second cavities, and the second impellers are arranged on the second output shafts; and two motor bodies are respectively arranged in the two second cavities, and the motor bodies are connected with the second output shafts.

[0007] Preferably, the transmission assembly comprises a first gear wheel and two second gear wheels, the first gear wheel is arranged on the first output shaft, each second gear wheel is arranged on a corresponding second output shaft, the second gear wheel is engaged with the first gear wheel, and the diameter of the second gear wheel is smaller than that of the first gear wheel.

[0008] Preferably, the second impeller is arranged between the motor body and the first cavity, the second cavity is provided with a first air inlet and an air outlet, and the first air inlet is arranged on the side of the motor body away from the second impeller.

[0009] Preferably, the second cavity is provided with a second air inlet on the side close to the power body.

[0010] Preferably, an air outlet air duct is formed between the second impeller and the cavity wall of the second cavity, the air outlet air duct is communicated with the air outlet, and the inner wall of the air outlet air duct is in the shape of a volute.

[0011] Preferably, a silencer body is further arranged on the power body and close to the two air outlets.

[0012] Preferably, an outer shell is further arranged outside the silencer body, the outer shell is provided with an air outlet on the side away from the power body, and the air outlet is communicated with the inner cavity of the outer shell.

[0013] Preferably, the outer shell is provided with a second air inlet on the side close to the power body, and a flow guide plate is arranged in the outer shell and used for guiding the airflow discharged from the air outlet to the silencer body.

[0014] Preferably, the power body comprises a first shell, a second shell and a third shell, the first shell and the second shell are connected to form the first cavity, the third shell is arranged on the side of the second shell away from the first shell, the third shell and the second shell are connected to form the second cavity and the two air outlets, and the first air inlet is arranged on the third shell.

[0015] The utility model discloses the beneficial effects of the following:

[0016] The parallel double-motor variable-frequency generator set disclosed by the utility model has smaller motor body size, more compact machine structure, and can greatly reduce the volume, weight and cost of the same displacement model.

[0017] Since the transmission assembly can increase the rotating speed of the two second output shafts, high rotating speed output of the second output shafts can be realized without changing the rotating speed of the first output shaft, so that the abrasion of the moving parts inside the power main box is reduced, the fuel consumption of the whole machine is lowered, and the service life of the whole machine is prolonged.

[0018] Moreover, since a set of second impellers and motor bodies are installed in each second cavity, the second impellers and motor bodies in the two second cavities can independently operate, which can ensure the normal operation of the motor bodies and effectively cool the motor bodies. Since the second impellers and motor bodies are arranged at the rear side of the power main body, the cooling process of the two motor bodies is independent of the cooling process of the power main body, which greatly improves the heat dissipation and cooling effect of the two motor bodies. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the description of the embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0020] Figure 1 A structure schematic view of the side-by-side double-motor variable-frequency generator set according to an embodiment of the present application is shown in the figure.

[0021] Figure 2 A structure schematic view of the cooperation of the first shell, the second shell and the third shell is shown in the figure.

[0022] Figure 3 A structure schematic view of the transmission assembly is shown in the figure.

[0023] Figure 4 A structure schematic view of the cooperation of the second shell and the third shell is shown in the figure.

[0024] Figure 5 An exploded schematic view of the second shell, the second impeller, the motor body and the third shell is shown in the figure.

[0025] Figure 6 A cross-sectional schematic view of the first cavity and the second cavity is shown in the figure.

[0026] Figure 7 A structure schematic view of the muffler body and the shell is shown in the figure. Figure 4 A structure schematic view of the muffler body and the shell is shown in the figure.

[0027] Figure 8 A structure schematic view of the muffler body and the shell is shown in the figure.

[0028] Figure 9 Fig. 1 is a structural schematic diagram of the air conditioner in a state of another perspective view; Figure 8 Fig. 2 is a structural schematic diagram of the air conditioner in a state of another perspective view;

[0029] Figure 10 Fig. 3 is a structural schematic diagram of the air conditioner in a state of another perspective view;

[0030] Reference signs:

[0031] 100, power body; 101, first air inlet; 102, first cavity; 103, second cavity; 104, first output shaft; 105, second output shaft; 106, first air inlet hole; 107, air outlet hole; 108, second air inlet hole; 109, air outlet duct; 110, first shell; 111, second shell; 112, third shell; 200, transmission assembly; 201, first gear; 202, second gear; 300, second impeller; 400, motor body; 500, muffler body; 600, shell; 601, air outlet; 602, second air inlet; 700, deflector. DETAILED DESCRIPTION

[0032] 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, and therefore only serve as examples, and cannot limit the protection scope of the utility model.

[0033] 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 meaning understood by the technical personnel in the field to which the utility model belongs.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by 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" and the like are based on the orientation or positional relationship 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] like Figures 1-10 As shown, in one embodiment of this utility model, a parallel dual-motor variable frequency generator set is provided, including a power body 100, a transmission assembly 200, two second impellers 300, and two motor bodies 400. The power 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 located on the front side of the power body 100, and the first cavity 102 and the second cavities 103 are both located on the rear side of the power body 100, with the first cavity 102 situated between the power body 100 and the two second cavities 103. The first output shaft 104 and the second output shafts 105 are arranged parallel to each other, 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 all located within the first cavity 102, and each second output shaft 105 extends into its corresponding second cavity 103.

[0039] A transmission assembly 200 is disposed within the first cavity 102. The transmission assembly 200 is used to drive the first output shaft 104 to two second output shafts 105, and to ensure that the rotational speed of the second output shafts 105 is higher than that of the first output shaft 104. Two second impellers 300 are respectively disposed within two second cavities 103, and are mounted on the second output shafts 105. Two motor bodies 400 are respectively disposed within 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 body 100 is running, the first impeller rotates at high speed, which will suck the airflow outside through the first air inlet 101 into the air duct inside the power body 100, and this part of the airflow will cool the cylinder head, cylinder and other parts of the power body 100.

[0041] At the same time, the transmission assembly 200 will transmit the power of the first output shaft 104 to the two second output shafts 105, and the speed of the second output shaft 105 is increased, and the two second output shafts 105 will drive the corresponding second impeller 300 and the rotor of the motor body 400 to rotate at high speed. The second impeller 300 will suck the airflow outside through the first air inlet 106 into the accommodating cavity, so as to cool the stator of the motor body 400, and the cooled airflow will be discharged outside the accommodating cavity through the air outlet 107.

[0042] The parallel double-motor variable frequency generator set disclosed in the embodiment has two motor bodies 400 arranged in parallel at the rear side of the power body 100. Compared with the conventional single-motor generator set, the size of the motor body 400 of the parallel double-motor variable frequency generator set is smaller, the overall structure is more compact, and the volume, weight and cost of the same displacement model can be greatly reduced.

[0043] Since the transmission assembly 200 can increase the speed of the two second output shafts 105, high-speed output of the second output shaft 105 can be realized without changing the speed of the first output shaft 104, which reduces the wear of the moving parts inside the power body 100, reduces the fuel consumption of the whole machine, and prolongs the service life of the whole machine. At the same time, the high-speed output of the second output shaft 105 also drives the rotor of the motor body 400 to rotate at high speed, thereby improving the power generation conversion efficiency and further saving energy efficiency and cost.

[0044] Moreover, since each second cavity 103 is provided with a set of second impellers 300 and motor bodies 400, the second impellers 300 and motor bodies 400 in the two second cavities 103 will operate independently, which can ensure the normal operation of the motor body 400 and also realize effective cooling of the motor body 400. Since the second impellers 300 and motor bodies 400 are arranged at the rear side of the power body 100, the cooling process of the two motor bodies 400 is independent of the cooling process of the power body 100, which greatly improves the cooling and cooling effect of the two motor bodies 400.

[0045] In one embodiment, 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 engaged with the first gear 201, and the diameter of the second gear 202 is smaller than that 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 that of the first gear 201, the purpose of speed increasing of the second gear 202 can be achieved, so that the high speed output of the second output shaft 105 can also be achieved without changing the speed of the first output shaft 104.

[0046] In one embodiment, the second impeller 300 is arranged between the motor body 400 and the first cavity 102, the second cavity 103 is provided with the first air inlet hole 106 and the air outlet hole 107, and the first air inlet hole 106 is arranged on the 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 hole 106, and the airflow will cool the stator of the motor body 400, and the cooled airflow will be discharged out of the second cavity 103 through the air outlet hole 107. Since the motor body 400 is located between the second impeller 300 and the first air inlet hole 106, the cooling airflow will continuously cool the stator of the motor body 400 during the process of flowing from the first air inlet hole 106 to the air outlet hole 107, therefore, the position design of the second impeller 300, the motor body 400, the first air inlet hole 106 and the air outlet hole 107 improves the cooling effect of the motor body 400, so that the motor body 400 can operate in a normal working condition.

[0048] In one embodiment, the second cavity 103 is provided with a second air inlet hole 108 close to the power body 100. During the operation of the second impeller 300, the external airflow will also be sucked into the second cavity 103 through the second air inlet hole 108, thereby improving the air inlet effect. Since the second air inlet hole 108 is close to the power body 100, the airflow will also carry away part of the heat of the power body 100, thereby improving the cooling effect of the power body 100.

[0049] In one embodiment, the second impeller 300 and the cavity wall of the second cavity 103 form an exhaust air duct 109, which is in communication with the exhaust air hole 107, and the inner wall of the exhaust air duct 109 is in the shape of a volute. The structure of the exhaust air duct 109 is designed so that the second impeller 300 can reduce the disturbance of the airflow and noise during operation, and ensure that the airflow does not deviate during the process of flowing to the exhaust air hole 107, thereby improving the exhaust effect, and accordingly improving the air intake effect.

[0050] In one embodiment, the side-by-side double-motor variable-frequency generator set further comprises a muffler body 500 arranged on the power body 100 and close to the two exhaust air holes 107. When the power body 100 is running, the first impeller rotates at high speed, which can suck the airflow from the outside into the air duct inside the power body 100 through the first air inlet 101, and this part of the airflow can cool the cylinder head, cylinder body and other parts of the power body 100.

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

[0052] In one embodiment, the side-by-side double-motor variable-frequency generator set further comprises an outer shell 600 arranged outside the muffler body 500, and the side of the outer shell 600 away from the power body 100 is provided with an exhaust air hole 601, and the exhaust air hole 107 is in communication with the inner cavity of the outer shell 600. Specifically, the outer shell 600 is located above the two motor bodies 400, which makes the overall structure of the side-by-side double-motor variable-frequency generator set more compact. Under the action of the outer shell 600, the airflow blown out from the exhaust air hole 107 can flow in the gap between the outer shell 600 and the muffler body 500, which improves the cooling effect of the muffler body 500.

[0053] In one embodiment, the side of the outer shell 600 close to the power body 100 is provided with a second air inlet 602, and the outer shell 600 is provided with a flow guide plate 700 for guiding the airflow discharged from the exhaust air hole 107 to the muffler body 500. The airflow cooled by the cylinder head and cylinder body of the power body 100 can flow into the outer shell 600 through the second air inlet 602, thereby cooling the muffler body 500. Therefore, by means of the flow guide plate 700, the airflow can be prevented from interfering with the airflow discharged from the exhaust air hole 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, etc., the power body 100 comprises a first shell 110, a second shell 111 and a third shell 112, the first shell 110 is connected with the second shell 111 to form the 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 with the second shell 111 to form the second cavity 103 and two exhaust holes 107, and the first air inlet hole 106 is arranged on the third shell 112.

[0055] In the description 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 in order not to obscure the understanding of the present description.

[0056] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit it; although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the utility model, and they should be covered in the scope of the claims and the description of the utility model.

Claims

1. A parallel dual-motor variable frequency generator set, characterized in that, include: The power unit (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 located on the front side of the power unit (100), and the first cavity (102) and the second cavities (103) are both located on the rear side of the power unit (100). The first cavity (102) is located between the power unit (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 located in the first cavity (102), and each second output shaft (105) extends into the corresponding second cavity (103). A transmission assembly (200) is disposed in the first cavity (102). The transmission assembly (200) is used to drive the first output shaft (104) to two second output shafts (105) and to make the rotational speed of the second output shafts (105) higher than that of the first output shaft (104). Two second impellers (300) are respectively disposed in two second cavities (103), and the second impellers (300) are disposed on the second output shaft (105); and Two motor bodies (400) are respectively disposed in 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, characterized in that, The transmission assembly (200) includes a first gear (201) and two second gears (202). The first gear (201) is mounted on the first output shaft (104), and each second gear (202) is mounted on a corresponding second output shaft (105). The second gear (202) meshes 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, characterized in that, The second impeller (300) is located 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). The first air inlet (106) is located on the 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, characterized in that, The second cavity (103) has a second air inlet (108) on the side near the power body (100).

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

6. The parallel dual-motor variable frequency generator set according to any one of claims 3-5, characterized in that, It also includes a muffler body (500), which is disposed on the power unit (100) and close to the two exhaust ports (107).

7. The parallel dual-motor variable frequency generator set according to claim 6, characterized in that, It also includes a housing (600), which covers the muffler body (500). The housing (600) has an exhaust port (601) on the side away from the power unit (100), and the exhaust port (107) communicates with the inner cavity of the housing (600).

8. The parallel dual-motor variable frequency generator set according to claim 7, characterized in that, The outer casing (600) has a second air inlet (602) on the side near the power unit (100), and a guide plate (700) is provided inside the outer casing (600). 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, characterized in that, The power unit (100) includes a first housing (110), a second housing (111) and a third housing (112). The first housing (110) is connected to the second housing (111) to form the first cavity (102). The third housing (112) is located on the side of the second housing (111) away from the first housing (110). The third housing (112) is connected to the second housing (111) to form the second cavity (103) and two exhaust holes (107). The first air inlet (106) is located on the third housing (112).

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