Dual cabinet type variable frequency generator

Abstract

The utility model discloses a double -box formula frequency conversion generator of sending out, including box and in the two engines of opposite setting of box, the box is provided with frequency converter to every engine, the upper end of box is provided with the control cavity for arranging control engine work and engine output structure, the top of box is provided with the box cover through the open -close structure. Equip with frequency conversion machine for every engine, make the output power of generator can with the load condition adjust engine speed to reach the effect of energy -conserving and oil -saving, noise reduction.

Description

Technical Field

[0001] This utility model belongs to the field of silent frequency converter technology, specifically relating to a dual-generator box-type frequency converter. Background Technology

[0002] Currently, high-power engines are prone to performance instability during continuous operation, and compared to small and medium-power engines, they are more expensive and more difficult to maintain. Therefore, as a replacement for high-power engines, two small and medium-power engines are often used in parallel. In existing technology, dual-generator box-type generators use industrial frequency generators, which have poor waveform distortion. Speed ​​adjustment before operation can only be achieved mechanically or electronically. During operation, the overall output power is fixed, and it cannot be gradually adjusted when there is no load or the load decreases, resulting in waste and high noise levels. Utility Model Content

[0003] This utility model proposes a dual-generator box-type variable frequency generator, which enables the generator's output power to adjust the engine speed according to the load conditions, thereby achieving energy saving, fuel saving, and noise reduction.

[0004] Therefore, the technical solution adopted by this utility model is as follows: a dual-generator box-type variable frequency generator, including a box and two engines arranged opposite each other in the box. Each engine is provided with a frequency converter in the box. The upper end of the box is provided with a control cavity for arranging the engine operation and engine output structure. The top surface of the box is provided with a box cover through an opening and closing structure.

[0005] As a preferred embodiment of the above scheme, a fuel switching switch for switching engine fuel is provided on the right side of the control cavity, a fuel inlet for fuel access is provided on the right side of the housing corresponding to the fuel switching switch, and a switch maintenance door for easy operation is provided on the front side of the housing corresponding to the fuel switching switch.

[0006] Further preferably, each engine is equipped with an electric start structure, and a starter handle for starting the corresponding engine is provided on either the left or right side of the housing.

[0007] Further preferably, a first maintenance door is provided on the front side of the box, and a second maintenance door is provided on both the left and right sides of the box.

[0008] In a further preferred embodiment, the rear side of the lid is mounted on the box body via a hinge assembly, the opening and closing structure includes a telescopic rod, the rear end of the telescopic rod is hinged to the box body via a rear telescopic bracket, the front end of the telescopic rod is hinged to the lid via a front telescopic bracket, and a fastening assembly is provided between the front end of the lid and the box body.

[0009] Further preferably, the lid includes a lid body arranged in a frame, a waterproof cover is provided on the lid body, and the waterproof cover has water guiding slopes extending out of the lid body and inclined in all directions on its four sides, with the width of the water guiding slope on the rear side being smaller than that on the other side.

[0010] Further preferably, the left and right sides of the housing are provided with lifting rings spaced at intervals to facilitate the movement of the entire machine.

[0011] In a further preferred embodiment, the box is supported on the ground by several riser frames, and the bottom surface of the box is provided with several ventilation holes.

[0012] Further preferably, the chamber is equipped with a detection sensor for detecting the carbon monoxide concentration inside the chamber.

[0013] Further preferably, the front side of the housing is provided with a movable door for easy control and a transparent window for easy display of operation content.

[0014] The beneficial effects of this utility model are:

[0015] 1) Each engine is equipped with a frequency converter, which enables the generator output power to adjust the engine speed according to the load, thereby achieving energy saving, fuel saving and noise reduction.

[0016] 2) A control chamber is provided at the upper end of the housing, which allows for centralized control of the output of the two engines, thus facilitating operation. The housing cover is also provided through an opening and closing structure, which facilitates subsequent maintenance and replacement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present utility model. Figure 1 (Viewed from the right front side).

[0018] Figure 2 This is a schematic diagram of the present utility model. Figure 2 (Viewed from the left rear side).

[0019] Figure 3 This is a schematic diagram of the present utility model. Figure 3 (After the box lid is opened).

[0020] Figure 4 This is a schematic diagram of the box cover in this utility model.

[0021] Figure 5 This is a schematic diagram of the inverter cavity after it has been removed in this utility model. Figure 1 .

[0022] Figure 6 This is a schematic diagram of the inverter cavity after it has been removed in this utility model. Figure 2 .

[0023] Figure 7 This is a schematic diagram of the engine in this utility model. Figure 1 .

[0024] Figure 8 This is a schematic diagram of the engine in this utility model. Figure 2 .

[0025] Figure 9 This is a schematic diagram of the engine installation in this utility model.

[0026] Figure 10 This is a schematic diagram of the engine after the starter cover has been removed in this utility model.

[0027] Figure 11 This is a schematic diagram of the engine after the muffler has been removed in this utility model.

[0028] Attached reference numerals: Air inlet-01, Exhaust chamber-03, Main exhaust port-04, Auxiliary exhaust port-05, Control chamber-06, Housing-10, Switch maintenance door-11, Exhaust window-12, First maintenance door-13, Second maintenance door-14, Lifting ring-15, Mounting base-16, Elevator rack-17, Movable door-18, Transparent window-19, Engine-20, Starter cover-21, Cylinder head air guide shroud-22, Lower air guide plate of housing-23, Air guide plate of housing cover-24, Silencing air guide shroud-25, Engine housing-26, Engine Cylinder head - 27, Engine cover - 28, Muffler - 29, First exhaust fan - 31, Second exhaust fan - 32, Exhaust seal cover - 33, Exhaust air guide cover - 34, Starter handle - 35, Exhaust bend - 36, Side air guide cover of the housing - 38, Upper air guide plate of the housing - 39, Inverter - 40, Fuel switching switch - 50, Fuel interface - 51, Housing cover - 60, Telescopic rod - 61, Rear telescopic bracket - 62, Front telescopic bracket - 63, Housing cover body - 64, Waterproof cover - 65, Hinge assembly - 70, Fastening assembly - 80. Detailed Implementation

[0029] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0030] like Figure 1-11 As shown, a dual-generator box-type variable frequency generator mainly consists of a housing 10 and two generators 20 arranged lateral to lateral within the housing 10. Each generator within the housing is equipped with a frequency converter 40 capable of adjusting its output power according to the load. A cover 60 is provided on the top surface of the housing 10 via an opening and closing structure, allowing the cover to be opened as needed. A control chamber 06 is located at the upper end of the housing 10, containing control components for controlling the generator operation and output.

[0031] The specific structure of the control component is set according to the actual situation. To facilitate the operation of the control component, an active door 18 and a transparent window 19 for displaying the operation content are provided on the front side of the housing 10.

[0032] To facilitate engine starting, each engine 20 is equipped with an electric start mechanism to enable electric starting. Preferably, a starter handle 35 for starting the corresponding engine is provided on either the left or right side of the housing 10. When both engines cannot be started electrically, one engine can be started using the starter handle to charge the other engine, allowing both engines to operate.

[0033] To enable the engine to operate on different fuels, a fuel switching switch 50 is provided on the right side of the control chamber 06 for switching engine fuels. A fuel inlet 51 for fuel access is also provided on the right side of the housing 10, corresponding to the fuel switching switch 50. The fuel switching switch can be configured with separate switches for each of the two engines, or the two engines can share a single fuel switching opening. Preferably, the fuel switching switch is a three-fuel switching switch, as is currently available, capable of switching between natural gas, liquefied petroleum gas, and gasoline. The fuel inlet includes both a natural gas inlet and a fuel inlet. A maintenance door for easy operation of the fuel switching switch is provided on the front side of the housing, corresponding to the location of the fuel switching switch.

[0034] To facilitate the inspection of the two engines, the engine oil dipstick and drain plug are located on the left and right outer sides. A first maintenance door 13 is located on the front side of the housing 10, and second maintenance doors 14 are located on both the left and right sides of the housing 10. Specifically, the first maintenance door is mainly used for the maintenance and replacement of the air filter of the right engine; the second maintenance door on the left is mainly used for the maintenance and replacement of the air filter, oil addition and replacement, carburetor maintenance and replacement, and spark plug maintenance and replacement of the cylinder head of the left engine; the second maintenance door on the right is mainly used for adding and changing the oil of the right engine; and a third maintenance door is located on the bottom plate forming the control chamber to facilitate the maintenance and replacement of the carburetor and spark plug of the right engine.

[0035] The movable door, switchable maintenance door, first maintenance door, third maintenance door and two second maintenance doors have the same structure. They are all hinged to the box on one side, and a locking component is provided between the other side and the box to lock them to the box. The locking component adopts existing technology.

[0036] To enable the opening and closing of the lid, the rear side of the lid 60 is mounted on the box body 10 via a hinge assembly 70. The opening and closing structure includes a telescopic rod 61, the rear end of which is hinged to the box body 10 via a rear telescopic bracket 62, and the front end of which is hinged to the lid 60 via a front telescopic bracket 63. To prevent the lid from opening arbitrarily, a fastening assembly 80 is provided between the front end of the lid 60 and the box body. Both the hinge assembly and the fastening assembly utilize existing technology.

[0037] The cover 60 includes a cover body 64 arranged in a frame, and a waterproof cover 65 is provided on the cover body 64. Water-guiding slopes extending outwards and sloping in the direction of inclination are provided on all four sides of the waterproof cover 65. The width of the water-guiding slope on the rear side is smaller than that on the other sides, facilitating the opening of the cover. To further ensure overall waterproofing, waterproof covers are provided in front of the air vents on the front, rear, left, and right sides of the cover, ensuring that the outer side is below and the inner side is outside when air is entering or exiting. The cable routing holes for the power supply are all designed as outwardly downward sloping holes.

[0038] Ideally, lifting rings 15, spaced apart at intervals, should be provided on both the left and right sides of the housing 10 to facilitate the movement of the entire machine. The housing 10 is supported on the ground by several riser brackets 17, which are located at the four corners of the housing. Several ventilation holes are provided on the bottom surface of the housing 10 to further dissipate heat. The riser brackets also serve to elevate the engine and prevent water ingress. Ideally, mounting brackets 16 should also be provided on the riser brackets to facilitate the user's securing of the engine. A carbon monoxide detection sensor should be installed inside the housing 10 to monitor the carbon monoxide concentration within the housing.

[0039] To achieve cooling of the entire generator, two air inlets 01 are spaced apart on the front side of the housing 10 to allow air to enter the corresponding engines. Exhaust windows 12 for each engine are located on both sides of the housing 10. An exhaust chamber 03 is located inside the housing 10 at the position corresponding to each exhaust window 12. An exhaust through-hole communicating with the engine exhaust is provided on the front wall of the exhaust chamber. The muffler outlet of the engine 20 extends into the exhaust chamber 03 through an exhaust bend 36 passing through the exhaust through-hole. A cooling structure is provided outside the engine 20, and the outlet of the cooling structure is connected to the exhaust chamber 03. Preferably, the inverter is positioned between the air inlets and the engine cooling structure to ensure adequate cooling for the inverter. A variable frequency drive (VFD) is also provided between the VFD and the cooling structure to ensure that most of the cooling airflow enters the cooling structure.

[0040] Air enters through the air inlet and flows into the cooling structure to cool the engine. After cooling the engine, the cooled air enters the exhaust chamber and is discharged through the exhaust window. After combustion, the exhaust gases are discharged from the muffler outlet, then through the exhaust bend into the exhaust chamber, and finally discharged through the exhaust window. This process achieves engine cooling. Each engine has its own independent cooling channel, which effectively ensures engine cooling.

[0041] To facilitate the discharge of gas from the exhaust chamber, an exhaust hood 34 is provided within the exhaust chamber 03 to guide the exhaust gas from its front-to-back extension direction to the exhaust window. Preferably, the distance between the rear side of the exhaust hood 34 and the front inner wall of the exhaust chamber gradually increases from the exhaust through-hole side until it remains constant. A rounded transition is used between the side of the exhaust hood opposite the exhaust window and the rear side of the exhaust hood 34, and flanges are provided at the front ends of both the upper and lower sides of the exhaust hood to facilitate its installation.

[0042] To facilitate heat exchange within the housing, an exhaust structure is provided on the housing 10. The exhaust structure includes a main exhaust port 04 on the rear side of the housing 10 for exhausting heat from within the housing, and a first exhaust fan 31 mounted on the main exhaust port 04. Simultaneously, auxiliary exhaust ports 05 are provided on the left and right sides of the housing 10 for assisting in exhausting heat from within the housing, and a second exhaust fan 32 is mounted on each of the auxiliary exhaust ports 05. The first exhaust fan operates when either engine is running, while the second exhaust fan only operates when the corresponding engine is running.

[0043] To ensure cooling of each engine, the cooling structure includes a starter shroud 21, a cylinder head air guide shroud 22, a lower air guide plate 23, a side air guide shroud 38, an upper air guide plate 39, a cover air guide plate 24, and a muffler air guide shroud 25. The starter shroud 21 is installed on the front of the engine housing 26, the lower air guide plate 23 is installed at the bottom of the engine housing 26, the cylinder head air guide shroud 22 is installed on the engine cylinder head 27, the cover air guide plate 24 is installed on the rear of the engine housing cover 28, the muffler air guide shroud 25 is installed on the cover air guide plate 24, and the muffler 29 is located inside the muffler air guide shroud 25. The side air guide shroud 38 covers the starter motor installed on the side of the housing, and the upper air guide plate 39 is located within the housing. On the upper side of the body, a first through hole is provided on the side of the cover air guide plate 24 for connecting the cylinder head air guide shroud 22 and the muffler air guide shroud 25. A second through hole is provided at the lower end of the cover air guide plate 24 for connecting the lower end of the engine housing 26 and the muffler air guide shroud 25. A crankshaft through hole is provided in the middle of the cover air guide plate 24. An exhaust sealing cover 33 is provided between the rear side of the muffler air guide shroud 25 and the exhaust port to prevent the cooling air from escaping. A third through hole is provided on the air guide plate on the upper side of the housing.

[0044] The cooling air enters the engine through the starter shroud and is divided into four channels: The first channel enters the cylinder head from the side of the starter shroud closest to the cylinder head, cooling the cylinder head between it and the cylinder head air guide shroud. After cooling, the air enters the muffler air guide shroud through the first through-hole. The second channel enters the lower air passage at the bottom of the engine housing from the bottom of the engine housing between the bottom of the engine housing and the lower air guide plate, cooling the lower part of the engine housing. The cooled air enters the muffler air guide shroud through the second through-hole. The third channel enters the starter motor from the location where it is installed in the engine housing, cooling the starter motor and the side air guide shroud of the engine housing between it and the side air guide shroud. The cooled air enters the muffler air guide shroud through the crankshaft through-hole. The fourth channel enters the upper air passage at the top of the engine housing from the top of the engine housing between the upper air guide plate of the housing, cooling the upper part of the engine housing. After cooling, the air enters the housing through the third through-hole and is then discharged through the exhaust fan.

[0045] The cooling air entering the muffler shroud through the first, second, and third channels, along with the exhaust gas from the muffler, enters the exhaust chamber through the exhaust vents. The presence of this cooling air also effectively prevents exhaust gas from accumulating within the muffler shroud. Because the heat generation at the top of the enclosure is relatively low, the temperature of the cooling air entering the enclosure is not very high, and after being exhausted by the exhaust fan, it effectively dissipates heat from the inside of the enclosure.

[0046] To further achieve overall sound absorption and heat insulation, sound-absorbing cotton and corrugated cotton are installed on the front, back, left, and right sides of the inner side of the enclosure. The corrugated cotton is in contact with the enclosure. Corrugated cotton is also installed on the inner bottom surface of the enclosure. A heat insulation layer and fiberglass cotton are installed on the side of the exhaust chamber that is in contact with the exhaust. A heat insulation layer and corrugated cotton are installed on the side of the exhaust located inside the enclosure. The heat insulation layer is made of tin foil.

Claims

1. A dual-generator box-type variable frequency generator, comprising a housing (10) and two generators (20) arranged opposite each other on the left and right sides within the housing (10), characterized in that: Each engine is equipped with a frequency converter (40) inside the housing (10). The upper end of the housing (10) is provided with a control cavity (06) for arranging the engine operation and engine output structure. The top surface of the housing (10) is provided with a cover (60) through an opening and closing structure.

2. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: The right side of the control chamber (06) is provided with a fuel switching switch (50) for switching engine fuel. The right side of the housing (10) is provided with a fuel inlet (51) for fuel access corresponding to the fuel switching switch (50). The front side of the housing is provided with a switch maintenance door (11) for easy operation corresponding to the fuel switching switch.

3. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: Each engine (20) is equipped with an electric start structure, and the housing (10) is equipped with a start handle (35) on either the left or right side for starting the corresponding engine.

4. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: A first maintenance door (13) is provided on the front side of the box (10), and a second maintenance door (14) is provided on both the left and right sides of the box (10).

5. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: The rear side of the lid (60) is mounted on the box body (10) via a hinge assembly (70). The opening and closing structure includes a telescopic rod (61). The rear end of the telescopic rod (61) is hinged to the box body (10) via a rear telescopic bracket (62). The front end of the telescopic rod (61) is hinged to the lid (60) via a front telescopic bracket (63). A fastening assembly (80) is provided between the front end of the lid (60) and the box body.

6. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: The box cover (60) includes a box cover body (64) arranged in a frame. A waterproof cover (65) is provided on the box cover body (64), and the four sides of the waterproof cover (65) are provided with water guiding slopes that extend outside the box cover body and are inclined in the direction of inclination. The width of the water guiding slope on the rear side is smaller than that on the other side.

7. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: The left and right sides of the housing (10) are provided with lifting rings (15) spaced at intervals to facilitate the movement of the whole machine.

8. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: The box (10) is supported on the ground by several heightening frames (17), and the bottom surface of the box (10) is provided with several ventilation holes.

9. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: The box (10) is equipped with a detection sensor for detecting the concentration of carbon monoxide inside the box.

10. The dual-generator box-type variable frequency generator according to claim 1, characterized in that: The front side of the housing (10) is provided with an active door (18) for easy control and a transparent window (19) for easy display of operation content.

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