An integrated cooling series - extended - range generator system

Abstract

An integrated series range-extending generator system includes an interconnected engine and a generator, the generator including a housing, a stator, and a rotor, the stator being mounted on the housing, the rotor being disposed within the housing relative to the stator, wherein the housing further comprises a mechanical oil pump, a flywheel, a torsional vibration damper, and a planetary gear reduction mechanism, the mechanical oil pump being mounted on the engine and connected to the engine's crankshaft, the flywheel being mounted near the output end of the crankshaft, the torsional vibration damper being mounted on the flywheel and connected to the planetary gear reduction mechanism, and the planetary gear reduction mechanism being mounted on the housing and connected to the rotor shaft of the generator. The present invention has a compact structure, high transmission efficiency, light weight, low cost, and is easy to repair and maintain. It also improves the heat dissipation capacity of the generator and the planetary gear reduction mechanism, thereby enhancing the overall performance of the generator system.

Description

Technical Field

[0001] The present invention relates to a generator, in particular to an integrated cooling series range-extending generator system. Background Art

[0002] The series range-extended generator system is a system in which the engine first drives the generator to generate electricity, and then transmits the electricity to the power battery for storage, or directly transmits it to the system that drives the generator to drive the entire vehicle; its advantage is that it can achieve optimal control of the engine, and the engine can operate stably in the optimal working range for a long time, thereby extending the service life of the engine; the existing series range-extended generator system usually adopts a direct connection between the generator and the engine, and the generator is cooled by a traditional liquid-cooled shell. The assembly has poor heat dissipation capacity, the overall design size is large, the cost is high, and it is not conducive to the chassis space layout of the entire vehicle. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an integrated cooling series range-extending generator system in response to the above-mentioned defects of the prior art.

[0004] In order to achieve the above-mentioned objectives, the present invention provides an integrated series range extender generator system, comprising an engine and a generator connected to each other, the generator comprising a housing, a stator and a rotor, the stator being mounted on the housing, and the rotor being arranged in the housing relative to the stator, wherein a mechanical oil pump, a flywheel, a torsional vibration damper and a planetary gear reduction mechanism are also arranged in the housing, the mechanical oil pump being mounted on the engine and connected to the crankshaft of the engine, the flywheel being mounted on the output end of the crankshaft near the mechanical oil pump, the torsional vibration damper being mounted on the flywheel and connected to the planetary gear reduction mechanism, and the planetary gear reduction mechanism being mounted on the housing and connected to the rotor shaft of the generator.

[0005] The above-mentioned integrated series range extender generator system further includes a lubricating oil filter, a lubricating oil circuit is provided on the housing, and the lubricating oil circuit is respectively provided with oil outlets corresponding to the flywheel, the planetary gear reduction mechanism and the rotor. The oil inlet line of the lubricating oil filter is connected to the mechanical oil pump, and the oil outlet line of the lubricating oil filter is connected to the lubricating oil circuit.

[0006] In the above-mentioned integrated series range extender generator system, the lubricating oil filter is arranged outside the housing.

[0007] In the above-mentioned integrated series range extender generator system, the mechanical oil pump includes a pump body and a driving gear and a transmission gear mounted on the pump body, and the driving gear and the transmission gear are meshed.

[0008] In the above-mentioned integrated series range extender generator system, the crankshaft output end gear of the engine is meshed with the driving gear for transmission.

[0009] In the above-mentioned integrated series range extender generator system, the torsional vibration damper is connected to the planetary carrier input shaft of the planetary gear reduction mechanism through a spline.

[0010] The above-mentioned integrated series range extender generator system, wherein the planetary gear reduction mechanism includes a planetary carrier, a sun gear, planetary gears and a fixed locking outer ring gear, the planetary gears are mounted on the planetary carrier and respectively engage with the sun gear and the fixed locking outer ring gear, the fixed locking outer ring gear is mounted on the housing, and the sun gear is connected to the rotor shaft of the generator.

[0011] In the above-mentioned integrated series range extender generator system, the fixed locking outer ring gear is fixedly locked with the housing.

[0012] In the above-mentioned integrated series range extender generator system, the sun gear is connected to the rotor shaft of the generator via a spline.

[0013] In the above-mentioned integrated series range extender generator system, the generator is a high-speed generator.

[0014] The technical effects of the present invention are:

[0015] This invention boasts a compact structure, high transmission efficiency, lightweight, low cost, and easy repair and maintenance. It integrates the engine, torsional vibration damper, planetary gear reduction mechanism, and generator, allowing the use of high-speed, high-power motors. This reduces size, lowers cost, and improves space utilization for the assembly system, facilitating its deployment in series-range extended-range vehicles. Furthermore, a mechanical oil pump provides forced lubrication for the planetary gear reduction mechanism, motor stator, and rotor, enhancing heat dissipation from the motor and planetary gear reduction mechanism, and improving overall assembly performance.

[0016] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of an embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a mechanical oil pump according to an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the connection between a mechanical oil pump and an engine crankshaft according to an embodiment of the present invention.

[0020] Among them, the reference numerals

[0021] 1 engine

[0022] 11 Crankshaft

[0023] 2 generators

[0024] 21 housing

[0025] 22 stator

[0026] 23 rotor

[0027] 24 Lubrication oil circuit

[0028] 25 oil outlet

[0029] 3 Mechanical oil pump

[0030] 31 Pump body

[0031] 32 driving gear

[0032] 33 transmission gear

[0033] 4 Flywheel

[0034] 5 Torsional vibration damper

[0035] 6 Lubricating oil filter

[0036] 61 Oil inlet line

[0037] 62 oil outlet pipeline

[0038] 7 Planetary gear reduction mechanism

[0039] 71 planet carrier

[0040] 72 planetary gears

[0041] 73 Sun gear

[0042] 74 Fixed locking outer ring gear DETAILED DESCRIPTION

[0043] The structural principle and working principle of the present invention are described in detail below with reference to the accompanying drawings:

[0044] See also Figure 1 , Figure 1The figure is a schematic structural diagram of an embodiment of the present invention. The integrated series range extender generator system of the present invention includes an interconnected engine 1 and a generator 2. The generator 2 is preferably a high-speed generator. The generator 2 includes a housing 21, a stator 22, and a rotor 23. The stator 22 is mounted on the housing 21, and the rotor 23 is disposed within the housing 21 relative to the stator 22. The housing 21 also contains a mechanical oil pump 3, a flywheel 4, a torsional vibration damper 5, and a planetary gear reduction mechanism 7. The mechanical oil pump 3 is bolted to the engine 1 and connected to the crankshaft 11 of the engine 1. The flywheel 4 is mounted near the output end of the crankshaft 11. The torsional vibration damper 5 is mounted on the flywheel 4 and connected to the planetary gear reduction mechanism 7. The planetary gear reduction mechanism 7 is mounted on the housing 21 and axially connected to the rotor 23 of the generator 2. The torsional vibration damper 5 is preferably splined to the input shaft of the planetary carrier 71 of the planetary gear reduction mechanism 7.

[0045] This embodiment also includes a lubricating oil filter 6. A lubricating oil circuit 24 is provided on the housing 21. The lubricating oil circuit 24 has oil outlets 25 corresponding to the flywheel 4, the planetary gear reduction mechanism 7, and the rotor 23. The oil inlet line 61 of the lubricating oil filter 6 is connected to the mechanical oil pump 3, and the oil outlet line 62 of the lubricating oil filter 6 is connected to the lubricating oil circuit 24. The lubricating oil filter 6 is disposed outside the housing 21. This embodiment, by using an external lubricating oil filter 6, can reduce impurities in the lubricating oil, improve the cleanliness and lubricating effect of the lubricating oil, enhance product reliability, and reduce subsequent maintenance costs.

[0046] See also Figure 2 and Figure 3 , Figure 2 This is a structural diagram of a mechanical oil pump 3 according to an embodiment of the present invention. Figure 3This is a schematic diagram of the connection between the mechanical oil pump 3 and the engine crankshaft 11 according to an embodiment of the present invention. The mechanical oil pump 3 of this embodiment includes a pump body 31 and a driving gear 32 and a transmission gear 33 mounted on the pump body 31, and the driving gear 32 and the transmission gear 33 are meshed. The output end gear of the crankshaft 11 of the engine 1 is connected to the driving gear 32 and meshes with each other for transmission. In this embodiment, the mechanical oil pump 3 is driven by the gear of the crankshaft 11 of the engine 1 to pressurize the pump oil. The pressurized lubricating oil passes through the lubricating oil filter 6 and the lubricating oil path 24 of the housing 21 of the generator 2 to the oil outlet 25, and is sprayed onto the planetary gear reduction mechanism 7 to lubricate and cool the planetary gear reduction mechanism 7. This can reduce the oil stirring loss of the planetary gear reduction mechanism 7 under high-speed operation and improve the efficiency of the transmission system. At the same time, the pressurized lubricating oil passes through the lubricating oil filter 6 and the lubricating oil passage 24 to the oil outlet 25, and is sprayed onto the stator 22 and the rotor 23 of the generator 2, thereby lubricating and cooling the stator 22 and the rotor 23 of the generator 2, thereby improving the heat dissipation capacity of the generator 2 and the lubrication environment of the bearings of the generator 2.

[0047] In this embodiment, the planetary gear reduction mechanism 7 includes a planet carrier 71, a sun gear 73, planetary gears 72, and a fixed locking outer ring gear 74. The planetary gears 72 are mounted on the planet carrier 71 and mesh with the sun gear 73 and the fixed locking outer ring gear 74, respectively. The fixed locking outer ring gear 74 is mounted on the housing 21, and the sun gear 73 is connected to the rotor shaft of the generator 2. The fixed locking outer ring gear 74 is fixedly locked to the housing 21. The sun gear 73 is splined to the rotor shaft 23 of the generator 2. That is, in this embodiment, the crankshaft 11 of the engine 1 is connected to the flywheel 4 and the torsional vibration damper 5, the torsional vibration damper 5 is connected to the planetary carrier 71 of the planetary gear reduction mechanism 7, the planetary carrier 71 is connected to the sun gear 73, and is fixedly locked by a fixed locking outer ring gear 74, and the sun gear 73 is connected to the rotor 23 shaft, so that a deceleration effect is formed between the rotor 23 of the generator 2 and the crankshaft 11 of the engine 1. The generator 2 can adopt a high-speed generator 2, which reduces the cost and total weight of the generator 2, reduces the volume of the single machine, and improves the power density of the generator 2, which is conducive to achieving the goal of lightweighting the automobile and reducing the procurement cost of automobile parts.

[0048] The present invention connects the output end of the engine 1's crankshaft 11 to the gear train of a mechanical oil pump 3, pressurizing the lubricating oil. After passing through the lubricating oil filter 6, the pressurized lubricating oil enters the lubricating oil passage 24 within the housing 21. Through the oil outlet 25, it cools and lubricates the torsional vibration damper 5, the planetary gear reduction mechanism 7, and the stator 22 and rotor 23 of the generator 2. The engine 1 operates at a minimum speed, driving the gear train of the mechanical oil pump 3 to ensure the minimum oil pressure required for system lubrication and cooling. The mechanical oil pump 3, with the engine 1's transmission gears on the crankshaft 11 meshing with the gears of the mechanical oil pump 3, ensures the reliability of the lubricating oil supply system. The torsional vibration damper 5 is mounted on the flywheel 4 of the engine 1 and connected to the input shaft of the planetary carrier 71 of the planetary gear reduction mechanism 7 via an internal spline, ensuring the smoothness and reliability of the transmission mechanism.

[0049] The present invention integrates an engine 1, a torsional vibration damper 5, a planetary gear reduction mechanism 7, and a generator 2. The output end of the engine 1 is connected to the planetary carrier 71 of the planetary gear reduction mechanism 7 through the torsional vibration damper 5 and mechanically locked by a fixed locking outer ring gear 74. The generator 2 is connected to the sun gear 73 of the planetary gear reduction mechanism 7. A mechanical oil pump 3 is mounted on the engine 1 and driven by the gear set at the output end of the engine 1. It provides lubrication to the planetary gear reduction mechanism 7, motor bearings, oil seals, etc., and cooling to the planetary gear reduction mechanism 7 and the stator 22 and rotor 23 of the generator 2 during operation of the engine 1 and generator 2 system. The generator 2 can use a high-speed, high-power motor, which reduces size, lowers cost, and improves space utilization of the assembly system, making it easier to install on a series range extender system. The mechanical oil pump 3 provides forced lubrication of the planetary gear reduction mechanism 7, stator 22, and rotor 23, improving the heat dissipation capacity of the motor and planetary gear reduction mechanism 7, and enhancing the overall performance of the assembly system.

[0050] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An integrated series range extender generator system, comprising an engine and a generator connected to each other, wherein the generator comprises a housing, a stator, and a rotor, wherein the stator is mounted on the housing, and the rotor is disposed within the housing relative to the stator, characterized in that: The housing is also provided with a mechanical oil pump, a flywheel, a torsional vibration damper and a planetary gear reduction mechanism. The engine, torsional vibration damper, planetary gear reduction mechanism and the generator are integrated into one. The output end of the engine is connected to the planetary carrier of the planetary gear reduction mechanism through the torsional vibration damper and is mechanically locked by a fixed locking outer ring gear. The generator is connected to the sun gear of the planetary gear reduction mechanism; the mechanical oil pump is installed on the engine and connected to the crankshaft of the engine, and is driven by the output end gear set of the engine, and is used to supply oil to the planetary gear reduction mechanism, the planetary gear reduction mechanism and the generator when the engine and the generator are working. The motor bearings, oil seals, stators and rotors are forced to be lubricated, and cooling is provided for the planetary gear reduction mechanism, the stator and the rotor of the generator; the mechanical oil pump includes a pump body and a driving gear and a transmission gear mounted on the pump body, and the driving gear and the transmission gear are meshed; the flywheel is mounted on the output end of the crankshaft near the mechanical oil pump, the torsional vibration damper is mounted on the flywheel and connected to the planetary gear reduction mechanism, the torsional vibration damper is connected to the planetary carrier input shaft of the planetary gear reduction mechanism through a spline, and the planetary gear reduction mechanism is mounted on the housing and connected to the rotor shaft of the generator.

2. The integrated series range extender generator system according to claim 1, characterized in that: It also includes a lubricating oil filter, a lubricating oil circuit is provided on the housing, and the lubricating oil circuit is respectively provided with oil outlets corresponding to the flywheel, the planetary gear reduction mechanism and the rotor. The oil inlet line of the lubricating oil filter is connected to the mechanical oil pump, and the oil outlet line of the lubricating oil filter is connected to the lubricating oil circuit.

3. The integrated series range extender generator system according to claim 2, characterized in that: The lubricating oil filter is arranged outside the housing.

4. The integrated series range extender generator system according to claim 1, wherein: The crankshaft output end gear of the engine is meshed with the driving gear for transmission.

5. The integrated series range extender generator system according to claim 1, characterized in that: The planetary gear reduction mechanism includes a planetary carrier, a sun gear, planetary gears and a fixed locking outer ring gear. The planetary gears are mounted on the planetary carrier and mesh with the sun gear and the fixed locking outer ring gear respectively. The fixed locking outer ring gear is mounted on the housing, and the sun gear is connected to the rotor shaft of the generator.

6. The integrated series range extender generator system according to claim 5, characterized in that: The fixed locking outer gear ring is fixedly locked with the housing.

7. The integrated series range extender generator system according to claim 5, characterized in that: The sun gear is connected to the rotor shaft of the generator via a spline.

8. The integrated series range extender generator system according to claim 5, characterized in that: The generator is a high-speed generator.

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