CN216666375U - Stably-driven range extender - Google Patents
Stably-driven range extender Download PDFInfo
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- CN216666375U CN216666375U CN202123342871.6U CN202123342871U CN216666375U CN 216666375 U CN216666375 U CN 216666375U CN 202123342871 U CN202123342871 U CN 202123342871U CN 216666375 U CN216666375 U CN 216666375U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model belongs to the technical field of pure electric vehicles, and discloses a stably-driven range extender, which is used for solving the problem that the torque fluctuation of the conventional range extender is large in the transmission process. The flywheel disc is arranged on the output shaft of the engine, can store the rotational inertia when the engine runs, and can be released when the output power of the engine is insufficient to compensate and drive the rotation of the input shaft of the generator, so that the torque fluctuation of the engine can be effectively reduced; the flywheel disc is also provided with the torsional vibration damper, the torsional rigidity of the joint part of the output shaft of the engine and the input shaft of the generator can be reduced, the torsional damping is increased, the output torque fluctuation of the engine can be effectively filtered, the torsional vibration and noise generated in transmission are further eliminated, a good torque input environment is provided for the generator, the whole structure is simple and reasonable, the transmission is stable, the transmission shaft can be prevented from being deformed due to overlarge torsional rigidity, the service life is prolonged, and the maintenance cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of pure electric vehicles, and particularly relates to a range extender with stable transmission.
Background
With the shortage of petroleum resources and the promotion of policy and regulation, pure electric vehicles are more and more favored by vehicle users due to the advantages of energy conservation, environmental protection, zero emission and the like. However, the existing pure electric vehicles have the problems of poor endurance and incapability of running in a long stroke, and before the pure electric vehicles reach a destination, if the electric energy of a storage battery is exhausted, the electric vehicles cannot go forward, and at the moment, a generator set, namely a range extender, which is formed by integrating an engine and a generator with high efficiency and low emission is needed to rapidly supplement the electric energy to the storage battery, so that the problem of short endurance of the pure electric vehicles is solved.
In the existing range extender structure on the market, an output shaft of an engine is directly connected with an input shaft of a generator through a spline, and in an ideal state, the transmission ratio between the output shaft of the engine and the input shaft of the generator is 1, but when the engine outputs torque, the torque fluctuates, the fluctuation frequency changes along with the rotating speed of the engine, namely the excitation frequency of the engine, but the general range extender of a pure electric vehicle has higher torsional rigidity during transmission and cannot completely avoid the excitation frequency of the engine, so that system resonance is easily generated during torque transmission, abnormal vibration of a power assembly, a vehicle body and other systems of the pure electric vehicle is caused, adverse effects are brought to the smoothness and comfort of the whole vehicle, and the transmission efficiency is reduced; moreover, the working life of the input shaft of the generator under such working conditions is short, even when the engine runs at high power, the input shaft of the generator may collapse short, causing unexpected loss, and if the input shaft of the generator is made of a material with a large torsional coefficient, the manufacturing cost is increased, so that the range extender structure with high transmission efficiency, stable and reliable transmission and long service life is provided, which is a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
Based on the technical problems, the utility model aims to provide a range extender with stable transmission, which can reduce torque fluctuation generated in the transmission process and eliminate torsional vibration, and has the advantages of stable and reliable transmission, high safety and long service life.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a stably-driven range extender comprises an engine, a generator, a flywheel disc and a torsional vibration damper, wherein an output shaft of the engine is connected with an input shaft of the generator, the flywheel disc is arranged on the output shaft of the engine, and the torsional vibration damper is arranged on the flywheel disc.
Further, the torsional damper is a torsion-limited torsional damper.
Further, a speed-increasing gear is provided between the output shaft of the engine and the input shaft of the generator.
Further, the speed increaser is a planetary gear mechanism.
Furthermore, the planetary gear mechanism comprises a planet carrier, a sun gear and a gear ring, the planet carrier is connected with an output shaft of the engine, the sun gear is connected with an input shaft of the generator, and the gear ring is fixed.
It should be noted that the installation manner of the planetary gear mechanism is not limited to this, and any installation manner may be adopted as long as the speed increasing effect can be achieved, such as a manner of fixing the planet carrier, inputting the ring gear, and outputting the sun gear, or a manner of fixing the sun gear, inputting the planet carrier, and outputting the ring gear.
Further, the speed increaser is a two-stage gear speed increasing mechanism.
Furthermore, the input end of the secondary gear speed increasing mechanism is connected with the output shaft of the engine, and the output end of the secondary gear speed increasing mechanism is connected with the input shaft of the generator.
Furthermore, the input end and the output end of the secondary gear speed increasing mechanism are coaxially arranged.
Further, the cylinder body of the engine is connected with the shell of the generator into a whole.
Compared with the prior art, the utility model has the following beneficial effects:
1. the flywheel disc is arranged on the output shaft of the engine, can store the rotational inertia when the engine runs, and can be released when the output power of the engine is insufficient to compensate and drive the rotation of the input shaft of the generator, so that the torque fluctuation of the engine can be effectively reduced; the flywheel disc is also provided with the torsional vibration damper, the torsional rigidity of the joint part of the output shaft of the engine and the input shaft of the generator can be reduced, the torsional damping is increased, the output torque fluctuation of the engine can be effectively filtered, the torsional vibration and noise generated during transmission are further eliminated, a good torque input environment is provided for the generator, the whole structure is simple and reasonable, the transmission is stable, the transmission shaft can be prevented from being deformed due to overlarge torsional rigidity, the service life is prolonged, and the maintenance cost is reduced.
2. The torsional damper adopts the torsional damper of limit torsion formula to avoid having great angular acceleration fluctuation between the transmission shaft under the condition that the generator reverse start engine or engine sharply accelerate, torsional damper can receive too big moment of torsion impact, and the limit torsion function that it had can play the mechanical protection effect to self, prevents to damage because of excessively twisting.
3. The speed increaser is arranged between the engine and the generator, when the power of the engine is low and the rotating speed of the engine far cannot reach the rotating speed required by the power generation of the generator, if a high-power motor is adopted, the occupied area is large, the whole structure arrangement of a vehicle is not facilitated, the speed increaser not only can stably improve the rotating speed input to the generator and improve the power generation efficiency, but also has small volume, small mass and compact structure.
4. The speed increaser adopts a planetary gear mechanism, has small volume, light weight and compact structure, and is beneficial to the structural layout of the whole vehicle; the bearing capacity is high, the transmission efficiency is high, the impact resistance and the vibration resistance are strong, and the work is reliable; the transmission ratio is large, the synthesis and the decomposition of the motion can be realized, and a large transmission ratio can be obtained by using a small number of gears as long as the transmission type and the gear matching scheme of the planetary gear are properly selected; and the input shaft and the output shaft have coaxiality, so that the installation space can be greatly saved, and the transmission stability is improved.
5. The planetary gear mechanism comprises a planet carrier, a sun gear and a gear ring, the planet carrier is connected with an output shaft of the engine, the sun gear is connected with an input shaft of the generator, the gear ring is fixed, the power of the engine is transmitted to the sun gear through the planet carrier and then transmitted to the generator, the speed increasing is stable, the transmission is reliable, and the power loss is small; and multiple installation modes can be selected according to different working environments, so that the method has better adaptability.
6. The speed increaser adopts a secondary gear speed increasing mechanism, the input end of the secondary gear speed increasing mechanism is connected with the output shaft of the engine, and the output end of the secondary gear speed increasing mechanism is connected with the input shaft of the generator. The speed increaser is simple and compact in structure, convenient and fast to install, stable in operation and free of noise, and the two pairs of gear pairs can enable the speed increaser to bear large load impact, reduce the load of a shaft and prolong the service life of the speed increaser.
7. The input end and the output end of the secondary gear speed increasing mechanism are coaxially arranged, so that the output shaft of the engine and the input shaft of the generator are on the same axis, the integral structure of the range extender is further ensured to be compact, the installation space can be greatly saved, and the structural layout of the whole vehicle is facilitated.
8. The cylinder body of the engine is connected with the shell of the generator into a whole, and then a cooling water path can be installed for cooling, so that the internal space can be saved, and the structural cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The system comprises an engine 1, a speed increaser 2, a planet carrier 21, a sun wheel 22, a gear ring 23, a generator 3, a flywheel disc 4 and a torsional vibration damper 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Example 1
The stably-driven range extender shown in fig. 1 comprises an engine and a generator, wherein an output shaft of the engine is connected with an input shaft of the generator, and the range extender also comprises a flywheel disc and a torsional vibration damper, wherein the flywheel disc is arranged on the output shaft of the engine, the flywheel disc 4 can store rotational inertia when the engine 1 runs, and release energy when the output power of the engine 1 is insufficient so as to compensate and drive the input shaft of the generator 3 to rotate, and the torque fluctuation of the engine 1 can be effectively reduced; the flywheel disc 4 is also provided with the torsional vibration damper 5, the torsional vibration damper 5 can reduce the torsional rigidity of the joint part of the output shaft of the engine 1 and the input shaft of the generator 3, increase the torsional damping, effectively filter the output torque fluctuation of the engine 1, eliminate the torsional vibration and noise generated during transmission, provide a good torque input environment for the generator 3, and have the advantages of simple and reasonable integral structure, stable transmission, capability of avoiding the deformation of the transmission shaft due to overlarge torsional rigidity, prolonged service life and reduced maintenance cost.
The torsional vibration damper 5 adopts a torque-limiting type torsional vibration damper, so that the situation that the generator 3 reversely starts the engine 1 or the engine 1 is rapidly accelerated, large angular acceleration fluctuation exists between transmission shafts, the torsional vibration damper 5 can be impacted by overlarge torque, and the torque-limiting function of the torsional vibration damper can play a mechanical protection role on the torsional vibration damper and prevent the torsional vibration damper from being damaged due to the overlarge torque.
The speed increaser 2 is arranged between the output shaft of the engine 1 and the input shaft of the generator 3, when the power of the engine 1 is small and the rotating speed of the engine is far less than the rotating speed required by the power generation of the generator 3, if a high-power motor is adopted, the occupied area is large, the arrangement of the whole structure of a vehicle is not facilitated, the speed increaser 2 can stably improve the rotating speed input to the generator 3 and improve the power generation efficiency, and the speed increaser is small in size, small in mass and compact in structure.
The speed increaser 2 adopts a planetary gear mechanism, has small volume, light weight and compact structure, and is beneficial to the structural layout of the whole vehicle; the bearing capacity is high, the transmission efficiency is high, the impact resistance and the vibration resistance are strong, and the work is reliable; the transmission ratio is large, the synthesis and the decomposition of the motion can be realized, and a small number of gears can be used for obtaining the large transmission ratio as long as the transmission type and the gear matching scheme of the planetary gear are properly selected; and the input shaft and the output shaft have coaxiality, so that the installation space can be greatly saved, and the transmission stability is improved.
The planetary gear mechanism comprises a planet carrier 21, a sun gear 22 and a gear ring 23, the planet carrier 21 is connected with an output shaft of the engine 1, the sun gear 22 is connected with an input shaft of the generator 3, the gear ring 23 is fixed, the power of the engine 1 is transmitted to the sun gear 22 through the planet carrier 21 and then applied to the generator 3, a rotor shaft of the generator 3 rotates, and therefore the purpose of power generation is achieved.
The cylinder body of the engine 1 is connected with the shell of the generator 3 into a whole, and then a cooling water path can be installed for cooling, so that the internal space can be saved, and the structural cost is reduced.
Example 2
The difference between the present embodiment and embodiment 1 is that the speed increaser 2 adopts a two-stage gear speed increasing mechanism, the input end of the two-stage gear speed increasing mechanism is connected with the output shaft of the engine 1, and the output end of the two-stage gear speed increasing mechanism is connected with the input shaft of the generator 3. The speed increaser is simple and compact in structure, convenient and fast to install, stable in operation and free of noise, and the two pairs of gear pairs can enable the speed increaser to bear large load impact, reduce the load of a shaft and prolong the service life of the speed increaser.
And the input end and the output end of the secondary gear speed increasing mechanism are coaxially arranged, so that the output shaft of the engine 1 and the input shaft of the generator 3 are on the same axis, the integral structure of the range extender is further ensured to be compact, the installation space can be greatly saved, and the structural layout of the whole vehicle is facilitated.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by the equivalent or modified embodiments and the modified concepts of the present invention.
Claims (3)
1. A stably-driven range extender comprises an engine (1) and a generator (3), wherein an output shaft of the engine (1) is connected with an input shaft of the generator (3), the range extender further comprises a flywheel disc (4) and a torsional vibration damper (5), the flywheel disc (4) is installed on the output shaft of the engine (1), the torsional vibration damper (5) is installed on the flywheel disc (4), and a speed extender (2) is arranged between the output shaft of the engine (1) and the input shaft of the generator (3), and the range extender is characterized in that the speed extender (2) is a planetary gear mechanism which comprises a planet carrier (21), a sun gear (22) and a gear ring (23), the planet carrier (21) is connected with the output shaft of the engine (1), the sun gear (22) is connected with the input shaft of the generator (3), and the gear ring (23) is fixed; or the speed increaser (2) is a secondary gear speed increasing mechanism, the input end of the secondary gear speed increasing mechanism is connected with the output shaft of the engine (1), the output end of the secondary gear speed increasing mechanism is connected with the input shaft of the generator (3), and the input end and the output end of the secondary gear speed increasing mechanism are coaxially arranged.
2. The range extender of claim 1, wherein the torsional vibration damper (5) is a torque limited torsional vibration damper.
3. The range extender of claim 1, wherein the cylinder of the engine (1) is connected as one piece with the housing of the generator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123342871.6U CN216666375U (en) | 2021-12-28 | 2021-12-28 | Stably-driven range extender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123342871.6U CN216666375U (en) | 2021-12-28 | 2021-12-28 | Stably-driven range extender |
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| Publication Number | Publication Date |
|---|---|
| CN216666375U true CN216666375U (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123342871.6U Active CN216666375U (en) | 2021-12-28 | 2021-12-28 | Stably-driven range extender |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115455574A (en) * | 2022-11-14 | 2022-12-09 | 江铃汽车股份有限公司 | Design method of range-extended power system |
| CN117662291A (en) * | 2024-01-31 | 2024-03-08 | 泰州市海锋机械制造有限公司 | Generating set who contains silence structure |
| CN117662291B (en) * | 2024-01-31 | 2024-05-03 | 泰州市海锋机械制造有限公司 | Generating set who contains silence structure |
-
2021
- 2021-12-28 CN CN202123342871.6U patent/CN216666375U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115455574A (en) * | 2022-11-14 | 2022-12-09 | 江铃汽车股份有限公司 | Design method of range-extended power system |
| CN117662291A (en) * | 2024-01-31 | 2024-03-08 | 泰州市海锋机械制造有限公司 | Generating set who contains silence structure |
| CN117662291B (en) * | 2024-01-31 | 2024-05-03 | 泰州市海锋机械制造有限公司 | Generating set who contains silence structure |
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