Direct connection generator and power assembly
By integrating the torsional shock absorber into the motor rotor assembly and connecting it between the rotor core and the rotor shaft, the problem of excessive axial size of the generator is solved, achieving a more compact structural design and reducing the effect of NVH.
Patent Information
- Application Number
- CN202411789042.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-03-25
AI Technical Summary
In the prior art, the axial size of the generator is too large, resulting in limited layout of the interior space scheme.
By integrating the torsional shock absorber into the motor rotor assembly and connecting it between the rotor core and the rotor shaft, the axial dimensions integrated with the engine are reduced, while eliminating the NVH impact of engine torsional vibration on motor speed fluctuations.
It realizes reducing the axial dimension of the generator, improving the use of interior space, and reducing the impact of NVH.
Smart Images
Figure CN119696252A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of vehicle range extenders, and in particular to a direct-connected generator and a power assembly. Background Art
[0002] Energy conservation and environmental protection are eternal themes in the automotive field. As we all know, pure electric vehicles are affected by factors such as low specific energy and high price of current power batteries. The driving range cannot meet the needs of long-distance travel, and people have range anxiety about pure electric vehicles. Range extenders can effectively solve the range anxiety problem of pure electric vehicles and have become a development trend of new energy vehicles. Range extenders are generally composed of an engine and a generator.
[0003] In the related art, the motor is connected to the engine through an electromagnetic clutch. Although the electromagnetic clutch is integrated into the generator rotor assembly, it still has no advantage in length. After the generator is connected to the engine, the overall axial length is too long. Summary of the invention
[0004] In the related art, the axial dimension of the generator is too large, which leads to the problem that the space layout inside the vehicle is limited.
[0005] In a first aspect, an embodiment of the present application provides a direct-connected generator, which includes: a generator stator assembly, a rotor shaft and a rotor core assembly; wherein:
[0006] Generator stator assembly;
[0007] A rotor shaft, which is used to be detachably connected to an engine crankshaft of an engine, a torsional damper is provided circumferentially on the rotor shaft, and the rotor shaft is located in the generator stator assembly;
[0008] The rotor core assembly is sleeved on the torsional vibration damper, and the rotor core assembly is connected to the rotor shaft through the torsional vibration damper.
[0009] In combination with the first aspect, in one implementation, the rotor core assembly and the torsional vibration damper are coaxially arranged with the rotor shaft.
[0010] In combination with the first aspect, in one implementation, an adapter flange is provided at the end of the rotor shaft, and the adapter flange is used to dock with the engine crankshaft.
[0011] In combination with the first aspect, in one embodiment, the adapter flange is provided with a connecting hole for connecting bolts to pass through, and the adapter flange is detachably connected to the rotor shaft via the connecting bolts.
[0012] In combination with the first aspect, in one implementation, the adapter flange is coaxially arranged with the rotor shaft.
[0013] In combination with the first aspect, in one implementation, a first rotational speed position sensor is provided on the torsional vibration damper.
[0014] In combination with the first aspect, in one implementation, a motor housing and a motor end cover are provided on the outside of the generator stator assembly.
[0015] In combination with the first aspect, in one implementation, a second speed position sensor is provided on the motor end cover.
[0016] In combination with the first aspect, in one implementation, the method further includes:
[0017] An engine crankshaft flange, which is used to connect to the end of the engine crankshaft;
[0018] A spline connecting shaft flange is arranged at the end of the rotor shaft, and the spline connecting shaft flange is used for fixed connection with the engine crankshaft flange.
[0019] In a second aspect, an embodiment of the present application provides a powertrain, comprising: a direct-connected generator as described in any one of the above
[0020] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:
[0021] The present application reduces the axial size of the integration with the engine by integrating the torsional vibration damper into the motor rotor assembly. Furthermore, the torsional vibration damper is connected between the rotor core and the rotor shaft, and the torsional vibration damper eliminates the NVH effect caused by the torsional vibration of the engine on the motor speed fluctuation. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0023] Figure 1 A schematic diagram of a direct-connected generator in an embodiment of the present application;
[0024] Figure 2 It is a partial schematic diagram of a direct-connected generator in an embodiment of the present application.
[0025] In the figure: 1. generator stator assembly; 2. rotor shaft; 3. engine; 31. engine crankshaft; 4. rotor core assembly; 5. torsional vibration damper; 6. adapter flange; 7. connecting bolts. DETAILED DESCRIPTION
[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0027] In the related art, the axial dimension of the generator is too large, which leads to the problem that the space layout inside the vehicle is limited.
[0028] First, as Figure 1 and Figure 2 As shown, the present application provides a direct-connected generator, which includes: a generator stator assembly 1, a rotor shaft 2 and a rotor core assembly 4; wherein,
[0029] A rotor shaft 2 is used for detachably docking with an engine crankshaft 31 of an engine 3, a torsional vibration damper 5 is circumferentially provided on the rotor shaft 2, and the rotor shaft 2 is located in the generator stator assembly 1; a rotor core assembly 4 is sleeved on the torsional vibration damper 5, and the rotor core assembly 4 is connected to the rotor shaft 2 via the torsional vibration damper 5.
[0030] It is worth noting that the present application reduces the axial size of the engine integration by integrating the torsional vibration damper into the motor rotor assembly. Furthermore, the torsional vibration damper is connected between the rotor core and the rotor shaft, and the torsional vibration damper eliminates the NVH effect caused by the engine torsional vibration on the motor speed fluctuation.
[0031] Furthermore, the rotor core assembly 4 and the torsional vibration damper 5 are coaxially arranged with the rotor shaft 2 .
[0032] It is understandable that in order to further improve the integration of the generator, a torsional vibration damper 5 is used to replace the connecting bracket between the rotor shaft 2 and the rotor core assembly 4. While eliminating the connecting bracket, the torsional vibration damper is used to eliminate the NVH effect caused by the engine torsional vibration on the motor speed fluctuation.
[0033] In some preferred implementations, Figure 1 As shown, the end of the rotor shaft 2 is provided with an adapter flange 6, and the adapter flange 6 is used to dock with the engine crankshaft 31. Optionally, the adapter flange 6 and the rotor shaft 2 are coaxially arranged.
[0034] It is worth noting that the adapter flange 6 is coaxially fixedly connected to the rotor shaft 2 of the generator, so that the motor of the range extender for the independent motor type electric vehicle is connected to the output end of the engine by hard connection. The overall structure is more compact, easy to disassemble and assemble, the connection structure is stable, and the cost is lower. Replacing the electromagnetic clutch with a hard connection does not require a coil winding specifically for power generation, and can also reduce the starter and flywheel ring gear on the engine, which can effectively reduce costs. Furthermore, the assembly solution can ensure the modularity of different engine crankshaft interfaces and generator half-shaft interfaces through the design of different flange structures, increase the platform design of the core components of the assembly solution, and improve the reliability of the assembly.
[0035] In a first optional implementation manner provided in the present application, a connection hole for a connection bolt 7 to pass through is provided on the adapter flange 6 , and the adapter flange 6 is detachably connected to the rotor shaft 2 via the connection bolt 7 .
[0036] In the second optional implementation manner provided by the present application, in the first optional implementation manner provided by the present application, the direct-connected generator includes an engine crankshaft flange and a spline connection shaft flange; wherein,
[0037] An engine crankshaft flange, which is used to be connected to the end of the engine crankshaft 31; a spline connecting shaft flange, which is arranged at the end of the rotor shaft 2, and the spline connecting shaft flange is used to be fixedly connected to the engine crankshaft flange.
[0038] It is worth noting that the engine crankshaft and the adapter flange are connected by bolts, and the generator shaft and the adapter flange are matched by splines. This solution can retain the existing structural solution of the engine crankshaft and generator shaft to the greatest extent, and the solution has strong versatility.
[0039] Furthermore, a motor housing and a motor end cover are provided on the outer side of the generator stator assembly 1 .
[0040] In some preferred implementations, in order to monitor the generator status in real time, a first speed position sensor is provided on the torsional vibration damper 5. A second speed position sensor is provided on the motor end cover.
[0041] In a second aspect, the present application provides a power assembly, which includes: a direct-connected generator as described in any one of the above, which includes: a generator stator assembly 1, a rotor shaft 2 and a rotor core assembly 4; wherein,
[0042] A rotor shaft 2 is used for detachably docking with an engine crankshaft 31 of an engine 3, a torsional vibration damper 5 is circumferentially provided on the rotor shaft 2, and the rotor shaft 2 is located in the generator stator assembly 1; a rotor core assembly 4 is sleeved on the torsional vibration damper 5, and the rotor core assembly 4 is connected to the rotor shaft 2 via the torsional vibration damper 5.
[0043] It is worth noting that the present application reduces the axial size of the engine integration by integrating the torsional vibration damper into the motor rotor assembly. Furthermore, the torsional vibration damper is connected between the rotor core and the rotor shaft, and the torsional vibration damper eliminates the NVH effect caused by the engine torsional vibration on the motor speed fluctuation.
[0044] Furthermore, the rotor core assembly 4 and the torsional vibration damper 5 are coaxially arranged with the rotor shaft 2 .
[0045] It is understandable that in order to further improve the integration of the generator, a torsional vibration damper 5 is used to replace the connecting bracket between the rotor shaft 2 and the rotor core assembly 4. While eliminating the connecting bracket, the torsional vibration damper is used to eliminate the NVH effect caused by the engine torsional vibration on the motor speed fluctuation.
[0046] In some preferred implementations, Figure 1 As shown, the end of the rotor shaft 2 is provided with an adapter flange 6, and the adapter flange 6 is used to dock with the engine crankshaft 31. Optionally, the adapter flange 6 and the rotor shaft 2 are coaxially arranged.
[0047] It is worth noting that the adapter flange 6 is coaxially fixedly connected to the rotor shaft 2 of the generator, so that the motor of the independent motor electric vehicle range extender is connected to the engine output end by hard connection, and the overall structure is more compact, easy to disassemble and assemble, the connection structure is stable, and the cost is lower. Replacing the electromagnetic clutch with a hard connection does not require a coil winding specifically for power generation, and can also reduce the starter and flywheel ring gear on the engine, which can effectively reduce costs.
[0048] In a first optional implementation manner provided in the present application, a connection hole for a connection bolt 7 to pass through is provided on the adapter flange 6 , and the adapter flange 6 is detachably connected to the rotor shaft 2 via the connection bolt 7 .
[0049] In the second optional implementation manner provided by the present application, in the first optional implementation manner provided by the present application, the direct-connected generator includes an engine crankshaft flange and a spline connection shaft flange; wherein,
[0050] An engine crankshaft flange, which is used to be connected to the end of the engine crankshaft 31; a spline connecting shaft flange, which is arranged at the end of the rotor shaft 2, and the spline connecting shaft flange is used to be fixedly connected to the engine crankshaft flange.
[0051] It is worth noting that the engine crankshaft and the adapter flange are connected by bolts, and the generator shaft and the adapter flange are matched by splines. This solution can retain the existing structural solution of the engine crankshaft and generator shaft to the greatest extent, and the solution has strong versatility.
[0052] Furthermore, a motor housing and a motor end cover are provided on the outer side of the generator stator assembly 1 .
[0053] In some preferred implementations, in order to monitor the generator status in real time, a first speed position sensor is provided on the torsional vibration damper 5. A second speed position sensor is provided on the motor end cover.
[0054] In summary, the present application reduces the axial dimension of the integration with the engine by integrating the torsional vibration damper into the motor rotor assembly. Furthermore, the torsional vibration damper is connected between the rotor core and the rotor shaft, and the torsional vibration damper eliminates the NVH effect caused by the engine torsional vibration on the motor speed fluctuation. The crankshaft and the generator shaft are connected through an adapter flange solution, and the intermediate flywheel or clutch structure is removed to reduce the axial dimension. Furthermore, the engine crankshaft and the adapter flange are connected by bolts, and the generator shaft and the adapter flange are matched by splines. This solution can retain the existing structural solution of the engine crankshaft and the generator shaft to the maximum extent. In addition, the assembly solution can ensure the modularity of different engine crankshaft interfaces and generator half-shaft interfaces through the design of different flange structures, increase the platform design of the core components of the assembly solution, and improve the reliability of the assembly.
[0055] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0056] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0057] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.
Claims
1. A direct-connected generator, characterized in that: include: Generator stator assembly (1); A rotor shaft (2) used for detachably docking with an engine crankshaft (31) of an engine (3), wherein a torsional vibration damper (5) is provided circumferentially on the rotor shaft (2), and the rotor shaft (2) is located in the generator stator assembly (1); A rotor core assembly (4) is sleeved on the torsional vibration damper (5); the rotor core assembly (4) is connected to the rotor shaft (2) via the torsional vibration damper (5).
2. The direct-connected generator according to claim 1, characterized in that: The rotor core assembly (4) and the torsional vibration damper (5) are coaxially arranged with the rotor shaft (2).
3. The direct-connected generator according to claim 2, characterized in that: An adapter flange (6) is provided at the end of the rotor shaft (2), and the adapter flange (6) is used for docking with the engine crankshaft (31).
4. The direct-connected generator according to claim 3, characterized in that: The adapter flange (6) is provided with a connection hole for a connection bolt (7) to pass through, and the adapter flange (6) is detachably connected to the rotor shaft (2) via the connection bolt (7).
5. The direct-connected generator according to claim 3, characterized in that: The adapter flange (6) is coaxially arranged with the rotor shaft (2).
6. The direct-connected generator according to claim 1, characterized in that: The torsional vibration damper (5) is provided with a first rotation speed position sensor.
7. The direct-connected generator according to claim 1, characterized in that: A motor housing and a motor end cover are provided on the outside of the generator stator assembly (1).
8. The direct-connected generator according to claim 1, characterized in that: A second speed position sensor is arranged on the motor end cover.
9. The direct-connected generator according to claim 1, characterized in that: Also includes: An engine crankshaft flange, which is used to be connected to the end of the engine crankshaft (31); A spline connecting shaft flange is arranged at the end of the rotor shaft (2), and the spline connecting shaft flange is used for fixed connection with the engine crankshaft flange.
10. A powertrain, characterized in that: include: A direct-connected generator as claimed in any one of claims 1 to 9.