Flow distribution test assembly and test method for electrically-driven cooling and lubricating system
By designing a non-invasive flow distribution test component for electric drive cooling and lubrication systems, and using simulated test fixtures and simulated housing fixtures, accurate flow testing of key lubrication points inside the electric drive was achieved. This solved the problems of test deviation and structural damage in existing technologies and provided reliable data support.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING CHANGAN AUTOMOBILE CO LTD
- Filing Date
- 2026-01-28
- Publication Date
- 2026-04-21
Smart Images
Figure CN121898768A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the technical field of electric vehicles, and for example to a flow distribution test component and test method for an electric drive cooling and lubrication system. Background Technology
[0002] As the core power unit of new energy vehicles, distributed electric drive systems have significant advantages such as compact structure, high space utilization, and rapid control response through the high integration of key components such as motor stators, rotors, connecting plates, reducers, and bearings on both sides. They have become the mainstream development direction of new energy vehicle drive technology.
[0003] The cooling and lubrication system is crucial for the stable operation of a distributed electric drive system. The rationality of its internal flow distribution directly determines the heat dissipation efficiency and lubrication effect of core components such as motor windings, bearings, and planetary gear trains, thus affecting the service life and operational reliability of the electric drive assembly. Uneven flow distribution can easily lead to abnormal wear or overheating failure of local components, and in severe cases, cause the electric drive system to malfunction. Therefore, accurate testing and verification of the flow distribution in the cooling and lubrication system is a core aspect of electric drive assembly R&D and optimization. However, the highly integrated nature of distributed electric drive systems presents several significant limitations to the testing of cooling and lubrication system flow distribution: Firstly, the internal flow channels of distributed electric drive systems are complex, the space is compact, and they are mostly associated with rotating components. Existing testing methods can only obtain the total system flow or local exposed oil circuit data, and cannot accurately capture the distribution data of lubricating oil in key internal sub-components such as stator cooling oil channels, rotor bearings, and planetary gear trains. This data is the core basis for system optimization design, making it difficult for test data to provide effective support.
[0004] Secondly, existing technologies often require drilling holes, welding pipes, or connecting external flow meters in the oil circuit or the module body under test. Such invasive modifications are not only difficult to implement for heat-fitted stators, internally supplied oil motor shaft ball bearings, and high-speed rotating planetary carrier needle roller bearings with limited installation space, but also damage the original structure of the components, change the original flow resistance characteristics of the flow channel, cause a large deviation between the test results and the actual working conditions, and may damage expensive electric drive assembly prototypes, increasing R&D costs.
[0005] Third, when the distributed electric drive system is working, components such as the planetary carrier and oil guide plate rotate at high speed, and the flow of lubricating oil is significantly affected by dynamic factors such as centrifugal force. However, existing tests are mostly static tests, which are difficult to simulate real rotational conditions and cannot restore the flow state and distribution law of lubricating oil under dynamic conditions. This results in a huge deviation between the test results and the actual working conditions, making it difficult to provide reliable data references.
[0006] In summary, existing technologies are insufficient to solve the challenges of multi-path, dynamic, and non-invasive precision flow distribution testing in distributed electric drive systems due to their high integration and unique structure. There is an urgent need for a technical solution that can achieve precise and independent flow testing of all critical lubrication points within the electric drive assembly without damaging its original structure, in order to meet the actual needs of electric drive system R&D optimization and reliability verification.
[0007] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention
[0008] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.
[0009] This disclosure provides a flow distribution testing component and method for an electric drive cooling and lubrication system, enabling precise and independent flow testing of all key lubrication points without damaging the original structure of the electric drive, thus providing reliable data support for the research and optimization of electric drives.
[0010] According to a first aspect of this disclosure, a flow distribution test assembly for an electric drive cooling and lubrication system is provided, comprising: Multiple simulated test fixtures, each with the same structural features as the corresponding test module in the actual electric drive. Each simulated test fixture has a predetermined position for connecting a flow meter, which is used to detect the flow rate of lubricating oil flowing through the simulated test fixture. The simulated housing fixture is equipped with simulated oil circuits and multiple fixture mounting positions. The simulated oil circuits are consistent with the oil circuits in the actual electric drive housing, and each fixture mounting position is used to install the corresponding fixture mounting position in the simulated housing fixture. The simulated oil circuit includes a main oil circuit and multiple branch oil circuits. The main oil circuit is used to connect with an external lubricating oil supply system. Each branch oil circuit is connected to the main oil circuit and is connected to the oil inlet position of the corresponding tooling installation position so as to guide the lubricating oil to the simulated tooling under test.
[0011] In some embodiments, the simulated box fixture includes a cylinder, a main pipe, an axial pipe, and a radial pipe; the main pipe is located outside the cylinder, and the main pipe has a main oil passage inside and is connected to the axial pipe. The axial pipe is located outside the cylinder and extends along the axial direction of the cylinder. Its interior is provided with axial branch oil passages along its own extension direction. The radial pipe is located inside the cylinder and is perpendicular to the axial direction of the cylinder. Radial branch oil passages are provided inside the pipe along its own extension direction.
[0012] In some embodiments, the electric drive includes a stator module, and the simulated test fixture includes a stator test fixture corresponding to the stator module; The stator testing fixture is coaxially arranged inside the cylinder, and the maximum outer diameter of the stator testing fixture is matched with the inner diameter of the cylinder; The axial pipeline has a stator oil inlet at the position corresponding to the stator test fixture. The stator oil inlet passes through the cylinder and the axial pipeline and is connected to the axial branch oil circuit. A stator oil outlet is provided on the side of the cylinder away from the axial pipe. The stator oil outlet corresponds to the oil outlet position of the stator test fixture and is used to connect the flow meter.
[0013] In some embodiments, the stator test fixture includes a simulated stator, a simulated weld end winding, and a simulated crown end winding; The simulated welding end winding and the simulated crown end winding are respectively set at both ends of the simulated stator, and the simulated stator, the simulated welding end winding and the simulated crown end winding are coaxially arranged; The maximum outer diameter of the simulated stator is matched with the inner diameter of the cylinder, and the axial pipe has a stator oil inlet at the position corresponding to the simulated stator.
[0014] In some embodiments, the electric drive includes a rotor module, and the simulated test fixture includes a rotor test fixture corresponding to the rotor module; The rotor testing fixture is coaxially set inside the stator testing fixture. The radial pipe has a rotor oil inlet at the position corresponding to the rotor testing fixture. The rotor oil passage passes through the radial pipe and is connected to the radial branch oil passage.
[0015] In some embodiments, the rotor testing fixture includes a simulated rotor and a first sealing ring, the first sealing ring being disposed inside the simulated rotor and close to one end of the simulated rotor, and the end of the simulated rotor away from the first sealing ring being used to connect a flow meter. The radial pipe is provided with a first flange that is adapted to the first sealing ring. The first flange is provided with a rotor oil inlet that passes through itself and the radial pipe. The first sealing sleeve is fitted on the first flange and is sealed with the first flange.
[0016] In some embodiments, the electric drive includes a rear bearing module, and the simulated test fixture includes a rear bearing test fixture; the rear bearing test fixture is coaxially disposed inside the stator test fixture, and a rear bearing oil inlet is provided in the radial pipe at the position corresponding to the rotor test fixture, and the rear bearing oil passage passes through the radial pipe and is connected to the radial branch oil passage.
[0017] In some embodiments, the rear bearing test fixture includes a simulated rear bearing and a second sealing ring. The second sealing ring is disposed inside the simulated rear bearing and close to one end of the simulated rear bearing. The end of the simulated rear bearing away from the second sealing ring is used to connect a flow meter. The radial pipe is provided with a second flange that is adapted to the second sealing ring. The second flange is provided with a rear bearing oil inlet that passes through itself and the radial pipe. The second seal is sleeved on the second flange and is sealed with the second flange.
[0018] In some embodiments, the electric drive includes a coaxial reducer module, and the simulated test fixture includes a reducer test fixture; the reducer test fixture is disposed in the cylinder, the reducer test fixture is provided with a dedicated oil circuit for the reducer, and the dedicated oil circuit for the reducer is connected to the axial branch oil circuit.
[0019] In some embodiments, the reducer test fixture includes a simulated central plate, a simulated reducer, and a simulated motor shaft; the simulated central plate is disposed outside the cylinder, the simulated reducer is assembled on the simulated central plate, and the simulated motor shaft is disposed inside the cylinder and is connected to the simulated reducer in a transmission manner. The simulated central plate is equipped with a dedicated oil circuit for the reducer, which includes a dedicated oil inlet and an oil outlet. The dedicated oil inlet is connected to the axial branch oil circuit, and the oil outlet corresponds to the internal space of the simulated reducer. The oil outlet is used to connect to the flow meter.
[0020] In some embodiments, the simulated reducer includes a simulated reducer housing, a simulated planetary carrier, a simulated oil guide plate, and an annular oil collection groove; the annular oil collection groove is fixedly connected to the simulated reducer housing, and is disposed around the simulated planetary carrier and the simulated oil guide plate, and is used to connect a flow meter.
[0021] In some embodiments, the inner wall of the first cavity maintains an assembly gap with the outer wall of the simulated planetary carrier and the simulated planetary gear, and the inner wall of the second cavity maintains an assembly gap with the outer wall of the simulated planetary carrier and the simulated oil guide plate; the lubricating oil of the simulated needle roller bearing is collected in the first cavity, and the lubricating oil leaking from the assembly gap is collected in the second cavity; the first cavity is provided with a first cavity oil outlet for connecting a flow meter, and the second cavity is provided with a second cavity oil outlet for connecting a flow meter.
[0022] In some embodiments, the electric drive includes a motor shaft front bearing module, and the simulated test fixture includes a motor shaft front bearing test fixture. The motor shaft front bearing test fixture has an internal hollow space and is equipped with a front bearing oil outlet that is connected to the hollow space. The front bearing oil outlet is used to connect a flow meter. The dedicated oil circuit for the reducer in the simulated center plate includes the front bearing oil inlet. The front bearing test fixture for the motor shaft is mounted on the simulated center plate, and the front bearing oil inlet is connected to the hollow space of the front bearing test fixture for the motor shaft.
[0023] According to a second aspect of this disclosure, a method for testing the flow distribution of an electric drive cooling and lubrication system is provided, implemented based on the flow distribution testing components provided in the first aspect of this disclosure, including: The control system supplies lubricating oil to the simulated oil circuit of the simulated box fixture, and adjusts the oil temperature and total flow rate of the lubricating oil to the target value; After the lubricating oil flow stabilizes, the flow rate data is read from the flow meter to obtain the flow rate of the lubricating oil flowing through the module under test.
[0024] The flow distribution testing component and method for the electric drive cooling and lubrication system provided in this disclosure can achieve the following technical effects: The flow distribution test component for the electric drive cooling and lubrication system provided in this embodiment configures a dedicated simulated test fixture for each module to be tested in the electric drive. All simulated test fixtures are accurately replicated according to the structural characteristics of the corresponding module to be tested. At the same time, they are matched with simulated housing fixtures that are completely consistent with the actual electric drive housing structure and oil circuit. The simulated housing fixtures are provided with a main oil circuit and multiple branch oil circuits. The branch oil outlets are precisely corresponding to the installation positions of each fixture. By connecting a flow meter to a predetermined position of the simulated test fixture, the flow data of each key sub-component can be independently collected, and the distribution pattern of lubricating oil in the internal key components can be accurately captured. The flow distribution test component adopts a non-invasive adaptation design. The simulated test fixture and the simulated housing fixture are detachably connected through fixture mounting positions and sealed assembly, eliminating the need for drilling, welding, or other modifications to the actual electric drive. This fully preserves the original structural integrity, and the simulated oil circuit routing, branch layout, and flow resistance characteristics are consistent with the oil circuit in the actual electric drive housing. The simulated test fixture and the test module structure are precisely matched, ensuring that the original characteristics of the flow channel remain unchanged during testing, avoiding test deviations, protecting the actual electric drive, and reducing R&D costs. Through this overall design, accurate and independent flow testing of all critical lubrication points is achieved without damaging the original structure of the electric drive, providing reliable data support for the R&D and optimization of the electric drive.
[0025] The above general description and the description below are exemplary and illustrative only and are not intended to limit this disclosure. Attached Figure Description
[0026] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a schematic diagram of an electric drive provided in an embodiment of the present disclosure; Figure 2This is a schematic diagram of the structure of a box provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of a stator testing fixture provided in an embodiment of this disclosure; Figure 4 This is an assembly diagram of a housing and stator testing fixture provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of a rotor testing fixture provided in an embodiment of this disclosure; Figure 6 This is an assembly diagram of a housing, stator testing fixture, and rotor testing fixture provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of the structure of a rear bearing testing fixture provided in an embodiment of this disclosure; Figure 8 This is an assembly diagram of a housing, stator testing fixture, and rear bearing testing fixture provided in an embodiment of this disclosure; Figure 9 This is a schematic diagram of a simulated connecting plate provided in an embodiment of this disclosure; Figure 10 This is an assembly diagram of a housing and a simulated central connecting plate provided in an embodiment of this disclosure; Figure 11 This is a schematic diagram of the structure of a test fixture for the front bearing of a motor shaft provided in an embodiment of this disclosure; Figure 12 This is an assembly diagram of a housing, a simulated central connecting plate, and a test fixture for the front bearing of a motor shaft provided in an embodiment of this disclosure; Figure 13 This is an assembly diagram of a housing and reducer testing fixture provided in an embodiment of this disclosure; Figure 14 This is provided by the embodiments of this disclosure. Figure 13 Side view; Figure 15 This is a schematic diagram of the structure of an annular oil collection groove provided in an embodiment of this disclosure; Figure 16 This is provided by the embodiments of this disclosure. Figure 15 A sectional view.
[0027] Explanation of appendage labeling: 101 Housing, 102 Left stator assembly, 103 Right stator assembly, 104 Left reducer; 105 Right reducer, 106 Left motor shaft, 107 Right motor shaft, 108 Front bearing of left motor shaft; 109 Right motor shaft front bearing, 110 Left motor rotor, 111 Right motor rotor; 112 Left motor shaft rear bearing; 113 Right motor shaft rear bearing; 114 Left center connecting plate, 115 Right center connecting plate; 1. Simulated box fixture, 11. Cylinder, 12. Main pipe, 13. Axial pipe; 14 Radial pipe, 141 First flange, 142 Second flange; 1000 Simulated oil circuit, 1001 Main oil circuit, 1002 Axial branch oil circuit; 1003 Radial branch oil passage, 1004 Stator oil inlet; 1005 Oil outlet at the welding end of the left stator; 1006 Oil outlet at the welding end of the right stator; 1007 Common crown end oil outlet, 1008 Rotor oil inlet, 1009 Rear bearing oil inlet; 2. Stator testing fixtures, 21. Simulated stator; 22 Simulates the welding end winding; 23 Simulates the crown end winding. 3 Rotor testing fixture, 31 Simulated rotor, 32 First sealing ring; 4 Rear bearing test fixture, 41 Simulated rear bearing, 42 Second sealing ring; 5. Testing fixture for the front bearing of the motor shaft; 51. Oil outlet of the front bearing; 6. Gearbox testing fixture; 61 Simulated connecting plate, 611 Dedicated oil circuit for reducer, 612 Dedicated oil inlet; 613 Reducer oil outlet, 614 Front bearing oil inlet; 62 Simulated reducer, 621 Simulated reducer housing; 622 Simulates the planetary carrier; 623 Simulates the planetary gears; 624 Simulated pin, 6241 Pin oil inlet chamber, 6242 Pin oil outlet; 625 Simulates needle roller bearing; 626 Simulates oil guide plate; 627 Annular oil collecting groove, 6271 First groove cavity, 62711 Oil outlet of the first groove cavity; 6272 Second cavity, 62721 Oil outlet of the second cavity, 6273 Left side baffle; 6274 Right side baffle, 6275 Middle baffle, 6276 Bolt mounting point; 628 mating surfaces; 63 Simulated motor shaft. Detailed Implementation
[0028] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.
[0029] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0030] Unless otherwise stated, the term "multiple" means two or more.
[0031] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.
[0032] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.
[0033] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.
[0034] like Figure 1 As shown, this embodiment divides the electric drive into multiple modules, including a housing 101, a stator module, a rotor module, a rear bearing module, a motor shaft front bearing module, and a coaxial reducer module. Here, the stator module, rotor module, rear bearing module, motor shaft front bearing module, and coaxial reducer module are all test modules in the electric drive whose lubricating oil flow needs to be tested. Specifically, the stator module includes a left stator assembly 102 and a right stator assembly 103; the rotor module includes a left motor rotor 110 and a right motor rotor 111; the rear bearing module includes a left motor shaft rear bearing 112 and a right motor shaft rear bearing 113; the motor shaft front bearing module includes a left motor shaft 106, a right motor shaft 107, a left motor shaft front bearing 108, and a right motor shaft front bearing 109; and the coaxial reducer module includes a left reducer 104, a right reducer 105, a left center plate 114, and a right center plate 115.
[0035] Regarding the module division method of the above-mentioned electric drive, this disclosure provides a flow distribution test component for an electric drive cooling and lubrication system, such as... Figures 2 to 16 As shown, the flow distribution test assembly includes a simulated housing fixture 1 and multiple simulated test fixtures. The simulated housing fixture 1 has the same structural features as the housing 101 in the actual electric drive, and each simulated test fixture has the same structural features as the corresponding test module in the actual electric drive. Specifically, the simulated test fixtures include a stator test fixture 2, a rotor test fixture 3, a front bearing test fixture 5, a rear bearing test fixture 4, and a reducer test fixture 6. The stator test fixture 2, rotor test fixture 3, front bearing test fixture 5, rear bearing test fixture 4, and reducer test fixture 6 correspond to the stator module, rotor module, rear bearing module, front bearing module, and coaxial reducer module in the actual electric drive, respectively. Each simulated test fixture has a predetermined position for connecting a flow meter, which is used to detect the flow rate of lubricating oil flowing through the simulated test fixture.
[0036] The simulated housing fixture 1 is equipped with a simulated oil circuit 1000 and multiple fixture mounting positions. The simulated oil circuit 1000 is consistent with the oil circuit in the actual electric drive housing 101. Each fixture mounting position is used for installation in the corresponding fixture mounting position in the simulated housing fixture 1. The simulated oil circuit 1000 includes a main oil circuit 1001 and multiple branch oil circuits. The main oil circuit 1001 is used to connect to an external lubricating oil supply system. Each branch oil circuit is connected to the main oil circuit 1001 and connects to the oil inlet position of the corresponding fixture mounting position so as to guide the lubricating oil to the simulated fixture under test.
[0037] When the flow distribution test component is needed to test the lubricating oil flow rate of the module under test in the electric drive, the main oil circuit 1001 of the simulated oil circuit 1000 of the simulated housing fixture 1 is connected to the external lubricating oil supply system. The simulated test fixture corresponding to the module under test is installed in the designated fixture installation position in the simulated housing fixture 1, and a flow meter is connected to the predetermined position of the simulated test fixture. Based on the above flow distribution test component, the flow rate of the lubricating oil flowing through the module under test can be obtained by the following flow distribution test method: start the oil supply system, control the oil supply system to supply lubricating oil to the simulated oil circuit 1000 of the simulated housing fixture 1, and adjust the oil temperature and total flow rate of the lubricating oil to the target value. After the lubricating oil flow stabilizes, read the flow data from the flow meter. This flow data can be used as the flow rate of the lubricating oil flowing through the module under test.
[0038] The flow distribution test component of the electric drive cooling and lubrication system provided in this embodiment configures a dedicated simulated test fixture for each module to be tested in the electric drive. All simulated test fixtures are accurately replicated according to the structural characteristics of the corresponding module to be tested. At the same time, they are matched with a simulated housing fixture 1 that is completely consistent with the structure and oil circuit of the actual electric drive housing 101. The simulated housing fixture 1 is provided with a main oil circuit 1001 and multiple branch oil circuits. The branch oil outlets are precisely corresponding to the installation positions of each fixture. By connecting a flow meter at a predetermined position of the simulated test fixture, the flow data of each key sub-component can be independently collected, and the distribution pattern of lubricating oil in the internal key components can be accurately captured. The flow distribution test component adopts a non-invasive adaptation design. The simulated test fixture and the simulated housing fixture 1 are detachably connected through fixture mounting positions and sealed assembly, eliminating the need for drilling, welding, or other modifications to the actual electric drive. This fully preserves the integrity of the original structure. Furthermore, the routing, branching layout, and flow resistance characteristics of the simulated oil circuit 1000 are consistent with the oil circuit of the housing 101 in the actual electric drive. The simulated test fixture and the test module are structurally precisely matched, ensuring that the original characteristics of the flow channel remain unchanged during testing, avoiding test deviations, protecting the actual electric drive, and reducing R&D costs. Through this overall design, accurate and independent flow testing of all critical lubrication points is achieved without damaging the original structure of the electric drive, providing reliable data support for the R&D and optimization of the electric drive.
[0039] In some embodiments, such as Figure 2 As shown, the simulated box fixture 1 includes a cylinder 11, a main pipe 12, an axial pipe 13, and a radial pipe 14. The main pipe 12 is located outside the cylinder 11, and a main oil passage 1001 is provided inside the main pipe 12, which is connected to the axial pipe 13. The axial pipe 13 is located outside the cylinder 11, extends along the axial direction of the cylinder 11, and has axial branch oil passages 1002 provided inside it along its own extension direction. The radial pipe 14 is located inside the cylinder 11, is perpendicular to the axial direction of the cylinder 11, and has radial branch oil passages 1003 provided inside it along its own extension direction.
[0040] The main oil passage 1001, axial branch oil passage 1002, and radial branch oil passage 1003 constitute the simulated oil passage 1000. The lubricating oil from the oil supply system can enter the axial branch oil passage 1002 and the radial branch oil passage 1003 through the main oil passage 1001. The pipe diameter, direction, and flow resistance characteristics of the main oil passage 1001, axial branch oil passage 1002, and radial branch oil passage 1003 of the simulated housing fixture 1 are completely consistent with those of the housing 101 in the actual electric drive. Moreover, the assembly relationship between each pipe and the test fixture replicates the assembly state of the real assembly, ensuring that the flow law of the oil in the test system is highly consistent with the actual working conditions, thus fundamentally solving the test deviation problem caused by the distortion of the flow channel simulation.
[0041] In some embodiments, the electric drive includes a stator module, and the simulated test fixture includes a stator test fixture 2 corresponding to the stator module. For example... Figures 2 to 4 As shown, the stator testing fixture 2 is coaxially arranged inside the cylinder 11, and the maximum outer diameter of the stator testing fixture 2 is adapted to the inner diameter of the cylinder 11. The axial pipe 13 has a stator oil inlet 1004 at a position corresponding to the stator testing fixture 2. The stator oil inlet 1004 passes through the cylinder 11 and the axial pipe 13 and is connected to the axial branch oil passage 1002. A stator oil outlet is provided on the side of the cylinder 11 away from the axial pipe 13, corresponding to the oil outlet position of the stator testing fixture 2, and is used to connect a flow meter.
[0042] In this embodiment, two stator test fixtures 2 are provided, symmetrically arranged on both sides of the radial pipe 14 inside the cylinder 11. Lubricating oil from the oil supply system enters the axial branch oil passage 1002 through the main oil passage 1001, then flows into the stator test fixture 2 through the stator inlet 1004, and subsequently into the stator outlet. A flow meter connected to the stator outlet can then obtain the flow rate data passing through the stator test fixture 2. As an independent simulation component, the stator test fixture 2 eliminates the need for invasive modifications such as drilling or connecting pipes to the actual electric drive stator module, fully preserving the structural integrity of the prototype and avoiding damage to the stator core and windings during modification, thus reducing the risk of loss of expensive prototype components.
[0043] In some embodiments, the stator testing fixture 2 includes a simulated stator 21, a simulated welded end winding 22, and a simulated crown end winding 23, wherein the simulated stator 21 is a cylindrical component. The simulated welded end winding 22 and the simulated crown end winding 23 are respectively disposed at both ends of the simulated stator 21, and the simulated stator 21, the simulated welded end winding 22, and the simulated crown end winding 23 are coaxially arranged. The maximum outer diameter of the simulated stator 21 is adapted to the inner diameter of the cylindrical body 11, and the axial pipe 13 has a stator oil inlet 1004 at a position corresponding to the simulated stator 21.
[0044] In this embodiment, the stator oil outlet includes a left stator welding end oil outlet 1005, a right stator welding end oil outlet 1006, and a common crown end oil outlet 1007. All three outlets can be connected to a flow meter. The left stator welding end oil outlet 1005 is located near the simulated welding end winding 22 of the stator test fixture 2 on the left side, the right stator welding end oil outlet 1006 is located near the simulated welding end winding 22 of the stator test fixture 2 on the right side, and the common crown end oil outlet 1007 is located in the area between the two stator test fixtures 2.
[0045] In some embodiments, the electric drive includes a rotor module, and the simulated test fixture includes a rotor test fixture 3 corresponding to the rotor module. For example... Figures 2 to 6 As shown, the rotor testing fixture 3 is coaxially arranged inside the stator testing fixture 2. The radial pipe 14 has a rotor oil inlet 1008 at a position corresponding to the rotor testing fixture 3. The rotor oil passage passes through the radial pipe 14 and is connected to the radial branch oil passage 1003. The rotor testing fixture 3 is designed with reference to the actual rotor module's dimensions, assembly clearance, and oil supply path. Its inner diameter, outer diameter, and width are consistent with the actual rotor module to ensure that the flow resistance characteristics and lubrication path of the oil flowing through the bearing are exactly the same as those under actual working conditions.
[0046] The rotor testing fixture 3 includes a simulated rotor 31 and a first sealing ring 32. The first sealing ring 32 is located inside the simulated rotor 31 and near one end of the simulated rotor 31. The end of the simulated rotor 31 away from the first sealing ring 32 is used to connect a flow meter. A first flange 141 adapted to the first sealing ring 32 is provided on the outside of the radial pipe 14. The first flange 141 is provided with a rotor oil inlet 1008 that penetrates itself and the radial pipe 14. The first sealing sleeve is fitted onto the first flange 141 and seals with the first flange 141.
[0047] The simulated rotor 31 precisely replicates the structure and flow channel of the actual rotor. Combined with the independent radial branch oil circuit 1003 design, it ensures that the flow state and pressure loss of the oil during the test are highly consistent with the actual working conditions, avoiding measurement errors caused by structural simulation distortion. The precise fit and sealing structure design of the first sealing ring 32 and the first flange 141 completely blocks the path of oil leakage from the assembly gap between the simulated rear bearing 41 and the radial pipe 14, ensuring that all oil entering the simulated rotor 31 can be directed to the flow meter without flow loss.
[0048] In this embodiment, there are two rotor test fixtures 3, which are symmetrically arranged on both sides of the radial pipe 14 inside the cylinder 11. The lubricating oil of the oil supply system can enter the radial branch oil passage 1003 through the main oil passage 1001, and then flow into the simulated rotor 31 through the rotor oil inlet 1008, and then flow to the end of the simulated rear bearing 41 away from the second sealing ring 42.
[0049] In this embodiment, the stator test fixture 2 and the rotor test fixture 3 can be simultaneously assembled into the simulation housing fixture 1 to detect the lubricating oil flow rate. The oil supply system is started, and the system is controlled to supply lubricating oil to the simulated oil circuit 1000 of the simulation housing fixture 1. The oil temperature and total flow rate of the lubricating oil are adjusted to the target values. After the lubricating oil flow stabilizes, the flow rate data Q_zz_1 of the flow meter connected to the end of the two simulated rotors 31 away from the first sealing ring 32 and the flow rate Q_zz_2 of the right rotor are read respectively.
[0050] In some embodiments, the electric drive includes a rear bearing module, and the simulated fixture under test includes a rear bearing test fixture 4. For example... Figure 2 , Figure 7 and Figure 8 As shown, the rear bearing test fixture 4 is coaxially arranged inside the stator test fixture 2. The radial pipe 14 has a rear bearing oil inlet 1009 at a position corresponding to the rotor test fixture 3. The rear bearing oil inlet 1009 passes through the radial pipe 14 and is connected to the radial branch oil passage 1003. The rear bearing test fixture 4 is designed with reference to the actual rear bearing module's dimensions, assembly clearance, and oil supply path. Its inner diameter, outer diameter, and width are consistent with the actual rear bearing module, ensuring that the flow resistance characteristics and lubrication path of the oil flowing through the bearing are exactly the same as in actual working conditions.
[0051] The rear bearing test fixture 4 includes a simulated rear bearing 41 and a second sealing ring 42. The second sealing ring 42 is disposed inside the simulated rear bearing 41 and near one end of the simulated rear bearing 41. The end of the simulated rear bearing 41 away from the second sealing ring 42 is used to connect a flow meter. A second flange 142 adapted to the second sealing ring 42 is provided on the outside of the radial pipe 14. The second flange 142 is provided with a rear bearing oil inlet 1009 that penetrates itself and the radial pipe 14. The second sealing ring 42 is sleeved on the second flange 142 and is sealed with the second flange 142.
[0052] The simulated rear bearing 41 precisely replicates the actual bearing structure and flow channel. Combined with the independent radial branch oil circuit 1003 design, it ensures that the oil flow state and pressure loss during the test are highly consistent with the actual working conditions, avoiding measurement errors caused by structural simulation distortion. The precise fit and sealing structure design of the second sealing ring 42 and the second flange 142 completely blocks the path of oil leakage from the assembly gap between the simulated rear bearing 41 and the radial pipe 14, ensuring that all oil entering the simulated rear bearing 41 can be directed to the flow meter without flow loss.
[0053] In this embodiment, there are two rear bearing test fixtures 4, which are symmetrically arranged on both sides of the radial pipe 14 inside the cylinder 11. The lubricating oil of the oil supply system can enter the radial branch oil passage 1003 through the main oil passage 1001, and then flow into the simulated rear bearing 41 through the rear bearing oil inlet 1009, and then flow to the end of the simulated rear bearing 41 away from the second sealing ring 42.
[0054] In this embodiment, the stator test fixture 2 and the rear bearing test fixture 4 can be simultaneously assembled into the simulation housing fixture 1 to detect the lubricating oil flow rate. The oil supply system is started, controlling the system to supply lubricating oil to the simulated oil circuit 1000 of the simulation housing fixture 1, and adjusting the oil temperature and total flow rate to the target values. After the lubricating oil flow stabilizes, the flow data Q_dz_1, Q_dz_2, and Q_dz_3 of the flow meters connected to the left stator weld end oil outlet 1005, the common crown end oil outlet 1007, and the right stator weld end oil outlet 1006 are read respectively. The flow data Q_hzcz_1 and Q_hzcz_2 of the flow meters connected to the ends of the two simulated rear bearings 41 furthest from the second sealing ring 42 are also read respectively.
[0055] In some embodiments, the electric drive includes a coaxial reducer module, and the simulated fixture under test includes a reducer test fixture 6. For example... Figures 9 to 16 As shown, the reducer test fixture 6 is installed on the cylinder 11. The reducer test fixture 6 is equipped with a dedicated oil passage 611 for the reducer, and the dedicated oil passage 611 for the reducer is connected to the axial branch oil passage 1002. There are two reducer test fixtures 6, located on both sides of the cylinder 11.
[0056] In some embodiments, the reducer testing fixture 6 includes a simulated central connecting plate 61, a simulated reducer 62, and a simulated motor shaft 63. The simulated central connecting plate 61 is disposed outside the cylinder 11, the simulated reducer 62 is mounted on the simulated central connecting plate 61, and the simulated motor shaft 63 is disposed inside the cylinder 11 and is drively connected to the simulated reducer 62. The simulated central connecting plate 61 is provided with a dedicated oil passage 611 for the reducer, which includes a dedicated oil inlet 612 and a reducer oil outlet 613. The dedicated oil inlet 612 is connected to the axial branch oil passage 1002, and the reducer oil outlet 613 corresponds to the internal space of the simulated reducer 62 and is used to connect a flow meter. The lubricating oil of the oil supply system can enter the axial branch oil passage 1002 through the main oil passage 1001, then flow into the simulated central connecting plate 61 from the dedicated oil inlet, and then flow out of the simulated central connecting plate 61 from the reducer oil outlet 613 and into the simulated reducer 62.
[0057] The electric drive includes a front bearing module for the motor shaft, and the simulated test fixture includes a front bearing test fixture 5 for the motor shaft. The front bearing test fixture 5 has an internal hollow space and is equipped with a front bearing oil outlet 51 connected to the hollow space. The front bearing oil outlet 51 is used to connect a flow meter. The dedicated oil circuit 611 of the reducer in the simulated connecting plate 61 includes a front bearing oil inlet 614. The front bearing test fixture 5 is mounted on the simulated connecting plate 61, and the front bearing oil inlet 614 is connected to the hollow space of the front bearing test fixture 5. The lubricating oil from the oil supply system can enter the axial branch oil circuit 1002 through the main oil circuit 1001, then flow into the simulated connecting plate 61 from the dedicated oil inlet, subsequently flow out of the simulated connecting plate 61 from the front bearing oil inlet 614 and into the front bearing module, and finally flow out of the front bearing module from the front bearing oil outlet 51.
[0058] In this embodiment, the stator test fixture 2 and the rear bearing test fixture 4 can be simultaneously assembled into the simulated housing fixture 1 to detect the lubricating oil flow rate. The oil supply system is started, controlling the system to supply lubricating oil to the simulated oil circuit 1000 of the simulated housing fixture 1, and adjusting the oil temperature and total flow rate to the target values. After the lubricating oil flow stabilizes, the flow rate data Q_jsq_1 and Q_jsq_2 of the flow meters connected to the reducer oil outlet 613 of the two simulated connecting plates 61 are read respectively, and the flow rate data Q_qzc_1 and Q_qzc_2 of the flow meters connected to the front bearing oil outlet 51 of the two simulated connecting plates 61 are read respectively.
[0059] In this embodiment, one end of the simulated motor shaft 63 is connected to the drive motor of the test bench via a coupling to simulate rotational operation. The simulated reducer 62 includes a simulated reducer housing 621, which is connected to the simulated housing fixture 1. A simulated planetary carrier 622, simulated planetary gears 623, simulated pins 624, and simulated needle roller bearings 625 are installed inside the simulated reducer housing 621. A simulated oil guide plate 626 is installed on the simulated planetary carrier 622. To simulate actual assembly, three identical planetary gear assemblies (each containing a simulated planetary gear 623, simulated pins 624, and simulated needle roller bearings 625) are evenly distributed circumferentially inside the simulated reducer 62. Under actual operating conditions, there is an assembly gap at the mating surface 628 after the simulated oil guide plate 626 and the simulated planetary carrier 622 are assembled. If this gap is too large, it will reduce the amount of oil entering the simulated needle roller bearings 625, severely affecting the lubrication effect of the simulated needle roller bearings 625. Therefore, the evaluation of the amount of lubricating oil leakage at this gap is particularly critical, as the amount of leakage determines the size design of the simulated planetary carrier 622 and the simulated oil guide plate 626.
[0060] The simulated reducer 62 includes an annular oil collection groove 627, which is fixedly connected to the simulated reducer housing 621, such as by bolts. The annular oil collection groove 627 is located around the simulated planetary carrier 622 and the simulated oil guide plate 626, and remains stationary. The lubricating oil supplied by the oil supply system is sprayed from the reducer outlet 613 of the simulated connecting plate 61, flows through the simulated oil guide plate 626 to the pin shaft inlet chamber 6241, and under the action of centrifugal force, is thrown into the simulated needle roller bearing 625 through the pin shaft outlet 6242 for lubrication, and then thrown into the annular oil collection groove 627. Finally, all the lubricating oil is captured by the stationary annular oil collection groove 627.
[0061] The annular oil collecting groove 627 is annular and has two cavities, namely the first cavity 6271 and the second cavity 6272. The diameter of the annulus, the width of the cavities, and the heights of the left baffle 6273 and the right baffle 6274 can be adjusted according to actual structural needs. The first cavity 6271 and the second cavity 6272 are separated by an intermediate baffle 6275. Bolt mounting points 6276 are provided on the outer side of the annular oil collecting groove 627, which are connected to the simulated reducer housing 621 by bolts.
[0062] After assembly, the inner wall of the first cavity 6271 maintains an assembly gap but does not contact the outer walls of the simulated planetary carrier 622 and the simulated planetary gear 623. Similarly, the inner wall of the second cavity 6272 maintains an assembly gap but does not contact the outer walls of the simulated planetary carrier 622 and the simulated oil guide plate 626. When the planetary carrier rotates, the lubricating oil in the simulated needle roller bearing 625 is collected by the first cavity 6271, while any lubricating oil leaking through the assembly gap is collected by the second cavity 6272. The first cavity 6271 and the second cavity 6272 are respectively provided with a first cavity oil outlet 62711 and a second cavity oil outlet 62721, which can be connected to a flow meter. The oil supply system is activated, supplying lubricating oil to the simulated oil circuit 1000 of the simulation chamber fixture 1. The oil temperature and total flow rate are adjusted to the target values. After the lubricating oil flow stabilizes, the flow rate data Q_gz and Q_xl of the flow meters connected to the oil outlets 62711 and 6272 of the first and second chambers are read respectively. This process enables flow rate testing under dynamic operating conditions, significantly improving the consistency between test results and actual operating conditions.
[0063] Based on the above-mentioned flow distribution test components and corresponding test methods for the electric drive cooling and lubrication system, the lubricating oil flow rates of each module under test in the electric drive are as follows: Lubricating oil flow rate of left motor rotor 110: Q_zz_1; Lubricating oil flow rate of right motor rotor 111: Q_zz_2; Lubricating oil flow rate of left stator assembly 102: Q_dz_1+Q_dz_2 / 2; Lubricating oil flow rate of right stator assembly 103: Q_dz_3+Q_dz_2 / 2; Lubricating oil flow rate of the front bearing 108 of the left motor shaft: Q_qzc_1; Lubricating oil flow rate of the front bearing 109 of the right motor shaft: Q_qzc_2; Lubricating oil flow rate of the rear bearing 112 of the left motor shaft: Q_hzcz_1-Q_zz_1; Lubricating oil flow rate of the rear bearing 113 of the right motor shaft: Q_hzcz_2-Q_zz_2; Lubricating oil flow rate of left reducer 104: Q_jsq_1; Lubricating oil flow rate of right reducer 105: Q_jsq_2; Lubricating oil flow rate for a single needle roller bearing: Q_gz / 3; Lubricating oil flow rate between the oil guide plate and the planetary carrier: Q_xl.
[0064] The flow distribution test method for the electric drive cooling and lubrication system of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, such as a USB flash drive, external hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc., and other media capable of storing program code.
[0065] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.
[0066] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to fall within the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0067] The methods and products disclosed in the embodiments herein (including but not limited to devices and equipment) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
[0068] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.
Claims
1. A flow distribution testing assembly for an electric drive cooling and lubrication system, characterized in that, include: Multiple simulated test fixtures, each with the same structural features as the corresponding test module in the actual electric drive. Each simulated test fixture has a predetermined position for connecting a flow meter, which is used to detect the flow rate of lubricating oil flowing through the simulated test fixture. The simulated housing fixture is equipped with simulated oil circuits and multiple fixture mounting positions. The simulated oil circuits are consistent with the oil circuits in the actual electric drive housing, and each fixture mounting position is used to install the corresponding fixture mounting position in the simulated housing fixture. The simulated oil circuit includes a main oil circuit and multiple branch oil circuits. The main oil circuit is used to connect with an external lubricating oil supply system. Each branch oil circuit is connected to the main oil circuit and is connected to the oil inlet position of the corresponding tooling installation position so as to guide the lubricating oil to the simulated tooling under test.
2. The traffic allocation test component according to claim 1, characterized in that, The simulated box-type fixture includes a cylinder, main pipe, axial pipe, and radial pipe; The main pipeline is located outside the cylinder, and the main oil passage is located inside the main pipeline and is connected to the axial pipeline. The axial pipe is located outside the cylinder and extends along the axial direction of the cylinder. Its interior is provided with axial branch oil passages along its own extension direction. The radial pipe is located inside the cylinder and is perpendicular to the axial direction of the cylinder. Radial branch oil passages are provided inside the pipe along its own extension direction.
3. The traffic allocation test component according to claim 2, characterized in that, The electric drive includes a stator module, and the simulated test fixture includes a stator test fixture corresponding to the stator module; The stator testing fixture is coaxially arranged inside the cylinder, and the maximum outer diameter of the stator testing fixture is matched with the inner diameter of the cylinder; The axial pipeline has a stator oil inlet at the position corresponding to the stator test fixture. The stator oil inlet passes through the cylinder and the axial pipeline and is connected to the axial branch oil circuit. A stator oil outlet is provided on the side of the cylinder away from the axial pipe. The stator oil outlet corresponds to the oil outlet position of the stator test fixture and is used to connect the flow meter.
4. The traffic allocation test component according to claim 3, characterized in that, The stator testing fixture includes a simulated stator, a simulated welded end winding, and a simulated crown end winding; The simulated welding end winding and the simulated crown end winding are respectively set at both ends of the simulated stator, and the simulated stator, the simulated welding end winding and the simulated crown end winding are coaxially arranged; The maximum outer diameter of the simulated stator is matched with the inner diameter of the cylinder, and the axial pipe has a stator oil inlet at the position corresponding to the simulated stator.
5. The traffic allocation test component according to claim 3, characterized in that, The electric drive includes a rotor module, and the simulated test fixture includes a rotor test fixture corresponding to the rotor module; The rotor testing fixture is coaxially set inside the stator testing fixture. The radial pipe has a rotor oil inlet at the position corresponding to the rotor testing fixture. The rotor oil passage passes through the radial pipe and is connected to the radial branch oil passage.
6. The traffic allocation test component according to claim 5, characterized in that, The rotor testing fixture includes a simulated rotor and a first sealing ring. The first sealing ring is located inside the simulated rotor and close to one end of the simulated rotor. The end of the simulated rotor away from the first sealing ring is used to connect a flow meter. The radial pipe is provided with a first flange that is adapted to the first sealing ring. The first flange is provided with a rotor oil inlet that passes through itself and the radial pipe. The first sealing sleeve is fitted on the first flange and is sealed with the first flange.
7. The traffic allocation test component according to claim 3, characterized in that, The electric drive includes a rear bearing module, and the simulated test fixture includes a rear bearing test fixture. The rear bearing test fixture is coaxially set inside the stator test fixture. The radial pipe has a rear bearing oil inlet at the position corresponding to the rotor test fixture. The rear bearing oil passage passes through the radial pipe and is connected to the radial branch oil passage.
8. The traffic allocation test component according to claim 7, characterized in that, The rear bearing test fixture includes a simulated rear bearing and a second sealing ring. The second sealing ring is located inside the simulated rear bearing and close to one end of the simulated rear bearing. The end of the simulated rear bearing away from the second sealing ring is used to connect a flow meter. The radial pipe is provided with a second flange that is adapted to the second sealing ring. The second flange is provided with a rear bearing oil inlet that passes through itself and the radial pipe. The second seal is sleeved on the second flange and is sealed with the second flange.
9. The traffic allocation test component according to claim 2, characterized in that, The electric drive includes a coaxial reducer module, and the simulated test fixture includes a reducer test fixture. The reducer testing fixture is set in the cylinder, and the reducer testing fixture is equipped with a dedicated oil circuit for the reducer, which is connected to the axial branch oil circuit.
10. The traffic allocation test component according to claim 9, characterized in that, The speed reducer testing fixture includes a simulated center plate, a simulated speed reducer, and a simulated motor shaft; The simulated central plate is set on the outside of the cylinder, the simulated reducer is assembled on the simulated central plate, and the simulated motor shaft is set inside the cylinder and is connected to the simulated reducer for transmission. The simulated central plate is equipped with a dedicated oil circuit for the reducer, which includes a dedicated oil inlet and an oil outlet. The dedicated oil inlet is connected to the axial branch oil circuit, and the oil outlet corresponds to the internal space of the simulated reducer. The oil outlet is used to connect to the flow meter.
11. The traffic allocation test component according to claim 10, characterized in that, The simulated reducer includes a simulated reducer housing, a simulated planetary carrier, a simulated oil guide plate, and an annular oil collection groove; The annular oil collection groove is fixedly connected to the housing of the simulated reducer. The annular oil collection groove is set around the simulated planetary carrier and the simulated oil guide plate. The annular oil collection groove is used to connect the flow meter.
12. The traffic allocation test component according to claim 10, characterized in that, The inner wall of the first cavity maintains an assembly gap with the outer wall of the simulated planetary carrier and the simulated planetary gear, and the inner wall of the second cavity maintains an assembly gap with the outer wall of the simulated planetary carrier and the simulated oil guide plate. The lubricating oil of the simulated needle roller bearing is collected in the first groove, and the lubricating oil leaking from the assembly gap is collected in the second groove. The first groove is provided with a first groove outlet for connecting the flow meter, and the second groove is provided with a second groove outlet for connecting the flow meter.
13. The traffic allocation test component according to claim 10, characterized in that, The electric drive includes a motor shaft front bearing module, and the simulated test fixture includes a motor shaft front bearing test fixture. The motor shaft front bearing test fixture has an internal hollow space and is equipped with a front bearing oil outlet that is connected to the hollow space. The front bearing oil outlet is used to connect a flow meter. The dedicated oil circuit for the reducer in the simulated center plate includes the front bearing oil inlet. The front bearing test fixture for the motor shaft is mounted on the simulated center plate, and the front bearing oil inlet is connected to the hollow space of the front bearing test fixture for the motor shaft.
14. A method for testing the flow distribution of an electric drive cooling and lubrication system, characterized in that, Based on the traffic allocation test component as described in any one of claims 1 to 13, including: The control system supplies lubricating oil to the simulated oil circuit of the simulated box fixture, and adjusts the oil temperature and total flow rate of the lubricating oil to the target value; After the lubricating oil flow stabilizes, the flow rate data is read from the flow meter to obtain the flow rate of the lubricating oil flowing through the module under test.