Double-drive motor active oil-gas separator and automobile

Abstract

This invention provides a dual-drive motor active oil-gas separator and an automobile, belonging to the field of automotive component technology. It includes a first stator assembly, a second stator assembly, and a rotor assembly, with the rotor assembly sandwiched between the first and second stator assemblies. The rotor assembly includes a rotor housing with an internal oil-gas separation chamber; and an impeller assembly rotatably disposed within the oil-gas separation chamber. The impeller assembly is equipped with a first magnet and a second magnet. When the first and second stator assemblies are simultaneously energized, they generate a first magnetic field and a second magnetic field, respectively. The magnetic field directions of the first and second magnetic fields are parallel to the axial direction of the impeller assembly. This invention integrates the oil-gas separation structure with the rotor, directly using the rotor as the oil-gas separation structure. This not only achieves efficient oil-gas separation but also avoids increasing the space occupied by the entire oil-gas separator within the crankcase, thus preventing the enlargement of the crankcase volume.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology, and relates to an oil-gas separator, particularly a dual-drive motor active oil-gas separator and an automobile. Background Technology

[0002] The oil-gas separator (also known as part of the crankcase ventilation system) is a critical component in an engine, primarily used to handle oil mist and exhaust gases generated during engine operation. When the engine is running, the high pressure inside the combustion chamber can force small amounts of gas through the piston rings into the crankcase, a phenomenon known as "blow-by." These gases contain unburned fuel, combustion products, and oil vapor, which, if left untreated, can adversely affect engine performance and the environment. The main function of the oil-gas separator is to separate the oil from other components in this mixture, allowing the clean gas to be reintroduced into the intake system for combustion, while the separated oil is returned to the engine lubrication system for reuse. This not only helps reduce oil consumption but also prevents harmful emissions from being directly released into the atmosphere, thus protecting the environment.

[0003] In the existing technology, the driving force of the oil-gas separator is only a single drive motor composed of a stator and rotor. The output power of a single drive motor is limited, which restricts the oil-gas separation effect.

[0004] Patent application CN202110778474.9 discloses a dual-stator, single-rotor axial flux-modulated excitation motor, comprising two stators and one rotor. The rotor is fixed on a shaft, and bearings are mounted on the shaft. The stators and rotor rotate in conjunction. A magnetic shield is embedded within the frame of the stator. At least one of the frame, bearings, and shaft is made of a non-magnetic material. A DC excitation unit is located on the outer circumference of the stator core and is fixed within the frame. The DC excitation flux generated by the DC excitation unit passes through a closed loop via a soft magnetic pole, a first air gap, a first stator core, a first magnetic shield, a second magnetic shield, a second stator core, and a second air gap. The DC excitation flux passes through only two air gaps.

[0005] Although the existing technology discloses a dual-drive structure, the single rotor mentioned above is only the power output unit. To achieve oil-gas separation, an oil-gas separation structure needs to be connected to the output end of the single rotor. The rotation of the single rotor drives the oil-gas separation structure to rotate, thereby achieving oil-gas separation in a centrifugal manner. However, the internal space of the engine crankcase is limited. If a dual-drive structure is installed, the volume of the entire engine crankcase will be increased, thus affecting the layout of the entire engine. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a dual-drive motor active oil-gas separator that can improve oil-gas separation efficiency within existing space.

[0007] The objective of this invention can be achieved through the following technical solution: a dual-drive motor active oil-gas separator, horizontally placed inside the engine crankcase, comprising:

[0008] A first stator assembly, a second stator assembly, and a rotor assembly, wherein the rotor assembly is sandwiched between the first stator assembly and the second stator assembly, and the axes of the first stator assembly, the second stator assembly, and the rotor assembly are collinear, wherein the rotor assembly includes:

[0009] The rotor housing has an oil-gas separation chamber inside it. The chamber wall of the oil-gas separation chamber has an oil-gas inlet for the oil-gas mixture to enter, an air outlet for the air to be discharged after oil-gas separation, and an oil outlet for the oil to be discharged after oil-gas separation.

[0010] An impeller assembly is rotatably disposed within an oil-gas separation chamber, with a gap between the impeller assembly and the chamber wall. A first magnet is disposed on the side of the impeller assembly facing the first stator assembly, and a second magnet is disposed on the side of the impeller assembly facing the second stator assembly. When the first stator assembly and the second stator assembly are simultaneously energized, a first magnetic field and a second magnetic field are generated respectively. The magnetic field directions of the first magnetic field and the second magnetic field are parallel to the axial direction of the impeller assembly. Through the cooperation between the first magnetic field and the first magnet, and the second magnetic field and the second magnet, the impeller assembly is driven to rotate synchronously and in the same direction along both sides of the axial direction within the oil-gas separation chamber.

[0011] In the aforementioned dual-drive motor active oil-gas separator, the first stator assembly includes a first stator housing and a first mounting cavity is provided inside the first stator housing. The second stator assembly includes a second stator housing and a second mounting cavity is provided inside the second stator housing. Both the first mounting cavity and the second mounting cavity are sealed cavities, and the first mounting cavity, the second mounting cavity, and the oil-gas separation cavity are not interconnected.

[0012] In the aforementioned dual-drive motor active oil-gas separator, the first stator assembly, the second stator assembly, and the rotor assembly are all modular structures. The first stator housing and the rotor housing are detachably connected by fasteners, and the second stator housing and the rotor housing are detachably connected by fasteners. The first stator assembly and the second stator assembly can be interchangeably installed on either side of the rotor assembly along the axial direction.

[0013] In the aforementioned dual-drive motor active oil-gas separator, the structure of the first stator assembly is the same as that of the second stator assembly.

[0014] In the aforementioned dual-drive motor active oil-gas separator, the first stator assembly includes a first stator component, and a portion of the structure of the first stator component is located inside the first mounting cavity, while another portion of the structure of the first stator component is located outside the first mounting cavity; the second stator assembly includes a second stator component, and a portion of the structure of the second stator component is located inside the second mounting cavity, while another portion of the structure of the second stator component is located outside the second mounting cavity.

[0015] In the aforementioned dual-drive motor active oil-gas separator, the first stator assembly includes a first control unit and a first stator electrically connected to the first control unit; the second stator assembly includes a second control unit and a second stator electrically connected to the second control unit, wherein the first control unit and the second control unit are independent of each other.

[0016] In the aforementioned dual-drive motor active oil-gas separator, the first control unit includes a first electronic control PCB board and a first power supply and signal connection port electrically connected to the first electronic control PCB board, wherein the first electronic control PCB board is located inside the first mounting cavity, and the first power supply and signal connection port is located outside the first mounting cavity; the second control unit includes a second electronic control PCB board and a second power supply and signal connection port electrically connected to the second electronic control PCB board, wherein the second electronic control PCB board is located inside the second mounting cavity, and the second power supply and signal connection port is located outside the second mounting cavity.

[0017] In the aforementioned dual-drive motor active oil-gas separator, the first stator includes a first stator core made of stacked silicon steel sheets and a first stator winding wound on the silicon steel sheets, and there are multiple first stator windings arranged in a ring; the second stator includes a second stator core made of stacked silicon steel sheets and a second stator winding wound on the silicon steel sheets, and there are multiple second stator windings arranged in a ring, wherein the number of first stator windings is the same as the number of second stator windings, and the positions of the multiple first stator windings correspond one-to-one with the positions of the multiple second stator windings.

[0018] In the aforementioned dual-drive motor active oil-gas separator, the first magnet includes multiple first magnets. A portion of these first magnets have an N pole facing the first stator assembly, while another portion has an S pole facing the first stator assembly. The N-pole first magnets facing the first stator assembly and the S-pole first magnets are spaced apart. The second magnet includes multiple second magnets. A portion of these second magnets have an N pole facing the second stator assembly, while another portion has an S pole facing the second stator assembly. The N-pole second magnets facing the second stator assembly and the S-pole second magnets are spaced apart. The positions of the N-pole first magnets facing the first stator assembly and the N-pole second magnets facing the second stator assembly correspond, as do the positions of the S-pole first magnets facing the first stator assembly and the S-pole second magnets facing the second stator assembly.

[0019] In the aforementioned dual-drive motor active oil-gas separator, a first preset phase difference is formed between the first stator winding and the first magnet, and a second preset phase difference is formed between the second stator winding and the second magnet. The first preset phase difference and the second preset phase difference have the same value and the same direction.

[0020] In the aforementioned dual-drive motor active oil-gas separator, the impeller assembly includes a first mounting plane facing the first stator assembly and a second mounting plane facing the second stator assembly. A first groove for embedding a first magnet is provided on the first mounting plane, and a second groove for embedding a second magnet is provided on the second mounting plane. The opening direction of the first groove is opposite to the opening direction of the second groove. The groove depth of the first groove is equal to the thickness of the first magnet, and the groove depth of the second groove is equal to the thickness of the second magnet.

[0021] In the aforementioned dual-drive motor active oil-gas separator, the impeller assembly includes an impeller body and blades distributed annularly on the side of the impeller body, and a first magnet and a second magnet are mounted on the impeller body, wherein the impeller body and the blades are integrally injection molded.

[0022] In the aforementioned dual-drive motor active oil-gas separator, the blades are arranged in an inclined S-shape, wherein the degree of curvature of the blades toward the first stator assembly is the same as the degree of curvature of the blades toward the second stator assembly, and the two curvature directions are opposite.

[0023] In the aforementioned dual-drive motor active oil-gas separator, a connecting shaft is provided on each side of the oil-gas separation chamber along the axial direction of the rotor assembly, and a bearing is nested on the connecting shaft. The two ends of the impeller body along the axial direction are respectively nested and fitted with the bearings on the corresponding side connecting shafts.

[0024] In the aforementioned dual-drive motor active oil-gas separator, the first stator housing is provided with multiple first connecting lugs, the second stator housing is provided with multiple second connecting lugs, and the rotor housing is provided with multiple third connecting lugs and multiple fourth connecting lugs at both ends along the axial direction. When the first stator assembly is connected to the rotor assembly, the positions of the multiple first connecting lugs correspond one-to-one with the positions of the multiple third connecting lugs; when the second stator assembly is connected to the rotor assembly, the positions of the multiple second connecting lugs correspond one-to-one with the positions of the multiple fourth connecting lugs.

[0025] In the above-mentioned dual-drive motor active oil-gas separator, the number of first connecting lugs, second connecting lugs, third connecting lugs and fourth connecting lugs are equal. When the first stator assembly, the second stator assembly and the rotor assembly are connected, the positions of the multiple first connecting lugs, the multiple second connecting lugs, the multiple third connecting lugs and the multiple fourth connecting lugs correspond one-to-one.

[0026] The present invention also provides an automobile, including the aforementioned dual-drive motor active oil-gas separator.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] (1) The present invention provides a dual-drive motor active oil-gas separator that integrates the oil-gas separation structure with the rotor and directly uses the rotor as the oil-gas separation structure. This not only achieves efficient oil-gas separation, but also does not increase the space occupied by the entire oil-gas separator in the crankcase, thus avoiding the expansion of the crankcase volume.

[0029] (2) The first mounting cavity and the second mounting cavity are set as a sealed structure, and the first mounting cavity and the second mounting cavity are not connected to the oil-gas separation cavity, thereby preventing the oil-gas mixture or oil in the oil-gas separation cavity from flowing into the first mounting cavity and the second mounting cavity, thereby ensuring that the first mounting cavity and the second mounting cavity are clean and tidy, preventing the oil-gas mixture or oil from adhering to the surface of the stator assembly, and improving the reliability of the stator assembly.

[0030] (3) The oil-gas separator is designed as a modular structure. Firstly, this means that the entire oil-gas separator can be decomposed into multiple independent modules. When a module malfunctions and needs repair or replacement, there is no need to disassemble and inspect the entire structure extensively, greatly simplifying the maintenance process and reducing repair time. Secondly, the modular structure allows each module to be shared and reused, thereby reducing development time and costs and helping to shorten the production cycle. Thirdly, since each module is relatively independent, it can be tested and verified separately during the design phase. Even if one module malfunctions, it will not affect other modules, thus reducing the risk of overall project failure.

[0031] (4) The first control unit and the second control unit are independent of each other and do not interfere with each other. On the one hand, the user can selectively open the first stator assembly or the second stator assembly according to the amount of oil-gas mixture, or open the first stator assembly and the second stator assembly simultaneously, so that the oil-gas separator has more selectable modes. On the other hand, when one of the first control unit or the second control unit fails, the other can still work normally, ensuring the continuity of oil-gas separation and improving the reliability of oil-gas separation.

[0032] (5) The positions of multiple first stator windings correspond one-to-one with the positions of multiple second stator windings, and the positions of the first magnets and second magnets with the same polarity on the rotor correspond one-to-one. When the first stator assembly and the second stator assembly are energized at the same time, the first magnetic field formed by the first stator assembly and the second magnetic field formed by the second stator assembly achieve complete superposition of magnetic fields, thereby increasing the output power of the rotor and thus improving the efficiency and effect of oil-gas separation.

[0033] (6) The two preset phase differences are equal in value and in the same direction, so as to ensure that when the first stator assembly and the second stator assembly are energized at the same time, both sides of the rotor axis can move synchronously at the same time, thus ensuring the reliability of oil-gas separation.

[0034] (7) The magnet embedded in the groove is flush with the mounting plane on the rotor. On the one hand, it can reduce the air resistance of the rotor when it rotates, thereby reducing noise. On the other hand, it can increase the overall structural strength of the rotor and reduce the stress concentration problem caused by the high speed of the rotor. On the third hand, it can make the magnetic field distribution more uniform, thereby improving the overall efficiency and performance of the oil-gas separator. The uniform magnetic field helps to improve the torque output characteristics, reduce fluctuations, and provide a more stable power output.

[0035] (8) S-shaped blades help to make the fluid flowing into and out of the impeller assembly smoother and more uniform, reducing the formation of turbulence and vortices. This not only improves the operating efficiency of the equipment, but also extends the service life of the equipment and reduces the impact and wear on the impeller assembly. In addition, S-shaped blades can provide a smoother fluid channel, reducing vibration and noise caused by irregular flow. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of a dual-drive motor active oil-gas separator according to the present invention.

[0037] Figure 2 This is a structural schematic diagram of a dual-drive motor active oil-gas separator according to another perspective of the present invention.

[0038] Figure 3 yes Figure 2 The oil-gas separator shown is a cross-sectional view along section line AA.

[0039] Figure 4 This is a schematic diagram of the impeller body in a preferred embodiment of the present invention.

[0040] Figure 5 This is a structural schematic diagram of the impeller body from another perspective in a preferred embodiment of the present invention.

[0041] Figure 6 yes Figure 5 The impeller body shown is a cross-sectional view along the BB section line.

[0042] Figure 7 This is a partial structural schematic diagram of the stator assembly of the present invention.

[0043] In the picture,

[0044] 100. First stator assembly; 110. First stator housing; 111. First mounting cavity; 112. First connecting lug; 120. First stator assembly; 121. First electronic control PCB board; 122. First power and signal connection port; 123. First stator core; 124. First stator winding;

[0045] 200. Second stator assembly; 210. Second stator housing; 211. Second mounting cavity; 212. Second connecting lug; 220. Second stator assembly; 221. Second electronic control PCB board; 222. Second power and signal wiring port; 223. Second stator core; 224. Second stator winding;

[0046] 300. Rotor assembly; 310. Rotor housing; 311. Oil-gas separation chamber; 312. Oil-gas inlet; 313. Gas outlet; 314. Liquid outlet; 315. Third connecting lug; 316. Fourth connecting lug; 317. Connecting shaft; 318. Bearing; 320. First magnet; 330. Second magnet; 340. Impeller assembly; 341. Impeller body; 3411. First mounting plane; 3412. Second mounting plane; 3413. First groove; 3414. Second groove; 342. Blade. Detailed Implementation

[0047] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0049] like Figures 1 to 7 As shown, the present invention provides a dual-drive motor active oil-gas separator, which is horizontally placed inside the engine crankcase, and includes:

[0050] A first stator assembly 100, a second stator assembly 200, and a rotor assembly 300 are provided, with the rotor assembly 300 sandwiched between the first stator assembly 100 and the second stator assembly 200. The axes of the first stator assembly 100, the second stator assembly 200, and the rotor assembly 300 are collinear. The rotor assembly 300 includes:

[0051] The rotor housing 310 is provided, and an oil-gas separation chamber 311 is provided inside the rotor housing 310. The oil-gas separation chamber 311 has an oil-gas inlet 312 for the oil-gas mixture to enter, an outlet 313 for the air to be discharged after oil-gas separation, and an outlet 314 for the oil to be discharged after oil-gas separation on the chamber wall.

[0052] The rotor is rotatably disposed in the oil-gas separation chamber 311, and there is a gap between the rotor and the chamber wall of the oil-gas separation chamber 311. A first magnet is disposed on the side of the rotor facing the first stator assembly 100, and a second magnet is disposed on the side of the rotor facing the second stator assembly 200. When the first stator assembly 100 and the second stator assembly 200 are energized at the same time, a first magnetic field and a second magnetic field are generated respectively. The magnetic field directions of the first magnetic field and the second magnetic field are parallel to the axial direction of the rotor. Through the cooperation between the first magnetic field and the first magnet, and the second magnetic field and the second magnet, the rotor is driven to rotate synchronously and in the same direction on both sides of the axial direction in the oil-gas separation chamber 311.

[0053] The present invention provides a dual-drive motor active oil-gas separator that integrates the oil-gas separation structure with the rotor, directly using the rotor as the oil-gas separation structure. This not only achieves efficient oil-gas separation, but also does not increase the space occupied by the entire oil-gas separator in the crankcase, thus avoiding the expansion of the crankcase volume.

[0054] It is further pointed out that the oil and gas inlet 312 and the outlet 313 are set on the same side, and the liquid outlet 314 is set on the opposite side of the oil and gas inlet 312 or the outlet 313.

[0055] Preferably, the first stator assembly 100 includes a first stator housing 110 and a first mounting cavity 111 is provided inside the first stator housing 110. The second stator assembly 200 includes a second stator housing 210 and a second mounting cavity 211 is provided inside the second stator housing 210. Both the first mounting cavity 111 and the second mounting cavity 211 are sealed cavities. The first mounting cavity 111, the second mounting cavity 211 and the oil-gas separation cavity 311 are not interconnected.

[0056] In this embodiment, the oil-gas separation chamber 311 is a chamber in which the oil-gas mixture is introduced and separated from the gas by centrifugation under the action of the rotor. Therefore, the oil-gas separation chamber 311 will be filled with the oil-gas mixture, and residual oil will be attached to the chamber wall. The first mounting chamber 111 and the second mounting chamber 211 are set as a sealed structure, and neither the first mounting chamber 111 nor the second mounting chamber 211 is connected to the oil-gas separation chamber 311. This prevents the oil-gas mixture or oil in the oil-gas separation chamber 311 from flowing into the first mounting chamber 111 and the second mounting chamber 211, thereby ensuring that the first mounting chamber 111 and the second mounting chamber 211 are clean and tidy, and preventing the oil-gas mixture or oil from adhering to the surface of the stator assembly, thus improving the reliability of the stator assembly.

[0057] Preferably, the first stator assembly 100 includes a first stator component 120, with a portion of the first stator component 120 located within the first mounting cavity 111 and another portion located outside the first mounting cavity 111; the second stator assembly 200 includes a second stator component 220, with a portion of the second stator component 220 located within the second mounting cavity 211 and another portion located outside the second mounting cavity 211, wherein the first stator housing 110 and the rotor housing 310 are detachably connected by fasteners, and the second stator housing 210 and the rotor housing 310 are detachably connected by fasteners, wherein the first stator assembly 100 and the second stator assembly 200 can be interchangeably mounted on either side of the rotor assembly 300 along the axial direction.

[0058] In this embodiment, since the first stator assembly 120 and the second stator assembly 220 are integrated and installed on the first stator housing 110 and the second stator housing 210 respectively, the first stator assembly 100 and the second stator assembly 200 form a modular structure. The rotor is installed inside the rotor housing 310, and the oil and gas inlet 312, the gas outlet 313, and the liquid outlet 314 are all located on the rotor housing 310 and connected to the oil and gas separation chamber 311 inside the rotor housing 310, so that the entire rotor assembly 300 also forms a modular structure. Setting the oil and gas separator as a modular structure has several advantages: First, it means that the entire oil and gas separator can be decomposed into multiple independent modules. When a module malfunctions and needs repair or replacement, there is no need for extensive disassembly and inspection of the entire structure, greatly simplifying the maintenance process and reducing repair time. Second, the modular structure allows each module to be shared and reused, thereby reducing development time and costs and helping to shorten the production cycle. Third, since each module is relatively independent, it can be tested and verified separately during the design phase. Even if one module has a problem, it will not affect other modules, thus reducing the risk of overall project failure.

[0059] It is worth mentioning that the first stator assembly 100 and the second stator assembly 200 have the same structure. Therefore, the installation positions of the first stator assembly 100 and the second stator assembly 200 can be interchanged without affecting the operation of the entire oil-gas separator, thus realizing the foolproof setting of the entire oil-gas separator during assembly.

[0060] Preferably, the first stator assembly 120 includes a first electronic control PCB board 121 and a first power and signal connector 122 electrically connected to the first electronic control PCB board 121, wherein the first electronic control PCB board 121 is located inside the first mounting cavity 111 and the first power and signal connector 122 is located outside the first mounting cavity 111; the second stator assembly 220 includes a second electronic control PCB board 221 and a second power and signal connector 222 electrically connected to the second electronic control PCB board 221, wherein the second electronic control PCB board 221 is located inside the second mounting cavity 211 and the second power and signal connector 222 is located outside the second mounting cavity 211, wherein the first electronic control PCB board 121 and the first power and signal connector 122 constitute the first control unit in the first stator assembly 100, and the second electronic control PCB board 221 and the second power and signal connector 222 constitute the second control unit in the second stator assembly 200, wherein the first control unit and the second control unit are independently configured.

[0061] In this embodiment, the first control unit and the second control unit are independent of each other and do not interfere with each other. On the one hand, the user can selectively turn on the first stator assembly 100 or the second stator assembly 200 according to the amount of oil-gas mixture, or simultaneously turn on the first stator assembly 100 and the second stator assembly 200, so that the oil-gas separator has more selectable modes. On the other hand, when one of the first control unit or the second control unit fails, the other can still work normally, ensuring the continuity of oil-gas separation and improving the reliability of oil-gas separation.

[0062] Preferably, the first stator assembly 120 includes a first stator core 123 formed by stacking silicon steel sheets and a first stator winding 124 wound on the silicon steel sheets, and there are multiple first stator windings 124 arranged in a ring; the second stator assembly 220 includes a second stator core 223 formed by stacking silicon steel sheets and a second stator winding 224 wound on the silicon steel sheets, and there are multiple second stator windings 224 arranged in a ring, wherein the number of first stator windings 124 is the same as the number of second stator windings 224, and the positions of the multiple first stator windings 124 correspond one-to-one with the positions of the multiple second stator windings 224.

[0063] It is worth mentioning that the first stator core 123 and the first stator winding 124 form the first stator, and the second stator core 223 and the second stator winding 224 form the second stator.

[0064] Furthermore, the first magnet includes a plurality of first magnets 320, a portion of which have an N pole facing the side of the first stator assembly 100, and another portion have an S pole facing the side of the first stator assembly 100. The N-pole first magnets 320 and the S-pole first magnets 320 are spaced apart. The second magnet includes a plurality of second magnets 330, a portion of which have an N pole facing the side of the second stator assembly 200, and another portion have an S pole facing the side of the first stator assembly 100. Some of the second magnets 330 have an S pole on the side facing the second stator assembly 200, and second magnets 330 with an N pole on the side facing the second stator assembly 200 are spaced apart from the second magnets 330 with an S pole. Specifically, the positions of the first magnets 320 with an N pole facing the first stator assembly 100 correspond to the positions of the second magnets 330 with an N pole facing the second stator assembly 200, and the positions of the first magnets 320 with an S pole facing the first stator assembly 100 correspond to the positions of the second magnets 330 with an S pole facing the second stator assembly 200. That is, the positions of the first magnets 320 and second magnets 330 with the same polarity correspond one-to-one.

[0065] In this embodiment, the positions of multiple first stator windings 124 correspond one-to-one with the positions of multiple second stator windings 224, and the positions of the first magnets and second magnets 330 with the same polarity on the rotor correspond one-to-one. When the first stator assembly 100 and the second stator assembly 200 are energized at the same time, the first magnetic field formed by the first stator assembly 100 and the second magnetic field formed by the second stator assembly 200 achieve complete superposition of magnetic fields, thereby increasing the output power of the rotor and improving the efficiency and effect of oil-gas separation.

[0066] It is worth mentioning that when current flows through the stator windings, a magnetic field is generated around the stator windings according to Ampere's law. This magnetic field is generated by the current flowing through the conductor, and its strength and direction are related to the magnitude and direction of the current flowing through the stator windings. The stator core is made of silicon steel sheets (a material with high magnetic permeability), which not only helps to enhance the magnetic field generated by the stator winding current, but also provides a low-resistance path for the magnetic field lines to pass through. This effectively guides the magnetic field to the rotor, achieving efficient energy conversion.

[0067] More preferably, a first preset phase difference is formed between the first stator winding 124 and the first magnet 320, and a second preset phase difference is formed between the second stator winding 224 and the second magnet 330, wherein the first preset phase difference and the second preset phase difference have the same value and the same direction.

[0068] In this embodiment, the two preset phase differences are equal in value and in the same direction, thereby ensuring that when the first stator assembly 100 and the second stator assembly 200 are energized at the same time, both sides of the rotor axis can move synchronously at the same time, ensuring the reliability of oil-gas separation.

[0069] More preferably, the rotor includes a first mounting plane 3411 facing the first stator assembly 100 and a second mounting plane 3412 facing the second stator assembly 200. A first groove 3413 for embedding a first magnet 320 is provided on the first mounting plane 3411, and a second groove 3414 for embedding a second magnet 330 is provided on the second mounting plane 3412. The opening direction of the first groove 3413 is opposite to the opening direction of the second groove 3414. The groove depth of the first groove 3413 is equal to the thickness of the first magnet 320, and the groove depth of the second groove 3414 is equal to the thickness of the second magnet 330.

[0070] In this embodiment, the magnet embedded in the groove is flush with the mounting plane on the rotor. This reduces air resistance during rotor rotation, thereby reducing noise. It also increases the overall structural robustness of the rotor, reducing stress concentration caused by high-speed rotor rotation. Furthermore, it makes the magnetic field distribution more uniform, thereby improving the overall efficiency and performance of the oil-gas separator. A uniform magnetic field helps improve torque output characteristics, reduce fluctuations, and provide a more stable power output.

[0071] More preferably, the rotor is an impeller assembly 340, which includes an impeller body 341 and blades 342 distributed annularly on the side of the impeller body 341, and a first magnet and a second magnet are mounted on the impeller body 341, wherein the impeller body 341 and the blades 342 are integrally injection molded.

[0072] It is worth mentioning that when manufacturing the impeller assembly 340, the first magnet and the second magnet are first placed in the injection cavity of the injection molding equipment according to the preset orientation. Then, the injection molding material is injected into the injection cavity. After the injection molding material cools, the impeller assembly 340 is formed. Therefore, the impeller body 341, blades 342, and the first and second magnets in the impeller assembly 340 are integrally formed and do not require assembly.

[0073] More preferably, the blade 342 is arranged in an inclined S-shape, wherein the degree of curvature of the blade 342 toward the first stator assembly 100 is the same as the degree of curvature of the blade 342 toward the second stator assembly 200, and the two curvature directions are opposite.

[0074] In this embodiment, the S-shaped blades 342 help to make the fluid flowing into and out of the impeller assembly 340 smoother and more uniform, reducing the formation of turbulence and vortices. This not only improves the operating efficiency of the equipment but also extends its service life and reduces the impact and wear on the impeller assembly 340. In addition, the S-shaped blades 342 can provide a smoother fluid path, reducing vibration and noise caused by irregular flow.

[0075] Furthermore, since the degree of curvature of the blade 342 toward the first stator assembly 100 is the same as the degree of curvature of the blade 342 toward the second stator assembly 200, and the two curvature directions are opposite, the oil-gas separation effect achieved by the first stator assembly 100 and the second stator assembly 200 is consistent regardless of which side of the rotor assembly 300 they are installed on, thereby improving the efficiency of the oil-gas separator assembly.

[0076] Preferably, the first stator housing 110 is provided with a plurality of first connecting lugs 112, the second stator housing 210 is provided with a plurality of second connecting lugs 212, and the rotor housing 310 is provided with a plurality of third connecting lugs 315 and a plurality of fourth connecting lugs 316 at both ends along the axial direction. When the first stator assembly 100 is connected to the rotor assembly 300, the positions of the plurality of first connecting lugs 112 correspond one-to-one with the positions of the plurality of third connecting lugs 315; when the second stator assembly 200 is connected to the rotor assembly 300, the positions of the plurality of second connecting lugs 212 correspond one-to-one with the positions of the plurality of fourth connecting lugs 316.

[0077] It is further pointed out that the number of first connecting lugs 112, second connecting lugs 212, third connecting lugs 315 and fourth connecting lugs 316 are equal. When the first stator assembly 100, the second stator assembly 200 and the rotor assembly 300 are connected, the positions of the multiple first connecting lugs 112, the multiple second connecting lugs 212, the multiple third connecting lugs 315 and the multiple fourth connecting lugs 316 correspond one-to-one.

[0078] In this embodiment, the positions of multiple first connecting lugs 112, multiple second connecting lugs 212, multiple third connecting lugs 315, and multiple fourth connecting lugs 316 are matched one-to-one. This is also to facilitate the connection between the first stator assembly 100, the second stator assembly 200, and the rotor assembly 300, improve assembly efficiency, and achieve foolproof assembly.

[0079] Preferably, the oil-gas separation chamber 311 is provided with a connecting shaft 317 on each side along the axial direction of the rotor assembly 300, and a bearing 318 is nested on the connecting shaft 317. The two ends of the impeller body 341 along the axial direction are respectively nested and cooperated with the bearing 318 on the corresponding side connecting shaft 317.

[0080] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0082] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A dual-drive motor active oil-gas separator, characterized in that, It is placed horizontally inside the engine crankcase, including: A first stator assembly, a second stator assembly, and a rotor assembly, wherein the rotor assembly is sandwiched between the first stator assembly and the second stator assembly, and the axes of the first stator assembly, the second stator assembly, and the rotor assembly are collinear, wherein the rotor assembly includes: The rotor housing has an oil-gas separation chamber inside it. The oil-gas separation chamber has an oil-gas inlet for the oil-gas mixture to enter, an air outlet for the air to be discharged after oil-gas separation, and an oil outlet for the oil to be discharged after oil-gas separation on the chamber wall. An impeller assembly is rotatably disposed within the oil-gas separation chamber, with a gap between the impeller assembly and the chamber wall. A first magnet is disposed on the side of the impeller assembly facing the first stator assembly, and a second magnet is disposed on the side of the impeller assembly facing the second stator assembly. When the first stator assembly and the second stator assembly are simultaneously energized, a first magnetic field and a second magnetic field are generated respectively. The magnetic field directions of the first magnetic field and the second magnetic field are parallel to the axial direction of the impeller assembly. Through the cooperation between the first magnetic field and the first magnet, and the second magnetic field and the second magnet, the two ends of the impeller assembly along the axial direction are driven to rotate synchronously and in the same direction within the oil-gas separation chamber. The impeller assembly includes an impeller body and blades distributed in annularly on the side of the impeller body, and the first magnet and the second magnet are mounted on the impeller body, wherein the impeller body and the blades are integrally injection molded; The blades are arranged in an inclined S-shape, wherein the degree of curvature of the blades toward the first stator assembly is the same as the degree of curvature of the blades toward the second stator assembly, and the two curvature directions are opposite.

2. The dual-drive motor active oil-gas separator according to claim 1, characterized in that, The first stator assembly includes a first stator housing and a first mounting cavity is provided inside the first stator housing. The second stator assembly includes a second stator housing and a second mounting cavity is provided inside the second stator housing. Both the first mounting cavity and the second mounting cavity are sealed cavities. The first mounting cavity, the second mounting cavity, and the oil-gas separation cavity are not interconnected.

3. The dual-drive motor active oil-gas separator according to claim 2, characterized in that, The first stator assembly, the second stator assembly, and the rotor assembly are each modular in structure, and the first stator housing and the rotor housing are detachably connected by fasteners, and the second stator housing and the rotor housing are detachably connected by fasteners. The first stator assembly and the second stator assembly can be interchangeably installed at either end of the rotor assembly along the axial direction.

4. The dual-drive motor active oil-gas separator according to claim 1, characterized in that, The structure of the first stator assembly is the same as that of the second stator assembly.

5. The dual-drive motor active oil-gas separator according to claim 2, characterized in that, The first stator assembly includes a first stator component, with a portion of the first stator component located within the first mounting cavity and another portion of the first stator component located outside the first mounting cavity; the second stator assembly includes a second stator component, with a portion of the second stator component located within the second mounting cavity and another portion of the second stator component located outside the second mounting cavity.

6. The dual-drive motor active oil-gas separator according to claim 5, characterized in that, The first stator assembly includes a first control unit and a first stator electrically connected to the first control unit; the second stator assembly includes a second control unit and a second stator electrically connected to the second control unit, wherein the first control unit and the second control unit are independent of each other.

7. The dual-drive motor active oil-gas separator according to claim 6, characterized in that, The first control unit includes a first electronic control PCB board and a first power and signal connection port electrically connected to the first electronic control PCB board, wherein the first electronic control PCB board is located inside the first mounting cavity and the first power and signal connection port is located outside the first mounting cavity; the second control unit includes a second electronic control PCB board and a second power and signal connection port electrically connected to the second electronic control PCB board, wherein the second electronic control PCB board is located inside the second mounting cavity and the second power and signal connection port is located outside the second mounting cavity.

8. The dual-drive motor active oil-gas separator according to claim 6, characterized in that, The first stator includes a first stator core made of stacked silicon steel sheets and a first stator winding wound on the silicon steel sheets, and there are multiple first stator windings arranged in a ring; the second stator includes a second stator core made of stacked silicon steel sheets and a second stator winding wound on the silicon steel sheets, and there are multiple second stator windings arranged in a ring, wherein the number of first stator windings is the same as the number of second stator windings, and the positions of the multiple first stator windings correspond one-to-one with the positions of the multiple second stator windings.

9. The dual-drive motor active oil-gas separator according to claim 8, characterized in that, The first magnet includes a plurality of first magnets. A portion of the first magnets has an N pole on the side facing the first stator assembly, and another portion of the first magnets has an S pole on the side facing the first stator assembly. The first magnets with N poles facing the first stator assembly and the first magnets with S poles are arranged alternately. The second magnet includes a plurality of second magnets. A portion of the second magnets has an N pole facing the side of the second stator assembly, while another portion has an S pole facing the side of the second stator assembly. The second magnets with N poles facing the side of the second stator assembly and the second magnets with S poles facing the side of the second stator assembly are spaced apart. The positions of the first magnet with N poles facing the side of the first stator assembly and the second magnets with N poles facing the side of the second stator assembly correspond to each other, and the positions of the first magnet with S poles facing the side of the first stator assembly and the second magnets with S poles facing the side of the second stator assembly also correspond to each other.

10. The dual-drive motor active oil-gas separator according to claim 9, characterized in that, A first preset phase difference is formed between the first stator winding and the first magnet, and a second preset phase difference is formed between the second stator winding and the second magnet, wherein the first preset phase difference and the second preset phase difference have the same value and the same direction.

11. The dual-drive motor active oil-gas separator according to claim 9, characterized in that, The impeller assembly includes a first mounting plane facing the first stator assembly and a second mounting plane facing the second stator assembly. A first groove for embedding the first magnet is provided on the first mounting plane, and a second groove for embedding the second magnet is provided on the second mounting plane. The opening direction of the first groove is opposite to the opening direction of the second groove. The groove depth of the first groove is equal to the thickness of the first magnet, and the groove depth of the second groove is equal to the thickness of the second magnet.

12. The dual-drive motor active oil-gas separator according to claim 1, characterized in that, The oil-gas separation chamber is provided with a connecting shaft at each end along the axial direction of the rotor assembly, and a bearing is nested on the connecting shaft. The two ends of the impeller body along the axial direction are respectively nested and fitted with the bearings on the corresponding ends of the connecting shaft.

13. The dual-drive motor active oil-gas separator according to claim 2, characterized in that, The first stator housing is provided with a plurality of first connecting lugs, the second stator housing is provided with a plurality of second connecting lugs, and the rotor housing is provided with a plurality of third connecting lugs and a plurality of fourth connecting lugs at both ends along the axial direction. When the first stator assembly is connected to the rotor assembly, the positions of the plurality of first connecting lugs correspond one-to-one with the positions of the plurality of third connecting lugs; when the second stator assembly is connected to the rotor assembly, the positions of the plurality of second connecting lugs correspond one-to-one with the positions of the plurality of fourth connecting lugs.

14. The dual-drive motor active oil-gas separator according to claim 13, characterized in that, The number of the first connecting lug, the second connecting lug, the third connecting lug, and the fourth connecting lug are equal. When the first stator assembly, the second stator assembly, and the rotor assembly are connected, the positions of the multiple first connecting lugs, the multiple second connecting lugs, the multiple third connecting lugs, and the multiple fourth connecting lugs correspond one-to-one.

15. A car, characterized in that, Includes the dual-drive motor active oil-gas separator as described in any one of claims 1 to 14.

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