Electric drive axle oil-water composite cooling motor

Abstract

The utility model relates to electric drive bridge motor technology field, concretely relates to a kind of electric drive bridge oil-water composite cold motor, comprising: motor main body, including oil sump and base;The oil sump is equipped with oil outlet;The base is equipped with water inlet and water outlet;The water channel that is connected in the base inside water inlet and water outlet;It is equipped in the coarse filter, oil pump, filter and oil cooler of the radial side portion of motor main body and sequential butt joint;The coarse filter is butt joint with the oil outlet;The oil cooler is equipped with water inlet hole and water outlet hole;Water inlet pipe, butt joint with the water inlet;First water outlet pipe, butt joint with the water outlet in one end, butt joint with the water inlet hole in the other end;Second water outlet pipe, butt joint with the water outlet hole.The common implementation of the cooling setting and water cooling setting is guaranteed to the cooling effect of motor under various working conditions, and then the operating stability and service life of motor are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of electric drive bridge motor technology, specifically to an electric drive bridge oil-water hybrid cooling motor. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the heat dissipation performance of the electric drive axle motor has become a key factor affecting the power and reliability of the entire vehicle. If the heat generated by the motor cannot be dissipated in time, it will lead to decreased efficiency, shortened lifespan, and even safety hazards. Therefore, efficient cooling technology is of paramount importance. Currently, oil cooling and water cooling are the mainstream cooling methods for electric drive axle motors. In oil cooling, the cooling oil directly contacts the heat sources such as the windings and iron core, and this method is widely used in high-performance passenger vehicles. In water cooling, heat dissipation is achieved through cooling channels within the motor, utilizing heat exchange between water and the heat source, and this method is commonly used in pure electric drive systems.

[0003] Some electric drive bridge motors use both oil cooling and water cooling methods for cooling. While this can ensure the cooling effect of the electric drive bridge motor under different operating conditions, it also significantly increases the consumption of related energy.

[0004] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0005] The purpose of this invention is to provide an electric drive bridge oil-water hybrid cooling motor.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An oil-water hybrid refrigerated motor for electric drive bridges, comprising: The motor body includes an oil pan and a base; the oil pan is provided with an oil outlet; the base is provided with a water inlet and a water outlet; and the inner side of the base is provided with a water channel connecting the water inlet and the water outlet. A coarse filter, an oil pump, a fine filter, and an oil cooler are arranged on the radial side of the motor body and connected in sequence; the coarse filter is connected to the oil outlet on the oil pan; the oil cooler is provided with a water inlet and a water outlet. The water inlet pipe is connected to the water inlet. The first water outlet pipe has one end connected to the water outlet and the other end connected to the water inlet. The second water outlet pipe is connected to the water outlet hole.

[0007] The connection method in this embodiment is not limited, and includes, but is not limited to, threaded connection.

[0008] In the above scheme, the cooling oil entering the motor body is collected at the oil pan and enters the coarse filter through the oil outlet. It then sequentially passes through the oil pump, fine filter, and oil cooler before being returned to the motor body for cooling. The oil cooling system is existing and can be referenced from existing motor oil cooling implementation methods (see...). Figure 7 ).

[0009] During water cooling, cooling water enters the inlet through the inlet pipe, circulates within the machine base, and then enters the first outlet pipe through the outlet. Guided by the first outlet pipe, it then flows through the inlet hole into the oil cooler, and finally exits the oil cooler through the outlet hole. The layout of the water channels within the machine base and the oil cooler is not restricted here; any water cooling setup is acceptable.

[0010] The inlet pipe connects at one end to the vehicle's water circulation system, which is already in place and will not be described in detail here. Similarly, the second outlet pipe also connects at one end to the vehicle's water circulation system to circulate the cooling water.

[0011] In summary, the combined implementation of oil cooling and water cooling during motor operation ensures effective cooling under various operating conditions, thereby guaranteeing the motor's operational stability and service life. Simultaneously, during water cooling, the cooling water discharged from the motor housing re-enters the oil cooler, cooling the oil input into the oil cooler during the oil cooling process. This lowers the oil temperature, ensuring the effectiveness of the oil cooling method, improving the utilization rate of cooling water, and reducing the energy consumption for oil cooling.

[0012] In a further technical solution, the base includes an inner water jacket and an outer water jacket arranged sequentially from the inside to the outside. The surface of the inner water jacket facing the outer water jacket is provided with a spiral groove or a zigzag groove, and the spiral groove or the zigzag groove and the outer water jacket constitute the water channel.

[0013] Waterways can be spiral-shaped (e.g.) Figure 6 As shown), it can also be a zigzag waterway (such as...). Figure 5 (As shown).

[0014] Spiral-shaped channels facilitate the flow of cooling water. Specifically, the continuous rotating structure of the spiral channel reduces dead zones and local eddies, thereby lowering flow resistance. Simultaneously, the spiral channel ensures a longer water flow path, ultimately guaranteeing effective water cooling.

[0015] In a further technical solution, the fine filter is connected to the oil cooler via an oil delivery pipe; Along the circumference of the motor body, the fine filter is located between the oil cooler and the oil pump.

[0016] Preferably, the diameter of the oil pipeline is ≥12mm.

[0017] The existing configuration of the fine filter, oil pipeline and oil cooler is designed to supply oil to the oil cooler and is well known to those skilled in the art, so it will not be described in detail here.

[0018] Along the circumference of the motor body, the fine filter is located between the oil cooler and the oil pump. Based on this, the length of the oil delivery pipe is relatively small, and the oil delivery efficiency is relatively high.

[0019] In a further technical solution, along the circumference of the motor body, the water inlet pipe is located between the fine filter and the oil cooler; The water outlet on the base is located on the side of the oil cooler.

[0020] Based on the configuration of this embodiment, the inlet and outlet are relatively close in circumferential distance along the motor body, which further ensures a longer water flow path, thereby ensuring the water cooling effect.

[0021] In some implementations, the water inlet pipe may not be located between the fine filter and the oil cooler along the circumference of the motor body.

[0022] A further technical solution involves positioning the water inlet and outlet at opposite ends of the motor base along the axial direction of the motor body, with the oil delivery pipe positioned between the water inlet and outlet. This arrangement avoids interference between the water inlet pipe, the first water outlet pipe, and the oil delivery pipe, and particularly facilitates the straight-line extension of the oil delivery pipe to ensure efficient oil delivery.

[0023] A further technical solution involves arranging the coarse filter and the oil pump side-by-side (i.e., at 180° angles) along the axial direction of the motor body. This arrangement eliminates the need to disassemble the oil pump when removing the coarse filter, improving the ease of motor assembly and disassembly.

[0024] A further technical solution is that, along the axial direction of the motor body, the two ends of the base protrude relative to the coarse filter and the oil pump, so as to avoid increasing the axial dimension of the motor due to the coarse filter and the oil pump being arranged side by side.

[0025] The motor body may include a front cover and a rear cover, both of which protrude along the axial direction of the motor body relative to the coarse filter and the oil pump.

[0026] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0027] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0028] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0029] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0030] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0031] The working principle and advantages of this utility model are as follows: The cooling oil that enters the motor body falls back and collects at the oil pan, then enters the coarse filter through the oil outlet, and then passes through the oil pump, fine filter and oil cooler in sequence before being sent back into the motor body for cooling.

[0032] During the water cooling process, cooling water enters the inlet through the inlet pipe, circulates within the machine base, enters the first outlet pipe through the outlet, and then enters the oil cooler through the inlet hole guided by the first outlet pipe. Finally, it is discharged from the oil cooler through the outlet hole.

[0033] In summary, the combined implementation of oil cooling and water cooling during motor operation ensures effective cooling under various operating conditions, thereby guaranteeing the motor's operational stability and service life. Simultaneously, during water cooling, the cooling water discharged from the motor housing re-enters the oil cooler, cooling the oil input into the oil cooler during the oil cooling process. This lowers the oil temperature, ensuring the effectiveness of the oil cooling method, improving the utilization rate of cooling water, and reducing the energy consumption for oil cooling. Attached Figure Description

[0034] Figure 1 This is one of the structural schematic diagrams of the electric drive bridge oil-water hybrid chiller according to an embodiment of this utility model; Figure 2 This is the second schematic diagram of the structure of the electric drive bridge oil-water hybrid cooling motor according to an embodiment of this utility model; Figure 3 This is the third structural schematic diagram of the electric drive bridge oil-water hybrid cooling motor of this utility model embodiment (partial structural cross-section). Figure 4 This is the fourth structural schematic diagram of the electric drive bridge oil-water composite cooling motor of this utility model embodiment (partial structural cross-section). Figure 5This is a schematic diagram of the flow path of cooling water in the zigzag waterway according to an embodiment of the present invention; Figure 6 This is a partial structural diagram of the spiral groove in an embodiment of the present invention; Figure 7 This is a schematic diagram of the cooling oil flow path in the prior art.

[0035] In the attached diagrams: 1. Motor body; 11. Oil pan; 111. Oil outlet; 12. Base; 121. Water channel; 122. Spiral groove; 2. Coarse filter; 3. Oil pump; 4. Fine filter; 5. Oil cooler; 6. Water inlet pipe; 7. First water outlet pipe; 8. Second water outlet pipe; 9. Oil delivery pipe. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0037] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0038] See Figures 1-6 An electric drive bridge oil-water hybrid refrigerated motor, comprising: The motor body 1 includes an oil pan 11 and a base 12; the oil pan 11 is provided with an oil outlet 111; the base 12 is provided with a water inlet (not shown in the figure) and a water outlet (not shown in the figure); the inner side of the base 12 is provided with a water channel 121 connecting the water inlet and the water outlet; A coarse filter 2, an oil pump 3, a fine filter 4, and an oil cooler 5 are arranged on the radial side of the motor body 1 and connected in sequence; the coarse filter 2 is connected to the oil outlet 111 on the oil pan 11; the oil cooler 5 is provided with a water inlet (not shown in the figure) and a water outlet (not shown in the figure). Water inlet pipe 6 is connected to the water inlet; The first water outlet pipe 7 has one end connected to the water outlet and the other end connected to the water inlet. The second water outlet pipe 8 is connected to the water outlet hole.

[0039] The docking method in this embodiment is not limited, and includes, but is not limited to, threaded connection.

[0040] The cooling oil entering the motor body 1 flows back and collects at the oil pan 11, then enters the coarse filter 2 through the oil outlet 111. It then sequentially passes through the oil pump 3, fine filter 4, and oil cooler 5 before being returned to the motor body 1 for cooling. The oil cooling system is existing and can be referenced from existing motor oil cooling implementation methods (see...). Figure 7 ).

[0041] During water cooling, cooling water enters the inlet through the inlet pipe 6, circulates within the base 12, and then enters the first outlet pipe 7 through the outlet. Guided by the first outlet pipe 7, it then enters the oil cooler 5 through the inlet hole, and finally exits the oil cooler 5 through the outlet hole. The layout of the water channels 121 within the base 12 and the oil cooler 5 is not restricted here; any water cooling setup is acceptable.

[0042] For the inlet pipe 6, one end can connect to the water circulation pipe on the vehicle, which is already in place and will not be described in detail here. For the second outlet pipe 8, one end can also connect to the water circulation pipe on the vehicle to realize the circulation of cooling water.

[0043] In summary, during motor operation, the combined implementation of oil cooling and water cooling systems ensures effective cooling under various operating conditions, thereby guaranteeing the motor's operational stability and service life. Simultaneously, during water cooling, the cooling water discharged from the base 12 re-enters the oil cooler 5, cooling the oil input into the oil cooler 5. This reduces the oil temperature, ensuring the effectiveness of the oil cooling method, improving the utilization rate of cooling water, and reducing the energy consumption for oil cooling.

[0044] It should be noted that the cooling of the motor's internal structure during oil cooling is based on existing methods, and supplementary explanations are provided here to aid understanding: In some existing technologies, cooling oil enters the rotor from the rear end cover of the motor (i.e., the non-output end of the rotor). After passing through the hollow motor shaft, the cooling oil is divided into two paths to provide cooling for the stator and rotor. One path of oil is sprayed out through the radial holes on the motor shaft to cool the inner side of the windings at both ends of the stator. The other path of oil enters the rotor core from the middle part of the rotor core and then flows to the output end and non-output end of the rotor, respectively. During this process, the rotor core and magnets are cooled. Then, the oil is sprayed out from the oblique holes on the end faces of the rotor end plates located at the output end and non-output end of the rotor to cool the inner side of the windings at both ends of the stator again. See Figure 7In another part of the existing technology, the oil in the oil pan 11 is filtered by the coarse filter 2 and then sucked into the oil pump 3. The oil pumped out by the oil pump 3 is filtered by the fine filter 4 and cooled by the oil cooler 5. Then the oil is divided into two parts in a ratio of about 5:1. Most of the oil enters the stator cooling oil circuit and is then sprayed down from the front oil ring and the rear oil ring to cool the windings at both ends of the stator. A small amount of oil enters the rotor cooling oil circuit, cools the rotor core and magnets, and is then sprayed out from the rotor end plate to cool the inner side of the windings at both ends of the stator. Finally, the cooled oil flows back to the oil pan 11 by gravity for the next round of cooling.

[0045] To highlight the advantages of implementing both oil cooling and water cooling systems, the following points should be added: Currently, most systems only use oil cooling, which provides cooling to the inner sides of the stator windings at both ends by radially throwing oil from the rotor. However, the flow rate of the cooling oil is limited, resulting in low efficiency. If the oil pump speed is low or the rotor speed is high, tests show that the flow rate of the cooling oil ejected through the rotor's radial oil holes will be further reduced, further decreasing the cooling efficiency. This is detrimental to motor temperature control and does not help to improve the motor's power density. The simultaneous use of water cooling avoids this problem.

[0046] See Figure 5 , Figure 6 In this embodiment, the base 12 includes an inner water jacket (not shown in the figure) and an outer water jacket (not shown in the figure) arranged sequentially from the inside to the outside. The inner water jacket has a spiral groove 122 or a zigzag groove on its surface facing the outer water jacket. The spiral groove 122 or the zigzag groove and the outer water jacket constitute the water channel 121.

[0047] Waterway 121 can be a spiral waterway (e.g.) Figure 6 As shown), it can also be a zigzag waterway (such as...). Figure 5 (As shown).

[0048] The spiral groove 122 facilitates the flow of cooling water. Specifically, through its continuous rotating structure, the spiral groove 122 reduces dead zones and local eddies, thereby lowering flow resistance. Simultaneously, the spiral groove 122 ensures a longer water flow path, ultimately guaranteeing effective water cooling.

[0049] See Figure 1 In this embodiment, the fine filter 4 is connected to the oil cooler 5 via the oil supply pipe 9; Along the circumference of the motor body 1, the fine filter 4 is located between the oil cooler 5 and the oil pump 3.

[0050] Preferably, the diameter of the oil pipeline 9 is ≥12mm.

[0051] The existing configuration of the fine filter 4, the oil supply pipe 9 and the oil cooler 5 is for the purpose of supplying oil to the oil cooler 5, which is well known to those skilled in the art and will not be described in detail here.

[0052] Along the circumference of the motor body 1, the fine filter 4 is located between the oil cooler 5 and the oil pump 3. Based on this, the length of the oil pipe 9 is relatively small, and the oil delivery efficiency is relatively high.

[0053] See Figure 1 In this embodiment, along the circumference of the motor body 1, the water inlet pipe 6 is located between the fine filter 4 and the oil cooler 5; The water outlet is located on the side of the oil cooler 5.

[0054] Based on the configuration of this embodiment, the inlet and outlet are relatively close in the circumferential distance along the motor body 1, which further ensures a longer water flow path and thus guarantees the water cooling effect.

[0055] In some embodiments, the water inlet pipe 6 may not be located between the fine filter 4 and the oil cooler 5 along the circumference of the motor body 1.

[0056] See Figure 1 In this embodiment, along the axial direction of the motor body 1, the water inlet and the water outlet are located at opposite ends of the base 12, and the oil delivery pipe 9 is located between the water inlet and the water outlet. This arrangement avoids interference between the water inlet pipe 6, the first water outlet pipe 7, and the oil delivery pipe 9, and in particular, facilitates the straight extension of the oil delivery pipe 9 to ensure oil delivery efficiency.

[0057] See Figure 1 , Figure 4 In this embodiment, the coarse filter 2 and the oil pump 3 are arranged side by side, one after the other, along the axial direction of the motor body 1. This arrangement eliminates the need to disassemble the oil pump 3 when removing the coarse filter 2, thus improving the ease of motor assembly and disassembly.

[0058] See Figure 4 In this embodiment, along the axial direction of the motor body 1, the two ends of the base 12 protrude relative to the coarse filter 2 and the oil pump 3, so as to avoid the increase in the axial dimension of the motor caused by the coarse filter 2 and the oil pump 3 being arranged side by side.

[0059] The motor body 1 may include a front cover and a rear cover. Along the axial direction of the motor body 1, the front cover and the rear cover are both protruding relative to the coarse filter 2 and the oil pump 3.

[0060] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An electric drive bridge oil-water hybrid cooled motor, characterized in that: include: The motor body (1) includes an oil pan (11) and a base (12); the oil pan (11) is provided with an oil outlet (111); the base (12) is provided with a water inlet and a water outlet; the inner side of the base (12) is provided with a water channel (121) connecting the water inlet and the water outlet. A coarse filter (2), an oil pump (3), a fine filter (4), and an oil cooler (5) are arranged on the radial side of the motor body (1) and connected in sequence; the coarse filter (2) is connected to the oil outlet (111) on the oil pan (11); the oil cooler (5) is provided with a water inlet and a water outlet. The water inlet pipe (6) is connected to the water inlet. The first water outlet pipe (7) has one end connected to the water outlet and the other end connected to the water inlet; The second water outlet pipe (8) is connected to the water outlet hole.

2. The electric drive bridge oil-water hybrid cooled motor according to claim 1, characterized in that: The base (12) includes an inner water jacket and an outer water jacket arranged sequentially from the inside to the outside. The surface of the inner water jacket facing the outer water jacket is provided with a spiral groove (122) or a zigzag groove. The spiral groove (122) or the zigzag groove and the outer water jacket constitute the water channel (121).

3. The electric drive bridge oil-water hybrid cooled motor according to claim 1, characterized in that: The fine filter (4) is connected to the oil cooler (5) via the oil supply pipe (9); Along the circumference of the motor body (1), the fine filter (4) is located between the oil cooler (5) and the oil pump (3).

4. The electric drive bridge oil-water hybrid cooled motor according to claim 3, characterized in that: Along the circumference of the motor body (1), the water inlet pipe (6) is located between the fine filter (4) and the oil cooler (5); The water outlet is located on the side of the oil cooler (5).

5. The electric drive bridge oil-water hybrid cooled motor according to claim 3, characterized in that: Along the axial direction of the motor body (1), the water inlet and the water outlet are located at the two ends of the base (12), and the oil pipe (9) is located between the water inlet and the water outlet.

6. An electric drive bridge oil-water hybrid cooled motor according to any one of claims 1-5, characterized in that: Along the axial direction of the motor body (1), the coarse filter (2) and the oil pump (3) are arranged side by side.

7. The electric drive bridge oil-water hybrid cooled motor according to claim 6, characterized in that: Along the axial direction of the motor body (1), the two ends of the base (12) protrude relative to the coarse filter (2) and the oil pump (3).

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