Rotor assembly and motor

Abstract

The invention belongs to the technical field of motors, and discloses a rotor assembly and a motor, the rotor assembly comprises a rotating shaft, a plurality of iron cores and magnetic steel, the rotating shaft is provided with a liquid storage cavity and a liquid outlet channel communicated with the liquid storage cavity, the plurality of iron cores sleeve the rotating shaft and are sequentially arranged side by side, and the inner wall of each iron core is provided with a circulation groove; first circulation holes are formed between the circulation grooves and the outer wall of the rotating shaft, second circulation holes and mounting holes are formed in the iron cores, the first circulation holes in the multiple iron cores are sequentially communicated to form a first circulation channel, the second circulation holes in the multiple iron cores are sequentially communicated to form a second circulation channel, and the magnetic steel is mounted in the mounting holes. Magnetic steel cooling holes are formed between the magnetic steel and the inner wall of the mounting hole, the magnetic steel cooling holes in the iron cores are sequentially communicated to form a magnetic steel cooling channel, and the motor comprises the rotor assembly. According to the invention, the liquid storage cavity, the liquid outlet channel, the first circulation channel, the second circulation channel and the magnetic steel cooling channel are communicated in sequence, so that oil flows orderly.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a rotor assembly and a motor. Background Art

[0002] New energy vehicles have put forward "four highs and three lows" requirements for drive motors. The "four highs and three lows" are: high speed, high efficiency, high power density, high reliability, low noise, low vibration and low cost.

[0003] A large amount of heat is generated when the motor is running. Temperature is one of the important factors affecting the motor's performance output and service life. The high speed of the motor causes a large amount of gas friction loss on the surface of the high-speed rotating rotor, further worsening the rotor's operating environment. In addition, the rotor is in a small space, and the heat dissipation paths and methods are extremely limited, which makes it more difficult to dissipate heat from the rotor.

[0004] The cooling of the motor can be divided into air cooling, water cooling and oil cooling according to the cooling medium. In air-cooled and water-cooled motors, the rotor is basically passively cooled, and the rotor heat dissipation method is mainly convection. The rotation of the rotor drives the flow of air, and the heat of the rotor is transferred to the stator assembly core through air and other media, and then the heat is dissipated through the conduction of the stator assembly core and the casing, finally achieving the purpose of heat dissipation. The oil-cooled motor can realize active cooling of the rotor. The shaft is made into a hollow shaft structure, and the cooling oil is introduced into the inner cavity of the shaft through the oil pipe. In some designs, the oil in the inner cavity of the shaft is directly thrown out through the openings on its outer wall, or thrown out through the slots on the dynamic balance plate. In some designs, the oil in the inner cavity of the shaft is introduced into the rotor core through the conveying channel to achieve cooling of the rotor core.

[0005] However, in existing oil-cooled motors, the delivery channel set on the rotor assembly has a poor guiding effect on the oil, causing the flow of the oil to be disorderly and scattered, and it is impossible to ensure the uniformity and stability of the flow rate and flow velocity of the oil in the iron core and magnetic steel of the rotor assembly, resulting in poor cooling effect. Summary of the invention

[0006] The object of the present invention is to provide a rotor assembly and a motor, which can ensure the uniformity and stability of the flow rate and flow velocity of oil in the iron core and the magnetic steel.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] The rotor assembly comprises:

[0009] A rotating shaft, wherein a liquid storage cavity is disposed in the rotating shaft, and an outer peripheral wall of the rotating shaft is provided with a liquid outlet channel connected to the liquid storage cavity;

[0010] A plurality of iron cores are sleeved on the rotating shaft and arranged side by side in sequence. A flow groove is provided on the inner wall of the iron core. A first flow hole is formed between the flow groove and the outer wall of the rotating shaft. A second flow hole and a mounting hole are provided on the iron core. The first flow holes on the plurality of iron cores are connected in sequence to form a first flow channel. The liquid storage chamber is connected to the first flow channel through the liquid outlet channel. The second flow holes on the plurality of iron cores are connected in sequence to form a second flow channel. The first flow channel is connected to the second flow channel.

[0011] A magnet is installed in the installation hole, a magnet cooling hole is formed between the magnet and the inner wall of the installation hole, the magnet cooling holes on the multiple cores are connected in sequence to form a magnet cooling channel, and the second circulation channel is connected to the outside through the magnet cooling channel.

[0012] Preferably, it further includes two dynamic balancing plates, the two dynamic balancing plates are sleeved on the rotating shaft, the multiple iron cores are clamped between the two dynamic balancing plates, and the dynamic balancing plates are provided with a first transition flow channel, and the first circulation channel is connected to the second circulation channel through the first transition flow channel.

[0013] Preferably, two ends of the first circulation channel are respectively connected to the first transition flow channels of the two dynamic balancing plates, and each of the first transition flow channels is connected to one of the second circulation channels.

[0014] Preferably, in the axial direction of the rotating shaft, the liquid outlet channel is located at a middle position of the first transition flow channels of the two dynamic balancing plates.

[0015] Preferably, the mounting holes and the magnetic steels correspond one to one, and are respectively provided with a plurality of types, and a corresponding mounting hole and a corresponding magnetic steel form a magnetic steel cooling channel, and the plurality of magnetic steel cooling channels are connected in sequence, and one end of the plurality of magnetic steel cooling channels connected in sequence is connected to the second circulation channel, and the other end is connected to the outside.

[0016] Preferably, there are two types of mounting holes, which are respectively a first mounting hole and a second mounting hole; and there are two types of magnetic steels, which are respectively a first magnetic steel and a second magnetic steel;

[0017] The first magnetic steel is installed in the first installation hole, a first magnetic steel cooling hole is formed between the first magnetic steel and the inner wall of the first installation hole, the magnetic steel cooling channel formed by sequentially connecting the first magnetic steel cooling holes on the plurality of cores is a third circulation channel, and the second circulation channel is connected to the third circulation channel;

[0018] The second magnetic steel is installed in the second mounting hole, and a second magnetic steel cooling hole is formed between the second magnetic steel and the inner wall of the second mounting hole. The magnetic steel cooling channel formed by the second magnetic steel cooling holes on the multiple iron cores being connected in sequence is the fourth circulation channel, the third circulation channel is connected to the fourth circulation channel, and the fourth circulation channel is connected to the outside.

[0019] Preferably, the two third circulation channels form a group, and the second circulation channel is connected to the two third circulation channels in one group.

[0020] Preferably, the two fourth circulation channels form a group, and the third circulation channel is connected to the two fourth circulation channels in the group.

[0021] Preferably, the distance between the third circulation channel and the core axis is L1, the distance between the fourth circulation channel and the core axis is L2, and L1 is smaller than L2.

[0022] The motor comprises a housing, a stator assembly and the above-mentioned rotor assembly, wherein the stator assembly is arranged in the housing, and the rotor assembly is inserted into the stator assembly.

[0023] Beneficial effects of the present invention:

[0024] A first circulation channel is formed between the rotating shaft and the iron core, so that the oil in the liquid storage chamber inside the rotating shaft can be stably and reliably transported to the inner wall of the iron core, and the multiple iron cores are cooled from the outside. A second flow channel connected with the first circulation channel is provided on the iron core, so that the oil can cool the iron core from the inside. A magnetic steel cooling channel is formed between the iron core and the magnetic steel, so that the oil can cool the multiple magnetic steels. The liquid storage chamber, the liquid outlet channel, the first circulation channel, the second circulation channel and the magnetic steel cooling channel are connected in sequence, and finally connected to the outside through the magnetic steel cooling channel, which has a good flow diversion effect on the oil, makes the flow of the oil orderly, ensures the uniformity and stability of the flow rate and flow velocity of the oil in the iron core and the magnetic steel, and improves the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention;

[0026] Figure 2 is an axial cross-sectional view of a rotor assembly according to an embodiment of the present invention;

[0027] Figure 3 is a radial cross-sectional view of a rotor assembly according to an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the iron core and the magnetic steel matched with each other according to an embodiment of the present invention;

[0029] Figure 5 is a schematic structural diagram of an iron core according to an embodiment of the present invention;

[0030] Figure 6 is a schematic structural diagram of a dynamic balancing plate according to an embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the oil circulation pipeline described in an embodiment of the present invention.

[0032] In the figure:

[0033] 1. Rotating shaft; 11. Liquid storage chamber; 12. Liquid outlet channel; 13. Liquid inlet channel;

[0034] 2. iron core; 21. circulation slot; 22. second circulation hole; 23. first mounting hole; 24. second mounting hole;

[0035] 3. Magnetic steel;

[0036] 4. Dynamic balance board;

[0037] 101, first circulation channel; 102, second circulation channel; 103, third circulation channel; 104, fourth circulation channel;

[0038] 201, first transition channel; 202, second transition channel; 203, third transition channel; 204, fourth transition channel. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0043] Embodiment 1

[0044] like Figure 1-Figure 7 As shown, the present invention provides a rotor assembly, including a rotating shaft 1, a plurality of iron cores 2 and a magnetic steel 3. Among them, a liquid storage chamber 11 is provided in the rotating shaft 1, and a liquid outlet channel 12 connected to the liquid storage chamber 11 is provided on the outer peripheral wall of the rotating shaft 1. A plurality of iron cores 2 are sleeved on the rotating shaft 1 and arranged side by side in sequence. A flow groove 21 is provided on the inner wall of the iron core 2, and a first flow hole is formed between the flow groove 21 and the outer wall of the rotating shaft 1. A second flow hole 22 and a mounting hole are provided on the iron core 2. The first flow holes on the plurality of iron cores 2 are connected in sequence to form a first flow channel 101. The liquid storage chamber 11 is connected to the first flow channel 101 through the liquid outlet channel 12. The second flow holes 22 on the plurality of iron cores 2 are connected in sequence to form a second flow channel 102. The first flow channel 101 is connected to the second flow channel 102. The magnetic steel 3 is installed in the mounting hole. A magnetic steel cooling hole is formed between the magnetic steel 3 and the inner wall of the mounting hole. The magnetic steel cooling holes on the plurality of iron cores 2 are connected in sequence to form a magnetic steel cooling channel. The second flow channel 102 is connected to the outside through the magnetic steel cooling channel.

[0045] In this embodiment, a first flow channel 101 is formed between the rotating shaft 1 and the iron core 2, so that the oil in the liquid storage chamber 11 inside the rotating shaft 1 can be stably and reliably transported to the inner wall of the iron core 2, and the multiple iron cores 2 are cooled from the outside. A second flow channel connected to the first flow channel 101 is provided on the iron core 2, so that the oil can cool the iron core 2 from the inside. A magnetic steel cooling channel is formed between the iron core 2 and the magnetic steel 3, so that the oil can cool the multiple magnetic steels 3. The liquid storage chamber 11, the liquid outlet channel 12, the first flow channel 101, the second flow channel 102 and the magnetic steel cooling channel are connected in sequence, and finally connected to the outside through the magnetic steel cooling channel, which has a good flow guiding effect on the oil, makes the flow of the oil orderly, ensures the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3, and improves the cooling effect.

[0046] Specifically, the rotor assembly further includes two dynamic balancing plates 4, which are sleeved on the rotating shaft 1, and a plurality of iron cores 2 are sandwiched between the two dynamic balancing plates 4. A first transition flow channel 201 is provided on the dynamic balancing plate 4, and the first circulation channel 101 is connected to the second circulation channel 102 through the first transition flow channel 201. By providing the first transition flow channel 201, the oil can flow smoothly from the first circulation channel 101 to the second circulation channel 102, further ensuring the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3.

[0047] More specifically, the dynamic balancing plate 4 is further provided with a second transition channel 202, and the second circulation channel 102 is connected to the magnetic steel cooling channel through the second transition channel 202. By providing the second transition channel 202, the oil can flow smoothly from the second circulation channel 102 into the magnetic steel cooling channel, further ensuring the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3.

[0048] In this embodiment, the iron core 2 and the dynamic balancing plate 4 are both annular plates, which are coaxially sleeved on the rotating shaft 1. The iron core 2 is formed by stacking multiple rotor punchings, and there are six of them, which are staggered and stacked in the axial direction. The iron core 2 and the rotating shaft 1 have an interference fit, and the dynamic balancing plate 4 and the rotating shaft 1 have an interference fit. The magnetic steel 3 is embedded in the mounting hole of the iron core 2. The first transition flow channel 201 extends in an L shape, from the first flow channel 101 to the second flow channel 102. The first transition flow channel 201 first extends in the radial direction of the iron core 2, and then extends in the circumferential direction of the iron core 2. The second transition flow channel 202 is in a long strip shape and extends in the circumferential direction of the iron core 2.

[0049] Specifically, the two ends of the first circulation channel 101 are respectively connected to the first transition flow channels 201 of the two dynamic balancing plates 4, and each first transition flow channel 201 is connected to a second circulation channel 102, so that the oil flowing out of the outlet channel 12 is divided in the first circulation channel 101, flows in opposite directions, and finally flows into the two second circulation channels 102 through the first transition flow channels 201 of the two dynamic balancing plates 4, and finally makes the flow directions of the oil in the two second circulation channels 102 opposite, thereby improving the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2, effectively ensuring the dynamic balance of the rotor assembly during the cooling and heat dissipation process, and improving the stability of the operation of the rotor assembly.

[0050] More specifically, in the axial direction of the rotating shaft 1, the liquid outlet channel 12 is located at the middle position of the first transition flow channels 201 of the two dynamic balancing plates 4. The above arrangement further ensures the dynamic balance of the rotor assembly during the cooling and heat dissipation process and improves the stability of the rotor assembly operation.

[0051] Specifically, a plurality of first circulation channels 101 are provided, each of which is connected to the liquid storage chamber 11 through a liquid outlet channel 12, and both ends of each first circulation channel 101 are connected to a second circulation channel 102 through a first transition channel 201, wherein the liquid storage chamber 11 is located at the axial position of the rotating shaft 1, a plurality of liquid outlet channels 12 are evenly arranged along the circumference of the rotating shaft 1, a plurality of first circulation channels 101 are evenly arranged along the circumference of the rotating shaft 1, and a plurality of second circulation channels 102 are evenly arranged along the circumference of the rotating shaft 1. The above arrangement ensures the dynamic balance of the rotor assembly during rotation, so that the oil flows evenly and stably in the iron core 2 and the magnetic steel 3.

[0052] In this embodiment, a liquid inlet channel 13 is provided on the rotating shaft 1, and the liquid inlet channel 13 and the liquid storage chamber 11 are coaxially arranged, one end of the liquid inlet channel 13 is connected to the end surface of the rotating shaft 1, and the other end is connected to the liquid storage chamber 11, three first circulation channels 101 are provided, three liquid outlet channels 12 are provided, and six second circulation channels 102 are provided. With the above arrangement, the center angle of adjacent liquid outlet channels 12 is 120°, and the center angle of adjacent second circulation channels 102 is 60°, which ensures that the flow rate and flow velocity of the oil are uniform.

[0053] In other embodiments, one, two or more first circulation channels 101 may be provided.

[0054] Specifically, the mounting holes correspond to the magnetic steels 3 one by one, and multiple mounting holes are respectively provided, and the sizes of the multiple mounting holes are different, and the sizes of the multiple magnetic steels 3 are different. The corresponding mounting holes and the magnetic steels 3 form a magnetic steel cooling channel, and the multiple magnetic steel cooling channels are connected in sequence. One end of the multiple magnetic steel cooling channels connected in sequence is connected to the second circulation channel 102, and the other end is connected to the outside. The above arrangement has a good guiding effect on the oil, and the oil flows in an orderly manner during the cooling operation, so that the oil can cool the magnetic steels 3 of various sizes in sequence.

[0055] More specifically, two types of mounting holes are provided, namely, a first mounting hole 23 and a second mounting hole 24. Two types of magnetic steels 3 are provided, namely, a first magnetic steel and a second magnetic steel. The first magnetic steel is installed in the first mounting hole 23, and a first magnetic steel cooling hole is formed between the first magnetic steel and the inner wall of the first mounting hole 23. The magnetic steel cooling channel formed by the first magnetic steel cooling holes on the multiple iron cores 2 being connected in sequence is the third circulation channel 103, and the second circulation channel 102 is connected to the third circulation channel 103. The second magnetic steel is installed in the second mounting hole 24, and a second magnetic steel cooling hole is formed between the second magnetic steel and the inner wall of the second mounting hole 24. The magnetic steel cooling channel formed by the second magnetic steel cooling holes on the multiple iron cores 2 being connected in sequence is the fourth circulation channel 104, and the third circulation channel 103 is connected to the fourth circulation channel 104, and the fourth circulation channel 104 is connected to the outside. The above arrangement has a good guiding effect on the oil. During the cooling operation, the oil flows in the third circulation channel 103 and the fourth circulation channel 104 in an orderly manner, so that the oil can cool the first magnetic steel and the second magnetic steel in turn.

[0056] In this embodiment, the second circulation channel 102 is connected to the third circulation channel 103 through the second transition channel 202 .

[0057] Specifically, one of the two dynamic balancing plates 4 is provided with a third transition channel 203, and the other is provided with a fourth transition channel 204. The third circulation channel 103 is connected to the fourth circulation channel 104 through the third transition channel 203, and the fourth circulation channel 104 is connected to the outside through the fourth transition channel 204. The above arrangement, by providing the third transition channel 203 and the fourth transition channel 204, allows the oil to flow smoothly from the third circulation channel 103 to the fourth circulation channel 104, and finally flow out from the fourth circulation channel 104.

[0058] More specifically, the third transition channel 203 and the fourth transition channel 204 both extend in the radial direction of the core 2 to adapt to the flow trend of the oil during centrifugal motion.

[0059] In this embodiment, for the six second circulation channels 102, three third transition flow channels 203 and three fourth transition flow channels 204 are provided on each dynamic balancing plate 4, and the fourth transition flow channels 204 are connected to the outside through the outflow hole. The oil in the three second circulation channels 102 first flows into the three third transition flow channels 203 on the first dynamic balancing plate 4 one by one, and then flows into the three fourth transition flow channels 204 on the second dynamic balancing plate 4 one by one, and then flows out through the outflow hole. The oil in the other three second circulation channels 102 first flows into the three third transition flow channels 203 on the second dynamic balancing plate 4 one by one, and then flows into the three fourth transition flow channels 204 on the first dynamic balancing plate 4 one by one, and then flows out through the outflow hole.

[0060] In other embodiments, the mounting holes and the magnetic steels 3 correspond one to one, and one or more than two types may be respectively provided.

[0061] Specifically, two third circulation channels 103 form a group, and the second circulation channel 102 is connected to the two third circulation channels 103 in one group. The above arrangement improves the cooling efficiency of the oil on the first magnetic steel.

[0062] More specifically, two fourth circulation channels 104 form a group, and the third circulation channel 103 is connected to a group of two fourth circulation channels 104. The above arrangement improves the cooling efficiency of the oil on the second magnetic steel.

[0063] More specifically, Figure 3 As shown, the distance between the third circulation channel 103 and the axis of the core 2 is L1, and the distance between the fourth circulation channel 104 and the axis of the core 2 is L2, and L1 is smaller than L2. The above arrangement is adapted to the flow trend of the oil during centrifugal motion, making the flow of the oil smoother and more efficient.

[0064] In this embodiment, each second circulation channel 102 is connected to two adjacent third circulation channels 103 through a second transition channel 202, two adjacent third circulation channels 103 are connected to two adjacent fourth circulation channels 104 through a third transition channel 203, and two adjacent fourth circulation channels 104 are connected to the outside through a fourth transition channel 204. The above arrangement allows the oil to carry away heat from the iron core 2, the first magnetic steel, and the second magnetic steel uniformly and stably, ensuring small temperature fluctuations.

[0065] In the rotor assembly of this embodiment, the oil circulation pipeline specifically includes a liquid inlet channel 13, a liquid storage chamber 11, a liquid outlet channel 12, a first circulation channel 101, a first transition channel 201, a second circulation channel 102, a second transition channel 202, a third circulation channel 103, a third transition channel 203, a fourth circulation channel 104 and an outflow hole which are connected in sequence.

[0066] This embodiment further provides a motor, including a housing, a stator assembly and the above-mentioned rotor assembly, wherein the stator assembly is disposed in the housing, and the rotor assembly is inserted into the stator assembly.

[0067] In the motor of the present embodiment, a first circulation channel 101 is formed between the rotating shaft 1 and the iron core 2, so that the oil in the liquid storage chamber 11 inside the rotating shaft 1 can be stably and reliably transported to the inner wall of the iron core 2, and the multiple iron cores 2 are cooled from the outside. A second flow channel connected to the first circulation channel 101 is provided on the iron core 2, so that the oil can cool the iron core 2 from the inside. A magnetic steel cooling channel is formed between the iron core 2 and the magnetic steel 3, so that the oil can cool the multiple magnetic steels 3. The liquid storage chamber 11, the liquid outlet channel 12, the first circulation channel 101, the second circulation channel 102 and the magnetic steel cooling channel are connected in sequence, and finally connected to the outside through the magnetic steel cooling channel, which has a good flow guiding effect on the oil, makes the flow of the oil orderly, ensures the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3, and improves the cooling effect.

[0068] Embodiment 2

[0069] like Figure 1-Figure 7 As shown, the present invention provides a rotor assembly, including a rotating shaft 1, a plurality of iron cores 2, a magnetic steel 3 and two dynamic balancing plates 4. The rotating shaft 1 is provided with a liquid storage chamber 11 and a liquid outlet channel 12 connected to the liquid storage chamber 11, the plurality of iron cores 2 are sleeved on the rotating shaft 1 and arranged side by side in sequence, the iron core 2 is provided with a second flow hole 22 and a mounting hole, the second flow holes 22 on the plurality of iron cores 2 are sequentially connected to form a second flow channel 102, the magnetic steel 3 is installed in the mounting hole, a magnetic steel cooling hole is formed between the magnetic steel 3 and the inner wall of the mounting hole, the magnetic steel cooling holes on the plurality of iron cores 2 are sequentially connected to form a magnetic steel cooling channel, the second flow channel 102 is connected to the outside through the magnetic steel cooling channel, the two dynamic balancing plates 4 are sleeved on the rotating shaft 1, the plurality of iron cores 2 are sandwiched between the two dynamic balancing plates 4, the dynamic balancing plates 4 are provided with a first transition flow channel 201, the liquid storage chamber 11 is connected to the first transition flow channel 201 through the liquid outlet channel 12, and the first transition flow channel 201 is connected to the second flow channel 102.

[0070] In this embodiment, by arranging a liquid outlet channel 12 on the rotating shaft 1, the oil in the liquid storage chamber 11 inside the rotating shaft 1 can be stably and reliably outputted, and by arranging a first transition flow channel 201 on the dynamic balancing plate 4, the oil outputted from the liquid outlet channel 12 can be stably and reliably transported to the second circulation channel 102 in the iron core 2, so that the oil can cool the iron core 2 from the inside, and a magnetic steel cooling channel is formed between the iron core 2 and the magnetic steel 3, so that the oil can cool the multiple magnetic steels 3, the liquid storage chamber 11, the liquid outlet channel 12, the first transition flow channel 201, the second circulation channel 102 and the magnetic steel cooling channel are connected in sequence, and finally connected to the outside through the magnetic steel cooling channel, which has a good guiding effect on the oil, makes the flow of the oil orderly, ensures the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3, and improves the cooling effect.

[0071] Specifically, the inner wall of the iron core 2 is provided with a flow groove 21, and a first flow hole is formed between the flow groove 21 and the outer wall of the rotating shaft 1. The first flow holes on the multiple iron cores 2 are connected in sequence to form a first flow channel 101. The liquid storage chamber 11 is connected to the first flow channel 101 through the liquid outlet channel 12, and the first flow channel 101 is connected to the second flow channel 102 through the first transition channel 201. The above arrangement enables the oil in the liquid storage chamber 11 inside the rotating shaft 1 to be first stably and reliably transported to the inner wall of the iron core 2, and the multiple iron cores 2 are cooled from the outside, and then flow into the second flow channel 102 through the first transition channel 201.

[0072] More specifically, the dynamic balancing plate 4 is provided with a second transition channel 202, and the second circulation channel 102 is connected to the magnetic steel cooling channel through the second transition channel 202. By providing the second transition channel 202, the oil can flow smoothly from the second circulation channel 102 into the magnetic steel cooling channel, further ensuring the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3.

[0073] In this embodiment, the iron core 2 and the dynamic balancing plate 4 are both annular plates, which are coaxially sleeved on the rotating shaft 1. The iron core 2 is formed by stacking multiple rotor punchings, and there are six of them, which are staggered and stacked in the axial direction. The iron core 2 and the rotating shaft 1 have an interference fit, and the dynamic balancing plate 4 and the rotating shaft 1 have an interference fit. The magnetic steel 3 is embedded in the mounting hole of the iron core 2. The first transition flow channel 201 extends in an L shape, from the first flow channel 101 to the second flow channel 102. The first transition flow channel 201 first extends in the radial direction of the iron core 2, and then extends in the circumferential direction of the iron core 2. The second transition flow channel 202 is in a long strip shape and extends in the circumferential direction of the iron core 2.

[0074] In other embodiments, the first flow channel 101 may not be provided between the inner wall of the iron core 2 and the outer wall of the rotating shaft 1 , and the liquid outlet channel 12 may be directly connected to the first transition flow channel 201 .

[0075] Specifically, the two ends of the first circulation channel 101 are respectively connected to the first transition flow channels 201 of the two dynamic balancing plates 4, and each first transition flow channel 201 is connected to a second circulation channel 102, so that the oil flowing out of the outlet channel 12 is divided in the first circulation channel 101, flows in opposite directions, and finally flows into the two second circulation channels 102 through the first transition flow channels 201 of the two dynamic balancing plates 4, and finally makes the flow directions of the oil in the two second circulation channels 102 opposite, thereby improving the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2, effectively ensuring the dynamic balance of the rotor assembly during the cooling and heat dissipation process, and improving the stability of the operation of the rotor assembly.

[0076] More specifically, in the axial direction of the rotating shaft 1, the liquid outlet channel 12 is located at the middle position of the first transition flow channels 201 of the two dynamic balancing plates 4. The above arrangement further ensures the dynamic balance of the rotor assembly during the cooling and heat dissipation process and improves the stability of the rotor assembly operation.

[0077] Specifically, a plurality of first circulation channels 101 are provided, each of which is connected to the liquid storage chamber 11 through a liquid outlet channel 12, and both ends of each first circulation channel 101 are connected to a second circulation channel 102 through a first transition channel 201, wherein the liquid storage chamber 11 is located at the axial position of the rotating shaft 1, a plurality of liquid outlet channels 12 are evenly arranged along the circumference of the rotating shaft 1, a plurality of first circulation channels 101 are evenly arranged along the circumference of the rotating shaft 1, and a plurality of second circulation channels 102 are evenly arranged along the circumference of the rotating shaft 1. The above arrangement ensures the dynamic balance of the rotor assembly during rotation, so that the oil flows evenly and stably in the iron core 2 and the magnetic steel 3.

[0078] In this embodiment, a liquid inlet channel 13 is provided on the rotating shaft 1, and the liquid inlet channel 13 and the liquid storage chamber 11 are coaxially arranged, one end of the liquid inlet channel 13 is connected to the end surface of the rotating shaft 1, and the other end is connected to the liquid storage chamber 11, three first circulation channels 101 are provided, three liquid outlet channels 12 are provided, and six second circulation channels 102 are provided. With the above arrangement, the center angle of adjacent liquid outlet channels 12 is 120°, and the center angle of adjacent second circulation channels 102 is 60°, which ensures that the flow rate and flow velocity of the oil are uniform.

[0079] In other embodiments, one, two or more first circulation channels 101 may be provided.

[0080] Specifically, the mounting holes correspond to the magnetic steels 3 one by one, and multiple mounting holes are respectively provided, and the sizes of the multiple mounting holes are different, and the sizes of the multiple magnetic steels 3 are different. The corresponding mounting holes and the magnetic steels 3 form a magnetic steel cooling channel, and the multiple magnetic steel cooling channels are connected in sequence. One end of the multiple magnetic steel cooling channels connected in sequence is connected to the second circulation channel 102, and the other end is connected to the outside. The above arrangement has a good guiding effect on the oil, and the oil flows in an orderly manner during the cooling operation, so that the oil can cool the magnetic steels 3 of various sizes in sequence.

[0081] More specifically, two types of mounting holes are provided, namely, a first mounting hole 23 and a second mounting hole 24. Two types of magnetic steels 3 are provided, namely, a first magnetic steel and a second magnetic steel. The first magnetic steel is installed in the first mounting hole 23, and a first magnetic steel cooling hole is formed between the first magnetic steel and the inner wall of the first mounting hole 23. The magnetic steel cooling channel formed by the first magnetic steel cooling holes on the multiple iron cores 2 being connected in sequence is the third circulation channel 103, and the second circulation channel 102 is connected to the third circulation channel 103. The second magnetic steel is installed in the second mounting hole 24, and a second magnetic steel cooling hole is formed between the second magnetic steel and the inner wall of the second mounting hole 24. The magnetic steel cooling channel formed by the second magnetic steel cooling holes on the multiple iron cores 2 being connected in sequence is the fourth circulation channel 104, and the third circulation channel 103 is connected to the fourth circulation channel 104, and the fourth circulation channel 104 is connected to the outside. The above arrangement has a good guiding effect on the oil. During the cooling operation, the oil flows in the third circulation channel 103 and the fourth circulation channel 104 in an orderly manner, so that the oil can cool the first magnetic steel and the second magnetic steel in turn.

[0082] More specifically, one of the two dynamic balancing plates 4 is provided with a third transition channel 203, and the other is provided with a fourth transition channel 204. The third circulation channel 103 is connected to the fourth circulation channel 104 through the third transition channel 203, and the fourth circulation channel 104 is connected to the outside through the fourth transition channel 204. By providing the third transition channel 203 and the fourth transition channel 204, the oil can smoothly flow from the third circulation channel 103 into the fourth circulation channel 104, and finally flow out from the fourth circulation channel 104.

[0083] In this embodiment, the second circulation channel 102 is connected to the third circulation channel 103 through the second transition channel 202 .

[0084] Specifically, the third transition channel 203 and the fourth transition channel 204 both extend in the radial direction of the core 2 to adapt to the flow trend of the oil during centrifugal motion.

[0085] In this embodiment, for the six second circulation channels 102, three third transition flow channels 203 and three fourth transition flow channels 204 are provided on each dynamic balancing plate 4, and the fourth transition flow channels 204 are connected to the outside through the outflow hole. The oil in the three second circulation channels 102 first flows into the three third transition flow channels 203 on the first dynamic balancing plate 4 one by one, and then flows into the three fourth transition flow channels 204 on the second dynamic balancing plate 4 one by one, and then flows out through the outflow hole. The oil in the other three second circulation channels 102 first flows into the three third transition flow channels 203 on the second dynamic balancing plate 4 one by one, and then flows into the three fourth transition flow channels 204 on the first dynamic balancing plate 4 one by one, and then flows out through the outflow hole.

[0086] In other embodiments, the mounting holes and the magnetic steels 3 correspond one to one, and one or more than two types may be respectively provided.

[0087] Specifically, two third circulation channels 103 form a group, and the second circulation channel 102 is connected to the two third circulation channels 103 in one group. The above arrangement improves the cooling efficiency of the oil on the first magnetic steel.

[0088] More specifically, two fourth circulation channels 104 form a group, and the third circulation channel 103 is connected to a group of two fourth circulation channels 104. The above arrangement improves the cooling efficiency of the oil on the second magnetic steel.

[0089] More specifically, Figure 3 As shown, the distance between the third circulation channel 103 and the axis of the core 2 is L1, and the distance between the fourth circulation channel 104 and the axis of the core 2 is L2, and L1 is smaller than L2. The above arrangement is adapted to the flow trend of the oil during centrifugal motion, making the flow of the oil smoother and more efficient.

[0090] In this embodiment, each second circulation channel 102 is connected to two adjacent third circulation channels 103 through a second transition channel 202, two adjacent third circulation channels 103 are connected to two adjacent fourth circulation channels 104 through a third transition channel 203, and two adjacent fourth circulation channels 104 are connected to the outside through a fourth transition channel 204. The above arrangement allows the oil to carry away heat from the iron core 2, the first magnetic steel, and the second magnetic steel uniformly and stably, ensuring small temperature fluctuations.

[0091] In the rotor assembly of this embodiment, the oil circulation pipeline specifically includes a liquid inlet channel 13, a liquid storage chamber 11, a liquid outlet channel 12, a first circulation channel 101, a first transition channel 201, a second circulation channel 102, a second transition channel 202, a third circulation channel 103, a third transition channel 203, a fourth circulation channel 104 and an outflow hole which are connected in sequence.

[0092] This embodiment further provides a motor, including a housing, a stator assembly and the above-mentioned rotor assembly, wherein the stator assembly is disposed in the housing, and the rotor assembly is inserted into the stator assembly.

[0093] In the motor of the present embodiment, by arranging the liquid outlet channel 12 on the rotating shaft 1, the oil in the liquid storage chamber 11 inside the rotating shaft 1 can be stably and reliably outputted, and by arranging the first transition flow channel 201 on the dynamic balancing plate 4, the oil outputted from the liquid outlet channel 12 can be stably and reliably transported to the second circulation channel 102 in the iron core 2, so that the oil can cool the iron core 2 from the inside, and a magnetic steel cooling channel is formed between the iron core 2 and the magnetic steel 3, so that the oil can cool the multiple magnetic steels 3, the liquid storage chamber 11, the liquid outlet channel 12, the first transition flow channel 201, the second circulation channel 102 and the magnetic steel cooling channel are connected in sequence, and finally connected to the outside through the magnetic steel cooling channel, which has a good guiding effect on the oil, makes the flow of the oil orderly, ensures the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3, and improves the cooling effect.

[0094] Embodiment 3

[0095] like Figure 1-Figure 7 As shown, the present invention provides a rotor assembly, including a rotating shaft 1, a plurality of iron cores 2 and a magnetic steel 3. The rotating shaft 1 is provided with a liquid storage cavity 11 and a liquid outlet channel 12 connected to the liquid storage cavity 11, the plurality of iron cores 2 are sleeved on the rotating shaft 1 and arranged side by side in sequence, the iron core 2 is provided with a second flow hole 22 and a mounting hole, the second flow holes 22 on the plurality of iron cores 2 are connected in sequence to form a second flow channel 102, the liquid storage cavity 11 is connected to the second flow channel 102 through the liquid outlet channel 12, the magnetic steel 3 is installed in the mounting hole, a magnetic steel cooling hole is formed between the magnetic steel 3 and the inner wall of the mounting hole, the magnetic steel cooling holes on the plurality of iron cores 2 are connected in sequence to form a magnetic steel cooling channel, and the second flow channel 102 is connected to the outside through the magnetic steel cooling channel.

[0096] In this embodiment, by arranging a liquid outlet channel 12 on the rotating shaft 1, the oil in the liquid storage chamber 11 inside the rotating shaft 1 can be stably and reliably transported to the second circulation channel 102 in the iron core 2, so that the oil can cool the iron core 2 from the inside, and a magnetic steel cooling channel is formed between the iron core 2 and the magnetic steel 3, so that the oil can cool the multiple magnetic steels 3. The liquid storage chamber 11, the liquid outlet channel 12, the second circulation channel 102 and the magnetic steel cooling channel are connected in sequence, and finally connected to the outside through the magnetic steel cooling channel, which has a good flow guiding effect on the oil, makes the flow of the oil orderly, ensures the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3, and improves the cooling effect.

[0097] Specifically, the inner wall of the iron core 2 is provided with a flow groove 21, and a first flow hole is formed between the flow groove 21 and the outer wall of the rotating shaft 1. The first flow holes on the multiple iron cores 2 are connected in sequence to form a first flow channel 101. The liquid storage chamber 11 is connected to the first flow channel 101 through the liquid outlet channel 12, and the first flow channel 101 is connected to the second flow channel 102. The above arrangement enables the oil in the liquid storage chamber 11 inside the rotating shaft 1 to be first stably and reliably transported to the inner wall of the iron core 2, and the multiple iron cores 2 are cooled from the outside, and then flow into the second flow channel 102.

[0098] More specifically, the rotor assembly further includes two dynamic balancing plates 4, which are sleeved on the rotating shaft 1, and a plurality of iron cores 2 are sandwiched between the two dynamic balancing plates 4. A first transition flow channel 201 is provided on the dynamic balancing plate 4, and the first circulation channel 101 is connected to the second circulation channel 102 through the first transition flow channel 201. By providing the first transition flow channel 201, the oil can flow smoothly from the first circulation channel 101 to the second circulation channel 102, thereby ensuring the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3.

[0099] More specifically, the dynamic balancing plate 4 is further provided with a second transition channel 202, and the second circulation channel 102 is connected to the magnetic steel cooling channel through the second transition channel 202. By providing the second transition channel 202, the oil can flow smoothly from the second circulation channel 102 into the magnetic steel cooling channel, further ensuring the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3.

[0100] In this embodiment, the iron core 2 and the dynamic balancing plate 4 are both annular plates, which are coaxially sleeved on the rotating shaft 1. The iron core 2 is formed by stacking multiple rotor punchings, and there are six of them, which are staggered and stacked in the axial direction. The iron core 2 and the rotating shaft 1 have an interference fit, and the dynamic balancing plate 4 and the rotating shaft 1 have an interference fit. The magnetic steel 3 is embedded in the mounting hole of the iron core 2. The first transition flow channel 201 extends in an L shape, from the first flow channel 101 to the second flow channel 102. The first transition flow channel 201 first extends in the radial direction of the iron core 2, and then extends in the circumferential direction of the iron core 2. The second transition flow channel 202 is in a long strip shape and extends in the circumferential direction of the iron core 2.

[0101] Specifically, the two ends of the first circulation channel 101 are respectively connected to the first transition flow channels 201 of the two dynamic balancing plates 4, and each first transition flow channel 201 is connected to a second circulation channel 102, so that the oil flowing out of the outlet channel 12 is divided in the first circulation channel 101, flows in opposite directions, and finally flows into the two second circulation channels 102 through the first transition flow channels 201 of the two dynamic balancing plates 4, and finally makes the flow directions of the oil in the two second circulation channels 102 opposite, thereby improving the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2, effectively ensuring the dynamic balance of the rotor assembly during the cooling and heat dissipation process, and improving the stability of the operation of the rotor assembly.

[0102] More specifically, in the axial direction of the rotating shaft 1, the liquid outlet channel 12 is located at the middle position of the first transition flow channels 201 of the two dynamic balancing plates 4. The above arrangement further ensures the dynamic balance of the rotor assembly during the cooling and heat dissipation process and improves the stability of the rotor assembly operation.

[0103] Specifically, a plurality of first circulation channels 101 are provided, each of which is connected to the liquid storage chamber 11 through a liquid outlet channel 12, and both ends of each first circulation channel 101 are connected to a second circulation channel 102 through a first transition channel 201, wherein the liquid storage chamber 11 is located at the axial position of the rotating shaft 1, a plurality of liquid outlet channels 12 are evenly arranged along the circumference of the rotating shaft 1, a plurality of first circulation channels 101 are evenly arranged along the circumference of the rotating shaft 1, and a plurality of second circulation channels 102 are evenly arranged along the circumference of the rotating shaft 1. The above arrangement ensures the dynamic balance of the rotor assembly during rotation, so that the oil flows evenly and stably in the iron core 2 and the magnetic steel 3.

[0104] In this embodiment, a liquid inlet channel 13 is provided on the rotating shaft 1, and the liquid inlet channel 13 and the liquid storage chamber 11 are coaxially arranged, one end of the liquid inlet channel 13 is connected to the end surface of the rotating shaft 1, and the other end is connected to the liquid storage chamber 11, three first circulation channels 101 are provided, three liquid outlet channels 12 are provided, and six second circulation channels 102 are provided. With the above arrangement, the center angle of adjacent liquid outlet channels 12 is 120°, and the center angle of adjacent second circulation channels 102 is 60°, which ensures that the flow rate and flow velocity of the oil are uniform.

[0105] In other embodiments, one, two or more first circulation channels 101 may be provided.

[0106] Specifically, the mounting holes correspond to the magnetic steels 3 one by one, and multiple mounting holes are respectively provided, and the sizes of the multiple mounting holes are different, and the sizes of the multiple magnetic steels 3 are different. The corresponding mounting holes and the magnetic steels 3 form a magnetic steel cooling channel, and the multiple magnetic steel cooling channels are connected in sequence. One end of the multiple magnetic steel cooling channels connected in sequence is connected to the second circulation channel 102, and the other end is connected to the outside. The above arrangement has a good guiding effect on the oil, and the oil flows in an orderly manner during the cooling operation, so that the oil can cool the magnetic steels 3 of various sizes in sequence.

[0107] More specifically, two types of mounting holes are provided, namely, a first mounting hole 23 and a second mounting hole 24. Two types of magnetic steels 3 are provided, namely, a first magnetic steel and a second magnetic steel. The first magnetic steel is installed in the first mounting hole 23, and a first magnetic steel cooling hole is formed between the first magnetic steel and the inner wall of the first mounting hole 23. The magnetic steel cooling channel formed by the first magnetic steel cooling holes on the multiple iron cores 2 being connected in sequence is the third circulation channel 103, and the second circulation channel 102 is connected to the third circulation channel 103. The second magnetic steel is installed in the second mounting hole 24, and a second magnetic steel cooling hole is formed between the second magnetic steel and the inner wall of the second mounting hole 24. The magnetic steel cooling channel formed by the second magnetic steel cooling holes on the multiple iron cores 2 being connected in sequence is the fourth circulation channel 104, and the third circulation channel 103 is connected to the fourth circulation channel 104, and the fourth circulation channel 104 is connected to the outside. The above arrangement has a good guiding effect on the oil. During the cooling operation, the oil flows in the third circulation channel 103 and the fourth circulation channel 104 in an orderly manner, so that the oil can cool the first magnetic steel and the second magnetic steel in turn.

[0108] In this embodiment, the second circulation channel 102 is connected to the third circulation channel 103 through the second transition channel 202 .

[0109] Specifically, one of the two dynamic balancing plates 4 is provided with a third transition channel 203, and the other is provided with a fourth transition channel 204. The third circulation channel 103 is connected to the fourth circulation channel 104 through the third transition channel 203, and the fourth circulation channel 104 is connected to the outside through the fourth transition channel 204. The above arrangement, by providing the third transition channel 203 and the fourth transition channel 204, allows the oil to flow smoothly from the third circulation channel 103 to the fourth circulation channel 104, and finally flow out from the fourth circulation channel 104.

[0110] More specifically, the third transition channel 203 and the fourth transition channel 204 both extend in the radial direction of the core 2 to adapt to the flow trend of the oil during centrifugal motion.

[0111] In this embodiment, for the six second circulation channels 102, three third transition flow channels 203 and three fourth transition flow channels 204 are provided on each dynamic balancing plate 4, and the fourth transition flow channels 204 are connected to the outside through the outflow hole. The oil in the three second circulation channels 102 first flows into the three third transition flow channels 203 on the first dynamic balancing plate 4 one by one, and then flows into the three fourth transition flow channels 204 on the second dynamic balancing plate 4 one by one, and then flows out through the outflow hole. The oil in the other three second circulation channels 102 first flows into the three third transition flow channels 203 on the second dynamic balancing plate 4 one by one, and then flows into the three fourth transition flow channels 204 on the first dynamic balancing plate 4 one by one, and then flows out through the outflow hole.

[0112] In other embodiments, the mounting holes and the magnetic steels 3 correspond one to one, and one or more than two types may be respectively provided.

[0113] Specifically, two third circulation channels 103 form a group, and the second circulation channel 102 is connected to the two third circulation channels 103 in one group. The above arrangement improves the cooling efficiency of the oil on the first magnetic steel.

[0114] More specifically, two fourth circulation channels 104 form a group, and the third circulation channel 103 is connected to a group of two fourth circulation channels 104. The above arrangement improves the cooling efficiency of the oil on the second magnetic steel.

[0115] More specifically, Figure 3 As shown, the distance between the third circulation channel 103 and the axis of the core 2 is L1, and the distance between the fourth circulation channel 104 and the axis of the core 2 is L2, and L1 is smaller than L2. The above arrangement is adapted to the flow trend of the oil during centrifugal motion, making the flow of the oil smoother and more efficient.

[0116] In this embodiment, each second circulation channel 102 is connected to two adjacent third circulation channels 103 through a second transition channel 202, two adjacent third circulation channels 103 are connected to two adjacent fourth circulation channels 104 through a third transition channel 203, and two adjacent fourth circulation channels 104 are connected to the outside through a fourth transition channel 204. The above arrangement allows the oil to carry away heat from the iron core 2, the first magnetic steel, and the second magnetic steel uniformly and stably, ensuring small temperature fluctuations.

[0117] In the rotor assembly of this embodiment, the oil circulation pipeline specifically includes a liquid inlet channel 13, a liquid storage chamber 11, a liquid outlet channel 12, a first circulation channel 101, a first transition channel 201, a second circulation channel 102, a second transition channel 202, a third circulation channel 103, a third transition channel 203, a fourth circulation channel 104 and an outflow hole which are connected in sequence.

[0118] This embodiment further provides a motor, including a housing, a stator assembly and the above-mentioned rotor assembly, wherein the stator assembly is disposed in the housing, and the rotor assembly is inserted into the stator assembly.

[0119] In the motor of the present embodiment, a liquid outlet channel 12 is provided on the rotating shaft 1, so that the oil in the liquid storage chamber 11 inside the rotating shaft 1 can be stably and reliably transported to the second circulation channel 102 in the iron core 2, so that the oil can cool the iron core 2 from the inside, and a magnetic steel cooling channel is formed between the iron core 2 and the magnetic steel 3, so that the oil can cool the multiple magnetic steels 3, the liquid storage chamber 11, the liquid outlet channel 12, the second circulation channel 102 and the magnetic steel cooling channel are connected in sequence, and finally connected to the outside through the magnetic steel cooling channel, which has a good flow guiding effect on the oil, makes the flow of the oil orderly, ensures the uniformity and stability of the flow rate and flow velocity of the oil in the iron core 2 and the magnetic steel 3, and improves the cooling effect.

[0120] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A rotor assembly, characterized in that: include: A rotating shaft (1), wherein a liquid storage cavity (11) is provided in the rotating shaft (1), and an outer peripheral wall of the rotating shaft (1) is provided with a liquid outlet channel (12) connected to the liquid storage cavity (11); A plurality of iron cores (2) are sleeved on the rotating shaft (1) and arranged side by side in sequence; a circulation groove (21) is provided on the inner wall of the iron core (2); a first circulation hole is formed between the circulation groove (21) and the outer wall of the rotating shaft (1); a second circulation hole (22) and a mounting hole are provided on the iron core (2); the first circulation holes on the plurality of iron cores (2) are connected in sequence to form a first circulation channel (101); the liquid storage chamber (11) is connected to the first circulation channel (101) through the liquid outlet channel (12); the second circulation holes (22) on the plurality of iron cores (2) are connected in sequence to form a second circulation channel (102); the first circulation channel (101) is connected to the second circulation channel (102); A magnetic steel (3) is installed in the installation hole, a magnetic steel cooling hole is formed between the magnetic steel (3) and the inner wall of the installation hole, the magnetic steel cooling holes on the plurality of iron cores (2) are connected in sequence to form a magnetic steel cooling channel, and the second circulation channel (102) is connected to the outside through the magnetic steel cooling channel.

2. The rotor assembly according to claim 1, characterized in that The invention also comprises two dynamic balancing plates (4), wherein the two dynamic balancing plates (4) are sleeved on the rotating shaft (1), and the plurality of iron cores (2) are sandwiched between the two dynamic balancing plates (4). A first transition flow channel (201) is provided on the dynamic balancing plate (4), and the first circulation channel (101) is connected to the second circulation channel (102) through the first transition flow channel (201).

3. The rotor assembly according to claim 2, characterized in that: Both ends of the first circulation channel (101) are respectively connected to the first transition flow channels (201) of the two dynamic balancing plates (4), and each of the first transition flow channels (201) is connected to one of the second circulation channels (102).

4. The rotor assembly according to claim 3, characterized in that: In the axial direction of the rotating shaft (1), the liquid outlet channel (12) is located at a middle position of the first transition flow channels (201) of the two dynamic balancing plates (4).

5. The rotor assembly according to claim 1, characterized in that: The mounting holes and the magnetic steels (3) correspond to each other one by one, and are respectively provided in multiple forms. A corresponding mounting hole and a corresponding magnetic steel (3) form a magnetic steel cooling channel. The multiple magnetic steel cooling channels are connected in sequence, and one end of the multiple magnetic steel cooling channels connected in sequence is connected to the second circulation channel (102), and the other end is connected to the outside.

6. The rotor assembly according to claim 5, characterized in that There are two types of mounting holes, the two types of mounting holes are respectively a first mounting hole (23) and a second mounting hole (24); there are two types of magnetic steels (3), the two types of magnetic steels (3) are respectively a first magnetic steel and a second magnetic steel; The first magnetic steel is installed in the first installation hole (23), a first magnetic steel cooling hole is formed between the first magnetic steel and the inner wall of the first installation hole (23), the magnetic steel cooling channel formed by sequentially connecting the first magnetic steel cooling holes on the plurality of cores (2) is a third circulation channel (103), and the second circulation channel (102) is connected to the third circulation channel (103); The second magnetic steel is installed in the second mounting hole (24), a second magnetic steel cooling hole is formed between the second magnetic steel and the inner wall of the second mounting hole (24), the magnetic steel cooling channel formed by sequentially connecting the second magnetic steel cooling holes on the plurality of cores (2) is a fourth circulation channel (104), the third circulation channel (103) is connected to the fourth circulation channel (104), and the fourth circulation channel (104) is connected to the outside.

7. The rotor assembly according to claim 6, characterized in that The two third circulation channels (103) form a group, and the second circulation channel (102) is connected to the two third circulation channels (103) in one group.

8. The rotor assembly according to claim 6, characterized in that The two fourth circulation channels (104) form a group, and the third circulation channel (103) is connected to the two fourth circulation channels (104) in one group.

9. The rotor assembly according to claim 6, characterized in that: The distance between the third circulation channel (103) and the axis of the iron core (2) is L1, and the distance between the fourth circulation channel (104) and the axis of the iron core (2) is L2, and L1 is smaller than L2.

10. A motor, characterized in that It comprises a housing, a stator assembly and a rotor assembly as described in any one of claims 1 to 9, wherein the stator assembly is arranged in the housing, and the rotor assembly is passed through the stator assembly.

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