Motor and motor system

Abstract

The invention provides a motor and a motor system, the motor comprises a casing, and a stator core, a rotor core and a rotating shaft which are located in the casing, the rotor core sleeves the rotating shaft, the stator core surrounds the rotor core and is fixed on the inner circumferential wall of the casing, an air gap is arranged between the rotor core and the stator core, a winding is arranged on the stator core, and the winding is wound around the rotor core and is fixed on the inner circumferential wall of the casing. An annular isolation cover is further arranged in the machine shell and comprises an annular partition plate and a cylindrical partition plate, the outer edge of the annular partition plate is fixed to the inner wall face of the machine shell, the cylindrical partition plate is connected to the inner edge of the annular partition plate, a containing cavity is formed between the cylindrical partition plate and the wall face of the machine shell, and the part, protruding out of the stator iron core, of the winding is located in the containing cavity. The casing is provided with a first injection hole, the outer side of the peripheral surface of the stator core is provided with a first flow channel, and one end of the first flow channel is communicated with the first injection hole and the accommodating cavity, so that the technical problem of poor cooling effect of the stator winding in the motor in the prior art can be solved.

Description

Technical Field

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

[0002] Motor cooling has a great influence on motor performance. The motor cooling effect and the excessively high temperature of the motor limit the high power density and torque density of the motor. Good heat dissipation and cooling play a great role in improving motor performance. Existing motor cooling technologies include air cooling, water cooling, oil cooling, etc., but air cooling, water cooling, and oil cooling have limited cooling effects on the motor winding ends and the inside of the core; especially the winding part on the stator of the motor, except for the part where the winding contacts the stator core, the rest of the winding is suspended and not in contact with the outside. The specific heat capacity of the air is low, and the cooling effect of air cooling itself is relatively poor; it is difficult for water cooling and oil cooling to completely cover the suspended part of the winding, and the cooling effect of this part of the winding is poor.

[0003] How to cool down the motor more effectively, especially the suspended part of the winding, is a technical problem that needs to be solved urgently. Summary of the invention

[0004] Therefore, the present invention provides a motor and a motor system, which can solve the technical problem of poor cooling effect of the stator winding in the motor in the prior art.

[0005] On the one hand, the present invention provides a motor, comprising a casing, a stator core, a rotor core and a rotating shaft located in the casing, the rotor core is sleeved on the rotating shaft, the stator core surrounds the rotor core and is fixed on the inner peripheral wall of the casing, an air gap is arranged between the rotor core and the stator core, a winding is arranged on the stator core, an annular partition is further arranged in the casing, the annular partition comprises an annular partition plate and a cylindrical partition plate, the outer edge of the annular partition plate is fixed on the inner wall surface of the casing, the cylindrical partition plate is connected to the inner edge of the annular partition plate, an accommodating cavity is formed between the cylindrical partition plate, the annular partition plate and the wall surface of the casing, and the part of the winding protruding from the stator core is located in the accommodating cavity;

[0006] The housing is provided with a first injection hole, and the outer side of the outer peripheral surface of the stator core is provided with a first flow channel, and one end of the first flow channel is connected with the first injection hole and the accommodating cavity.

[0007] In some embodiments, an air gap is provided between the stator core and the rotor core, and a second flow channel connected between the first flow channel and the air gap is provided inside the stator core.

[0008] In some embodiments, the rotating shaft is provided with a second injection hole, a third flow channel is provided in the rotating shaft, a fourth flow channel is provided in the rotor core and penetrates the rotor core in an axial direction, and the third flow channel is connected to the second injection hole and the fourth flow channel.

[0009] In some embodiments, baffles are provided at both axial ends of the rotor core. In the axial direction, the baffles are opposite to the cylindrical partition, and a preset gap is provided between the baffles and the cylindrical partition.

[0010] In some embodiments, end covers are provided at both ends of the casing, one of which is a first end cover, an annular partition adjacent to the first end cover is a first partition, a discharge channel is provided between the first end cover and the first partition, and the casing is provided with a discharge hole, which is connected to the discharge channel.

[0011] In some embodiments, when a third flow channel and a fourth flow channel are provided, at least one of the first flow channel, the third flow channel and the fourth flow channel is provided with a spoiler.

[0012] In some embodiments, the motor further comprises a stator spacer, the stator spacer comprises a plurality of first rods extending in a radial direction, the plurality of first rods being fixed together via a first ring; the stator spacer is further provided with a sixth flow channel, the sixth flow channel flows through the first ring in a radial direction;

[0013] The stator spacer is arranged inside the stator core, and the second flow channel is formed between two adjacent first rods.

[0014] In some embodiments, the first end of the first rod faces outward in the radial direction, the second end of the first rod faces inward in the radial direction, and a gap is provided between the first end of the first rod and the inner wall surface of the housing;

[0015] The first ring is located at the first end of the first rod, or the first ring is located at the second end of the first rod, or the first ring is fixed at the middle of the first rod.

[0016] In some embodiments, the stator spacer further includes a second ring. When the first ring is disposed at the first end of the first rod, the second ring is disposed at the second end of the first rod. Both the first ring and the second ring are provided with a second through hole extending in a radial direction.

[0017] In some embodiments, in the axial direction, the size of the first circular ring is smaller than that of the first rod, or a first through hole is provided on the first circular ring.

[0018] In some embodiments, the motor further comprises a rotor spacer, the rotor spacer comprises a plurality of second rods extending in a radial direction, the plurality of second rods being fixed together via a third ring; the rotor spacer is further provided with a seventh flow channel, the seventh flow channel flows through the third ring in a radial direction;

[0019] The rotor spacer is arranged inside the rotor core, a fifth flow channel is formed between two adjacent second rods, and the third flow channel corresponds to the fifth flow channel one by one.

[0020] In some embodiments, the first end of the second rod faces the outside in the radial direction, and the second end of the second rod faces the inside in the radial direction;

[0021] The third ring is located at the first end of the second rod, or the third ring is located at the second end of the second rod, or the third ring is fixed at the middle of the second rod.

[0022] In some embodiments, the rotor spacer also includes a fourth ring and an eighth flow channel flowing through the fourth ring in a radial direction, the fourth ring and the third ring are respectively arranged at both ends of the second rod, and the fourth ring and the third ring are both provided with a fourth through hole extending in the radial direction.

[0023] In some embodiments, in the axial direction, the size of the third ring is smaller than that of the second rod, or a third through hole is provided on the third ring.

[0024] The present invention also provides a motor system, including a pressure pump, a cooling container and the motor, wherein cooling paste is arranged in the cooling container, and when a second injection hole and a discharge hole are provided, the inlet of the pressure pump is connected with the outlet of the cooling container, the outlet of the pressure pump is connected with both the first injection hole and the second injection hole, and the discharge hole is connected with the inlet of the cooling container.

[0025] The present invention arranges an annular partition outside the winding at one end of the stator core, and the winding is arranged in an accommodating cavity, so that the cooling paste enters the accommodating cavity under the action of pressure, and then the cooling paste can be fully diffused in the accommodating cavity, and then covers the winding located in the accommodating cavity, thereby achieving sufficient cooling of the winding in the accommodating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0027] Figure 1 is a cross-sectional view of a motor according to an embodiment of the present invention;

[0028] Figure 2 The embodiment of the present invention Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 The embodiment of the present invention Figure 1 Enlarged view of point B in the middle;

[0030] Figure 4 is a cross-sectional view of a motor according to an embodiment of the present invention provided with a stator spacer and a rotor spacer;

[0031] Figure 5 The embodiment of the present invention Figure 4 Enlarged view of point C in the middle;

[0032] Figure 6 is a schematic diagram of a spoiler according to an embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of a case where a first ring and a second ring are disposed on a first rod in an embodiment of the present invention;

[0034] Figure 8 is a schematic diagram of a stator spacer in an embodiment of the present invention in which a first circular ring is arranged at the second end of a first rod and a through hole is arranged in the first circular ring;

[0035] Fig. 9 is a schematic diagram of a stator spacer in an embodiment of the present invention, in which a first circular ring is arranged at a second end of a first rod, and a size of the first circular ring in an axial direction is smaller than a size of the first rod;

[0036] Fig.10 It is a schematic diagram of a stator spacer when the first circular ring is arranged at the middle part of the first rod and the first circular ring is provided with a through hole in an embodiment of the present invention;

[0037] Fig.11 It is a schematic diagram of a stator spacer in an embodiment of the present invention, in which a first circular ring is arranged at the middle of a first rod, and a size of the first circular ring in the axial direction is smaller than a size of the first rod;

[0038] Fig.12 is a schematic diagram of a case where a third ring and a fourth ring are provided on the second rod of an embodiment of the present invention;

[0039] Fig.13 is a schematic diagram of a rotor spacer when the third ring is arranged at the second end of the second rod and the third ring is provided with a through hole in an embodiment of the present invention;

[0040] Fig.14is a schematic diagram of a rotor spacer in an embodiment of the present invention in which a third ring is arranged at a second end of a second rod and a size of the third ring in an axial direction is smaller than that of the second rod;

[0041] Fig.15 is a schematic diagram of a rotor spacer when the third ring of an embodiment of the present invention is arranged at the middle of the second rod and the third ring is provided with a through hole;

[0042] Fig.16 It is a schematic diagram of a rotor spacer in an embodiment of the present invention, in which a third ring is arranged in the middle of a second rod and a size of the third ring in the axial direction is smaller than that of the second rod;

[0043] The accompanying drawings are marked as follows:

[0044] 1. stator core; 101. winding; 2. rotor core; 201. baffle; 202. preset gap; 203. annular flow channel; 3. rotating shaft; 4. air gap; 5. annular shroud; 501. annular baffle; 502. cylindrical baffle; 503. accommodating chamber; 504. outflow hole; 601. first injection hole; 602. second injection hole; 701. first flow channel; 702. second flow channel; 703 , third flow channel; 704, fourth flow channel; 705, fifth flow channel; 706, sixth flow channel; 707, seventh flow channel; 708, eighth flow channel; 801, end cover; 802, discharge channel; 803, discharge hole; 804, spoiler; 901, first rod; 9011, first ring; 9012, second ring; 902, second rod; 9021, third ring; 9022, fourth ring; DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0049] See also Figure 1-16 As shown, the present invention provides a motor, comprising a casing and a stator core 1, a rotor core 2 and a rotating shaft 3 located in the casing, wherein the rotor core 2 is sleeved on the rotating shaft 3, the stator core 1 surrounds the rotor core 2 and is fixed on the inner peripheral wall of the casing, an air gap 4 is arranged between the rotor core 2 and the stator core 1, a winding 101 is arranged on the stator core 1, and an annular partition 5 is further arranged in the casing, the annular partition 5 comprises an annular partition plate 501 and a cylindrical partition plate 502, the outer edge of the annular partition plate 501 is fixed on the inner wall surface of the casing, the cylindrical partition plate 502 is connected to the inner edge of the annular partition plate 501, an accommodating cavity 503 is formed between the cylindrical partition plate 502, the annular partition plate 501 and the wall surface of the casing, and the portion of the winding 101 protruding from the stator core 1 is located in the accommodating cavity 503;

[0050] The housing is provided with a first injection hole 601 , and the outer peripheral surface of the stator core 1 is provided with a first flow channel 701 . One end of the first flow channel 701 is connected with the first injection hole 601 and the accommodating cavity 503 .

[0051] By setting the annular spacer 5, the first flow channel 701 is connected to the first injection hole 601 and the accommodating cavity 503 formed by the annular spacer 5, and the two ends of the winding 101 on the stator core 1 are set in the accommodating cavity 503. When the cooling paste (cooling paste refers to a cooling substance in a molten state, a solid with a certain fluidity, similar to toothpaste) is injected, the cooling paste can enter the accommodating cavity 503. Since the fluidity of the cooling paste itself is poorer than that of liquid cooling oil, the cooling paste can be fully diffused in the accommodating cavity 503 under the action of pressure, and fully covers the winding 101 in the accommodating cavity 503, thereby improving the cooling effect of the winding 101; specifically, the suspended part of the winding 101 is better cooled. The suspended part of the winding 101 refers to the part of the winding 101 located on the axial outside of the stator core 1 after the winding 101 is wound on the stator core 1, and this part of the winding 101 does not contact other physical structures in the radial direction and the circumferential direction.

[0052] The axial direction in the present application refers to the axial direction of the rotating shaft 3 , the circumferential direction refers to the axial direction of the rotating shaft 3 , and the radial direction refers to the radial direction of the rotating shaft 3 .

[0053] Preferably, Figure 1 , Figure 2 and Figure 5 As shown, an air gap 4 is provided between the stator core 1 and the rotor core 2 , and a second flow channel 702 communicating with the first flow channel 701 and the air gap 4 is provided inside the stator core 1 .

[0054] When the temperature of the cooling paste increases, the paste will turn into a liquid state. For the sake of convenience, the cooling fluid hereinafter includes cooling materials in both paste and liquid states.

[0055] By providing the second flow channel 702, the cooling fluid flowing in the first flow channel 701 can enter the second flow channel 702 under the action of pressure, and then enter the air gap 4. When the cooling fluid flows in the second flow channel 702, the inside of the stator core 1 can be effectively cooled; after the cooling fluid enters the air gap 4, on the one hand, the cooling paste flows in the air gap 4 along the axial direction, and on the other hand, the cooling fluid flows in the air gap 4 along the circumferential direction under the action of the rotation of the rotor, thereby being able to efficiently cool the inner circumference of the stator core 1 and the outer circumference of the rotor in the axial and circumferential directions.

[0056] The cooling paste needs to absorb heat when it melts into cooling liquid. Therefore, the use of cooling paste is also conducive to absorbing heat and cooling the motor.

[0057] Preferably, Figure 1As shown, the rotating shaft 3 is provided with a second injection hole 602, a third flow channel 703 is provided in the rotating shaft 3, a fourth flow channel 704 is provided in the rotor core 2 and penetrates the rotor core 2 in the axial direction, and the third flow channel 703 is connected to the second injection hole 602 and the fourth flow channel 704.

[0058] By providing a second injection hole 602 on the rotating shaft 3 and a fourth flow channel 704 on the rotor core 2, when the cooling fluid is injected through the second injection hole 602, the cooling paste enters the fourth flow channel 704 through the third flow channel 703 to effectively cool the rotor core 2. The fluidity of the cooling fluid itself is poorer than that of the cooling oil. Under the action of external pressure, the cooling fluid is fully diffused in the third flow channel 703 and the fourth flow channel 704, thereby achieving a better cooling effect on the rotating shaft 3 and the rotor core 2.

[0059] Preferably, Figure 1 , Figure 2 As shown, baffles 201 are provided at both axial ends of the rotor core 2 . In the axial direction, the baffles 201 are opposite to the cylindrical partition 502 , and a preset gap 202 is provided between the baffles 201 and the cylindrical partition 502 .

[0060] Due to the provision of the preset gap 202, the cooling paste in the accommodating cavity 503 flows out from the preset gap 202 under the action of pressure. Since the preset gap 202 is provided between the baffle 201 and the cylindrical partition 502, the baffle 201 rotates relative to the cylindrical partition 502, which enables the cooling paste to act as a cooling paste between the baffle 201 and the cylindrical partition 502 to lubricate the relative movement between the two.

[0061] Furthermore, an outflow hole 504 is provided on the cylindrical partition plate 502, and the cooling fluid in the accommodating cavity 503 can not only flow out from the preset gap 202, but also flow out from the outflow hole 504.

[0062] Furthermore, a baffle 201 is provided at each end of the rotor core 2, and an annular partition 5 is provided at each end of the stator core 1. The rotor core 2 is provided between two cylindrical partitions 502. The two cylindrical partitions 502 limit the rotor core 2 in the axial direction. When the rotor is subjected to an axial force, in addition to the axial limit of the shaft 3 by the bearing, the two cylindrical partitions 502 limit the rotor core 2 in the axial direction. Since the rotor core 2 is fixed on the shaft 3, the axial limit of the shaft 3 is also achieved. Since the output performance of the motor is closely related to the electromagnetic force between the stator and the rotor, the positional relationship between the stator core 1 and the rotor core 2 in the axial direction directly affects the size and stability of the force between the stator and the rotor. The rotor core 2 is directly limited in the axial direction by two cylindrical partitions 502, so that the position between the rotor core 2 and the stator core 1 is relatively stable, thereby improving the stability of the motor output performance.

[0063] Preferably, Figure 1 As shown, end covers 801 are provided at both ends of the casing, one of the end covers 801 is a first end cover 801, the annular partition 501 adjacent to the first end cover 801 is a first partition, a discharge channel 802 is provided between the first end cover 801 and the first partition, and the casing is provided with a discharge hole 803, and the discharge hole 803 is connected to the discharge channel 802.

[0064] By setting a discharge hole 803 on the casing between the first end cover 801 and the first partition, the cooling fluid injected from the first injection hole 601 and the second injection hole 602 can fully flow and diffuse in the casing and then flow out from the discharge hole 803, which is beneficial to improving the cooling effect on the inside of the motor casing.

[0065] Furthermore, the other of the two end covers 801 is a second end cover 801 , the other of the two annular partitions 501 is a second partition, and a discharge hole 803 may also be provided on the casing between the second partition and the second end cover 801 .

[0066] Preferably, when the third flow channel 703 and the fourth flow channel 704 are provided, at least one of the first flow channel 701 , the third flow channel 703 and the fourth flow channel 704 is provided with a spoiler 804 .

[0067] The spoiler 804 is used to disrupt the flow of the cooling fluid to prevent the cooling fluid from having a higher temperature in the portion in contact with the solid structure and a lower temperature in the remaining portion, which would result in the cooling fluid being unable to effectively cool the solid structure.

[0068] Specifically, the spoiler 804 includes two metal plates perpendicular to each other.

[0069] Preferably, Figure 4 , Figure 5 , Figures 7 to 11 As shown, the motor further includes a stator spacer, the stator spacer includes a plurality of first rods 901 extending in a radial direction, and the plurality of first rods 901 are fixed together via a first ring 9011; the stator spacer is further provided with a sixth flow channel 706, and the sixth flow channel 706 flows through the first ring 9011 in a radial direction;

[0070] The stator spacer is disposed inside the stator core 1 , and the second flow channel 702 is formed between two adjacent first rods 901 .

[0071] By setting the stator spacer and setting the second flow channel 702 between the two first rods 901, the integrity of the stator core 1 can be ensured, and the stator core 1 can be prevented from being damaged by punching holes to form flow, which is beneficial to ensuring the smoothness of the magnetic circuit in the stator and avoiding excessive local magnetic density.

[0072] The first ring 9011 is provided to fix the plurality of first rods 901 together, to install the stator spacer, and to prevent the first ring 9011 from blocking the second flow channel 702 during the sixth flow channel 706 .

[0073] The number of the first rods 901 is at least three.

[0074] Preferably, Figure 4 , Figure 5 , Figures 7 to 11 As shown, the first end of the first rod 901 faces the outside in the radial direction, the second end of the first rod 901 faces the inside in the radial direction, and a gap is provided between the first end of the first rod 901 and the inner wall surface of the housing;

[0075] The first ring 9011 is located at the first end of the first rod 901 , or the first ring 9011 is located at the second end of the first rod 901 , or the first ring 9011 is fixed to the middle of the first rod 901 .

[0076] The first ring 9011 is located at the first end of the first rod 901. An annular flow channel 203 is formed between the first ring 9011 and the inner wall of the housing. The annular flow channel 203 includes the above-mentioned interval. After the cooling paste enters the annular flow channel 203, it flows along the circumferential flow channel and enters between two adjacent first rods 901 through the sixth flow channel 706. This is conducive to increasing the contact area between the cooling fluid and the inner side of the stator core 1, thereby improving the cooling effect of the inner side of the stator core 1. As the cooling fluid flows, the temperature of the cooling fluid will The temperature of the cooling fluid increases, and after the cooling fluid is injected from the first injection hole 601 and enters the second flow channel 702, it first flows through the outer side of the stator core 1, and then flows to the inner side of the stator core 1. By fixing the first ring 9011 on the first end of the first rod 901 (that is, close to the outer side of the stator core 1), the contact area between the cooling fluid and the inner side of the stator core 1 is increased. Although the temperature of the cooling fluid increases, at the same time, the contact area between the cooling fluid and the stator core 1 is also increased, thereby improving the overall cooling effect on the stator core 1.

[0077] The first circular ring 9011 is located at the second end of the first rod 901. When the cooling fluid enters from the first injection hole 601, the cooling fluid can first fill a second channel 702 (the second channel 702 closest to the first injection hole 601) with cooling paste (at this time, the cooling paste has not yet melted into liquid). Due to the action of the first circular ring 9011, the cooling paste passes through the sixth channel 706 at a slower speed, and the cooling paste flows circumferentially along the intervals into other second channels 702. In this way, the cooling paste can fill each second channel 702 one by one, thereby avoiding the situation where some second channels 702 cannot be fully filled, resulting in uneven cooling of the stator core 1.

[0078] The first circular ring 9011 is fixed at the middle of the first rod 901, and the cooling paste first fills the second flow channel 702 on the outside of the first circular ring 9011, and then a part of the cooling paste enters the inside of the first circular ring 9011 through the sixth flow channel 706, and a part of the cooling paste flows to other second flow channels 702 through the intervals. In this way, it is ensured to a certain extent that each second flow channel 702 has a certain amount of cooling paste to evenly cool the stator core 1, and at the same time, it is ensured that the cooling paste has sufficient contact with the inner side of the stator core 1, thereby cooling the stator core 1 more evenly.

[0079] Preferably, Figure 7 As shown, the stator spacer also includes a second ring 9012. When the first ring 9011 is arranged at the first end of the first rod 901, the second ring 9012 is arranged at the second end of the first rod 901. The first ring 9011 and the second ring 9012 are both provided with a second through hole extending in a radial direction.

[0080] Both ends of the first rod 901 are provided with circular rings, and the first circular ring 9011 and the second circular ring 9012 are provided with second through holes. The second through hole on the first circular ring 9011 is the sixth flow channel 706. In this way, the cooling paste flows along the annular interval after passing through the first injection hole 601, ensuring that the cooling paste can enter all the second flow channels 702 more evenly, and at the same time enter the inner side of the first circular ring 9011 through the second hole on the first circular ring 9011 (that is, the sixth flow channel 706). Under the obstruction of the second circular ring 9012, it is ensured that the cooling flow channel can be filled in each second flow channel 702; the cooling paste enters the gap through the second through hole on the second circular ring 9012. The number of second through holes between two adjacent first rods 901 is at least two.

[0081] In the present application, the inner side refers to the side close to the axis of the rotating shaft 3, and the side away from the axis of the rotating shaft 3 is the outer side.

[0082] Preferably, in the axial direction, the size of the first circular ring 9011 is smaller than that of the first rod 901 , or a first through hole is provided on the first circular ring 9011 .

[0083] In the axial direction, Fig. 9 and Fig.11 As shown, the size of the first ring 9011 is smaller than that of the first rod 901, and the cooling fluid flows through both sides of the first ring 9011 (in the axial direction, both sides of the first ring 9011), which can increase the contact area between the cooling fluid and the stator core 1, thereby improving the cooling efficiency of the stator core 1; the flow resistance of the cooling fluid is also small, which is conducive to improving the flow speed of the cooling fluid. There are at least two first through holes between two adjacent first rods 901.

[0084] like Figure 8 and Fig.10 As shown, a first through hole is provided on the first circular ring 9011 , and the first circular ring 9011 is in contact with the stator core 1 , which has a supporting and flattening effect on the stator core 1 , and is beneficial to the production of the stator core 1 .

[0085] Furthermore, through holes may be provided on the first circular ring 9011 and the second circular ring 9012 , and the size of the second circular ring 9012 in the axial direction may be smaller than the size of the first rod 901 .

[0086] Preferably, Figure 4 , Figure 5 Figure 12-16 The motor further comprises a rotor spacer, the rotor spacer comprises a plurality of second rods 902 extending in a radial direction, the plurality of second rods 902 being fixed together via a third ring 9021; the rotor spacer is further provided with a seventh flow channel 707, the seventh flow channel 707 flows through the third ring 9021 in a radial direction;

[0087] The rotor spacer is disposed inside the rotor core 2 , and a fifth flow channel 705 is formed between two adjacent second rods 902 . The third flow channel 703 corresponds to the fifth flow channel 705 in a one-to-one manner.

[0088] The provision of the second rods 902 is conducive to ensuring the integrity of the rotor core 2. The provision of the third ring 9021 is conducive to ensuring the stability of the fixing of the plurality of second rods 902.

[0089] Furthermore, the third flow channel 703 corresponds to the fifth flow channel 705 one by one. When the rotating shaft 3 rotates, the cooling paste can flow more evenly around and evenly enter the fifth flow channel 705 through the third flow channel 703.

[0090] In the axial direction, the fifth flow channel 705 is staggered with the second flow channel 702, that is, the fifth flow channel 705 is connected to the second flow channel 702 through an air gap 4 extending in the axial direction, thereby increasing the cooling area of ​​the cooling fluid on the rotor core 2 and the stator core 1 and improving the cooling effect.

[0091] The number of the second rods 902 is at least three.

[0092] Preferably, Figure 13-16 As shown, the first end of the second rod 902 faces the outside in the radial direction, and the second end of the second rod 902 faces the inside in the radial direction;

[0093] The third ring 9021 is located at the first end of the second rod 902 , or the third ring 9021 is located at the second end of the second rod 902 , or the third ring 9021 is fixed to the middle of the second rod 902 .

[0094] The third ring 9021 is located at the first end of the second rod 902 , and the third ring 9021 blocks the cooling paste. After the cooling paste enters the fifth flow channel 705 from the third flow channel 703 , it gradually fills up the fifth flow channel 705 , thereby improving the cooling effect on the rotor core 2 .

[0095] The third ring 9021 is located at the second end of the second rod 902, which increases the contact area between the cooling paste and the outer part of the rotor core 2. The cooling paste can increase its temperature while flowing from the inside to the outside. The contact area between the cooling paste with a higher temperature and the rotor core 2 is increased, which is beneficial to timely cool down the outer part of the rotor core 2 and ensure the overall temperature balance of the rotor core 2.

[0096] The third ring 9021 is fixed at the middle of the second rod 902 , and the cooling paste fills the space between two adjacent second rods 902 on the inner side of the third ring 9021 , and the contact area with the rotor core 2 on the outer side of the third ring 9021 is larger, thereby improving the cooling effect on the rotor core 2 .

[0097] Preferably, Fig.12 , Fig.13 and Fig.15 As shown, the rotor spacer also includes a fourth ring 9022 and an eighth flow channel 708 flowing through the fourth ring 9022 along the radial direction. The fourth ring 9022 and the third ring 9021 are respectively arranged at two ends of the second rod 902, and the fourth ring 9022 and the third ring 9021 are both provided with a fourth through hole extending along the radial direction.

[0098] By setting the third ring 9021, the third ring 9021 and the fourth ring 9022 are set at both ends of the second rod 902. Since the rotor core 2 is in a rotating state, the ring located on the inner side of the second rod 902 can prevent the cold fluid from flowing too fast to the outside under the action of centrifugal force, resulting in insufficient contact between the cooling fluid and the rotor core 2 and reduced cooling effect; similarly, the ring located on the outer side of the second rod 902 can also slow down the flow rate of the cooling fluid, thereby allowing the cooling fluid to fully contact with the rotor core 2, avoiding that part of the rotor core 2 cannot contact with the cooling fluid and has too high a temperature; by setting the above-mentioned third ring 9021 and fourth ring 9022, the cooling effect on the rotor core 2 is improved.

[0099] There are at least two fourth through holes between two adjacent second rods 902 .

[0100] Furthermore, the third circular ring 9021 is arranged on the inner side, and the fourth circular ring 9022 is arranged on the outer side.

[0101] Preferably, in the axial direction, the size of the third circular ring 9021 is smaller than that of the second rod 902 , or a third through hole is provided on the third circular ring 9021 .

[0102] In the axial direction, Fig.14 and Fig.16 As shown, the size of the third ring 9021 is smaller than that of the second rod 902 , and the cooling fluid flows through both sides (axial direction) of the third ring 9021 , which is beneficial to increase the contact area between the cooling fluid and the rotor core 2 and improve the cooling efficiency of the rotor core 2 .

[0103] The third ring 9021 is provided with a third through hole. Fig.13 and Fig.15 As shown, the resistance to the cooling fluid is increased to prevent the cooling fluid from flowing outward too quickly under the action of the centrifugal force generated by the rotation.

[0104] There are at least two third through holes between two adjacent second rods 902 .

[0105] Furthermore, through holes may be provided on the third circular ring 9021 and the fourth circular ring 9022 , and the size of the third circular ring 9021 and the fourth circular ring 9022 in the axial direction may be smaller than the size of the second rod 902 .

[0106] The present invention also provides a motor system, including a pressure pump, a cooling container and the motor, wherein cooling paste is arranged in the cooling container, and when a second injection hole 602 and a discharge hole 803 are provided, the inlet of the pressure pump is connected with the outlet of the cooling container, the outlet of the pressure pump is connected with both the first injection hole 601 and the second injection hole 602, and the discharge hole 803 is connected with the inlet of the cooling container.

[0107] The motor is cooled by using cooling paste, and the cooling paste is pressurized by a pressure pump to promote the cooling paste to flow in the motor, so that the cooling paste can flow to every corner of the motor, thereby improving the cooling effect on the motor. The process of melting into liquid after absorbing heat can also absorb heat, further improving the cooling effect. The cooling fluid flowing out of the discharge hole 803 enters the cooling container again for cooling, and the cooling fluid cooled into a paste enters the motor again from the first injection hole 601 and the second injection hole 602 under the action of the pressure pump.

[0108] The pressure pump may be a plunger pump.

[0109] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A motor, comprising a housing, a stator core (1), a rotor core (2) and a rotating shaft (3) located in the housing, wherein the rotor core (2) is sleeved on the rotating shaft (3), the stator core (1) surrounds the rotor core (2) and is fixed to the inner circumferential wall of the housing, an air gap (4) is provided between the rotor core (2) and the stator core (1), and characterized in that: The stator core (1) is provided with a winding (101), and the housing is further provided with an annular partition (5), the annular partition (5) comprising an annular partition plate (501) and a cylindrical partition plate (502), the outer edge of the annular partition plate (501) being fixed to the inner wall surface of the housing, the cylindrical partition plate (502) being connected to the inner edge of the annular partition plate (501), and a receiving cavity (503) being formed between the cylindrical partition plate (502), the annular partition plate (501) and the wall surface of the housing, and the portion of the winding (101) protruding from the stator core (1) being located in the receiving cavity (503); The housing is provided with a first injection hole (601), and the outer peripheral surface of the stator core (1) is provided with a first flow channel (701), and one end of the first flow channel (701) is connected with the first injection hole (601) and the accommodating cavity (503).

2. The motor according to claim 1, characterized in that An air gap (4) is provided between the stator core (1) and the rotor core (2), and a second flow channel (702) communicating with the first flow channel (701) and the air gap (4) is provided inside the stator core (1).

3. The motor according to claim 1, characterized in that The rotating shaft (3) is provided with a second injection hole (602), a third flow channel (703) is provided inside the rotating shaft (3), a fourth flow channel (704) is provided inside the rotor core (2) and penetrates the rotor core (2) in an axial direction, and the third flow channel (703) is connected to the second injection hole (602) and the fourth flow channel (704).

4. The motor according to claim 1, characterized in that Baffles (201) are provided at both axial ends of the rotor core (2); in the axial direction, the baffles (201) are opposite to the cylindrical partition (502); a preset gap (202) is provided between the baffles (201) and the cylindrical partition (502).

5. The motor according to any one of claims 1 to 4, characterized in that: End covers (801) are provided at both ends of the casing, one of the end covers (801) is a first end cover (801), an annular partition (501) adjacent to the first end cover (801) is a first partition, a discharge channel (802) is provided between the first end cover (801) and the first partition, and the casing is provided with a discharge hole (803), and the discharge hole (803) is connected to the discharge channel (802).

6. The motor according to claim 5, characterized in that When a third flow channel (703) and a fourth flow channel (704) are provided, at least one of the first flow channel (701), the third flow channel (703) and the fourth flow channel (704) is provided with a spoiler (804).

7. The motor according to claim 2, characterized in that The motor further comprises a stator spacer, the stator spacer comprising a plurality of first rods (901) extending in a radial direction, the plurality of first rods (901) being fixed together via a first circular ring (9011); the stator spacer is further provided with a sixth flow channel (706), the sixth flow channel (706) flowing through the first circular ring (9011) in a radial direction; The stator spacer is arranged inside the stator core (1), and the second flow channel (702) is formed between two adjacent first rods (901).

8. The motor according to claim 7, characterized in that The first end of the first rod (901) faces outward in the radial direction, the second end of the first rod (901) faces inward in the radial direction, and a gap is provided between the first end of the first rod (901) and the inner wall surface of the housing; The first circular ring (9011) is located at the first end of the first rod (901), or the first circular ring (9011) is located at the second end of the first rod (901), or the first circular ring (9011) is fixed at the middle of the first rod (901).

9. The motor according to claim 8, characterized in that The stator spacer also includes a second circular ring (9012); when the first circular ring (9011) is arranged at the first end of the first rod (901), the second circular ring (9012) is arranged at the second end of the first rod (901); and the first circular ring (9011) and the second circular ring (9012) are both provided with a second through hole extending in a radial direction.

10. The motor according to claim 8, characterized in that In the axial direction, the size of the first circular ring (9011) is smaller than the size of the first rod (901), or a first through hole is provided on the first circular ring (9011).

11. The motor according to claim 3, characterized in that The motor further comprises a rotor spacer, the rotor spacer comprising a plurality of second rods (902) extending in a radial direction, the plurality of second rods (902) being fixed together via a third ring (9021); the rotor spacer is further provided with a seventh flow channel (707), the seventh flow channel (707) flowing through the third ring (9021) in a radial direction; The rotor spacer is arranged inside the rotor core (2), a fifth flow channel (705) is formed between two adjacent second rods (902), and the third flow channel (703) corresponds to the fifth flow channel (705) one by one.

12. The motor according to claim 11, characterized in that The first end of the second rod (902) faces the outside in the radial direction, and the second end of the second rod (902) faces the inside in the radial direction; The third ring (9021) is located at the first end of the second rod (902), or the third ring (9021) is located at the second end of the second rod (902), or the third ring (9021) is fixed to the middle of the second rod (902).

13. The motor according to claim 11, characterized in that The rotor spacer also includes a fourth circular ring (9022) and an eighth flow channel (708) flowing through the fourth circular ring (9022) in a radial direction. The fourth circular ring (9022) and the third circular ring (9021) are respectively arranged at two ends of the second rod (902). The fourth circular ring (9022) and the third circular ring (9021) are both provided with a fourth through hole extending in the radial direction.

14. The motor according to claim 11 or 12, characterized in that: In the axial direction, the size of the third circular ring (9021) is smaller than the size of the second rod (902), or a third through hole is provided on the third circular ring (9021).

15. A motor system, characterized in that: It comprises a pressure pump, a cooling container and the motor according to any one of claims 1 to 14, wherein cooling paste is arranged in the cooling container, and when a second injection hole (602) and a discharge hole (803) are provided, the inlet of the pressure pump is connected with the outlet of the cooling container, the outlet of the pressure pump is connected with both the first injection hole (601) and the second injection hole (602), and the discharge hole (803) is connected with the inlet of the cooling container.

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