Motor bearing, motor, air compressor and air blower

Abstract

The invention provides a motor bearing, a motor, an air compressor and an air blower, the motor bearing is provided with a first side opposite to a stator coil of the motor in the axial direction, the motor bearing is internally provided with a heat dissipation air channel, and the heat dissipation air channel is provided with a first air inlet and a first air outlet located in the first side; the motor bearing is provided with a shunting structure, the shunting structure is used for at least shunting incoming wind into first wind and second wind, and guiding the first wind to the first side, so that the first wind flows out from the first side; and the shunting structure further guides the second air to the first air inlet of the heat dissipation air duct, so that the second air flows out from the first air outlet. According to the technical scheme of the invention, the first wind and the second wind shunted by the shunting structure cooperate with each other, so that the stator coil and the motor bearing can be effectively cooled.

Description

Technical Field

[0001] The invention belongs to the technical field of motor heat dissipation, and in particular relates to a motor bearing, a motor, an air compressor and a blower. Background Art

[0002] Magnetic levitation high-speed motors have now become the focus of competition in all walks of life, especially in the fields of air compressors and blowers. Magnetic levitation technology has inherent advantages in oil-free and energy-saving equipment maintenance, and its development trend in the industry is becoming increasingly obvious.

[0003] The speed of magnetic levitation high-speed motors can generally reach more than 35,000 rpm, the power exceeds 100 kW, the power density of the whole machine is high, the internal stator and rotor are seriously heated, and the heat dissipation problem has become a pain point in the industry. Various manufacturers have invested a lot of time and resources to solve the heat problem. Among them, the stator coil and motor bearing inside the motor both generate a lot of heat, and how to effectively dissipate the heat of the two has become a technical problem that needs to be solved in this field. Summary of the invention

[0004] Therefore, the present invention provides a motor bearing, a motor, an air compressor and a blower, and the main technical problem to be solved is: how to dissipate the heat of the stator windings and the motor bearing inside the motor.

[0005] In order to solve the above problems, the present invention provides a motor bearing, wherein the motor bearing has a first side in the axial direction for being opposite to the stator coil of the motor, and the motor bearing has a heat dissipation duct inside, wherein the heat dissipation duct has a first air inlet and a first air outlet located on the first side;

[0006] In which, a diversion structure is provided on the motor bearing, and the diversion structure is used to divert the incoming wind into at least a first wind and a second wind, and guide the first wind to the first side so that the first wind flows out from the first side; and the diversion structure also guides the second wind to the first air inlet of the heat dissipation air duct so that the second wind flows out from the first air outlet.

[0007] In some embodiments, the diversion structure includes a diversion groove arranged on the radial outer side wall of the motor bearing, and the middle part of the bottom surface of the diversion groove has a protrusion, and the protrusion divides the diversion groove into a first groove located on one side and a second groove located on the other side. The diversion structure diverts the incoming wind into at least a first wind and a second wind through the protrusion, and guides the first wind to the first side through the first groove, and guides the second wind to the first air inlet of the heat dissipation air duct through the second groove.

[0008] In some embodiments, the first groove passes through the first side, and the bottom surface of the first groove extends from the top of the protrusion to the first side along the axial direction of the motor bearing; and the distance between the bottom surface of the first groove and the axis of the motor bearing is smaller as it is closer to the first side.

[0009] In some embodiments, the first air inlet is located on the radial outer side wall of the motor bearing, and the second groove extends to the first air inlet; wherein, the bottom surface of the second groove extends from the top of the raised portion to the opening edge of the first air inlet, and the distance between the second bottom surface and the axis of the motor bearing is smaller as it is closer to the opening edge of the first air inlet.

[0010] In some embodiments, the motor bearing comprises an end cover portion and a bearing seat disposed on one side of the end cover portion, and a side of the bearing seat facing away from the end cover portion is the first side;

[0011] There is a gap between the end cover and the bearing seat, and the two are connected by a support column; wherein the gap constitutes a part of the heat dissipation duct, and the opening of the gap on the radial outer side wall of the motor bearing forms the first air inlet of the heat dissipation duct.

[0012] In some embodiments, the motor bearing has an axial hole that passes through the end cover and the bearing seat; wherein,

[0013] The shaft hole constitutes a part of the heat dissipation air duct, and the first air outlet is arranged on the end surface of the first side and is connected to the shaft hole;

[0014] And / or, the shaft hole on the bearing seat has a groove section, and a heat dissipation hole penetrating the groove section is provided on one side of the bearing seat close to the end cover portion, so that the wind in the interval can flow into the groove section through the heat dissipation hole.

[0015] The present invention further provides a motor, comprising a housing and any one of the motor bearings described above; the housing is provided with an air inlet structure and an air outlet structure, the housing draws air into the interior through the air inlet structure, and discharges the internal air through the air outlet structure;

[0016] Wherein, the air inlet structure has an air outlet a, and the air inlet structure guides the wind to the inside of the casing through the air outlet a; the air outlet a is opposite to the diversion structure to guide the wind to the diversion structure.

[0017] In some embodiments, the air inlet structure includes a first air guide ring sleeved on the outer side wall of the casing, the first air guide ring cover is arranged on the first area of ​​the outer side wall of the casing, and a first annular air inlet cavity is formed between the first area and the first air guide ring, a second a air inlet communicating with the annular air inlet cavity is arranged on the first air guide ring, and the a air outlet is arranged on the first area; wherein the number of the a air outlets is more than two, and they are arranged around the axis of the motor; the number of the diversion structures is equal to the number of the a air outlets, and they correspond one to one;

[0018] Alternatively, the air inlet structure has a second b air inlet, which is arranged on the side wall of the casing and has the same opening as the a air outlet; wherein the number of the second b air inlet is single.

[0019] In some embodiments, the motor further comprises another motor bearing, wherein the another motor bearing and the motor bearing are both arranged on opposite sides of the stator coil package along the axial direction of the motor;

[0020] Wherein, the air inlet structure also has an air outlet b, and the air inlet structure also guides the air to the inside of the casing through the air outlet b;

[0021] A guide structure is provided on the other motor bearing, and the guide structure is opposite to the b air outlet to receive wind from the b air outlet and guide the wind to the side of the stator coil away from the motor bearing.

[0022] In some embodiments, the guide structure includes a guide surface arranged on the radial outer side wall of the other motor bearing, so as to receive the wind from the b air outlet through the guide surface and guide the wind to the side of the stator winding away from the motor bearing.

[0023] In some embodiments, the air inlet structure includes a second air guide ring mounted on the outer wall of the casing, the second air guide ring cover is arranged on the second area of ​​the outer wall of the casing, and a second annular air inlet cavity is formed between the second area, the second air guide ring is provided with a third air inlet connected to the annular air inlet cavity, and the b air outlet is arranged on the second area; wherein the number of the b air outlets is more than two, and they are arranged around the axis of the motor.

[0024] In some embodiments, the air outlet structure includes a second air outlet disposed on the second air guide ring to discharge the air inside the casing through the second air outlet; wherein the second air outlet and the third air inlet are both located on opposite sides of the motor in the radial direction.

[0025] In some embodiments, the interior of the casing has a chamber on the side of the stator winding away from the motor bearing, and the air outlet structure includes a second air outlet arranged on the cavity wall of the chamber to discharge the air inside the casing through the second air outlet; wherein the number of the second air outlets may be more than two, and they are arranged around the axis of the motor.

[0026] In some embodiments, the casing is cylindrical, and a spiral water channel is provided in the wall thickness of the casing.

[0027] The present invention also provides an air compressor, which includes any one of the motor bearings described above, or includes any one of the motors described above.

[0028] The present invention also provides a blower, which includes any one of the motor bearings described above, or includes any one of the motors described above.

[0029] The motor bearing, motor, air compressor and blower provided by the present invention have the following beneficial effects:

[0030] 1. Since the first side of the motor bearing is opposite to the stator winding package of the motor, the first wind diverted by the diversion structure will flow to the stator winding package after flowing out from the first side to dissipate the heat of the stator winding package; and the second wind diverted by the diversion structure will also flow to the stator winding package after flowing out from the first side through the heat dissipation duct to dissipate the heat of the stator winding package; and the second wind can also dissipate the heat of the motor bearing when flowing through the heat dissipation duct. Among them, the first wind diverted by the diversion structure and the second wind cooperate to effectively dissipate the heat of the stator winding package and the motor bearing.

[0031] 2. Since air outlet a and air outlet b are arranged around the axis of the motor, air can enter along the circumference of the casing to form a ring-shaped cooling air outlet design, so that the cooling air flow entering the motor is larger and more uniform, thereby improving the heat dissipation effect inside the motor.

[0032] 3. The shunt structure on the motor bearing cooperates with the guide structure on the other motor bearing, and the two guide the wind to the opposite sides of the stator winding package respectively, so that the stator winding package can be fully cooled, thereby improving the heat dissipation effect of the stator winding package.

[0033] 4. Compared with the S-shaped water channel in the prior art, the spiral water channel of the present invention can greatly reduce the flow resistance, cover the entire stator area, and effectively dissipate the heat of the stator core. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 is a structural schematic diagram of a motor bearing provided by an embodiment of the present invention;

[0036] Figure 2 It is a top view of the motor bearing;

[0037] Figure 3 yes Figure 2 Sectional view along AA direction;

[0038] Figure 4 is a structural schematic diagram of a motor provided by an embodiment of the present invention;

[0039] Figure 5 yes Figure 4 Cross-sectional view of the motor

[0040] Figure 6 is a schematic structural diagram of a casing provided by an embodiment of the present invention;

[0041] Figure 7 is a schematic structural diagram of another bearing provided by an embodiment of the present invention;

[0042] Figure 8 It is a schematic diagram of the structure of another motor provided by an embodiment of the present invention.

[0043] The accompanying drawings are marked as follows:

[0044] 1. Second a air inlet; 2. Water channel inlet; 3. Water channel outlet; 4. Third air inlet; 5. Second air outlet; 6. Spiral water channel; 7. Stator coil; 8. Rotor; 9. Motor bearing; 9a. Interval; 10. Another motor bearing; 11. a air outlet; 11a. Second b air inlet; 12. b air outlet; 13. Drainage groove; 1a. Diversion structure; 13a. Bottom of the first groove; 13b. Bottom of the second groove; 14. Cooling air duct; 15. Guide structure; 16. First air guide ring; 17. Second air guide ring; 18. Casing; 18a. First area; 18b. Second Area; 19, guide ring; 71, primary side; 72, secondary side; 90, first side; 91, end cover; 92, bearing seat; 93, support column; 130, raised portion; 131, first groove; 132, second groove; 141, first air inlet; 142, first air outlet; 143, heat dissipation hole; 151, guide surface; 161, first annular air inlet cavity; 171, second annular air inlet cavity; 181, chamber; 901, axial hole; 901a, groove section; 1411, opening edge of the first air inlet; m, axis of motor bearing; L1, first wind; L2, second wind. 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 1-5 As shown, according to an embodiment of the present invention, a motor bearing 9 is provided, and the motor bearing 9 has a first side 90 in the axial direction for being opposite to the stator coil 7 of the motor. A heat dissipation duct 14 is provided inside the motor bearing 9. The heat dissipation duct 14 has a first air inlet 141 and a first air outlet 142 located on the first side 90.

[0050] Among them, the motor bearing 9 is provided with a diversion structure 1a, such as Figure 3 As shown, the diversion structure 1a is used to divert the incoming wind into at least a first wind L1 and a second wind L2. The diversion structure 1a is used to guide the first wind L1 to the first side 90, so that the first wind L1 flows out from the first side 90. The diversion structure 1a is also used to guide the second wind L2 to the first air inlet 141 of the heat dissipation air duct, so that the second wind L2 flows out from the first air outlet 142. Since the first air outlet 142 is located on the first side 90 of the motor bearing, the wind from the first air outlet 142 of the heat dissipation air duct 14 also flows out from the first side 90 of the motor bearing.

[0051] In the above example, since the first side 90 of the motor bearing is opposite to the stator coil 7 of the motor, the first wind L1 diverted by the diverter structure 1a will flow to the stator coil 7 after flowing out from the first side 90, dissipating the stator coil 7; and the second wind L2 diverted by the diverter structure 1a will also flow to the stator coil 7 after flowing out from the first side 90 through the heat dissipation duct 14, dissipating the stator coil 7; and the second wind L2 can also dissipate the heat of the motor bearing 9 when flowing through the heat dissipation duct 14. Among them, the first wind L1 and the second wind L2 diverted by the diverter structure 1a cooperate to effectively dissipate the heat of the stator coil 7 and the motor bearing 9.

[0052] In order to realize the function of the aforementioned shunt structure 1a, in some embodiments, as Figure 3 As shown, the aforementioned diversion structure 1a may include a diversion groove 13 disposed on the radial outer side wall of the motor bearing 9, and a protrusion 130 is provided in the middle of the bottom surface of the diversion groove 13, and the protrusion 130 divides the diversion groove 13 into a first groove 131 located on one side and a second groove 132 located on the other side. The diversion structure 1a diverts the incoming wind into at least the aforementioned first wind L1 and second wind L2 through the protrusion 130. The diversion structure 1a guides the first wind L1 to the first side 90 through the first groove 131, so that the first wind L1 flows out from the first side 90. And the diversion structure 1a guides the second wind L2 to the first air inlet 141 of the heat dissipation air duct through the second groove 132, so that the second wind L2 flows out from the first air outlet 142.

[0053] In the above example, when the incoming wind blows toward the raised portion 130 in the middle of the bottom surface of the guide groove 13, it can be diverted by the raised portion 130 and flow along the first groove 131 toward the first side 90 of the motor bearing, and flow along the second groove 132 toward the first air inlet 141 of the heat dissipation duct, thus achieving the function of the aforementioned diversion structure 1a. The guide groove 13 has the effect of gathering wind and diverting the incoming wind.

[0054] In order to allow the first channel 131 to direct the first wind L1 to the first side 90, in some embodiments, as Figure 1-3 As shown, the aforementioned first groove 131 passes through the first side 90. The bottom surface 13a of the first groove extends from the top of the protrusion 130 along the axial direction of the motor bearing 9 to the first side 90 of the motor bearing. And the distance between the bottom surface 13a of the first groove and the axis m of the motor bearing is smaller as it is closer to the first side 90.

[0055] In the above example, since the distance between the bottom surface 13a of the first groove and the axis m of the motor bearing becomes smaller as it approaches the first side 90, the bottom surface 13a of the first groove is an inclined surface inclined toward the first side 90, which is beneficial for the first groove 131 to guide the first wind L1 to the first side 90 of the motor bearing.

[0056] In order to allow the second slot 132 to guide the second air flow L2 to the first air inlet 141 of the heat dissipation air duct, in some embodiments, such as Figure 3 As shown, the aforementioned first air inlet 141 is located on the radial outer side wall of the motor bearing 9, and the second groove 132 extends to the first air inlet 141. The bottom surface 13b of the second groove extends from the top of the protrusion 130 to the opening edge 1411 of the first air inlet, and the distance between the second bottom surface and the axis m of the motor bearing is smaller as it is closer to the opening edge 1411 of the first air inlet.

[0057] In the above example, since the distance between the bottom surface 13b of the second groove and the axis m of the motor bearing becomes smaller as it approaches the opening edge 1411 of the first air inlet, the bottom surface 13b of the second groove is an inclined surface inclined toward the opening edge 1411 of the first air inlet, which is beneficial for the second groove 132 to guide the second air L2 to the first air inlet 141.

[0058] In some embodiments, Figure 1-3 As shown, the aforementioned motor bearing 9 has an end cover portion 91 and a bearing seat 92 arranged on one side of the end cover portion 91. The side of the bearing seat 92 facing away from the end cover portion 91 is the aforementioned first side 90. There is a gap 9a between the end cover portion 91 and the bearing seat 92, and the two are connected by a support column 93. One end of the support column 93 can be integrally formed on the end cover portion 91, and the other end can be integrally formed on the bearing seat 92. Among them, the gap 9a between the end cover portion 91 and the bearing seat 92 constitutes a part of the aforementioned heat dissipation duct 14, and the opening of the gap 9a on the radial outer side wall of the motor bearing 9 forms the first air inlet 141 of the heat dissipation duct.

[0059] In the above example, by forming a gap 9 a between the end cover 91 and the bearing seat 92 , it is beneficial to dissipate heat inside the motor bearing 9 .

[0060] In some embodiments, Figure 3 As shown, the aforementioned motor bearing 9 has an axial hole 901 that penetrates the end cover 91 and the bearing seat 92. The axial hole 901 constitutes a part of the aforementioned heat dissipation duct 14. The aforementioned first air outlet 142 is arranged on the end surface of the first side 90 and is connected to the axial hole 901, so that the wind in the axial hole 901 can flow out from the first air outlet 142, achieving the effect of the heat dissipation duct 14 discharging air from the first air outlet 142.

[0061] In some embodiments, Figure 3 As shown, the shaft hole 901 on the aforementioned bearing seat 92 has a groove section 901a, and a heat dissipation hole 143 penetrating the groove section 901a is provided on one side of the bearing seat 92 close to the end cover portion 91, so that the wind in the interval 9a can flow into the groove section 901a through the heat dissipation hole 143.

[0062] In the above example, the heat dissipation area inside the motor bearing 9 is increased by the designed heat dissipation holes 143 and the groove section 901 a, which is beneficial to the heat dissipation of the motor bearing 9 .

[0063] In some embodiments, the first air inlet 141 of the aforementioned heat dissipation duct can be an annular opening arranged around the axis m of the motor bearing. This can improve the air intake efficiency of the first air inlet 141 and allow wind to enter the interior of the motor bearing 9 along the circumferential direction, which is beneficial to improving the heat dissipation of the motor bearing 9.

[0064] like Figure 4-5 As shown, the present invention also provides a motor, which may include a housing 18 and any of the motor bearings 9 described above. The housing 18 is provided with an air inlet structure and an air outlet structure, and the housing 18 draws air into the interior through the air inlet structure, and discharges the internal air through the air outlet structure. The air inlet structure has an air outlet a 11, and the air inlet structure draws the air into the interior of the housing 18 through the air outlet a 11. The air outlet a 11 is opposite to the diversion structure 1a to draw the wind into the diversion structure 1a.

[0065] In the above example, wind can enter the housing 18 from the air inlet structure, dissipate heat to the stator coil 7, rotor 8 and motor bearing 9 inside the motor, and then be discharged from the air outlet structure. Among them, since the air outlet 11 of the air inlet structure is opposite to the diversion structure 1a, it is beneficial to directly guide the wind to the diversion structure 1a, so that the diversion structure 1a diverts the incoming wind.

[0066] In order to realize the function of the aforementioned air inlet structure, in the first example, as Figure 4-5 As shown, the aforementioned air inlet structure may include a first air guide ring 16 sleeved on the outer wall of the casing 18. The first air guide ring 16 is covered on the first area 18a of the outer wall of the casing 18, and a first annular air inlet cavity 161 is formed between the first air guide ring 16 and the first area 18a. The first air guide ring 16 is provided with a second a air inlet 1 connected to the annular air inlet cavity, and the aforementioned a air outlet 11 is arranged on the first area 18a. Among them, the number of a air outlets 11 is more than two, and they are arranged around the axis of the motor. The number of the aforementioned diversion structures 1a is equal to the number of a air outlets 11, and they correspond one to one.

[0067] In the first example mentioned above, wind enters the first annular air inlet cavity 161 from the second a air inlet 1, and then enters the casing 18 from the a air outlet 11. Since the a air outlet 11 is arranged around the axis of the motor, air can enter along the circumference of the casing 18 to form an annular cooling air outlet design. In this way, the cooling air flow entering the interior of the motor is larger and more uniform, thereby improving the heat dissipation effect inside the motor.

[0068] In the first example mentioned above, the number of the second air inlet a 1 can be single, which can simplify the air inlet structure and reduce costs.

[0069] In order to realize the function of the aforementioned air inlet structure, in the second example, as Figure 8 As shown, the aforementioned air inlet structure may have a second air inlet b 11a, which is arranged on the side wall of the housing 18 and is the same opening as the air outlet a 11. The number of the second air inlet b 11a may be single.

[0070] In the second example described above, the air intake structure takes in air through a single air inlet and outlet, which can simplify the air intake structure and reduce costs.

[0071] In some embodiments, Figure 5 As shown, the aforementioned motor may further include another motor bearing 10, and the another motor bearing 10 and the aforementioned motor bearing 9 are both arranged on opposite sides of the stator winding package 7 along the axial direction of the motor. Among them, the aforementioned air inlet structure also has a b air outlet 12, and the air inlet structure also guides the wind to the inside of the housing 18 through the b air outlet 12. The aforementioned another motor bearing 10 is provided with a guide structure 15, which is opposite to the b air outlet 12 to receive the wind from the b air outlet 12 and guide the wind to the side of the stator winding package 7 away from the aforementioned motor bearing 9.

[0072] In the above example, the guide structure 15 cooperates with the diverter structure 1a on the aforementioned motor bearing 9, and both guide the wind to the opposite sides of the stator winding package 7 respectively, so that the stator winding package 7 can be fully cooled, thereby improving the heat dissipation effect of the stator winding package 7.

[0073] In order to realize the function of the aforementioned guide structure 15, in some embodiments, as Figure 7 As shown, the aforementioned guide structure 15 may include a guide surface 151 arranged on the radial outer side wall of another motor bearing 10 to receive the wind from the b air outlet 12 through the guide surface 151 and guide the wind to the side of the stator winding 7 away from the motor bearing 9.

[0074] In a specific application example, Figure 7 As shown, the aforementioned other motor bearing 10 may be provided with a guide ring 19 , and the guide ring 19 may be integrally formed on the other motor bearing 10 , and the guide ring has the aforementioned guide surface 151 .

[0075] In some embodiments, Figure 5As shown, the aforementioned air inlet structure may also include a second air guide ring 17 sleeved on the outer wall of the housing 18. The second air guide ring 17 is covered on the second area 18b of the outer wall of the housing 18, and a second annular air inlet cavity 171 is formed between the second air guide ring 17 and the second area 18b. The second air guide ring 17 is provided with a third air inlet 4 connected to the annular air inlet cavity. The aforementioned b air outlet 12 is arranged on the second area 18b. Among them, the number of b air outlets 12 is more than two, and they are arranged around the axis of the motor.

[0076] In the above example, wind enters the second annular air inlet cavity 171 from the third air inlet 4, and then enters the casing 18 from the b air outlet 12. Since the b air outlet 12 is arranged around the axis of the motor, air can enter along the circumference of the casing 18 to form an annular cooling air outlet design. In this way, the cooling air flow entering the interior of the motor is larger and more uniform, thereby improving the heat dissipation effect inside the motor.

[0077] In some embodiments, Figure 5 As shown, the number of the third air inlet 4 can be single, which can simplify the air inlet structure and reduce costs.

[0078] In some embodiments, Figure 5 As shown, the aforementioned air outlet structure may include a second air outlet 5 disposed on the second air guide ring 17 to discharge the air inside the housing 18 through the second air outlet 5. The second air outlet 5 and the aforementioned third air inlet 4 are both located on opposite sides of the motor in the radial direction.

[0079] In the above example, the second air guide ring 17 has a dual function. It can cooperate with the third air inlet 4 to intake air into the casing 18, and can also cooperate with the second air outlet 5 to discharge the air in the casing 18. This can simplify the air inlet and outlet structure and reduce costs.

[0080] In order to realize the function of the aforementioned air outlet structure, in another example, as Figure 8 As shown, the aforementioned casing 18 has a chamber 181 inside on the side of the stator winding 7 facing away from the motor bearing 9, and the air outlet structure may include a second air outlet 5 arranged on the cavity wall of the chamber 181 to discharge the air inside the casing 18 through the second air outlet 5.

[0081] In the above example, wind enters the housing 18 from the air inlet structure, dissipates heat inside the motor, and then flows out directly from the second air outlet 5. There may be more than two second air outlets 5, which are arranged around the axis of the motor.

[0082] In some embodiments, Figure 5As shown, the aforementioned housing 18 may be cylindrical, and a spiral water channel 6 is provided in the wall thickness of the housing 18. Compared with the S-shaped water channel in the prior art, the spiral water channel 6 can greatly reduce the flow resistance, cover the entire stator area, and effectively dissipate heat from the stator core.

[0083] It should be noted here that: Figure 5 As shown, one end of the spiral water channel 6 has a water channel inlet 2, and the other end of the spiral water channel 6 has a water channel outlet 3.

[0084] In some embodiments, the aforementioned motor may be a magnetic levitation high-speed motor. Among them, the cooling channel design of the motor in the prior art is complex and unreasonable. The cooling channels in the motor of the present invention, such as the spiral water channel 6, the first air guide ring 16 and the second air guide ring 17, are basically designed in a circumferential ring shape, without specific angle position requirements, which is convenient for design and processing. Through this annular channel design, the cooling medium can fully and evenly enter the circumferential direction channel, and the internal cooling of the motor is more uniform, which minimizes the local high temperature caused by insufficient cooling air volume in the stator and rotor. Among them, for the problem of high temperature of the stator and rotor, the difficulty of heat dissipation of the stator coil 7, and serious heat generation of the rotor 8, the present invention guides the cooling air to the stator coil 7, fully dissipates the heat of the stator coil 7, and evenly guides the cooling air to the stator coil 7 through the first air guide ring 16 and the second air guide ring 17, which greatly reduces the problem of local temperature rise caused by uneven cooling air volume.

[0085] The heat dissipation process of the motor of the present invention is as follows:

[0086] The side of the stator winding package 7 close to the motor bearing 9 is the primary side 71, and the side of the stator winding package 7 away from the motor bearing 9 is the secondary side 72. The wind enters the interior of the motor through the a outlet 11 and the b outlet 12 on the housing 18. Among them, the a outlet 11 is opposite to the diversion structure 1a, and the wind from the a outlet 11 blows toward the raised portion 130 in the middle of the bottom surface of the guide groove 13. The wind is divided into the first wind L1 and the second wind L2 by the raised portion 130. The first wind L1 is guided to the first side 90 through the first groove 131, and then flows to the primary side 71 of the stator winding package. The second wind L2 is guided to the heat dissipation duct 14 inside the motor bearing 9 through the second groove 132 to dissipate the heat inside the motor bearing 9, and finally flows out from the first outlet 142, and then also flows to the primary side 71 of the stator winding package. The first wind L1 and the second wind L2 both cool the primary side 71 of the stator winding package, and enter the air gap between the stator and rotor 8 to flow to the secondary side 72 of the stator winding package. In this process, the cooling wind can effectively dissipate the heat of the rotor 8 that rotates at high speed and generates heat.

[0087] The wind entering the motor from the b air outlet 12 is guided to the secondary side 72 of the stator winding by the guide structure 15 on the other motor bearing 10, and finally mixes with the cooling wind from the primary side 71 and flows out of the motor from the second air outlet 5.

[0088] The solution of the present invention not only optimizes the structural layout of cooling and heat dissipation inside the magnetic levitation high-speed motor, but also uses the design of the air outlet a 11 surrounding the motor axis, and reasonably utilizes the drainage groove 13 on the motor bearing 9 to fully use the cooling air for the stator coil 7 and the internal heat dissipation of the motor bearing 9; at the same time, the air outlet b 12 is set to synchronously strengthen the heat dissipation of the secondary side 72 of the stator coil. Overall, the air outlet a 11 and the air outlet b 12 respectively achieve a uniform heat dissipation effect on the primary side 71 and the secondary side 72 of the stator coil from both sides.

[0089] The present invention further provides an air compressor, which may include any of the above motor bearings 9, or any of the above motors. In particular, because the air compressor uses the above motor bearings 9 or the above motor, the first wind L1 and the second wind L2 diverted by the diversion structure 1a cooperate to effectively dissipate heat from the stator coil 7 and the motor bearing 9.

[0090] The present invention further provides a blower, which may include any of the above motor bearings 9, or any of the above motors. Since the blower uses the above motor bearings 9 or the above motor, the first wind L1 and the second wind L2 diverted by the diversion structure 1a cooperate to effectively dissipate heat from the stator coil 7 and the motor bearing 9.

[0091] 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.

[0092] 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 bearing (9), characterized in that: The motor bearing (9) has a first side (90) in the axial direction for being opposite to the stator coil (7) of the motor, and the motor bearing (9) has a heat dissipation duct (14) inside, and the heat dissipation duct (14) has a first air inlet (141) and a first air outlet (142) located on the first side (90); The motor bearing (9) is provided with a diversion structure (1a), and the diversion structure (1a) is used to divert incoming wind into at least a first wind (L1) and a second wind (L2), and guide the first wind (L1) to the first side (90), so that the first wind (L1) flows out from the first side (90); and the diversion structure (1a) also guides the second wind (L2) to the first air inlet (141) of the heat dissipation air duct, so that the second wind (L2) flows out from the first air outlet (142).

2. The motor bearing (9) according to claim 1, characterized in that: The diversion structure (1a) comprises a diversion groove (13) arranged on the radial outer side wall of the motor bearing (9), and a protrusion (130) is provided in the middle of the bottom surface of the diversion groove (13), and the protrusion (130) divides the diversion groove (13) into a first groove (131) located on one side and a second groove (132) located on the other side. The diversion structure (1a) diverts incoming wind into at least the first wind (L1) and the second wind (L2) through the protrusion (130), and guides the first wind (L1) to the first side (90) through the first groove (131), and guides the second wind (L2) to the first air inlet (141) of the heat dissipation air duct through the second groove (132).

3. The motor bearing (9) according to claim 2, characterized in that: The first groove (131) passes through the first side (90), and the bottom surface (13a) of the first groove extends from the top of the protrusion (130) along the axial direction of the motor bearing (9) toward the first side (90); and the distance between the bottom surface (13a) of the first groove and the axis (m) of the motor bearing decreases as it approaches the first side (90).

4. The motor bearing (9) according to claim 2, characterized in that: The first air inlet (141) is located on the radial outer wall of the motor bearing (9), and the second groove (132) extends to the first air inlet (141); wherein the bottom surface (13b) of the second groove (132) extends from the top of the raised portion (130) to the opening edge (1411) of the first air inlet, and the distance between the second bottom surface and the axis (m) of the motor bearing is smaller as it is closer to the opening edge (1411) of the first air inlet.

5. The motor bearing (9) according to any one of claims 1 to 4, characterized in that: The motor bearing (9) comprises an end cover portion (91) and a bearing seat (92) arranged on one side of the end cover portion (91), and a side of the bearing seat (92) facing away from the end cover portion (91) is the first side (90); There is a gap (9a) between the end cover (91) and the bearing seat (92), and the two are connected by a support column (93); wherein the gap (9a) constitutes a part of the heat dissipation duct (14), and the opening of the gap (9a) on the radial outer side wall of the motor bearing (9) forms a first air inlet (141) of the heat dissipation duct.

6. The motor bearing (9) according to claim 5, characterized in that: The motor bearing (9) has an axial hole (901) penetrating the end cover (91) and the bearing seat (92); wherein: The axial hole (901) constitutes a part of the heat dissipation air duct (14); the first air outlet (142) is arranged on the end surface of the first side (90) and is in communication with the axial hole (901); And / or, the shaft hole (901) on the bearing seat (92) has a groove section (901a), and a heat dissipation hole (143) penetrating the groove section (901a) is provided on one side of the bearing seat (92) close to the end cover portion (91), so that wind in the interval (9a) can flow into the groove section (901a) through the heat dissipation hole (143).

7. A motor, characterized in that: The invention comprises a housing (18) and a motor bearing (9) according to any one of claims 1 to 6; the housing (18) is provided with an air inlet structure and an air outlet structure, the housing (18) draws air into the interior through the air inlet structure, and discharges the air inside through the air outlet structure; The air inlet structure has an air outlet a (11), and the air inlet structure guides the wind toward the interior of the casing (18) through the air outlet a (11); the air outlet a (11) is opposite to the diversion structure (1a) so as to guide the wind toward the diversion structure (1a).

8. The motor according to claim 7, characterized in that: The air inlet structure comprises a first air guide ring (16) sleeved on the outer wall of the housing (18); the first air guide ring (16) is covered on a first area (18a) of the outer wall of the housing (18), and a first annular air inlet cavity (161) is formed between the first air guide ring (16) and the first area (18a); a second a air inlet (1) communicating with the annular air inlet cavity is provided on the first air guide ring (16); the a air outlet (11) is provided on the first area (18a); wherein the number of the a air outlets (11) is more than two, and they are arranged around the axis of the motor; the number of the diversion structures (1a) is equal to the number of the a air outlets (11), and they correspond one to one; Alternatively, the air inlet structure has a second b air inlet (11a), the second b air inlet (11a) is arranged on the side wall of the casing (18), and is the same opening as the a air outlet (11); wherein the number of the second b air inlet (11a) is single.

9. The motor according to claim 7 or 8, characterized in that: It also includes another motor bearing (10), wherein the other motor bearing (10) and the motor bearing (9) are both arranged on opposite sides of the stator coil (7) along the axial direction of the motor; The air inlet structure further comprises an air outlet b (12), and the air inlet structure further guides the air into the interior of the housing (18) through the air outlet b (12); The other motor bearing (10) is provided with a guide structure (15), and the guide structure (15) is opposite to the b air outlet (12) so as to receive wind from the b air outlet (12) and guide the wind to the side of the stator coil (7) away from the motor bearing (9).

10. The motor according to claim 9, characterized in that: The guide structure (15) comprises a guide surface (151) arranged on the radial outer side wall of the other motor bearing (10), so as to receive wind from the air outlet b (12) through the guide surface (151) and guide the wind to the side of the stator coil (7) facing away from the motor bearing (9).

11. The motor according to claim 9, characterized in that: The air inlet structure comprises a second air guide ring (17) sleeved on the outer wall of the casing (18); the second air guide ring (17) is covered on a second area (18b) of the outer wall of the casing (18) and forms a second annular air inlet cavity (171) between the second air guide ring (17) and the second area (18b); the second air guide ring (17) is provided with a third air inlet (4) connected to the annular air inlet cavity; the b air outlet (12) is arranged on the second area (18b); wherein the number of the b air outlets (12) is more than two and they are arranged around the axis of the motor.

12. The motor according to claim 11, characterized in that: The air outlet structure comprises a second air outlet (5) arranged on the second air guide ring (17) so as to discharge the air inside the casing (18) through the second air outlet (5); wherein the second air outlet (5) and the third air inlet (4) are both located on opposite sides of the motor in the radial direction.

13. The motor according to claim 7 or 8, characterized in that: The housing (18) has a chamber (181) on the side of the stator coil (7) facing away from the motor bearing (9), and the air outlet structure includes a second air outlet (5) arranged on the wall of the chamber (181) to discharge the air inside the housing (18) through the second air outlet (5); wherein the number of the second air outlets (5) can be more than two, and they are arranged around the axis of the motor.

14. The motor according to any one of claims 7-8, 10-12, characterized in that: The casing (18) is cylindrical, and a spiral water channel (6) is provided in the wall thickness of the casing (18).

15. An air compressor, characterized in that: A motor bearing (9) comprising any one of claims 1-6, or a motor comprising any one of claims 7-14.

16. A blower, characterized in that: A motor bearing (9) comprising any one of claims 1-6, or a motor comprising any one of claims 7-14.

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