Motor bearing, motor, air compressor and air blower

Abstract

The utility model 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 utility model, 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 utility model belongs to motor heat dissipation technical field, concretely relates to a motor bearing, motor, air compressor and air blower. BACKGROUND

[0002] The magnetic suspension high-speed motor has become the focus of competition in various industries, especially in the field of air compressors and air blowers. The magnetic suspension technology has inherent advantages in oil-free and energy-saving maintenance of equipment, and its development trend in the industry is more and more practical.

[0003] The rotational speed of the magnetic suspension high-speed motor can generally reach more than 35,000 rpm, and the power exceeds 100 kw. The overall power density is high, the internal stator and rotor generate a lot of heat, 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 heating problem. Among them, the stator winding and the motor bearing inside the motor generate a large amount of heat. How to effectively dissipate heat from the two has become a technical problem that needs to be solved in the field. SUMMARY

[0004] Therefore, the utility model provides a motor bearing, motor, air compressor and air blower, and mainly solves the technical problem of how to dissipate heat from the stator winding and the motor bearing inside the motor.

[0005] In order to solve the above problems, the utility model provides a motor bearing, which has a first side for being opposite to a stator winding of a motor in an axial direction, and has a heat dissipation air duct inside, wherein the heat dissipation air duct has a first air inlet and a first air outlet located at the first side.

[0006] The motor bearing is provided with a flow splitting structure, which is used to split the incoming air into at least a first air flow and a second air flow, and guide the first air flow to the first side so that the first air flow flows out from the first side. The flow splitting structure also guides the second air flow to the first air inlet of the heat dissipation air duct, so that the second air flow flows out from the first air outlet.

[0007] In some embodiments, the flow splitting structure includes a flow guide groove provided on the radial outer wall of the motor bearing. The middle part of the bottom surface of the flow guide groove has a protruding part, which divides the flow guide groove into a first groove on one side and a second groove on the other side. The flow splitting structure splits the incoming air into at least a first air flow and a second air flow through the protruding part, and guides the first air flow to the first side through the first groove, and guides the second air flow to the first air inlet of the heat dissipation air duct through the second groove.

[0008] In some embodiments, the first channel extends through the first side, a bottom surface of the first channel extending from a top of the protrusion portion to the first side in an axial direction of the motor bearing; and a distance between the bottom surface of the first channel and the axis of the motor bearing is smaller closer to the first side.

[0009] In some embodiments, the first air inlet is located on a radially outer wall of the motor bearing, the second channel extending to the first air inlet; wherein a bottom surface of the second channel extends from the top of the protrusion portion to an opening edge of the first air inlet, and a distance between the bottom surface of the second channel and the axis of the motor bearing is smaller closer to the opening edge of the first air inlet.

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

[0011] The end cover portion and the bearing seat have a space therebetween and are connected by a support column; wherein the space constitutes a part of the cooling air duct, and an opening of the space on a radially outer wall of the motor bearing forms the first air inlet of the cooling air duct.

[0012] In some embodiments, the motor bearing has a shaft hole extending through the end cover portion and the bearing seat; wherein,

[0013] The shaft hole constitutes a part of the cooling air duct, the first air outlet is arranged on an end surface of the first side and communicates with the shaft hole;

[0014] And / or, the shaft hole on the bearing seat has a groove section, a side of the bearing seat close to the end cover portion is provided with a cooling hole penetrating through the groove section, so that air in the space can flow into the groove section through the cooling hole.

[0015] The utility model also provides a motor which comprises a shell and the motor bearing of any one of the above-mentioned utility models; the shell is provided with an air inlet structure and an air outlet structure, the shell introduces air into the interior through the air inlet structure, and air in the interior is discharged through the air outlet structure;

[0016] The air inlet structure has an a air outlet, the air inlet structure introduces air to the interior of the shell through the a air outlet; the a air outlet is opposite to the flow distribution structure so as to introduce air to the flow distribution structure.

[0017] In some embodiments, the air inlet structure comprises a first air guide ring sleeved on the outer sidewall of the casing, the first air guide ring covers a first region of the outer sidewall of the casing and forms a first annular air inlet cavity with the first region, the first air guide ring is provided with a second air inlet a communicating with the annular air inlet cavity, and the air outlet a is arranged on the first region; wherein the number of the air outlet a is two or more and is arranged around the axis of the motor; the number of the flow distribution structure is equal to and corresponds to the number of the air outlet a.

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

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

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

[0021] The other motor bearing is provided with a guide structure, the guide structure is opposite to the air outlet b to receive air of the air outlet b and guide the air to the side of the stator winding away from the motor bearing.

[0022] In some embodiments, the guide structure comprises a flow guide surface arranged on the radial outer sidewall of the other motor bearing to receive air of the air outlet b and guide the air to the side of the stator winding away from the motor bearing.

[0023] In some embodiments, the air inlet structure comprises a second air guide ring sleeved on the outer sidewall of the casing, the second air guide ring covers a second region of the outer sidewall of the casing and forms a second annular air inlet cavity with the second region, the second air guide ring is provided with a third air inlet communicating with the annular air inlet cavity, and the air outlet b is arranged on the second region; wherein the number of the air outlet b is two or more and is arranged around the axis of the motor.

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

[0025] In some embodiments, the machine housing has a cavity on a side of the stator winding away from the motor bearing, and the air outlet structure comprises a second air outlet provided on a cavity wall of the cavity to discharge air in the machine housing through the second air outlet; wherein the number of the second air outlets can be two or more and arranged around the axis of the motor.

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

[0027] The utility model also provides a kind of air compressor, it includes the motor bearing described in any one of the above, or it includes the motor described in any one of the above.

[0028] The utility model also provides a kind of air blower, it includes the motor bearing described in any one of the above, or it includes the motor described in any one of the above.

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

[0030] 1, since the first side of the motor bearing is opposite to the stator winding of the motor, the first air stream split by the flow splitting structure flows out from the first side and flows to the stator winding, thereby cooling the stator winding; the second air stream split by the flow splitting structure also flows out from the first side through the heat dissipation air duct and flows to the stator winding, thereby cooling the stator winding; and the second air stream also cools the motor bearing when flowing through the heat dissipation air duct. The first air stream and the second air stream split by the flow splitting structure cooperate to effectively cool the stator winding and the motor bearing.

[0031] 2, since the a air outlet and the b air outlet are arranged around the axis of the motor, air can enter along the circumference of the machine housing, forming an annular cooling air outlet design, so that the cooling air flow entering the motor interior is larger and more uniform, thereby improving the heat dissipation effect of the motor interior.

[0032] 3, the flow splitting structure on the motor bearing cooperates with the guide structure on the other motor bearing, and the two guide air to the opposite sides of the stator winding, thereby sufficiently cooling the stator winding and improving the heat dissipation effect of the stator winding.

[0033] 4, compared with the S-shaped water channel in the prior art, the spiral water channel of the utility model can greatly reduce the flow resistance and cover the entire stator area, effectively cooling the stator core. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. The accompanying drawings in the following description are merely exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

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

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

[0037] Figure 3 is Figure 2 is a sectional view along A-A direction in the figure;

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

[0039] Figure 5 is Figure 4 is a sectional view of the motor

[0040] Figure 6 is a structural schematic view of a machine shell provided by an embodiment of the present application;

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

[0042] Figure 8 is a structural schematic view of another motor provided by an embodiment of the present application.

[0043] The reference signs are:

[0044] 1, second a air inlet; 2, waterway inlet; 3, waterway outlet; 4, third air inlet; 5, second air outlet; 6, spiral waterway; 7, stator winding; 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, flow guide groove; 1a, shunt structure; 13a, bottom surface of first channel; 13b, bottom surface of second channel; 14, heat dissipation air duct; 15, guide structure; 16, first air guide ring; 17, second air guide ring; 18, casing; 18a, first area; 18b, second area; 19, flow guide ring; 71, primary side; 72, secondary side; 90, first side; 91, end cover part; 92, bearing seat; 93, support column; 130, protruding part; 131, first channel; 132, second channel; 141, first air inlet; 142, first air outlet; 143, heat dissipation hole; 151, flow guide surface; 161, first annular air inlet cavity; 171, second annular air inlet cavity; 181, cavity; 901, shaft hole; 901a, groove section; 1411, opening edge of first air inlet; m, axis of motor bearing; L1, first air flow; L2, second air flow. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0046] In the description of the utility model, it needs to be understood that the orientation words such as 'front, back, up, down, left, right', 'horizontal, vertical, perpendicular, horizontal' and 'top, bottom' and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation on the protection scope of the utility model; the orientation words 'in, out' refer to the inside and outside relative to the contour of each component.

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

[0048] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0049] See also Figures 1-5 As shown, according to an embodiment of the present invention, a motor bearing 9 is provided. The motor bearing 9 has a first side 90 in the axial direction for facing the stator coil 7 of the motor. The motor bearing 9 has a heat dissipation duct 14 inside. 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 flow diversion structure 1a, such as Figure 3 As shown, the diversion structure 1a is used to divert the incoming airflow into at least a first airflow L1 and a second airflow L2. The diversion structure 1a directs the first airflow L1 to the first side 90, allowing it to flow out from the first side 90. The diversion structure 1a also directs the second airflow L2 to the first air inlet 141 of the heat dissipation duct, allowing it to flow 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 airflow from the first air outlet 142 of the heat dissipation 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 winding 7 of the motor, the first airflow L1 split by the split structure la flows out of the first side 90 and then flows to the stator winding 7 to cool the stator winding 7; and the second airflow L2 split by the split structure la also flows out of the first side 90 via the heat dissipation air duct 14 and then flows to the stator winding 7 to cool the stator winding 7; and the second airflow L2 can also cool the motor bearing 9 when flowing through the heat dissipation air duct 14. The first airflow L1 and the second airflow L2 split by the split structure la cooperate to effectively cool the stator winding 7 and the motor bearing 9.

[0052] To achieve the function of the aforementioned split structure la, in some embodiments, as shown in Figure 3 the aforementioned split structure la can include a flow guide groove 13 arranged on the radially outer side wall of the motor bearing 9, and the middle part of the bottom surface of the flow guide groove 13 has a protruding part 130, which divides the flow guide groove 13 into a first groove 131 on one side and a second groove 132 on the other side. The split structure la splits the incoming air into at least the aforementioned first airflow L1 and the second airflow L2 through the protruding part 130. The split structure la guides the first airflow L1 to the first side 90 through the first groove 131, so that the first airflow L1 flows out of the first side 90. And the split structure la guides the second airflow L2 to the first air inlet 141 of the heat dissipation air duct through the second groove 132, so that the second airflow L2 flows out of the first air outlet 142.

[0053] In the above example, when the incoming air blows to the protruding part 130 in the middle part of the bottom surface of the flow guide groove 13, it can be split by the protruding part 130 and flow along the first groove 131 to the first side 90 of the motor bearing, and along the second groove 132 to the first air inlet 141 of the heat dissipation air duct, thus achieving the function of the aforementioned split structure la. The flow guide groove 13 has the effect of converging the air and splitting the incoming air.

[0054] To make the first groove 131 guide the first airflow L1 to the first side 90, in some embodiments, as shown in Figures 1-3 the aforementioned first groove 131 extends through the first side 90. The bottom surface 13a of the first groove extends from the top of the protruding part 130 to the first side 90 of the motor bearing in the axial direction of the motor bearing 9. And the distance between the bottom surface 13a of the first groove and the axis m of the motor bearing is smaller as it gets 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 is smaller as it gets closer to the first side 90, the bottom surface 13a of the first groove is an inclined surface inclined to the first side 90, which is conducive to the first groove 131 guiding the first airflow L1 to the first side 90 of the motor bearing.

[0056] In order to enable the second channel 132 to guide the second airflow L2 to the first air inlet 141 of the heat dissipation air duct, in some embodiments, as shown in Figure 3 the aforementioned first air inlet 141 is located on the radially outer side wall of the motor bearing 9, and the second channel 132 extends to the first air inlet 141. Among them, the bottom surface 13b of the second channel extends from the top of the protruding part 130 to the opening edge 1411 of the first air inlet, and the distance between the bottom surface of the second channel and the axis m of the motor bearing is smaller 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 channel and the axis m of the motor bearing is smaller closer to the opening edge 1411 of the first air inlet, the bottom surface 13b of the second channel is an inclined surface inclined to the opening edge 1411 of the first air inlet, which is conducive to guiding the second airflow L2 to the first air inlet 141 by the second channel 132.

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

[0059] In the above example, by forming a space 9a between the end cover part 91 and the bearing seat 92, it is conducive to dissipating heat inside the motor bearing 9.

[0060] In some embodiments, as shown in Figure 3 the aforementioned motor bearing 9 has a shaft hole 901 penetrating through the end cover part 91 and the bearing seat 92. The shaft hole 901 constitutes part of the aforementioned heat dissipation air duct 14. The aforementioned first air outlet 142 is arranged on the end face of the first side 90 and communicates with the shaft hole 901, so that the air in the shaft hole 901 can flow out from the first air outlet 142, realizing the effect of the heat dissipation air duct 14 discharging air from the first air outlet 142.

[0061] In some embodiments, as shown in Figure 3As shown, the shaft hole 901 on the aforementioned bearing housing 92 has a groove section 901a, and a heat dissipation hole 143 is provided on the side of the bearing housing 92 near the end cover portion 91, which passes through the groove section 901a, so that the air 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 hole 143 and groove segment 901a, 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, allowing air to enter the motor bearing 9 circumferentially, which is beneficial to improving the heat dissipation of the motor bearing 9.

[0064] like Figures 4-5 As shown, this utility model also provides a motor, which may include a housing 18 and a motor bearing 9 as described above. 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 from the interior through the air outlet structure. The air inlet structure has an air outlet 11 (a), through which the air inlet structure draws air into the interior of the housing 18. The air outlet 11 (a) is opposite to the diversion structure 1a, so as to direct the air to the diversion structure 1a.

[0065] In the above example, air can enter the housing 18 from the air inlet structure, dissipating heat from the stator coil 7, rotor 8, and motor bearing 9 inside the motor, and then be discharged from the air outlet structure. Since the air outlet 11 of the air inlet structure is opposite to the diversion structure 1a, it facilitates directing the airflow to the diversion structure 1a, allowing the diversion structure 1a to distribute the incoming airflow.

[0066] To achieve the function of the aforementioned air intake structure, in the first example, such as Figures 4-5 As shown, the aforementioned air intake structure may include a first air guide ring 16 sleeved on the outer wall of the housing 18. The first air guide ring 16 covers a first region 18a on the outer wall of the housing 18, and a first annular air intake cavity 161 is formed between the first air guide ring 16 and the first region 18a. The first air guide ring 16 is provided with a second air inlet 1 (a) communicating with the annular air intake cavity, and the aforementioned air outlet 11 (a) is provided on the first region 18a. There are two or more air outlets (a) and they are arranged around the axis of the motor. The number of the aforementioned diversion structures 1a is equal to the number of air outlets (a) 11 and they correspond one-to-one.

[0067] In the first example, the air enters the first annular air inlet cavity 161 from the second 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, the air can enter the casing 18 in the circumferential direction, forming an annular cooling air outlet design. This allows the cooling air flow into the motor to be larger and more uniform, thereby improving the heat dissipation effect of the motor.

[0068] In the first example, the number of the second air inlet 1 can be one, which can simplify the air inlet structure and reduce the cost.

[0069] To achieve the function of the air inlet structure, in the second example, as shown in Figure 8 the air inlet structure can have a second b air inlet 11a arranged on the side wall of the casing 18 and the same opening as the a air outlet 11. The number of the second b air inlet 11a can be one.

[0070] In the second example, the air inlet structure can simplify the air inlet structure and reduce the cost by using a single air inlet and outlet.

[0071] In some embodiments, as shown in Figure 5 the motor can further include another motor bearing 10 arranged on the opposite side of the stator winding 7 along the axial direction of the motor. The air inlet structure further has a b air outlet 12 through which the air is introduced into the interior of the casing 18. The other motor bearing 10 is provided with a guide structure 15 opposite the b air outlet 12 to receive the air from the b air outlet 12 and guide the air to the side of the stator winding 7 away from the motor bearing 9.

[0072] In the above examples, the guide structure 15 cooperates with the shunt structure 1a on the motor bearing 9 to guide the air to the opposite sides of the stator winding 7, thereby providing sufficient heat dissipation for the stator winding 7 and improving the heat dissipation effect of the stator winding 7.

[0073] To achieve the function of the guide structure 15, in some embodiments, as shown in Figure 7 the guide structure 15 can include a flow guide surface 151 arranged on the radial outer wall of the other motor bearing 10 to receive the air from the b air outlet 12 and guide the air to the side of the stator winding 7 away from the motor bearing 9.

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

[0075] In some embodiments, as Figure 5 As shown, the aforementioned air inlet structure can further include a second air guide ring 17 sleeved on the outer side wall of the casing 18. The second air guide ring 17 covers the second region 18b of the outer side wall of the casing 18, and a second annular air inlet cavity 171 is formed between the second air guide ring 17 and the second region 18b. The second air guide ring 17 is provided with a third air inlet 4 communicating with the annular air inlet cavity. The aforementioned b air outlets 12 are arranged on the second region 18b. Among them, the number of b air outlets 12 is two or more, and they are arranged around the axis of the motor.

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

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

[0078] In some embodiments, as Figure 5 As shown, the aforementioned air outlet structure can include a second air outlet 5 arranged on the second air guide ring 17 to exhaust air inside the casing 18 through the second air outlet 5. Among them, the second air outlet 5 and the aforementioned third air inlet 4 are located on opposite sides in the radial direction of the motor.

[0079] In the above example, the second air guide ring 17 has a dual function, which can cooperate with the third air inlet 4 to inhale air into the casing 18, and can cooperate with the second air outlet 5 to exhaust air in the casing 18. In this way, the air inlet and outlet structure can be simplified, and the cost can be reduced.

[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 on the side of the stator winding 7 away from the motor bearing 9. The air outlet structure can include a second air outlet 5 arranged on the cavity wall of the chamber 181 to exhaust air inside the casing 18 through the second air outlet 5.

[0081] In the above example, the wind enters the inside of the casing 18 from the air inlet structure, and after cooling the inside of the motor, directly flows out from the second air outlet 5. The number of the second air outlet 5 can be two or more, and is arranged around the axis of the motor.

[0082] In some embodiments, as shown in Figure 5 The aforementioned casing 18 can be cylindrical, and the spiral water channel 6 is arranged in the wall thickness of the casing 18. Compared with the S-shaped water channel in the prior art, the spiral water channel 6 can greatly reduce the flow resistance and cover the entire stator area, effectively cooling the stator core.

[0083] It should be noted that, as shown in Figure 5 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 can be a magnetic suspension high-speed motor. The cooling flow channel of the motor in the prior art is complex and unreasonable. The cooling flow channel in the motor of the present application, such as the spiral water channel 6, the first air guide ring 16 and the second air guide ring 17, is basically designed as a circumferential ring, without specific angle position requirements, which is convenient for design and processing. Through this ring-shaped flow channel design, the cooling medium can be uniformly introduced into the circumferential direction flow channel, which can more evenly cool the inside of the motor and minimize the local high temperature caused by insufficient cooling air volume in the stator and rotor. For the problem of high temperature rise of the stator and rotor, the stator coil 7 is difficult to cool, and the rotor 8 is seriously heated, the present application introduces cooling air to the stator coil 7, fully cools the stator coil 7, and uniformly introduces 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 cooling process of the motor of the present application is as follows:

[0086] The side of the stator winding 7 close to the motor bearing 9 is a first side 71, and the side of the stator winding 7 away from the motor bearing 9 is a second side 72. The air enters the motor interior through the a air outlet 11 and the b air outlet 12 on the motor shell 18. The a air outlet 11 is opposite to the flow splitting structure 1a, and the air of the a air outlet 11 blows to the protruding part 130 in the middle of the bottom surface of the flow guide groove 13, and the air is split into a first air flow L1 and a second air flow L2 by the protruding part 130. The first air flow L1 is guided to the first side 90 through the first groove 131, and then flows to the first side 71 of the stator winding. The second air flow L2 is guided to the heat dissipation air duct 14 inside the motor bearing 9 through the second groove 132, and then flows out from the first air outlet 142, and then flows to the first side 71 of the stator winding. The first air flow L1 and the second air flow L2 both cool the first side 71 of the stator winding, and then flow to the second side 72 of the stator winding through the air gap between the stator and the rotor 8. In the process, the cooling air can effectively cool the high-speed rotating rotor 8.

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

[0088] The utility model discloses a structure layout of the cooling and heat dissipation of the magnetic suspension high-speed motor is optimized. The a air outlet 11 surrounds the motor axis, and the flow guide groove 13 on the motor bearing 9 is reasonably used to fully use the cooling air for the heat dissipation of the stator winding 7 and the motor bearing 9. The b air outlet 12 is arranged to synchronously strengthen the heat dissipation of the second side 72 of the stator winding. Overall, the a air outlet 11 and the b air outlet 12 can uniformly cool the first side 71 and the second side 72 of the stator winding from both sides.

[0089] The utility model also provides a kind of air compressor, which can include the motor bearing 9 of any one of the above or include the motor of any one of the above. Since the air compressor uses the motor bearing 9 or the motor described above, the first air flow L1 and the second air flow L2 split by the flow splitting structure 1a can effectively cool the stator winding 7 and the motor bearing 9.

[0090] The utility model also provides a kind of air blower, which can include the motor bearing 9 of any one of the above or include the motor of any one of the above. Since the air blower uses the motor bearing 9 or the motor described above, the first air flow L1 and the second air flow L2 split by the flow splitting structure 1a can effectively cool the stator winding 7 and the motor bearing 9.

[0091] Those skilled in the art can easily understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0092] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electric machine bearing (9), characterized in that: The motor bearing (9) has a first side (90) opposite to the stator winding (7) of the motor in the axial direction, and has a heat dissipation air duct (14) inside, the heat dissipation air duct (14) has a first air inlet (141) and a first air outlet (142) located at the first side (90); The motor bearing (9) is provided with a flow splitting structure (1a), which is used for splitting the incoming air into at least a first air flow (L1) and a second air flow (L2), and guiding the first air flow (L1) to the first side (90) so that the first air flow (L1) flows out from the first side (90); and the flow splitting structure (1a) also guides the second air flow (L2) to the first air inlet (141) of the heat dissipation air duct, so that the second air flow (L2) flows out from the first air outlet (142).

2. The motor bearing (9) according to claim 1, characterized in that: The flow splitting structure (1a) includes a flow guide groove (13) arranged on the radial outer wall of the motor bearing (9), the middle part of the bottom surface of the flow guide groove (13) has a protruding part (130), the protruding part (130) divides the flow guide groove (13) into a first groove (131) on one side and a second groove (132) on the other side, the flow splitting structure (1a) splits the incoming air into at least the first air flow (L1) and the second air flow (L2) through the protruding part (130), and guides the first air flow (L1) to the first side (90) through the first groove (131), and guides the second air flow (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) penetrates the first side (90), and the bottom surface (13a) of the first groove extends from the top of the protruding part (130) to the first side (90) along the axial direction of the motor bearing (9); 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).

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 extends from the top of the protruding part (130) to the opening edge (1411) of the first air inlet, and the distance between the bottom surface of the second groove 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 1-4, characterized in that: The motor bearing (9) has an end cover part (91) and a bearing seat (92) arranged on one side of the end cover part (91), and the side of the bearing seat (92) away from the end cover part (91) is the first side (90); The end cover part (91) and the bearing seat (92) have a gap (9a) therebetween, and are connected by a support column (93); wherein the gap (9a) constitutes part of the heat dissipation air duct (14), and the opening of the gap (9a) on the radial outer wall of the motor bearing (9) forms the first air inlet (141) of the heat dissipation air duct.

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

7. An electric machine characterized by: The motor bearing (9) of any one of claims 1-6 is included in a casing (18); the casing (18) is provided with an air inlet structure and an air outlet structure, and the casing (18) introduces air into the interior through the air inlet structure and discharges air in the interior through the air outlet structure; Wherein, the air inlet structure has a a air outlet (11), and the air inlet structure introduces air into the interior of the casing (18) through the a air outlet (11); the a air outlet (11) is opposite to the flow distribution structure (1a) to introduce air to the flow distribution structure (1a).

8. The motor of claim 7, wherein: The air inlet structure includes a first air guide ring (16) sleeved on the outer sidewall of the casing (18), the first air guide ring (16) is arranged on a first region (18a) of the outer sidewall of the casing (18) and forms a first annular air inlet cavity (161) with the first region (18a), the first air guide ring (16) is provided with a second a air inlet (1) communicating with the annular air inlet cavity, and the a air outlet (11) is arranged on the first region (18a); wherein, the number of a air outlets (11) is more than two and is arranged around the axis of the motor; the number of flow distribution structures (1a) is equal to and corresponds to the number of a air outlets (11); Or, the air inlet structure has a second b air inlet (11a), and the second b air inlet (11a) is arranged on the sidewall of the casing (18) and is the same opening as the a air outlet (11); wherein, the number of second b air inlets (11a) is single.

9. An electrical machine according to claim 7 or 8, characterised in that: Further comprising another motor bearing (10), both the another motor bearing (10) and the motor bearing (9) are arranged on opposite sides of the stator winding (7) along the axial direction of the motor; The air inlet structure further has b air outlets (12), and the air inlet structure further guides air to the inside of the shell (18) through the b air outlets (12); The another motor bearing (10) is provided with a guide structure (15) opposite to the b air outlets (12) to receive air of the b air outlets (12) and guide the air to the side of the stator winding (7) away from the motor bearing (9).

10. The motor of claim 9, wherein: The guide structure (15) comprises a flow guide surface (151) arranged on the radial outer side wall of the another motor bearing (10) to receive air of the b air outlets (12) through the flow guide surface (151) and guide the air to the side of the stator winding (7) away from the motor bearing (9).

11. The motor of claim 9, wherein: The air inlet structure comprises a second air guide ring (17) sleeved on the outer side wall of the shell (18), the second air guide ring (17) is arranged on a second area (18b) of the outer side wall of the shell (18) and forms a second annular air inlet cavity (171) with the second area (18b), the second air guide ring (17) is provided with a third air inlet (4) communicating with the annular air inlet cavity, and the b air outlets (12) are arranged on the second area (18b); wherein the number of the b air outlets (12) is more than two and surrounds the axis of the motor.

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

13. The motor of claim 7 or 8, wherein: The inside of the shell (18) has a chamber (181) on the side of the stator winding (7) away from the motor bearing (9), and the air outlet structure comprises a second air outlet (5) arranged on the cavity wall of the chamber (181) to discharge air inside the shell (18) through the second air outlet (5); wherein the number of the second air outlet (5) can be more than two and surrounds the axis of the motor.

14. The motor of any one of claims 7-8, 10-12, wherein: The shell (18) is cylindrical, and a spiral water channel (6) is arranged in the wall thickness of the shell (18).

15. An air compressor, characterized by: The motor bearing (9) of any one of claims 1-6, or the motor of any one of claims 7-14.

16. A blower characterized by: The electric machine bearing (9) according to any one of claims 1 to 6, or the electric machine according to any one of claims 7 to 14.

Images