CN112039262B - Motor and air suspension centrifugal fan applying same - Google Patents
Motor and air suspension centrifugal fan applying same Download PDFInfo
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- CN112039262B CN112039262B CN202010774851.7A CN202010774851A CN112039262B CN 112039262 B CN112039262 B CN 112039262B CN 202010774851 A CN202010774851 A CN 202010774851A CN 112039262 B CN112039262 B CN 112039262B
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- 239000000725 suspension Substances 0.000 title description 13
- 238000004804 winding Methods 0.000 claims abstract description 27
- 230000017525 heat dissipation Effects 0.000 claims description 51
- 239000007779 soft material Substances 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 239000007788 liquid Substances 0.000 description 7
- 238000004891 communication Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a motor, which comprises a front end cover, a rear end cover, a motor shell, a stator assembly and a rotor, wherein the front end cover and the rear end cover are respectively arranged on the two side end surfaces of the motor shell; permanent magnets distributed annularly are arranged at the part of the rotor opposite to the stator winding; the two sides of the rotor are respectively provided with a front thrust bearing and a rear thrust bearing, the front thrust bearing and the rear thrust bearing are positioned in the motor shell, the end surfaces of the front end cover and the rear end cover are provided with air bearings, and the two ends of the rotor respectively penetrate through the air bearings; an air film gap is reserved between the air bearing and the rotor. The thrust bearings are arranged on the two sides of the rotor, thrust forces are applied from the front side and the rear side of the rotor, the rotor is prevented from moving forwards and backwards, the rotor can be always centered, and the transmission effect is stable.
Description
Technical Field
The invention relates to the technical field of fans, in particular to a motor and an air suspension centrifugal fan applying the motor.
Background
The air suspension centrifugal fan is a centrifugal fan which depends on air to suspend a motor rotor so as to eliminate friction.
Specifically, the rotor of the motor is assembled on two air bearings, the outer diameter of the rotor is smaller than the inner diameter of the air bearings, and an air film gap is reserved between the rotor and the air bearings. Before the start of the operation, the rotor naturally falls on the air bearing; after the air bearing is started to work, the rotor starts to rotate to drive surrounding air to rotate along with the rotation of the rotor, the surrounding air flows around the rotor when the speed of the rotor reaches a certain value, the surrounding air flow rate is high enough, the pressure is high enough, and when the air flows between the rotor and the air bearing, a supporting force is provided for the rotor, so that the rotor can be separated from the contact with the air bearing and rotate while being suspended.
When the rotating speed of the rotor is within a certain range, the rotor can always suspend.
However, in the motor of the air suspension centrifugal fan, the rotor tends to move back and forth along the axial direction of the rotor when rotating, and in the existing motor, the limitation on the back and forth movement of the rotor is lacking or insufficient, for example, in the air suspension air supply adjustable high-speed motor direct drive blower disclosed in CN102200136B, the thrust bearing is only arranged on one side of the rotor, and the movement tendency of the rotor in two directions is difficult to be limited, so that the motor rotor of the existing air suspension centrifugal fan is easy to move back and forth.
Disclosure of Invention
The invention aims to provide a motor to solve the problem that a motor rotor of the existing air suspension centrifugal fan is easy to move back and forth in the background technology.
In order to achieve the above object, a first aspect of the present invention provides a motor, including a front end cover, a rear end cover, a motor housing, a stator assembly, and a rotor, where the front end cover and the rear end cover are respectively disposed on two side end faces of the motor housing, the stator assembly is mounted on an inner surface of the motor housing, the stator assembly includes an annular stator winding, and the rotor passes through an area surrounded by the stator winding; permanent magnets distributed in a ring shape are arranged at the part of the rotor opposite to the stator winding; a front thrust bearing and a rear thrust bearing are respectively arranged on two sides of the rotor, the front thrust bearing and the rear thrust bearing are positioned in the motor shell, air bearings are arranged on the end surfaces of the front end cover and the rear end cover, and two ends of the rotor respectively penetrate through the air bearings; an air film gap is reserved between the air bearing and the rotor.
Advantageously or exemplarily, the position of the rotor corresponding to the air bearing is provided with an intermediate assembly, the intermediate assembly comprises a plurality of blades with the same thickness as that of the air bearing, and the plurality of blades are annularly distributed on the part of the rotor corresponding to the air bearing; the outer edge of the blade forms an arc-shaped surface matched with the inner side surface of the air bearing; the air film gap is reserved between the blade and the air bearing; the left side surface and the right side surface of each blade form an arc-shaped surface which is complementary with the side surface of the adjacent blade, and an airflow channel is formed between the side surfaces of the two blades.
Beneficially or exemplarily, the vanes are movably connected with sliding balls corresponding to the outer edges of the air bearings, the lower vanes contact the inner side surfaces of the air bearings through the sliding balls, and the upper vanes are separated from the inner side surfaces of the air bearings.
Advantageously or exemplarily, the sliding ball is capable of contacting and rotating along its rotation path under the action of an air bearing when the rotor rotates; a T-shaped groove is formed in the outer surface of the sliding ball along the rotating path of the sliding ball; the outer edge of the blade is provided with a spherical groove, the wall of the spherical groove is provided with a T-shaped block matched with the T-shaped groove, and the T-shaped block is embedded into the T-shaped groove.
Advantageously or exemplarily, a plurality of sliding balls are arranged on the same blade, and/or a plurality of T-shaped blocks are arranged along the axial direction of the rotor.
Advantageously or exemplarily, the air bearing comprises an inner ring and an outer ring, the outer ring is arranged outside the inner ring, a spring layer is arranged between the inner ring and the outer ring, and the inner ring is made of soft material.
Advantageously or exemplarily, the stator assembly further comprises an inner casing, the stator winding is provided with two or more stator windings, and the two or more stator windings are mounted on the inner casing and arranged along the axial direction of the rotor.
Advantageously or exemplarily, the inner casing comprises a cylindrical inner casing body and heat dissipation ribs distributed annularly along an outer wall of the inner casing body, the heat dissipation ribs being connected to an inner surface of the outer casing of the electric machine, the stator winding being mounted on the inner casing body.
Advantageously or exemplarily, the heat dissipation ribs form heat dissipation channels therebetween, two adjacent heat dissipation channels form heat dissipation circuits, in one heat dissipation circuit, one side of one heat dissipation channel is connected with an inlet, the same side of the other heat dissipation channel is connected with an outlet, and the other sides of the two heat dissipation channels are communicated.
A second aspect of the present invention provides an air suspension centrifugal fan, including the motor provided in the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the thrust bearings are arranged on the two sides of the rotor, thrust forces are applied from the front side and the rear side of the rotor, the rotor is prevented from moving forwards and backwards, the rotor can be always centered, and the transmission effect is stable.
Drawings
Fig. 1 is a structural view of an air suspension centrifugal fan according to the present invention.
Fig. 2 is a schematic connection diagram of a motor and a compressor of an air suspension centrifugal fan according to the present invention.
Fig. 3 is a cross-sectional view of an electric machine of the present invention.
Fig. 4 is a cross-sectional view of a return duct of an electric machine of the invention.
Fig. 5 is a sectional view taken along a line a-a in fig. 3 of an electric machine according to the present invention.
Fig. 6 is a sectional view of a motor of the present invention taken along the line B-B in fig. 3.
Fig. 7 is an enlarged view of a motor of the present invention at C in fig. 6.
Fig. 8 is an enlarged view at D in fig. 3 of a motor of the present invention.
In the figure:
1-a motor housing;
2-a stator assembly; 21-a stator winding; 22-an inner shell; 221-an inner shell body; 222-heat dissipating ribs; 223-heat dissipation channels;
3-a rotor; 31-a front thrust bearing; 32-rear thrust bearing;
33-air bearings; 331-inner ring; 332-outer ring; 333-spring layer;
34-an intermediate component;
341-blades; 3411-spherical groove; 3412-T type blocks;
342-an airflow channel;
343-a ball; 3431-T shaped groove;
4-front end cover;
5-rear end cap;
6-a transmission wheel;
7-a water pump; 71-a rotation axis; 72-an outlet channel; 73-a first intermediate chamber; 74-a bypass conduit; 75-a return line; 76-a water reservoir;
8, a motor; 9-a compressor; 91-air outlet; 92-air inlet; 10-a housing; 101-an electric cabinet; 102-screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 8, in a first aspect, an embodiment of the present invention provides a motor, including a front end cover 4, a rear end cover 5, a motor housing 1, a stator assembly 2, and a rotor 3, where the front end cover 4 and the rear end cover 5 are respectively disposed on two side end faces of the motor housing 1, and the stator assembly 2 is disposed on an inner surface of the motor housing 1, the stator assembly 2 includes a ring-shaped stator winding 21, and the rotor 3 passes through an area surrounded by the stator winding 21; permanent magnets distributed in a ring shape are arranged at the part of the rotor 3 opposite to the stator winding 21; a front thrust bearing 31 and a rear thrust bearing 32 are respectively arranged on two sides of the rotor 3, the front thrust bearing 31 and the rear thrust bearing 32 are positioned in the motor shell 1, air bearings 33 are arranged on the end surfaces of the front end cover 4 and the rear end cover 5, and two ends of the rotor 3 respectively penetrate through the air bearings 33; an air film gap is left between the air bearing 33 and the rotor 3.
When the motor is used, the stator assembly 2 of the motor drives the rotor 3 to rotate, and when the rotor 3 rotates, air is driven to rotate at the air bearing 33, so that the air has enough pressure to support the rotor 3 to suspend.
Meanwhile, at the front thrust bearing 31 and the rear thrust bearing 32, the rotors are respectively subjected to thrust toward the middle of the rotor 3.
Wherein, motor, fan isotructure set up in casing 10, and the export of fan is connected to casing 10 surface, and the external pipeline that has carries wind to practical application occasion. The motor adopts efficient permanent magnet motor, and the fan adopts centrifugal fan, and fan or motor speed information are gathered by the speedtransmitter of connecting in the electric cabinet 103 etc to transmit to the control module in the electric cabinet 103, with the motor speed of regulation and control according to the user demand, and then adjust the fan amount of wind.
This embodiment all is provided with footstep bearings in the both sides of rotor 3, applys thrust from rotor 3's front and back both sides, prevents the rotor back-and-forth movement to make the rotor can remain the centering all the time, the transmission effect is stable.
In one embodiment, the front and rear thrust bearings 31, 32 may be dynamic or static thrust bearings.
In one embodiment, an intermediate assembly 34 is disposed at a position of the rotor 3 corresponding to the air bearing 33, the intermediate assembly 34 includes a plurality of blades 341 having a thickness equal to that of the air bearing 33, and the plurality of blades 341 are annularly distributed on a portion of the rotor 3 corresponding to the air bearing 33; the outer edge of the vane 341 forms an arc surface matched with the inner side surface of the air bearing 33; the air film gap is left between the blade 341 and the air bearing 33; the left and right side surfaces of the vane 341 form arc-shaped surfaces complementary to the side surfaces of the adjacent vane 341, and a flow channel 342 is formed between the side surfaces of the two vanes 341.
During the rotation of the rotor 3, the blades 341 of the intermediate assembly 34 rotate with the rotor 3 to suck the surrounding air, and then the air flows to the outer edge of the blades 341 through the arc-shaped side surfaces of the blades 341, i.e., the air flow channels 342, and a high-pressure air film is formed in the air film gap between the outer edge and the air bearing to support the rotor 3. Since the blades 341 are arc-shaped, the air flowing through the air flow channel 342 can be pressurized and accelerated, the air reaching the outer edge of the blades 341 has a certain pressure and speed, and the air pressure at the outer edge of the blades 341 is increased under the accelerated rotation of the blades 341, so as to support the rotor 3.
In this embodiment, the rotation of the blade 341 does work on the air, so that the pressure and speed can be increased more quickly, the time for the air in the air film gap to reach the pressure capable of supporting the rotor 3 is shortened, and when the rotor 3 is supported by the air film, better supporting force can be provided, and the support is stable.
In one embodiment, a sliding ball 343 is movably connected to the blade 341 corresponding to the outer edge of the air bearing 33, the lower blade 341 contacts the inner surface of the air bearing 33 through the sliding ball 343, and the upper blade 341 is separated from the inner surface of the air bearing 33.
In the conventional air bearing, the rotor 3 is often placed directly on the air bearing in an initial state, the rotor 3 is always in contact with the inner side surface of the air bearing 33 when the air film pressure is not enough to support the rotor 3, and sliding friction exists between the rotor 3 and the air bearing 33 when the rotor 3 starts to rotate.
In the present embodiment, the sliding ball 343 is provided to convert sliding friction between the rotor 3 and the inner surface of the air bearing 33 at the beginning into rolling friction, thereby reducing the frictional force between the rotor 3 and the air bearing 33 and reducing energy loss. When the air film is enough to support the rotor 3, the sliding ball 343 is separated from the inner side of the air bearing 33 and suspended to rotate with the rotor 3.
In one embodiment, the sliding ball 343 is capable of contacting and rotating along its rotational path R1 under the action of the air bearing 33 when the rotor 3 rotates; the outer surface of the sliding ball 343 is provided with a T-shaped groove 3431 along the rotating path R1; a spherical groove 3411 is formed in the outer edge of the blade 341, a T-shaped block 3412 matched with the T-shaped groove 3431 is formed in the wall of the spherical groove 3411, and the T-shaped block 3412 is embedded in the T-shaped groove 3431.
In the present embodiment, a structure is provided in which the slide ball 343 is fixed to the rotor 3. At the beginning of the rotation of the rotor 3, the T-shaped groove 3431 is provided to connect the sliding ball 343 in the spherical groove 3411, and the T-shaped groove 3431 on the sliding ball 343 slides in the T-shaped block 3412 of the spherical groove 3411.
In another embodiment, the sliding ball 343 may not be provided on the blade 341 but provided on the inner surface of the air bearing 22, and a T-shaped block is provided on the inner surface of the air bearing 22.
In a further embodiment, the edge of the sliding ball 343 is flush with its corresponding end face.
Furthermore, in other embodiments, to secure slide ball 343, spherical groove 3411 may also be configured to: more than half of slide ball 343 is wrapped and the groove wall of spherical groove 3411 is fitted with slide ball 343, and the clearance between the groove wall and slide ball 343 is maintained at a size that does not allow slide ball 343 to fall off spherical groove 3411.
In other embodiments, although the fixation of the sliding ball 343 can be achieved as well, there is a strict requirement for the gap between the groove wall and the sliding ball 343, which cannot be too large, otherwise the sliding ball 343 will shake therein, affecting the rotation of the rotor 3. Compared with other embodiments, the arrangement of the T-shaped groove 3431 and the T-shaped block 3412 can guide the rotation of the sliding ball 343, the track of the sliding ball 343 is stable, the sliding ball is not shaken, and the influence on the rotation of the rotor 3 is small.
In one embodiment, to stabilize the rotation of the blade 34 at the beginning, a plurality of sliding balls 343 are provided on the same blade 341, and/or a plurality of T-shaped blocks 3412 are provided along the axial direction of the blade 34.
In one embodiment, the air bearing 33 includes an inner ring 331 and an outer ring 332, the outer ring 332 is disposed outside the inner ring 331, and a spring layer 333 is disposed between the inner ring 331 and the outer ring 332, wherein the inner ring 331 is made of a soft material.
When the rotor 3 starts to rotate, friction occurs between the rotor 3 and the inner surface of the air bearing 22, and the spring layer 333 and the inner ring 331 made of a soft material are provided, whereby the influence of the friction on the air bearing 22 can be reduced.
In one embodiment, the stator assembly 2 further includes an inner casing 22, and the stator windings 21 are provided with two or more, and the two or more stator windings 21 are mounted on the inner casing 22 and arranged along the axial direction of the rotor 3.
In the present embodiment, a plurality of stator windings 21 are provided, and the plurality of stator windings 21 drive the rotor 3 to rotate together, thereby increasing the output of the rotor 3.
In one embodiment, the inner casing 22 includes a cylindrical inner casing body 221 and heat dissipation ribs 222 annularly distributed along an outer wall of the inner casing body 221, the heat dissipation ribs 222 are connected to an inner surface of the motor outer casing 1, and the stator winding 21 is mounted on the inner casing body 221.
When the stator winding 21 drives the rotor 3 to rotate, a current flows inside, and the current generates a rotating magnetic field which is converted, and simultaneously generates a large amount of heat, which affects the working state of the motor if the heat is not dissipated. In the present embodiment, the heat dissipation ribs 222 are provided on the outside of the inner case body 221 for mounting the stator winding 21, and the heat generated by the stator winding 21 is conducted to the heat dissipation ribs 222.
In one embodiment, the heat dissipation ribs 222 form heat dissipation channels 223 therebetween, and two adjacent heat dissipation channels 223 form heat dissipation circuits, in one heat dissipation circuit, one side of one heat dissipation channel 223 is connected with an inlet, the same side of the other heat dissipation channel 223 is connected with an outlet, and the other sides of the two heat dissipation channels 223 are communicated.
During heat dissipation, in a heat dissipation loop, low-temperature liquid is injected from an inlet on one side of one heat dissipation channel 223, and after entering from the inlet, the low-temperature liquid flows through the heat dissipation channel 223, flows out from the other side communicated with the other heat dissipation channel 223, enters the other heat dissipation channel 223 through the communication channel, flows through the other heat dissipation channel 223, and flows out from an outlet of the other heat dissipation channel 223, so that a heat dissipation cycle is completed.
The heat dissipation manner of the present embodiment facilitates input and output of the low-temperature liquid, and the low-temperature liquid can effectively dissipate heat of the heat dissipation ribs 222.
In a further embodiment, the heat dissipation channels 223 extend from one end cap to the other end cap, with the inlet and outlet provided in one of the end caps and the other end cap provided with a communication channel therein to communicate the two heat dissipation channels 223 in the same heat dissipation circuit.
Preferably, the low-temperature liquid is water, and the temperature of the low-temperature liquid is controlled to effectively dissipate heat of the heat dissipation ribs 222. Alternatively, the cryogenic liquid is cryogenic air.
In a preferred embodiment, further, the inlet and the outlet are arranged in a front end cover 4, a communication channel is arranged in a rear end cover 5, a part of the rotor 3 extending from the rear end cover 5 is connected with a rotating shaft of a fan, a part of the rotor 3 extending from the front end cover 4 is connected with one end of a driving wheel 6, the other end of the driving wheel 6 is connected with a rotating shaft 71 of a water pump 7, a part of the rotor 3 extending from the front end cover 4 is driven to the rotating shaft 71 of the water pump 7, the water pump 7 is provided with an outlet channel 72 and an inlet channel connected with a water reservoir 76, the outlet channel 72 is connected to a first middle cavity 73, the first middle cavity 73 is provided with a plurality of branch pipelines 74, and the plurality of branch pipelines 74 are respectively communicated with inlets of different heat dissipation loops; the outlet of the heat dissipation circuit is connected to a return line 75, the return line 75 being connected to a water reservoir 76.
During water-cooling heat dissipation, the rotor 3 rotates to drive the driving wheel 6 to rotate, and further drive the rotating shaft 71 to rotate, so that the water pump 7 is driven to pump water in the water reservoir 76 to the outlet channel 72, the water flows to the first intermediate cavity 73 through the outlet channel 72, the water is divided into a plurality of branches at the first intermediate cavity 73 and flows to inlets of different heat dissipation loops, after the circulation back and forth in the heat dissipation loops is completed, the water flows to the backflow channel 75 through the outlet and flows back to the water reservoir 76, when the water absorbing heat flows back to the water reservoir 76, the water exchanges heat with the water in the water reservoir 76, and the temperature is reduced.
In the event that the water quantity is sufficiently cooled, the water in the reservoir 76 is always maintained at a temperature that enables cooling of the stator windings 21.
In a further embodiment, a second intermediate chamber 77 is provided between the return conduit 75 and the outlet of the heat dissipation circuit for returning the collected water to the reservoir 76 through the return conduit 75.
The second aspect of the embodiment of the present invention provides an air suspension centrifugal fan, which uses the motor provided in the first aspect to drive an impeller of a compressor to rotate, so as to compress and convey air.
Centrifugal fan includes compressor, air outlet, filtration and inlet scoop etc, and the impeller of compressor is connected to the rotor 3 of motor, and the impeller is followed the inlet scoop and is breathed in, and gaseous process filtration gets into the compressor behind the structure, is done work by the impeller, and pressure, speed change back, flow from the air outlet, provide the amount of wind that pressure, speed accord with the demand.
In fig. 1, a part of the casing 10 is omitted to show the internal structure of the air suspension centrifugal fan.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. A motor comprises a front end cover (4), a rear end cover (5), a motor shell (1), a stator assembly (2) and a rotor (3), wherein the front end cover (4) and the rear end cover (5) are respectively arranged on two side end faces of the motor shell (1), and the motor is characterized in that the stator assembly (2) is arranged on the inner surface of the motor shell (1), the stator assembly (2) comprises an annular stator winding (21), and the rotor (3) penetrates through an area defined by the stator winding (21);
permanent magnets distributed in a ring shape are arranged at the part of the rotor (3) opposite to the stator winding (21);
a front thrust bearing (31) and a rear thrust bearing (32) are respectively arranged on two sides of the rotor (3), the front thrust bearing (31) and the rear thrust bearing (32) are positioned in the motor shell (1), air bearings (33) are arranged on the end faces of the front end cover (4) and the rear end cover (5), and two ends of the rotor (3) respectively penetrate through the air bearings (33);
an air film gap is reserved between the air bearing (33) and the rotor (3);
an intermediate assembly (34) is arranged at the position, corresponding to the air bearing (33), of the rotor (3), wherein the intermediate assembly (34) comprises a plurality of blades (341) with the thickness being the same as that of the air bearing (33), and the plurality of blades (341) are annularly distributed on the part, corresponding to the air bearing (33), of the rotor (3);
the outer edge of the vane (341) forms an arc-shaped surface matched with the inner side surface of the air bearing (33); the air film gap is reserved between the blade (341) and the air bearing (33);
the left side surface and the right side surface of each blade (341) form arc-shaped surfaces which are complementary with the side surfaces of the adjacent blades (341), and a gas flow channel (342) is formed between the side surfaces of the two blades (341);
the outer edge of the blade (341) corresponding to the air bearing (33) is movably connected with a sliding ball (343), the lower blade (341) contacts the inner side surface of the air bearing (33) through the sliding ball (343), and the upper blade (341) is separated from the inner side surface of the air bearing (33);
the sliding ball (343) is capable of contacting and rotating along its rotation path (R1) under the action of an air bearing (33) when the rotor (3) rotates; the outer surface of the sliding ball (343) is provided with a T-shaped groove (3431) along the rotating path (R1); a spherical groove (3411) is formed in the outer edge of the blade (341), a T-shaped block (3412) matched with the T-shaped groove (3431) is arranged on the wall of the spherical groove (3411), and the T-shaped block (3412) is embedded into the T-shaped groove (3431);
a plurality of sliding balls (343) are arranged on the same blade (341), and/or a plurality of T-shaped blocks (3412) are arranged along the axial direction of the rotor (3).
2. An electric machine according to claim 1, characterized in that the air bearing (33) comprises an inner ring (331) and an outer ring (332), the outer ring (332) being arranged outside the inner ring (331), a spring layer (333) being arranged between the inner ring (331) and the outer ring (332), wherein the inner ring (331) is made of a soft material.
3. An electric machine according to claim 1, characterized in that the stator assembly (2) further comprises an inner casing (22), that the stator windings (21) are provided in two or more, and that the two or more stator windings (21) are mounted on the inner casing (22) in the axial direction of the rotor (3).
4. An electric machine according to claim 3, characterized in that the inner housing (22) comprises a cylindrical inner housing body (221) and heat dissipating ribs (222) distributed annularly along the outer wall of the inner housing body (221), the heat dissipating ribs (222) being connected to the inner surface of the outer motor housing (1), the stator windings (21) being mounted on the inner housing body (221).
5. An electric machine according to claim 4, characterized in that the heat dissipation ribs (222) form heat dissipation channels (223) therebetween, two adjacent heat dissipation channels (223) forming a heat dissipation circuit,
in a heat dissipation loop, one side of one heat dissipation channel (223) is connected with an inlet, the same side of the other heat dissipation channel (223) is connected with an outlet, and the other sides of the two heat dissipation channels (223) are communicated.
6. An air-suspending centrifugal fan comprising the motor of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774851.7A CN112039262B (en) | 2020-08-04 | 2020-08-04 | Motor and air suspension centrifugal fan applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774851.7A CN112039262B (en) | 2020-08-04 | 2020-08-04 | Motor and air suspension centrifugal fan applying same |
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| Publication Number | Publication Date |
|---|---|
| CN112039262A CN112039262A (en) | 2020-12-04 |
| CN112039262B true CN112039262B (en) | 2021-08-10 |
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| CN202010774851.7A Active CN112039262B (en) | 2020-08-04 | 2020-08-04 | Motor and air suspension centrifugal fan applying same |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6302736B2 (en) * | 2014-04-28 | 2018-03-28 | 日立オートモティブシステムズ株式会社 | Rotating electric machine |
| CN105703520B (en) * | 2014-11-24 | 2018-11-20 | 雷虹桥 | Magnetic suspension bearing high-speed motor with air bearing auxiliary |
| CN207568661U (en) * | 2017-08-17 | 2018-07-03 | 上海大学 | Vertical two-stage permanent magnetism gas suspension ORC cogeneration machines |
| CN107332389B (en) * | 2017-08-24 | 2021-09-14 | 莱克电气股份有限公司 | Blower motor and blower |
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Denomination of invention: A motor and an air suspension centrifugal fan using the motor Effective date of registration: 20221206 Granted publication date: 20210810 Pledgee: Dongguan branch of Bank of Dongguan Co.,Ltd. Pledgor: Leitz intelligent equipment (Guangdong) Co.,Ltd. Registration number: Y2022980025319 |
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Denomination of invention: A motor and an air suspension centrifugal fan using the motor Granted publication date: 20210810 Pledgee: Dongguan branch of Bank of Dongguan Co.,Ltd. Pledgor: Leitz intelligent equipment (Guangdong) Co.,Ltd. Registration number: Y2024980036339 |
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