An air suspension centrifugal blower with a double-headed efficient self-cooling separated ventilation structure

Abstract

The present invention discloses an air suspension centrifugal blower with a double-headed, high-efficiency, self-cooling, and separated ventilation structure, comprising a base, a power unit, two impeller units, two magnetic bearing assemblies, and a heat dissipation system. The air suspension centrifugal blower of the present invention uses two magnetic bearing assemblies to adjust the position of the rotor. When the rotor is axially offset during its suspended rotation, the axial position of the rotor is adjusted by the first magnetic bearing adjustment unit. When the rotor is longitudinally offset during its suspended rotation, the longitudinal position of the rotor is adjusted by the second magnetic bearing adjustment unit. The two magnetic bearing assemblies prevent the rotor from colliding with the inner wall of the shell, reducing friction and thereby increasing the service life of the rotor. A water-cooled heat dissipation system is installed in the first and second shells, so that the blower has good heat dissipation performance and prevents the rotor from overheating during high-speed rotation.

Description

Technical Field

[0001] The invention relates to a blower, in particular to an air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure. Background Art

[0002] The power unit of the blower is driven by a conventional motor or a motor with a magnetic bearing structure. The present invention is an improvement made to the magnetic bearing.

[0003] The bearings in a magnetic levitation motor primarily consist of magnetic bearings and auxiliary bearings. During operation, the magnetic bearings support the rotor as it rotates. Under the combined force of electromagnetic force and gravity, the rotor rotates around its axis and oscillates back and forth in the radial direction. The auxiliary bearings support the rotor when it is stationary.

[0004] If an unexpected event occurs during operation of a magnetic levitation motor, such as a sudden power failure in the magnetic bearings, the rotor can suddenly drop while rotating at high speeds (over 30,000 rpm). Because the gap between the auxiliary bearing and the rotor is smaller than the gap between the magnetic bearings and the rotor, the auxiliary bearing is instantly subjected to a significant impact force when the rotor drops, rotating at high speed along with the rotor. This can cause the auxiliary bearing to sinter and crack at high temperatures.

[0005] In addition, when the magnetic levitation motor is running, if it is impacted by the load or the magnetic bearing controller is unstable, the rotor will become unstable and vibrate back and forth away from the center axis, which will easily collide with the inner wall of the shell. If the rotor collides too many times, it will easily cause the rotor to bend and deform, and eventually make the magnetic levitation motor unusable. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an air-suspended centrifugal blower with a double-headed, high-efficiency, self-cooling, and separated ventilation structure. The purpose of designing the air-suspended centrifugal blower is to avoid damage caused by rotor eccentricity.

[0007] To solve the above technical problems, the present invention is implemented through the following solutions: An air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure of the present invention includes a base and also includes:

[0008] A power unit is mounted on the base and includes a first housing, a stator mounted within the first housing, and a rotor capable of being driven by the stator to rotate. Two integrally formed discs are sleeved and fixed on the main shaft of the rotor. The openings of the discs extend toward a side perpendicular to the disc surface to form a sleeve fixed to the main shaft.

[0009] Two sets of impeller parts, the two sets of impeller parts are installed on the machine base, and the impellers thereon are respectively installed at both ends of the main shaft of the rotor;

[0010] Two groups of magnetic bearing assemblies, the two groups of magnetic bearing assemblies are installed on the machine base and the two groups of magnetic bearing assemblies are respectively installed between the power unit and the two groups of impeller units, the magnetic bearing assemblies include a second outer shell, an inner shell installed in the second outer shell, a position sensor installed in the inner shell and used to sense whether the disk is offset, a first magnetic bearing adjustment unit for adjusting the X-axial position of the disk according to an X-axis offset signal generated by the position sensor sensing the position of the disk, and a second magnetic bearing adjustment unit for adjusting the longitudinal position of the disk according to a longitudinal offset signal generated by the position sensor sensing the position of the main shaft;

[0011] The air suspension centrifugal blower further comprises a heat dissipation system, which is distributed on the first housing of the power unit and the second housings of the two sets of magnetic suspension bearing assemblies.

[0012] Furthermore, the heat dissipation system is a water-cooled heat dissipation system.

[0013] Furthermore, the first shell has a through cavity passing through both ends, and the annular surfaces at both ends are provided with a plurality of channels passing through the annular surfaces and distributed in a ring array, and the channels are used to install water cooling pipes of the water cooling heat dissipation system.

[0014] Furthermore, the stator includes a stator core and a stator coil wound around the stator core, and the stator core is fixed in the first shell.

[0015] Furthermore, the position sensing portion is fixed in a first annular groove of an opening of the shaft hole at one end of the inner shell, and comprises a ring body, a plurality of first position sensors mounted on an annular surface of the ring body and distributed in an annular array, and a plurality of second position sensors mounted on an inner ring of the ring body and distributed in an annular array;

[0016] The first annular groove is provided with a plurality of annular array through holes, and the first position sensor passes through the through holes, with its sensing direction facing the disk body;

[0017] Wherein, the sensing direction of the second position sensor is toward the main shaft.

[0018] Furthermore, the inner shell has an axial hole passing through both ends and is provided with adjacent first and second annular cavities. The first magnetic bearing adjustment part is installed in the first annular cavity, and the second magnetic bearing adjustment part is installed in the second annular cavity.

[0019] Furthermore, the disc is arranged in the inner shell, the disc body is located in the first annular cavity, the sleeve extends to the second annular cavity, and a magnetic ring is sleeved and fixed on the sleeve located in the second annular cavity;

[0020] The first magnetic bearing adjustment portion includes a first frame and a first electromagnetic coil wound within the first frame. An adjustment gap is left between the inner ring of the first frame and the disc and the sleeve. The winding direction of the first electromagnetic coil satisfies: the magnetic field generated by the first electromagnetic coil can drive the disc to move radially along the main shaft.

[0021] The second magnetic bearing adjustment part includes a second skeleton and multiple groups of second electromagnetic coils wound on the second skeleton. An adjustment gap is left between the second skeleton and the magnetic ring. The multiple groups of second electromagnetic coil ring arrays are distributed on the second skeleton. The direction of the magnetic field generated by them can drive the magnetic ring to drive the disk and the main shaft to move in the longitudinal plane.

[0022] Furthermore, the first skeleton is provided with a third annular cavity concentric with the first annular cavity, and the first electromagnetic coil is wound along the circumferential direction of the third annular cavity.

[0023] Furthermore, bone positions for winding the second electromagnetic coil are distributed in a ring array between the outer ring and the inner ring of the second skeleton, and each bone position points to the center of the second skeleton and the center of the second annular cavity, and a group of second electromagnetic coils are wound on each bone position.

[0024] Furthermore, the impeller portion comprises a worm gear casing and an impeller installed in the worm gear casing, and the air duct outlet of the worm gear casing faces upward.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the air-suspended centrifugal blower of the present invention adopts two sets of magnetic bearing assemblies to adjust the position of the rotor. When the rotor is axially offset during its suspended rotation, the axial position of the rotor is adjusted by the first magnetic bearing adjustment part. When the rotor is longitudinally offset during its suspended rotation, the longitudinal position of the rotor is adjusted by the second magnetic bearing adjustment part. The two sets of magnetic bearing assemblies can prevent the rotor from colliding with the inner wall of the shell, reduce friction, and thereby improve the service life of the rotor.

[0026] A water-cooling heat dissipation system is installed in the first shell and the second shell, so that the blower has good heat dissipation performance and avoids overheating of the rotor during high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a partially cutaway structural diagram of the air suspension centrifugal blower of the present invention.

[0028] Figure 2This is a structural diagram of the magnetic bearing assembly of the present invention.

[0029] Figure 3 It is a structural diagram of the inner shell of the present invention.

[0030] Figure 4 This is a diagram of the installation structure of the first magnetic bearing adjustment part and the second magnetic bearing adjustment part of the present invention.

[0031] Figure 5 This is a structural diagram of the second magnetic bearing adjustment unit of the present invention.

[0032] Figure 6 It is a structural diagram of the power unit of the present invention.

[0033] Figure 7 It is a structural diagram of the disc of the present invention.

[0034] Figure 8 This is a structural diagram of the position sensor of the present invention.

[0035] Markings in the accompanying drawings: base 1, impeller part 2, magnetic bearing assembly 3, rotor 4, first shell 5, stator core 6, stator coil 7, magnetic levitation controller 8, air duct outlet 21, second shell 31, inner shell 32, second electromagnetic coil 33, bearing 34, magnetic ring 35, disk 37, position sensing part 38, first electromagnetic coil 39, channel 51, first skeleton 310, second skeleton 311, first annular cavity 321, second annular cavity 322, first annular groove 323, disk body 371, sleeve 372, ring body 381, second position sensor 382, first position sensor 383. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more specific definition of the scope of protection of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Example 1: The specific structure of the present invention is as follows:

[0038] Please refer to the attached Figure 1-8 The present invention provides an air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure, comprising a base 1 and further comprising:

[0039] A power unit is mounted on the base 1 and includes a first housing 5, a stator mounted within the first housing 5, and a rotor 4 capable of being driven to rotate by the stator. Two integrally formed discs 37 are sleeved and fixed on the main shaft of the rotor 4. The opening of the disc body 371 of the disc 37 extends toward a side perpendicular to the disc surface to form a sleeve 372, which is fixed to the main shaft.

[0040] Two sets of impeller parts 2, the two sets of impeller parts 2 are installed on the machine base 1, and the impellers thereon are respectively installed at both ends of the main shaft of the rotor 4;

[0041] Two sets of magnetic bearing assemblies 3, which are installed on the machine base 1 and are respectively installed between the power unit and the two sets of impeller units 2. The magnetic bearing assembly 3 includes a second outer shell 31, an inner shell 32 installed in the second outer shell 31, a position sensor 38 installed in the inner shell 32 and used to sense whether the disc 37 is offset, a first magnetic bearing adjustment unit for adjusting the X-axial position of the disc 371 according to an X-axis offset signal generated by the position sensor 38 when sensing the position of the disc 371, and a second magnetic bearing adjustment unit for adjusting the longitudinal position of the disc 371 according to a longitudinal offset signal generated by the position sensor 38 when sensing the position of the main shaft;

[0042] The air suspension centrifugal blower further includes a heat dissipation system, which is distributed on the first housing 5 of the power unit and the second housings 31 of the two sets of magnetic bearing assemblies 3 .

[0043] A preferred technical solution of this embodiment: the heat dissipation system is a water-cooled heat dissipation system.

[0044] A preferred technical solution of this embodiment: the first shell 5 has a through cavity running through both ends, and a plurality of channels 51 running through the annular surface and distributed in a ring array are provided on the annular surface at both ends, and the channels are used to install the water cooling pipes of the water cooling heat dissipation system.

[0045] A preferred technical solution of this embodiment: the stator includes a stator core 6 and a stator coil 7 wound around the stator core 6 , and the stator core 6 is fixed in the first housing 5 .

[0046] A preferred technical solution of this embodiment: the position sensing unit 38 is fixed in the first annular groove 323 of the axial hole opening at one end of the inner shell 32, and includes a ring body 381, a plurality of first position sensors 383 installed on one annular surface of the ring body 381 and distributed in a ring array, and a plurality of second position sensors 382 installed on the inner ring of the ring body 381 and distributed in a ring array;

[0047] The first annular groove 323 is provided with a plurality of annular array through holes, and the first position sensor 383 passes through the through holes, with its sensing direction facing the disk body 371;

[0048] The sensing direction of the second position sensor 382 is toward the main shaft.

[0049] A preferred technical solution of this embodiment: the inner shell 32 has an axial hole passing through both ends and adjacent first annular cavity 321 and second annular cavity 322 are provided in the inner shell 32, the first magnetic bearing adjustment part is installed in the first annular cavity 321, and the second magnetic bearing adjustment part is installed in the second annular cavity 322.

[0050] A preferred technical solution of this embodiment is as follows: the disk 37 is disposed in the inner shell 32, with its disk body 371 located in the first annular cavity 321, and its sleeve 372 extending into the second annular cavity 322. The magnetic ring 35 is sleeved and fixed on the sleeve 372 located in the second annular cavity 322;

[0051] The first magnetic bearing adjustment portion includes a first frame 310 and a first electromagnetic coil 39 wound within the first frame 310. An adjustment gap is left between the inner ring of the first frame 310 and the disc 371 and the sleeve 372. The winding direction of the first electromagnetic coil 39 satisfies the following requirements: the magnetic field generated by the first electromagnetic coil 39 can drive the disc 371 to move radially along the main shaft.

[0052] The second magnetic bearing adjustment part includes a second skeleton 311 and multiple groups of second electromagnetic coils 33 wound on the second skeleton 311. An adjustment gap is left between the second skeleton 311 and the magnetic ring 35. The multiple groups of second electromagnetic coils 33 are distributed in a ring array on the second skeleton 311. The direction of the magnetic field generated by them can drive the magnetic ring 35 to drive the disk 371 and the main shaft to move in the longitudinal plane.

[0053] A preferred technical solution of this embodiment is: the first skeleton 310 is provided with a third annular cavity concentric with the first annular cavity 321 , and the first electromagnetic coil 39 is wound along the circumferential direction of the third annular cavity.

[0054] A preferred technical solution of this embodiment: bone positions for winding the second electromagnetic coil 33 are distributed in a ring array between the outer ring and the inner ring of the second skeleton 311, and each bone position points to the center of the second skeleton 311 and coincides with the center of the second annular cavity 322, and a group of second electromagnetic coils 33 are wound on each bone position.

[0055] A preferred technical solution of this embodiment is as follows: the impeller part 2 has a worm gear housing and an impeller installed in the worm gear housing, and the air duct outlet 21 of the worm gear housing faces upward.

[0056] Example 2:

[0057] The following is the working principle of the air suspension centrifugal blower of the present invention:

[0058] like Figure 1-8 As shown, the disc 37 and the main shaft of the present invention rotate synchronously and coaxially. When the second electromagnetic coil 33 is supplied with alternating current, the electromagnetic field generated by the second electromagnetic coil 33 can act on the magnetic ring 35.

[0059] Taking the magnetic ring 35 as an example, how to make the spindle offset and then correct it, such as Figure 8 As shown, when the main shaft is not offset, the distance between the main shaft and each second position sensor 382 is equal. When the main shaft is offset to one side, the second position sensor 382 will immediately sense the position change of the main shaft, and send the offset position signal to the magnetic levitation controller 8. The magnetic levitation controller 8 controls one or more second electromagnetic coils 33 that are farther away from the main shaft to be powered on. After the one or more second electromagnetic coils 33 that are farther away from the main shaft are powered on, an electromagnetic field is generated to act on the magnetic ring 35, and the magnetic ring 35 is attracted to move toward the one or more second electromagnetic coils 33 that are powered on until the correction is accurate.

[0060] Similarly, the disc 37 includes a magnetic material on the disc 37, which is acted upon by the energized first electromagnetic coil 39. When the spindle's axial position deviates from a preset standard position, the distance between the first position sensor 383 and the disc 371 increases or decreases. The first position sensor 383 senses this position change and transmits a position signal indicating the deviation to the magnetic levitation controller 8. The magnetic levitation controller 8 then energizes the first electromagnetic coil 39, generating an electromagnetic field that acts on the disc 371.

[0061] When the distance between the first position sensor 383 and the disk 371 increases, the electromagnetic field generated by the first electromagnetic coil 39 after power-on generates an attractive force on the disk 371 , and attracts the disk 371 back to the preset standard position.

[0062] When the distance between the first position sensor 383 and the disk 371 decreases, the electromagnetic field generated by the powered-on first electromagnetic coil 39 generates a repulsive force on the disk 371 , repelling the disk 371 back to a preset standard position.

[0063] Because the two magnetic bearing assemblies 3 are symmetrically mounted, both are equipped with a magnetic suspension controller 8. When the distance between the first position sensor 383 and the disk 371 on one side increases, the distance between the first position sensor 383 and the disk 371 on the other side decreases. Based on these two states, the two magnetic suspension controllers 8 control the power-on direction of their respective first electromagnetic coils 39, that is, the direction of the electromagnetic field of the first electromagnetic coils 39.

[0064] Since the two sets of second electromagnetic coils 33 act on the magnetic ring 35 in the longitudinal direction, the two sets of second electromagnetic coils 33 only need to control the power-on strength according to the offset distance of their corresponding magnetic ring 35 .

[0065] By adjusting the position of the rotor 4 through the two sets of magnetic bearing assemblies 3 of the present invention, the rotor 4 can be quickly corrected to avoid collision between the rotor 4 and the inner wall.

[0066] The rotation of the rotor 4 drives the impellers on both sides to rotate. The impellers rotate at high speed in the worm gear structure shell to generate high-speed airflow, which is discharged through the two air duct outlets 21 to provide a high-speed air source for the blower.

[0067] Example 3:

[0068] The inner housing 32 has a second annular groove at one end away from the position sensing portion 38 , in which a bearing 34 is mounted. The inner sleeve of the bearing 34 is fixed to the outer end of the sleeve 372 .

[0069] Example 4:

[0070] The heat dissipation system of the present invention is a water-cooled heat dissipation system. In the water-cooled heat dissipation system, a heat dissipation water pipe is passed through the channel 51, and the heat dissipation water pipe 51 dissipates heat by supercooling water.

[0071] In summary, the air suspension centrifugal blower of the present invention uses two sets of magnetic bearing assemblies 3 to adjust the position of the rotor 4. When the rotor 4 is axially offset during its suspended rotation, the axial position of the rotor 4 is adjusted by the first magnetic bearing adjustment unit. When the rotor is longitudinally offset during its suspended rotation, the longitudinal position of the rotor 4 is adjusted by the second magnetic bearing adjustment unit. The two sets of magnetic bearing assemblies 3 prevent the rotor 4 from colliding with the inner wall of the shell, reducing friction and thereby increasing the service life of the rotor. A water-cooled heat dissipation system is installed in the first shell 5 and the second shell 31, giving the blower excellent heat dissipation performance and preventing the rotor 4 from overheating during high-speed rotation.

[0072] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. An air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure, comprising a base (1), characterized in that: Also includes: A power unit is installed on the machine base (1), comprising a first housing (5), a stator installed in the first housing (5), and a rotor (4) capable of being driven by the stator to perform rotational motion, two integrated discs (37) are sleeved and fixed on the main shaft of the rotor (4), and the mouth of the disc body (371) of the disc (37) extends toward a side perpendicular to the disc surface to form a shaft sleeve (372), which is fixed on the main shaft; Two sets of impeller parts (2), the two sets of impeller parts (2) are mounted on the machine base (1), and the impellers thereon are respectively mounted on both ends of the main shaft of the rotor (4); Two groups of magnetic suspension bearing assemblies (3), the two groups of magnetic suspension bearing assemblies (3) are installed on the machine base (1) and the two groups of magnetic suspension bearing assemblies (3) are respectively installed between the power part and the two groups of impeller parts (2), the magnetic suspension bearing assemblies (3) include a second outer shell (31), an inner shell (32) installed in the second outer shell (31), a position sensing part (38) installed in the inner shell (32) and used to sense whether the disk (37) is offset, a first magnetic suspension bearing adjustment part for adjusting the X-axis position of the disk (371) according to an X-axis offset signal generated by the position sensing part (38) sensing the position of the disk (371), and a second magnetic suspension bearing adjustment part for adjusting the longitudinal position of the disk (371) according to a longitudinal offset signal generated by the position sensing part (38) sensing the position of the main shaft; The air suspension centrifugal blower further comprises a heat dissipation system, which is distributed on the first housing (5) of the power unit and the second housings (31) of the two sets of magnetic suspension bearing assemblies (3); The inner shell (32) has an axial hole passing through both ends, and a first annular cavity (321) and a second annular cavity (322) adjacent to each other are provided in the inner shell (32), the first magnetic bearing adjustment portion is installed in the first annular cavity (321), and the second magnetic bearing adjustment portion is installed in the second annular cavity (322); The disc (37) is arranged in the inner shell (32), the disc body (371) is located in the first annular cavity (321), the shaft sleeve (372) extends to the second annular cavity (322), and a magnetic ring (35) is sleeved and fixed on the shaft sleeve (372) located in the second annular cavity (322); The first magnetic bearing adjustment portion comprises a first frame (310), a first electromagnetic coil (39) wound inside the first frame (310), an adjustment gap is left between the inner ring of the first frame (310), the disk (371), and the shaft sleeve (372), and the winding direction of the first electromagnetic coil (39) satisfies: the magnetic field generated by the first electromagnetic coil (39) can drive the disk (371) to move radially along the main shaft; The second magnetic bearing adjustment portion includes a second skeleton (311) and multiple groups of second electromagnetic coils (33) wound on the second skeleton (311). An adjustment gap is left between the second skeleton (311) and the magnetic ring (35). The multiple groups of second electromagnetic coils (33) are distributed in a ring array on the second skeleton (311). The direction of the magnetic field generated by them can drive the magnetic ring (35) to drive the disk (371) and the main shaft to move in the longitudinal plane.

2. The air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure according to claim 1 is characterized in that: The heat dissipation system is a water-cooling heat dissipation system.

3. The air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure according to claim 2 is characterized in that: The first shell (5) has a through cavity passing through both ends, and a plurality of channels passing through the annular surfaces and distributed in an annular array are provided on the annular surfaces at both ends, and the channels are used to install water cooling pipes of the water cooling heat dissipation system.

4. The air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure according to claim 1 is characterized in that: The stator comprises a stator core (6) and a stator coil (7) wound around the stator core (6), and the stator core (6) is fixed in the first housing (5).

5. The air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure according to claim 1 is characterized in that: The position sensing portion (38) is fixed in a first annular groove (323) at an end of the axial hole of the inner shell (32), and comprises a ring body (381), a plurality of first position sensors (383) installed on an annular surface of the ring body (381) and distributed in an annular array, and a plurality of second position sensors (382) installed on an inner ring of the ring body (381) and distributed in an annular array; The first annular groove (323) is provided with a plurality of annular array through holes, and the first position sensor (383) passes through the through holes, with its sensing direction facing the disk body (371); Wherein, the sensing direction of the second position sensor (382) is toward the main shaft.

6. The air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure according to claim 1 is characterized in that: The first skeleton (310) is provided with a third annular cavity concentric with the first annular cavity (321), and the first electromagnetic coil (39) is wound along the circumferential direction of the third annular cavity.

7. The air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure according to claim 1 is characterized in that: Bone positions for winding the second electromagnetic coil (33) are distributed in a ring array between the outer ring and the inner ring of the second skeleton (311), and each bone position points to the center of the second skeleton (311) and the center of the second annular cavity (322) so as to coincide with each other, and a group of second electromagnetic coils (33) are wound on each bone position.

8. The air suspension centrifugal blower with a double-head high-efficiency self-cooling separated ventilation structure according to claim 1 is characterized in that: The impeller part (2) comprises a worm gear housing and an impeller installed in the worm gear housing, and the air duct outlet (21) of the worm gear housing faces upward.

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