Magnetic suspension high-speed single-stage centrifugal fan

Abstract

The magnetic suspension high-speed single-stage centrifugal fan comprises a fan body, the fan body comprises an outer shell and a magnetic suspension driving assembly located in the outer shell, a containing groove is formed in the surface of the outer shell, a cooling channel is fixedly connected in the containing groove, a protective shell is fixedly arranged outside the cooling channel in a sleeved mode, and the magnetic suspension driving assembly is located in the protective shell. Cooling liquid is guided into the cooling channel from the drainage pipeline, so that the cooling liquid cools and dissipates heat of the shell, heat of a rotor in the shell is indirectly dissipated in a heat conduction mode, a partition plate is arranged in the centrifugal fan, and external cold air is guided into the centrifugal fan through a set of ventilation pipes on the shell, so that heat dissipation of the rotor in the shell is achieved. Cold air penetrates through the multiple ventilation holes and then is concentrated on the other set of ventilation pipes on the installation plate to be exhausted, the heat dissipation effect of the centrifugal fan is effectively improved in an air cooling and water cooling mode, and the situation that in the using process of the centrifugal fan, due to the fact that the temperature is too high, a rotor is unstable is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a centrifugal fan, in particular to a kind of magnetic suspension high-speed single-stage centrifugal fan applied to centrifugal fan field. BACKGROUND

[0002] ‌The working principle of magnetic suspension centrifugal fan is mainly based on magnetic suspension technology, three-dimensional flow impeller technology and high-speed permanent magnet synchronous motor technology, contactless suspension is realized by magnetic suspension bearing technology, position sensor is built-in in magnetic suspension bearing, position signal of rotating shaft is detected in real time, and these signals are processed by controller, control current is generated, and then controllable electromagnetic force is generated, the stable suspension of rotating shaft is realized, mechanical friction is eliminated, noise and vibration are reduced, and service life is prolonged‌.

[0003] In the operation process of magnetic suspension centrifugal fan, centrifugal fan relies on electromagnetic force to maintain rotor suspension, and current is large when running at high speed, rotor and surrounding gas generate heat by friction, eddy current in metal parts also generates heat, winding generates heat significantly, high temperature can cause permanent magnet demagnetization or electromagnetic coil resistance increase, reduce suspension stability, and even cause rotor instability. SUMMARY

[0004] For the above prior art, the technical problem to be solved by the utility model is that the internal current of magnetic suspension centrifugal fan is large when using, rotor and surrounding gas generate heat by friction, so that centrifugal fan is in high heat state, and high temperature can cause permanent magnet demagnetization or electromagnetic coil resistance increase, reduce suspension stability, and even cause rotor instability.

[0005] To solve the above problems, the utility model provides a kind of magnetic suspension high-speed single-stage centrifugal fan, including fan body, fan body includes shell and the magnetic suspension drive assembly in shell, the surface of shell is excavated and is fixedly connected with cooling channel in accommodating groove, cooling channel is fixedly connected with the protective shell of outer fixed sleeve, the outer surface of protective shell is fixedly connected with two drain pipes, the surface of shell is fixedly connected with two groups of ventilation pipes, and the inner wall of shell is fixedly connected with two partition plates, the surface of partition plate is excavated and is fixedly connected with multiple ventilation holes, two partition plates are located between two groups of ventilation pipes, multiple fixed rods are fixedly connected between two partition plates, the right end of partition plate is fixedly connected with mounting ring, the outer surface of mounting ring is rotatably sleeved with adjusting ring, the outer ring surface of adjusting ring is fixedly connected with multiple blades, and the surface of blade is excavated and is fixedly connected with multiple buffer holes.

[0006] In the above-mentioned magnetic suspension high-speed single-stage centrifugal fan, the cooling liquid is introduced into the cooling channel from the drainage pipeline to cool and radiate the shell, and the rotor inside the shell is indirectly radiated by heat conduction. The hollow plate is arranged inside the centrifugal fan, the external cold air is introduced into the centrifugal fan through a group of ventilation pipes on the shell, the cold air passes through a plurality of ventilation holes and is discharged through another group of ventilation pipes on the mounting plate, the heat dissipation effect of the centrifugal fan is effectively improved by air cooling and water cooling, and the instability of the rotor caused by high temperature during use of the centrifugal fan is effectively avoided.

[0007] As a further improvement of the present application, a temperature sensor is mounted on the outer surface of the shell, and the temperature sensor is signal connected with an external controller.

[0008] As a further improvement of the present application, the cooling channel is spiral, and the two drainage pipes are respectively located at the two ports of the cooling channel.

[0009] As a further improvement of the present application, the plurality of ventilation holes are arranged in a ring array around the central axis of the hollow plate, and the diameters of the plurality of ventilation holes are consistent.

[0010] As a further improvement of the present application, the diameters of the plurality of ventilation holes are not consistent, the diameters of the plurality of ventilation holes on the right hollow plate gradually increase away from the ventilation pipe, and the diameters of the plurality of ventilation holes on the left hollow plate gradually decrease away from the ventilation pipe.

[0011] As a further improvement of the present application, the left end of the blade is in contact with the hollow plate, and the blade is in an inclined state.

[0012] As a further improvement of the present application, the left end of the blade is in contact with the hollow plate, and the blade is in an inclined state. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present application;

[0014] Figure 2 It is a structural cross-sectional view of the first embodiment of the present application;

[0015] Figure 3 A schematic diagram of the cooling channel structure of the first embodiment of the present application;

[0016] Figure 4 A schematic diagram of the partition plate structure of the first embodiment of the present application;

[0017] Figure 5 A sectional view of the structure of the second embodiment of the present application;

[0018] Figure 6 A schematic diagram of the fixing rod structure of the second embodiment of the present application;

[0019] Figure 7 A schematic diagram of the partition plate structure of the second embodiment of the present application;

[0020] Figure 8 A schematic diagram of the blade structure of the second embodiment of the present application.

[0021] Explanation of the reference numerals in the drawings:

[0022] 1 fan body, 101 housing, 102 magnetic levitation driving assembly, 2 accommodating groove, 3 cooling channel, 4 protective shell, 5 drain pipe, 6 ventilation pipe, 7 partition plate, 8 ventilation hole, 9 fixing rod, 10 mounting ring, 11 adjusting ring, 12 blade, 13 buffer hole, 14 temperature sensor. DETAILED DESCRIPTION

[0023] The two embodiments of the present application will be described in detail below with reference to the drawings.

[0024] First embodiment:

[0025] Figure 1 、 Figure 2 、 Figure 3 and Figure 4The utility model shows: a kind of magnetic suspension high-speed single-stage centrifugal fan, including fan body 1, fan body 1 includes shell 101 and the magnetic suspension drive assembly 102 in shell 101, the outer surface of shell 101 is equipped with temperature sensor 14, and the person skilled in the art can select suitable model of temperature sensor 14 according to actual needs, for example WZP-231, temperature sensor 14 can monitor the temperature of fan body 1 in real time, when temperature is too high, fan body 1 can be cooled by air cooling and water cooling, temperature sensor 14 is signal connected with external controller, and the surface of shell 101 is excavated with accommodating groove 2, and cooling channel 3 is fixedly connected in accommodating groove 2, protective shell 4 is fixedly covered outside cooling channel 3, the outer surface of protective shell 4 is fixedly connected with two drain pipes 5, cooling channel 3 is spiral, and two drain pipes 5 are located at the two ports of cooling channel 3 respectively, cooling liquid is guided into the inside of cooling channel 3 from one drain pipe 5, and then is discharged through another drain pipe 5, so that cooling liquid carries out temperature reduction and heat dissipation to shell 101, and the magnetic suspension drive assembly 102 inside shell 101 is indirectly cooled by the mode of heat conduction, the surface of shell 101 is fixedly connected with two groups of ventilation pipes 6, and the inner wall of shell 101 is fixedly connected with two partition plates 7, a plurality of ventilation holes 8 are excavated in the surface of partition plate 7, two partition plates 7 are located between two groups of ventilation pipes 6, a plurality of ventilation holes 8 are annularly arrayed around the central axis of partition plate 7, and the aperture of a plurality of ventilation holes 8 is consistent, and external cold air is introduced into the inside of fan body 1 by one group of ventilation pipes 6 on shell 101, so that cold air passes through a plurality of ventilation holes 8 and is discharged in another group of ventilation pipes 6, to effectively improve fan heat dissipation effect.

[0026] By installing spiral cooling channel 3 at the shell 101 of fan body 1, cooling liquid is guided into the inside of cooling channel 3 from one drain pipe 5, and then is discharged through another drain pipe 5, so that cooling liquid carries out temperature reduction and heat dissipation to shell 101, and the magnetic suspension drive assembly 102 inside shell 101 is indirectly cooled by the mode of heat conduction, partition plate 7 is arranged in the inside of centrifugal fan, and partition plate 7 is located outside magnetic suspension drive assembly 102, external cold air is introduced into the inside of fan body 1 by one group of ventilation pipes 6 on shell 101, so that cold air passes through a plurality of ventilation holes 8 and is discharged in another group of ventilation pipes 6, to effectively improve fan heat dissipation effect, and then effectively avoid the situation that rotor is unstable due to temperature being too high during use of fan.

[0027] Second embodiment:

[0028] The utility model discloses on the basis of first kind of implementation, add fixed rod 9, mounting ring 10, adjusting ring 11, blade 12 and buffer hole 13, and the rest with first kind of implementation remain identical.

[0029] Figure 5 ,Figure 6 、 Figure 7 and Figure 8 It is shown that: a plurality of fixed rods 9 are fixedly connected between the two space plates 7, the right end of the space plate 7 is fixedly connected with a mounting ring 10, the outer surface of the mounting ring 10 is rotatably sleeved with an adjusting ring 11, the outer ring surface of the adjusting ring 11 is fixedly connected with a plurality of blades 12, the left end of the blade 12 is in contact with the space plate 7, and the blade 12 is in an inclined state, a plurality of buffer holes 13 are opened on the surface of the blade 12, the blade 12 rotates and disturbs the airflow, thereby increasing the uniformity of the airflow, and part of the airflow is allowed to penetrate the blade 12 through the buffer hole 13, thereby forming a secondary jet flow, reducing the windward surface pressure peak of the blade 12, reducing vortex shedding, the jet flow and the main airflow are mixed, and the airflow uniformity is effectively improved, the diameters of the plurality of ventilation holes 8 are different, the diameters of the plurality of ventilation holes 8 on the space plate 7 on the right side gradually increase away from the ventilation pipe 6, and the diameters of the plurality of ventilation holes 8 on the space plate 7 on the left side gradually decrease away from the ventilation pipe 6, through the plurality of ventilation holes 8 with gradually changing diameters, the resistances of different regions on the surface of the space plate 7 are different, the airflow velocity gradient is compensated, and the cooling effect and uniformity are improved.

[0030] When the magnetic suspension driving assembly 102 in the fan body 1 is cooled by air cooling, since the ventilation pipes 6 are located on one side of the shell 101, the cold air may directly flow out through the adjacent ventilation holes 8 after entering the shell 101 through the ventilation pipes 6, so that the cold air entering the shell 101 is not uniformly distributed, and only one side of the magnetic suspension driving assembly 102 can be cooled, thereby reducing the cooling effect, through the plurality of ventilation holes 8 with gradually changing diameters, the resistances of different regions on the surface of the space plate 7 are different, the airflow velocity gradient is compensated, and at the same time, the blade 12 generates a circumferential motion under the action of the airflow, and the airflow is diffused outward through the centrifugal effect, thereby breaking the inertia path of the original airflow, effectively improving the uniformity of the airflow in the shell 101, and thereby cooling different parts of the magnetic suspension driving assembly 102, and effectively improving the cooling effect.

[0031] In combination with the current actual demand, the above-mentioned embodiments adopted by the present application are not limited to this, various changes made within the knowledge range of those skilled in the art without departing from the concept of the present application still fall within the protection range of the present application.

Claims

1. A magnetic levitation high-speed single-stage centrifugal fan comprising a fan body (1), characterized in that: The fan body (1) includes an outer shell (101) and a magnetic suspension driving assembly (102) located in the outer shell (101), the surface of the outer shell (101) is provided with a containing groove (2), the containing groove (2) is fixedly connected with a cooling channel (3), the cooling channel (3) is fixedly connected with a protective shell (4), the outer surface of the protective shell (4) is fixedly connected with two drain pipes (5), the surface of the outer shell (101) is fixedly connected with two groups of ventilation pipes (6), and the inner wall of the outer shell (101) is fixedly connected with two space plates (7), the surface of the space plate (7) is provided with a plurality of ventilation holes (8), and the two space plates (7) are located between the two groups of ventilation pipes (6). A plurality of fixing rods (9) are fixedly connected between the two space plates (7), the right end of the space plate (7) is fixedly connected with a mounting ring (10), the outer surface of the mounting ring (10) is rotatably provided with an adjusting ring (11), the outer surface of the adjusting ring (11) is fixedly connected with a plurality of blades (12), and the surface of the blade (12) is provided with a plurality of buffer holes (13).

2. A magnetic levitation high-speed single-stage centrifugal fan according to claim 1, characterized in that: The outer surface of the outer shell (101) is provided with a temperature sensor (14), and the temperature sensor (14) is signal connected with an external controller.

3. The magnetic levitation high-speed single-stage centrifugal fan according to claim 1, characterized in that: The cooling channel (3) is spiral-shaped, and the two drain pipes (5) are located at the two ports of the cooling channel (3) respectively.

4. The magnetic levitation high-speed single-stage centrifugal fan according to claim 1, characterized in that: The plurality of ventilation holes (8) are arranged in a ring array around the central axis of the space plate (7), and the diameters of the plurality of ventilation holes (8) are consistent.

5. The magnetic levitation high-speed single-stage centrifugal fan according to claim 1, characterized in that: The diameters of the plurality of ventilation holes (8) are different, the diameters of the plurality of ventilation holes (8) on the right space plate (7) gradually increase away from the ventilation pipe (6), and the diameters of the plurality of ventilation holes (8) on the left space plate (7) gradually decrease away from the ventilation pipe (6).

6. A magnetic levitation high-speed single-stage centrifugal fan according to claim 1, characterized in that: The left end of the blade (12) is in contact with the space plate (7), and the blade (12) is in an inclined state.

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