CN220956198U - Pressure balancing mechanism of air suspension centrifugal blower - Google Patents
Pressure balancing mechanism of air suspension centrifugal blower Download PDFInfo
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- CN220956198U CN220956198U CN202322315420.6U CN202322315420U CN220956198U CN 220956198 U CN220956198 U CN 220956198U CN 202322315420 U CN202322315420 U CN 202322315420U CN 220956198 U CN220956198 U CN 220956198U
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- motor
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- compressor
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- 239000000725 suspension Substances 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of centrifugal blowers, in particular to a pressure balancing mechanism of an air suspension centrifugal blower. The motor comprises a motor seat, wherein a motor is arranged in the motor seat, a second air bearing and a third air bearing are arranged at two ends of a motor rotor of the motor, and the second air bearing and the third air bearing are in rotary fit with the motor rotor; the two ends of the motor seat are fixedly provided with a first compressor shell and a second compressor shell, the first compressor shell and the second compressor shell are provided with an air inlet and a sealing cover plate, and the sealing cover plate is matched with the compressor impeller; a first air bearing is further arranged at one end of the motor rotor, which is close to the second compressor shell, and a back-of-wheel pressure cavity is arranged between the compressor impeller and the sealing cover plate; and the sealing cover plate is provided with a pressure relief hole. The pressure relief holes are formed in the sealing cover plate, so that the air bearing is uniformly stressed, and the requirements of high pressure and large flow products are met.
Description
Technical Field
The utility model relates to the technical field of centrifugal blowers, in particular to a pressure balancing mechanism of an air suspension centrifugal blower.
Background
The air suspension centrifugal blower has the advantages of high efficiency, energy saving, environmental protection and the like, and is widely applied in a plurality of industries. As the air quantity required by users is larger and the required pressure is higher, the air suspension products which adopt the double compressors to meet the demands of the users are more and more, and the pressure requirements borne by the impeller backs of the centrifugal compressors of the double compressors are also higher and more. In the prior art, the space of the wheel back pressure cavity is limited, the working pressure of the air compressor is continuously increased along with the continuous lifting of the rotating speed of the impeller, the pressure of the wheel back pressure cavity is also continuously increased, at the moment, the shafting is easy to vibrate, the riding thrust of the air bearing is extremely easy to be increased instantaneously, and therefore the air bearing is unbalanced, and the air bearing is damaged.
Disclosure of utility model
Aiming at the defects, the utility model provides the pressure balancing mechanism of the air suspension centrifugal blower, so that the problems that in the prior art, as the working pressure of a compressor is continuously increased, a shafting is easy to vibrate, the stress of an air bearing is unbalanced and the air bearing is damaged are solved.
The utility model is realized by using the following technical scheme: the pressure balancing mechanism of the air suspension centrifugal blower comprises a motor seat, wherein a motor is arranged in the motor seat, a second air bearing and a third air bearing are arranged at two ends of a motor rotor of the motor, and the second air bearing and the third air bearing are in rotary fit with the motor rotor;
The two ends of the motor seat are fixedly provided with a first compressor shell and a second compressor shell, the first compressor shell and the second compressor shell are provided with an air inlet and a sealing cover plate, and the sealing cover plate is matched with the compressor impeller; a first air bearing is further arranged at one end of the motor rotor, which is close to the second compressor shell, and a back-of-wheel pressure cavity is arranged between the compressor impeller and the sealing cover plate;
And the sealing cover plate is provided with a pressure relief hole.
Furthermore, a circular groove is formed in the middle of one side of the sealing cover plate.
Further, the outer edge of the circular groove is provided with a plurality of first annular ribs, the edge of the compressor impeller is provided with a plurality of second annular ribs, and the first annular ribs are matched with the second annular ribs.
Further, the pressure relief hole is formed in the inner side of the circular groove.
Further, the pressure relief holes are arranged in an annular array.
Further, the air inlet is in a horn shape.
Furthermore, a plurality of protruding ribs are arranged on the outer side of the motor base.
The pressure balancing mechanism of the air suspension centrifugal blower provided by the utility model is different from the prior art in that the pressure balancing mechanism is characterized in that the pressure of the air suspension centrifugal blower is relieved by opening the hole on the sealing cover, so that when the back pressure of the wheel is high, a part of pressure is relieved to keep the balance of the shafting, and therefore, the air bearing is uniformly stressed, and the requirements of high pressure and large flow products are met; the middle part of the sealing cover plate is concave, so that the space of the back pressure cavity is further enlarged, and the pressure borne by the back pressure cavity is further increased. In addition, the outer surface of the motor base is provided with a plurality of convex edges, so that the contact area between the motor base and the outside is increased, the heat dissipation of the motor is increased, and the motor is protected.
An air suspension centrifugal blower pressure balance mechanism of the present utility model is further described below with reference to the drawings.
Drawings
FIG. 1 is a cross-sectional view of an air suspension centrifugal blower pressure balancing mechanism of the present utility model;
FIG. 2 is a diagram of a relief vent structure;
FIG. 3 is an enlarged view of a portion of the area "B" of FIG. 1;
Fig. 4 is a partial enlarged view of the area "a" in fig. 1.
In the figure: the air compressor comprises a first compressor shell, a 2-compressor impeller, a 3-sealing cover plate, a 4-air outlet cover, a 5-first bearing seat, a 6-motor seat, a 7-motor, a 8-second bearing seat, a 9-second compressor shell, a 10-first air bearing, a 11-third bearing seat, a 12-motor rotor, a 13-pressure relief hole, a 14-wheel back pressure cavity, a 15-second air bearing, a 16-third air bearing and a 17-air inlet.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific examples described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1 to 4, the pressure balancing mechanism of the air suspension centrifugal blower provided by the utility model comprises a motor seat 6, wherein a motor 7 is fixedly arranged in the motor seat 6, and two ends of a motor rotor 12 in the middle of the motor 7 are respectively provided with a compressor impeller 2; the two ends of the motor rotor 12 are also respectively provided with a second air bearing 15 and a third air bearing 16, the second air bearing 15 is matched with the first bearing seat 5, the third air bearing 16 is matched with the second bearing seat 8, and the first bearing seat 5 and the second bearing seat 8 are respectively and fixedly arranged at the two ends of the motor seat 6. The motor 7 and the motor rotor 12 are precisely controlled by the frequency converter to rotate, and the device has the advantages of high power density, small volume, high efficiency, energy saving, high rotating speed, stable operation, low noise and the like, and the motor rotor 12 is directly connected with the compressor impeller 2 without power transmission loss.
The two ends of the motor seat 6 are fixedly provided with a first compressor shell 1 and a second compressor shell 9, the first compressor shell 1 and the second compressor shell 9 are provided with an air inlet 17 and a sealing cover plate 3, and the sealing cover plate 3 is matched with the compressor impeller 2; an air outlet cover 4 is fixedly arranged on the first compressor shell 2; a third bearing seat 11 is fixedly arranged on the second compressor housing 9, a first air bearing 10 is arranged on the third bearing seat 11, and the first air bearing 10 is matched with a motor rotor 12. A back pressure cavity 14 is arranged between the compressor impeller 2 and the sealing cover plate 3; the sealing cover plate 3 is provided with a plurality of pressure relief holes 13. The compressor impeller 2 is driven by the motor rotor 12 to rotate, and forms a working channel with the compressor shell to complete the functions of air suction compression and working. The first air bearing 10 is an air thrust bearing, is mounted at one end of the motor rotor 12 to prevent the motor rotor 12 from moving in an axial direction during rotation, and the second air bearing 15 and the third air bearing 16 are radial air bearings. Its main purpose is to prevent the motor rotor 12 from being offset in the radial direction. By means of the three air bearings, a stable operation of the motor 7 and the motor rotor 12 is ensured.
When the motor rotor 12 rotates at a high speed, the air flow between the air bearing and the motor rotor 12 changes rapidly to generate tension, so that the foil of the air bearing is opened, the bearing is separated from the shaft, an air film is formed between the shaft and the bearing foil, a layer of complete air film is formed under aerodynamic effect by utilizing the transmissibility, adsorptivity and compressibility of air, the bearing supports the motor rotor 12 through an air film pressure field, the shaft of the motor rotor 12 is in a stable suspension state, and when the shaft rotates, the air film around the shaft has the function of error homogenization, so that the shaft always rotates in the center, the precision is high, and the vibration is small.
As a further illustration of this example, the middle part of one side of the sealing cover plate 3 is provided with a circular groove, the outer edge of the circular groove is provided with a plurality of first annular ribs, the edge of the compressor impeller 2 is also provided with a plurality of second annular ribs, and the first annular ribs are matched with the second annular ribs. The pressure relief holes 13 are arranged on the inner side of the circular groove, and a plurality of pressure relief holes 13 are arranged in an annular array. The sealing cover plate 3 is provided with a hole for pressure relief, and when the pressure in the back pressure cavity 14 is high, a part of the pressure is relieved to maintain the balance of the shafting. According to the different pressure requirements of practical application, the pressure balance of the back pressure cavity 14 can be achieved by providing pressure relief holes with different diameters and different numbers on the sealing cover plate 3.
As a further illustration of this example, the air inlet 17 is flared; the outer side of the motor base 6 is provided with a plurality of convex edges. Wherein, loudspeaker-shaped air inlet 17 is convenient for external gas's entering, and the setting of protruding stupefied on motor cabinet 6, the contact surface of messenger's motor cabinet 6 and external space increases to improved heat exchange efficiency, made motor 7 dispel the heat more easily.
Air is sucked from air inlets 17 at two ends of the air suspension centrifugal blower, compression work is performed through high-speed rotation of the compressor impeller 2, most of compressed air is output through the compressor shell and enters various different applications, and a small part of air enters the back pressure cavity 14 after passing through the first annular convex ridge and the second annular convex ridge at the back of the compressor impeller 2. When the rotating speed is low and the flow is low, the pressure of the back of the impeller 2 of the compressor is relatively low, and the thrust bearing at the two ends can be balanced stably only by the first air bearing 10. With the continuous increase of the rotation speed of the compressor impeller 2 of the impeller, the working pressure of the compressor is continuously increased, the pressure of the back of the impeller 2 of the compressor is relatively increased, and the gas can flow out of the back pressure cavity 14 from the pressure relief hole 13, so that the effect of balancing the pressure is achieved.
In summary, the pressure balancing mechanism of the air suspension centrifugal blower provided by the utility model is different from the prior art in that the pressure balancing mechanism is characterized in that the pressure relief 13 is formed by opening holes in the sealing cover plate 3, so that when the back pressure of the wheel is high, a part of pressure is relieved to keep the balance of the shaft system, and therefore, the air bearing is uniformly stressed, and the requirements of high pressure and large flow of products are met; the middle part of the sealing cover plate 3 is concave, so that the space of the back pressure cavity 14 is further enlarged, and the pressure borne by the back pressure cavity 14 is further increased. In addition, the outer surface of the motor base 6 is provided with a plurality of convex edges, so that the contact area between the motor base 6 and the outside is increased, the heat dissipation of the motor 7 is increased, and the motor 7 is protected.
Of course, the present utility model is capable of other various embodiments and its several details are capable of modification and variation in light of the present utility model by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (7)
1. The pressure balancing mechanism of the air suspension centrifugal blower is characterized by comprising a motor seat (6), wherein a motor (7) is arranged in the motor seat (6), a second air bearing (15) and a third air bearing (16) are arranged at two ends of a motor rotor (12) of the motor (7), and the second air bearing (15) and the third air bearing (16) are in rotary fit with the motor rotor (12);
The two ends of the motor seat (6) are fixedly provided with a first compressor shell (1) and a second compressor shell (9), the motor rotor (12) is provided with compressor impellers (2) close to the two ends of the first compressor shell (1) and the second compressor shell (9), the first compressor shell (1) and the second compressor shell (9) are provided with an air inlet (17) and a sealing cover plate (3), and the sealing cover plate (3) is matched with the compressor impellers (2); a first air bearing (10) is further arranged at one end of the motor rotor (12) close to the second compressor shell (9), and a back pressure cavity (14) is arranged between the compressor impeller (2) and the sealing cover plate (3);
The sealing cover plate (3) is provided with a pressure relief hole (13).
2. Air suspension centrifugal blower pressure balancing mechanism according to claim 1, characterized in that a circular groove is provided in the middle of one side of the sealing cover plate (3).
3. The air suspension centrifugal blower pressure balance mechanism according to claim 2, wherein the outer edge of the circular groove is provided with a plurality of first annular ribs, the edge of the compressor impeller (2) is provided with a plurality of second annular ribs, and the first annular ribs are matched with the second annular ribs.
4. An air suspension centrifugal blower pressure balancing mechanism according to claim 3, characterized in that the pressure relief holes (13) are provided inside the circular recess.
5. Air suspension centrifugal blower pressure balancing mechanism according to claim 4, characterized in that several of the pressure relief holes (13) are arranged in an annular array.
6. Air suspension centrifugal blower pressure balancing mechanism according to claim 1, characterized in that the air inlet (17) is trumpet-shaped.
7. The air suspension centrifugal blower pressure balance mechanism according to claim 1, wherein a plurality of ribs are arranged on the outer side of the motor base (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322315420.6U CN220956198U (en) | 2023-08-28 | 2023-08-28 | Pressure balancing mechanism of air suspension centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322315420.6U CN220956198U (en) | 2023-08-28 | 2023-08-28 | Pressure balancing mechanism of air suspension centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220956198U true CN220956198U (en) | 2024-05-14 |
Family
ID=90980272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322315420.6U Active CN220956198U (en) | 2023-08-28 | 2023-08-28 | Pressure balancing mechanism of air suspension centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220956198U (en) |
-
2023
- 2023-08-28 CN CN202322315420.6U patent/CN220956198U/en active Active
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