A sealed magnetic levitation blower

Abstract

The application relates to a sealed magnetic suspension blower, which comprises a motor part, an air chamber and an impeller, the motor is directly communicated with the air chamber, the impeller inhales air from the motor part during work, and the motor shell is sealingly connected with the air chamber. Compared with the structure of the traditional magnetic suspension blower, the air inlet is removed, and air is only inhaled from the motor part, so that the air leakage phenomenon of the traditional structure is effectively improved, the heat dissipation performance of the application is good, the service life is long, the structure of the application is simple, the manufacturing cost is low, and the application can be better popularized in the market.

Description

TECHNICAL FIELD

[0001] The present application relates to air distribution equipment, in particular to a sealed magnetic suspension blower. BACKGROUND

[0002] The magnetic suspension blower relies on the cooperation between the magnetic suspension bearing and the magnet to make the rotor inside the motor form suspension in the circumferential direction and the axial direction respectively, so that the rotor and the stator are not in contact, and the impeller is fixedly connected to the rotor, thereby achieving the effect of suspension together.

[0003] With the development of technology, the application range of the blower has also developed from initially conveying harmless gas or air conditioning indoors and outdoors to conveying chemical substances. Many chemical substances, such as acetylene, have the characteristics of being flammable, explosive and toxic, and once leaked, it will cause serious accidents. Therefore, the shaft sealing structure of the blower needs to have good sealing performance. In the current technology, in order to maintain the suspension effect of the rotor, the rotor of the blower and the shell wall of the air chamber cannot be in good contact, so that there is always a gap between the two, so that the gas in the air chamber is easily squeezed into the motor along the gap to form a leak through the motor cooling hole. SUMMARY

[0004] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, the abstract and the title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] To solve the technical problems reflected in the background art, the present application provides the following technical solutions:

[0006] A sealed magnetic suspension blower, comprising:

[0007] A flow guide channel, in which the airflow passes through;

[0008] A rotor and an impeller arranged in the flow guide channel and sequentially distributed therethrough;

[0009] Wherein, the suction end of the impeller faces the rotor, and the airflow exerts a pushing force on the rotor during the process of entering the flow guide channel, and the rotor forms axial suspension in the flow guide channel through the pushing force.

[0010] As a preferred technical solution of a sealed magnetic suspension blower, the flow guide channel comprises a motor arrangement area and an air chamber in communication, the rotor is located in the motor arrangement area, and the impeller is located in the air chamber, and the suction end thereof faces the motor arrangement area.

[0011] As a kind of preferred technical scheme of sealed magnetic suspension blower, the motor arrangement area has air inlet end, the rotor has opposite first end and second end along its axial direction, the first end forms empty contact force with the inner wall of motor arrangement area, and airflow enters motor arrangement area from air inlet end and forms air thrust on the second end.

[0012] As a kind of preferred technical scheme of sealed magnetic suspension blower, the inner wall of motor arrangement area and the second end are both configured with magnetic force, and the magnetic force at the two places is repulsive.

[0013] As a kind of preferred technical scheme of sealed magnetic suspension blower, the first end is configured with pressure receiving surface, and the pressure receiving surface is a planar structure, and the airflow from the air inlet end acts on the pressure receiving surface.

[0014] As a kind of preferred technical scheme of sealed magnetic suspension blower, the motor arrangement area and the second end are both provided with magnets, and the magnets at the two places are opposite to each other.

[0015] As a kind of preferred technical scheme of sealed magnetic suspension blower, the rotor is configured with through area along its axial direction, and the airflow passes through the through area.

[0016] As a kind of preferred technical scheme of sealed magnetic suspension blower, the motor arrangement area is fixedly provided with contact end, and the pressure receiving surface is in active contact with the contact end during the process of not receiving air thrust.

[0017] As a kind of preferred technical scheme of sealed magnetic suspension blower, the pressure receiving surface is annular and coaxial with the rotor, and the air inlet end is multiple and uniformly distributed along the circumferential direction of the pressure receiving surface.

[0018] As a kind of preferred technical scheme of sealed magnetic suspension blower, the pressure receiving surface and the contact end are in spherical contact.

[0019] The sealed magnetic suspension blower provided by the application has the following advantages:

[0020] 1 Compared with the traditional magnetic suspension blower structure, the air inlet is removed, and air is only inhaled at the place where the motor is located, thereby effectively improving the phenomenon of air leakage in the traditional structure.

[0021] 2 During operation, the airflow directly passes through the motor from inside the structure, thereby directly achieving the heat dissipation effect on the motor.

[0022] 3 The axial suspension of the rotor in the application is directly maintained by the air thrust during air intake when the rotor is suspended, thereby reducing the arrangement of excessive magnets, making the product structure of the application simpler and lighter, and the manufacturing cost lower, thereby better promoting the product in the market. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0024] Figure 1 This is a perspective view of an embodiment of the present invention.

[0025] Figure 2 for Figure 1 A schematic diagram of the internal cross-section of the structure shown.

[0026] Figure 3 for Figure 2 Another perspective view.

[0027] Figure 4 for Figure 2 The middle section is shown separately.

[0028] Figure 5 For Figure 4 Another perspective view.

[0029] Figure 6 for Figure 4 A breakdown diagram of the structure shown.

[0030] Figure 7 for Figure 1 A schematic diagram showing the arrangement of the components in the embodiment.

[0031] Figure 8 for Figure 1 A schematic diagram illustrating the operation of an embodiment.

[0032] Figure label:

[0033] 1. Air chamber; 2. Motor housing; 3. Impeller; 4. Air outlet; 5. Air inlet; 6. Contact end; 7. Shaft; 701. Shaft cylinder; 702. First ring plate; 703. Main support; 704. Second ring plate; 705. Secondary support; 706. Shaft; 8. Permanent magnet; 9. Stator winding; 10. Pressure surface; 11. Magnetic levitation bearing; 12. First contact magnet; 13. Second contact magnet. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description. In other instances, well-known methods, procedures, components, and circuits have not been described in detail as not to unnecessarily obscure aspects of the present application.

[0036] Second, the "one embodiment" or "an embodiment" referred to herein means a specific feature, structure, or characteristic under discussion. Each of such features, structures, or characteristics can be included in one or more embodiments of the present application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a single, special embodiment.

[0037] Third, the present application is described in relation to the accompanying drawings. In describing the embodiments of the present application, specific terminology is employed for the sake of clarity. However, the application is not intended to be limited to the specific terms so selected. A person skilled in the art will recognize that the same or equivalent parts can be employed without departing from the spirit and scope of the application, and it is therefore intended that the present application not be limited to the particular embodiment described exclusively herein.

[0038] The conventional magnetic suspension blower structure is provided with a separate air inlet on the air chamber, and the motor is arranged on the other side of the air chamber and keeps away from the air inlet. One end of the motor rotor penetrates the shell wall of the air chamber and extends into the air chamber, and an impeller is fixed on the end. The suction end of the impeller faces the air inlet. When the whole works, the air pressure in the air chamber is relatively high, so that the gas will leak into the motor through the penetration of the rotor in the shell wall of the air chamber, and then dissipate outward through the motor heat dissipation hole. Therefore, it has limitations. In view of this:

[0039] With reference to Figures 1-8 The embodiment of the present application provides a sealed magnetic suspension blower, which comprises a fixedly connected air chamber 1 and motor shell 2. Only an air outlet 4 is arranged on the air chamber 1, and the traditional separate air inlet is removed. One side of the air chamber 1 is in communication with the motor shell 2.

[0040] Regarding the motor, it is a brushless motor. Specifically, the stator winding 9 is fixed on the inner wall of the motor shell 2. The rotor is composed of a rotating shaft 7 and a permanent magnet 8 fixedly arranged on the rotating shaft 7. The rotating shaft 7 is fixedly connected with the impeller 3 located in the air chamber 1. The rotating shaft 7 is connected with the inner wall of the motor shell 2 through a magnetic suspension bearing 11. The magnetic suspension bearing 11 is used to provide circumferential suspension support for the rotating shaft 7 when it works. As shown in the perspective view, Figure 7 One end of the rotating shaft 7 on the right side is fixed with a first contact magnet 12. The motor shell 2 is fixed with a second contact magnet 13. The first contact magnet 12 and the second contact magnet 13 are opposite to each other in the same pole, so as to form a repelling effect.

[0041] As Figure 7As shown in the middle perspective view, the left end of the rotating shaft 7 is provided with an annular pressing surface 10, the motor housing 2 is provided with a plurality of air inlet ends 5 in the form of nozzles, and the motor is further provided with a contact end 6 in the form of a universal ball structure, which is in contact with the pressing surface 10, so as to cooperate with the repulsive force of the other end of the rotating shaft 7 to limit the entire rotor in a specific area in the axial direction. Figure 7 As shown in the middle perspective view, the left end of the rotating shaft 7 is provided with an annular pressing surface 10, the motor housing 2 is provided with a plurality of air inlet ends 5 in the form of nozzles, and the motor is further provided with a contact end 6 in the form of a universal ball structure, which is in contact with the pressing surface 10, so as to cooperate with the repulsive force of the other end of the rotating shaft 7 to limit the entire rotor in a specific area in the axial direction.

[0042] Based on this, compared with the prior art, the motor is in communication with the air chamber 1, and the only parts in communication with the outside are the air inlet ends 5 on the motor housing 2 and the air outlet 4 on the air chamber 1, and the air suction end of the impeller 3 directly faces the inside of the motor.

[0043] As shown in the middle perspective view, the left end of the rotating shaft 7 is provided with an annular pressing surface 10, the motor housing 2 is provided with a plurality of air inlet ends 5 in the form of nozzles, and the motor is further provided with a contact end 6 in the form of a universal ball structure, which is in contact with the pressing surface 10, so as to cooperate with the repulsive force of the other end of the rotating shaft 7 to limit the entire rotor in a specific area in the axial direction. Figure 8 As shown in the middle perspective view, the left end of the rotating shaft 7 is provided with an annular pressing surface 10, the motor housing 2 is provided with a plurality of air inlet ends 5 in the form of nozzles, and the motor is further provided with a contact end 6 in the form of a universal ball structure, which is in contact with the pressing surface 10, so as to cooperate with the repulsive force of the other end of the rotating shaft 7 to limit the entire rotor in a specific area in the axial direction. Figure 8 As shown in the middle perspective view, the left end of the rotating shaft 7 is provided with an annular pressing surface 10, the motor housing 2 is provided with a plurality of air inlet ends 5 in the form of nozzles, and the motor is further provided with a contact end 6 in the form of a universal ball structure, which is in contact with the pressing surface 10, so as to cooperate with the repulsive force of the other end of the rotating shaft 7 to limit the entire rotor in a specific area in the axial direction.

[0044] Compared with the prior art, the technical effects embodied by the present application are:

[0045] The entire shell structure is completely sealed except for the necessary air inlet ends 5 for air intake and the air outlet 4 for air exhaust, thereby eliminating the problem of gas leakage, and the overall structure is simple and the manufacturing cost is low.

[0046] In this invention, the axial suspension effect of the rotor is achieved by utilizing the pressure during air intake, thereby reducing the need for excessive magnet arrangement, further controlling manufacturing costs, and also reducing product weight.

[0047] When the invention is in operation, the airflow enters from the outside and completely passes through the motor part, thereby achieving effective heat dissipation of the motor. Therefore, there is no need to place a separate heat dissipation structure, which further controls the manufacturing cost.

[0048] Furthermore, refer to Figures 2-6 As shown, the rotating shaft 7 comprises an integrally formed shaft cylinder 701, a first ring plate 702 and a second ring plate 704 fixed at both ends of the shaft cylinder 701, and main supports 703 and auxiliary supports 705 at both ends. The first ring plate 702 and the main supports 703 are fixed at one end of the shaft cylinder 701, and the main supports 703 are used for connecting... Figure 7 The magnetic levitation bearing 11, positioned on the left side of the view, has its pressure surface 10 provided by the first ring plate 702. The second ring plate 704 is connected to the other end of the shaft cylinder 701 via a secondary bracket 705. The secondary bracket 705 also has a shaft 706 for fixing the impeller 3. Specifically, the impeller 3 and the shaft 706 can be integrally formed. The first abutting magnet 12 is fixed to the second ring plate 704, which also serves to... Figure 7 The magnetic levitation bearing 11 on the right side of the view is connected through the sub-support 705, so that the second ring plate 704 and the circumference of the shaft cylinder 701 are open, which is conducive to the airflow; in addition, the shaft cylinder 701 has a hollow structure inside, which can also be used for airflow, while helping to reduce the overall weight of the rotor, thus helping to deflect when subjected to the intake thrust.

[0049] like Figure 8 As shown in the figure, the airflow passes through the motor in a general way as indicated by the arrow in the figure. After entering from the air inlet 5, the airflow impacts the pressure surface 10 and forms a dissipation. Then, it flows to the right side of the view through the gaps between the stator windings 9, the gaps between the stator windings 9 and the permanent magnet 8, and the inside of the shaft cylinder 701, thereby reaching the air chamber 1. This process effectively achieves sufficient heat dissipation for all parts of the motor.

[0050] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0051] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A sealed magnetic levitation blower, characterized by: The utility model relates to a kind of air flow guiding channel, air flow is in the air flow guiding channel, the air flow guiding channel includes the motor arrangement area and the wind chamber communicated with each other; Arranged in the air flow guiding channel and with it to the rotor and impeller distributed in sequence, the rotor is located in motor arrangement area, and the impeller is located in wind chamber; Wherein; The suction end of the impeller is towards the rotor, the suction end of the impeller is towards the motor arrangement area, air flow exerts propulsive force to the rotor in the process of entering the air flow guiding channel, and the rotor forms axial suspension in the air flow guiding channel by propulsive force; The motor arrangement area has air inlet on it, the rotor has first end and second end along its axial direction, the first end forms clearance contact with the inner wall of motor arrangement area, air flow enters the motor arrangement area from the air inlet, and forms air thrust to the second end; The inner wall of the motor arrangement area and the second end are both configured with magnetic force, and the magnetic force at two places keeps repulsion; The first end is configured with pressure surface, the pressure surface is planar structure, and air flow from the air inlet acts on the pressure surface; The motor arrangement area is fixedly provided with abutting end, and the pressure surface keeps active contact with the abutting end in the process of not being subjected to air thrust. The motor arrangement area and the second end are both provided with magnet, and the magnet between two places is opposite in the same level.

2. The sealed magnetic levitation blower of claim 1, wherein: The rotor is configured with through area along its axial direction, and air flow passes through the through area.

3. The sealed magnetic levitation blower of claim 1, wherein: The pressure surface is annular, and keeps coaxial with the rotor, the air inlet is multiple, and evenly distributed along the circumferential direction of the pressure surface.

4. The sealed magnetic levitation blower of claim 1, wherein: The pressure surface and the abutting end are in spherical contact.

5. The sealed magnetic levitation blower of claim 1, wherein: ​

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