Sealed magnetic suspension blower

Abstract

The invention relates to a sealed magnetic suspension blower which comprises a motor part, an air chamber, an impeller and the like, a motor is directly communicated with the air chamber, air is sucked from the motor when the impeller works, and a motor shell is in sealed connection with the air chamber. Compared with a traditional magnetic suspension air blower structure, an air inlet is removed, air is fed only from the position where the motor is located, and therefore the phenomenon that air leakage is prone to occurring in the traditional structure is effectively improved, and meanwhile the magnetic suspension air blower is good in heat dissipation performance, long in service life, simple in structure, low in manufacturing cost and suitable for popularization and application. Therefore, the device can be greatly popularized in the market.

Description

Technical Field

[0001] The present invention relates to gas distribution equipment, and more particularly to a sealed magnetic levitation blower. Background Art

[0002] The magnetic levitation blower relies on the cooperation between magnetic levitation bearings and magnets, enabling the internal rotor of the motor to form suspension in the circumferential and axial directions respectively, making the rotor and stator non-contact. The impeller is fixedly connected to the rotor, thus achieving the suspension effect together.

[0003] With the development of technology, the application range of the blower has evolved from initially transporting harmless gases or performing indoor and outdoor air conditioning to transporting chemical substances. Many chemical substances, such as acetylene, are flammable, explosive, and toxic. Once leaked, they will cause serious accidents. Therefore, the shaft seal structure of the blower needs to have good sealing performance. In the current technology, in order to maintain the suspension effect of the rotor, there is no good contact between the rotor of the blower and the shell wall of the air chamber, resulting in a certain gap between them. As a result, the gas in the air chamber is easily squeezed into the motor along the gap and leaks through the heat dissipation holes of the motor. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

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

[0006] A sealed magnetic levitation blower, comprising:

[0007] A flow guiding channel through which air flows;

[0008] Arranged in the flow guiding channel and leading to the rotor and impeller distributed in sequence;

[0009] Wherein, the suction end of the impeller faces the rotor, and the air flow applies a driving force to the rotor during the process of entering the flow guiding channel, and the rotor forms axial suspension in the flow guiding channel through the driving force.

[0010] As a preferred technical solution of a sealed magnetic levitation blower, the flow guiding channel includes a motor arrangement area and an air chamber that are communicated. The rotor is located in the motor arrangement area, and the impeller is located in the air chamber, and its suction end faces the motor arrangement area.

[0011] As a preferred technical solution of a sealed magnetic levitation blower, an air inlet end is provided on the motor arrangement area. The rotor has opposite first and second ends along its axial direction. The first end forms a non-contact repulsive force with the inner wall of the motor arrangement area, and air flow enters the motor arrangement area from the air inlet end and forms an air thrust on the second end.

[0012] As a preferred technical solution of a sealed magnetic levitation blower, magnetic forces are configured on both the inner wall of the motor arrangement area and the second end, and the two magnetic forces are kept mutually repulsive.

[0013] As a preferred technical solution of a sealed magnetic levitation blower, a pressure-receiving surface is configured on the first end. The pressure-receiving surface is of a planar structure, and the air flow from the air inlet end acts on the pressure-receiving surface.

[0014] As a preferred technical solution of a sealed magnetic levitation blower, magnets are provided on both the motor arrangement area and the second end, and the same poles of the two magnets face each other.

[0015] As a preferred technical solution of a sealed magnetic levitation blower, a through area is constructed along the axial direction of the rotor, and the air flow passes through the through area.

[0016] As a preferred technical solution of a sealed magnetic levitation blower, a contact end is fixedly provided on the motor arrangement area, and the pressure-receiving surface is in movable contact with the contact end during the process of not receiving the air thrust.

[0017] As a preferred technical solution of a sealed magnetic levitation blower, the pressure-receiving surface is annular and coaxial with the rotor. There are multiple air inlet ends, which are evenly distributed along the circumferential direction of the pressure-receiving surface.

[0018] As a preferred technical solution of a sealed magnetic levitation blower, the contact between the pressure-receiving surface and the contact end is a spherical contact.

[0019] The sealed magnetic levitation blower provided by the present invention has the following beneficial effects:

[0020] 1. Compared with the structure of the traditional magnetic levitation blower, the present invention removes the air inlet, and only the place where the motor is located intakes air, thereby effectively improving the phenomenon of air leakage prone to occur in the traditional structure.

[0021] 2. When the present invention is working, during the process of the air flow traveling in the structure, it directly passes through the inside of the motor, thereby directly playing a role in dissipating heat from the motor.

[0022] 3. When the rotor in the present invention is levitating, its axial levitation is directly maintained by the air thrust during air intake, thereby reducing the arrangement of excessive magnets, making the product structure of the present invention simpler and lighter, with a lower manufacturing cost, and thus being able to be better promoted in large quantities in the market. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

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

[0025] Figure 2 is Figure 1 an internal sectional view of the structure shown.

[0026] Figure 3 is Figure 2 another perspective view of

[0027] Figure 4 is Figure 2 a view showing a partial structure of separately.

[0028] Figure 5 is is Figure 4 another perspective view of

[0029] Figure 6 is Figure 4 a disassembled view of the structure shown.

[0030] Figure 7 is Figure 1 a schematic diagram of the positional arrangement between components in the embodiment.

[0031] Figure 8 is Figure 1 a working schematic diagram of the embodiment.

[0032] Reference Signs:

[0033] 1, air chamber; 2, motor housing; 3, impeller; 4, air outlet; 5, intake end; 6, abutting end; 7, rotating shaft; 701, shaft cylinder; 702, first ring plate; 703, main bracket; 704, second ring plate; 705, sub-bracket; 706, axis center; 8, permanent magnet; 9, stator winding; 10, pressing surface; 11, magnetic suspension bearing; 12, first abutting magnet; 13, second abutting magnet. Detailed Embodiments

[0034] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be made in conjunction with the drawings in the specification.

[0035] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those specifically described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0036] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other with other embodiments.

[0037] Thirdly, the present invention is described in detail in conjunction with schematic diagrams. When detailing the embodiments of the present invention, for the sake of illustration, the cross-sectional views showing the device structure are enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0038] For the traditional magnetic levitation blower structure, a separate outward air inlet is configured on the air chamber, the motor is arranged on the other side of the air chamber, opposite to 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 this end, with the suction end of the impeller facing 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 through the shell wall of the air chamber and then dissipate outward through the motor heat dissipation holes; thus, it can be seen that it has limitations; in view of this:

[0039] Refer to Figure 1-8 , an embodiment of the present invention will provide a sealed magnetic levitation blower, including a fixedly connected air chamber 1 and a motor housing 2. Only an air outlet 4 is provided on the air chamber 1, and the traditional separate air inlet is removed. One side of the air chamber 1 forms a connection with the motor housing 2;

[0040] Regarding the motor, it is a brushless motor. Specifically, its stator winding 9 is fixed on the inner wall of the motor housing 2. The rotor is composed of a rotating shaft 7 and a permanent magnet 8 fixedly arranged on the rotating shaft 7. An impeller 3 located in the air chamber 1 is fixedly connected to the rotating shaft 7. The rotating shaft 7 is connected to the inner wall of the motor housing 2 through a magnetic levitation bearing 11. The magnetic levitation bearing 11 is used to provide circumferential magnetic levitation support for the rotating shaft 7 during operation. As shown in the perspective view of Figure 7 , a first repelling magnet 12 is fixed to one end on the right side of the rotating shaft 7, and a second repelling magnet 13 is fixed to the motor housing 2. The first repelling magnet 12 and the second repelling magnet 13 are opposite in the same pole, thus forming a repelling effect;

[0041] As shown in Figure 7As shown in the middle perspective, the left end of the shaft 7 is constructed with an annular pressure surface 10, and the motor housing 2 is constructed with multiple pipe-shaped air inlet ends 5. The motor is also fixed with a resistance end 6, whose end head is a universal ball structure and resists on the pressure surface 10 to cooperate with the repulsive force at the other end of the shaft 7, so that the entire rotor is restricted to a specific area in the axial direction. When the entire fan is not working, the state of the rotor is as follows Figure 7 As shown, at this time, due to the existence of repulsive force, the rotor is forced to the left as a whole, so that the pressure surface 10 contacts the interference end 6, and the air inlet end 5 and the pressure surface 10 are sufficiently close to each other, but not in contact, so that the pressure surface 10 forms a state close to blocking the air inlet end 5, and at this time a certain gap is formed between the first interference magnet 12 and the second interference magnet 13;

[0042] Based on this, the present invention is different from the existing one in that the interior of the motor is communicated with the air chamber 1, and the only part of the motor that is communicated with the outside is the air inlet end 5 located on the motor housing 2 and the air outlet 4 located on the air chamber 1. The air suction end of the impeller 3 is directly facing the inside of the motor.

[0043] When the fan is working as a whole, the internal state is as follows: Figure 8 As shown, as the rotor rotates at high speed, the impeller 3 works, so that the air inside the wind chamber 1 is pushed to the outside of the air outlet 4, and low pressure is formed in the wind chamber 1 and the motor housing 2. The external air enters the motor housing 2 through the air inlet end 5 and finally reaches the wind chamber 1, thereby forming a cycle, so that the whole forms an air supply system that takes in air from the air inlet end 5 and exhausts air from the air outlet 4. In this process, when the external airflow enters the air inlet end 5 and flows into the motor housing 2, the airflow pushes the pressure surface 10, thereby forming a direction for the rotor. Figure 8 The force applied on the right side of the viewing angle causes the rotor as a whole to slightly deflect to the right, thereby separating from the abutting end 6. Due to the repulsive force, the rotor cannot deflect to the right to the end, that is, this state will compress the gap between the first abutting magnet 12 and the second abutting magnet 13. The ultimate effect achieved is that, in this state, the entire rotor will also achieve a suspension effect in the axial direction, so as to cooperate with the circumferential suspension and make the entire rotor completely suspended in the motor housing 2; multiple air inlet ends 5 are evenly distributed at various locations on the pressure surface 10 along the circumferential direction of the pressure surface 10, so that the generated gas thrust is applied to various locations on the pressure surface 10, thereby helping to balance the force on the entire rotor and making its suspension more stable;

[0044] Compared with the existing equipment, the present invention has the following technical effects:

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

[0046] In the present invention, the axial suspension effect of the rotor part is achieved by taking advantage of the pressure during air intake, thereby reducing the arrangement of excessive magnets, further controlling the manufacturing cost, and also reducing the quality of the product.

[0047] When the present invention is working, 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 provide a separate heat dissipation structure, further controlling the manufacturing cost.

[0048] Further, refer to Figure 2-6 As shown, the rotating shaft 7 includes an integral shaft cylinder 701, a first ring plate 702 and a second ring plate 704 fixed at both ends of the shaft cylinder 701, and a main bracket 703 and a sub-bracket 705 at both ends. The first ring plate 702 and the main bracket 703 are fixed at one end of the shaft cylinder 701, and the main bracket 703 is used to connect Figure 7 The magnetic bearing 11 on the left side of the viewing angle has a pressure surface 10 provided by a first ring plate 702; the second ring plate 704 is connected to the other end of the shaft cylinder 701 through a sub-bracket 705, and the sub-bracket 705 is also constructed with an axis 706, which is used to fix the impeller 3. Specifically, the impeller 3 and the axis 706 can also be integrally formed. The first contact magnet 12 is fixed on the second ring plate 704, and the second ring plate 704 is also responsible for contacting the impeller 3. Figure 7 The magnetic bearing 11 on the right side of the viewing angle is connected to the secondary bracket 705, so that an open space is formed between the second ring plate 704 and the peripheral side of the shaft cylinder 701, thereby facilitating airflow. In addition, the interior of the shaft cylinder 701 is a hollow structure, which can also be used for airflow and helps to reduce the overall weight of the rotor, thereby facilitating deflection when subjected to inlet thrust.

[0049] like Figure 8 As shown, the passage of the airflow inside the motor is roughly as shown by the arrows in the figure. After entering from the air inlet end 5, the airflow impacts the pressure surface 10 and escapes. Then, it flows to the right side of the viewing angle through the gaps between the stator windings 9, the gaps between the stator windings 9 and the permanent magnets 8, and the inside of the shaft tube 701, thereby reaching the wind chamber 1. This process effectively achieves sufficient heat dissipation in various places inside the motor.

[0050] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A sealed magnetic levitation blower, characterized in that: Comprising: A diversion channel through which the air flow passes; Arranged in the diversion channel and following it to the sequentially distributed rotor and impeller; Wherein, the suction end of the impeller faces the rotor, and during the process of the air flow entering the diversion channel, a driving force is applied to the rotor, and the rotor forms an axial suspension in the diversion channel through the driving force.

2. The sealed magnetic levitation blower according to claim 1, wherein: The diversion channel includes a motor arrangement area and a wind chamber that communicate with each other. The rotor is located in the motor arrangement area, and the impeller is located in the wind chamber, and its suction end faces the motor arrangement area.

3. The sealed magnetic levitation blower according to claim 2, wherein: The motor arrangement area has an air inlet end. The rotor has a first end and a second end opposite to each other along its axial direction. The first end forms a non-contact repulsive force with the inner wall of the motor arrangement area. The air flow enters the motor arrangement area from the air inlet end and forms an air thrust on the second end.

4. The sealed magnetic levitation blower according to claim 3, wherein: Magnets are arranged on both the inner wall of the motor arrangement area and the second end, and the two magnets maintain mutual repulsion.

5. The sealed magnetic levitation blower according to claim 3, characterized in that: A pressure-receiving surface is arranged on the first end, and the pressure-receiving surface is of a flat structure, and the air flow from the air inlet end acts on the pressure-receiving surface.

6. The sealed magnetic levitation blower according to claim 4, characterized in that: Magnets are arranged on both the motor arrangement area and the second end, and the same poles of the two magnets face each other.

7. The sealed magnetic levitation blower according to claim 1, characterized in that: The rotor is axially provided with a through area through which the air flow passes.

8. The sealed magnetic levitation blower according to claim 5, characterized in that: The motor arrangement area is fixedly provided with a contact end, and the pressure-receiving surface is in movable contact with the contact end when not receiving the air thrust.

9. The sealed magnetic levitation blower according to claim 5, wherein: The pressure-receiving surface is annular and coaxial with the rotor. The air inlet ends are multiple and are evenly distributed along the circumferential direction of the pressure-receiving surface.

10. The sealed magnetic levitation blower according to claim 8, characterized in that: The contact between the pressure-receiving surface and the contact end is spherical.

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