Rotor structure for air suspension centrifugal blower

Abstract

The utility model relates to a rotor structure for an air suspension centrifugal blower, and belongs to the technical field of rotor structures. The motor rotor comprises a permanent magnet core body, sheaths, pull rods, plugs, thrust discs and shaft heads, the plugs are arranged at the two ends of the permanent magnet core body, the sheaths sleeve the permanent magnet core body and the sheaths, protrusions are arranged at the outer ends of the plugs, and one ends of the two pull rods penetrate through the protrusions of the plugs and are in threaded connection with the plugs; the other end of one pull rod sequentially penetrates through the main impeller, the thrust disc and the shaft head from outside to inside, and the other end of the other pull rod sequentially penetrates through the cooling impeller and the shaft head from outside to inside; the shaft head is arranged outside the protrusion of the plug in a sleeved mode, and a drainage impeller is further arranged between the shaft head close to the main impeller and the plug. By arranging the drainage impeller, airflow is effectively guided, the path of the air channel is optimized, the speed and the flow of the airflow in the heat dissipation air channel are increased, and the overall heat dissipation efficiency of the air blower is enhanced.

Description

Technical Field

[0001] The utility model relates to a rotor structure used for an air suspension centrifugal blower, belonging to the technical field of rotor structures. Background Art

[0002] At present, the rotor structure of air suspension centrifugal blowers mostly adopts split assembly, separating the tie rod from the motor rotor. This design can reduce the length of the rotor and facilitate processing. However, the existing tie rod rotor also has some problems. On the one hand, due to the unreasonable design of the internal air duct of the air suspension centrifugal blower, there is a problem of poor heat dissipation, which easily leads to excessive rotor temperature; on the other hand, because the tie rod and the middle part of the rotor are connected by threads, the concentricity of the middle part of the rotor and the tie rods at both ends will not meet the requirements, which will cause wear of the rotor and affect the service life of the rotor. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a rotor structure for an air suspension centrifugal blower. An induced draft impeller is arranged on the rotor structure. This structure can more effectively guide the airflow, increase the speed and flow rate of the air flow inside the heat dissipation duct in the air suspension centrifugal blower, and enhance the overall heat dissipation efficiency of the air suspension centrifugal blower.

[0004] The technical solution of the utility model is:

[0005] A rotor structure for an air suspension centrifugal blower, comprising a motor rotor, a main impeller and a cooling impeller arranged at both ends of the motor rotor;

[0006] The motor rotor includes a permanent magnet core, a sheath, a pull rod, a plug, a thrust plate and a shaft head. The plugs are arranged at both ends of the permanent magnet core, the sheath is sleeved on the outside of the permanent magnet core and the sheath, a protrusion is arranged on the outer end of the plug, and the shaft head is sleeved on the outside of the protrusion; the motor rotor is provided with two pull rods, one end of each of the two pull rods is inserted into the inside of the protrusion and is threadedly connected with the plug; the other end of one pull rod passes through the main impeller, the thrust plate and the shaft head from the outside to the inside in sequence, and the other end of the other pull rod passes through the cooling impeller and the shaft head from the outside to the inside in sequence;

[0007] In addition, a drainage impeller is arranged between the shaft head close to the main impeller and the plug to adjust the speed and flow rate of the cooling air flowing through the motor rotor.

[0008] Preferably, according to the utility model, the drainage impeller is sleeved on the outside of the protrusion, and two end faces of the drainage impeller are respectively in contact with the shaft head and the plug.

[0009] Preferably, according to the utility model, the drainage impeller includes a back plate and blades arranged on the back plate, the blades face the shaft head, and the back plate faces the plug.

[0010] Preferably, according to the present invention, the inner diameter of the blade is greater than or equal to the outer diameter of the shaft head.

[0011] Preferably, according to the present invention, the outer diameter of the blade is less than or equal to the outer diameter of the sheath.

[0012] Preferably, according to the present invention, a drainage impeller is also arranged between the shaft head and the plug near the cooling impeller end, and the two drainage impellers are symmetrically arranged between the corresponding plug and the shaft head.

[0013] According to the preferred embodiment of the utility model, the pull rod includes a front threaded portion, a back cutter groove, a limiting portion and a connecting portion which are connected in sequence, and a positioning portion is further provided between the back cutter groove and the limiting portion, and the back cutter groove, the positioning portion and the limiting portion are in a stepped structure with increasing diameter from the outside to the inside;

[0014] An internal thread hole is provided in the plug, and a positioning hole is provided at the edge of the internal thread hole, wherein the diameter of the positioning hole is larger than the diameter of the internal thread hole;

[0015] The front threaded portion is threadedly connected with the internal threaded hole, the positioning portion is matched with the positioning hole, and the limiting portion is abutted against the top of the protrusion.

[0016] According to the preferred embodiment of the utility model, a boss is provided at one end of the shaft head away from the plug, one end of the cooling impeller is sleeved on the outside of the boss on the corresponding shaft head, and the cooling impeller abuts against the outer end surface of the corresponding shaft head;

[0017] One end of the main impeller is sleeved on the outside of the boss on the corresponding shaft head, a groove is formed between the cooling impeller and the corresponding shaft head, and the thrust plate is sleeved in the groove.

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a permanent magnet rotor structure for an air suspension centrifugal blower, which is a pull rod type rotor structure. By arranging a flow guide impeller on the rotor structure, the airflow can be more effectively guided, the air duct path can be optimized, the vortex and pressure loss of the airflow can be reduced, the speed and flow of the airflow inside the heat dissipation duct can be increased, and the overall heat dissipation efficiency of the blower can be enhanced. In addition, a positioning part is also arranged between the backing groove and the limiting part, which can limit the position of the pull rod from the axial and radial angles of the rotor, and improve the concentricity of the permanent magnet core and the pull rods at both ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model provides a schematic structural diagram of a rotor structure for an air suspension centrifugal blower.

[0021] Figure 2 It is a structural schematic diagram of the drainage impeller provided by the utility model.

[0022] Figure 3 It is a structural schematic diagram of another rotor structure for an air suspension centrifugal blower provided by the utility model.

[0023] Figure 4 The utility model provides Figure 1 Enlarged schematic diagram of position A in the middle.

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the pull rod provided by the utility model.

[0025] Figure 6 It is a structural schematic diagram of the plug provided by the utility model.

[0026] 1. Permanent magnetic core, 2. Sheath, 3. Plug, 4. Shaft head, 5. Pull rod, 6. Main impeller, 7. Cooling impeller, 8. Blades, 9. Drain impeller, 10. Thrust plate, 11. Positioning part, 12. Front threaded part, 13. Limiting part, 14. Backing groove, 15. Positioning hole, 16. Connecting part, 17. Back plate. DETAILED DESCRIPTION

[0027] Several embodiments of the present application will be disclosed below with diagrams to clearly and completely describe the technical solution of the present utility model, which constitute a part of the specification of the present application. The drawings are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions of the present utility model are used to explain the present utility model and do not constitute an improper limitation on the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present utility model.

[0028] It should be noted that unless a direction is defined separately, the directions such as up, down, left, and right mentioned in this document are based on the embodiments of this application. Figure 1 The directions of up, down, left, right, etc. shown in the figure shall prevail. If the specific posture changes, the directional indication will also change accordingly. The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in various embodiments of the present disclosure, the same or similar reference numerals represent the same or similar components.

[0029] In the present invention, unless otherwise specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral body, unless otherwise specified. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Example 1

[0032] The utility model provides a rotor structure for an air suspension centrifugal blower, such as Figure 1 As shown, it includes a motor rotor, a main impeller 6 and a cooling impeller 7 arranged at both ends of the motor rotor,

[0033] The motor rotor includes a permanent magnet core 1, a sheath 2, a pull rod 5, a plug 3, a thrust plate 10 and a shaft head 4.

[0034] The plugs 3 are arranged at both ends of the permanent magnetic core 1, the sheath 2 is sleeved on the outside of the permanent magnetic core 1 and the sheath 2, the two ends of the permanent magnetic core 1 are provided with pull rods 5, the outer end of the plug 3 is provided with a protrusion, and the motor rotor is provided with two pull rods 5, one end of the two pull rods 5 is penetrated inside the protrusion of the plug 3, and is threadedly connected with the plug 3; the other end of one pull rod 5 passes through the main impeller 6, the thrust plate 10, and the shaft head 4 from the outside to the inside, and the other end of the other pull rod 5 passes through the cooling impeller 7 and the shaft head 4 from the outside to the inside;

[0035] The shaft head 4 is sleeved on the protruding outside of the plug 3, and a drainage impeller 9 is also provided between the shaft head 4 and the plug 3 near the main impeller 6 to adjust the speed and flow of the cooling air flowing through the motor rotor. At the same time, the drainage impeller 9 is provided at this position for drainage, which can reduce the temperature of the radial air bearing.

[0036] Example 2

[0037] The utility model provides a rotor structure for an air suspension centrifugal blower, which is different from the embodiment 1 in that: Figure 1 As shown, the drainage impeller 9 is sleeved on the outside of the protrusion, and the two end faces of the drainage impeller 9 are respectively in contact with the shaft head 4 and the plug 3.

[0038] Example 3

[0039] The utility model provides a rotor structure for an air suspension centrifugal blower, which differs from the embodiment 2 in that: Figure 2 As shown, the impeller 9 includes a back plate 17 and blades 8 arranged on the back plate 17, the blades 8 face the shaft head 4, and the back plate 17 faces the plug 3. Such a design facilitates the cooling air of the left air duct of the motor to be guided.

[0040] Example 4

[0041] The utility model provides a rotor structure for an air suspension centrifugal blower, which is different from the embodiment 3 in that: Figure 1 and Figure 2 As shown, the inner diameter of the blade 8 of the impeller 9 is greater than or equal to the outer diameter of the shaft head 4. The shaft head 4 is prevented from squeezing the blade 8.

[0042] Example 5

[0043] The utility model provides a rotor structure for an air suspension centrifugal blower, which is different from the embodiment 3 in that: Figure 1 and Figure 2 As shown, the outer diameter of the blades 8 of the drainage impeller 9 is less than or equal to the outer diameter of the sheath 2. This prevents the drainage impeller 9 from scratching the coil of the motor stator when the rotor rotates.

[0044] Example 6

[0045] The utility model provides a rotor structure for an air suspension centrifugal blower, which is different from any one of embodiments 1 to 5 in that:

[0046] According to the heat dissipation characteristics of the blowers of different powers, such as Figure 3 As shown, a drainage impeller 9 can be optionally provided between the shaft head 4 and the plug 3 near the end of the cooling impeller 7, and two drainage impellers 9 are symmetrically arranged between the corresponding plug 3 and the shaft head 4. The drainage impeller 9 arranged on the right side can also increase the flow rate of the cooling air between the motor rotor and the stator.

[0047] Example 7

[0048] The utility model provides a rotor structure for an air suspension centrifugal blower, which is different from the embodiment 1 in that: Figure 5 and Figure 4 As shown, the pull rod 5 includes a front threaded portion 12, a back cutter groove 14, a limiting portion 13 and a connecting portion 16 connected in sequence, a positioning portion 11 is further provided between the back cutter groove 14 and the limiting portion 13, and the back cutter groove 14, the positioning portion 11 and the limiting portion 13 are in a stepped structure with increasing diameters from the outside to the inside;

[0049] like Figure 4 and Figure 6 As shown, an internal threaded hole is formed in the plug 3, and a positioning hole 15 is formed at the edge of the internal threaded hole. The diameter of the positioning hole 15 is larger than the diameter of the internal threaded hole.

[0050] The front threaded portion 12 is threadedly connected to the internal threaded hole, the positioning portion 11 is matched with the positioning hole 15, and the limiting portion 13 is in contact with the top of the protrusion.

[0051] Since the connection between the front threaded portion 12 and the internal thread of the plug 3 will inevitably cause a certain deviation in the concentricity of the permanent magnetic core 1 and the pull rods 5 at both ends, the concentricity deviation caused by the threaded connection can be compensated by providing the positioning portion 11 and the limiting portion 13.

[0052] Example 8

[0053] The utility model provides a rotor structure for an air suspension centrifugal blower, which is different from the embodiment 1 in that: Figure 1 As shown, a boss is provided at one end of the shaft head 4 away from the plug 3, one end of the cooling impeller 7 is sleeved on the outside of the boss in the corresponding shaft head 4, and the cooling impeller 7 abuts against the outer end surface of the corresponding shaft head 4;

[0054] One end of the main impeller 6 is sleeved on the outside of the boss in the corresponding shaft head 4, a groove is formed between the cooling impeller 7 and the corresponding shaft head 4, and the thrust plate 10 is sleeved in the groove.

[0055] The above description shows and describes the preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the object concept of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A rotor structure for an air suspension centrifugal blower, characterized in that: It includes a motor rotor, a main impeller and a cooling impeller arranged at both ends of the motor rotor. The motor rotor includes a permanent magnetic core, a sleeve, a pull rod, a plug, a thrust plate and a shaft head. The plugs are arranged at both ends of the permanent magnetic core, the sleeve is sleeved on the outside of the permanent magnetic core and the sleeve, a protrusion is arranged on the outer end of the plug, and the shaft head is sleeved on the outside of the protrusion; the motor rotor is provided with two pull rods, one end of the two pull rods are both inserted into the inside of the protrusion and are threadedly connected with the plug; the other end of one pull rod passes through the main impeller, the thrust plate and the shaft head from the outside to the inside in sequence, and the other end of the other pull rod passes through the cooling impeller and the shaft head from the outside to the inside in sequence; and a drainage impeller is also arranged between the shaft head and the plug close to the main impeller, which is used to adjust the speed and flow of the cooling air flowing through the motor rotor.

2. A rotor structure for an air suspension centrifugal blower according to claim 1, characterized in that: The drainage impeller is sleeved on the outside of the protrusion, and two end faces of the drainage impeller are respectively in contact with the shaft head and the plug.

3. A rotor structure for an air suspension centrifugal blower according to claim 2, characterized in that: The drainage impeller comprises a back plate and blades arranged on the back plate, the blades face the shaft head, and the back plate faces the plug.

4. A rotor structure for an air suspension centrifugal blower according to claim 3, characterized in that: The inner diameter of the blade is greater than or equal to the outer diameter of the shaft head.

5. A rotor structure for an air suspension centrifugal blower according to claim 4, characterized in that: The outer diameter of the blade is less than or equal to the outer diameter of the sheath.

6. A rotor structure for an air suspension centrifugal blower according to any one of claims 1 to 5, characterized in that: A drainage impeller is also arranged between the shaft head and the plug near the cooling impeller end, and the two drainage impellers are symmetrically arranged between the corresponding plug and the shaft head.

7. The rotor structure for an air suspension centrifugal blower according to claim 1, characterized in that: The pull rod includes a front threaded portion, a tool withdrawal groove, a limiting portion and a connecting portion which are connected in sequence. A positioning portion is also arranged between the tool withdrawal groove and the limiting portion. The tool withdrawal groove, the positioning portion and the limiting portion present a stepped structure with increasing diameters from the outside to the inside. An internal threaded hole is provided in the plug, and a positioning hole is provided at the edge of the internal threaded hole. The diameter of the positioning hole is larger than that of the internal threaded hole. The front threaded portion is threadedly connected to the internal threaded hole, the positioning portion cooperates with the positioning hole, and the limiting portion abuts against the top of the protrusion.

8. The rotor structure for an air suspension centrifugal blower according to claim 7, characterized in that: A boss is provided at the end of the shaft head away from the plug, one end of the cooling impeller is sleeved on the outside of the boss on the corresponding shaft head, and the cooling impeller abuts against the outer end surface of the corresponding shaft head; one end of the main impeller is sleeved on the outside of the boss on the corresponding shaft head, a groove is formed between the cooling impeller and the corresponding shaft head, and the thrust plate is sleeved in the groove.

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