Impeller locking structure and magnetic suspension air compressor impeller rotor

Abstract

The utility model provides an impeller locking structure and a magnetic suspension air compressor impeller rotor, relates to the technical field of compressors, and solves the technical problems that an impeller locking structure is complicated and a connecting structure between an impeller and a rotor shaft is unstable in the prior art. The impeller locking structure and the magnetic suspension air compressor impeller rotor comprise a locking screw rod, wherein the first end of the locking screw rod is connected with a rotor shaft; the impeller is arranged on the locking screw rod in a sleeving manner and is connected with the rotor shaft; the first fixing piece is in threaded connection with the second end of the locking screw rod, and a linkage structure is arranged between the impeller and the first fixing piece; and the second fixing piece is in threaded connection with the second end of the locking screw rod and is used for locking the first fixing piece and the impeller. According to the impeller locking structure and the impeller rotor of the magnetic suspension air compressor, the structure is simple, and connection between the impeller and the rotor shaft is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an impeller locking structure and an impeller rotor of a magnetic suspension air compressor. Background Art

[0002] In the field of industrial applications, energy conservation and emission reduction have become the guiding direction of my country's industrial development. The power consumption of the compressor air system accounts for 10%-25% of the electricity consumption of enterprises. It is very meaningful to improve the energy efficiency of air compressor products. In recent years, the overall development trend of the air compressor industry has gradually developed in the direction of "oil-free, high-efficiency, and maintenance-free". Since the exhaust air of oil-free compressors does not contain oil, its growth trend in pharmaceuticals, medical treatment, and food has been significant in recent years, and the annual growth rate of oil-free screws is about 20%. Energy efficiency improvement and oil-free in the air compressor market will become the main competitive points of the industry, and magnetic levitation technology has the inherent advantage of oil-free.

[0003] Magnetic levitation air compressors generally have a two-stage compression structure, with impellers installed at both ends of the rotor. The rated exhaust pressure is achieved after two-stage compression of the air. The rotor speed of the magnetic levitation air compressor is relatively high, generally above 30,000 RPM, and the accuracy requirements for the entire shaft are high during operation. Therefore, the installation of the impellers at both ends is particularly important during the assembly of the entire machine.

[0004] The current mainstream locking method mainly relies on a hydraulic pump to stretch the tie rod to lock the impeller on the shaft, or uses a nut to lock the impeller. The above two methods each have their advantages and disadvantages. The tie rod locking method uses hydraulic tooling and hydraulic pumps, which are complex and require high material strength; the nut locking method has a simple structure, but the connection structure between the impeller and the rotor shaft cannot guarantee stable torque transmission and reliable locking. Utility Model Content

[0005] The purpose of the utility model is to provide an impeller locking structure and a magnetic suspension air compressor impeller rotor to solve the technical problems of the complicated impeller locking structure and the unstable connection structure between the impeller and the rotor shaft in the prior art. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The impeller locking structure provided by the utility model comprises:

[0008] A locking screw, wherein a first end of the locking screw is connected to the rotor shaft;

[0009] An impeller, the impeller is sleeved on the locking screw and connected to the rotor shaft;

[0010] a first fixing member, wherein the first fixing member is threadedly connected to the second end of the locking screw, and a linkage structure is provided between the impeller and the first fixing member;

[0011] A second fixing member is threadedly connected to the second end of the locking screw to lock the first fixing member and the impeller.

[0012] As a further improvement of the present utility model, the linkage structure includes a positioning member and a positioning hole provided on the first fixing member, and the positioning member passes through the positioning hole and is connected to the impeller.

[0013] As a further improvement of the utility model, the positioning member is a bolt, a threaded hole is provided on the impeller, and the bolt passes through the positioning hole and is threadedly connected to the threaded hole.

[0014] As a further improvement of the utility model, the linkage structure includes a fixing ring, a countersunk hole is provided on the impeller, the fixing ring is arranged between the first fixing piece and the countersunk hole, the shape of the countersunk hole is adapted to the outer wall of the fixing ring, and the inner wall of the fixing ring is adapted to the first fixing piece.

[0015] As a further improvement of the present invention, the sink hole is a hexagonal structural hole, a quadrilateral structural hole, a triangular structural hole or other special-shaped structural holes.

[0016] As a further improvement of the present invention, a centering structure is provided between the rotor shaft and the locking screw, and the centering structure includes a conical groove provided on the rotor shaft and a conical protrusion provided on the locking screw, and the conical protrusion cooperates with the conical groove.

[0017] As a further improvement of the present invention, a threaded hole is provided in the rotor shaft, an external thread is provided at the first end of the locking screw, and the first end of the locking screw is threadedly connected to the threaded hole; a conical groove is provided at the end of the threaded hole, and a conical protrusion is correspondingly provided on the locking screw.

[0018] As a further improvement of the present invention, the rotor shaft is threadedly connected to the locking screw, and the tightening direction of the rotor shaft and the locking screw is opposite to the rotation direction of the impeller.

[0019] As a further improvement of the present invention, the rotor shaft is connected to the locking screw via a fine pitch thread.

[0020] As a further improvement of the present invention, the second end portion of the locking screw is provided with an external hexagonal structure.

[0021] A magnetically suspended air compressor impeller rotor comprises the impeller locking structure as described above.

[0022] The beneficial effects of the utility model are as follows: the impeller locking structure and the magnetic levitation air compressor impeller rotor provided by the utility model include a locking screw, an impeller, a first fixing piece and a second fixing piece. The first fixing piece and the second fixing piece are both threadedly connected to the locking screw to position the impeller on the locking screw. A double locking method of the first fixing piece and the second fixing piece is adopted to improve the connection effect between the impeller and the rotor shaft.

[0023] Secondly, by arranging a linkage structure between the impeller and the first fixing part, the first fixing part locks the impeller on the locking screw, and the position of the first fixing part and the impeller is limited by the linkage structure. Since the impeller transmits torque to the rotor shaft through the flat key during assembly, after adopting the linkage structure between the first fixing part and the impeller, the locking effect between the impeller and the rotor shaft can be enhanced under the double locking of the key connection and the first fixing part, ensuring that the connection structure between the impeller and the rotor shaft is more stable; since the position of the impeller and the first fixing part is fixed, single-sided locking can be achieved when locked by the second fixing part.

[0024] In addition, the impeller locking structure has a simple structure, the connection structure between the impeller and the rotor shaft is more stable, and no hydraulic tooling and hydraulic pump are required, making it easier and safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a three-dimensional diagram (I) of the utility model;

[0027] Figure 2 It is a three-dimensional diagram (two) of the utility model;

[0028] Figure 3 It is a cross-sectional view of the utility model;

[0029] Figure 4 It is a schematic diagram of the partial structure of A of the utility model;

[0030] Figure 5 It is a schematic diagram of the partial structure of B of the utility model;

[0031] Figure 6 It is a structural schematic diagram of the first fixing member of the utility model;

[0032] Figure 7 It is a structural schematic diagram of the fixing ring of the utility model.

[0033] In the figure:

[0034] 1. Rotor shaft; 2. Locking screw; 3. Impeller; 4. First fixing member; 5. Second fixing member; 6. Linkage structure; 7. Positioning member; 8. Threaded hole; 9. Countersunk hole; 10. Fixing ring; 11. Conical groove; 12. Conical protrusion; 13. Positioning hole; 14. Flat key;

[0035] 21. Primary locking screw; 22. Secondary locking screw; 31. Primary impeller; 32. Secondary impeller; 41. Primary first fixing member; 42. Secondary first fixing member; 51. Primary second fixing member; 52. Secondary second fixing member; 61. Primary linkage structure; 62. Secondary linkage structure; 111. Primary conical groove; 112. Secondary conical groove; 121. Primary conical protrusion; 122. Secondary conical protrusion. DETAILED DESCRIPTION

[0036] Please refer to the attached figure below Figure 1 to Figure 7 And the text content understands the content of the utility model and the difference between the utility model and the prior art. The following is a further detailed description of the technical solution (including the preferred technical solution) of the utility model by means of the accompanying drawings and the enumeration of some optional embodiments of the utility model. It should be noted that: any technical feature and any technical solution in the present embodiment are one or more of a variety of optional technical features or optional technical solutions. In order to describe the need for brevity, it is impossible to exhaustively list all the alternative technical features and alternative technical solutions of the utility model in this document, and it is not convenient for the implementation of each technical feature to emphasize that it is one of the optional multiple implementations, so those skilled in the art should know that: any technical means provided by the utility model can be replaced or any two or more technical means or technical features provided by the utility model can be combined with each other to obtain a new technical solution. Any technical feature and any technical solution in this embodiment do not limit the scope of protection of the utility model. The scope of protection of the utility model should include any alternative technical solutions that can be thought of by those skilled in the art without creative labor and new technical solutions obtained by combining any two or more technical means or technical features provided by the utility model.

[0037] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] The utility model provides an impeller locking structure and a magnetic suspension air compressor impeller rotor which have a simple structure and are more stably connected to the impeller and the rotor shaft.

[0040] Combine the following Figure 1 to Figure 7 The technical solution provided by the utility model is described in more detail.

[0041] The utility model provides an impeller locking structure, comprising:

[0042] A locking screw 2, wherein a first end of the locking screw 2 is connected to the rotor shaft 1;

[0043] An impeller 3, wherein the impeller 3 is mounted on the locking screw 2 and is key-connected to the rotor shaft 1;

[0044] a first fixing member 4, wherein the first fixing member 4 is threadedly connected to the second end of the locking screw 2, and a linkage structure 6 is provided between the impeller 3 and the first fixing member 4;

[0045] The second fixing member 5 is threadedly connected to the second end of the locking screw 2 to lock the first fixing member 4 and the impeller 3.

[0046] The impeller locking structure of the magnetic levitation air compressor provided by the utility model comprises a locking screw 2, an impeller 3, a first fixing piece 4 and a second fixing piece 5. The first fixing piece 4 and the second fixing piece 5 are both threadedly connected to the locking screw 2 to position the impeller 3 on the locking screw 2. A double locking method of the first fixing piece 4 and the second fixing piece 5 is adopted to improve the connection effect between the impeller 3 and the rotor shaft 1.

[0047] Secondly, by arranging a linkage structure 6 between the impeller 3 and the first fixing part 4, the first fixing part 4 locks the impeller 3 on the locking screw 2, and the position of the first fixing part 4 and the impeller 3 is limited by the linkage structure 6. Since the impeller 3 transmits torque to the rotor shaft 1 through the flat key 14 during assembly, after the linkage structure 6 is adopted between the first fixing part 4 and the impeller 3, the locking effect between the impeller 3 and the rotor shaft 1 can be enhanced under the double locking of the key connection and the first fixing part 4, ensuring that the connection structure between the impeller 3 and the rotor shaft 1 is more stable; since the position of the impeller and the first fixing part 4 is fixed, when locked by the second fixing part 5, unilateral locking can be achieved, thereby solving the technical problem of the inconvenient disassembly of the impeller 3.

[0048] In addition, the impeller locking structure of the magnetic levitation air compressor provided by the utility model is simple in structure, the connection structure between the impeller 3 and the rotor shaft 1 is more stable, and no hydraulic tooling and hydraulic pump are required, so it is easier and safer to use.

[0049] In some embodiments of the utility model, the first fixing member 4 and the second fixing member 5 are both nuts. When the first fixing member 4 is fixed to the position of the impeller 3 through the linkage structure 6, the first fixing member 4 is fixed by a wrench so that the rotor shaft 1 and the impeller 3 are not moved, and then the second fixing member 5 is locked with a torque wrench at an appropriate torque, thereby achieving a unilateral locking effect of the impeller 3.

[0050] In some embodiments of the present invention, the linkage structure 6 includes a positioning member 7 and a positioning hole 13 provided on the first fixing member 4 , and the positioning member 7 passes through the positioning hole 13 to be connected with the impeller 3 .

[0051] In some of the above embodiments, a positioning hole 13 is provided on the first fixing member 4, and the positioning member 7 passes through the positioning hole 13 to be connected with the impeller 3, and the impeller 3 is fixedly connected to the first fixing member 4 through the positioning member 7, thereby achieving position fixation of the first fixing member 4 and the impeller 3, limiting the relative position of the impeller 3 and the first fixing member 4, so as to ensure double locking between the impeller 3 and the rotor shaft 1 by a key connection and a threaded connection of the first fixing member 4, so that the connection structure between the impeller 3 and the rotor shaft 1 is more stable.

[0052] In some specific embodiments of the present utility model, the positioning member 7 is a bolt, a threaded hole 8 is provided on the impeller 3 , and the bolt passes through the positioning hole 13 and is threadedly connected to the threaded hole 8 .

[0053] In some of the above embodiments, the positioning member 7 is a bolt, a threaded hole 8 is provided on the impeller 3, the bolt passes through the positioning block and is threadedly connected to the threaded hole 8, and the impeller 3 and the first fixing member 4 are fixed by the cooperation of the bolt and the threaded hole 8. The structure is simple and the processing is convenient, and it is suitable for use when the end size of the impeller 3 is larger.

[0054] In some specific embodiments of the present invention, the size of the positioning hole 13 is consistent with the size of the positioning member 7 .

[0055] In some of the above specific embodiments, the positioning hole 13 is consistent in size with the positioning member 7, which can ensure a more stable connection between the positioning member 7 and the impeller 3. The disadvantage is that the precision requirements for the threaded hole 8 and the positioning hole 13 on the impeller 3 are higher.

[0056] Therefore, in some specific embodiments of the present invention, the positioning hole 13 is set as an arc-shaped hole. The connection between the positioning member 7 and the threaded hole 8 is realized through the arc-shaped hole, which effectively ensures the fixing effect of the positioning member 7 and the impeller 3, and is more convenient during installation. When the connection between the first fixing member 4 and the impeller 3 meets the pre-tightening force condition when the positioning member 7 is installed, the positioning member 7 can be connected to the impeller 3.

[0057] In some embodiments of the utility model, the linkage structure 6 includes a fixing ring 10, and a countersunk hole 9 is provided on the impeller 3. The fixing ring 10 is arranged between the first fixing member 4 and the countersunk hole 9. The shape of the countersunk hole 9 is adapted to the outer wall of the fixing ring 10, and the inner wall of the fixing ring 10 is adapted to the first fixing member 4.

[0058] In some of the above-mentioned embodiments, a countersunk hole 9 is provided on the impeller 3, and a fixing ring 10 is provided between the first fixing member 4 and the countersunk hole 9, so that the first fixing member 4 is fixedly connected to the impeller 3, and the relative position of the impeller 3 and the first fixing member 4 is limited, so as to ensure that the impeller 3 and the rotor shaft 1 have double locking of a key connection and a threaded connection of the first fixing member 4, so that the connection structure between the impeller 3 and the rotor shaft 1 is more stable.

[0059] In some specific embodiments of the present invention, the sink hole 9 is a hexagonal structure hole.

[0060] It should be noted here that the inner wall of the fixing ring 10 is adapted to the first fixing piece 4. Since the first fixing piece 4 is usually a hexagonal structure, the inner wall of the fixing ring 10 is set to a hexagonal structure to ensure that the fixing ring 10 can be inserted between the first fixing piece 4 and the impeller 3; the countersunk hole 9 is a hexagonal structural hole, and the outer wall of the fixing ring 10 is also set to a hexagonal structure, which cooperates with the countersunk hole 9, thereby ensuring a fixed connection between the first fixing piece 4 and the impeller 3, limiting the relative position of the impeller 3 and the first fixing piece 4, so as to ensure that the impeller 3 and the rotor shaft 1 have a double locking of a key connection and a threaded connection of the first fixing piece 4, so that the connection structure between the impeller 3 and the rotor shaft 1 is more stable.

[0061] It is understandable that the countersunk hole 9 may also be a quadrilateral structure hole, a triangular structure hole or other special-shaped structure hole. The purpose of the countersunk hole 9 is to cooperate with the fixing ring 10 to limit the relative position of the first fixing member 4 and the impeller 3, so as to ensure that the first fixing member 4 and the impeller 3 can be connected under the double locking of the key connection and the threaded connection of the first fixing member 4.

[0062] In some embodiments of the present invention, a centering structure is provided between the rotor shaft 1 and the locking screw 2, and the centering structure includes a conical groove 11 provided on the rotor shaft 1 and a conical protrusion 12 provided on the locking screw 2, and the conical protrusion 12 cooperates with the conical groove 11.

[0063] In some of the above embodiments, a conical groove 11 and a conical protrusion 12 are provided between the rotor shaft 1 and the locking screw 2 to improve the centering effect and the assembly accuracy of the impeller 3.

[0064] In some embodiments of the present invention, the rotor shaft 1 is threadedly connected to the locking screw 2 , and the tightening direction of the rotor shaft 1 and the locking screw 2 is opposite to the rotation direction of the impeller 3 .

[0065] In some of the above embodiments, the tightening direction of the rotor shaft 1 and the locking screw 2 is opposite to the rotation direction of the impeller 3, so that the inertial force generated by the impeller 3 during the rotation process is continuously applied to the threaded connection between the locking screw 2 and the rotor shaft 1, thereby achieving an anti-loosening effect.

[0066] In some specific embodiments of the present invention, the rotor shaft 1 is connected to the locking screw 2 via a fine thread.

[0067] In the above specific embodiment, the rotor shaft 1 and the locking screw 2 are connected by fine-pitch threads. The combination of reverse threads and fine threads makes the connection between the rotor shaft 1 and the locking screw 2 more stable and has better anti-vibration and anti-loosening effects.

[0068] In some embodiments of the present invention, the second end of the locking screw 2 is provided with an external hexagonal structure.

[0069] In the above embodiment, by providing an external hexagonal structure at the second end of the locking screw 2, the locking screw 2 can be quickly disassembled and installed through the external hexagonal structure during the process of screwing the locking screw 2 in and out, thereby improving the assembly efficiency.

[0070] Embodiment 1:

[0071] The utility model provides a magnetic suspension air compressor impeller rotor, comprising:

[0072] Rotor shaft 1,

[0073] A primary locking screw 21, wherein a first end of the primary locking screw 21 is connected to the rotor shaft 1;

[0074] A first-stage impeller 31, wherein the first-stage impeller 31 is mounted on the first-stage locking screw 21 and connected to the rotor shaft 1 via a flat key 14;

[0075] A first-stage first fixing member 41, wherein the first-stage first fixing member 41 is threadedly connected to the second end of the first-stage locking screw 21, and a first-stage linkage structure 61 is provided between the first-stage impeller 31 and the first-stage first fixing member 41;

[0076] A first-stage second fixing member 51, wherein the first-stage second fixing member 51 is threadedly connected to the second end of the first-stage locking screw 21, so as to lock the first-stage first fixing member 41 and the first-stage impeller 31;

[0077] A secondary locking screw 22, wherein a first end of the secondary locking screw 22 is connected to the rotor shaft 1;

[0078] A secondary impeller 32, the secondary impeller 32 is sleeved on the secondary locking screw 22 and connected to the rotor shaft 1 via a flat key 14;

[0079] A secondary first fixing member 42, wherein the secondary first fixing member 42 is threadedly connected to the second end of the secondary locking screw 22, and a secondary linkage structure 62 is provided between the secondary impeller 32 and the secondary first fixing member 42;

[0080] The secondary second fixing member 52 is threadedly connected to the second end of the secondary locking screw 22 to lock the secondary first fixing member 42 and the secondary impeller 32 .

[0081] in:

[0082] The primary linkage structure 61 includes a positioning member 7 and a positioning hole 13 provided on the primary first fixing member 41, and the positioning member 7 passes through the positioning hole 13 to be connected to the primary impeller 31. The positioning member 7 is a bolt, and a threaded hole 8 is provided on the primary impeller 31, and the bolt passes through the positioning hole 13 to be threadedly connected to the threaded hole 8.

[0083] The secondary linkage structure 62 includes a fixing ring 10, and a countersunk hole 9 is arranged on the secondary impeller 32. The fixing ring 10 is arranged between the secondary first fixing piece 42 and the countersunk hole 9. The shape of the countersunk hole 9 is adapted to the outer wall of the fixing ring 10, and the inner wall of the fixing ring 10 is adapted to the secondary first fixing piece 42.

[0084] Furthermore, a primary centering structure is provided between the rotor shaft 1 and the primary locking screw 21 , and the primary centering structure includes a primary conical groove 111 provided on the rotor shaft 1 and a primary conical protrusion 121 provided on the primary locking screw 21 , and the primary conical protrusion 121 cooperates with the primary conical groove 111 .

[0085] A secondary centering structure is provided between the rotor shaft 1 and the secondary locking screw 22 , and the secondary centering structure includes a secondary conical groove 112 provided on the rotor shaft 1 and a secondary conical protrusion 122 provided on the secondary locking screw 22 , and the secondary conical protrusion 122 cooperates with the secondary conical groove 112 .

[0086] Specifically, a threaded hole 8 is provided in the rotor shaft 1, and an external thread is provided at the first end of the first-level locking screw 21, and the first end of the first-level locking screw 21 is threadedly connected to the threaded hole 8; a first-level conical groove 111 is provided at the end of the threaded hole 8, and a first-level conical protrusion 121 is correspondingly provided on the first-level locking screw 21.

[0087] A threaded hole 8 is provided in the rotor shaft 1, and an external thread is provided at the first end of the secondary locking screw 22, and the first end of the secondary locking screw 22 is threadedly connected to the threaded hole 8; a secondary conical groove 112 is provided at the end of the threaded hole 8, and a secondary conical protrusion 122 is correspondingly provided on the secondary locking screw 22.

[0088] Embodiment 2:

[0089] The difference between the present embodiment 2 and the embodiment 1 is that the primary linkage structure 61 is the same as the secondary linkage structure 62. The primary linkage structure 61 includes a positioning member 7 and a positioning hole 13 provided on the primary first fixing member 41, and the positioning member 7 passes through the positioning hole 13 to be connected to the primary impeller 31. The positioning member 7 is a bolt, and a threaded hole 8 is provided on the primary impeller 31, and the bolt passes through the positioning hole 13 to be threadedly connected to the threaded hole 8.

[0090] The secondary linkage structure 62 includes a positioning member 7 and a positioning hole 13 provided on the secondary first fixing member 42, and the positioning member 7 passes through the positioning hole 13 to be connected with the secondary impeller 32. The positioning member 7 is a bolt, and a threaded hole 8 is provided on the secondary impeller 32, and the bolt passes through the positioning hole 13 and is threadedly connected with the threaded hole 8.

[0091] Embodiment 3:

[0092] The difference between this embodiment 3 and embodiment 2 is that the first-level linkage structure 61 includes a fixing ring 10, a countersunk hole 9 is arranged on the first-level impeller 31, the fixing ring 10 is arranged between the first-level fixing piece 41 and the countersunk hole 9, the shape of the countersunk hole 9 is adapted to the outer wall of the fixing ring 10, and the inner wall of the fixing ring 10 is adapted to the first-level fixing piece 41.

[0093] The secondary linkage structure 62 includes a fixing ring 10, and a countersunk hole 9 is arranged on the secondary impeller 32. The fixing ring 10 is arranged between the secondary first fixing piece 42 and the countersunk hole 9. The shape of the countersunk hole 9 is adapted to the outer wall of the fixing ring 10, and the inner wall of the fixing ring 10 is adapted to the secondary first fixing piece 42.

[0094] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] Of course, the invention of the present invention is not limited to the above-mentioned implementation modes. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An impeller locking structure, characterized in that: include: A locking screw, wherein a first end of the locking screw is connected to the rotor shaft; An impeller, the impeller being sleeved on the locking screw and connected to the rotor shaft; a first fixing member, wherein the first fixing member is threadedly connected to the second end of the locking screw, and a linkage structure is provided between the impeller and the first fixing member; A second fixing member is threadedly connected to the second end of the locking screw to lock the first fixing member and the impeller.

2. The impeller locking structure according to claim 1, characterized in that: The linkage structure includes a positioning member and a positioning hole arranged on the first fixing member, and the positioning member passes through the positioning hole to be connected with the impeller.

3. The impeller locking structure according to claim 2, characterized in that: The positioning member is a bolt, a threaded hole is provided on the impeller, and the bolt passes through the positioning hole and is threadedly connected with the threaded hole.

4. The impeller locking structure according to claim 1, characterized in that: The linkage structure includes a fixing ring, a countersunk hole is arranged on the impeller, the fixing ring is arranged between the first fixing piece and the countersunk hole, the shape of the countersunk hole is adapted to the outer wall of the fixing ring, and the inner wall of the fixing ring is adapted to the first fixing piece.

5. The impeller locking structure according to claim 4, characterized in that: The sink hole is a hexagonal structural hole, a quadrilateral structural hole, a triangular structural hole or other special-shaped structural holes.

6. The impeller locking structure according to any one of claims 1 to 5, characterized in that: A centering structure is provided between the rotor shaft and the locking screw, wherein the centering structure comprises a conical groove provided on the rotor shaft and a conical protrusion provided on the locking screw, wherein the conical protrusion matches the conical groove.

7. The impeller locking structure according to claim 6, characterized in that: A threaded hole is arranged in the rotor shaft, an external thread is arranged at the first end of the locking screw, and the first end of the locking screw is threadedly connected to the threaded hole; a conical groove is arranged at the end of the threaded hole, and a conical protrusion is correspondingly arranged on the locking screw.

8. The impeller locking structure according to claim 6, characterized in that: The rotor shaft is threadedly connected to the locking screw, and the tightening direction of the rotor shaft and the locking screw is opposite to the rotation direction of the impeller.

9. The impeller locking structure according to claim 8, characterized in that: The rotor shaft is connected to the locking screw via a fine pitch thread.

10. The impeller locking structure according to any one of claims 1 to 5, characterized in that: The second end of the locking screw is provided with an external hexagonal structure.

11. A magnetically suspended air compressor impeller rotor, characterized in that: It comprises the impeller locking structure as described in any one of claims 1-10.

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