Rotor structure of air compressor
By using mortise and tenon connections in the rotor structure of the air compressor instead of the traditional interference coordination, the problems of high manufacturing costs and large electromagnetic heat in the prior art are solved, and higher reliability and lower production costs and heat generation are achieved.
Patent Information
- Application Number
- CN202422189124.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The rotor structure of the existing air compressor requires a large interference amount to ensure the stability of torque transmission, resulting in high manufacturing costs and high electromagnetic heat.
The mortise and tenon connection is used instead of the traditional interference fit. The torque is transmitted between the magnet and the half-axis through the mortise and tenon connection, reducing the connection strength and interference between the sheath and the shaft.
It improves the reliability of torque transmission, reduces manufacturing difficulty and production costs, and reduces the heat generation of the rotor structure.
Smart Images
Figure CN223024186U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of air compressors, in particular to a rotor structure of an air compressor. Background Art
[0002] An electric air compressor is used to increase the gas density and improve the gas utilization rate. An electronic electromagnetic air compressor is generally driven by a high-speed motor. The stator coil of the high-speed motor is fixed on the machine shell, and its rotor magnet is fixed inside the rotating shaft. The magnet is driven by a high-frequency current to rotate in the magnetic field of the coil, thereby driving the rotating shaft and the pressure wheel on the rotating shaft to rotate, achieving the purpose of compressing air.
[0003] As Figure 1 shown, in the prior art, the rotor structure generally consists of four parts: a left half shaft, a right half shaft, a magnet, and a sheath. The left half shaft, the right half shaft, and the magnet are fixedly connected to the sheath as a whole by an interference fit. The three parts transmit torque through the frictional force generated by the interference amount. In order to ensure the stability of torque transmission, a relatively large interference amount is often required, so the wall thickness of the sheath is required to be very thick, which will result in a high manufacturing cost of the rotor structure, and when the rotor works, a large amount of electromagnetic heat is generated. Summary of the Utility Model
[0004] The purpose of the utility model is to design a rotor structure of an air compressor to solve the above problems.
[0005] The utility model realizes the above purpose through the following technical solutions:
[0006] A rotor structure of an air compressor, comprising:
[0007] Two half shafts;
[0008] Magnets; the first ends of the two half shafts are respectively located at the first end and the second end of the magnet;
[0009] Sheath; the first ends of the two half shafts and the magnet are fixed on the inner side wall of the sheath;
[0010] Two connectors; the two connectors are respectively used for the drive connection between the first ends of the two half shafts and the first end and the second end of the magnet; each connector includes at least one connecting sub-component, and each connecting sub-component includes a boss and a groove. The boss is located in the groove. The boss is arranged at the first end of the half shaft or one end of the magnet, and the groove is arranged at one end of the magnet or the first end of the half shaft.
[0011] The beneficial effects of the present utility model are as follows: The torque is transmitted between the magnetic steel and the half shaft through mortise and tenon connection, and the reliability is higher than that of the traditional interference fit; Due to the adoption of mortise and tenon connection, the connection strength between the sheath and the rotating shaft can be appropriately reduced, the interference amount of mutual cooperation can be reduced, the manufacturing difficulty is reduced, and the thickness of the sheath can also be correspondingly reduced, saving the production cost; Due to the reduction of the sheath thickness, less electromagnetic heat is generated in the rotor structure during operation, reducing the heat generation of the rotor structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic diagram of the rotor structure of the prior art;
[0013] Figure 2 is a schematic diagram of the internal structure of the rotor structure of an air compressor of the present utility model;
[0014] Figure 3 is a schematic diagram of the structure of the magnetic steel in the rotor structure of an air compressor of the present utility model;
[0015] Figure 4 is a schematic diagram of the structure of the half shaft in the rotor structure of an air compressor of the present utility model;
[0016] Among them, the corresponding reference numerals are:
[0017] 1 - half shaft, 2 - sheath, 3 - magnetic steel, 11 - boss, 12 - blind hole inner cavity, 31 - groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.
[0020] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is habitually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0022] In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.
[0023] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, terms such as "arrangement" and "connection" should be understood in a broad sense. For example, "connection" 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, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] The following will describe in detail the specific embodiments of the present utility model with reference to the drawings.
[0025] As Figures 2 - 4 shown, a rotor structure of an air compressor includes:
[0026] Two half shafts 1;
[0027] Magnets 3; the first ends of the two half shafts 1 are respectively located at the first end and the second end of the magnet 3;
[0028] Sheaths 2; the first ends of the two half shafts 1 and the magnet 3 are fixed on the inner side wall of the sheath 2;
[0029] Two connecting members; the two connecting members are respectively used for the transmission connection between the first ends of the two half shafts 1 and the first end and the second end of the magnet 3; each connecting member includes at least one connecting sub-member, and each connecting sub-member includes a boss 11 and a groove 31. The boss 11 is located in the groove 31, and the boss 11 is arranged at the first end of the half shaft 1 or one end of the magnet 3, and the groove 31 is arranged at one end of the magnet 3 or the first end of the half shaft 1.
[0030] The torque is transmitted between the permanent magnet 3 and the half shaft 1 through tenon and mortise connection, and the reliability is higher than that of the traditional interference fit; due to the adoption of tenon and mortise connection, the connection strength between the sheath 2 and the rotating shaft can be appropriately reduced, the interference amount of mutual cooperation can be reduced, the manufacturing difficulty is reduced, and the thickness of the sheath 2 can also be correspondingly reduced, saving the production cost; due to the reduction of the thickness of the sheath 2, when the rotor structure works, less electromagnetic heat is generated in the rotor structure, reducing the heat generation of the rotor structure.
[0031] The number of connecting sub-pieces is at least two, and the bosses 11 of all connecting sub-pieces are arranged in an annular array with the central axis of the half shaft 1 or the permanent magnet 3 as the center of the circle.
[0032] The number of connecting sub-pieces is two. The grooves 31 at both ends of the permanent magnet 3 can be simplified into a groove 31 penetrating in the diameter direction, and the boss 11 at the first end of the half shaft 1 can be simplified into a boss 11 penetrating in the diameter, which is convenient for processing and assembly.
[0033] The groove 31 is a dovetail groove structure, and the structure of the boss 11 is matched with the dovetail groove structure of the groove 31. The dovetail groove structure connection can bear a certain axial force while transmitting torque.
[0034] Blind hole cavities 12 are arranged at the first ends of the half shafts 1. Since the rotating shaft mainly transmits torsional force, the anti-torsion strength of the hollow structure and the solid structure is basically the same. This structure can reduce the weight of the rotor, reduce the rotational inertia of the rotor, and improve the rotational efficiency and responsiveness of the rotating shaft; due to the reduction of the interference amount between the sheath 2 and the rotor, the inside of the half shaft 1 can be set as a hollow structure, which reduces the rotational inertia of the rotor and reduces the generation of electro-thermal heat while ensuring sufficient torque transmission, improving the working efficiency of the rotor.
[0035] The first ends of the two half shafts 1 and the permanent magnet 3 are fixed to the inner side wall of the sheath 2 by interference connection.
[0036] The technical solution of the present utility model is not limited to the restrictions of the above specific embodiments. Any technical deformation made according to the technical solution of the present utility model falls within the protection scope of the present utility model.
Claims
1. A rotor structure of an air compressor, characterized in that: include: Two half shafts; magnetic steel; The first ends of the two half shafts are respectively located at the first end and the second end of the magnetic steel; jacket; The first ends of the two half shafts and the magnetic steel are fixed to the inner wall of the sheath; Two connecting parts; the two connecting parts are respectively used for transmission connection between the first end of the two half-shafts and the first end and the second end of the magnetic steel; each connecting part includes at least one connecting sub-component, and each connecting sub-component includes a boss and a groove, the boss is located in the groove, the boss is arranged at the first end of the half-shaft or one end of the magnetic steel, and the groove is arranged at one end of the magnetic steel or the first end of the half-shaft.
2. The rotor structure of an air compressor according to claim 1, characterized in that: The number of the connecting sub-components is at least two, and the bosses of all the connecting sub-components are arranged in a circular array with the central axis of the half shaft or the magnetic steel as the center.
3. The rotor structure of an air compressor according to claim 1 or 2, characterized in that: The groove is a dovetail groove structure, and the structure of the boss is matched with the dovetail groove structure of the groove.
4. The rotor structure of an air compressor according to claim 1, characterized in that: The first ends of the half shafts are each provided with a blind hole inner cavity.
5. The rotor structure of an air compressor according to claim 1, characterized in that: The first ends of the two half shafts and the magnetic steel are fixed to the inner wall of the sleeve through interference connection.