Novel variable frequency motor structure

Abstract

According to the novel variable frequency motor structure, a crankshaft sequentially penetrates through a shaft hole of an air cylinder seat from top to bottom and is in interference fit with a mounting hole of a motor rotor, an inner ring of a motor stator is in interference fit with the outer circle of the shaft hole of the air cylinder seat, and a plurality of vertically-through stator inner winding grooves are formed in the inner ring of the motor stator around the outer side of a stator inner hole; a stator outer winding groove is correspondingly formed outside each stator inner winding groove, the stator inner winding grooves are communicated with the corresponding stator outer winding grooves through circular openings, concave annular stator U grooves are formed in the bottom sides of final inspection of the motor stator inner winding grooves and the motor stator outer winding grooves, and the stator U grooves annularly penetrate through the circular openings. The novel variable frequency motor structure is simple and convenient to install and high in universality; the motor stator structure is high in silicon steel utilization rate, and adopts inner and outer double-layer winding grooves, thereby saving space and improving efficiency. By controlling the internal and external coaxiality of the shaft hole of the cylinder seat, the air gap of the motor is free of correction, and the labor cost is greatly reduced; the air cylinder seat of the structure does not need to be provided with machine legs, and cost of the compressor is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of variable frequency motor structures, and in particular to a novel variable frequency motor structure. Background Art

[0002] The variable frequency motor is a synchronous motor whose speed is related to the power supply frequency. It adopts the AC speed regulation method of "dedicated variable frequency induction motor + inverter", which greatly improves the degree of mechanical automation and production efficiency, and at the same time realizes the miniaturization of equipment. According to different working principles and application scenarios, variable frequency motors can be divided into many types, such as three-phase asynchronous variable frequency motors, DC brushless variable frequency motors, AC brushless variable frequency motors, and switched reluctance variable frequency motors.

[0003] The existing variable frequency motor cylinder seat and motor stator fixing method is to install the motor on the cylinder seat by screws passing through the motor stator screw holes, that is, to install the motor on the cylinder seat by screws at four angles or three angles.

[0004] This fixed installation method has the following disadvantages:

[0005] 1. The installation is complicated and requires high screw strength;

[0006] 2. The motor stator matching the cylinder seat needs to be positioned during installation, which is not conducive to production efficiency;

[0007] 3. The motor stator that matches the cylinder seat needs more screw hole material for installation, so the cost of the cylinder seat and motor is relatively high;

[0008] 4. The motor silicon steel structure requires several more stator screw spaces to fix the motor, which increases the demand for motor silicon steel and thus increases costs.

[0009] In summary, it is necessary to design a new variable frequency motor structure to solve the above problems. Summary of the invention

[0010] The technical problem to be solved by the present invention is that a new variable frequency motor structure is proposed to solve the problems that the existing variable frequency motor cylinder seat and the motor stator are fixed with screws, which has low production efficiency, high cost and inconvenient installation.

[0011] In order to solve the above technical problems, the present invention provides a novel variable frequency motor structure, including: a cylinder seat, a crankshaft, a motor stator and a motor rotor, the crankshaft passes through the axial hole of the cylinder seat, the stator inner hole of the motor stator and the mounting hole of the motor rotor from top to bottom in sequence, the motor stator is made of silicon steel sheets, and a plurality of stator inner winding grooves that penetrate up and down are arranged around the outer periphery of the stator inner hole, each stator inner winding groove is correspondingly provided with a stator outer winding groove, the stator inner winding groove is connected with the corresponding stator outer winding groove through a circular opening, and an inward-recessed annular stator U-groove is provided on the bottom side of the motor stator, the stator U-groove circumferentially penetrates each circular opening, that is, a U-shaped groove is formed between the inner and outer layers of the stator winding coils, and the magnetic shoe operates inside the annular U-groove.

[0012] In a preferred embodiment of the present scheme, the lower end of the cylinder seat is inserted into the inner hole of the stator and has an interference fit with the motor stator. This design can avoid the problem of using bolts when installing a traditional motor, which not only simplifies the structure but also makes installation more convenient.

[0013] In a preferred embodiment of the present solution, the number of the inner winding slots of the stator and the number of the outer winding slots of the stator are both 3N, wherein N is an integer greater than 1.

[0014] Furthermore, the inner cavity cross-section of the stator U slot is square or trapezoidal.

[0015] In a preferred embodiment of the present invention, the mounting hole of the crankshaft and the motor rotor are interference fit.

[0016] Furthermore, a circle of rotor magnetic tiles is arranged around the top side of the motor rotor, and the rotor magnetic tiles are inserted into the stator U slots opened on the bottom end of the motor stator.

[0017] Furthermore, the rotor magnetic shoe is an integrally formed ring or spliced ​​ring or spliced ​​regular polygon structure, and will not loosen or fall off after being inserted into the U-slot of the motor stator.

[0018] Furthermore, a plurality of through holes are provided at intervals on the bracket of the motor rotor around the mounting hole.

[0019] The implementation of the present invention has the following beneficial effects:

[0020] The new variable frequency motor structure is simple and convenient to install, and has strong versatility; the motor stator structure has a high utilization rate of silicon steel, and there is no need to prepare stator screw holes. At the same time, it adopts inner and outer double-layer winding grooves, which saves space and improves efficiency;

[0021] The cylinder seat and the stator are matched by the stator internal control and the outer circle of the cylinder seat shaft hole. The installation structure is simple, which reduces the screw fastening installation process. By controlling the coaxiality of the inside and outside of the cylinder seat shaft hole, the motor air gap can be calibrated free, which greatly reduces the labor cost.

[0022] The cylinder seat of this structure does not need to be installed with machine feet, which greatly saves the cylinder seat material and reduces the cost of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is the exploded structural diagram of the new variable frequency motor structure;

[0025] Figure 2 It is a structural schematic diagram of a new variable frequency motor structure;

[0026] Figure 3 It is a cross-sectional structural diagram of a new variable frequency motor structure;

[0027] Figure 4 It is a schematic diagram of the top view structure of the motor stator;

[0028] Figure 5 It is a schematic diagram of the structure of the motor stator from above;

[0029] Figure 6 This is a schematic diagram of the structure of the motor rotor.

[0030] In the figure: cylinder seat 1, crankshaft 2, motor stator 3, motor rotor 4, shaft hole 5, stator inner hole 6, mounting hole 7, stator inner winding groove 8, stator outer winding groove 9, circular opening 10, stator U groove 11, rotor magnetic tile 12, bracket 13 and through hole 14. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-3 , Figure 1 It is the exploded structural diagram of the new variable frequency motor structure; Figure 2 It is a structural schematic diagram of a new variable frequency motor structure; Figure 3 It is a schematic cross-sectional view of a novel variable frequency motor structure; the novel variable frequency motor structure comprises: a cylinder seat 1, a crankshaft 2, a motor stator 3 and a motor rotor 4.

[0033] The crankshaft 2 passes through the shaft hole 5 of the cylinder block 1, the stator inner hole 6 of the motor stator 3 and the mounting hole 7 of the motor rotor 4 in sequence from top to bottom.

[0034] Specifically, the lower end of the cylinder seat 1 is inserted into the stator inner hole 6 and has an interference fit with the motor stator 3 , and the crankshaft 2 has an interference fit with the mounting hole 7 of the motor rotor 4 .

[0035] The motor stator 3 is made of silicon steel sheets, and a plurality of stator inner winding slots 8 are arranged around the stator inner hole 6, and each stator inner winding slot 8 is provided with a corresponding stator outer winding slot 9. The stator inner winding slot 8 is connected with the corresponding stator outer winding slot 9 through a circular opening 10, and the circular opening 10 is used to facilitate the use of the winding equipment to thread the needle. Figure 4 , Figure 4 Schematic diagram of the top view of the motor stator. The number of the inner winding slots 8 and the outer winding slots 9 of the stator are both 3N, where N is an integer greater than 1, such as 6, 9, 12, etc.

[0036] The bottom side of the motor stator 3 is provided with an inwardly recessed annular stator U-groove 11, which circumferentially penetrates each circular opening 10. Figure 5 , Figure 5 1 is a schematic diagram of the motor stator structure viewed from above. In this embodiment, the inner cavity cross section of the stator U slot 11 is a square or trapezoidal structure.

[0037] A circle of rotor magnetic tiles 12 is arranged around the top side of the motor rotor 4. The rotor magnetic tiles 12 are inserted into the stator U slots 11 opened at the bottom end of the motor stator 3. Figure 6 , Figure 6 The rotor magnetic tile 12 is an integrally formed ring or spliced ​​ring or spliced ​​regular polygon structure. A plurality of through holes 14 are provided on the bracket 13 of the motor rotor 4 around the mounting hole 7 at intervals.

[0038] The novel variable frequency motor structure of the present invention is easy and quick to install and has strong versatility. During installation, no screws are needed between the cylinder seat and the motor stator, and the installation can be achieved directly by matching the inner hole of the stator with the outer circle of the cylinder seat shaft hole. By controlling the inner and outer coaxiality of the cylinder seat shaft hole, the motor air gap calibration is eliminated, reducing labor costs.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new variable frequency motor structure, characterized in that: include: A cylinder seat, a crankshaft, a motor stator and a motor rotor, wherein the crankshaft passes through the axial hole of the cylinder seat, the stator inner hole of the motor stator and the mounting hole of the motor rotor in sequence from top to bottom, the motor stator is made of silicon steel sheets, and a plurality of stator inner winding grooves are arranged around the outer periphery of the stator inner hole, each of which is provided with a corresponding stator outer winding groove, the stator inner winding groove is connected with the corresponding stator outer winding groove through a circular opening, and an inwardly recessed annular stator U-groove is provided on the bottom side of the final inspection of the inner and outer winding grooves of the motor stator, and the stator U-groove circumferentially penetrates each of the circular openings.

2. The novel variable frequency motor structure according to claim 1 is characterized in that: The lower end of the cylinder seat is inserted into the inner hole of the stator and is interference fit with the motor stator.

3. The novel variable frequency motor structure according to claim 1 is characterized in that: The number of the inner winding slots of the stator and the number of the outer winding slots of the stator are both 3N, wherein N is an integer greater than 1.

4. The novel variable frequency motor structure according to claim 3 is characterized in that: The inner cavity cross section of the stator U slot is square or trapezoidal.

5. The novel variable frequency motor structure according to claim 1 is characterized in that: The crankshaft is interference-fitted with the mounting hole of the motor rotor.

6. The novel variable frequency motor structure according to claim 6 is characterized in that: A circle of rotor magnetic tiles is arranged around the outer periphery of the top side of the motor rotor, and the rotor magnetic tiles are inserted into the stator U slots opened on the bottom end of the motor stator.

7. The novel variable frequency motor structure according to claim 7 is characterized in that: The rotor magnetic shoe is an integrally formed ring-shaped structure or a spliced ​​ring-shaped structure or a spliced ​​regular polygonal structure.

8. The novel variable frequency motor structure according to claim 8 is characterized in that: A plurality of through holes are arranged at intervals on the bracket of the motor rotor around the mounting hole.

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