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CN-224233527-U - Linear motor and linear compressor

CN224233527UCN 224233527 UCN224233527 UCN 224233527UCN-224233527-U

Abstract

The utility model relates to the technical field of linear motors and provides a linear motor and a linear compressor, wherein the linear motor comprises a stator part and a rotor part, the stator part comprises an inner stator, an outer stator and coils, one of the inner stator and the outer stator comprises at least two groups of stator blocks, each stator block is provided with a coil, the rotor part comprises a connecting bracket and permanent magnets, each group of stator blocks corresponds to one group of permanent magnets, each group of permanent magnets is circumferentially distributed along a cylindrical structure, each group of permanent magnets comprises at least two permanent magnets, each permanent magnet of each group of permanent magnets is axially distributed along the cylindrical structure, the magnetizing direction of each permanent magnet is parallel to the distribution directions of the cylindrical structure and the stator blocks corresponding to the permanent magnets, the south pole of one of the two adjacent permanent magnets faces the inner stator, and the south pole of the other permanent magnet faces the outer stator. Therefore, the magnetic poles of the positions, close to each other, of any two adjacent permanent magnets are opposite and mutually attracted, so that the magnetic field intensity of the permanent magnets is enhanced, the installation and positioning are improved, the assembly difficulty is reduced, and the positioning accuracy is improved.

Inventors

  • TANG MINGSHENG
  • LIU SHANQUAN
  • ZOU HUIMING
  • TIAN CHANGQING

Assignees

  • 中国科学院理化技术研究所

Dates

Publication Date
20260512
Application Date
20250417

Claims (10)

  1. 1. A linear motor, comprising: The stator component comprises an inner stator (1), an outer stator and a coil (2), wherein one of the inner stator (1) and the outer stator is of a hollow cylindrical structure, the other one of the inner stator and the outer stator comprises at least two groups of stator blocks (3), the stator blocks (3) of each group are distributed at intervals along the circumferential direction of the cylindrical structure, and each stator block (3) is provided with the coil (2); The rotor component comprises a connecting support (7) and at least two groups of permanent magnets (5), wherein each group of permanent magnets (5) are fixedly arranged on the connecting support (7), the permanent magnets (5) are arranged between the stator block (3) and the cylindrical structure, each group of permanent magnets (5) are distributed along the circumferential direction of the cylindrical structure, each group of stator block (3) corresponds to one group of permanent magnets (5), each group of permanent magnets (5) comprises at least two permanent magnets (5), each group of permanent magnets (5) is distributed along the axial direction of the cylindrical structure, the magnetizing direction of each permanent magnet (5) is parallel to the distribution direction of the cylindrical structure and the stator block (3) corresponding to the permanent magnet (5), the south poles of any adjacent two permanent magnets (5) face the inner stator (1), and the south poles of the other permanent magnets face the outer stator.
  2. 2. Linear motor according to claim 1, characterized in that the stator block (3) is provided with a threading space (6), the threading space (6) penetrates the stator block (3) along the circumference of the tubular structure, a gap (4) is arranged at one side of the stator block (3) close to the mover component, the gap (4) is communicated with the threading space (6), and the coil (2) is suitable for being sleeved on any side wall of the threading space (6).
  3. 3. The linear motor according to claim 2, wherein each stator block (3) is provided with two threading spaces (6), the two threading spaces (6) are distributed at intervals along the axial direction of the tubular structure, and a columnar structure is formed between the two threading spaces (6); Each threading space (6) corresponds to one coil (2), the coil (2) is suitable for being sleeved on the side wall, far away from the columnar structure, of the threading space (6), or two threading spaces (6) correspond to one coil (2), and the coil (2) is suitable for being sleeved on the columnar structure.
  4. 4. A linear motor according to claim 3, characterized in that each stator piece (3) corresponds to two permanent magnets (5) in the axial direction of the tubular structure; Or along the axial direction of the cylindrical structure, each stator block (3) corresponds to four permanent magnets (5).
  5. 5. Linear motor according to claim 2, characterized in that each stator block (3) is provided with one threading space (6), each stator block (3) corresponding to three permanent magnets (5) along the axial direction of the tubular structure; Each threading space (6) corresponds to one coil (2), or each threading space (6) corresponds to two coils (2).
  6. 6. A linear motor according to any one of claims 1-5, characterized in that each set of stator pieces (3) comprises at least two stator pieces (3), each of the stator pieces (3) of each set being distributed along the axial direction of the tubular structure.
  7. 7. A linear motor according to claim 6, characterized in that the coils (2) are connected in series, the winding directions of the coils (2) on any adjacent two groups of stator blocks (3) being opposite; When two coils (2) are arranged on each stator block (3), the winding directions of the two coils (2) on each stator block (3) are opposite.
  8. 8. A linear motor according to claim 6, characterized in that the number and direction of windings of the coils (2) of each of the stator blocks (3) of each group, any adjacent two, coincide.
  9. 9. A linear motor according to any one of claims 1-5, characterized in that the stator block (3) is integrally formed from soft magnetic material, or that the stator block (3) comprises a plurality of magnetically permeable sheets, which are stacked together; and/or the connecting bracket (7) is made of non-magnetic conductive material.
  10. 10. A linear compressor comprising a linear motor as claimed in any one of claims 1 to 9.

Description

Linear motor and linear compressor Technical Field The utility model relates to the technical field of linear motors, in particular to a linear motor and a linear compressor. Background A linear compressor is an apparatus for directly compressing gas using linear reciprocating motion of a piston, which has higher efficiency and less mechanical loss than a conventional rotary compressor. The traditional linear compressor relies on a crank-link mechanism to convert rotary motion into linear motion, and has the problems of high mechanical loss, complex lubrication system and the like. Therefore, in some related technologies, a linear motor is selected as a driving piece, and a piston is directly driven to perform linear reciprocating motion, so that an intermediate transmission mechanism is omitted, the efficiency of a compressor can be obviously improved, and the compressor has the advantages of compact structure, oil-free or less lubricating oil and the like, and has become the main stream choice of small refrigeration equipment such as medical low-temperature refrigerators, vehicle-mounted air conditioners and the like. The linear compressor in the related art has the defects of layout, the magnetic field at the spliced joint of the permanent magnets is weakened, the magnetic energy utilization rate is lower, the assembly is difficult, the repulsive force between the permanent magnets is unfavorable for the installation and positioning of each permanent magnet, and the positioning accuracy is poor. Therefore, how to solve the problems of the linear motor in the related art that the magnetic field at the assembly joint of the permanent magnets is weakened, the assembly is difficult and the installation positioning precision is poor becomes an important technical problem to be solved by the person skilled in the art. Disclosure of utility model The utility model provides a linear motor and a linear compressor, which are used for solving the defects of weakening of a magnetic field at a permanent magnet assembly joint, difficult assembly and poor installation and positioning precision of the linear motor in the related art, reducing the assembly difficulty and improving the installation and positioning precision. The present utility model provides a linear motor, comprising: The stator component comprises an inner stator, an outer stator and coils, one of the inner stator and the outer stator is of a hollow cylindrical structure, the other one of the inner stator and the outer stator comprises at least two groups of stator blocks, each group of stator blocks is distributed at intervals along the circumferential direction of the cylindrical structure, and each stator block is provided with the coils; The rotor component comprises a connecting support and at least two groups of permanent magnets, wherein each group of permanent magnets are fixedly arranged on the connecting support, the permanent magnets are arranged between the stator block and the cylindrical structure, each group of permanent magnets are distributed along the circumferential direction of the cylindrical structure, each group of stator block corresponds to one group of permanent magnets, each group of permanent magnets comprises at least two permanent magnets, each group of permanent magnets is distributed along the axial direction of the cylindrical structure, the magnetizing direction of each permanent magnet is parallel to the distribution direction of the cylindrical structure and the stator block corresponding to the permanent magnet, the south pole of one of any two adjacent permanent magnets faces the inner stator, and the south pole of the other faces the outer stator. According to the linear motor provided by the utility model, the stator block is provided with the threading space, the threading space penetrates through the stator block along the circumferential direction of the cylindrical structure, one side, close to the rotor component, of the stator block is provided with the notch, the notch is communicated with the threading space, and the coil is suitable for being sleeved on any side wall of the threading space. According to the linear motor provided by the utility model, each stator block is provided with two threading spaces, the two threading spaces are distributed at intervals along the axial direction of the cylindrical structure, and a columnar structure is formed between the two threading spaces; Each threading space corresponds to one coil, the coil is suitable for being sleeved on the side wall of the threading space far away from the columnar structure, or two threading spaces correspond to one coil, and the coil is suitable for being sleeved on the columnar structure. According to the linear motor provided by the utility model, each stator block corresponds to two permanent magnets along the axial direction of the cylindrical structure; Or each stator block corresponds to four permanent magnets along the axial dire