CN117240042A - High-thrust reciprocating permanent magnet linear motor and compressor thereof - Google Patents

Abstract

The application relates to a high-thrust reciprocating permanent magnet linear motor and a compressor thereof, comprising a stator assembly and a rotor assembly, wherein the stator assembly comprises at least one group of stator assemblies, the rotor assembly comprises a movable shaft and at least one group of rotor assemblies, the rotor assemblies are fixed on the movable shaft, the high-thrust reciprocating permanent magnet linear motor is provided with an axial elastic piece, the elastic piece and the rotor assembly form an elastic system, the rotor assembly comprises a counterweight structure for matching with the total mass, the total mass of the rotor assembly can be adjusted and increased by utilizing the counterweight structure, and the elastic coefficient of the elastic piece is reasonably matched, so that the resonance frequency of the elastic system is in a proper frequency range, when equipment works in an effective state of the resonance frequency, a larger driving force can be output, and meanwhile, the lower working frequency also greatly reduces the processing difficulty of equipment springs, and the requirement on the mechanical strength of each part of the equipment, thereby solving the technical problems of designing and manufacturing the long-term high-thrust linear motor and the compressor thereof.

Description

High-thrust reciprocating permanent magnet linear motor and compressor thereof

Technical Field

The application relates to a linear motor compressor, in particular to a high-thrust reciprocating permanent magnet linear motor and a compressor thereof.

Background

Existing reciprocating permanent magnet linear compressors typically include a power mechanism and a compressor mechanism comprised of a permanent magnet linear motor. The permanent magnet linear motor comprises a stator assembly formed by a plurality of stator components, a rotor assembly formed by a plurality of rotor components and a movable shaft; the compressor mechanism includes a cylinder, a piston, and a piston rod. The stator assembly is annular, the rotor assembly is fixedly arranged on the moving shaft, the rotor assembly is opposite to the stator assembly, and the piston rod is in linkage connection with the moving shaft. The permanent magnet linear motor inputs exciting current into the exciting coil to enable the stator assembly to generate an electromagnetic field, and drives the rotor assembly to reciprocate under the interaction of the electromagnetic field and the permanent magnet and drive the piston rod and the piston to finish the circulating suction, compression and discharge processes. In order to enable the rotor assembly to have certain restoring force in the working process and play a role in preventing the compressor from knocking the cylinder, elastic elements such as an oscillating spring and the like are arranged in the existing reciprocating permanent magnet linear compressor to enable the rotor assembly to elastically restore the oscillating force in the axial direction to achieve higher working efficiency. The reciprocating permanent magnet linear compressor has reasonable and compact structure and small size, and may be used as the compressor of air conditioner, refrigerator and other refrigerating equipment.

The pump equipment applied in the fields of chemical industry, pharmacy, aerospace, aviation and the like needs larger thrust compression equipment, and has higher requirements on the working efficiency of the equipment. The current global academic theory world and international linear motor industry huge heads such as korean LG company, brazilian brazil department company, domestic compressor industry huge heads and the like design the reciprocating stroke design and power (thrust) of the linear motor, all use the theory that the lighter the mover assembly in the linear motor is, the more energy-saving the excitation electricity is pushed to guide the design. Therefore, when the linear motor compressor is studied to perform reciprocating motion, the linear motor piston compressor is designed and manufactured globally by using a resonant circuit and then matching the elastic force of an oscillating spring of the linear motor. However, according to the above design concept, if the power (thrust) of the motor can be increased only by increasing the stroke of the reciprocating linear motor and increasing the flow rate and pressure of the compressed thrust gas, the working frequency (reciprocating motion) of the linear motor will also be geometrically increased, but this will result in severe motion and intolerable noise of the mover assembly. Because of the above-mentioned technical problems, it is difficult to operate large linear motor at such high frequency (speed), and the spring manufacturing technology applied to large linear motor compressor equipment has not been solved, it has been a worldwide problem of cutting into large linear motor piston compressors and large cryogenic refrigerator manufacturing technologies since the last century.

Disclosure of Invention

The application aims to provide a high-thrust reciprocating permanent magnet linear motor with simple and reasonable structure, aiming at the defects in the prior art.

In order to achieve the above purpose, the present application provides the following technical solutions: the utility model provides a high thrust reciprocating type permanent magnet linear motor, includes stator assembly and rotor assembly, the stator assembly includes at least a set of stator module, the rotor assembly includes movable shaft and at least a set of rotor subassembly, the rotor subassembly is fixed on the movable shaft, the stator module with the rotor subassembly sets up relatively, on the rotor subassembly with the corresponding position of stator module is equipped with the permanent magnet, rotor assembly axial reciprocal slidable sets up its characterized in that: the high-thrust reciprocating permanent magnet linear motor is characterized in that an axial elastic piece is further arranged in the high-thrust reciprocating permanent magnet linear motor, the elastic piece and the rotor assembly form an elastic system, the elastic piece enables the rotor assembly to have an elastic damping force opposite to the motion direction of the rotor assembly, the rotor assembly comprises a counterweight structure for matching with the total mass, and the counterweight structure comprises one or more of a counterweight piece, a whole or partial size of a part or a high specific gravity material mode.

Compared with the prior art, the beneficial effects are that: according to the high-thrust reciprocating permanent magnet linear motor, the elastic piece and the rotor assembly form an elastic system, the rotor assembly comprises the counterweight structure for matching the total mass of the rotor assembly, the total mass of the rotor assembly can be adjusted and increased by utilizing the counterweight structure, and the counterweight structure is reasonably matched with the elastic coefficient of the elastic piece, so that the resonance frequency and the amplitude (namely the maximum stroke of the movable shaft) of the elastic system are in a proper range, when the equipment works in a state of effective resonance frequency, a larger driving force can be output, meanwhile, the lower working frequency also greatly reduces the processing difficulty of the equipment spring, and the requirement on the mechanical strength of each part of the device, thereby solving the technical problem which puzzles the design and the manufacture of the high-thrust linear motor for a long time.

As a further arrangement of the application, the linear motor is provided with a plurality of groups of rotor assemblies and a plurality of groups of stator assemblies, the plurality of groups of rotor assemblies are distributed and fixed on the moving shaft in an annular shape, and the plurality of groups of stator assemblies are distributed and fixed around the plurality of groups of rotor assemblies in an annular shape.

The application further provides a machine base assembly, wherein a stator containing cavity is arranged in the machine base assembly, spring containing cavities are symmetrically arranged on two sides of the stator containing cavity, shaft holes are formed in the centers of the stator containing cavity and the spring containing cavity to be communicated, the stator assembly is arranged in the stator containing cavity, and the elastic piece is arranged in the spring containing cavity.

The application is further provided with the machine base assembly comprising a left machine base and a right machine base, wherein the left machine base and the right machine base are of hollow cylindrical structures, and the inner cavity forms the spring containing cavity; the left stand and the right stand are arranged at intervals and with opposite end surfaces, the space between the end surfaces of the left stand and the right stand forms the stator accommodating cavity, and the stator assembly is clamped between the end surfaces of the left stand and the right stand; the balance weight containing cavities are formed in the left machine base and the right machine base, balance weight pieces are symmetrically and fixedly arranged on moving shafts on two sides of the rotor assembly, and the balance weight pieces are located in the balance weight containing cavities.

The application is further provided with a plurality of groups of induction coils which are distributed and fixed on the side wall of the counterweight containing cavity in an annular shape, a plurality of movable magnetic assemblies which comprise a plurality of permanent magnets are fixed on the moving shaft at positions corresponding to the plurality of groups of induction coils to form the counterweight piece, and the induction coils and the movable magnetic assemblies form an induction power generation assembly.

The elastic piece is further provided with a spiral compression spring, the spiral compression spring is arranged on two sides of the rotor assembly, one end of the spiral compression spring abuts against the rotor assembly, and the other end of the spiral compression spring abuts against the base assembly.

The elastic piece is further arranged by the application, the elastic piece is formed by a flat spring, the whole flat spring is in a circular plate shape, a plurality of arc-shaped through grooves which are gradually extended from the middle part to the outer edge are uniformly distributed on the flat spring, the center is provided with a shaft hole, the two ends of the rotor assembly are respectively and fixedly matched with the shaft hole of the flat spring through a moving shaft, and the flat spring is fixedly arranged in the spring accommodating cavity through the periphery, so that the rotor assembly is axially and movably arranged in the base assembly.

Another object of the present application is to provide a reciprocating permanent magnet linear motor driven high thrust compressor that addresses the deficiencies of the prior art.

To achieve the above object, the present application provides a high thrust reciprocating permanent magnet linear motor compressor, comprising the high thrust reciprocating permanent magnet linear motor according to any one of claims 1 to 8, characterized in that: the device is also provided with at least one group of compressor mechanism, the compressor mechanism comprises a cylinder body, a piston and a piston rod, and the cylinder body is provided with an air inlet and an air outlet; the compressor mechanism is coaxially and fixedly arranged at the end part of the high-thrust reciprocating permanent magnet linear motor, a piston rod of the compressor mechanism is axially and in linkage connection with a moving shaft of the high-thrust reciprocating permanent magnet linear motor, and the piston rod form a part of a rotor assembly.

The application further provides two groups of compressor mechanisms, the two groups of compressor mechanisms are coaxially and oppositely arranged at two ends of the high-thrust reciprocating permanent magnet linear motor, piston rods of the two groups of compressor mechanisms are respectively connected with two ends of a moving shaft of the high-thrust reciprocating permanent magnet linear motor in an axial linkage manner, and the elastic piece, the rotor assembly, the two groups of pistons and the piston rods form the elastic system.

As a further arrangement of the application, the cylinder body is provided with an air inlet and an air outlet at two ends along the movement direction of the piston.

The application is further described below with reference to the accompanying drawings and specific examples.

It should be noted that, in the specification and claims of the present application, the terms "comprising" and "having" and any variations thereof are intended to cover nonexclusive inclusion, and the terms "upper", "lower", "inner", "outer", "middle", etc. indicate orientations or positional relationships, and are based on the orientations or positional relationships shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Drawings

FIG. 1 is a schematic view showing the perspective structure of the external appearance of embodiment 1 of the present application;

FIG. 2 is a front view of embodiment 1 of the present application;

FIG. 3 is a cross-sectional view of the structure of FIG. 2 A-A;

FIG. 4 is a schematic perspective view of a stator assembly and a rotor assembly according to embodiment 2 of the present application;

FIG. 5 is a cross-sectional view showing the internal structure of embodiment 3 of the present application;

FIG. 6 is a partially exploded perspective view of embodiment 3 of the present application;

FIG. 7 is a schematic view showing a perspective view of an embodiment of a mover assembly according to the present application;

FIG. 8 is a front view of an embodiment of a mover assembly of the present application;

FIG. 9 is a cross-sectional view of the structure of FIG. 8B-B;

FIG. 10 is a schematic cross-sectional view of an embodiment of a magnet holder according to the present application;

FIG. 11 is a schematic view showing the perspective structure of the embodiment 4 of the present application;

FIG. 12 is a front view of embodiment 4 of the present application;

FIG. 13 is a cross-sectional view of the structure of FIG. 12C-C;

FIG. 14 is a partially exploded view of embodiment 4 of the present application;

FIG. 15 is a second partial exploded view of embodiment 4 of the present application;

FIG. 16 is a partially exploded view of a third embodiment of the application in accordance with embodiment 4;

FIG. 17 is a partially exploded view of embodiment 4 of the present application;

FIG. 18 is a schematic view showing a perspective view of a left frame according to an embodiment of the present application;

fig. 19 is a schematic view showing a perspective view of an embodiment of the stator assembly according to the present application.

Detailed Description

The high-thrust reciprocating permanent magnet linear motor comprises a stator assembly and a rotor assembly, wherein the stator assembly comprises at least one group of stator assemblies 1, the rotor assembly comprises a moving shaft 3 and at least one group of rotor assemblies 2, the rotor assemblies 2 are fixed on the moving shaft 3, the stator assemblies 1 are arranged opposite to the rotor assemblies 2, permanent magnets 201 are arranged on the rotor assemblies 2 at positions corresponding to the stator assemblies 1, and the rotor assemblies are axially and reciprocally slidably arranged. The high-thrust reciprocating permanent magnet linear motor is also provided with an axial elastic piece 4, the elastic piece 4 and the rotor assembly form an elastic system, the elastic piece 4 enables the rotor assembly to have an elastic damping force opposite to the motion direction of the rotor assembly, the rotor assembly comprises a counterweight structure for matching the total mass, and the counterweight structure comprises one or more of adding a counterweight piece 5, enlarging the whole or partial size of a part, or adding a material with high specific gravity (namely adopting the specific gravity greater than that of a material conventionally used for the part, namely a main stream material) so as to weight the rotor assembly to a proper weight.

The number of the stator assemblies 1 and the rotor assemblies 2 of the high-thrust reciprocating permanent magnet linear motor can be determined according to the technical indexes of specific designs, and the specific structures of the stator assemblies and the rotor assemblies can be determined according to the number of the stator assemblies 1 and the rotor assemblies 2. When the number of the stator assemblies 1 and the mover assemblies 2 is small, such as in the case of only one group, the mover assemblies 2 may be fixed on the moving shaft 3, and the stator assemblies 1 are fixedly disposed at one side of the mover assemblies 2; in the case of two groups, the rotor assemblies 2 can be symmetrically fixed on two sides of the moving shaft 3, and the stator assemblies 1 are opposite to the rotor assemblies 2 and symmetrically fixed on the outer sides of the rotor assemblies 2 on two sides; when three or more groups of stator assemblies 1 and rotor assemblies 2 are arranged, the plurality of groups of rotor assemblies 2 are preferably distributed and fixed on the moving shaft 3 in an annular shape, and the plurality of groups of stator assemblies 1 are distributed and fixed around the plurality of groups of rotor assemblies 2 in an annular shape.

The application will be further described with reference to preferred embodiments and the accompanying drawings:

specific example 1: as shown in fig. 1-3, in this specific embodiment, the high-thrust reciprocating permanent magnet linear motor includes a stator assembly and a rotor assembly, wherein the stator assembly includes four groups of stator components 1, and the rotor assembly includes a moving shaft 3 and four groups of rotor components 2. The moving shaft 3 is a stepped shaft rod-shaped member provided with a plurality of shoulder steps, the shoulder steps are used for limiting, the stator assembly 1 is composed of an E-shaped iron core 101 and an exciting coil 102, as shown in fig. 7-10, the rotor assembly 2 is composed of permanent magnets 201 and magnet seats 202, the permanent magnets 201 are fixed on the magnet seats 202 and then distributed and fixed on the moving shaft 3 in an annular mode, and the magnet seats 202 between the groups can be mutually arranged in a split mode or can be integrally arranged. In this embodiment, the whole magnet holder 202 is a cylindrical structure, two circles of eight magnet cavities 203 are arranged in the side wall of the magnet holder 202 at intervals, the permanent magnets 201 are fixedly arranged in the magnet cavities 203, the eight magnet cavities 203 and the permanent magnets 201 are uniformly distributed along the circumference to form four pairs of four groups of rotor assemblies 2, the central holes of the magnet holder 202 are matched with the moving shaft 3, and the four groups of rotor assemblies 2 are fixedly arranged on the moving shaft 3 in a matching manner through the central holes of the magnet holder 202 and the moving shaft 3.

In order to facilitate installation, the high-thrust reciprocating permanent magnet linear motor is further provided with a base component 6, a stator containing cavity 604 is arranged in the base component 6, spring containing cavities 603 are symmetrically arranged on two sides of the stator containing cavity 604, shaft holes are formed in the centers of the stator containing cavity 604 and the spring containing cavity 603 to be communicated, the stator assembly is arranged in the stator containing cavity 604, and the elastic piece 4 is arranged in the spring containing cavity 603. The specific shape of the stator pockets 604 and spring pockets 603 may be set according to the specific shape of the stator assembly and the elastic member 4.

In this embodiment, the stand assembly 6 includes a left stand 601 and a right stand 602, where the left stand 601 and the right stand 602 are hollow cylindrical structures, and an inner cavity forms the spring accommodating cavity 603; for easy manufacture and assembly, the left stand 601 and the right stand 602 may each comprise a flange, an annular base and an end cover.

The left machine seat 601 and the right machine seat 602 are oppositely arranged at intervals and with end faces sleeved on the rotor assembly and positioned at two sides of the rotor assembly 2, a space between the end faces of the left machine seat 601 and the right machine seat 602 forms a stator accommodating cavity 604, and four groups of stator assemblies 1 of the stator assembly are uniformly distributed and fixedly clamped between the end faces of the left machine seat 601 and the right machine seat 602 in a ring shape around the four groups of rotor assemblies 2. In order to facilitate accurate positioning, in this embodiment, as shown in fig. 19, positioning ribs 1011 are disposed on two side walls of the E-shaped iron core 101 of the stator assembly 1 opposite to the end surfaces of the left stand 601 and the right stand 602, as shown in fig. 18, corresponding positioning grooves 605 are disposed on the end surfaces of the left stand 601 and the right stand 602 at positions corresponding to the positioning ribs 1011 (or vice versa), and the four groups of stator assemblies 1 are accurately disposed between the end surfaces of the left stand 601 and the right stand 602 by matching the positioning ribs 1011 with the positioning grooves 605. By the arrangement, the assembly of the equipment can be simplified, the use of materials is reduced, and the overall weight of the equipment is reduced.

In the high-thrust reciprocating permanent magnet linear motor, in order to realize the purpose of counterweight, the movable shaft 3 can be directly made of a metal material with the specific gravity greater than that of steel, or other material blocks with the specific gravity greater than that of the main body material of the movable shaft 3 are embedded in the movable shaft 3, and the purpose of adjusting the weight can be realized by additionally and wholly or partially thickening the diameter of the movable shaft 3 under the condition that the diameter of the movable shaft 3 meets the required mechanical strength.

In this embodiment, the counterweight 5 is symmetrically and fixedly arranged on the moving shaft 3 at two sides of the mover assembly 2, the shape of the counterweight 5 is preferably a regular shape symmetrical about a center, the center of gravity falls on a central shaft, such as a homogeneous disc (as shown in fig. 2) or a cone, the left stand 601 and the right stand 602 are both provided with a counterweight cavity 606, the counterweight 5 is movably located in the counterweight cavity 606 along the axial direction of the moving shaft 3, and the counterweight cavity 606 and the spring cavity 603 may be connected into one cavity.

In this embodiment, the elastic member 4 is formed of a coil compression spring, and a pair of elastic members are provided. The spiral compression springs are respectively arranged at two sides of the rotor assembly 2, specifically, the spiral compression springs are sleeved on the movable shaft 3 of the counterweight 5 opposite to the outer side of the rotor assembly 2 in a clearance fit manner, one ends of a pair of spiral compression springs are abutted against the counterweight 5 (or the shoulder of the movable shaft 3) of the rotor assembly, and the other ends of the spiral compression springs are respectively abutted against the base assembly 6 (the left base 601 and the right base 602). The elastic member 4 may also consist of a plurality of pairs of helical compression springs, which are evenly distributed around the axis 3, typically 3-6 pairs being preferred. The paired helical compression springs are respectively arranged at two sides of the rotor assembly 2 (along the axial direction of the movable shaft 3), one end of each helical compression spring is positioned and abutted against the base assembly 6 or fixedly arranged, and the other end of each helical compression spring is positioned and abutted against the rotor assembly.

Specific example 2: as another embodiment of the present application, the elastic member 4 may be constituted by a flat spring. The flat spring is integrally in a circular plate shape, a plurality of arc-shaped through grooves which are gradually extended from the middle part to the outer edge are uniformly distributed on the flat spring, and a shaft hole is formed in the center of the flat spring. In this embodiment, a pair of flat springs is also provided, the flat springs may be disposed between the mover assembly 2 and the counterweight 5, or may be disposed between the counterweight 5 and the outer ends of the left stand 601 and the right stand 602, the counterweight 5 is conical (as shown in fig. 4), two ends of the mover assembly through the moving shaft 3 are respectively and fixedly engaged with the shaft holes of the flat springs, the flat springs are fixedly disposed in the spring accommodating cavity 603 through the periphery, so that the mover assembly is axially movably disposed in the stand assembly 6, and two ends of the moving shaft 3 extend from the outer end surfaces of the left stand 601 and the right stand 602. The centers of the end surfaces of the outer side ends of the left stand 601 and the right stand 602 can be also provided with shaft sleeves matched with the moving shaft 3, so that better support and accurate guide of the rotor assembly are achieved.

Specific example 3: as still another specific embodiment of the present application, as shown in fig. 5 and 6, based on the above structures of the various high-thrust reciprocating permanent magnet linear motors, a plurality of groups of induction coils 7 may be fixedly disposed on the side wall of the counterweight accommodating cavity 606 in a ring shape, and a plurality of moving magnetic assemblies 8 including a plurality of permanent magnets 201 are fixedly disposed on the moving shaft 3 at positions corresponding to the plurality of groups of induction coils 7, where the induction coils 7 and the moving magnetic assemblies 8 form an induction power generation assembly. I.e. the induction coil 7 serves both as a counterweight 5 and as one of the induction generating components. Through the arrangement, the induction coil 7 and the movable magnetic assembly 8 form an induction power generation assembly, and the induction power generation assembly can generate power when the high-thrust reciprocating permanent magnet linear motor works, so that the working efficiency of the equipment is improved, and the energy consumption is reduced.

The application provides a high-thrust reciprocating permanent magnet linear motor and a high-thrust compressor driven by the reciprocating permanent magnet linear motor. The following is a preferred embodiment.

The high thrust reciprocating permanent magnet linear motor compressor of the present application comprises a high thrust reciprocating permanent magnet linear motor as described in any one of the preceding claims, and a set of compressor mechanisms 9. The compressor mechanism 9 comprises a cylinder 901, a piston 902 and a piston rod 903, wherein an air inlet 9011 and an air outlet 9012 are arranged on the cylinder 901; the compressor mechanism 9 is coaxially and fixedly arranged at one side end of the high-thrust reciprocating permanent magnet linear motor and fixedly connected with one end (the left stand 601 or the right stand 602) of the stand component 6, a piston rod 903 of the compressor mechanism 9 is axially and cooperatively connected with a moving shaft 3 of the high-thrust reciprocating permanent magnet linear motor, the piston rod 903 is overlapped with a central shaft 3, and the piston 902 and the piston rod 903 form a part of a rotor assembly.

Specific example 4: as shown in fig. 11-17, the high thrust reciprocating permanent magnet linear motor compressor of the present application may also be provided in the form of a dual compressor to improve compression efficiency. Specifically, the high-thrust reciprocating permanent magnet linear motor compressor includes the high-thrust reciprocating permanent magnet linear motor of any one of the foregoing, and two sets of compressor mechanisms 9. The compressor mechanism 9 comprises a cylinder 901, a piston 902 and a piston rod 903, wherein an air inlet 9011 and an air outlet 9012 are arranged on the cylinder 901; the two groups of compressor mechanisms 9 are respectively and coaxially fixedly arranged at the two side end parts of the high-thrust reciprocating permanent magnet linear motor, and are fixedly connected with the end parts of the two ends (the left stand 601 and the right stand 602) of the stand component 6, the piston rods 903 of the compressor mechanisms 9 are axially connected with the moving shaft 3 of the high-thrust reciprocating permanent magnet linear motor in a linkage manner, the piston rods 903 are overlapped with the central shaft 3, and the two groups of pistons 902 and the piston rods 903 form a part of a rotor assembly.

As shown in fig. 13, in the above embodiment, an air inlet 9011 and an air outlet 9012 may be provided on the cylinder 901 at both ends in the moving direction of the piston 902, respectively, and the piston 902 may reciprocate in the middle of the cylinder 901. Through the arrangement, in the working process of the compressor, the piston 902 moves back and forth to perform air inlet and air exhaust, so that the efficiency of the compressor is further improved.

In the above-mentioned specific embodiment of the high-thrust reciprocating permanent magnet linear motor compressor, the counterweight structure can achieve the purpose by adding one or more of the counterweight 5 on the moving shaft 3 or the rotor assembly 1, enlarging the whole or partial size of the component, and adding high-specific gravity materials, and can also achieve the purpose of adjusting the total mass of the rotor assembly by independently adopting the mode of manufacturing the piston 902 and/or the piston rod 903 by adopting the high-specific gravity materials with the specific gravity higher than that of the aluminum alloy materials commonly used for the piston 902 and the piston rod 903, or combining the modes on the basis.

The above examples are given for clarity of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the application.

Claims (12)

1. The utility model provides a high thrust reciprocating type permanent magnet linear motor, includes stator assembly and rotor assembly, the stator assembly includes at least a set of stator module, the rotor assembly includes movable shaft and at least a set of rotor subassembly, the rotor subassembly is fixed on the movable shaft, the stator module with the rotor subassembly sets up relatively, on the rotor subassembly with the corresponding position of stator module is equipped with the permanent magnet, rotor assembly axial reciprocal slidable sets up its characterized in that: the high-thrust reciprocating permanent magnet linear motor is characterized in that an axial elastic piece is further arranged in the high-thrust reciprocating permanent magnet linear motor, the elastic piece and the rotor assembly form an elastic system, the elastic piece enables the rotor assembly to have an elastic damping force opposite to the motion direction of the rotor assembly, the rotor assembly comprises a counterweight structure for matching with the total mass, and the counterweight structure comprises one or more of a counterweight piece, a whole or partial size of a part or a high specific gravity material mode.

2. The high thrust reciprocating permanent magnet linear motor of claim 1, wherein: the linear motor is provided with a plurality of groups of rotor assemblies and a plurality of groups of stator assemblies, the plurality of groups of rotor assemblies are distributed and fixed on the moving shaft in an annular mode, and the plurality of groups of stator assemblies are distributed and fixed around the plurality of groups of rotor assemblies in an annular mode.

3. The high thrust reciprocating permanent magnet linear motor of claim 2, wherein: the stator assembly is arranged in the stator accommodating cavity, spring accommodating cavities are symmetrically arranged on two sides of the stator accommodating cavity, shaft holes are formed in the centers of the stator accommodating cavity and the spring accommodating cavity to be communicated, the stator assembly is arranged in the stator accommodating cavity, and the elastic piece is arranged in the spring accommodating cavity.

4. A high thrust reciprocating permanent magnet linear motor according to claim 3, characterized in that: the machine seat assembly comprises a left machine seat and a right machine seat, the left machine seat and the right machine seat are of hollow cylindrical structures, and the inner cavity forms the spring containing cavity; the left stand and the right stand are arranged at intervals and with opposite end surfaces, the space between the end surfaces of the left stand and the right stand forms the stator accommodating cavity, and the stator assembly is clamped between the end surfaces of the left stand and the right stand; the balance weight containing cavities are formed in the left machine base and the right machine base, balance weight pieces are symmetrically and fixedly arranged on moving shafts on two sides of the rotor assembly, and the balance weight pieces are located in the balance weight containing cavities.

5. The high thrust reciprocating permanent magnet linear motor of claim 4, wherein: the elastic piece is composed of spiral compression springs, the spiral compression springs are arranged on two sides of the rotor assembly, one end of each spiral compression spring abuts against the rotor assembly, and the other end of each spiral compression spring abuts against the base assembly.

6. The high thrust reciprocating permanent magnet linear motor of claim 5, wherein: the counterweight is characterized in that a plurality of groups of induction coils are fixedly distributed on the side wall of the counterweight accommodating cavity in an annular mode, a plurality of movable magnetic assemblies comprising a plurality of permanent magnets are fixedly arranged on the moving shaft corresponding to the plurality of groups of induction coils to form the counterweight, and the induction coils and the movable magnetic assemblies form an induction power generation assembly.

7. The high thrust reciprocating permanent magnet linear motor of claim 4, wherein: the elastic piece is composed of a flat spring, the whole flat spring is in a circular plate shape, a plurality of arc-shaped through grooves which are gradually extended from the middle part to the outer edge are uniformly distributed on the flat spring, a shaft hole is formed in the center of the flat spring, the rotor assembly is respectively and fixedly matched with the shaft hole of the flat spring through two ends of the moving shaft, and the flat spring is fixedly arranged in the spring accommodating cavity through the periphery, so that the rotor assembly is axially and movably arranged in the base assembly.

8. The high thrust reciprocating permanent magnet linear motor of claim 7, wherein: the counterweight is characterized in that a plurality of groups of induction coils are fixedly distributed on the side wall of the counterweight accommodating cavity in an annular mode, a plurality of movable magnetic assemblies comprising a plurality of permanent magnets are fixedly arranged on the moving shaft corresponding to the plurality of groups of induction coils to form the counterweight, and the induction coils and the movable magnetic assemblies form an induction power generation assembly.

9. A high thrust reciprocating permanent magnet linear motor compressor comprising the high thrust reciprocating permanent magnet linear motor according to any one of claims 1-8, characterized in that: the device is also provided with at least one group of compressor mechanism, the compressor mechanism comprises a cylinder body, a piston and a piston rod, and the cylinder body is provided with an air inlet and an air outlet; the compressor mechanism is coaxially and fixedly arranged at the end part of the high-thrust reciprocating permanent magnet linear motor, a piston rod of the compressor mechanism is axially and in linkage connection with a moving shaft of the high-thrust reciprocating permanent magnet linear motor, and the piston rod form a part of a rotor assembly.

10. The high thrust reciprocating permanent magnet linear motor compressor of claim 9, wherein: the two groups of compressor mechanisms are coaxially and oppositely arranged at two ends of the high-thrust reciprocating permanent magnet linear motor, piston rods of the two groups of compressor mechanisms are respectively connected with two ends of a moving shaft of the high-thrust reciprocating permanent magnet linear motor in an axial linkage mode, and the elastic piece, the rotor assembly, the two groups of pistons and the piston rods form the elastic system.

11. The high thrust reciprocating permanent magnet linear motor compressor of claim 10, wherein: and the two ends of the cylinder body along the movement direction of the piston are respectively provided with an air inlet and an air outlet.

12. The high thrust reciprocating permanent magnet linear motor compressor of claim 9, wherein: and the two ends of the cylinder body along the movement direction of the piston are respectively provided with an air inlet and an air outlet.