Novel high-frequency linear motor and high-frequency compression pump

Abstract

The utility model belongs to the technical field of motors, and discloses a novel high-frequency linear motor and a high-frequency compression pump, the motor comprises a stator assembly and a moving iron rotor, a linear track is arranged in the stator assembly, the moving iron rotor is matched with the linear track, and the moving iron rotor can reciprocate within the range of the linear track; wherein the stator assembly comprises a coil unit, a magnetic block unit, a magnetic conduction unit and a structural unit, the structural unit forms a linear track, the coil unit, the magnetic block unit and the magnetic conduction unit are installed on the structural unit, and the part, matched with the coil unit, the magnetic block unit and the magnetic conduction unit, of the moving iron rotor is a magnetizer. The magnetic conductive unit guides the magnetic block unit and the coil unit to generate an orthogonal magnetic field, and the moving iron rotor (1) reciprocates under the action of the orthogonal magnetic field. According to the motor structure, the magnetic circuit principle of a linear motor can be kept unchanged, and the mounting position of the permanent magnet is changed; and the stability and reliability of the motor during high-frequency operation are ensured. As the stator part is static and the moving iron rotor reciprocates, the reliability and stability of the magnetic block bonding process are ensured, the magnetic blocks are effectively prevented from falling off in the high-frequency motion of the linear motor, the difficulty of magnet bonding is greatly reduced, and the permanent magnet bonding manufacturability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and relates to a linear motor, specifically a novel high-frequency linear motor and a high-frequency compression pump. Background Technology

[0002] A linear motor is a type of electric motor that generates linear motion through electromagnetic force. Unlike traditional rotary motors, the rotating parts of a linear motor move linearly, making it suitable for applications requiring linear motion, such as high-speed trains, elevators, and industrial machinery. A linear motor typically consists of a stator and moving parts. An electric current generates an electromagnetic force between the stator and the moving parts, thereby driving the moving parts to achieve linear motion.

[0003] Conventional linear motors have the moving parts located in the center of the stator, which consists of coils and a coil frame. Magnets or steel bars are glued or mounted on the moving parts, i.e., the rotor. These magnets are of the same polarity and have strong repulsive forces, making them difficult to attach. However, some linear motors requiring high-frequency, small-amplitude movements have very high-frequency moving parts that reciprocate within the stator. This high-frequency movement can easily cause the magnets or steel bars on the moving parts to detach, damaging the motor. Furthermore, if the linear motor is made very small, installing and fixing magnets on the moving parts becomes extremely difficult and cumbersome. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a novel high-frequency linear motor. By designing the magnetic blocks near the stator coils, installation is facilitated, increasing the reliability of their adhesion. Furthermore, the moving parts utilize magnetic rings to realize the magnetic circuit channel principle of the linear motor, ensuring its high-frequency stability.

[0005] The technical solution of this utility model is as follows:

[0006] A novel high-frequency linear motor includes a stator assembly and a moving iron rotor. The stator assembly has a linear track inside, and the moving iron rotor cooperates with the linear track, enabling the moving iron rotor to reciprocate within the range of the linear track. The stator assembly includes a coil unit, a magnetic block unit, a magnetic guiding unit, and a structural unit. The structural unit forms the linear track, and the coil unit, magnetic block unit, and magnetic guiding unit are mounted on the structural unit. The part of the moving iron rotor that cooperates with the coil unit, magnetic block unit, and magnetic guiding unit is a magnetic guide. The magnetic guiding unit guides the magnetic block unit and the coil unit to generate an orthogonal magnetic field, which causes the moving iron rotor to reciprocate.

[0007] Furthermore, the structural unit includes a front cover, a coil support, and a rear cover, with the coil support fixed between the front cover and the rear cover.

[0008] Furthermore, the coil unit includes a coil winding wound on the central section of the coil support.

[0009] Furthermore, the magnetic block unit includes a front magnetic block group and a rear magnetic block group, both of which are fixed on the coil support. Specifically, the front magnetic block group is fixed at the front end of the coil winding, and the rear magnetic block group is fixed at the rear end of the coil winding.

[0010] Furthermore, the front and rear magnetic block groups have the same polar orientation.

[0011] Furthermore, the magnetic guiding unit includes a front magnetic guiding ring, a middle magnetic guiding ring, and a rear magnetic guiding ring; the front magnetic guiding ring and the rear magnetic guiding ring are mounted on the coil support, wherein the front magnetic guiding ring is located in front of the front magnetic block group, and the rear magnetic guiding ring is located behind the rear magnetic block group; the cylindrical middle magnetic guiding ring is located between the outer ring surfaces of the front end cover and the rear end cover, and the inner diameter of the middle magnetic guiding ring covers the entire coil support.

[0012] Furthermore, a guide post is provided on one end of the inner side of the rear end cover as part of the linear track. The rear end of the moving iron rotor is provided with a blind hole that matches the guide post. The moving iron rotor and the rear end cover are connected by the guide post and the blind hole to complete the radial positioning of the moving iron rotor on the linear track. An elastic support is provided between the bottom of the blind hole and the end of the guide post. The other part of the linear track is the mutual matching between the inner diameter of the front end cover and the outer diameter of the moving iron rotor.

[0013] A high-frequency compression pump includes a novel high-frequency linear motor as described above, with the front end of the moving iron rotor extending out of the front end cover; two high-frequency linear motors are arranged coaxially opposite each other, and a medium cavity is provided between the two high-frequency linear motors.

[0014] A high-frequency Stirling refrigerator linear motor includes the aforementioned novel high-frequency linear motor, with the front end of the moving iron rotor extending out of the front end cover; two high-frequency linear motors are arranged coaxially opposite each other, and a medium cavity is provided between the two high-frequency linear motors.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. The motor structure of this utility model can maintain the magnetic circuit principle of the linear motor and change the installation position of the permanent magnet; it ensures that when the motor is running at high frequency, the stator part does not move, only the moving iron rotor moves, thus ensuring the stability of the magnetic block and effectively preventing the magnetic block from falling off during the high-frequency movement of the linear motor. At the same time, it greatly reduces the difficulty of pasting the magnet and improves the bonding process of the permanent magnet.

[0017] 2. Due to the small size of the moving iron rotor, it was originally difficult to attach several magnets with opposite magnetic properties to the moving iron rotor, requiring the magnets to be attached in a very small installation space. This invention designs the magnets on both sides of the two retaining rings of the coil frame, which greatly increases the installation space compared to the original design, significantly reducing the difficulty of attaching the magnets.

[0018] 3. The high-frequency compression pump and the high-frequency Stirling refrigerator linear motor of this utility model have the characteristics of long service life and stable compression effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model patent, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model patent, and therefore should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the magnetic circuit of this utility model;

[0022] Among them, 1—moving iron rotor, 2—front end cover, 3—coil frame, 4—rear end cover, 5—coil winding, 6—front magnetic block group, 7—rear magnetic block group, 8—front magnetic ring, 9—middle magnetic ring, 10—rear magnetic ring, 11—elastic support. Detailed Implementation

[0023] This section describes embodiments of the present invention, used to explain and illustrate the technical solutions of the present invention. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are for the purpose of facilitating and simplifying the description of this utility model, and do not indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include more than one of those features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1:

[0027] A novel high-frequency linear motor includes a stator assembly and a moving iron rotor 1. The stator assembly has a linear track inside, and the moving iron rotor 1 cooperates with the linear track, enabling the moving iron rotor 1 to reciprocate within the range of the linear track. The stator assembly includes a coil unit, a magnetic block unit, a magnetic guiding unit, and a structural unit. The structural unit forms the linear track, and the coil unit, magnetic block unit, and magnetic guiding unit are mounted on the structural unit. The part of the moving iron rotor 1 that cooperates with the coil unit, magnetic block unit, and magnetic guiding unit is a magnetic guide. The magnetic guiding unit guides the magnetic block unit and the coil unit to generate an orthogonal magnetic field, which causes the moving iron rotor 1 to reciprocate.

[0028] The structural unit includes a front cover 2, a coil support 3, and a rear cover 4, with the coil support 3 fixed between the front cover 2 and the rear cover 4.

[0029] The coil unit includes a coil winding 5, which is wound around the center section of the coil support 3.

[0030] The magnetic block unit includes a front magnetic block group 6 and a rear magnetic block group 7. Both the front magnetic block group 6 and the rear magnetic block group 7 are fixed on the coil support 3. Specifically, the front magnetic block group 6 is fixed at the front end of the coil winding 5, and the rear magnetic block group 7 is fixed at the rear end of the coil winding 5.

[0031] The front magnetic block group 6 and the rear magnetic block group 7 have the same polar orientation.

[0032] The magnetic guiding unit includes a front magnetic guiding ring 8, a middle magnetic guiding ring 9, and a rear magnetic guiding ring 10; the front magnetic guiding ring 8 and the rear magnetic guiding ring 10 are mounted on the coil support 3, wherein the front magnetic guiding ring 8 is located in front of the front magnetic block group 6, and the rear magnetic guiding ring 10 is located behind the rear magnetic block group 7; the cylindrical middle magnetic guiding ring 9 is located between the outer ring surfaces of the front end cover 2 and the rear end cover 4, and the inner diameter of the middle magnetic guiding ring 9 covers the entire coil support 3.

[0033] The rear end cover 4 has a guide post at one end as a linear track. The rear end of the moving iron rotor 1 has a blind hole that matches the guide post. The moving iron rotor 1 and the rear end cover 4 are fixed on the linear track by the cooperation of the guide post and the blind hole. An elastic support 11 is provided between the bottom of the blind hole and the end of the guide post.

[0034] In this embodiment, as Figure 1 As shown, the inner circular surface of the front cover 2 is also provided with a first cylindrical wall extending rearward, and similarly, the outer circular surface of the rear end of the moving iron rotor 1 is also provided with a second cylindrical wall extending forward. The cylindrical wall of the front cover 2 and the coil frame 3 form an annular cavity, and the second cylindrical wall of the moving iron rotor 1 extends rearward and is located in the annular cavity, so that the front cover 2 and the moving iron rotor 1 form an interlocking fit. The inner diameter of the first cylindrical wall of the front cover 2 matches the outer diameter of the moving iron rotor 1 excluding the second cylindrical wall.

[0035] A high-frequency compression pump includes a novel high-frequency linear motor as described above, with the front end of the moving iron rotor 1 extending out of the front end cover 2; two high-frequency linear motors are arranged coaxially opposite each other, and a medium cavity is provided between the two high-frequency linear motors.

[0036] Example 2:

[0037] A novel high-frequency linear motor includes a stator and a rotor. The rotor is a linearly moving iron rotor 1. The stator includes a coil support and a coil winding. Two retaining rings are respectively located on both sides of the middle section of the coil support. The coil winding is located between the two retaining rings of the coil support. Magnetic blocks are provided at both ends of the two retaining rings. Magnetic rings are provided at both ends of the coil support. The moving iron rotor 1 adopts a magnetic structure.

[0038] The magnetic ring of the coil support and the magnetic structure of the moving iron rotor 1 work together to guide the magnetic field generated by the coil winding and the magnetic block to form a closed path in the stator and rotor, and the magnetic field is symmetrically distributed.

[0039] The non-output end of the moving iron rotor 1 in the direction of movement is provided with an elastic support to provide elastic force to the moving iron rotor 1 and to realize position restoration.

[0040] The positions of the two retaining rings are symmetrical with respect to the center of the coil support, and the magnetic blocks on both sides of the retaining rings are symmetrical.

[0041] Two magnetic rings are respectively located at one end of the outer side of the two magnetic blocks.

[0042] The magnetic guiding structure of the moving iron rotor 1 is respectively set at the radial positions of the magnetic block and the magnetic guiding ring of the corresponding stator.

[0043] The linear motor also includes a cylindrical motor housing, inside which is a stator assembly that fits against the inner wall of the motor housing. The stator assembly includes a coil frame and various parts mounted on the coil frame.

[0044] The idea behind this invention is to move the position of the magnetic block to the stator and guide the distribution of the magnetic field through a magnetic ring to drive the stator to the moving iron rotor 1.

Claims

1. A novel high-frequency linear motor, characterized in that, The stator assembly includes a stator assembly and a moving iron rotor (1). The stator assembly has a linear track inside, and the moving iron rotor (1) cooperates with the linear track. The moving iron rotor (1) can reciprocate within the range of the linear track. The stator assembly includes a coil unit, a magnetic block unit, a magnetic guiding unit, and a structural unit. The structural unit forms the linear track. The coil unit, the magnetic block unit, and the magnetic guiding unit are mounted on the structural unit. The part of the moving iron rotor (1) that cooperates with the coil unit, the magnetic block unit, and the magnetic guiding unit is a magnetic guide. The magnetic guiding unit guides the magnetic block unit and the coil unit to generate an orthogonal magnetic field, which causes the moving iron rotor (1) to reciprocate under its action.

2. The novel high-frequency linear motor according to claim 1, characterized in that, The structural unit includes a front cover (2), a coil support (3) and a rear cover (4), with the coil support (3) fixed between the front cover (2) and the rear cover (4).

3. A novel high-frequency linear motor according to claim 2, characterized in that, The coil unit includes a coil winding (5), which is wound around the center section of the coil support (3).

4. A novel high-frequency linear motor according to claim 3, characterized in that, The magnetic block unit includes a front magnetic block group (6) and a rear magnetic block group (7). Both the front magnetic block group (6) and the rear magnetic block group (7) are fixed on the coil support (3). Specifically, the front magnetic block group (6) is fixed at the front end of the coil winding (5), and the rear magnetic block group (7) is fixed at the rear end of the coil winding (5).

5. A novel high-frequency linear motor according to claim 4, characterized in that, The front magnetic block group (6) and the rear magnetic block group (7) have the same polar orientation.

6. A novel high-frequency linear motor according to claim 4, characterized in that, The magnetic guiding unit includes a front magnetic ring (8), a middle magnetic ring (9), and a rear magnetic ring (10); the front magnetic ring (8) and the rear magnetic ring (10) are mounted on the coil support (3), wherein the front magnetic ring (8) is located in front of the front magnetic block group (6), and the rear magnetic ring (10) is located behind the rear magnetic block group (7); the cylindrical middle magnetic ring (9) is located between the outer ring surfaces of the front end cover (2) and the rear end cover (4), and the inner diameter of the middle magnetic ring (9) covers the entire coil support (3).

7. A novel high-frequency linear motor according to claim 2, characterized in that, The rear end cover (4) has a guide post at one end as part of the linear track. The rear end of the moving iron rotor (1) has a blind hole that matches the guide post. The moving iron rotor (1) and the rear end cover (4) are radially fixed on the linear track through the cooperation of the guide post and the blind hole. An elastic support (11) is provided between the bottom of the blind hole and the end of the guide post. The other part of the linear track is the mutual cooperation between the inner diameter of the front end cover (2) and the outer diameter of the moving iron rotor (1).

8. A high-frequency compression pump, comprising a novel high-frequency linear motor as described in any one of claims 1-7, wherein the front end of the moving iron rotor (1) extends out of the front end cover (2); two high-frequency linear motors are arranged coaxially opposite each other, and a medium cavity is provided between the two high-frequency linear motors.

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