A bearingless permanent magnet speed control system

Abstract

The invention discloses a bearingless permanent magnet speed regulation system, comprising a movable base, a motor, a cylindrical conductor rotor and a cylindrical permanent magnet rotor; the movable base also comprises an upper base plate, a slider, a guide rail, a lead screw nut, a lead screw and a lower base plate; the slider and the lead screw nut are arranged on the lower end surface of the upper base plate, and the motor is arranged on the upper end surface of the upper base plate; the guide rail and the lead screw are arranged on the upper end surface of the lower base plate, and the guide rail, the lead screw and the motor axis are parallel to each other; the slider cooperates with the guide rail, and the lead screw nut cooperates with the lead screw; the cylindrical conductor rotor is arranged on the axis of the motor; the cylindrical permanent magnet rotor and the cylindrical conductor rotor are concentrically sleeved and separated by an air gap; the cylindrical permanent magnet rotor is arranged on the axis of the load; the lead screw is driven to move by rotating the lead screw, and the lead screw nut drives the motor to move, and finally drives the cylindrical conductor rotor to move, thereby changing the meshing area of ​​the cylindrical conductor rotor and the cylindrical permanent magnet rotor, and realizing the regulation of the load speed. The invention has a simple structure, is convenient for transformation, has a low cost, and is suitable for popularization and use.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet speed regulation, and in particular to a bearingless permanent magnet speed regulation system. Background Art

[0002] Permanent magnet speed regulator is a device that uses magnetic force to achieve power transmission and speed regulation. It has the characteristics of simple structure, high reliability, and strong environmental adaptability. The permanent magnet speed regulator adjusts the magnetic field coupling area between the conductor rotor and the permanent magnet rotor through the adjustment mechanism, thereby changing the transmitted torque and speed. At present, there are two main problems with the use of permanent magnet speed regulators. First, the permanent magnet speed regulator contains bearings, which need regular maintenance and replacement, increasing the cost of the permanent magnet speed regulator; second, the permanent magnet speed regulator requires installation space. When used in energy-saving transformation projects, the original motor system needs to be fundamentally modified and the motor needs to be moved back. For some systems, there is even no installation space, which limits the use of permanent magnet speed regulators. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the prior art, such as high maintenance cost, large modification workload and long time of the existing permanent magnet speed regulator, and to provide a permanent magnet speed regulation system with simple structure, convenient maintenance and convenient modification.

[0004] The purpose of the present invention is to be solved by the following technical solutions:

[0005] A bearingless permanent magnet speed regulation system comprises a movable base, a motor, a cylindrical conductor rotor and a cylindrical permanent magnet rotor, and is characterized in that: the movable base also comprises an upper base plate, a slider, a guide rail, a lead screw nut, a lead screw and a lower base plate; the slider and the lead screw nut are arranged on the lower end surface of the upper base plate, and the motor is arranged on the upper end surface of the upper base plate; the guide rail and the lead screw are arranged on the upper end surface of the lower base plate, and the axes of the guide rail, the lead screw and the motor are parallel to each other; the slider cooperates with the guide rail, and the slider can drive the upper base plate to move smoothly along the guide rail; the lead screw nut cooperates with the lead screw, and rotating the lead screw can drive the lead screw nut to drive the upper base plate to move.

[0006] The cylindrical conductor rotor is concentrically arranged on the shaft of the motor and rotates synchronously with the motor; the cylindrical permanent magnet rotor is concentrically sleeved with the cylindrical conductor rotor and separated by an air gap; the cylindrical permanent magnet rotor is concentrically arranged on the shaft of the load; during operation, the axial position of the cylindrical permanent magnet rotor remains unchanged, and the lead screw nut is driven to move by rotating the lead screw, and the lead screw nut drives the upper base plate and the motor arranged on the upper base plate to move, and finally drives the cylindrical conductor rotor to move axially, thereby changing the meshing area between the cylindrical conductor rotor and the cylindrical permanent magnet rotor, and realizing the adjustment of the load speed.

[0007] The driver of the lead screw includes but is not limited to a servo motor and an electric actuator.

[0008] There are no less than 2 guide rails, and each guide rail is equipped with no less than 2 sliding blocks.

[0009] The range of axial movement of the motor is not less than the axial length of the cylindrical permanent magnet rotor.

[0010] The movable base also includes a support base A and a support base B. The support base A and the support base B are fixed to the lower base plate and are used to support the lead screw so that the lead screw can rotate around the axis.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The bearingless permanent magnet speed regulation system of the present invention realizes the change of the meshing area of ​​the cylindrical conductor rotor and the cylindrical permanent magnet rotor by moving the base, thereby changing the output speed and torque of the permanent magnet speed regulation system, canceling the commonly used adjustment mechanism, and having a simpler structure, higher reliability and lower cost; reducing the installation space, and being able to adapt to the transformation requirements of most systems; greatly reducing the transformation engineering volume and cost, and only needing to replace the motor base to complete the transformation. The whole system has a simple structure, high reliability, convenient transformation, low cost, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0014] Attached Figure 2 It is a schematic diagram of the three-dimensional structure of the upper base plate of the present invention;

[0015] Attached Figure 3 It is a schematic diagram of the three-dimensional structure of the lower base plate of the present invention;

[0016] Among them: 1-movable base; 11-upper base plate; 12-slider; 13-guide rail; 14-screw nut; 15-screw; 16-lower base plate; 17-support base A; 18-support base B; 2-motor; 3-cylindrical conductor rotor; 4-cylindrical permanent magnet rotor; 5-load; 6-driver. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figures 1 to 3 As shown, a bearingless permanent magnet speed regulation system comprises a movable base (1), a motor (2), a cylindrical conductor rotor (3) and a cylindrical permanent magnet rotor (4).

[0019] The movable base (1) also includes an upper base plate (11), a slider (12), a guide rail (13), a lead screw nut (14), a lead screw (15), and a lower base plate (16). The slider (12) and the lead screw nut (14) are arranged on the lower end surface of the upper base plate (11), and the motor (2) is arranged on the upper end surface of the upper base plate (11). The guide rail (13) and the lead screw (15) are arranged on the upper end surface of the lower base plate (16), and the guide rail (13) is not less than two. The movable base (1) also includes a support seat A (17) and a support seat B (18), and the support seat A (17) and the support seat B (18) are fixed on the lower base plate (16) and are used to support the lead screw (15) so that the lead screw (15) can rotate around the axis. The axes of the guide rail (13), the lead screw (15) and the motor (2) are parallel to each other. The slider (12) cooperates with the guide rail (13), and there are no less than two sliders (12) on each guide rail (13). The slider (12) can drive the upper base plate (11) to move smoothly along the guide rail (13). The range of axial movement of the motor (2) is not less than the axial length of the cylindrical permanent magnet rotor (4). The lead screw nut (14) cooperates with the lead screw (15), and rotating the lead screw (15) can drive the lead screw nut (14) to drive the upper base plate (11) to move. The lead screw (15) is driven to rotate by the driver (6), and the types of the driver (6) include but are not limited to servo motors and electric actuators.

[0020] The cylindrical conductor rotor (3) is concentrically arranged on the shaft of the motor (2) and rotates synchronously with the motor (2); the cylindrical permanent magnet rotor (4) is concentrically sleeved with the cylindrical conductor rotor (3) and separated by an air gap; the cylindrical permanent magnet rotor (4) is concentrically arranged on the shaft of the load (5).

[0021] During operation, the axial position of the cylindrical permanent magnet rotor (4) remains unchanged, and the lead screw (15) is rotated to drive the lead screw nut (14) to move, and the lead screw nut (14) drives the upper base plate (11) and the motor (2) arranged on the upper base plate (11) to move, and finally drives the cylindrical conductor rotor (3) to move axially, thereby changing the meshing area between the cylindrical conductor rotor (3) and the cylindrical permanent magnet rotor (4), and realizing the adjustment of the rotation speed of the load (5).

[0022] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention; any technology not involved in the present invention can be realized by existing technologies.

Claims

1. A bearingless permanent magnet speed regulation system, comprising a movable base (1), a motor (2), a cylindrical conductor rotor (3) and a cylindrical permanent magnet rotor (4), characterized in that: The movable base (1) further comprises an upper base plate (11), a slider (12), a guide rail (13), a lead screw nut (14), a lead screw (15), and a lower base plate (16); the slider (12) and the lead screw nut (14) are arranged on the lower end surface of the upper base plate (11), and the motor (2) is arranged on the upper end surface of the upper base plate (11); the guide rail (13) and the lead screw (15) are arranged on the upper end surface of the lower base plate (16), and the axes of the guide rail (13), the lead screw (15) and the motor (2) are parallel to each other; the slider (12) cooperates with the guide rail (13), and the slider (12) can drive the upper base plate (11) to move smoothly along the guide rail (13); the lead screw nut (14) cooperates with the lead screw (15), and the lead screw (15) can be rotated to drive the lead screw nut (14) to drive the upper base plate (11) to move; The cylindrical conductor rotor (3) is concentrically arranged on the shaft of the motor (2) and rotates synchronously with the motor (2); the cylindrical permanent magnet rotor (4) is concentrically sleeved with the cylindrical conductor rotor (3) and separated by an air gap; the cylindrical permanent magnet rotor (4) is concentrically arranged on the shaft of the load (5); during operation, the axial position of the cylindrical permanent magnet rotor (4) remains unchanged, and the lead screw (15) is driven to move the lead screw nut (14), and the lead screw nut (14) drives the upper base plate (11) and the motor (2) arranged on the upper base plate (11) to move, and finally drives the cylindrical conductor rotor (3) to move axially, thereby changing the meshing area between the cylindrical conductor rotor (3) and the cylindrical permanent magnet rotor (4), and realizing the adjustment of the speed of the load (5); the range of axial movement of the motor (2) is not less than the axial length of the cylindrical permanent magnet rotor (4).

2. A bearingless permanent magnet speed control system according to claim 1, characterized in that: The driver (6) of the lead screw (15) includes but is not limited to a servo motor and an electric actuator.

3. The bearingless permanent magnet speed regulation system according to claim 1 is characterized in that: There are no less than two guide rails (13), and no less than two sliding blocks (12) are matched on each guide rail (13).

4. The bearingless permanent magnet speed regulation system according to claim 1, characterized in that: The movable base (1) further comprises a support base A (17) and a support base B (18), wherein the support base A (17) and the support base B (18) are fixed on the lower base plate (16) and are used to support the lead screw (15) so that the lead screw (15) can rotate around the axis.

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