CN106849482A - Magnetic suspension motor and its method of work without thrust disc - Google Patents

Abstract

The invention discloses a magnetic levitation motor without a thrust disk and a working method thereof, and relates to the technical field of magnetic levitation motors. The magnetic levitation motor includes a working machine (1), a left protective bearing (2‑1), a left axial magnetic levitation bearing (3‑1), a left radial magnetic levitation bearing (4‑1), a high speed motor (5), a right radial Directional magnetic suspension bearing (4‑2), right axial magnetic suspension bearing (3‑2), right protective bearing (2‑2), rotor core shaft (6). The electromagnetic force between the radial magnetic suspension bearing and the radial magnetic conductive material (8), the electromagnetic force between the axial magnetic suspension bearing and the axial magnetic conductive material (7), and the radial and axial displacement of the rotor core shaft (6) Active control is carried out; the present invention omits the thrust plate (9), which is convenient for the assembly and cooling of the magnetic levitation motor, and the dynamic performance of the rotor meets the requirements of high-speed rotation.

Description

Magnetic levitation motor without thrust disc and its working method

technical field

The patent of the present invention relates to the technical field of magnetic levitation, in particular to the application field of a magnetic levitation motor.

Background technique

In the magnetic levitation motor structure, the traditional magnetic levitation motor structure includes a working machine (impeller or other load), left protective bearing, left radial magnetic levitation bearing, high-speed motor, left axial magnetic levitation bearing, thrust disc, right axial magnetic levitation bearing, right Radial magnetic suspension bearing, right protection bearing, rotor mandrel. The rotor core shaft is covered with a magnetic material at the corresponding position of the radial magnetic suspension bearing. The electromagnetic force between the magnetic material and the radial magnetic suspension bearing can actively control the radial displacement of the rotor core shaft. The electromagnetic force can actively control the axial displacement of the rotor core shaft. The diameter of the thrust disc is larger than that of the rotor of the radial magnetic suspension bearing, and the axial magnetic suspension bearings are distributed at both ends of the end face of the thrust disc.

In the traditional magnetic levitation motor, when air cooling is adopted, the cooling channel is along the axis of the rotor and is mainly used for cooling the permanent magnets. As shown by the arrow in Figure 2, the cooling medium passes through the left protective bearing, left radial magnetic levitation bearing, high-speed motor, Left axial magnetic suspension bearing, thrust disc, right axial magnetic suspension bearing, right radial magnetic suspension bearing, right protective bearing. Because the existence of the large-diameter thrust disc blocks the flow channel of the cooling medium, the temperature of the permanent magnet increases and it is easy to lose magnetism. And it is very inconvenient to assemble or disassemble the radial magnetic suspension bearing, the axial magnetic suspension bearing, the thrust disc, and the rotor core shaft.

Contents of the invention

Aiming at the disadvantages of the existing magnetic levitation motor structure, the present invention provides a magnetic levitation motor without a thrust disc and its working method, which can make the flow channel of the cooling medium smooth, have good cooling effect, and are convenient for disassembly and assembly.

The present invention is realized through the following measures:

A magnetic levitation motor without a thrust disc, comprising a working machine, a left protective bearing, a left axial magnetic levitation bearing, a left radial magnetic levitation bearing, a high-speed motor, a right radial magnetic levitation bearing, a right axial magnetic levitation bearing, a right protective bearing, and a rotor core shaft; the rotor mandrel is a symmetrical structure, which consists of the middle section, the second left section and the second right section located outside the middle section, the third left section and the third right section located outside the second left and right sections The high-speed motor is arranged in the middle section of the rotor mandrel, the left radial magnetic suspension bearing and the right radial magnetic suspension bearing are arranged in the middle section of the rotor mandrel and are respectively located on the left and right sides of the high-speed motor; the left axial magnetic suspension The bearing and the right axial magnetic suspension bearing are arranged in the second left section and the second right section of the rotor mandrel respectively; the left protective bearing and the right protective bearing are respectively installed in the third left section and the third right section of the rotor mandrel; The working machine is installed on one end of the rotor mandrel; the middle section of the rotor mandrel is covered with a radial magnetic material at the corresponding positions of the left radial magnetic suspension bearing and the right radial magnetic suspension bearing; the end face of the middle section of the rotor mandrel is Axial magnetically conductive materials are sleeved at corresponding positions of the left axial magnetic suspension bearing and the right axial magnetic suspension bearing.

The working method of the magnetic levitation motor without a thrust disc is characterized in that: the electromagnetic force between the radial magnetic levitation bearing and the radial magnetic material, the electromagnetic force between the axial magnetic levitation bearing and the axial magnetic material, and the rotor core shaft The radial and axial displacements are actively controlled; the cooling medium passes through the left axial magnetic suspension bearing, the left radial magnetic suspension bearing, the high-speed motor, the right radial magnetic suspension bearing, and the right axial magnetic suspension bearing in sequence, and the flow path is smooth.

Working principle of the present invention:

The middle section of the rotor mandrel is covered with radial magnetically conductive material at the corresponding position of the radial magnetic suspension bearing, and the end face is covered with axial magnetically conductive material. The end face of the middle section of the rotor mandrel can be used as the two end faces of the thrust disc. When the coil of the magnetic suspension bearing is energized, the electromagnetic force between the magnetic suspension bearing and the magnetic material can actively control the displacement of the rotor shaft no matter whether the rotor shaft is in a static levitation state or a high-speed rotation state. A high-speed motor controls the rotational speed of the rotor spindle. The protective bearing supports and protects the rotor core shaft when the radial magnetic suspension bearing and the axial magnetic suspension bearing are not working.

When the maglev motor is working, the cooling medium passes through the working machine, the left protective bearing, the left axial maglev bearing, the left radial maglev bearing, the high-speed motor, the right radial maglev bearing, the right axial maglev bearing, and the right protective bearing, as shown in Figure 1 As shown by the middle arrow, the flow path is smooth and the resistance is small, so the temperature rise of the permanent magnet is small and the cooling effect is good.

Beneficial effects of the present invention:

1. The end faces of the middle section of the rotor mandrel are covered with magnetically conductive materials, so the end faces at both ends of the middle section of the rotor mandrel can be used as the two end faces of the thrust disc, and the thrust disc is omitted.

2. The flow channel of the cooling medium is smooth and the resistance is small, so the temperature rise of the permanent magnet is small and the cooling effect is good, which solves the problem of permanent magnet loss of magnetism.

3. The axial magnetic suspension bearing is arranged outside the two radial magnetic suspension bearings, and there is no thrust disc, which is convenient for assembly.

Description of drawings

Figure 1 is a structural diagram of a magnetic levitation motor without a thrust disc;

Fig. 2 is a structural diagram of a traditional magnetic levitation motor;

Label names in the figure: 1 working machine, 2-1 left protective bearing, 2-2 right protective bearing, 3-1 left axial magnetic suspension bearing, 3-2 right axial magnetic suspension bearing, 4-1 left radial magnetic suspension bearing, 4-2 Right radial magnetic suspension bearing, 5 High-speed motor, 6 Rotor core shaft, 7-1 Left axial magnetically conductive material, 7-2 Right axial magnetically conductive material, 8-1 Left radial magnetically conductive material, 8-2 Right diameter Guide magnetic material, 9 thrust discs.

detailed description

The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

The invention discloses a magnetic levitation motor without a thrust disk and a working method thereof, and relates to the technical field of magnetic levitation motors. The magnetic suspension motor structure includes a working machine 1, a left protective bearing 2-1, a left axial magnetic suspension bearing 3-1, a left radial magnetic suspension bearing 4-1, a high-speed motor 5, a right radial magnetic suspension bearing 4-2, and a right axial magnetic suspension bearing 4-1. Magnetic suspension bearing 3-2, right protection bearing 2-2, rotor core shaft 6. The rotor mandrel 6 has a symmetrical structure, and it consists of a middle section, a second left section and a second right section located outside the middle section, and a third left section and a third right section located outside the second left and right sections. The high-speed motor 5 is arranged in the middle section of the rotor mandrel 6, and the left radial magnetic suspension bearing 4-1 and the right radial magnetic suspension bearing 4-2 are arranged in the middle section of the rotor mandrel 6 and are respectively located around the high-speed motor 5 On both sides; the left axial magnetic suspension bearing 3-1 and the right axial magnetic suspension bearing 3-2 are respectively arranged on the left second section and the right second section of the rotor core shaft 6; the left protective bearing 2-1, right The protective bearings 2-2 are respectively mounted on the third left segment and the third right segment of the rotor core shaft 6; the working machine 1 is mounted on one end of the rotor core shaft 6. The middle section of the rotor mandrel 6 is covered with a radial magnetically conductive material at the corresponding position of the radial magnetic suspension bearing, and the end surface is covered with an axial magnetically conductive material.

The high-speed motor 5 controls the rotational speed of the rotor core shaft 6 . The protection bearing supports and protects the rotor core shaft 6 when the radial magnetic suspension bearing and the axial magnetic suspension bearing are not working.

The structure is shown in Figure 1. When the coil of the radial magnetic suspension bearing is energized, the electromagnetic force between the radial magnetic suspension bearing and the radial magnetically permeable material actively controls the radial displacement of the rotor; when the coil of the axial magnetic suspension bearing 3 is energized, The electromagnetic force between the axial magnetic suspension bearing and the axial magnetically conductive material actively controls the axial displacement of the rotor. When the maglev motor is working, the cooling medium passes through the left axial maglev bearing 3-1, the left radial maglev bearing 4-1, the high-speed motor 5, the right radial maglev bearing 4-2, and the right axial maglev bearing 3-2, such as As shown by the arrow in Figure 1, the flow path is smooth and the resistance is small, so the temperature rise of the permanent magnet is small and the cooling effect is good. When assembling the magnetic levitation motor structure without thrust disc, the rotor can be assembled in sequence, the left protective bearing 2-1, the left axial magnetic levitation bearing 3-1, the left radial magnetic levitation bearing 4-1, the high-speed motor 5, and the right radial magnetic levitation bearing 4-2, right axial magnetic suspension bearing 3-2, right protection bearing 2-2. Compared with the traditional magnetic levitation motor structure, the assembly and disassembly are very convenient.

Claims (2)

1. a kind of magnetic suspension motor without thrust disc,

Including working machine（1）, left protection bearing（2-1）, left axial magnetic suspension bearing（3-1）, left radial magnetic bearing（4- 1）, high-speed electric expreess locomotive（5）, right radial magnetic bearing（4-2）, right axial magnetic suspension bearing（3-2）, right protection bearing（2-2）, turn Sub- mandrel（6）；

It is characterized in that：

The rotor mandrel（6）It is symmetrical structure, it is by interlude, left second segment, right second segment, position on the outside of interlude Left 3rd section, right 3rd section of composition on the outside of left and right second segment；

The high-speed electric expreess locomotive（5）It is arranged in rotor mandrel（6）Interlude, the left radial magnetic bearing（4-1）, right radial direction Magnetic suspension bearing（4-2）It is arranged in rotor mandrel（6）Interlude and respectively be located at high-speed electric expreess locomotive（5）The left and right sides；

The left axial magnetic suspension bearing（3-1）, right axial magnetic suspension bearing（3-2）It is respectively arranged in rotor mandrel（6）A left side Second segment, right second segment；

The left protection bearing（2-1）, right protection bearing（2-2）It is respectively arranged in rotor mandrel（6）Left 3rd section, the right 3rd Section；

Described working machine（1）It is installed on rotor mandrel（6）One end；

The rotor mandrel（6）Interlude is in left radial magnetic bearing（4-1）With right radial magnetic bearing（4-2）Correspondence position Put and be cased with radial direction permeability magnetic material；

The rotor mandrel（6）The end face of interlude is in left axial magnetic suspension bearing（3-1）With right axial magnetic suspension bearing（3-2） Correspondence position is cased with axial permeability magnetic material.

2. the method for work of the magnetic suspension motor without thrust disc according to claim 1, it is characterised in that：

Between electromagnetic force, axial magnetic suspension bearing and axial permeability magnetic material between radial magnetic bearing and radial direction permeability magnetic material Electromagnetic force, to rotor mandrel（6）Radial and axial displacement carries out active control；

Cooling medium sequentially passes through left axial magnetic suspension bearing（3-1）, left radial magnetic bearing（4-1）, high-speed electric expreess locomotive（5）、 Right radial magnetic bearing（4-2）, right axial magnetic suspension bearing（3-2）, runner is unimpeded.