CN110670183A - Mixed magnetic suspension bearing for driving spindle of rotor ultra-high-speed motor - Google Patents

Abstract

A hybrid magnetic suspension bearing for driving the spindle of an ultra-high-speed motor of a spinning rotor belongs to the technical field of bearings. The structure is composed of an upper structure and a lower structure arranged on the spindle, and the structure is novel. The magnetic ring generates a rotating magnetic field and acts on the main shaft of the motor to form a magneto-electric power rotating torque. The main shaft begins to rotate in a radial suspension. The magnetic ring is composed of the second axial lower magnetic ring, which generates a magnetic field, and the changing magnetic field generates an axial force on the motor spindle part, thereby suspending the motor spindle part, and the axial first upper magnetic ring and the axial first lower magnetic ring The size of the magnetic field of the ring can be adjusted by the coil, so as to control the axial suspension of the main shaft part of the motor and balance the effect of its external force. The invention changes the main shaft of the rotor high-speed motor from sliding friction to air friction, reduces the friction force, increases the rotational speed, and increases the rotational speed of the main shaft to tens of thousands to hundreds of thousands of revolutions.

Description

A Hybrid Magnetic Suspension Bearing Used to Drive Spindle Rotor Ultra-High-Speed Motor Spindle

technical field

The invention belongs to the technical field of bearings, and relates to a magnetic suspension bearing structure, in particular to a hybrid magnetic suspension bearing used for driving a spindle of an ultra-high-speed motor of a rotor.

Background technique

Bearings are an important part of modern machinery and equipment, their main functions are to support and reduce friction, and at the same time ensure their rotation accuracy. An important part of. In recent years, with the development of magnetic levitation technology, it has also been widely used in the field of bearings, and its market share is also very large. The advantages of commonly used high-speed bearings are: high precision, small surface roughness, small clearance and small size; the disadvantages are: high-speed bearings are severely worn, high operating temperature under heavy load, high failure rate, short life and high power consumption; and The corresponding magnetic bearing has great development prospects and high economic value because of its non-friction, low noise, environmental protection, and high speed. Driven by the motor, the main shaft is automatically suspended to achieve smooth and frictionless operation, and the speed of tens of thousands or hundreds of thousands of revolutions can be achieved without lubrication. At present, most of the bearings of textile motors used in the textile industry are contact bearings. The contact surfaces are severely worn, the adjustment accuracy and sensitivity are not high, and the structure size is large and the rotational speed is low, which cannot meet the current higher and higher rotational speed requirements.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a hybrid magnetic suspension bearing for driving the main shaft of the rotor ultra-high-speed motor, aiming at the shortcomings of the main shaft bearing of the rotor spinning motor at present, such as slow rotation speed of the motor main shaft, low adjustment accuracy, high noise, serious wear and so on. , to form a symmetrical structure in the axial and radial directions, which can reduce the volume of the overall structure, make it more convenient to adjust the position of the motor spindle, achieve the effect of balancing the external force on the motor spindle, and make the motor spindle work more smoothly and at high speed.

The technical scheme of the present invention is: a hybrid magnetic suspension bearing for driving the main shaft of an ultra-high-speed motor of a spinning rotor includes a main shaft connected to the rotor motor; it is characterized in that: the hybrid magnetic suspension bearing consists of an upper structure and a lower structure arranged on the main shaft. composition;

The upper structure is composed of a radial upper magnetic ring, an axial first upper magnetic ring, an upper hoop, an axial first lower magnetic ring, a coil and an axial coil seat. The upper part of the main shaft is provided with a convex ring. The axial first upper magnetic ring is arranged on the left side of the convex ring, the axial first upper magnetic ring is arranged on the outer circumference of the convex ring, and an upper hoop is arranged on the outer side of the axial first upper magnetic ring, so The axial coil seat is arranged on the right side of the convex ring, the axial coil seat is provided with a coil, the inner side of the coil is provided with an axial first lower magnetic ring, and the axial first upper magnetic ring is connected with the axial first upper magnetic ring. An axial gap is formed between the first lower magnetic rings in the axial direction;

The lower structure is composed of the motor cover, the second upper magnetic ring in the axial direction, the second lower magnetic ring in the axial direction, the lower hoop and the lower magnetic ring in the radial direction; the lower part of the main shaft is provided with a convex ring, and the convex The outer circumference of the ring is provided with an axial second lower magnetic ring, the outer side of the axial second lower magnetic ring is provided with a lower hoop, and the axial second upper magnetic ring is arranged on the left side of the convex ring, so The motor cover is arranged on the left side of the axial second upper magnetic ring, the radial lower magnetic ring is arranged on the right side of the convex ring, the axial second upper magnetic ring and the axial second lower magnetic ring An axial gap is formed therebetween, and an axial gap is formed between the axial second lower magnetic ring and the radial lower magnetic ring component.

The main shaft forms a clearance fit with the radially upper magnetic ring components, and the main shaft forms a clearance fit with the radially lower magnetic ring.

The axial first upper magnetic ring forms a transition fit with the upper convex ring of the main shaft; the axial second lower magnetic ring forms a transition fit with the main shaft lower convex ring.

The outer diameter of the axial coil seat is equal to the outer diameter of the motor cover.

The radially upper magnetic ring has the same specifications as the radially lower magnetic ring.

The beneficial effects of the present invention are as follows: the hybrid magnetic suspension bearing for driving the main shaft of the ultra-high-speed motor of the rotor provided by the present invention is structurally composed of an upper structure and a lower structure arranged on the main shaft, and the structure is novel, the motor is energized, and the diameter is small. The upper magnetic ring and the radial lower magnetic ring generate a rotating magnetic field and act on the main shaft of the motor to form a magneto-electric rotational torque. The main shaft begins to rotate in a radial suspension. The ring, the second upper magnetic ring in the axial direction and the second lower magnetic ring in the axial direction generate a magnetic field, and the changing magnetic field produces an axial force on the main shaft part of the motor, thereby suspending the main shaft part of the motor, and the first upper magnetic ring in the axial direction And the magnetic field of the first lower magnetic ring in the axial direction can be adjusted by the coil, so as to control the axial suspension of the main shaft part of the motor and balance the effect of the external force. The application of the permanent magnet bearing in the present invention changes the main shaft of the rotor high-speed motor from sliding friction to air friction, reduces the friction force, increases the rotational speed, and increases the rotational speed of the main shaft to tens of thousands to hundreds of thousands of revolutions.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention.

In the figure: main shaft 1, radial upper magnetic ring 2, upper hoop 3, axial first upper magnetic ring 4, axial first lower magnetic ring 5, coil 6, axial coil holder 7, motor cover 8, axial The second upper magnetic ring 9 , the axial second lower magnetic ring 10 , the lower hoop 11 , and the radially lower magnetic ring 12 .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figure 1, the hybrid magnetic suspension bearing used to drive the spindle of the ultra-high-speed motor of the rotor includes a spindle 1 connected to the rotor motor, and consists of an upper structure and a lower structure arranged on the spindle 1; the upper structure is composed of radial magnetic The ring 2, the axial first upper magnetic ring 3, the upper hoop 4, the axial first lower magnetic ring 5, the coil 6 and the axial coil seat 7 are connected to form a connection. The upper part of the main shaft 1 is provided with a convex ring, and the axial first upper The magnetic ring 4 is arranged on the left side of the convex ring, the first upper magnetic ring 4 in the axial direction is arranged on the outer circumference of the convex ring, the upper hoop 3 is arranged on the outer side of the first upper magnetic ring 4 in the axial direction, and the coil seat 7 is arranged in the axial direction On the right side of the convex ring, a coil 6 is arranged in the axial coil base 7 , the inner side of the coil 6 is provided with an axial first lower magnetic ring 5 , and the axial first upper magnetic ring 4 and the axial first lower magnetic ring 5 are arranged. An axial gap is formed between them; the lower structure is composed of the motor cover 8, the second axial upper magnetic ring 9, the axial second lower magnetic ring 10, the lower hoop 11, and the radial lower magnetic ring part 12. The lower part of the main shaft 1 is connected. A convex ring is provided, the outer circumference of the convex ring is provided with an axial second lower magnetic ring 10, the outer side of the axial second lower magnetic ring 10 is provided with a lower hoop 11, and the axial second upper magnetic ring 9 is arranged on the convex ring. On the left side of the ring, the motor cover 8 is arranged on the left side of the second upper magnetic ring 9 in the axial direction, and the lower magnetic ring 12 in the radial direction is arranged on the right side of the convex ring. An axial gap is formed between the magnetic rings 10 , and an axial gap is formed between the second axial lower magnetic ring 10 and the radial lower magnetic ring component 12 .

As shown in Figure 1, for the hybrid magnetic suspension bearing used to drive the main shaft of the rotor ultra-high-speed motor, the main shaft 1 forms a clearance fit with the radial upper magnetic ring part 2, and the main shaft 1 forms a clearance fit with the radial lower magnetic ring 12; the axial first The upper magnetic ring 4 forms a transition fit with the upper convex ring of the main shaft; the axial second lower magnetic ring 10 forms a transition fit with the lower convex ring of the main shaft; the outer diameter of the axial coil seat 7 is equal to the outer diameter of the motor cover 8; The ring 2 has the same specifications as the radially lower magnetic ring 12 .

As shown in Figure 1, the hybrid magnetic suspension bearing used to drive the spindle of the ultra-high-speed motor of the rotor is energized, and the radially upper magnetic ring part and the radially lower magnetic ring part generate a rotating magnetic field and act on the motor spindle to form a magneto-electric power rotating torque , the main shaft part of the motor starts to rotate in radial suspension, and is controlled by two sets of permanent magnet bearings in the axial direction. The upper magnetic ring and the second axial lower magnetic ring are composed to generate a magnetic field, and the changing magnetic field generates an axial force on the motor spindle part, so as to suspend the motor spindle part, and the axial first upper magnetic ring and the axial first lower magnetic ring are formed. The magnetic field of the magnetic ring can be adjusted by the coil, so as to control the axial suspension of the main shaft part of the motor and balance the effect of its external force. The application of the permanent magnet bearing in the present invention changes the main shaft of the rotor high-speed motor from sliding friction to air friction, reduces the friction force, increases the rotational speed, and increases the rotational speed of the main shaft to tens of thousands to hundreds of thousands of revolutions.

Claims (5)

1. The mixed magnetic suspension bearing for driving the spindle of the rotor super-high-speed motor comprises a spindle (1) connected with a rotor motor; the method is characterized in that: the mixed magnetic suspension bearing consists of an upper structure and a lower structure which are arranged on the main shaft (1);

the upper structure is formed by connecting a radial magnetic ring (2), an axial first upper magnetic ring (3), an upper hoop (4), an axial first lower magnetic ring (5), a coil (6) and an axial coil base (7), a convex ring is arranged at the upper part of the main shaft (1), the axial first upper magnetic ring (4) is arranged at the left side of the convex ring, the axial first upper magnetic ring (4) is arranged on the outer circumference of the convex ring, the upper hoop (3) is arranged at the outer side of the axial first upper magnetic ring (4), the axial coil base (7) is arranged at the right side of the convex ring, the coil (6) is arranged in the axial coil base (7), the axial first lower magnetic ring (5) is arranged at the inner side of the coil (6), and an axial gap is formed between the axial first upper magnetic ring (4) and the axial first lower magnetic ring (5);

the lower structure is formed by connecting a motor cover (8), an axial second upper magnetic ring (9), an axial second lower magnetic ring (10), a lower hoop ring (11) and a radial lower magnetic ring component (12); the magnetic bearing is characterized in that a convex ring is arranged at the lower part of the main shaft (1), an axial second lower magnetic ring (10) is arranged on the outer circumference of the convex ring, a lower hoop (11) is arranged on the outer side of the axial second lower magnetic ring (10), an axial second upper magnetic ring (9) is arranged on the left side of the convex ring, the motor cover (8) is arranged on the left side of the axial second upper magnetic ring (9), a radial lower magnetic ring (12) is arranged on the right side of the convex ring, an axial gap is formed between the axial second upper magnetic ring (9) and the axial second lower magnetic ring (10), and an axial gap is formed between the axial second lower magnetic ring (10) and the radial lower magnetic ring (12).

2. The hybrid magnetic suspension bearing for driving a spindle of a rotor super high speed motor according to claim 1, wherein: the spindle (1) and the radial magnetic ring part (2) form clearance fit, and the spindle (1) and the radial lower magnetic ring (12) form clearance fit.

3. The hybrid magnetic suspension bearing for driving a spindle of a rotor super high speed motor according to claim 1, wherein: the axial first upper magnetic ring (4) is in transition fit with a convex ring at the upper part of the main shaft; the second axial lower magnetic ring (10) and the convex ring at the lower part of the main shaft form transition fit.

4. The hybrid magnetic suspension bearing for driving a spindle of a rotor super high speed motor according to claim 1, wherein: the outer diameter of the axial coil seat (7) is equal to that of the motor cover (8).

5. The hybrid magnetic suspension bearing for driving a spindle of a rotor super high speed motor according to claim 1, wherein: the radial magnetic ring (2) and the radial lower magnetic ring (12) have the same specification.

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