CN110729846A - Novel superspeed motor structure for supporting and driving spinning cup by mixed magnetic bearing - Google Patents

Abstract

An ultra-high-speed new motor structure supported by a mixed magnetic bearing to drive a rotor belongs to the technical field of textile machinery. , after the motor is energized, the small sleeve coil and the large sleeve coil 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 levitate and rotate, and the second upper magnetic ring and the second lower magnetic ring in the axial direction generate The magnetic field, the changing magnetic field produces an axial force on the main shaft part of the motor, thereby suspending the main shaft, and the first upper magnetic ring and the first lower magnetic ring in the axial direction also produce a changing magnetic field, thereby controlling the axial suspension of the main shaft part of the motor. The invention changes the spindle of the rotor high-speed motor from sliding friction to air friction, reduces the friction force, increases the rotational speed, can achieve the effect of balancing the external force on the motor spindle, and can make the motor spindle work more smoothly and at high speed.

Description

A new ultra-high-speed motor structure supported by mixed magnetic bearings to drive the rotor

technical field

The invention belongs to the technical field of textile machinery, and relates to a motor structure system for textiles, in particular to an ultra-high-speed new motor structure supported by a mixed magnetic bearing to drive a spinning rotor.

Background technique

The motor is the source of power in the industrial field. It realizes the mutual conversion between electrical energy and kinetic energy through the interaction of electricity and magnetism. Electric motors occupy a pivotal position in the global industrial automation market and are widely used in the textile industry. In my country, the textile industry is an industry that has been handed down since ancient times. It has been passed down for thousands of years. my country's textile industry has entered a period of rapid development. After decades of development, the development of the textile industry and its upstream and downstream is also very obvious. Magnetic levitation technology has made great progress in the field of motors, and has a large market share. 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 economic value due to a series of characteristics such as low noise, environmental protection, high speed and low friction. Driven by the motor, the main shaft is automatically suspended to achieve smooth and frictionless operation, and it can reach several times without lubrication. Thousands or hundreds of thousands of revolutions. At present, the imitation cup motors used in the textile industry use contact bearings, and the contact surfaces are severely worn, the speed is low, the adjustment accuracy and sensitivity are not high, and the structure size is large.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a super spinning rotor driven by a mixed magnetic bearing supported by the rotor spinning motor, which has the disadvantages of slow rotation speed of the main shaft of the motor, low adjustment accuracy, large noise, serious wear, and large structure size. The high-speed new motor structure adopts a symmetrical structure to form an axial radial symmetrical magnetic bearing, which reduces the volume of the overall structure, and combines electromagnetic and permanent magnets to form a new type of stator winding structure, which can adjust the position of the motor shaft more conveniently. To achieve the effect of balancing the external force on the motor shaft, the motor shaft can work more smoothly and at high speed.

The technical scheme of the present invention is: an ultra-high-speed new motor structure supported by a mixed magnetic bearing to drive a rotor, including a main shaft connecting the rotor; it is characterized in that: the main shaft is composed of a shaft head, a magnetic rod, a shaft tail, and a shaft sleeve. The connection is composed, the shaft sleeve is arranged on the outer side of the magnet bar, the shaft head connection is arranged on the left side of the shaft sleeve, the shaft tail connection is arranged on the right side of the shaft sleeve, and the shaft head connection is arranged on the right side of the shaft sleeve. An axial gap is formed between the shaft tail and the magnetic rod, the shaft head is provided with a first upper magnetic ring and a first hoop, and the shaft tail is provided with a second lower magnetic ring and a second hoop, The outside of the shaft sleeve is sequentially provided with an axial coil seat, a black rubber layer, a radial suspension structure, an axial suspension structure, a motor cover and a second upper magnetic ring from left to right, and the axial coil seat is provided with a first lower magnetic ring connected with the shaft sleeve magnetically suspended, an axial gap is formed between the first lower magnetic ring and the first upper magnetic ring, and a coil is arranged between the first lower magnetic ring and the axial coil seat, The right side of the axial coil seat is provided with a black rubber layer; the radial suspension structure and the axial suspension structure are axially limited between the black rubber layer and the motor cover;

The radial suspension structure is composed of a motor coil seat, a small sleeve coil, a large sleeve coil and a silicon steel sheet. The motor coil seat is arranged in the middle of the shaft sleeve, and both the small sleeve coil and the large sleeve coil are arranged. In the groove on the inner side of the motor coil seat, the large sleeve coil is arranged outside the small sleeve coil, and the silicon steel sheet is arranged outside the entire motor coil seat. The black rubber layer and the motor coil seat A radial gap is formed between them and the shaft sleeve;

The axial suspension structure is composed of a motor cover, a second upper magnetic ring, a second lower magnetic ring, and a second hoop. The motor cover is arranged on the right side of the motor coil seat, and the second upper magnetic ring It is arranged on the right side of the motor cover, a radial gap is formed between the motor cover and the shaft sleeve, and an axial gap is formed between the second upper magnetic ring and the second lower magnetic ring.

An interference fit is formed between the shaft sleeve and the magnetic rod, the shaft head and the shaft sleeve and the shaft tail and the shaft sleeve are all clearance fit, and the axial gap between the shaft head and the magnetic rod is the same as the shaft tail and the magnetic rod. The axial clearance between them is equal.

The axial gap between the first upper magnetic ring and the first lower magnetic ring is equal to the axial gap between the second upper magnetic ring and the second lower magnetic ring; the diameter between the first lower magnetic ring and the shaft sleeve is equal. The radial clearance between the second upper magnetic ring and the shaft sleeve is equal to the value of the radial clearance.

The outer diameter of the black rubber layer is equal to the outer diameter of the silicon steel sheet.

The width of the small sleeve coil is 1/2 of the width of the large sleeve coil.

The beneficial effects of the present invention are as follows: the one-time vertical cutting blanking and horizontal punching linkage mechanism provided by the present invention is structurally composed of a main shaft, an axial coil seat, a black rubber layer, a radial suspension structure, an axial suspension structure, and a motor. The cover is formed. After the motor is energized, the small sleeve coil and the large sleeve coil generate a rotating magnetic field and act on the main shaft of the motor to form a magneto-electric power rotating torque. The magnetic ring generates a magnetic field, and the changing magnetic field produces an axial force on the motor spindle parts, thereby suspending the motor spindle parts, and the axial first upper magnetic ring and the first lower magnetic ring also generate changing magnetic fields, and the size of the magnetic field can be adjusted. Through coil adjustment, the axial suspension of the main shaft part of the motor is controlled to balance the effect of its external force. The application of the magnetic 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 hundreds of thousands of revolutions. The new stator winding structure can adjust the position of the motor shaft more conveniently, and can achieve the effect of balancing the external force on the motor shaft, so that the motor shaft can work more smoothly and at high speed.

Description of drawings

FIG. 1 is a schematic diagram of the overall cross-sectional structure of the present invention.

FIG. 2 is a schematic view of the cross-sectional structure of the main shaft in the present invention.

In the figure: main shaft 1, first upper magnetic ring 2, first lower magnetic ring 3, first hoop 4, coil 5, axial coil holder 6, black rubber layer 7, silicon steel sheet 8, small sleeve coil 9, Large sleeve coil 10, motor coil base 11, motor cover 12, second upper magnetic ring 13, second lower magnetic ring 14, second hoop 15, shaft head 16, magnet bar 17, shaft tail 18, shaft sleeve 19 .

Detailed ways

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

As shown in Figure 1-2, a new ultra-high-speed motor structure supported by mixed magnetic bearings to drive the rotor includes a main shaft 1 connected to the rotor. 19 is connected and formed, the shaft sleeve 19 is sleeved on the outside of the magnetic rod 17, the shaft head 16 is connected and arranged on the left side of the shaft sleeve 19, and the shaft tail 18 is connected and arranged on the right side of the shaft sleeve 19. The shaft head 16 and the shaft tail 18 are both connected. An axial gap is formed with the magnet bar 17. The shaft head 16 is provided with a first upper magnetic ring 2 and a first hoop 3, and the shaft tail 18 is provided with a second lower magnetic ring 14 and a second hoop 15. The outside of the sleeve 19 is sequentially provided with an axial coil seat 6, a black rubber layer 7, a radial suspension structure, an axial suspension structure, a motor cover 12 and a second upper magnetic ring 13 from left to right. There is a first lower magnetic ring 3 which is magnetically connected with the shaft sleeve 19 , an axial gap is formed between the first lower magnetic ring 3 and the first upper magnetic ring 2 , and an axial gap is formed between the first lower magnetic ring 3 and the axial coil seat 6 . There is a coil 5 , and a black rubber layer 7 is provided on the right side of the axial coil base 6 ; the radial suspension structure and the axial suspension structure are axially limited between the black rubber layer 7 and the motor cover 12 . The radial suspension structure is composed of a motor coil seat 11, a small sleeve coil 9, a large sleeve coil 10, and a silicon steel sheet 8. The motor coil seat 11 is arranged in the middle of the shaft sleeve 19, and the small sleeve coil 9 and the large sleeve coil 10. All are arranged in the groove inside the motor coil base 11, the large sleeve coil 10 is arranged outside the small sleeve coil 9, the silicon steel sheet 8 is arranged on the outside of the entire motor coil base 11, the black glue layer 7, the motor coil A radial gap is formed between the seat 11 and the shaft sleeve 19 . The axial suspension structure is composed of a motor cover 12, a second upper magnetic ring 13, a second lower magnetic ring 14, and a second hoop 15. The motor cover 12 is arranged on the right side of the motor coil base 11, and the second upper magnetic ring 13 is arranged On the right side of the motor cover 12 , a radial gap is formed between the motor cover 12 and the shaft sleeve 19 , and an axial gap is formed between the second upper magnetic ring 13 and the second lower magnetic ring 14 .

As shown in Figure 1-2, a new ultra-high-speed motor structure is supported by mixed magnetic bearings to drive the rotor. An interference fit is formed between the shaft sleeve 19 and the magnet bar 17, and the shaft head 16 and the shaft sleeve 19. The tail 18 and the shaft sleeve 19 are all clearance fit, and the axial gap between the shaft head 16 and the magnetic rod 17 is equal to the axial gap between the shaft tail 18 and the magnetic rod 17; the first upper magnetic ring 2 and the first lower magnetic The axial gap between the magnetic rings 3 is equal to the axial gap between the second upper magnetic ring 13 and the second lower magnetic ring 14; the radial gap between the first lower magnetic ring 3 and the shaft sleeve 19 is the same as the second The radial gap value between the upper magnetic ring 13 and the shaft sleeve 19 is equal; the outer diameter of the black rubber layer 7 is equal to the outer diameter of the silicon steel sheet 8; the width of the small sleeve coil 9 is 1/2 of the width of the large sleeve coil 10 .

As shown in Figure 1-2, the working principle of a new ultra-high-speed motor structure supported by mixed magnetic bearings to drive the rotor is as follows: when the motor is energized, the small sleeve coil and the large sleeve coil generate a rotating magnetic field and act on the main shaft of the motor. The magneto-electric power rotation torque is formed, the motor spindle part starts to levitate and rotate, the second upper magnetic ring 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 motor spindle part, thereby suspending the motor spindle The first upper magnetic ring and the first lower magnetic ring in the axial direction also generate a changing magnetic field. The size of the magnetic field 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 magnetic 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 hundreds of thousands of revolutions. At the same time, the new stator winding method used, which combines electromagnetic and permanent magnets, can adjust the position of the motor shaft more conveniently, can achieve the effect of balancing the external force on the motor shaft, and make the motor shaft work more smoothly and at high speed.

Claims (5)

1. An ultra-high-speed novel motor structure supported by a mixed magnetic bearing to drive a rotor, comprising a main shaft (1) connecting the rotor; it is characterized in that: the main shaft (1) is composed of a shaft head (16), a magnetic rod (17) ), the shaft tail (18), and the shaft sleeve (19) are connected, the shaft sleeve (19) is sleeved on the outer side of the magnetic rod (17), and the shaft head (16) is connected and arranged on the shaft sleeve On the left side of (19), the shaft tail (18) is connected to the right side of the shaft sleeve (19), and the shaft head (16) and the shaft tail (18) are all between the magnet bar (17). An axial gap is formed, a first upper magnetic ring (2) and a first hoop (3) are arranged outside the shaft head (16), and a second lower magnetic ring (14) is arranged outside the shaft tail (18) and the second hoop (15), the outside of the shaft sleeve (19) is sequentially provided with an axial coil seat (6), a black rubber layer (7), a radial suspension structure, an axial suspension structure, The motor cover (12) and the second upper magnetic ring (13), the axial coil seat (6) is provided with a first lower magnetic ring (3) magnetically connected to the shaft sleeve (19), the first lower magnetic ring (3) An axial gap is formed between the magnetic ring (3) and the first upper magnetic ring (2), and a coil (5) is arranged between the first lower magnetic ring (3) and the axial coil seat (6). A black rubber layer (7) is provided on the right side of the axial coil holder (6); the radial suspension structure and the axial suspension structure are axially limited between the black rubber layer (7) and the motor cover (12). between; The radial suspension structure is composed of a motor coil seat (11), a small sleeve coil (9), a large sleeve coil (10) and a silicon steel sheet (8). The motor coil seat (11) is arranged on the shaft sleeve (10). 19) in the middle, the small sleeve coil (9) and the large sleeve coil (10) are both arranged in the groove inside the motor coil base (11), and the large sleeve coil (10) is arranged in the Outside the small sleeve coil (9), the silicon steel sheet (8) is arranged on the outside of the entire motor coil base (11), and the black glue layer (7) and the motor coil base (11) are all connected to the motor coil base (11). A radial gap is formed between the shaft sleeves (19); The axial suspension structure is composed of a motor cover (12), a second upper magnetic ring (13), a second lower magnetic ring (14), and a second hoop (15). On the right side of the motor coil seat (11), the second upper magnetic ring (13) is arranged on the right side of the motor cover (12), and a radial direction is formed between the motor cover (12) and the shaft sleeve (19). An axial gap is formed between the second upper magnetic ring (13) and the second lower magnetic ring (14). 2 . The ultra-high-speed new motor structure according to claim 1 , wherein the rotor is supported and driven by a mixed magnetic bearing, wherein an interference fit is formed between the shaft sleeve ( 19 ) and the magnet bar ( 17 ), The shaft head (16) and the shaft sleeve (19) and the shaft tail (18) and the shaft sleeve (19) are all clearance fit, and the axial clearance between the shaft head (16) and the magnet bar (17) is the same as the shaft The axial gap between the tail (18) and the magnet bar (17) is equal. 3. The ultra-high-speed novel motor structure according to claim 1, characterized in that: the first upper magnetic ring (2) and the first lower magnetic ring (3) The axial gap between the second upper magnetic ring (13) and the second lower magnetic ring (14) is equal to the value of the axial gap; the radial gap between the first lower magnetic ring (3) and the shaft sleeve (19) The value of the gap is equal to the radial gap between the second upper magnetic ring (13) and the shaft sleeve (19). 4. The ultra-high-speed novel motor structure according to claim 1, characterized in that: the outer diameter of the black rubber layer (7) and the outer diameter of the silicon steel sheet (8) equal. 5. The ultra-high-speed new motor structure according to claim 1, wherein the rotor is supported and driven by a mixed magnetic bearing, wherein the width of the small sleeve coil (9) is the width of the large sleeve coil (10). 1/2 of .

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