A novel ultra-high speed motor structure with a hybrid magnetic bearing supporting and driving a spinning cup

Abstract

A novel ultra-high-speed motor structure with a spinning cup driven and supported by a hybrid magnetic bearing belongs to the technical field of textile machinery. Structurally, it consists of a main shaft, an axial coil seat, a black glue layer, a radial suspension structure, an axial suspension structure, and a motor cover. After the motor is powered on, the small sleeve coil and the large sleeve coil generate a rotating magnetic field and act on the motor main shaft to form a magnetoelectric dynamic rotating torque, and the main shaft starts to levitate and rotate. Axially, the second upper magnetic ring and the second lower magnetic ring generate a magnetic field, and the changing magnetic field generates an axial force on the motor main shaft component, thereby levitating the main shaft. The first upper magnetic ring and the first lower magnetic ring also generate a changing magnetic field, thereby controlling the axial suspension of the motor main shaft component. The present invention changes the sliding friction of the spinning cup high-speed motor main shaft to air friction, reduces the friction force, increases the rotational speed, can achieve the effect of balancing the external forces received by the motor main shaft, and enables the motor main shaft to work more smoothly and at high speed.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile machinery, and relates to a textile motor structure system, specifically to a new ultra-high speed motor structure driven by a hybrid magnetic bearing to support a spinning cup. Background Art

[0002] The motor is the power source in the industrial field. Through the interaction of electricity and magnetism, the mutual conversion between electrical energy and kinetic energy is realized. The motor plays a crucial role in the global industrial automation market and is widely used in the textile industry. In China, the textile industry has been passed down since ancient times and has been inherited for thousands of years. China'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. The magnetic levitation technology has made great progress in the field of motors and also accounts for a large proportion in the market share. The advantages of common high-speed bearings are high precision, small surface roughness, small clearance and small volume; the disadvantages are serious wear of high-speed bearings, high working temperature under large load, high failure rate, short service life and high power consumption; while the corresponding magnetic levitation bearings have great development prospects and economic value due to a series of characteristics such as low noise, environmental protection, high rotational speed and small friction. Driven by a motor, the main shaft automatically levitates to achieve smooth and frictionless operation, and can reach a speed of tens of thousands or hundreds of thousands of revolutions without lubrication. Currently, the spinning cup motors used in the textile industry adopt contact bearings, with serious wear on the contact surface, low rotational speed, low adjustment accuracy and sensitivity, and large structural dimensions. Summary of the Invention

[0003] The object of the present invention is to address the deficiencies of the current rotor spinning motors, such as slow rotational speed of the motor main shaft, low adjustment accuracy, high noise, serious wear, and large structural dimensions. A new ultra-high speed motor structure driven by a hybrid magnetic bearing to support a spinning cup is proposed. A symmetrical structure is adopted to form an axial-radial symmetrical magnetic bearing, reducing the volume of the overall structure. By combining electromagnetism and permanent magnetism to form a new stator winding structure, the position of the motor main shaft can be adjusted more conveniently, the effect of balancing the external force on the motor main shaft can be achieved, and the motor main shaft can work more smoothly and at high speed.

[0004] The technical solution of the present invention is: a novel ultra-high speed motor structure with a spinning cup supported and driven by a hybrid magnetic bearing, including a main shaft connected to the spinning cup; characterized in that: the main shaft is composed of a shaft head, a magnetic rod, a shaft tail, and a shaft sleeve connected. The shaft sleeve is sleeved outside the magnetic rod. The shaft head is connected and arranged on the left side of the shaft sleeve, and the shaft tail is connected and arranged on the right side of the shaft sleeve. Axial gaps are formed between the shaft head and the shaft tail and the magnetic rod respectively. A first upper magnetic ring and a first hoop are arranged outside the shaft head, and a second lower magnetic ring and a second hoop are arranged outside the shaft tail. From left to right on the outside of the shaft sleeve, there are an axial coil seat, a black glue layer, a radial suspension structure, an axial suspension structure, a motor cover, and a second upper magnetic ring in sequence. A first lower magnetic ring magnetically suspended and connected to the shaft sleeve is arranged in the axial coil seat. 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. A black glue layer is arranged on the right side of the axial coil seat; the radial suspension structure and the axial suspension structure are axially limited between the black glue layer and the motor cover;

[0005] The radial suspension structure is composed of a motor coil seat, a small sleeve coil, a large sleeve coil, and silicon steel sheets. The motor coil seat is arranged in the middle of the shaft sleeve. The small sleeve coil and the large sleeve coil are both arranged in the grooves inside the motor coil seat. The large sleeve coil is arranged outside the small sleeve coil. The silicon steel sheets are arranged outside the entire motor coil seat. Radial gaps are formed between the black glue layer, the motor coil seat and the shaft sleeve;

[0006] 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 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.

[0007] An interference fit is formed between the shaft sleeve and the magnetic rod, and clearance fits are formed between the shaft head and the shaft sleeve, and between the shaft tail and the shaft sleeve respectively. The axial gaps between the shaft head and the magnetic rod and between the shaft tail and the magnetic rod are equal.

[0008] The axial gaps between the first upper magnetic ring and the first lower magnetic ring and between the second upper magnetic ring and the second lower magnetic ring are equal; the radial gaps between the first lower magnetic ring and the shaft sleeve and between the second upper magnetic ring and the shaft sleeve are equal.

[0009] The outer diameter of the black glue layer is equal to the outer diameter of the silicon steel sheets.

[0010] The width of the small sleeve coil is 1 / 2 of the width of the large sleeve coil.

[0011] The beneficial effects of the present invention are as follows: The linkage mechanism for one-time vertical cutting and blanking and horizontal punching provided by the present invention is structurally composed of a main shaft, an axial coil seat, a black glue layer, a radial suspension structure, an axial suspension structure, and a motor cover. After the motor is powered on, the small sleeve coil and the large sleeve coil generate a rotating magnetic field and act on the motor main shaft to form a magnetoelectric dynamic rotating torque. The motor main shaft component starts to rotate in suspension. Axially, the second upper magnetic ring and the second lower magnetic ring generate a magnetic field, and the changing magnetic field generates an axial force on the motor main shaft component, thereby suspending the motor main shaft component. Moreover, the first upper magnetic ring and the first lower magnetic ring also generate a changing magnetic field, and the magnitude of the magnetic field can be adjusted through the coil, thereby controlling the axial suspension of the motor main shaft component and balancing the effect of external forces on it. The application of the magnetic bearing in the present invention changes the sliding friction of the high-speed motor main shaft of the spinning cup to air friction, reduces the friction force, increases the rotational speed, and raises the rotational speed of the main shaft to hundreds of thousands of revolutions. The new stator winding structure that combines electromagnetism and permanent magnetism can more conveniently adjust the position of the motor main shaft, achieve the effect of balancing the external forces received by the motor main shaft, and enable the motor main shaft to work more smoothly and at high speed. Brief Description of the Drawings

[0012] Figure 1 is a schematic cross-sectional structure diagram of the whole of the present invention.

[0013] Figure 2 is a schematic cross-sectional structure diagram of the main shaft in the present invention.

[0014] In the figure: main shaft 1, first upper magnetic ring 2, first lower magnetic ring 3, first hoop 4, coil 5, axial coil seat 6, black glue layer 7, silicon steel sheet 8, small sleeve coil 9, large sleeve coil 10, motor coil seat 11, motor cover 12, second upper magnetic ring 13, second lower magnetic ring 14, second hoop 15, shaft head 16, magnetic rod 17, shaft tail 18, shaft sleeve 19. Detailed Embodiment

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Such as Figure 1-2As shown in the figure, a new ultra-high speed motor structure with a spinning cup driven by a hybrid magnetic bearing includes a main shaft 1 connected to the spinning cup. The main shaft 1 is composed of a shaft head 16, a magnetic rod 17, a shaft tail 18, and a bushing 19. The bushing 19 is sleeved outside the magnetic rod 17. The shaft head 16 is connected and arranged on the left side of the bushing 19, and the shaft tail 18 is connected and arranged on the right side of the bushing 19. Axial gaps are formed between the shaft head 16 and the magnetic rod 17, and between the shaft tail 18 and the magnetic rod 17. A first upper magnetic ring 2 and a first hoop 3 are arranged outside the shaft head 16. A second lower magnetic ring 14 and a second hoop 15 are arranged outside the shaft tail 18. An axial coil seat 6, a black glue layer 7, a radial suspension structure, an axial suspension structure, a motor cover 12, and a second upper magnetic ring 13 are successively arranged outside the bushing 19 from left to right. A first lower magnetic ring 3 magnetically levitatedly connected to the bushing 19 is arranged inside the axial coil seat 6. An axial gap is formed between the first lower magnetic ring 3 and the first upper magnetic ring 2. A coil 5 is arranged between the first lower magnetic ring 3 and the axial coil seat 6. The black glue layer 7 is arranged on the right side of the axial coil seat 6. The radial suspension structure and the axial suspension structure are axially limited between the black glue 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 silicon steel sheets 8. The motor coil seat 11 is arranged in the middle of the bushing 19. The small sleeve coil 9 and the large sleeve coil 10 are both arranged in the grooves inside the motor coil seat 11. The large sleeve coil 10 is arranged outside the small sleeve coil 9. The silicon steel sheets 8 are arranged outside the entire motor coil seat 11. Radial gaps are formed between the black glue layer 7, the motor coil seat 11, and the bushing 19. The axial suspension structure is composed of the motor cover 12, the second upper magnetic ring 13, the second lower magnetic ring 14, and the second hoop 15. The motor cover 12 is arranged 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. A radial gap is formed between the motor cover 12 and the bushing 19. An axial gap is formed between the second upper magnetic ring 13 and the second lower magnetic ring 14.

[0017] As Figure 1-2 shown in the figure, a new ultra-high speed motor structure with a spinning cup driven by a hybrid magnetic bearing, an interference fit is formed between the bushing 19 and the magnetic rod 17, clearance fits are formed between the shaft head 16 and the bushing 19, and between the shaft tail 18 and the bushing 19. The axial gaps between the shaft head 16 and the magnetic rod 17 and between the shaft tail 18 and the magnetic rod 17 are equal; the axial gap values between the first upper magnetic ring 2 and the first lower magnetic ring 3 and between the second upper magnetic ring 13 and the second lower magnetic ring 14 are equal; the radial gap values between the first lower magnetic ring 3 and the bushing 19 and between the second upper magnetic ring 13 and the bushing 19 are equal; the outer diameter of the black glue layer 7 is equal to the outer diameter of the silicon steel sheets 8; the width of the small sleeve coil 9 is 1 / 2 of the width of the large sleeve coil 10.

[0018] As Figure 1-2As shown in the figure, the working principle of a new ultra-high-speed motor structure with a spinning cup driven by a hybrid magnetic bearing is as follows: When the motor is powered on, the small sleeve coil and the large sleeve coil generate a rotating magnetic field that acts on the motor spindle, forming a magnetoelectric dynamic rotating torque. The motor spindle component begins to levitate and rotate. Axially, the second upper magnetic ring and the second lower magnetic ring generate a magnetic field, and the changing magnetic field generates an axial force on the motor spindle component, thereby levitating the motor spindle component. Moreover, the first upper magnetic ring and the first lower magnetic ring also generate a changing magnetic field, and the magnitude of the magnetic field can be adjusted through the coil, thereby controlling the axial levitation of the motor spindle component and balancing the effect of external forces on it. The application of the magnetic bearing in the present invention changes the sliding friction of the spinning cup high-speed motor spindle to air friction, reduces the frictional force, increases the rotational speed, and raises the spindle speed to hundreds of thousands of revolutions. At the same time, the new stator winding method adopted combines electromagnetism and permanent magnetism, which makes it more convenient to adjust the position of the motor spindle, can achieve the effect of balancing the external forces on the motor spindle, and enables the motor spindle to operate more smoothly and at high speed.

Claims

1. A novel ultra-high speed motor structure with a spinning cup driven and supported by a hybrid magnetic bearing, comprising a main shaft (1) connected to the spinning cup; It is characterized in that: The main shaft (1) is composed of a shaft head (16), a magnetic rod (17), a shaft tail (18), and a shaft sleeve (19) connected. The shaft sleeve (19) is sleeved outside 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). Axial gaps are formed between the shaft head (16), the shaft tail (18) and the magnetic rod (17). 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) and a second hoop (15) are arranged outside the shaft tail (18). From left to right, an axial coil seat (6), a black glue layer (7), a radial suspension structure, an axial suspension structure, a motor cover (12), and a second upper magnetic ring (13) are arranged outside the shaft sleeve (19). A first lower magnetic ring (3) magnetically suspended and connected to the shaft sleeve (19) is arranged in the axial coil seat (6). An axial gap is formed between the first lower magnetic ring (3) and the first upper magnetic ring (2). A coil (5) is arranged between the first lower magnetic ring (3) and the axial coil seat (6). A black glue layer (7) is arranged on the right side of the axial coil seat (6); The radial suspension structure and the axial suspension structure are axially limited between the black glue 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 silicon steel sheets (8). The motor coil seat (11) is arranged in the middle of the shaft sleeve (19). The small sleeve coil (9) and the large sleeve coil (10) are both arranged in the grooves inside the motor coil seat (11). The large sleeve coil (10) is arranged outside the small sleeve coil (9). The silicon steel sheets (8) are arranged outside the entire motor coil seat (11). Radial gaps are formed between the black glue layer (7), the motor coil 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 seat (11). 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). An axial gap is formed between the second upper magnetic ring (13) and the second lower magnetic ring (14); An interference fit is formed between the shaft sleeve (19) and the magnetic rod (17). Clearance fits are formed between the shaft head (16) and the shaft sleeve (19), and between the shaft tail (18) and the shaft sleeve (19). The axial gaps between the shaft head (16) and the magnetic rod (17) and between the shaft tail (18) and the magnetic rod (17) are equal; The axial clearance between the first upper magnetic ring (2) and the first lower magnetic ring (3) is equal to the axial clearance value between the second upper magnetic ring (13) and the second lower magnetic ring (14); the radial clearance between the first lower magnetic ring (3) and the shaft sleeve (19) is equal to the radial clearance value between the second upper magnetic ring (13) and the shaft sleeve (19).

2. The ultra-high speed new motor structure for driving a spinning cup supported by a hybrid magnetic bearing according to claim 1, characterized in that: The outer diameter of the black glue layer (7) is equal to the outer diameter of the silicon steel sheet (8).

3. The ultra-high speed new motor structure for driving a spinning cup supported by a hybrid magnetic bearing according to claim 1, characterized in that: The width of the small sleeve coil (9) is 1 / 2 of the width of the large sleeve coil (10).

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