Open-end spinning motor and open-end spinning machine

Abstract

The present application relates to the technical field of air-jet spinning, and in particular to an air-jet spinning motor and an air-jet spinning machine. The present application provides an air-jet spinning motor, comprising a rotating shaft, two first magnetic bearing assemblies and a motor stator assembly. Along the axial direction of the rotating shaft, the two first magnetic bearing assemblies are respectively arranged at both ends of the rotating shaft to suspend and support the rotating shaft; the motor stator assembly is sleeved on the outer periphery of the rotating shaft, and along the axial direction of the rotating shaft, the motor stator assembly is located between the two first magnetic bearing assemblies; wherein, a first permanent magnet is arranged on the outer periphery of the rotating shaft, and the first permanent magnet is constructed as an annular structure, and along the radial direction of the rotating shaft, the first permanent magnet and the motor stator assembly are opposite and spaced apart. The present application also provides an air-jet spinning machine. It solves the technical problems of complex rotating shaft assembly process and poor integrity, and achieves the technical effect of simplifying the rotating shaft installation process and improving the integrity of the rotating shaft; and improves the stability of the connection between the spinning cup and the rotating shaft.

Description

Technical Field

[0001] The present application relates to the technical field of air-jet spinning, and in particular to an air-jet spinning motor and an air-jet spinning machine. Background Art

[0002] The air-spinning machine (also called the rotor spinning machine) includes a combing roller and a spinning cup. The combing roller opens the fed fiber strips into single fibers. The negative air pressure in the spinning cup causes the single fibers to be transported to the inner wall of the high-speed rotating rotor along the airflow. Under the centrifugal force of the high-speed rotating rotor, the single fibers adhere to the condensation groove at the maximum inner diameter of the rotor along the smooth inner wall, forming annular fiber strips.

[0003] The motor of the air-spinning machine provides rotational power for the rotor. At present, the rotor is arranged at the end of the shaft extension end of the rotating shaft. The rotor permanent magnet of the permanent magnet synchronous motor attracts the end of the rotor rod through magnetic force. Since the rotor permanent magnet is far away from the rotor rod, the magnetic circuit generated by the rotor permanent magnet can pass through the rotor rod less. In other words, the rotor rod of the spinning cup only generates suction through leakage magnetic flux to keep the rotor firmly on one end of the rotating shaft, and the attraction generated by the leakage magnetic flux is weak, making the connection between the rotor and the rotating shaft unreliable. In order to generate sufficient suction force to keep the rotor firmly on the shaft extension end of the rotating shaft, the rotor permanent magnet needs to be large in size and must adopt a solid structure. The large-volume and solid-structured shaft permanent magnet makes the shaft assembly process of the high-speed motor complicated and the integrity of the shaft poor. Summary of the invention

[0004] The present application provides an air-spinning motor and an air-spinning machine, which solve the technical problems of complex shaft assembly process and poor integrity, achieve the technical effect of simplifying the shaft installation process and improving the integrity of the shaft, and the shaft can reach a higher rotation speed; and improve the stability of the connection between the spinning cup and the shaft.

[0005] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, an embodiment of the present application provides an air-spinning motor, comprising a rotating shaft, two first magnetic bearing assemblies and a motor stator assembly, wherein the two first magnetic bearing assemblies are respectively arranged at both ends of the rotating shaft along the axial direction of the rotating shaft to suspend and support the rotating shaft; the motor stator assembly is sleeved on the outer circumference of the rotating shaft, and the motor stator assembly is located between the two first magnetic bearing assemblies along the axial direction of the rotating shaft; wherein a first permanent magnet is arranged on the outer circumference of the rotating shaft, and the first permanent magnet is constructed as an annular structure, and along the radial direction of the rotating shaft, the first permanent magnet and the motor stator assembly are opposite to and spaced apart from each other.

[0007] The air-spinning motor proposed in the embodiment of the present application is provided with two first magnetic bearing assemblies along the axial direction of the rotating shaft. The two first magnetic bearing assemblies provide a force on the rotating shaft in a plane perpendicular to the rotating shaft. When the rotating shaft has a radial disturbance, it can quickly compensate and adjust the position of the rotating shaft to ensure that the rotating shaft can stably maintain the required position. Along the radial direction of the rotating shaft, at a position relative to the motor stator assembly, there is a first permanent magnet spaced from the motor stator assembly. The first permanent magnet is constructed as an annular structure sleeved on the outer periphery of the rotating shaft. The rotating shaft is an integral structure, which improves the integrity of the rotating shaft, thereby improving the stiffness and mode of the rotating shaft.

[0008] Optionally, the first magnetic bearing assembly includes a first transverse stator, a first radial stator and a second radial stator, the first transverse stator is sleeved on the rotating shaft, and at least part of the first transverse stator is configured as a second permanent magnet; the first radial stator includes a first yoke and a first magnetic pole, and the second radial stator includes a second yoke and a second magnetic pole. Along the axial direction of the rotating shaft, the first yoke is sleeved on the rotating shaft, the first magnetic pole is connected to the first yoke and extends toward the rotating shaft along the radial direction of the rotating shaft, the second yoke is sleeved on the rotating shaft, the second magnetic pole is connected to the second yoke and extends toward the rotating shaft along the radial direction of the rotating shaft, and the first yoke and the second yoke are respectively arranged on both sides of the second permanent magnet. The first magnetic bearing assembly includes a first transverse stator, a first radial stator and a second radial stator, and at least part of the first transverse stator is configured as a second permanent magnet. The second permanent magnet generates a working magnetic flux between the first radial stator, the second radial stator and the rotating shaft, and generates a stable force on the rotating shaft.

[0009] Optionally, the first magnetic suspension bearing assembly further includes a first radial coil and a second radial coil, wherein the first radial coil is wound around the first magnetic pole and the second radial coil is wound around the second magnetic pole. The first radial coil is wound around the first magnetic pole and the second radial coil is wound around the second magnetic pole to form a double-pole permanent magnetic bias bearing structure with more control coils and greater current stiffness on the coils. The first radial coil and the second radial coil can generate a higher load-bearing capacity after being energized.

[0010] Optionally, the second radial stator is configured as a magnetic conductive ring, and the first magnetic suspension bearing assembly further includes a first radial coil, which is wound around the first radial stator. The first radial stator is configured as a magnetic conductive ring and has a magnetic conductive effect. The magnetic conductive ring, the second permanent magnet and the first radial stator constitute a single-pole permanent magnetic bias bearing, which can reduce the hysteresis loss and eddy current loss in the rotating shaft. After the first radial coil is energized, it provides a radial force to the rotating shaft. When the rotating shaft is radially disturbed, an adjustment magnetic field is formed by controlling the current in the first radial coil, and the magnetic field is superimposed with the bias magnetic field generated by the second permanent magnet to change the magnetic field strength between the second radial stator and the rotating shaft, thereby generating a radial electromagnetic force that can adjust the position of the rotating shaft, thereby adjusting the position of the rotating shaft.

[0011] Optionally, the first magnetic suspension bearing assembly further includes a first radial floating ring, which is arranged between the first radial stator and the second radial stator along the axial direction of the rotating shaft; along the radial direction of the rotating shaft, the inner end of the first radial floating ring protrudes from the inner end of the first radial stator, and the inner end of the first radial floating ring protrudes from the inner end of the second radial stator. A first radial floating ring is arranged between the first radial stator and the second radial stator, and the inner end of the first radial floating ring protrudes from the inner ends of the first mirror radial stator and the second radial stator. When the first magnetic suspension bearing assembly is not working, the rotating shaft is not affected by the suspension force and falls to the first radial floating ring under the action of gravity. The first radial floating ring carries the rotating shaft and the rotor, so that the rotating shaft and the first radial stator and the second radial stator will not contact each other. In addition, when the rotating shaft loses stability and falls, the radial impact force generated is relatively large, and the first radial floating ring can play a role in protecting the bearing.

[0012] Optionally, the first magnetic bearing assembly further includes a first sensor, wherein the first sensors are multiple and are arranged at intervals along the radial direction of the rotating shaft on the first radial floating ring, and the multiple first sensors are used to detect the radial offset state of the rotating shaft. Multiple first sensors are arranged at intervals along the radial direction of the rotating shaft, and the first sensors detect the radial offset of the rotating shaft. When the rotating shaft is radially offset, the first sensor transmits the detected radial displacement of the rotating shaft to the controller, and the controller controls the current in the coil to form an adjusting magnetic field, and superimposes the current with the bias magnetic field generated by the second permanent magnet, so as to change the magnetic field strength between the first radial stator and the second radial stator and the rotating shaft, thereby generating a radial electromagnetic force that can adjust the position of the rotating shaft, and adjusting the position of the rotating shaft to the center position.

[0013] In the second aspect, an embodiment of the present application provides an air-jet spinning machine, comprising the air-jet spinning motor and spinning cup described in any of the above embodiments, wherein an installation groove is provided on the end face of one end of the rotating shaft in the axial direction; the spinning cup comprises a cup body and a cup rod connected to each other, and the cup rod is inserted into the installation groove.

[0014] The air-jet spinning machine proposed in the embodiment of the present application has a mounting groove arranged at one end of the rotating shaft, and the cup rod of the spinning cup is inserted into the mounting groove. The spinning cup is held in the mounting groove by the suction generated by the first magnetic bearing assembly, thereby meeting the demand for frequent plugging and unplugging of the spinning cup. At the same time, under the action of the magnetic field in the motor, a stable suction force is generated between the cup rod and the rotating shaft, so that the spinning cup can be stably connected to the rotating shaft.

[0015] Optionally, along the radial direction of the rotating shaft, the cup rod is arranged opposite to the first magnetic bearing assembly near the spinning cup. Along the radial direction of the rotating shaft, the cup rod of the spinning cup is arranged opposite to the first magnetic bearing assembly near the spinning cup, and the magnetic circuit generated by the first magnetic bearing assembly passes through the cup rod, thereby improving the reliability of the connection between the spinning cup and the rotating shaft under the condition of high-speed rotation of the rotating shaft.

[0016] Optionally, the air-spinning motor further includes a first axial stator, a second axial stator and a first axial coil. Along the axial direction of the rotating shaft, a first magnetic bearing assembly away from the spinning cup is connected to one end of the first axial stator, the second axial stator is connected to the other end of the first axial stator and extends toward the rotating shaft, and the first axial coil is arranged between the first magnetic bearing assembly away from the spinning cup and the second axial stator; a thrust plate is arranged on the rotating shaft, and at least part of the thrust plate extends between the second axial stator and the first magnetic bearing assembly away from the spinning cup. The first axial coil is arranged between the second axial stator of the first magnetic bearing assembly away from the spinning cup. The magnetic field generated by the first axial coil after being energized generates an axial force on the rotating shaft, so that the axial position of the rotating shaft relative to the second axial stator can be adjusted, effectively ensuring the stability of the rotating shaft during rotation.

[0017] Optionally, the air-spinning motor further includes a first axial floating ring and a second axial floating ring. Along the axial direction of the rotating shaft, the first axial floating ring is arranged between the first magnetic bearing assembly away from the spinning cup and the thrust plate, and the second axial floating ring is arranged between the thrust plate and the second axial stator. The first axial floating ring is arranged between the first magnetic bearing assembly away from the spinning cup and the thrust plate, and the second axial floating ring is arranged between the thrust plate and the second axial stator, to ensure that there is no contact between the thrust plate and the first magnetic bearing assembly away from the spinning cup and the second axial stator, thereby improving the rotation efficiency of the rotating shaft and the thrust plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a partial structural schematic diagram of the air-spinning machine of the present application;

[0020] Figure 2 This is a partial structural schematic diagram of the air-spinning machine of the present application;

[0021] Figure 3 This is a partial cross-sectional schematic diagram of the first magnetic bearing assembly of the present application;

[0022] Figure 4 This is a partial cross-sectional schematic diagram of the first magnetic bearing assembly of the present application;

[0023] Figure 5 This is a partial structural schematic diagram of the air-spinning machine of the present application;

[0024] Figure 6 This is a schematic diagram of the structure of the first magnetic bearing assembly of the present application;

[0025] Figure 7 This is a schematic diagram of the magnetic field generated when the second permanent magnet of the first magnetic bearing assembly of the present application acts alone;

[0026] Figure 8 This is a partial structural schematic diagram of the air-spinning machine of the present application;

[0027] Fig. 9 This is a partial structural schematic diagram of the air-spinning machine of the present application;

[0028] Fig.10 This is a schematic diagram of the leakage magnetic circuit generated by the second permanent magnet of the first magnetic bearing assembly of the present application.

[0029] [Description of Reference Numerals]

[0030] 10: rotating shaft; 11: motor stator assembly; 12: first permanent magnet; 13: mounting slot; 2: first magnetic bearing assembly; 21: first transverse stator; 22: first radial stator; 221: first yoke; 222: first magnetic pole; 23: second radial stator; 231: second yoke; 232: second magnetic pole; 24: first radial coil; 25: second radial coil: 26: first radial floating ring; 27: first sensor; 3: spinning cup; 31: cup body; 32: cup rod; 41: first axial stator; 42: second axial stator: 43: first axial coil; 44: first axial floating ring; 45: second axial floating ring; 46: thrust plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0033] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0036] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0037] At present, the permanent magnets of electronic rotors are solid permanent magnets, which divide the shaft into several sections, resulting in poor integrity, which is not conducive to improving the stiffness and modality of the shaft, and the shaft transfer process is complex and costly. Therefore, it is necessary to develop a motor with good integrity, simple process, low cost and the ability to improve the stiffness and modality of the shaft.

[0038] In addition, the magnetic levitation motor mainly realizes radial and axial suspension of the rotating shaft through passive or active magnetic bearings. If the magnetic bearing is passive, it is impossible to achieve high stability and low vibration control of the rotating shaft at high speed due to the lack of controllable stiffness and damping. If the active type is adopted, the required protective bearing occupies a certain axial space, and the required control system is all located outside the textile machine, resulting in the axial dimension of the textile machine rotating shaft being too long and the overall volume being too large. Therefore, in order to reduce the overall volume of the motor and improve the operating efficiency of the motor, while increasing the rotation speed of the rotating shaft as much as possible, when the outer diameter of the rotating shaft is constant, it is necessary to reduce the axial length of the rotating shaft to increase the working speed that the rotating shaft can reach. Therefore, a motor with the smallest axial length of the rotating shaft and reliable suspension accuracy of the rotating shaft is also required.

[0039] First, refer to Figure 1 and Figure 2An embodiment of the present application provides an air-spinning motor, which includes a rotating shaft 10, two first magnetic bearing assemblies 2 and a motor stator assembly 11. Along the axial direction of the rotating shaft 10, the two first magnetic bearing assemblies 2 are respectively arranged at both ends of the rotating shaft 10 to suspend and support the rotating shaft 10; the motor stator assembly 11 is sleeved on the outer periphery of the rotating shaft 10, and along the axial direction of the rotating shaft 10, the motor stator assembly 11 is located between the two first magnetic bearing assemblies 2; wherein, a first permanent magnet 12 is arranged on the outer periphery of the rotating shaft 10, and the first permanent magnet 12 is constructed as an annular structure. Along the radial direction of the rotating shaft 10, the first permanent magnet 12 and the motor stator assembly 11 are opposite to and spaced apart.

[0040] Specifically, the rotating shaft 10 includes a middle part and ends arranged on both sides of the middle part. Along the axial direction of the rotating shaft 10, two first magnetic bearing assemblies 2 are respectively arranged at the ends on both sides of the middle part. The motor stator assembly 11 is sleeved on the outer periphery of the middle part and has a gap with the middle part. The motor stator assembly 11 is located between the two first magnetic bearing assemblies 2. Among them, the outer diameter of the middle part is smaller than the outer diameter of the ends on both sides. The rotating shaft 10 forms a recess in the middle part. The first permanent magnet 12 is constructed as an annular structure and is sleeved in the middle part. In addition, along the radial direction of the rotating shaft 10, the first permanent magnet 12 is opposite to the motor stator assembly 11 and is arranged at intervals. The first permanent magnet 12 is sleeved in the middle part of the rotating shaft 10, and the rotating shaft 10 is an integral structure.

[0041] The air-spinning motor proposed in the embodiment of the present application is provided with two first magnetic bearing assemblies 2 along the axial direction of the rotating shaft 10. The two first magnetic bearing assemblies 2 provide a force on the rotating shaft 10 in a plane perpendicular to the axial direction of the rotating shaft 10, that is, the two first magnetic bearing assemblies 2 provide a force on the rotating shaft 10 in the plane where the rotating shaft 10 is located radially. When the rotating shaft 10 is disturbed radially, the two first magnetic bearing assemblies 2 can quickly apply a force to adjust the position of the rotating shaft 10 to ensure that the rotating shaft 10 can be stably maintained at the center position. Along the radial direction of the rotating shaft 10, at a position relative to the motor stator assembly 11, there is a first permanent magnet 12 spaced apart from the motor stator assembly 11. The first permanent magnet 12 is constructed as an annular structure sleeved on the outer periphery of the rotating shaft 10. The rotating shaft 10 is an integral structure, which improves the integrity of the rotating shaft 10, thereby improving the stiffness and mode of the rotating shaft 10, and the rotating shaft of the integral structure can reach a higher speed. At the same time, using the first permanent magnet 12 with an annular structure to replace the solid large permanent magnet makes the motor smaller and the assembly method of the rotating shaft 10 and the rotor simpler.

[0042] Specifically, since the permanent magnet part of the rotating shaft in the prior art is a solid structure, the rotating shaft is divided into multiple sections in the axial direction, and the integrity is poor, which is not conducive to improving the stiffness and mode of the rotating shaft 10. In the present application, the rotating shaft 10 is an integral structure in the axial direction, and the first permanent magnet 12 of the annular structure is sleeved on the outer periphery of the rotating shaft 10, so that the integrity of the rotating shaft 10 can be further improved, thereby improving the stiffness and mode of the rotating shaft 10, and the rotating shaft 10 can reach a higher speed.

[0043] Optionally, refer to Figure 3 and Figure 4 The first magnetic bearing assembly 2 includes a first transverse stator 21, a first radial stator 22 and a second radial stator 23. The first transverse stator 21 is sleeved on the rotating shaft 10, and at least a portion of the first transverse stator 21 is configured as a second permanent magnet; the first radial stator 22 includes a first yoke 221 and a first magnetic pole 222, and the second radial stator 23 includes a second yoke 231 and a second magnetic pole 232. Along the axial direction of the rotating shaft 10, the first yoke 221 is sleeved on the rotating shaft 10, and the first magnetic pole 222 is connected to the first yoke 221 and extends toward the rotating shaft 10 along the radial direction of the rotating shaft 10; along the axial direction of the rotating shaft 10, the second yoke 231 is sleeved on the rotating shaft 10, and the second magnetic pole 232 is connected to the second yoke 231 and extends toward the rotating shaft 10 along the radial direction of the rotating shaft 10, and the first yoke 221 and the second yoke 231 are respectively arranged on both sides of the second permanent magnet. The first magnetic bearing assembly 2 includes a first transverse stator 21, a first radial stator 22, and a second radial stator 23. At least a portion of the first transverse stator 21 is configured as a second permanent magnet. The second permanent magnet of the first magnetic bearing assembly 2 generates a bias magnetic flux between the first radial stator 22, the second radial stator 23, and the rotating shaft 10.

[0044] The first radial stator 22 includes a first yoke 221 and four first magnetic poles 222 spaced apart by the first yoke 221 along the circumferential direction of the rotating shaft 10, the first magnetic pole 222 extends toward the rotating shaft 10 along the radial direction of the rotating shaft 10, and a first gap is formed between the end of the first magnetic pole 222 and the rotating shaft 10. The second radial stator 23 includes a second yoke 231 and four second magnetic poles 232 spaced apart by the second yoke 231 along the circumferential direction of the rotating shaft 10, the second magnetic pole 232 extends toward the rotating shaft 10 along the radial direction of the rotating shaft 10, and a second gap is formed between the end of the second magnetic pole 232 and the rotating shaft 10.

[0045] Optionally, refer to Figure 5The first magnetic bearing assembly 2 also includes a first radial coil 24 and a second radial coil 25, wherein the first radial coil 24 is wound around the first magnetic pole 222, and the second radial coil 25 is wound around the second magnetic pole 232. The first radial coil 24 is wound around the first magnetic pole 222, and the second radial coil 25 is wound around the second magnetic pole 232, forming a dual-pole permanent magnetic bias bearing structure with more control coils and greater current stiffness on the coils. The first radial coil 24 and the second radial coil 25 can generate a higher load-bearing capacity after being energized.

[0046] Optionally, the second radial stator 23 is configured as a magnetic conductive ring, and the first magnetic suspension bearing assembly 2 further includes a first radial coil 24, which is wound around the first radial stator 22. The first radial stator 22 is configured as a magnetic conductive ring and has a magnetic conductive effect. The magnetic conductive ring, the second permanent magnet and the first radial stator 22 constitute a single-pole permanent magnetic bias bearing, which can reduce the hysteresis loss and eddy current loss in the rotating shaft 10. After the first radial coil 24 is energized, it provides a radial force for the rotating shaft 10. When the rotating shaft 10 is radially disturbed, the current in the first radial coil 24 is controlled to form a regulating magnetic field, and the magnetic field is superimposed with the bias magnetic field generated by the second permanent magnet, so as to change the magnetic field strength between the second radial stator 23 and the rotating shaft 10, thereby generating a radial electromagnetic force that can adjust the position of the rotating shaft 10, thereby adjusting the position of the rotating shaft 10.

[0047] Specifically, the bias magnetic flux generated by the second permanent magnet is composed of a permanent magnetic main magnetic circuit and a permanent magnetic leakage magnetic circuit. Figure 7 As shown, taking the Y+ direction magnetic pole as an example, the area above the Y direction rotating shaft is defined as Y+, and the magnetic circuit passes through the second permanent magnet, the first radial stator 22, the magnetic pole gap between the first radial stator 22 in the Y+ direction and the rotating shaft 10, the rotating shaft 10, the magnetic pole gap between the second radial stator 23 in the Y+ direction and the rotating shaft 10, the second radial stator 23, and the second permanent magnet to form a loop.

[0048] After the first radial coil 24 is energized, it provides magnetic flux for the first magnetic bearing assembly 2. The electromagnetic magnetic circuit generated by the first radial coil 24 is as follows: Figure 3 (dashed line). Taking the magnetic flux generated by the first radial coil 24 on the first magnetic pole 222 in the Y direction after being energized as an example, the electromagnetic magnetic field passes through the first gap between the first magnetic pole 222 in the Y+ direction and the rotating shaft 10, the first magnetic pole 222 in the Y+ direction, the radial first yoke 221, the first magnetic pole 222 in the Y-direction, the first gap between the first magnetic pole 222 in the Y-direction and the rotating shaft 10, and finally forms a closed loop through the rotating shaft 10. The permanent magnetic main magnetic circuit generated by the second permanent magnet and the electromagnetic magnetic circuit formed by the first radial coil 24 work together to provide radial suspension force for the rotating shaft 10.

[0049] When radial disturbance occurs to the rotating shaft 10, an adjusting magnetic field is formed by controlling the current in the first radial coil 24, and superimposed with the bias magnetic field generated by the second permanent magnet, so as to change the strength of the magnetic field in the gap between the rotating shaft 10 and the first radial stator 22 and the second radial stator 23, thereby generating an actively adjustable radial electromagnetic force, thereby realizing the adjustment of the radial offset position of the rotating shaft 10.

[0050] It should be understood that in the present application, the first radial stator 22 is made of laminated materials with high magnetic permeability, such as silicon steel, 1J50, 1J22, etc.; the magnetic ring is made of materials with good magnetic conductivity, such as electrical pure iron or low carbon steel, etc. The first permanent magnet 12 and the second permanent magnet are made of permanent magnetic materials such as neodymium iron boron or samarium cobalt.

[0051] Optionally, refer to Figure 1 , Figure 2 and Figure 6 The first magnetic bearing assembly 2 further includes a first radial floating ring 26, which is disposed between the first radial stator 22 and the second radial stator 23 along the axial direction of the rotating shaft 10; along the radial direction of the rotating shaft 10, the inner end of the first radial floating ring 26 protrudes from the inner end of the first radial stator 22, and the inner end of the first radial floating ring 26 protrudes from the inner end of the second radial stator 23. The first radial floating ring 26 is disposed between the first radial stator 22 and the second radial stator 23, and the inner end of the first radial floating ring 26 protrudes from the inner ends of the first radial stator 22 and the second radial stator 23. That is to say, the inner diameter of the first radial floating ring 26 is smaller than the inner diameter of the first radial stator 22, and the inner diameter of the first radial floating ring 26 is smaller than the inner diameter of the second radial stator 23. When the first magnetic bearing assembly 2 is not working, the shaft 10 is not affected by the suspension force and falls to the first radial floating ring 26 under the action of gravity. The first radial floating ring 26 carries the shaft 10, so that the shaft 10 does not contact the first radial stator 22 and the second radial stator 23. And when the shaft 10 loses stability and falls, the radial impact force generated is relatively large, and the first radial floating ring 26 can protect the bearing.

[0052] Optionally, refer again to Figure 1 , Figure 2 and Figure 6The first magnetic bearing assembly 2 further includes a first sensor 27. The first sensors 27 are multiple and are arranged at intervals along the radial direction of the rotating shaft 10 on the first radial floating ring 26. The multiple first sensors 27 are used to detect the radial offset state of the rotating shaft 10. Multiple first sensors 27 are arranged at intervals along the radial direction of the rotating shaft 10 on the first radial floating ring 26. The first sensors 27 detect the radial offset of the rotating shaft 10. When the rotating shaft 10 is radially offset, the first sensor 27 transmits the detected radial displacement of the rotating shaft 10 to the controller. The controller controls the current in the first radial coil 24 and the second radial coil 25 to form an adjustment magnetic field, and superimposes the current with the bias magnetic field generated by the second permanent magnet to change the magnetic field strength between the first radial stator 22 and the second radial stator 23 and the rotating shaft 10, thereby generating a radial electromagnetic force that can adjust the position of the rotating shaft 10, and adjusting the position of the rotating shaft 10 to the center position. In one embodiment, the first sensor 27 detects the radial offset of the rotating shaft 10. When the rotating shaft 10 is radially offset, the first sensor 27 transmits the detected radial displacement of the rotating shaft 10 to the controller. The controller controls the current in the first radial coil 24 to form an adjusting magnetic field, and superimposes it with the bias magnetic field generated by the second permanent magnet, thereby changing the magnetic field strength between the first radial stator 22 and the magnetic conductive ring and the rotating shaft 10, thereby generating a radial electromagnetic force that can adjust the position of the rotating shaft 10, and adjusting the position of the rotating shaft 10 to the center position.

[0053] The first sensor 27 and the first radial floating ring 26 are arranged in the first magnetic bearing assembly 2, so as to shorten the axial length of the rotating shaft 10, increase the working speed, reduce the volume of the air-spinning motor, and reduce the cost.

[0054] Since the spinning cup needs to be frequently removed from the shaft to clean the accumulated lint in the air-jet spinning production, the fixing method of the spinning cup of the air-jet spinning machine needs to be mechanically assembled with gaps to meet the needs of frequent plugging and unplugging and a reliable connection method. At the same time, in order to improve the production quality and efficiency of the spinning machine, the rotation speed of the shaft needs to be increased as much as possible. However, the shaft is directly connected to the shaft, and the axial and radial vibrations of the shaft at ultra-high speeds can easily cause the rotor to detach from the shaft. In order to meet the needs of high stability and low vibration of the spinning cup at high speeds, the axial length of the shaft needs to be as small as possible while the suspension accuracy of the shaft needs to be reliable, and at the same time, the connection method between the spinning cup and the shaft needs to be stable and reliable when the shaft rotates at high speeds. Therefore, it is necessary to develop an air-jet spinning machine that can stably connect the spinning cup to the shaft.

[0055] In the second aspect, an embodiment of the present application provides an air-jet spinning machine, comprising an air-jet spinning motor and a spinning cup 3 according to any of the above embodiments, wherein an installation groove 13 is provided on the end face of one end of the rotating shaft 10 in the axial direction; the spinning cup 3 comprises a cup body 31 and a cup rod 32 connected to each other, and the cup rod 32 is inserted into the installation groove 13.

[0056] The air-jet spinning machine proposed in the embodiment of the present application is provided with a mounting groove 13 at one end of the rotating shaft 10, and the cup rod 32 of the spinning cup 3 is inserted into the mounting groove 13. The cup rod 32 and the mounting groove 13 are connected by a clearance fit. When the accumulated lint in the spinning cup 3 needs to be cleaned, the cup rod 32 of the spinning cup 3 can be taken out from the mounting groove 13; after the accumulated lint in the spinning cup 3 is cleaned, the cup rod 32 of the spinning cup 3 is inserted into the mounting groove 13. The connection method between the spinning cup 3 and the rotating shaft 10 can meet the needs of frequent plugging and unplugging. Among them, the spinning cup 3 is kept in the mounting groove 13 by the suction force generated by the first magnetic suspension bearing assembly 2. Under the action of the magnetic field in the magnetic bearing motor, the spinning cup 3 generates a stable suction force between the cup rod 32 and the rotating shaft 10, so that the spinning cup can be stably connected to the rotating shaft 10.

[0057] Optionally, refer to Figure 8 , along the radial direction of the rotating shaft 10, the cup rod 32 is arranged opposite to the first magnetic bearing assembly 2 close to the spinning cup 3. Along the radial direction of the rotating shaft 10, the cup rod 32 of the spinning cup 3 is arranged opposite to the first magnetic bearing assembly 2 close to the spinning cup 3, and the magnetic circuit generated by the first magnetic bearing assembly 2 passes through the cup rod 32, which improves the reliability of the connection between the spinning cup 3 and the rotating shaft 10 under the condition of high-speed rotation of the rotating shaft 10.

[0058] That is to say, the first magnetic bearing assembly 2 close to the spinning cup 3 can not only provide radial force to the rotating shaft 10, but also form a reliable magnetic adsorption effect on the cup rod 32 of the spinning cup 3, so that the cup rod 32 of the spinning cup 3 can rotate at high speed and can be easily disassembled and assembled.

[0059] Optionally, the air-spinning motor further includes a first axial stator 41, a second axial stator 42 and a first axial coil 43. Along the axial direction of the rotating shaft 10, the first magnetic bearing assembly 2 away from the spinning cup 3 is connected to one end of the first axial stator 41, the second axial stator 42 is connected to the other end of the first axial stator 41 and extends toward the rotating shaft 10, and the first axial coil 43 is arranged between the first magnetic bearing assembly 2 and the second axial stator 42 away from the spinning cup 3; a thrust plate 46 is arranged on the rotating shaft 10, and at least part of the thrust plate 46 extends between the second axial stator 42 and the first magnetic bearing assembly 2 away from the spinning cup. The first axial coil 43 is arranged between the first magnetic bearing assembly 2 and the second axial stator 42 away from the spinning cup. The magnetic field generated by the first axial coil 43 after being energized generates an axial force on the rotating shaft 10, so that the axial position of the rotating shaft 10 relative to the second axial stator 42 can be adjusted, effectively ensuring the stability of the rotating shaft 10 during rotation.

[0060] Specifically, the first magnetic bearing assembly 2 away from the spinning cup 3, the first bearing magnetic ring, the second axial stator 42 and the first axial coil 43 form a three-degree-of-freedom magnetic bearing, which can provide axial and radial bias magnetic flux for the rotating shaft 10 and adjust the radial and axial positions of the rotating shaft 10.

[0061] Optionally, the air-spinning motor further includes a first axial floating ring 44 and a second axial floating ring 45. Along the axial direction of the rotating shaft 10, the first axial floating ring 44 is arranged between the first magnetic bearing assembly 2 and the thrust plate 46 away from the spinning cup 3, and the second axial floating ring 45 is arranged between the thrust plate 46 and the second axial stator 42. The first axial floating ring 44 is arranged between the first magnetic bearing assembly 2 and the thrust plate 46 away from the spinning cup 3, and the second axial floating ring 45 is arranged between the thrust plate 46 and the second axial stator 42, so as to ensure that the thrust plate 46 and the first magnetic bearing assembly 2 and the second axial stator 42 away from the spinning cup 3 do not contact each other, thereby improving the rotation efficiency of the rotating shaft 10 and the thrust plate 46.

[0062] In the present application, the first magnetic suspension bearing assembly 2 near the spinning cup 3 side adopts a permanent magnetic bias magnetic bearing structure containing a second permanent magnet, which can not only provide radial suspension force, but also the permanent magnetic circuit generated by the second permanent magnet passes through the cup rod 32, which will generate a stable and reliable permanent magnetic suction force, so that the cup rod 32 and the rotating shaft 10 are mechanically gap-assembled and have a reliable connection method at high speed. In other words, the second permanent magnet generates a magnetic circuit passing through the cup rod 32, thereby generating a stable suction force between the cup rod 32 and the rotating shaft 10.

[0063] Specifically, taking the Y+ direction magnetic pole as an example, the main magnetic circuit generated by the first magnetic suspension bearing assembly 2 is the second permanent magnet, the first radial stator 22, the magnetic pole gap between the first radial stator 22 in the Y+ direction and the rotating shaft 10, the rotating shaft 10-cup rod 32, the magnetic pole gap between the second radial stator 23 in the Y+ direction and the rotating shaft 10-the second radial stator 23, the second permanent magnet, and the main magnetic circuit is formed by the second permanent magnet of the first magnetic suspension bearing assembly 2 close to the spinning cup, generating a radial force on the cup rod 32. At the same time, after the first radial coil 24 is energized, it provides magnetic flux to the first magnetic suspension bearing assembly 2, and the electromagnetic magnetic circuit generated by the first radial coil 24 is as follows Figure 3(dashed line). Taking the magnetic flux generated by the coil of the first magnetic pole 222 in the Y direction after being energized as an example, the electromagnetic magnetic field passes through the first gap between the first magnetic pole 222 in the Y+ direction and the rotating shaft 10, the first magnetic pole 222 in the Y+ direction, the radial first yoke 221, the first magnetic pole 222 in the Y-direction, the first gap between the first magnetic pole 222 in the Y-direction and the rotating shaft 10, and finally forms a closed loop through the magnetic pole rotor. When the rotating shaft 10 is radially disturbed, the first radial coil 24 forms a regulating magnetic field by controlling the current, which is superimposed with the bias magnetic field generated by the second permanent magnet, changing the strength of the magnetic field in the gap, thereby generating a radial electromagnetic force that can actively adjust the position of the rotating shaft 10, thereby adjusting the position of the rotating shaft 10.

[0064] refer to Fig.10 The permanent magnetic leakage magnetic circuit generated by the first magnetic suspension bearing assembly 2 is the second permanent magnet, the first radial stator 22, the magnetic pole gap between the first radial stator 22 and the rotating shaft 10 in the Y+ direction, the rotating shaft 10, the cup rod 32, the cup body 31, the axial gap between the cup body 31 and the rotating shaft 10, the rotating shaft 10, the magnetic pole gap between the second radial stator 23 and the rotating shaft 10 in the Y+ direction, the second radial stator 23, and the second permanent magnet. Through the permanent magnetic leakage magnetic circuit, a stable and reliable axial attraction is generated for the spinning cup 3, so that the connection between the spinning cup 3 and the rotating shaft 10 is stable.

[0065] On the side away from the spinning cup 3, a permanent magnet biased magnetic bearing structure is also used. On the side away from the spinning cup 3, there is a first magnetic suspension bearing assembly 2 and a first axial stator 41, a second axial stator 42 and a first axial coil 43. The first axial stator 41 is connected to the first magnetic suspension bearing assembly 2 on the side away from the spinning cup 3. A first axial floating ring 44 is provided on the outer side of the second radial stator 23, and a second axial floating ring 45 is provided on the inner side of the second axial stator 42. The thrust plate 46 is located between the first axial floating ring 44 and the second axial floating ring 45. The first magnetic suspension bearing assembly 2 can provide radial suspension force for the rotating shaft 10 to achieve radial control of the rotating shaft 10; the first axial stator 41, the second axial stator 42 and the first axial coil 43 can provide controllable axial suspension force to the thrust plate 46 on the rotating shaft 10 to achieve axial control of the rotating shaft 10. Compared with the first magnetic bearing assembly 2 on the side close to the spinning cup 3, the inner diameter of the second radial stator 23 on the side away from the spinning cup 3 is larger, so that the magnetic circuit generated by the second permanent magnet is distributed along the axial direction, reducing the additional radial displacement negative stiffness generated by the radial magnetic circuit. In other words, the inner diameter of the second radial stator 23 on the side away from the spinning cup 3 is larger than the inner diameter of the second radial stator 23 on the side close to the spinning cup 3, so that the magnetic circuit generated by the second permanent magnet passes through the thrust plate 46 along the axial direction of the second radial stator 23, and then passes through the rotating shaft, thereby forming a loop.

[0066] Specifically, on the side away from the spinning cup 3, the permanent magnet magnetic circuit generated by the first magnetic bearing assembly 2 in the axial direction is as follows: Figure 8 As shown, taking the Z-direction magnetic pole as an example, the first part of the magnetic circuit generated by the second permanent magnet passes through the second radial stator 23, the gap between the second radial stator 23 and the thrust disk 46 in the Z-direction - thrust disk 46; the second part of the magnetic circuit passes through the first axial stator 41, the second axial stator 42, the gap between the second axial stator 42 and the thrust disk 46 in the Z+ direction, and the thrust disk 46. The first part of the magnetic circuit and the second part of the magnetic circuit go around the thrust disk 46, pass through the shaft 10, the gap between the first radial stator 22 and the shaft 10, and the first radial stator 22, and then form a closed loop.

[0067] The electromagnetic magnetic circuit generated by the first axial coil 43 in the axial direction is as follows: Fig. 9 As shown. Taking the Z-direction magnetic pole as an example, the electromagnetic magnetic field passes through the gap between the second radial stator 23 and the thrust plate 46 in the Z+ direction, the second radial stator 23, the first axial stator 41, the second axial stator 42, the gap between the second axial stator 42 and the thrust plate 46 in the Z+ direction, and finally forms a closed loop on the thrust plate 46 on the rotating shaft 10. It should be understood that the electromagnetic magnetic circuit generated by the first axial coil 43 in the axial direction is only an exemplary description, and the electromagnetic magnetic circuit generated by the first axial coil 43 in the axial direction depends on the specific current flow direction.

[0068] The permanent magnetic circuit generated by the second permanent magnet and the electromagnetic magnetic circuit generated by the first axial coil 43 work together to provide an axial force for the rotating shaft 10. Specifically, when the rotating shaft 10 is axially disturbed, the first axial coil 43 forms a regulating magnetic field by controlling the current, which is superimposed with the bias magnetic field generated by the second permanent magnet to change the strength of the magnetic field in the gap between the thrust plate 46 and the second radial stator 23 and the second axial stator 42, thereby generating an actively adjustable axial electromagnetic force, thereby achieving the adjustment of the axial position of the rotating shaft.

[0069] Furthermore, a first radial floating ring 26 and a first sensor 27 are provided between the first radial stator 22 and the second radial stator 23 of the first magnetic suspension bearing assembly 2. The first radial floating ring 26 and the first sensor 27 are provided inside the first magnetic suspension bearing assembly 2, so as to shorten the axial length of the rotating shaft 10, increase the working speed, and reduce the overall volume of the spinning machine. Since the active magnetic bearing structure has the sensor of the magnetic bearing built inside the magnetic bearing, the axially arranged protective bearing attached to the rotating shaft 10 in the prior art is replaced with the first radial floating ring 26 attached to the first magnetic suspension bearing assembly 2, as well as the first axial floating ring 44 and the second axial floating ring 45, so as to reduce the volume of the spinning machine and thus reduce the cost. Among them, the material of the first radial floating ring 26, the first axial floating ring 44 and the second axial floating ring 45 can be a non-magnetic material such as copper sheet, stainless steel, and a composite material of plastic and graphite.

[0070] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0071] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0072] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0073] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An air spinning machine, characterized in that: include: Air-spinning motor, including: A rotating shaft, wherein an end surface of one end of the rotating shaft in the axial direction is provided with a mounting groove; Two first magnetic bearing assemblies are respectively arranged at two ends of the rotating shaft along the axial direction of the rotating shaft to suspend and support the rotating shaft; A motor stator assembly is sleeved on the outer circumference of the rotating shaft, and along the axial direction of the rotating shaft, the motor stator assembly is located between the two first magnetic bearing assemblies; The rotating shaft is an integral structure in the axial direction, and includes a middle portion and ends located on both sides of the middle portion, the middle portion is arranged opposite to the motor stator assembly, the outer diameter of the middle portion is smaller than the outer diameter of the end portions to form a first groove, a first permanent magnet is arranged on the outer periphery of the middle portion of the rotating shaft, the first permanent magnet is embedded in the first groove, the first permanent magnet is configured as an annular structure, and along the radial direction of the rotating shaft, the first permanent magnet is arranged opposite to the motor stator assembly and spaced apart; A spinning cup, wherein the spinning cup comprises a cup body and a cup rod connected to each other, the cup rod is inserted into the mounting groove, and the cup rod and the mounting groove are in clearance fit; Wherein, the first magnetic bearing assembly comprises: A first transverse stator, wherein the first transverse stator is sleeved on the rotating shaft, and at least a part of the first transverse stator is configured as a second permanent magnet; A first radial stator and a second radial stator, wherein the first radial stator and the second radial stator are both sleeved on the rotating shaft, and along the axial direction of the rotating shaft, the first radial stator and the second radial stator are respectively arranged on both sides of the second permanent magnet; The permanent magnetic leakage magnetic circuit generated by the first magnetic suspension bearing assembly close to the spinning cup side passes through the second permanent magnet-the first radial stator-the magnetic pole gap between the first radial stator and the rotating shaft-the rotating shaft-the cup rod-the cup body-the axial gap between the cup body and the rotating shaft-the rotating shaft-the magnetic pole gap between the second radial stator and the rotating shaft-the second radial stator-the second permanent magnet in sequence, and generates an axial attraction force on the spinning cup through the permanent magnetic leakage magnetic circuit, so that the connection between the spinning cup and the rotating shaft is stable; The main magnetic circuit generated by the first magnetic bearing assembly close to the spinning cup passes through the second permanent magnet-the first radial stator-the magnetic pole gap between the first radial stator and the rotating shaft-the rotating shaft-the cup rod-the rotating shaft-the magnetic pole gap between the second radial stator and the rotating shaft-the second radial stator-the second permanent magnet in sequence, and the main magnetic circuit is formed by the second permanent magnet of the first magnetic bearing assembly close to the spinning cup, thereby generating a radial force on the cup rod.

2. The air spinning machine according to claim 1, characterized in that: The first radial stator includes a first yoke and a first magnetic pole, and the second radial stator includes a second yoke and a second magnetic pole. Along the axial direction of the rotating shaft, the first yoke is sleeved on the rotating shaft, the first magnetic pole is connected to the first yoke and extends toward the rotating shaft along the radial direction of the rotating shaft, the second yoke is sleeved on the rotating shaft, the second magnetic pole is connected to the second yoke and extends toward the rotating shaft along the radial direction of the rotating shaft, and the first yoke and the second yoke are respectively arranged on both sides of the second permanent magnet.

3. The air spinning machine according to claim 2, characterized in that: The first magnetic bearing assembly further includes a first radial coil and a second radial coil. The first radial coil is wound around the first magnetic pole, and the second radial coil is wound around the second magnetic pole.

4. The air spinning machine according to claim 2, characterized in that: The second radial stator is configured as a magnetic conductive ring, and the first magnetic bearing assembly further includes a first radial coil, which is wound around the first radial stator.

5. The air spinning machine according to claim 2, characterized in that: The first magnetic bearing assembly further includes a first radial floating ring, and along the axial direction of the rotating shaft, the first radial floating ring is arranged between the first radial stator and the second radial stator; Along the radial direction of the rotating shaft, the inner end of the first radial floating ring protrudes from the inner end of the first radial stator, and the inner end of the first radial floating ring protrudes from the inner end of the second radial stator.

6. The air spinning machine according to claim 5, characterized in that: The first magnetic bearing assembly further includes a first sensor. The first sensors are multiple and are arranged on the first radial floating ring at intervals along the radial direction of the rotating shaft. The multiple first sensors are used to detect the radial offset state of the rotating shaft.

7. The air spinning machine according to claim 1, characterized in that: Along the radial direction of the rotating shaft, the cup rod is arranged opposite to the first magnetic bearing assembly close to the spinning cup.

8. The air spinning machine according to claim 1, characterized in that: The air-spinning motor further comprises a first axial stator, a second axial stator and a first axial coil. Along the axial direction of the rotating shaft, a first magnetic bearing assembly away from the spinning cup is connected to one end of the first axial stator, the second axial stator is connected to the other end of the first axial stator and extends toward the rotating shaft, and the first axial coil is arranged between the first magnetic bearing assembly away from the spinning cup and the second axial stator. A thrust plate is arranged on the rotating shaft, and at least a part of the thrust plate extends between the second axial stator and the first magnetic bearing assembly far away from the spinning cup.

9. The air spinning machine according to claim 8, characterized in that: The air-spinning motor also includes a first axial floating ring and a second axial floating ring. Along the axial direction of the rotating shaft, the first axial floating ring is arranged between the first magnetic bearing assembly away from the spinning cup and the thrust plate, and the second axial floating ring is arranged between the thrust plate and the second axial stator.

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