A method for implementing a magnetic suspension-based electric spindle of a spinning frame

Abstract

The application discloses a kind of based on magnetic suspension's fine spinning machine electric spindle implementation method, its structure includes spindle, spindle is inserted into the insertion hole of the middle part of spindle support along its axial direction, the upper outer side of spindle support is equipped with stator core, the outer side of stator core is provided with motor outer rotor shell linked with spindle, the inner side wall of motor outer rotor shell is equipped with rotor magnetic ring in the position corresponding with stator core, the inner side wall of motor outer rotor shell is also provided with magnetic suspension mechanism, the upper outer side of spindle support is equipped with the core corresponding with magnetic suspension mechanism, wherein the axial center height of magnetic suspension mechanism is lower than the axial center height of core but higher than the axial bottom height of core, and the magnetic field generated by magnetic suspension mechanism generates the attractive force of opposite sex to core, so that spindle keeps suspended state.The application can solve the problem that the magnetic suspension structure of the present fine spinning machine electric spindle cannot effectively keep the spindle in a suspended state during operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spinning frame electric spindle, in particular to a realization method of spinning frame electric spindle based on magnetic suspension. BACKGROUND

[0002] At present, electric spindles are widely used in spinning frames, and the existing electric spindles generally include a spindle rod, a motor stator core, a motor outer rotor magnetic steel, a motor outer rotor shell and a spindle foot, etc. Among them, the spindle rod and the motor outer rotor shell are combined as a whole, and are fixed by bearings in the upper sleeve of the spindle foot. In this way, the motor outer rotor magnetic steel and the motor stator core form the rotor and the stator of the motor, so that the spindle and the motor are integrated, and the operation of the spindle is controlled by the control system to control the operation of the spindle. However, in the use process of the electric spindle, there is a large mechanical frictional resistance between the bottom of the spindle rod and the supporting surface in the spindle core, which is not conducive to reducing energy consumption and overcoming mechanical wear. Therefore, a structure is needed to reduce the mechanical frictional resistance between the spindle rod and the supporting surface at the bottom. At present, there are schemes for reducing the frictional resistance of the bottom of the spindle rod by using magnetic suspension structure, such as Chinese patents CN103510206B, CN203451701U and CN203546266U, which all use the principle of same repulsion to lift the spindle rod upward to reduce the frictional resistance at the bottom. However, this method has the disadvantage that the repulsion generated by the same repulsion magnetic ring in a relatively small space is not large enough, and for the spindle rod which rotates at high speed and is subjected to lateral tension, only the same repulsion magnetic force cannot effectively support and lift the spindle rod. Therefore, a new way is needed to effectively keep the spindle rod in a suspended state. SUMMARY

[0003] The present application provides a realization method of spinning frame electric spindle based on magnetic suspension, which can solve the problems that the magnetic suspension structure of the existing spinning frame electric spindle cannot effectively keep the spindle rod in a suspended state during work, and the rotation vibration amplitude and noise of the existing electric spindle are relatively large.

[0004] In order to achieve the above object, the application provides the following technical scheme: a kind of implementation method of fine spinning machine electric spindle based on magnetic suspension, its structure includes spindle, the spindle is inserted into the insertion hole in the middle of spindle support, the upper outer side of the spindle support is equipped with stator core, the outer side of the stator core is provided with motor outer rotor shell linked with spindle, the inner side wall of the motor outer rotor shell is equipped with rotor magnetic ring corresponding to stator core, the inner side wall of the motor outer rotor shell is also provided with magnetic suspension mechanism, the upper outer side of the spindle support is equipped with core corresponding to magnetic suspension mechanism, wherein the axial center height of magnetic suspension mechanism is lower than the axial center height of core but higher than the axial bottom height of core, the magnetic field generated by the magnetic suspension mechanism generates the attractive force of opposite sex to the core to keep the spindle in suspended state, avoids the sliding friction of spindle and insertion hole inner bottom support surface when motor high-speed operation, reduces the vibration amplitude, so that the electric spindle has the advantages of small mechanical wear, low power consumption and small noise, compared with the existing magnetic suspension structure using magnetic same sex repulsion, more material saving, can generate greater suction force to make the spindle float.

[0005] As preferred, the magnetic suspension mechanism includes a copper ring, two magnetic suspension cores arranged axially along the inner side of the copper ring, and a magnetic ring arranged between the two magnetic suspension cores. The two cores are in close contact with the permanent magnets in the axial direction. The two magnetic suspension cores generate a magnetic concentration effect, and the magnetic ring can generate a relatively strong magnetic field, thereby forming a relatively large magnetic attraction force acting on the core.

[0006] As preferred, the radial outer side of the core is provided with a radial boss corresponding to the magnetic suspension core. The radial boss can be close to the magnetic suspension core to generate a relatively large attractive force.

[0007] As preferred, the radial inner side wall of the magnetic suspension core and the radial outer side wall of the radial boss are both provided with comb teeth. When the height difference between the magnetic suspension mechanism and the core changes, the magnetic force changes more quickly, keeping the spindle in a floating state.

[0008] As preferred, the bottom of the insertion hole is provided with a positioning ring. The spindle is inserted into the positioning ring, and a gap is left between the lower end of the spindle and the bottom of the positioning ring. The positioning ring can limit the lower end of the spindle, so that the spindle does not shake too much when rotating, and the lower end of the spindle has enough axial space when it is floating.

[0009] As preferred, a gap is left between the outer side of the spindle and the inner hole side wall of the positioning ring, which can reduce the friction when the spindle rotates, reduce the generation of noise, and make the rotation of the spindle more stable.

[0010] As preferred, the magnetic suspension mechanism is arranged above the rotor magnetic ring, the iron core is arranged above the stator iron core, the space between the rotor magnetic ring and the spindle support is effectively utilized, and the magnetic suspension mechanism is closer to the yarn cylinder at the upper end of the spindle, and the magnetic suspension effect is better.

[0011] As preferred, the axial width of the rotor magnetic ring is greater than the axial width of the stator iron core, so that the stator iron core is always within the width range of the rotor magnetic ring when the position of the stator iron core changes.

[0012] As preferred, the spindle support is a spindle leg, and the iron core and the stator iron core are fixedly installed on the outer side wall of the spindle leg, so that the spindle leg is used as an integrated spindle support, and assembly is simple and low in requirement.

[0013] As preferred, the spindle support comprises a spindle leg and a spindle barrel arranged in the spindle leg, the spindle barrel is columnar, and the iron core and the stator iron core are fixedly installed on the outer side wall of the spindle barrel, so that the strength of the spindle support composed of the spindle leg and the spindle barrel is greater.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] The magnetic suspension mechanism and the iron core are arranged between the motor outer rotor shell and the spindle support, the magnetic field generated by the magnetic suspension mechanism generates an attractive force of opposite polarity on the iron core to keep the spindle in a suspended state, thereby avoiding sliding friction between the spindle and the support surface at the bottom of the insertion hole during high-speed operation of the motor, reducing the vibration amplitude, and making the electric spindle have the advantages of small mechanical wear, low power consumption and small noise.

[0016] The radial boss corresponding to the magnetic suspension iron core is arranged on the iron core, and the comb tooth part is arranged on the radial end face of the magnetic suspension iron core and the radial boss, so that when the height difference between the magnetic suspension mechanism and the iron core changes, the magnetic force can change more quickly to keep the spindle in a floating state.

[0017] The positioning ring arranged at the bottom of the insertion hole can limit the lower end of the spindle, so that the spindle does not shake too much when rotating, and the lower end of the spindle has sufficient axial space when floating. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a sectional view of the first structure of the present application;

[0019] Figure 2 is an enlarged structure view of A of Figure 1

[0020] Figure 3 is an enlarged structure view of C of Figure 1 ​​

[0021] Figure 4 A sectional view of the second structure of the present application;

[0022] Reference signs:

[0023] 1, spindle, 2, core, 21, radial boss, 3, magnetic suspension mechanism, 31, magnetic suspension core, 32, magnetic ring, 33, copper ring, 34, comb tooth part, 4, rotor magnetic ring, 5, motor outer rotor shell, 6, stator core, 7, spindle foot, 8, spindle core, 9, positioning ring, 10, insertion hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0025] As Figures 1-4 shown, the present application can solve the problems that the magnetic suspension structure of the current electric spindle of a spinning frame cannot effectively keep the spindle in a suspended state during operation and the current electric spindle has a large vibration amplitude and noise, and provides the following technical solution: an implementation method of a magnetic suspension-based electric spindle of a spinning frame, which comprises a spindle 1, the spindle 1 is inserted into an insertion hole 10 in the middle of a spindle support in the axial direction, an outer side of an upper part of the spindle support is provided with a stator core 6, an outer side of the stator core 6 is provided with a motor outer rotor shell 5 linked with the spindle 1, a position on an inner side wall of the motor outer rotor shell 5 corresponding to the stator core 6 is provided with a rotor magnetic ring 4, the inner side wall of the motor outer rotor shell 5 is further provided with a magnetic suspension mechanism 3, an outer side of the upper part of the spindle support is provided with a core 2 corresponding to the magnetic suspension mechanism 3, wherein the axial center height of the magnetic suspension mechanism 3 is lower than the axial center height of the core 2 but higher than the axial bottom height of the core 2, the magnetic field generated by the magnetic suspension mechanism 3 generates an attractive force of different natures on the core 2 to keep the spindle 1 in a suspended state, which avoids the sliding friction between the spindle 1 and the bottom support surface in the insertion hole 10 when the motor is running at a high speed, reduces the vibration amplitude, and thus the electric spindle has the advantages of small mechanical wear, low power consumption and small noise, and compared with the existing magnetic suspension structure using magnetic repulsion of the same nature, the present application can save more materials and generate a greater attractive force to keep the spindle 1 suspended.

[0026] Specifically, the diameter of the insertion hole 10 is greater than that of the spindle 1, a bearing is installed in the insertion hole 10, the spindle 1 passes through the bearing, the spindle 1 and the bearing are in clearance fit, and the bearing plays a guiding role to prevent the spindle 1 from shaking and vibrating greatly when rotating.

[0027] The traditional magnetic suspension structure is to realize suspension by repulsive force between two corresponding magnetic components in axial direction, which is equivalent to using repulsive force to lift up the upper magnetic component to realize suspension. In the embodiment, the magnetic suspension mechanism 3 and the iron core 2 are arranged in radial direction, instead of the traditional axial arrangement. Since the attraction force is generated between the magnetic suspension mechanism 3 and the iron core 2, the attraction force generated by the magnetic field of the magnetic suspension mechanism 3 is equivalent to a pull rope to pull the iron core 2, and the magnetic suspension mechanism 3, the motor outer rotor shell 5 and the spindle 1 are suspended by the reaction force. Since the attraction force is generated between the magnetic suspension mechanism 3 and the iron core 2, there is a height difference between the magnetic field and the iron core 2, so the axial center height of the magnetic suspension mechanism 3 is lower than the axial center height of the iron core 2. However, the iron core 2 cannot be out of the induction range of the magnetic suspension mechanism 3, and the height difference cannot be too large, so the axial center height of the magnetic suspension mechanism 3 needs to be higher than the axial bottom height of the iron core 2.

[0028] In the embodiment, as shown in Figure 2 Fig. 3, as a specific embodiment of the magnetic suspension mechanism 3, the magnetic suspension mechanism 3 comprises a copper ring 33, two magnetic suspension iron cores 31 arranged in axial direction along the inner side of the copper ring 33, and a magnetic ring 32 arranged between the two magnetic suspension iron cores 31. The two iron cores are in close contact with the permanent magnet in axial direction. The magnetic suspension iron cores 31 generate magnetic concentration effect. The magnetic ring 32 can generate relatively strong magnetic field, so that the magnetic attraction force acting on the iron core 2 is relatively large, and the iron core 2 and the magnetic suspension mechanism 3 can form relatively reliable pulling force.

[0029] Meanwhile, as shown in Figure 2 Fig. 4, the radial outer side of the iron core 2 is provided with a radial boss 21 corresponding to the magnetic suspension iron core 31. The radial boss 21 can be close to the magnetic suspension iron core 31 to generate relatively large attraction force. The radial inner side wall of the magnetic suspension iron core 31 and the radial outer side wall of the radial boss 21 are both provided with comb teeth 34. When the height difference between the magnetic suspension mechanism 3 and the iron core 2 changes, the magnetic force can change more quickly, so that the spindle 1 can be kept in floating state, and the position of the magnetic suspension iron core 31 will not change greatly.

[0030] In the embodiment, in order to limit the lower end of the spindle 1, the bottom of the insertion hole 10 is provided with a positioning ring 9. The spindle 1 is inserted into the positioning ring 9, and there is a gap between the lower end of the spindle 1 and the bottom of the positioning ring 9. The positioning ring 9 can limit the lower end of the spindle 1, so that the spindle 1 will not shake greatly when rotating. Meanwhile, there is enough axial space for the lower end of the spindle 1 when the spindle 1 is in floating suspension state. There is a gap between the outer side of the spindle 1 and the inner hole side wall of the positioning ring 9, which can reduce the friction of the spindle 1 when rotating, reduce the generation of noise, and make the rotation of the spindle 1 more stable.

[0031] In the embodiment, as shown in Figure 1 and 4 The magnetic suspension mechanism 3 is arranged above the rotor magnetic ring 4, and the iron core 2 is arranged above the stator iron core 6, the space between the rotor magnetic ring 4 and the spindle support is effectively utilized, and the magnetic suspension mechanism 3 is closer to the yarn cylinder at the upper end of the spindle 1, and the magnetic suspension effect is better. At the same time, the axial width of the rotor magnetic ring 4 is greater than the axial width of the stator iron core 6, so that the stator iron core 6 is always within the width range of the rotor magnetic ring 4 when the position of the stator iron core 6 changes.

[0032] In the embodiment, as the first structure of the spindle support, as shown in Figure 4 The spindle support is a spindle foot 7, and the iron core 2 and the stator iron core 6 are fixedly installed on the outer side wall of the spindle foot 7, the spindle foot 7 is used as an integrated spindle support, and assembly is simple and requires low.

[0033] In the embodiment, as the second structure of the spindle support, as shown in Figure 1 The spindle support includes the spindle foot 7 and a spindle barrel 8 arranged inside the spindle foot 7, the spindle barrel 8 is in a columnar shape, the iron core 2 and the stator iron core 6 are fixedly installed on the outer side wall of the spindle barrel 8, and the spindle support composed of the spindle foot 7 and the spindle barrel 8 has relatively large strength.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0035] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0036] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

Claims

1. A method for implementing a magnetic levitation based electric spindle of a spinning frame, comprising: a spindle rod (1) inserted into a hole (10) in the middle of a spindle support along the axial direction, characterized in that an outer side of an upper part of the spindle support is provided with a stator core (6), an outer side of the stator core (6) is provided with a motor outer rotor shell (5) linked with the spindle rod (1), an inner side wall of the motor outer rotor shell (5) is provided with a rotor magnetic ring (4) at a position corresponding to the stator core (6), the inner side wall of the motor outer rotor shell (5) is further provided with a magnetic levitation mechanism (3), an outer side of an upper part of the spindle support is provided with a core (2) corresponding to the magnetic levitation mechanism (3), an axial center height of the magnetic levitation mechanism (3) is lower than an axial center height of the core (2) but higher than an axial bottom height of the core (2), and a magnetic field generated by the magnetic levitation mechanism (3) generates an attractive force of different polarity on the core (2) to keep the spindle rod (1) in a levitated state. The magnetic levitation mechanism (3) comprises a copper ring (33), two magnetic levitation cores (31) arranged along the axial direction of the inner side of the copper ring (33), and a magnetic ring (32) arranged between the two magnetic levitation cores (31). An outer radial side of the core (2) is provided with a radial boss (21) corresponding to the magnetic levitation core (31), and a radial inner side wall of the magnetic levitation core (31) and a radial outer side wall of the radial boss (21) are both provided with a comb tooth part (34). A bottom of the hole (10) is provided with a positioning ring (9), the spindle rod (1) is inserted into the positioning ring (9), and a gap is left between the lower end of the spindle rod (1) and the bottom of the positioning ring (9).

2. A method of implementing a magnetic levitation based electric spindle for a spinning frame as claimed in claim 1, wherein: A gap is left between the outer side of the spindle rod (1) and the inner hole side wall of the positioning ring (9).

3. The implementation of a magnetic levitation based electric spindle for a spinning frame according to claim 1 characterized in that: The magnetic levitation mechanism (3) is arranged above the rotor magnetic ring (4), and the core (2) is arranged above the stator core (6).

4. The implementation of a magnetic levitation based electric spindle for a spinning frame according to claim 1 characterized in that: An axial width of the rotor magnetic ring (4) is greater than an axial width of the stator core (6).

5. The implementation of a magnetic levitation based electric spindle for a spinning frame according to claim 1 characterized in that: The spindle support is a spindle foot (7), and the core (2) and the stator core (6) are both fixedly installed on the outer side wall of the spindle foot (7).

6. The implementation of a magnetic levitation based electric spindle for a spinning frame according to claim 1 characterized in that: The spindle support comprises the spindle foot (7) and a spindle barrel (8) arranged inside the spindle foot (7), the spindle barrel (8) is columnar, and the core (2) and the stator core (6) are both fixedly installed on the outer side wall of the spindle barrel (8).

7. The implementation of a magnetic levitation based electric spindle for a spinning frame according to claim 1 characterized in that: ​

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