A method for implementing a low-noise electric spindle of a fine spinning machine

Abstract

The application discloses a low-noise fine spinning machine electric spindle implementation method, which comprises a spindle rod, the spindle rod is inserted into the insertion hole in the middle part of the spindle rod support, a first gap is left between the spindle rod and the insertion hole, a magnetic damping mechanism is installed on the inner side wall of the insertion hole, the magnetic damping mechanism generates radial magnetic attraction force on the spindle rod, the bottom of the spindle rod support is provided with a positioning structure matched with the spindle rod, the center lines of the spindle rod, the magnetic damping mechanism and the positioning structure are coaxially arranged, the magnetic damping mechanism and the positioning structure can suppress the vibration of the spindle rod at multiple positions on the spindle rod, the magnetic attraction force generated by the magnetic damping mechanism laterally pulls the spindle rod, limits the circumferential range of the contact between the moving spindle rod and the needle bearing, and the shaking amplitude of the spindle rod during high-speed rotation is relatively small, so that the noise is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric spindle of spinning frame, in particular to a realization method of low-noise electric spindle of spinning frame. BACKGROUND

[0002] At present, electric spindle is widely used in spinning frame, and the existing electric spindle generally comprises a spindle rod, a motor stator core, a motor outer rotor magnetic steel, a motor outer rotor shell and a spindle foot. Among them, the spindle rod is combined with the motor outer rotor shell as a whole, and is fixed by the bearing 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 process of using the electric spindle, the spindle rod will vibrate due to high-speed operation in actual working conditions, resulting in high noise, increased energy consumption and reduced operating efficiency. Therefore, a structure is needed to reduce the vibration of the spindle rod. At present, there are some schemes that use magnetic damping to reduce the vibration of the spindle rod, such as Chinese patents CN104294426A, CN1908264A and CN104313739A. In these patents, the principle of same polarity repulsion is used to keep the spindle rod in the center position and reduce the vibration. However, this method has the disadvantage that the magnetic force of same polarity repulsion is often not large enough. For the spindle rod that rotates at high speed and is subjected to lateral force, only the magnetic force of same polarity repulsion cannot effectively reduce the vibration of the spindle rod during rotation. Therefore, a new way is needed to effectively reduce the vibration of the spindle rod during rotation and thus reduce the noise of the electric spindle during operation. SUMMARY

[0003] The present application provides a realization method of low-noise electric spindle of spinning frame, which can effectively suppress the vibration of the spindle rod, reduce the vibration amplitude and noise during the operation of the electric spindle of the spinning frame.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a realization method of low-noise electric spindle of spinning frame, which comprises a spindle rod. The spindle rod is inserted into the insertion hole in the middle of the spindle rod support in the axial direction. A first gap is left between the spindle rod and the insertion hole. A magnetic damping mechanism is installed on the inner side wall of the insertion hole. The magnetic damping mechanism generates a radial magnetic attraction force on the spindle rod. A positioning structure matching the spindle rod is arranged at the bottom of the spindle rod support. The center lines of the spindle rod, the magnetic damping mechanism and the positioning structure are coaxially arranged. By arranging the magnetic damping mechanism and the positioning structure, the vibration of the spindle rod can be suppressed at multiple positions on the spindle rod. Moreover, the magnetic attraction force generated by the magnetic damping mechanism laterally pulls the spindle rod, limiting the circumferential range of the moving spindle rod in contact with the roller bearing, so that the amplitude of the shaking of the spindle rod during high-speed rotation is small, thereby achieving the effect of reducing noise.

[0005] Preferably, the magnetic damping mechanism comprises a copper ring, two iron cores arranged axially along the inner side of the copper ring, and a permanent magnet arranged between the two iron cores, the limiting steps on the upper and lower end faces of the copper ring facilitate the fixation of the iron cores, the two iron cores are in close contact with the permanent magnet in the axial direction, the magnetic gathering effect is generated by the two iron cores, the permanent magnet can generate a relatively strong magnetic field, thereby forming a relatively large magnetic attraction force acting on the spindle.

[0006] Preferably, the magnetic attraction force generated by the magnetic damping mechanism on the spindle can be adjusted, and the resultant force formed by the magnetic attraction force and the yarn tension on the upper part of the spindle can be controlled, so as to adjust the circumferential range of the moving spindle in contact with the needle bearing, thereby achieving the goal of reducing energy consumption, vibration and noise, and the size of the magnetic attraction force can be adjusted by replacing the iron cores and increasing or decreasing the number of permanent magnets.

[0007] Preferably, the permanent magnet is arranged around the inner circumferential surface of the copper ring, which can make the magnetic field generated by the permanent magnet more uniform.

[0008] Preferably, the magnetic damping mechanism is installed axially directly below the bearing between the spindle and the spindle support, and the bearing plays a guiding role when the spindle is inserted, thereby protecting the magnetic damping mechanism.

[0009] Preferably, the N and S poles of the permanent magnet are arranged in the axial direction of the copper ring, which can improve the amplification effect of the copper ring and the iron core on the magnetic field, make full use of the limited space, and also be beneficial to the processing of the magnetic steel.

[0010] Preferably, the upper outer side of the spindle support is provided with a stator core, the outer side of the stator core is provided with a motor outer rotor shell linked with the spindle, and a rotor magnetic ring is installed on the inner side wall of the motor outer rotor shell corresponding to the stator core, so that the spindle and the motor structure are integrated, the spindle can rotate at high speed and the resistance is relatively small.

[0011] Preferably, the spindle support is a spindle foot, the magnetic damping mechanism is fixedly installed on the inner side wall of the spindle foot, and the stator core is installed on the outer side wall of the spindle foot, so that the spindle foot can meet the stable support of the spindle.

[0012] Preferably, the spindle support comprises a spindle foot and a spindle core arranged in the spindle foot, the spindle core is columnar, the magnetic damping mechanism is fixedly installed on the inner side wall of the spindle core, and the stator core is installed on the outer side wall of the spindle core, so that the strength of the spindle support composed of the spindle foot and the spindle core is relatively large.

[0013] Preferably, the positioning structure is a positioning hole set at the bottom of the spindle support. A second gap is left between the lower end of the spindle and the side wall of the positioning hole. The positioning hole is directly set at the bottom of the spindle support, which is simple and reliable. Part of the structure at the lower end of the spindle is inserted into the positioning hole, which can prevent the spindle from shaking too much. The second gap allows the spindle to float slightly without friction with the positioning hole, thus reducing noise.

[0014] Preferably, the positioning structure is a positioning ring set in the spindle support. A second gap is left between the lower end of the spindle and the inner wall of the positioning ring. The positioning ring can be installed independently and replaced according to different spindles. The second gap also allows the spindle to float slightly without friction with the positioning ring, thus reducing noise.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] By setting up a magnetic damping mechanism and positioning structure, the vibration of the spindle can be suppressed at multiple positions on the spindle. The magnetic damping mechanism utilizes a combination design of permanent magnets and two iron cores to generate a relatively strong magnetic field, thereby forming a relatively large radial magnetic attraction force on the spindle, pulling the spindle from the side upwards. By adjusting the magnitude of the magnetic attraction force, the circumferential range of contact between the spindle and the needle roller bearing can be controlled, so that the amplitude of swaying is relatively small when it rotates at high speed. It has good versatility and can be used on various spindles, effectively solving the problem that current spinning machine spindles cannot effectively suppress spindle vibration and reduce vibration amplitude and noise during operation. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the first structure of the present invention;

[0018] Figure 2 for Figure 1 AA-direction sectional view of the structure;

[0019] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0020] Figure 4 for Figure 1 Enlarged structural diagram at point C;

[0021] Figure 5 This is a cross-sectional view of the second structure of the present invention;

[0022] Figure 6 for Figure 5 AA-direction sectional view of the structure;

[0023] Figure 7 for Figure 5 Enlarged structural diagram at point C.

[0024] Figure label:

[0025] 1. Spindle rod, 2. Stator core, 3. Rotor magnetic ring, 4. Motor outer rotor housing, 5. Magnetic damping mechanism, 6. Spindle foot, 7. Spindle core, 8. Copper ring, 9. Permanent magnet, 10. Iron core, 11. Positioning ring, 12. Insertion hole, A. Second gap. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] like Figures 1-7 As shown, this invention addresses the problem that current spinning machine spindles cannot effectively suppress spindle vibration, reduce vibration amplitude, and reduce noise during operation. The invention provides the following technical solution: a method for achieving a low-noise spinning machine spindle, comprising a spindle 1 inserted axially into a socket 12 in the middle of a spindle support member, with a first gap between the spindle 1 and the socket 12. A magnetic damping mechanism 5 is installed on the inner wall of the socket 12, generating a radial magnetic attraction force on the spindle 1. A positioning structure matching the spindle 1 is provided at the bottom of the spindle support member. The centerlines of the spindle 1, the magnetic damping mechanism 5, and the positioning structure are coaxial. By setting the magnetic damping mechanism 5 and the positioning structure, the vibration of the spindle 1 can be suppressed at multiple positions on the spindle 1. Furthermore, the magnetic attraction force generated by the magnetic damping mechanism 5 pulls the spindle 1 laterally, limiting the circumferential range of contact between the moving spindle and the needle roller bearing, thus reducing the amplitude of swaying during high-speed rotation and thereby reducing noise.

[0028] Specifically, the diameter of the insertion hole 12 is larger than that of the spindle 1. The magnetic damping mechanism 5 can be installed in the middle of the insertion hole 12 to apply magnetic attraction to the middle of the spindle 1. This works in conjunction with the positioning structure at the bottom of the spindle 1, thereby effectively reducing the vibration amplitude of the spindle 1. A bearing is installed between the spindle 1 and the spindle support, allowing the spindle 1 to rotate freely at high speed. The magnetic damping mechanism 5 can be located on the lower side of the bearing, which can improve the support stability of the spindle support for the spindle 1. At the same time, the bearing plays a guiding role when the spindle is inserted, protecting the magnetic damping mechanism.

[0029] The center lines of the spindle 1, the magnetic damping mechanism 5 and the positioning structure are coaxially arranged to achieve the limiting effect on the spindle 1, so that the spindle 1 remains in an upright state. Compared with the repulsive magnetic force used to apply pressure on the spindle 1, the magnetic attraction force in the embodiment is equivalent to a wire that laterally pulls the spindle 1. When the yarn cylinder on the spindle 1 is subjected to lateral tension, the size of the magnetic attraction force can be adjusted to adjust the circumferential range of the contact between the spindle and the needle bearing. The positioning structure at the bottom of the spindle 1 can also prevent the spindle 1 from producing a relatively large deviation amplitude.

[0030] In the embodiment, the magnetic attraction force generated by the magnetic damping mechanism 5 on the spindle can be adjusted to control the resultant force formed by the magnetic attraction force and the yarn tension on the upper part of the spindle, so as to adjust the circumferential range of the contact between the moving spindle 1 and the needle bearing, thereby achieving the goal of reducing energy consumption, vibration and noise. The size of the magnetic attraction force can be adjusted by replacing the iron core and increasing or decreasing the number of permanent magnets.

[0031] In the embodiment, as shown in Figures 2-3 The magnetic damping mechanism 5 includes a copper ring 8, two iron cores 10 arranged axially along the inner side of the copper ring 8, and a permanent magnet 9 arranged between the two iron cores 10. The permanent magnet 9, the spindle 1 and the iron core 10 can jointly form a magnetic field closed circulation loop. The permanent magnet 9 and the two iron cores 10 can generate a relatively strong magnetic field. The iron core 10 and the copper ring 8 amplify the magnetic force, thereby forming a relatively large magnetic attraction force acting on the spindle 1.

[0032] The permanent magnet 9 is arranged around the inner circumferential surface of the copper ring 8, which can make the magnetic field formed by the permanent magnet 9 more uniform. Meanwhile, the N and S poles of the permanent magnet 9 are arranged axially along the copper ring 8, which can improve the amplification effect of the copper ring 8 and the iron core 10 on the magnetic field. As shown in Figure 3 The permanent magnet 9 can be arranged with the N pole facing upward and the S pole facing downward.

[0033] Meanwhile, the magnetic damping mechanism 5 is installed directly below the axial direction of the bearing, and the bearing plays a guiding role when the spindle is inserted, thereby protecting the magnetic damping mechanism 5.

[0034] As shown in Figure 1 and 5 The upper outer side of the spindle support is provided with a stator core 2. The outer side of the stator core 2 is provided with a motor outer rotor shell 4 linked with the spindle 1. The inner side wall of the motor outer rotor shell 4 is provided with a rotor magnetic ring 3 corresponding to the stator core 2. The spindle and the motor structure are integrated, so that the spindle 1 can rotate at a high speed and the resistance is relatively small.

[0035] As a structure of the spindle support in the embodiment, as shown in Figure 1As shown in the figure, the spindle support member is spindle foot 6, the magnetic damping mechanism 5 is fixedly installed on the inner side wall of the spindle foot 6, and the stator core 2 is installed on the outer side wall of the spindle foot 6. The spindle foot 6 as the mounting support part of the electric spindle can satisfy the stable support effect on the spindle 1, and the spindle foot 6 as a single part supports the spindle 1, and the assembly is simple and convenient.

[0036] During installation, the motor outer rotor shell 4 is first installed on the inner wall of the rotor magnetic ring 3, then the stator core 2 is installed on the outer wall of the spindle foot 6, the permanent magnet 9, the copper ring 8 and the iron core 10 are installed on the inner wall of the spindle foot 6 to form the magnetic damping mechanism 5, the motor outer rotor shell 4 is combined with the spindle 1 as a whole, and finally the spindle 1 is inserted into the spindle foot 6 and positioned by the hole reserved at the bottom center of the spindle foot 6.

[0037] As another structure of the spindle support member in the embodiment, as shown in the figure, Figure 5 As shown in the figure, the spindle support member includes the spindle foot 6 and the spindle barrel 7 arranged inside the spindle foot 6, the spindle barrel 7 is in a columnar shape, the magnetic damping mechanism 5 is fixedly installed on the inner side wall of the spindle barrel 7, and the stator core 2 is installed on the outer side wall of the spindle barrel 7. The strength of the spindle support member composed of the spindle foot 6 and the spindle barrel 7 is relatively large.

[0038] In the embodiment, as a specific structure of the positioning structure, as shown in the figure, Figure 4 As shown in the figure, the positioning structure is a positioning hole arranged at the bottom of the spindle support member, a second gap A is left between the lower end of the spindle 1 and the side wall of the positioning hole, the positioning hole is directly arranged at the bottom of the spindle support member, and the structure is simple and reliable. Part of the lower end of the spindle 1 is inserted into the positioning hole, the spindle 1 can be prevented from shaking greatly, the second gap A allows the spindle 1 to float slightly, friction between the spindle 1 and the positioning hole is avoided, and thus noise is reduced.

[0039] In the embodiment, as another specific structure of the positioning structure, as shown in the figure, Figure 7 As shown in the figure, the positioning structure is a positioning ring 11 arranged at the spindle support member, a second gap A is left between the lower end of the spindle 1 and the inner side wall of the positioning ring 11, the positioning ring 11 can be independently installed and replaced according to different spindles 1, and the second gap A also allows the spindle 1 to float slightly, friction between the spindle 1 and the positioning ring 11 is avoided, and thus noise is reduced.

[0040] 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 and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0041] In addition, the descriptions in the present application such as "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. 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, for example, two, three, etc., unless otherwise specifically defined.

[0042] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, 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 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.

[0043] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, 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, nor within the scope of protection required by the present application.

Claims

1. A method for realizing a low-noise electric spindle of a spinning frame, comprising: a spindle rod (1) inserted into a hole (12) in the middle of a spindle support along the axial direction, a first gap being left between the spindle rod (1) and the hole (12), characterized in that a magnetic damping mechanism (5) is installed on the inner side wall of the hole (12), the magnetic damping mechanism (5) generates a radial magnetic attraction force on the spindle rod (1), the bottom of the spindle support is provided with a positioning structure matching the spindle rod (1), the center lines of the spindle rod (1), the magnetic damping mechanism (5) and the positioning structure are coaxially arranged, the magnetic damping mechanism (5) comprises a copper ring (8), two iron cores (10) arranged along the axial direction of the inner side of the copper ring (8) and a permanent magnet (9) arranged between the two iron cores (10), the permanent magnet (9) is arranged around the inner side circumference of the copper ring (8); the N and S poles of the permanent magnet (9) are arranged along the axial direction of the copper ring (8), the magnetic damping mechanism (5) is installed directly below the axial direction of the bearing between the spindle rod (1) and the spindle support; a stator core (2) is installed on the outer side of the upper part of the spindle support, a motor outer rotor shell (4) linked with the spindle rod (1) is arranged on the outer side of the stator core (2), a rotor magnetic ring (3) is installed on the inner side wall of the motor outer rotor shell (4) at a position corresponding to the stator core (2). The spindle support is a spindle foot (6), the magnetic damping mechanism (5) is fixedly installed on the inner side wall of the spindle foot (6), and the stator core (2) is installed on the outer side wall of the spindle foot (6). The spindle support comprises a spindle foot (6) and a spindle core (7) arranged inside the spindle foot (6), the spindle core (7) is columnar, the magnetic damping mechanism (5) is fixedly installed on the inner side wall of the spindle core (7), and the stator core (2) is installed on the outer side wall of the spindle core (7). The positioning structure is a positioning hole arranged at the bottom of the spindle support, and a second gap (A) is left between the lower end of the spindle rod (1) and the side wall of the positioning hole.

2. A method of implementing an electric spindle for a low noise ring spinning frame according to claim 1, characterized in that: The positioning structure is a positioning ring (11) arranged on the spindle support, and a second gap (A) is left between the lower end of the spindle rod (1) and the inner side wall of the positioning ring (11).

3. A method of implementing a low noise ring frame motor spindle as claimed in claim 1, characterized in that: ​ 4. A method of implementing a low noise ring frame motor spindle as claimed in claim 1, wherein: ​ 5. A method of implementing a low noise ring frame motor spindle as claimed in claim 1, wherein: ​

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