Implementation method of low-noise spinning frame electric spindle

Abstract

The low-noise spinning frame electric spindle comprises a spindle blade, the spindle blade is inserted into an insertion hole in the middle of a spindle blade supporting piece in the axial direction of the spindle blade, a first gap is reserved between the spindle blade and the insertion hole, and 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 blade, a positioning structure matched with the spindle blade is arranged at the bottom of the spindle blade supporting piece, and the central lines of the spindle blade, the magnetic damping mechanism and the positioning structure are coaxially arranged. By arranging the magnetic damping mechanism and the positioning structure, vibration of the spindle blade can be restrained at multiple positions on the spindle blade, the spindle blade is pulled by magnetic attraction force generated by the magnetic damping mechanism from the side direction, and the circumferential range of contact between the moving spindle blade and the needle bearing is limited; and the shaking amplitude is relatively small during high-speed rotation, so that the effect of reducing noise is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of spinning machine electric spindles, and in particular to a method for realizing a low-noise spinning machine electric spindle. Background Art

[0002] At present, electric spindles are widely used in spinning machines. Existing electric spindles generally include a spindle bar, a motor stator core, a motor outer rotor magnet, a motor outer rotor housing, and a spindle foot. Among them, the spindle bar is integrated with the motor outer rotor housing and fixed by the bearing in the upper sleeve of the spindle foot. In this way, the motor outer rotor magnet and the motor stator core constitute the rotor and stator of the motor, so that the spindle and the motor are integrated. The operation of the motor is controlled by the control system to control the operation of the spindle. However, during the use of the electric spindle, the spindle bar will vibrate due to the high-speed operation in actual working conditions, resulting in high noise, increased energy consumption, and reduced operating efficiency. Therefore, a structure that can reduce the vibration of the spindle rod is needed. Currently, there are public solutions that use magnetic damping to reduce the vibration of the spindle rod, such as the Chinese patents with publication numbers CN104294426A, CN1908264A and CN104313739A, which all use the principle of like repulsion to keep the spindle rod in the center position to reduce vibration. However, this method has a disadvantage, that is, the magnetic force of like repulsion is often not large enough. For a spindle rod that rotates at high speed and is subjected to lateral tension, the magnetic force of like repulsion alone cannot effectively reduce the vibration of the spindle rod during rotation. Therefore, a new method is needed to effectively reduce the vibration of the spindle rod during rotation, thereby reducing the noise during the operation of the electric spindle. Summary of the invention

[0003] The present invention provides a method for realizing a low-noise spinning machine electric spindle, which can solve the problem that the existing spinning machine electric spindle cannot effectively suppress the vibration of the spindle rod and reduce the vibration amplitude and noise during operation.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a method for realizing a low-noise spinning machine motor spindle, the structure of which includes a spindle rod, the spindle rod is inserted into the socket in the middle of the spindle rod support along its axial direction, a first gap is left between the spindle rod and the socket, a magnetic damping mechanism is installed on the inner wall of the socket, the magnetic damping mechanism generates a radial magnetic attraction force on the spindle rod, a positioning structure matching the spindle rod is provided 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, and the vibration of the spindle rod can be suppressed at multiple positions on the spindle rod by arranging the magnetic damping mechanism and the positioning structure, and the magnetic attraction force generated by the magnetic damping mechanism pulls the spindle rod from the side, thereby limiting the circumferential range of contact between the moving spindle rod and the needle bearing, so that the shaking amplitude is relatively small when it rotates at high speed, thereby reducing the noise.

[0005] Preferably, the magnetic damping mechanism includes 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 tightly fitted axially with the permanent magnets. The two iron cores are used to produce a magnetic field focusing effect. The permanent magnet can generate a relatively strong magnetic field, thereby forming a relatively large magnetic attraction force acting on the ingot rod.

[0006] Preferably, by adjusting the magnetic attraction force generated by the magnetic damping mechanism on the spindle rod, the combined force formed by the magnetic attraction force and the yarn tension on the upper part of the spindle rod can be controlled to adjust the circumferential range of contact between the moving spindle rod and the needle bearing, thereby achieving the goal of reducing energy consumption and reducing vibration and noise. The adjustment of the magnetic attraction force can be achieved by replacing the iron core and increasing or decreasing the number of permanent magnets.

[0007] Preferably, the permanent magnets are arranged around the inner circumference of the copper ring, so that the magnetic field formed by the permanent magnets can be more uniform.

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

[0009] Preferably, the N pole and S pole of the permanent magnet are arranged along 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, while making full use of the limited space and facilitating the processing of the magnetic steel.

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

[0011] Preferably, the ingot rod support is an ingot foot, the magnetic damping mechanism is fixedly mounted on the inner wall of the ingot foot, and the stator core is mounted on the outer wall of the ingot foot. The ingot foot serves as an installation support component for the electric ingot and can provide stable support for the ingot rod.

[0012] Preferably, the ingot rod support comprises an ingot foot and an ingot bladder arranged inside the ingot foot, the ingot bladder is columnar, the magnetic damping mechanism is fixedly mounted on the inner wall of the ingot bladder, and the stator core is mounted on the outer wall of the ingot bladder. The ingot rod support composed of the ingot foot and the ingot bladder is relatively strong.

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

[0014] Preferably, the positioning structure is a positioning ring arranged on the spindle rod support, and a second gap is left between the lower end of the spindle rod and the inner wall of the positioning ring. The positioning ring can be installed independently and replaced according to different spindle rods. The second gap also allows the spindle rod to float slightly without generating friction with the positioning ring, thereby reducing noise.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

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

[0017] Figure 1 It is a cross-sectional structural diagram of the first structure of the present invention;

[0018] Figure 2 for Figure 1 AA section structure diagram;

[0019] Figure 3 for Figure 1 The enlarged structure diagram at B;

[0020] Figure 4 for Figure 1 The enlarged structure diagram at C;

[0021] Figure 5 It is a cross-sectional structural diagram of the second structure of the present invention;

[0022] Figure 6 for Figure 5 AA section structure diagram;

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

[0024] Reference numerals:

[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 gallbladder, 8. Copper ring, 9. Permanent magnet, 10. Core, 11. Positioning ring, 12. Socket, A. Second gap. DETAILED DESCRIPTION

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

[0027] like Figure 1-7 As shown, the present invention provides the following technical solutions to solve the problem that the existing spinning machine electric spindle cannot effectively suppress the vibration of the spindle rod, reduce the vibration amplitude and noise during operation: a method for realizing a low-noise spinning machine electric spindle, the structure of which includes a spindle rod 1, the spindle rod 1 is inserted into the socket 12 in the middle of the spindle rod support along its axial direction, a first gap is left between the spindle rod 1 and the socket 12, a magnetic damping mechanism 5 is installed on the inner side wall of the socket 12, the magnetic damping mechanism 5 generates a radial magnetic attraction force on the spindle rod 1, and a positioning structure matching the spindle rod 1 is provided at the bottom of the spindle rod support. The center lines of the spindle rod 1, the magnetic damping mechanism 5 and the positioning structure are coaxially arranged, and the vibration of the spindle rod 1 can be suppressed at multiple positions on the spindle rod 1 by arranging the magnetic damping mechanism 5 and the positioning structure, and the magnetic attraction force generated by the magnetic damping mechanism 5 pulls the spindle rod 1 from the side, limiting the circumferential range of contact between the moving spindle rod and the needle bearing, so that the amplitude of the shaking is relatively small when it rotates at high speed, thereby reducing the noise.

[0028] Specifically, the diameter of the socket 12 is larger than the spindle rod 1, and the magnetic damping mechanism 5 can be installed in the middle of the socket 12 to apply magnetic attraction to the middle of the spindle rod 1, cooperating with the positioning structure at the bottom of the spindle rod 1, thereby achieving a better effect of reducing the vibration amplitude of the spindle rod 1. A bearing is installed between the spindle rod 1 and the spindle rod support so that the spindle rod 1 can rotate freely at high speed, and the magnetic damping mechanism 5 can be arranged on the lower side of the bearing, which can improve the supporting stability of the spindle rod support for the spindle rod 1. At the same time, the bearing plays a guiding role when the spindle rod is inserted to protect the magnetic damping mechanism.

[0029] The center lines of the spindle rod 1, the magnetic damping mechanism 5 and the positioning structure are coaxially arranged to achieve the limiting effect on the spindle rod 1, so that the spindle rod 1 remains upright. Compared with the use of repulsive magnetic forces to apply pressure to the spindle rod 1, the magnetic attraction force used in this embodiment is equivalent to pulling the spindle rod 1 from the side with a wire. In this way, when the yarn tube on the spindle rod 1 is subjected to lateral tension, the circumferential range of contact between the spindle rod and the needle bearing can be adjusted by setting the size of the magnetic attraction force. The positioning structure at the bottom of the spindle rod 1 can also prevent the spindle rod 1 from having a relatively large offset.

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

[0031] In this embodiment, if Figure 2-3 As shown, the magnetic damping mechanism 5 includes a copper ring 8, two iron cores 10 axially arranged 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 rod 1, the iron core 10 and other components can form a closed magnetic field circulation loop together. 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 have an amplifying effect on the magnetic force, thereby forming a relatively large magnetic attraction force acting on the spindle rod 1.

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

[0033] At the same time, 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 rod is inserted, thereby protecting the magnetic damping mechanism 5.

[0034] like Figure 1 and 5 As shown, a stator core 2 is installed on the outer side of the upper part of the spindle rod support, and a motor outer rotor housing 4 linked to the spindle rod 1 is provided 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 housing 4 at a position corresponding to the stator core 2, so that the spindle rod and the motor structure are integrated, so that the spindle rod 1 can rotate at high speed with relatively small resistance.

[0035] As a structure of the spindle rod support in this embodiment, Figure 1As shown, the ingot rod support is an ingot foot 6, the magnetic damping mechanism 5 is fixedly mounted on the inner wall of the ingot foot 6, and the stator core 2 is mounted on the outer wall of the ingot foot 6. The ingot foot 6 as an installation support component of the electric ingot can meet the function of stably supporting the ingot rod 1. The ingot foot 6 supports the ingot rod 1 as a single component, and the assembly is simple and convenient.

[0036] During installation, first install the outer rotor housing 4 of the motor on the inner wall of the rotor magnetic ring 3, then install the stator core 2 on the outer wall of the spindle foot 6, and install the permanent magnet 9, copper ring 8 and iron core 10 on the inner wall of the spindle foot 6 to form a magnetic damping mechanism 5. The outer rotor housing 4 of the motor and the spindle rod 1 are originally combined as one. Finally, insert the spindle rod 1 into the spindle foot 6 and use the hole reserved in the center of the bottom of the spindle foot 6 for positioning.

[0037] As another structure of the spindle rod support in this embodiment, Figure 5 As shown, the spindle rod support includes a spindle foot 6 and an ingot core 7 arranged inside the spindle foot 6, the ingot core 7 is columnar, the magnetic damping mechanism 5 is fixedly mounted on the inner wall of the ingot core 7, and the stator core 2 is mounted on the outer wall of the ingot core 7. The strength of the spindle rod support composed of the spindle foot 6 and the ingot core 7 is relatively large.

[0038] In this embodiment, as a specific structure of the positioning structure, such as Figure 4 As shown, the positioning structure is a positioning hole arranged at the bottom of the spindle rod 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. The positioning hole is directly arranged at the bottom of the spindle rod support, which is simple and reliable. A partial structure at the lower end of the spindle rod 1 is inserted into the positioning hole, which can prevent the spindle rod 1 from shaking significantly. The second gap A allows the spindle rod 1 to float slightly without generating friction with the positioning hole, thereby reducing noise.

[0039] In this embodiment, as another specific structure of the positioning structure, such as Figure 7 As shown, the positioning structure is a positioning ring 11 arranged on the spindle rod support, and a second gap A is left between the lower end of the spindle rod 1 and the inner wall of the positioning ring 11. The positioning ring 11 can be installed independently and replaced according to different spindle rods 1. The second gap A also allows the spindle rod 1 to float slightly without generating friction with the positioning ring 11, thereby reducing noise.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A method for realizing a low-noise spinning machine spindle, the structure of which comprises: A spindle rod (1), wherein the spindle rod (1) is inserted into a socket (12) in the middle of a spindle rod support along its axial direction, and a first gap is left between the spindle rod (1) and the socket (12), and is characterized in that a magnetic damping mechanism (5) is installed on the inner wall of the socket (12), and the magnetic damping mechanism (5) generates a radial magnetic attraction force on the spindle rod (1), and a positioning structure matching the spindle rod (1) is provided at the bottom of the spindle rod support, and the center lines of the spindle rod (1), the magnetic damping mechanism (5) and the positioning structure are coaxially arranged.

2. The method for realizing low-noise spinning machine spindle according to claim 1, characterized in that: The magnetic damping mechanism (5) comprises 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).

3. The method for realizing low-noise spinning machine electric spindle according to claim 2 is characterized in that: The permanent magnets (9) are arranged around the inner circumference of the copper ring (8).

4. The method for realizing low-noise spinning machine electric spindle according to claim 2 is characterized in that: The N pole and S pole of the permanent magnet (9) are arranged along the axial direction of the copper ring (8).

5. The method for realizing low-noise spinning machine electric spindle according to claim 1 is characterized in that: The magnetic damping mechanism (5) is installed axially directly below the bearing between the spindle rod (1) and the spindle rod support.

6. The method for realizing low-noise spinning machine spindle according to claim 1, characterized in that: A stator core (2) is installed on the outer side of the upper part of the spindle rod support, and a motor outer rotor housing (4) linked to the spindle rod (1) is arranged on the outer side of the stator core (2), and a rotor magnetic ring (3) is installed on the inner side wall of the motor outer rotor housing (4) at a position corresponding to the stator core (2).

7. The method for realizing low-noise spinning machine electric spindle according to claim 6 is characterized in that: The spindle rod support is an ingot foot (6), the magnetic damping mechanism (5) is fixedly mounted on the inner wall of the ingot foot (6), and the stator core (2) is mounted on the outer wall of the ingot foot (6).

8. The method for realizing low-noise spinning machine electric spindle according to claim 6, characterized in that: The spindle rod support comprises a spindle foot (6) and a spindle bladder (7) arranged inside the spindle foot (6); the spindle bladder (7) is columnar, the magnetic damping mechanism (5) is fixedly mounted on the inner wall of the spindle bladder (7), and the stator core (2) is mounted on the outer wall of the spindle bladder (7).

9. The method for realizing low-noise spinning machine electric spindle according to claim 1, characterized in that: The positioning structure is a positioning hole arranged at the bottom of the spindle rod 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.

10. The method for realizing low-noise spinning machine electric spindle according to claim 1, characterized in that: The positioning structure is a positioning ring (11) arranged on the spindle rod 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).

Images