ROTOR CUP FOR SPINNING

Abstract

 Disclosed is a rotor cup for spinning, including an integrally formed cup body and a cup shaft, where the cup body is an open cup area for fiber entry and yarn formation, and the cup shaft is configured for connecting with a driving shaft of the rotor cup for spinning. The rotor cup for spinning adopts a simple integrated structure, which requires no assembly, thus avoiding damage to drive bearings of the rotor cup for spinning caused by vibration and imbalance of the rotor cup for spinning overall, such as a magnetic suspension motor, an air bearing motor, a ball bearing motor, and the like. Further, the integrated molding process improves the accuracy of the rotor cup for spinning, and reduces the imbalance of the rotor cup for spinning, thus improving the pass-yield rate thereof.

Description

Technical Field

[0001] The present invention relates to the technical field of textile machinery, and particularly relates to a rotor cup for spinning.

Technical Background

[0002] Rotor spinning, also known as open-end spinning, is one of the methods for free-end spinning. Rotor spinning is a textile method through which processes of fiber conveying, condensing, combining and twisting to form yarn can be completed through a rotor cup rotating at high speed and airflow in the rotor cup. A rotor spinning machine usually uses a magnetic suspension motor, an air bearing motor, a ball bearing motor, and the like to drive a rotor cup for spinning. In order to ensure the normal operation of the magnetic suspension motor and avoid damage thereto, a load borne by a magnetic bearing should be reduced as much as possible, and the assembly accuracy should be improved.

[0003] Take a rotor cup in the prior art for example. In a Chinese patent with the publication No. EP 1966421 B2, a rotor cup and a rotor shaft are separated from each other, and the rotor shaft needs to be assembled into a shaft hole. However, due to the tolerances and assembly of a plurality of parts, vibration and imbalance of the rotor cup are too serious after the assembly, thus leading to many problems such as a low pass yield rate of rotor cups used for magnetic suspension motors, a high product scrap rate, and potential severe damage to the magnetic suspension motors.

Summary of the Invention

[0004] In order to solve the technical problems and overcome the defects in the prior art, the present invention provides a rotor cup for spinning. The rotor cup for spinning is an integrated one-piece rotor cup processed by a high-precision machine tool.

[0005] The technical solution adopted by the present invention to solve the technical problems is as follows: a rotor cup for spinning, including an integrally formed cup body and a cup shaft, where the cup body is an open cup area for fiber entry and yarn formation, and the cup shaft is configured for connecting with a driving shaft of the rotor cup for spinning, such as a driving shaft configured for a magnetic suspension motor, an air bearing motor, a ball bearing motor, and the like. Preferably, the rotor cup for spinning is an integrated one-piece rotor cup processed by a high-precision machine tool, thus avoiding too serious vibration and imbalance of the rotor cup caused by assembly of a plurality of parts.

[0006] Further, in order to ensure the connection with the driving shaft of the rotor cup for spinning, such as a driving shaft configured for the magnetic suspension motor, the air bearing motor, the ball bearing motor, and the like, precise positioning and limiting are required during assembly to prevent idling slippage. To this end, at least a certain area of the cup shaft is provided with a profile limiting part. The profile limiting part may include various surface profiles, preferably including a hexagonal profile.

[0007] Further, a diameter of the cup shaft ranges from 3 mm to 10 mm, and preferably, the diameter of the cup shaft can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm. The diameter range of the cup shaft can be selected with reference to straightness rigidity and required hardness.

[0008] Further, to improve yarn quality and the service life of the rotor cup for spinning, a surface of the rotor cup for spinning is provided with a functional and/or protective coating. The functional coating is capable of achieving a specific friction coefficient of the surface to improve yarn quality and increasing abrasive resistance of the surface to ensure the service life of the rotor cup for spinning. The protective coating protects the rotor cup for spinning from corrosion, thus ensuring the service life of the rotor cup for spinning.

[0009] Further preferably, the functional and/or protective coating is a nickel dispersion coating, and diamond particles are embedded into the nickel dispersion coating.

[0010] Further, a thickness of the functional and/or protective coating is 10-70 µm.

[0011] Due to a very short service life in specific application conditions when the functional and/or protective coating is relatively thin, the thickness of the functional and/or protective coating is further preferably 30-60 µm to prolong the service life.

[0012] Further, in order to have a smooth surface (improve yarn quality) and prevent surface abrasion, the surface of the rotor cup for spinning is further provided with a pure nickel coating. The pure nickel coating is directly applied to a base material surface of the rotor cup for spinning or on a surface of the functional and/or protective coating. Preferably, the thickness of the pure nickel coating is 2-10 µm.

[0013] Further, a steel material in a workshop environment with very high humidity and temperature is very prone to corrosion without protection by a coating, and therefore, at least an area of the cup shaft of the rotor cup for spinning is covered by the pure nickel coating. Preferably, the entire rotor cup for spinning may be provided with the pure nickel coating. Preferably, the rotor cup for spinning is made of a steel material.

[0014] The base material surface of the rotor cup for spinning can be hardened by use of the boronizing technology. After the hardening, a hardened base material surface with a hardness of greater than 1,300 HV can be found in an "open cup area" of the cup body.

[0015] Specifically, the cup body includes a first conical part forming a wall portion of the cup body and a second conical part forming a bottom portion of the cup body, where a yarn condensing tank is arranged on an inner wall at an intersection between the first conical part and the second conical part.

[0016] The present invention has the following beneficial effects:

(1) The rotor cup for spinning adopts a simple integrated structure, which requires no assembly, thus avoiding damage to the magnetic suspension motor caused by vibration and imbalance of the rotor cup for spinning overall, and improving the pass-yield rate of the rotor cups for spinning.

(2) The functional and/or protective coating improves yarn quality and the service life of the rotor cup for spinning.

(3) The thickness and contour shape of the cup shaft ensure sufficient rigidity/hardness while minimizing a weight thereof.

(4) The pure nickel coating makes the rotor cup for spinning have a smooth surface and prevents abrasion.

Brief Explanation of the Figures

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

FIG. 1

is a schematic diagram of a three-dimensional structure of a rotor cup for spinning in the present invention.

FIG. 2

is a schematic diagram of a sectional structure of a rotor cup for spinning in the present invention.

[0018] In the figures: 1, cup body; 1.1, first conical part; 1.2, second conical part; 1.3, yarn condensing tank; 2, cup shaft; and 2.1, profile limiting part.

Best Mode for Carrying Out the Invention

[0019] The present invention is further described in detail below with reference to the accompanying drawings. These accompanying drawings are all simplified schematic diagrams, which only illustrate a basic structure of the present invention in a schematic mode, so they only show structures related to the present invention. Directions and references (such as up, down, left, right, and so on) can be used to only help to describe features shown in the accompanying drawings. Therefore, the following specific implementation is not adopted in a limiting sense, and the scope of the technical content of the present invention must be limited by the appended claims and their equivalent forms only.

[0020] As shown in FIGs.1 and 2, the present invention provides a rotor cup for spinning. The rotor cup for spinning, made of steel or any other available material, includes an integrally formed cup body 1 and a cup shaft 2. Specifically, the rotor cup for spinning is an integrated one-piece rotor cup processed by a high-precision machine tool. The cup body 1 is an open cup area for fiber entry and yarn formation, including a first conical part 1.1 forming a wall portion of the cup body 1 and a second conical part 1.2 forming a bottom portion of the cup body 1, where a yarn condensing tank 1.3 is arranged on an inner wall at an intersection between the first conical part 1.1 and the second conical part 1.2. The cup shaft 2 is configured for connecting with a magnetic suspension motor. The cup shaft 2 is integrally cylindrical. A diameter of the cup shaft 2 ranges from 3 mm to 10 mm, and the diameter thereof is recommended to be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm. At least a certain area of the cup shaft 2 is provided with a profile limiting part 2.1. The profile limiting part 2.1 may include various surface profiles, preferably including a hexagonal profile. An inner cavity of the second conical part 1.2 is conical and forms a conical bottom portion of the cup body 1.

[0021] A surface of the rotor cup for spinning is provided with a functional and/or protective coating. The functional and/or protective coating is a nickel dispersion coating, and diamond particles are embedded into the nickel dispersion coating. A thickness of the nickel dispersion coating is 10-70 µm, further preferably 30-60 µm.

[0022] The surface of the rotor cup for spinning is further provided with a pure nickel coating. The pure nickel coating is directly applied to a base material surface of the rotor cup for spinning or on a surface of the functional and/or protective coating. Preferably, the thickness of the pure nickel coating is 2-10 µm. The pure nickel coating can be applied to all or part of the rotor cup for spinning, and at least an area of the cup shaft 2 of the rotor cup for spinning is covered by the pure nickel coating. The base material surface of the rotor cup for spinning can be hardened by use of the boronizing technology. After the hardening, a hardened base material surface with a hardness of greater than 1,300 HV can be found in a "cup opening area" of the cup body.

[0023] Inspired by the above ideal embodiments according to the present invention, through the above description, relevant workers can make various changes and modifications within the scope without deviating from the present invention. The technical scope of the present invention is not limited to the contents in the description, but must be determined according to the scope of claims.

Claims

1. A rotor cup for spinning, characterized in that, comprising an integrally formed cup body and a cup shaft, wherein the cup body is an open cup area for fiber entry and yarn formation, and the cup shaft is configured for connecting with a driving shaft of the rotor cup for spinning.

2. The rotor cup for spinning according to claim 1, characterized in that, at least a certain area of the cup shaft is provided with a profile limiting part.

3. The rotor cup for spinning according to claim 1, characterized in that, a diameter of the cup shaft ranges from 3 mm to 10 mm.

4. The rotor cup for spinning according to claim 1, characterized in that, a surface of the rotor cup for spinning is provided with a functional and/or protective coating.

5. The rotor cup for spinning according to claim 4, characterized in that, the functional and/or protective coating is a nickel dispersion coating, and diamond particles are embedded into the nickel dispersion coating.

6. The rotor cup for spinning according to claim 4 or 5, characterized in that, a thickness of the functional and/or protective coating is 10-70 µm.

7. The rotor cup for spinning according to claim 6, characterized in that, a thickness of the functional and/or protective coating is 30-60 µm.

8. The rotor cup for spinning according to claim 1, characterized in that, the surface of the rotor cup for spinning is further provided with a pure nickel coating, the pure nickel coating is directly applied to a base material surface of the rotor cup for spinning or on a surface of the functional and/or protective coating, and the thickness of the pure nickel coating is 2-10 µm.

9. The rotor cup for spinning according to claim 8, characterized in that, at least an area of the cup shaft of the rotor cup for spinning is covered by the pure nickel coating.

10. The rotor cup for spinning according to claim 1, characterized in that, the cup body comprises a first conical part forming a wall portion of the cup body and a second conical part forming a bottom portion of the cup body, wherein a yarn condensing tank is arranged on an inner wall at an intersection between the first conical part and the second conical part.

Drawing