A spinning rotor spinning channel and its adjusting device

Abstract

The invention relates to a kind of rotor spinning fiber conveying channel and its adjusting device, the rotor spinning fiber conveying channel is composed of fixed section and movable section, the fixed section is composed of connected tapered section I and cylindrical section I, the movable section is composed of sequentially connected cylindrical section II, tapered section II and cylindrical section III, cylindrical section II is movably sleeved on the outer surface of cylindrical section I; the adjusting device of the above-mentioned rotor spinning fiber conveying channel is composed of false twist disc, gear I, gear II, screw rod, movable block, support rod, connecting rod and shell; false twist disc is connected with screw rod through gear I and gear II, movable block has thread inside, thread is connected with screw rod, connecting rod is fixedly installed on the lower end of movable block, and connecting rod is connected with cylindrical section II.The invention makes the fiber conveying channel adjustable, adjusts the distance between fiber outlet and fiber sliding surface by rotating false twist disc, achieves the purpose of spinning different hardness yarn without replacing fiber conveying channel and rotor, and expands the application range of rotor spinning.

Description

Technical Field

[0001] This invention belongs to the field of spinning equipment technology, and relates to a rotor spinning fiber conveying channel and its adjustment device, particularly a retractable rotor spinning fiber conveying channel and its adjustment device. Background Technology

[0002] Rotor spinning is currently the most mature spinning method besides ring spinning, offering advantages such as high spinning speed, short process flow, high level of automation, and good yarn finish. The structure of rotor yarn differs from that of ring-spun yarn; rotor yarn consists of core fibers and outer wrapping fibers. Due to the presence of the outer wrapping fibers and insufficient straightening and parallelism of the core fibers, rotor yarn has a stiffer hand feel compared to ring-spun yarn of the same twist coefficient, which limits its application to some extent.

[0003] The fiber delivery channel is one of the important components of a rotor spinning machine. Its first function is to transport the single fibers separated by the carding rollers into the rotor. Secondly, it uses airflow acceleration to better straighten the fibers; therefore, the fiber delivery channel is typically a tapering funnel shape. Current research shows that the distance between the fiber outlet and the rotor sliding surface, as well as the distance between the fiber delivery channel and the fiber condensation groove, affects the degree of parallel alignment of the fibers in the yarn, thus influencing the yarn's stiffness and hand feel. The principle is as follows: During rotor yarn forming, fibers are fed into the fiber feeding channel from the fiber outlet under the action of airflow. They must first pass through the fiber sliding surface (or the inner wall of the rotor) before reaching the fiber condensation groove. Because the surface linear velocity of the fiber sliding surface is much higher than the airflow velocity in the fiber feeding channel, there is a certain velocity difference between the fiber sliding surface and the fiber. When the fiber encounters the fiber sliding surface, it is stretched and straightened longitudinally, allowing the fiber to align parallel within the rotor condensation groove. Simultaneously, due to the spiral negative pressure airflow within the rotor acting on the fiber's path from the fiber outlet to the fiber sliding surface, some fibers are wrapped around the outer surface of the yarn during the yarn forming process, forming wrapped fibers. Therefore, rotor yarn exhibits a layered structure with a core layer and an outer wrapping layer. The distance between the fiber outlet and the fiber sliding surface, the rotor speed, and the condition and magnitude of the negative pressure airflow within the rotor directly affect the degree of parallel alignment of the fibers in the core layer and the number of wrapped fibers, thus influencing its hardness, hand feel, and other performance properties.

[0004] The stiffness and hand feel of yarn directly affect its application. For example, knitting yarn requires softness and low stiffness. Therefore, to reduce the stiffness of knitting yarn, the common method is to reduce its twist coefficient. However, reducing the twist coefficient also reduces the yarn's strength, elongation, and other physical properties. Because rotor-spun yarn has a stiffer hand feel compared to ring-spun yarn with the same twist coefficient, it is generally not used in the knitting field. Improving the stiffness of rotor-spun yarn by reducing its twist coefficient will reduce the yarn's strength, making it prone to breakage during spinning and weaving. This not only affects production efficiency but also the quality of the yarn.

[0005] Therefore, it is of great significance to improve the rotor to expand the application range of rotor spinning and improve the quality of yarn so that it can be well applied in the field of knitting yarn. Summary of the Invention

[0006] The purpose of this invention is to solve the aforementioned problems in the prior art and to provide a rotor spinning fiber delivery channel and its adjustment device. Since the distance between the fiber outlet and the fiber sliding surface affects the yarn's hardness, hand feel, and other performance indicators, this invention makes the fiber delivery channel adjustable. By rotating the false twist disc, the distance between the fiber outlet and the fiber sliding surface can be adjusted, achieving the goal of spinning yarns of different hardness without changing the fiber delivery channel and rotor, thus expanding the applicability of rotor spinning.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A rotor spinning fiber conveying channel comprises a fixed section and a movable section. The fixed section consists of a connected tapered section I and a cylindrical section I. The movable section consists of a cylindrical section II, a tapered section II, and a cylindrical section III connected in sequence. The cylindrical section II is movably fitted onto the outer surface of the cylindrical section I, thereby allowing the cylindrical section II to slide along the cylindrical section I.

[0009] As a preferred technical solution:

[0010] In the rotor spinning fiber conveying channel described above, the inner diameter of the cylindrical section II is 0.05 to 0.1 mm larger than the outer diameter of the cylindrical section I.

[0011] In the rotor spinning fiber conveying channel described above, the length of the tapered section I is 2-3 mm, the length of the cylindrical section I is 4-6 mm, the length of the cylindrical section II is 4-6 mm, the length of the tapered section II is 2-3 mm, and the length of the cylindrical section III is 5-6 mm.

[0012] In the rotor spinning fiber conveying channel described above, the inner diameter of the cylindrical section I is 3-5 mm, and the outer diameter of the cylindrical section I is 3.5-5.5 mm.

[0013] In the rotor spinning fiber conveying channel described above, the inner diameter of the cylindrical section II is 3.55–5.55 mm, and the outer diameter of the cylindrical section II is 3.6–5.6 mm.

[0014] In the rotor spinning fiber conveying channel described above, the inner diameter of the cylindrical section III is 2-3 mm, and the outer diameter of the cylindrical section III is 2.05-3.05 mm.

[0015] In the rotor spinning fiber conveying channel described above, the inner diameter of the small end of the tapered section I is equal to the inner diameter of the cylindrical section I, and the outer diameter of the small end of the tapered section I is equal to the outer diameter of the cylindrical section I.

[0016] The inner diameter of the large end of the tapered section II is equal to the inner diameter of the cylindrical section II, and the outer diameter of the large end of the tapered section II is equal to the outer diameter of the cylindrical section II.

[0017] The inner diameter of the small end of the tapered section II is equal to the inner diameter of the cylindrical section III, and the outer diameter of the small end of the tapered section II is equal to the outer diameter of the cylindrical section III.

[0018] In the rotor spinning fiber conveying channel described above, the inlet of the tapered section I is elliptical, with the major axis of the ellipse having a length of 6-8 mm and the minor axis having a length of 3-5 mm.

[0019] The present invention also provides an adjustment device for the rotor spinning fiber conveying channel as described above, comprising a housing and a false twist disc, gear I, gear II, lead screw, movable block, support rod and connecting rod located in the housing;

[0020] The false twist disc is fixedly connected to the gear I, the gear I and the gear II mesh with each other, the gear II is fixedly connected to the lead screw by a key, the movable block is movably sleeved on the support rod and connected to the housing through the support rod, the movable block has internal threads, the threads are connected to the lead screw, the lower end of the movable block is fixedly installed with the connecting rod, and the connecting rod is connected to the cylindrical section II.

[0021] As a preferred technical solution:

[0022] As described above, in the adjusting device for the fiber feeding channel of a rotor spinning machine, both gear I and gear II are bevel gears. Since the installation direction of the false twist disc and the installation direction of the lead screw are perpendicular to each other, the use of bevel gears can better convert the helical motion of the false twist disc into the helical operation of the lead screw.

[0023] The principle of this invention is as follows:

[0024] This invention divides the fiber conveying channel into a fixed section and a movable section. The fixed section is fixed in position and consists of two parts. The purpose of the tapered section I is to facilitate airflow acceleration, allowing the fiber to straighten and accelerate better within the fiber conveying channel. The cylindrical section II facilitates connection with the cylindrical section II of the movable section. The movable section is divided into three segments. The inner diameter of the cylindrical section II is slightly larger than the outer diameter of the cylindrical section I in the fixed section. The cylindrical section II can slide left and right along the cylindrical section I, allowing the position of the cylindrical section III inside the rotor to vary. The tapered section II allows the airflow to accelerate a second time after passing through the cylindrical sections I and II, further straightening the fiber. The cylindrical section III is the fiber outlet end of the fiber conveying channel. The position of the cylindrical section III inside the rotor affects the distance between the fiber outlet and the rotor's condensation groove and the fiber sliding surface, thus affecting the straightening state of the fiber after condensation and the straightening parallelism of the fiber in the yarn after twisting, thereby changing the structure of the spun yarn.

[0025] The adjustment mechanism of the rotor spinning fiber conveying channel of the present invention is as follows: when the false twist disc is rotated, gear I drives gear II, thereby causing the lead screw to rotate. When the lead screw rotates, the movable block slides along the lead screw, and through the connecting rod, the movable section of the fiber conveying channel moves left and right along the fixed section, thereby achieving the purpose of adjustment.

[0026] Beneficial effects

[0027] (1) The rotor spinning fiber conveying channel of the present invention consists of a fixed section and a movable section. The movable section can slide along the fixed section, thereby changing the position of the fiber outlet of the fiber conveying channel. Thus, without changing the rotor diameter, the distance between the fiber outlet of the fiber conveying channel and the fiber sliding surface and fiber coagulation groove of the rotor can be freely adjusted, thereby affecting the quality of the yarn.

[0028] (2) The adjusting device of the rotor spinning fiber conveying channel of the present invention can flexibly adjust the position of the fiber outlet of the fiber conveying channel by rotating the false twisting disc left and right. It has a simple structure, is convenient and flexible, and is highly practical. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the rotor spinning fiber conveying channel and its adjustment device according to the present invention;

[0030] Figure 2 This is a schematic diagram of the rotor spinning fiber conveying channel adjustment device of the present invention;

[0031] In the figure, 1-converging section I, 2-cylindrical section I, 3-cylindrical section II, 4-converging section II, 5-cylindrical section III, 6-false twist disc, 7-gear I, 8-gear II, 9-lead screw, 10-moving block, 11-support rod, 12-connecting rod, 13-shell. Detailed Implementation

[0032] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0033] A rotor spinning fiber transport channel, such as Figure 1 As shown, it consists of a fixed section and a movable section. The fixed section is composed of a connected tapered section I1 and a cylindrical section I2, with tapered section I1 having a length of 2-3 mm and cylindrical section I2 having a length of 4-6 mm. The movable section is composed of a sequentially connected cylindrical section II3, tapered section II4, and cylindrical section III5, with cylindrical section II3 having a length of 4-6 mm, tapered section II4 having a length of 2-3 mm, and cylindrical section III5 having a length of 5-6 mm. The entrance of tapered section I1 is elliptical, with a major axis length of 6-8 mm and a minor axis length of 3-5 mm. The inner diameter of cylindrical section I2 is 3-5 mm, and the outer diameter is 3.5-5.5 mm. The inner diameter of the small end of tapered section I1 is the same as that of cylindrical section I2. The inner diameters are equal, and the outer diameter of the small end of the tapered section I1 is equal to the outer diameter of the cylindrical section I2; the inner diameter of the cylindrical section II3 is 3.55-5.55 mm, which is 0.05-0.1 mm larger than the outer diameter of the cylindrical section I2, and the cylindrical section II3 is movably fitted onto the outer surface of the cylindrical section I2; the outer diameter of the cylindrical section II3 is 3.6-5.6 mm; the inner diameter of the cylindrical section III5 is 2-3 mm, and the outer diameter is 2.05-3.05 mm; the inner diameter of the large end of the tapered section II4 is equal to the inner diameter of the cylindrical section II3, the outer diameter of the large end of the tapered section II4 is equal to the outer diameter of the cylindrical section II3, the inner diameter of the small end of the tapered section II4 is equal to the inner diameter of the cylindrical section III5, and the outer diameter of the small end of the tapered section II4 is equal to the outer diameter of the cylindrical section III5.

[0034] The aforementioned adjusting device for the rotor spinning fiber transport channel, such as Figure 2 As shown in the figure (this figure is for illustrative purposes only, and the housing is omitted in the figure), it includes a housing 13 and a false twist disc 6, gear I 7, gear II 8, lead screw 9, movable block 10, support rod 11, and connecting rod 12 located in the housing 13. The fiber conveying channel, composed of a fixed section and a movable section, is also installed in the housing 13 and passes through the housing 13. Gear I 7 and gear II 8 are both bevel gears. Gear I 7 and gear II 8 mesh with each other. The false twist disc 6 is fixedly connected to gear I 7. Gear II 8 is fixedly connected to lead screw 9 by a pin. The movable block 10 has internal threads, which are connected to lead screw 9. The lower end of the movable block 10 is fixedly installed with connecting rod 12, which is connected to cylindrical section II 3. The movable block 10 is movably sleeved on the support rod 11 and connected to the housing 13 through the support rod 11.

[0035] The mechanism of adjusting the fiber feeding channel of the rotor spinning machine using the above-mentioned adjustment device is as follows: when the false twist disc 6 is rotated, gear I7 drives gear II8, thereby causing the lead screw 9 to rotate. When the lead screw 9 rotates, the movable block 10 slides along the lead screw 9, and through the connecting rod 12, the movable section of the fiber feeding channel moves left and right along the fixed section, thereby achieving the purpose of adjustment.

[0036] Spinning is performed using a spinning machine equipped with the aforementioned rotor spinning fiber conveying channel and its adjustment device. The housing 13 is installed between the combing roller and the rotor of the rotor spinning machine, isolating the combing roller and the rotor. The length of the tapered section I1 is 2 mm, the length of the cylindrical section I2 is 6 mm, the length of the cylindrical section II3 is 5 mm, the length of the tapered section II4 is 3 mm, and the length of the cylindrical section III5 is 6 mm. The major axis of the ellipse is 7 mm, and the minor axis is 4 mm. The inner diameter of the cylindrical section I2 is 4 mm, and the outer diameter is 4.5 mm. The inner diameter of the cylindrical section II3 is 0.05 mm larger than the outer diameter of the cylindrical section I2, and the outer diameter of the cylindrical section II3 is 4.7 mm. The inner diameter of the cylindrical section III5 is 2 mm, and the outer diameter is 2.15 mm.

[0037] The device is used for spinning. The raw material is cotton fiber with a main body length of 28 mm and a sliver weight of 20 g / 5 m. The rotor speed is 80,000 r / min, the rotor diameter is 32 mm, the yarn count is 32 English count, and the designed twist is 630 twists / m. During spinning, when the false twist disc 6 is rotated, gear I 7 drives gear II 8, thereby rotating the lead screw 9. When the lead screw 9 rotates, the movable block 10 slides along the lead screw 9, and through the connecting rod 12, the movable section of the fiber conveying channel moves along the fixed section, which changes the minimum distance 'a' of the line connecting the center point of the fiber outlet to the fiber sliding surface in a direction parallel to the bottom of the cup, and the minimum distance 'b' between the center point of the fiber outlet and the center point of the fiber coagulation groove.

[0038] The position of the fiber exit point affects the yarn's softness (or hardness) and other performance indicators. While there's no standard quantitative measurement method for yarn softness, it can be reflected by indicators such as breaking strength and elongation at break. With all other spinning parameters identical, rotating the false twist disc 6 causes gear I 7 to drive gear II 8, thus rotating the lead screw 9. As the lead screw 9 rotates, the movable block 10 slides along it, and the connecting rod 12 causes the movable section of the fiber feeding channel to move 2mm to the right along the fixed section. This results in a minimum distance a of 4mm between the center point of the fiber exit point and the fiber sliding surface along a direction parallel to the bottom of the cup, and a minimum distance b of 20.5mm between the center point of the fiber exit point and the center point of the fiber cohesion groove. The resulting rotor-type cotton yarn has a breaking strength of 7.5cN / tex and an elongation at break of 23%. Compared to the initial position, the yarn's breaking strength and elongation at break are significantly improved. The decrease in elongation indirectly indicates that, with the yarn twist remaining constant, moving the movable section of the fiber conveying channel to the right reduces the distance between the fiber outlet and the fiber sliding surface and the fiber cohesion groove. This results in a less tight bond between the fibers in the yarn, making the yarn softer and more suitable for knitting. Conversely, when the movable section of the fiber conveying channel moves 2mm to the left along the fixed section, the minimum distance 'a' of the line connecting the center point of the fiber outlet to the fiber sliding surface along a direction parallel to the bottom of the cup is 8mm, and the minimum distance 'b' between the center point of the fiber outlet and the center point of the fiber cohesion groove is 25mm. The resulting rotor cotton yarn has a breaking strength of 11.5cN / tex and a breaking elongation of 25.5%. The increase in yarn strength and elongation reflects a greater tightness in the fiber bond within the yarn, making the yarn stiffer and less suitable for knitting.

[0039]

Claims

1. A rotor spinning fiber transport channel, characterized in that: It consists of a fixed section and a movable section. The fixed section consists of a connected tapered section I (1) and a cylindrical section I (2). The movable section consists of a cylindrical section II (3), a tapered section II (4) and a cylindrical section III (5) connected in sequence. The cylindrical section II (3) is movably fitted onto the outer surface of the cylindrical section I (2). The inner diameter of the small end of the tapered section I (1) is equal to the inner diameter of the cylindrical section I (2), and the outer diameter of the small end of the tapered section I (1) is equal to the outer diameter of the cylindrical section I (2). The inner diameter of the large end of the tapered section II (4) is equal to the inner diameter of the cylindrical section II (3), and the outer diameter of the large end of the tapered section II (4) is equal to the outer diameter of the cylindrical section II (3). The inner diameter of the small end of the tapered section II (4) is equal to the inner diameter of the cylindrical section III (5), and the outer diameter of the small end of the tapered section II (4) is equal to the outer diameter of the cylindrical section III (5).

2. The rotor spinning fiber conveying channel according to claim 1, characterized in that, The inner diameter of the cylindrical segment II (3) is 0.05~0.1mm larger than the outer diameter of the cylindrical segment I (2).

3. The rotor spinning fiber conveying channel according to claim 2, characterized in that, The length of the tapered section I (1) is 2~3mm, the length of the cylindrical section I (2) is 4~6mm, the length of the cylindrical section II (3) is 4~6mm, the length of the tapered section II (4) is 2~3mm, and the length of the cylindrical section III (5) is 5~6mm.

4. The rotor spinning fiber conveying channel according to claim 3, characterized in that, The inner diameter of the cylindrical segment I (2) is 3~5mm, and the outer diameter of the cylindrical segment I (2) is 3.5~5.5mm.

5. A rotor spinning fiber conveying channel according to claim 4, characterized in that, The inner diameter of the cylindrical segment II (3) is 3.55~5.55mm, and the outer diameter of the cylindrical segment II (3) is 3.6~5.6mm.

6. A rotor spinning fiber conveying channel according to claim 5, characterized in that, The inner diameter of the cylindrical segment III (5) is 2~3mm, and the outer diameter of the cylindrical segment III (5) is 2.05~3.05mm.

7. A rotor spinning fiber conveying channel according to claim 6, characterized in that, The entrance of the tapering section I (1) is elliptical, with the major axis of the ellipse being 6-8 mm and the minor axis being 3-5 mm.

8. The adjusting device for the rotor spinning fiber conveying channel as described in any one of claims 1 to 7, characterized in that: Includes housing (13) and false twist disc (6), gear I (7), gear II (8), lead screw (9), movable block (10), support rod (11) and connecting rod (12) located in housing (13); The false twist disc (6) is fixedly connected to the gear I (7), the gear I (7) and the gear II (8) mesh with each other, the gear II (8) is fixedly connected to the lead screw (9), the movable block (10) is movably sleeved on the support rod (11), and is connected to the housing (13) through the support rod (11). The movable block (10) has a thread inside, and the thread is connected to the lead screw (9). The connecting rod (12) is fixedly installed at the lower end of the movable block (10), and the connecting rod (12) is connected to the cylindrical section II (3).

9. The adjusting device for the rotor spinning fiber conveying channel according to claim 8, characterized in that, Gear I (7) and gear II (8) are both bevel gears.

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