CN108866659B - Yarn processing device and roller cover - Google Patents
Yarn processing device and roller cover Download PDFInfo
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- CN108866659B CN108866659B CN201810424644.1A CN201810424644A CN108866659B CN 108866659 B CN108866659 B CN 108866659B CN 201810424644 A CN201810424644 A CN 201810424644A CN 108866659 B CN108866659 B CN 108866659B
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- yarn
- roller
- feeding roller
- guide roller
- yarn feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H51/00—Forwarding filamentary material
- B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
- B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D11/00—Other features of manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
Abstract
The invention provides a yarn processing device and a roller cover which effectively reduce power consumption when a yarn is conveyed by a yarn conveying roller. A guide roller (18) for conveying the yarn (Y) is covered with a roller cover (40). The roller cover (40) has a cylindrical 1 st portion (41) formed so as to surround the outer peripheral surface (18a) of the guide roller (18), and a circular 2 nd portion (42) arranged so as to face the distal end surface (18b) of the guide roller (18) and continuous with the distal end of the 1 st portion (41). The inner diameter (Dc) of the 1 st portion (41) is 1.6 times or more and 1.9 times or less the outer diameter (Dr) of the guide roller (18). The difference between the distance (Dc/2) from the outer peripheral surface (18a) of the guide roller (18) and the inner wall surface (41a) of the 1 st portion (41) to the shaft (J) of the guide roller (18) and the radius (Dr/2) of the guide roller (18) is constant within the range of 40mm to 55 mm.
Description
Technical Field
The present invention relates to a yarn processing apparatus and a roller cover (english).
Background
In the spinning and drawing apparatus described in patent document 1, the yarn Y spun from the spinning apparatus is drawn by a plurality of godet rollers, and the drawn yarn is conveyed to a winding unit by a guide roller. Then, the drawn yarn is wound around a bobbin in a winding unit to form a package.
[ patent document 1 ] Japanese patent laid-open No. 2016-164314
Among them, in patent document 1, when the yarn is conveyed by the guide roller, the rotating guide roller agitates the surrounding air. At this time, if the energy (hereinafter, sometimes referred to as "power consumption") consumed by the guide roller to agitate the surrounding air is large, the power consumption of the motor that rotationally drives the guide roller becomes large.
Disclosure of Invention
The invention aims to provide a yarn processing device and a roller cover which can effectively reduce power consumption when a yarn is conveyed by a yarn conveying roller.
A yarn processing device according to claim 1 of the present invention includes a yarn feeding roller for feeding a yarn, and a roller cover for covering the yarn feeding roller; the roller cover has: a 1 st portion which surrounds an outer peripheral surface of the yarn feeding roller, and in which a yarn introducing port for introducing the yarn from the outside into a space in which the yarn feeding roller is disposed, a yarn introducing port for introducing the yarn from the outside into the space, and a yarn introducing port for introducing the yarn from the space to the outside are formed, and a 2 nd portion which is opposed to a distal end surface of the yarn feeding roller in an axial direction of the yarn feeding roller and is continuous to the 1 st portion; the distance of the inner wall surface of the 1 st portion from the central axis of the yarn feeding roller is within a range of 1.6 times or more and 1.9 times or less of the radius of the yarn feeding roller.
According to the present invention, by providing the roller cover covering the yarn feeding roller, the amount of air around the roller in the yarn feeding path can be reduced, and power consumption can be reduced. In this case, if only the amount of air around the yarn conveying roller is considered to be reduced, it is considered to be preferable to reduce the distance between the outer peripheral surface of the yarn conveying roller and the inner wall surface of the 1 st portion as much as possible and to reduce the volume of the gap between the outer peripheral surface of the yarn conveying roller and the inner wall surface of the 1 st portion as much as possible.
However, when the yarn is introduced into the space inside the roll cover through the yarn introducing port, air outside the roll cover flows into the space inside the roll cover through the yarn introducing port due to an air flow (wake flow) generated around the advancing yarn. When the yarn is guided out of the roll mantle through the yarn guide-out port, air in the space inside the roll mantle flows out of the roll mantle through the yarn guide-out port due to an air flow (wake) generated around the running yarn. At this time, if the volume of the gap between the outer peripheral surface of the yarn feeding roller and the inner wall surface of the roller cover is too small, the flow of air flowing into the space in the roller cover and the flow of air flowing out of the space in the roller cover have a large influence on the flow of air in the gap, and the air flow is likely to be disturbed in the gap. As a result, power consumption may become large.
Therefore, in the present invention, the distance of the inner wall surface of the 1 st portion of the roller cover from the center of the yarn feeding roller is set to be in the range of 1.6 times to 1.9 times the radius of the yarn feeding roller. If the roll mantle is made to have such a size, the power consumption can be effectively reduced.
A yarn processing device according to claim 2 of the present invention includes a yarn feeding roller for feeding a yarn, and a roller cover for covering the yarn feeding roller; the roller cover has: a 1 st portion which surrounds an outer peripheral surface of the yarn feeding roller, and in which a yarn introducing port for introducing the yarn from the outside into a space in which the yarn feeding roller is disposed, a yarn introducing port for introducing the yarn from the outside into the space, and a yarn introducing port for introducing the yarn from the space to the outside are formed, and a 2 nd portion which is opposed to a distal end surface of the yarn feeding roller in an axial direction of the yarn feeding roller and is continuous to the 1 st portion; the difference between the distance of the inner wall surface of the 1 st section from the central axis of the yarn feeding roller and the radius of the yarn feeding roller is within a range of 40mm to 55 mm.
According to the present invention, by providing the roller cover covering the yarn feeding roller, the amount of air around the roller in the yarn feeding path can be reduced, and power consumption can be reduced. At this time, if the distance between the outer peripheral surface of the yarn conveying roller and the inner wall surface of the 1 st portion is made too small as described above, the air flow may be easily disturbed in the gap between the outer peripheral surface of the yarn conveying roller and the inner wall surface of the 1 st portion, and power consumption may increase.
Therefore, the difference between the distance of the inner wall surface of the 1 st part from the central axis of the yarn feeding roller and the radius of the yarn feeding roller is within the range of 40mm to 55 mm. If the roll mantle is made to have such a size, the power consumption can be effectively reduced.
A yarn processing device according to claim 3 of the present invention is the yarn processing device according to claim 1 or 2, wherein an inner wall surface of the roller cover is circular with an axis of the yarn feeding roller as a center when viewed in an axial direction of the yarn feeding roller.
According to the present invention, if the inner wall surface of the 1 st portion of the roller cover is made circular about the axis of the yarn conveying roller when viewed in the axial direction of the yarn conveying roller, the distance between the outer peripheral surface of the yarn conveying roller and the inner wall surface of the 1 st portion of the roller cover is fixed, and the air flow in the gap is easily stabilized. This can reduce power consumption more effectively.
The yarn processing device according to claim 4 of the present invention is the yarn processing device according to any one of claims 1 to 3, wherein a running speed of an outer peripheral surface of the yarn feeding roller is in a range of 1000m/min to 6000 m/min.
According to the present invention, when the traveling speed of the outer peripheral surface of the yarn conveying roller is in the range of 1000m/min to 6000m/min, the power consumption can be effectively reduced by providing the yarn conveying roller with the roller cover having the above-described size.
A roller cover according to claim 5 of the present invention is a roller cover covering a yarn feeding roller for feeding a yarn, and includes a portion disposed so as to surround an outer peripheral surface of the yarn feeding roller, a 1 st portion in which a yarn introducing port for introducing the yarn from outside into a space in which the yarn feeding roller is disposed, a yarn introducing port for introducing the yarn from inside to outside, and a yarn introducing port for introducing the yarn from inside to outside are formed, and a 2 nd portion facing a tip end surface of the yarn feeding roller in an axial direction of the yarn feeding roller and connected to the 1 st portion; the distance of the inner wall surface of the 1 st portion from the central axis of the yarn feeding roller is within a range of 1.6 times or more and 1.9 times or less of the radius of the yarn feeding roller.
A roller cover according to claim 6 of the present invention is a roller cover covering a yarn feeding roller for feeding a yarn, and includes a portion disposed so as to surround an outer peripheral surface of the yarn feeding roller, a 1 st portion in which a yarn introducing port for introducing the yarn from outside into a space in which the yarn feeding roller is disposed, a yarn introducing port for introducing the yarn from inside to outside, and a yarn introducing port for introducing the yarn from inside to outside are formed, and a 2 nd portion facing a tip end surface of the yarn feeding roller in an axial direction of the yarn feeding roller and connected to the 1 st portion; the difference between the distance of the inner wall surface of the 1 st section from the central axis of the yarn feeding roller and the radius of the yarn feeding roller is within a range of 40mm to 55 mm.
The invention has the following effects: according to the present invention, the power consumption can be effectively reduced by setting the distance between the inner wall surface of the 1 st portion of the roller cover and the center of the yarn feeding roller to be in the range of 1.6 times or more and 1.9 times or less of the radius of the yarn feeding roller at any portion, or setting the difference between the distance between the inner wall surface of the 1 st portion of the roller cover and the center axis of the yarn feeding roller and the radius of the yarn feeding roller to be in the range of 40mm or more and 55mm or less.
Drawings
FIG. 1 is a schematic configuration diagram of a spinning collecting apparatus according to an embodiment of the present invention;
FIG. 2 is an axial cross-sectional view of the guide roll and roll mantle of FIG. 1;
FIG. 3 is a sectional view taken along line III-III of FIG. 2;
FIG. 4 is a view of an analysis model for calculating power consumption when the inner diameter of the roll mantle is larger than the outer diameter of the flange part of the guide roll, corresponding to FIG. 2;
FIG. 5 is a view of an analysis model for calculating power consumption when the inner diameter of the roll mantle is larger than the outer diameter of the flange of the guide roll, corresponding to FIG. 3
Fig. 6 is a diagram of an analysis model for calculating power consumption when the inner diameter of the roll mantle is equal to or less than the outer diameter of the flange portion of the guide roll, corresponding to fig. 2;
FIG. 7(a) is a table showing the analysis results of the relationship between the inner diameter and the power consumption of the roll mantle in examples 1 to 3 and comparative examples 1 to 6, and (b) is a graph obtained by patterning (a);
fig. 8(a) is a block diagram of an experimental apparatus for measuring power consumption of a motor for driving a guide roller, and (b) is a table showing experimental results of a relationship between presence or absence of a roller cover and power consumption.
In the figure, 1-a spin take-up device; 18-a guide roller; 18 a-peripheral surface; 18 b-top end face; 40-roll cover; 41-part 1; 41 a-inner wall surface; 42-part 2; 44-a thread introduction port; 45-wire outlet
Detailed Description
The following describes preferred embodiments of the present invention.
Spinning take-up device
As shown in fig. 1, the take-up device 1 includes a take-up and drawing device 3 and a yarn winding device 4. A spinning device 2 is disposed above the spinning/collecting device 1. A molten fiber material such as polyester continuously spun from a spinneret of the spinning device 2 is blown into the cooling cylinder 5 by cooling air and solidified to become a plurality of threads Y. The spinning and drawing device 3 is disposed below the cooling cylinder 5, and draws the plurality of yarns Y fed downward from the cooling cylinder 5. The yarn winding device 4 winds the plurality of yarns Y stretched by the spun yarn stretching device 3 around the bobbin 29 to form a winding package 9. In the following, the left-right direction in fig. 1 perpendicular to the up-down direction is defined as the "left-right direction", and the left and right sides in the left-right direction are defined as shown in fig. 1. A direction orthogonal to the paper surface of fig. 1, which is orthogonal to the vertical direction and the horizontal direction, is defined as a "front-rear direction", a near side in the direction orthogonal to the paper surface of fig. 1 is defined as a "front side", and a deep side is defined as a "rear side".
Spinning stretching device
The spinning and drawing apparatus 3 includes a finish guide 6 and a heating and drawing section 7. The finish guide 6 is a device for applying a finish to each of the plurality of yarns Y spun from the spinning device 2. The plurality of yarns Y to which the finish is applied by the finish guide 6 are conveyed to the heating and stretching unit 7 via the guide roller 17.
The heating and stretching section 7 includes an incubator 16 and 5 godet rollers 11a to 11e accommodated in the incubator 16. The heat insulating box 16 is a box body made of a heat insulating material. A yarn inlet 16a for introducing the plurality of yarns Y into the heat insulating box 16 and a yarn outlet 16b for discharging the plurality of yarns Y from the heat insulating box 16 to the outside are formed in a right side wall portion of the heat insulating box 16. The thread introducing port 16a is formed at a lower end portion of a side wall portion of the heat insulating case 16, and the thread discharging port 16b is formed at an upper end portion of a side wall portion of the heat insulating case 16.
The godet rollers 11a to 11e are rollers extending in the front-rear direction. Of the 5 godet rollers 11a to 11e, the godet roller 11a is disposed in the vicinity of the bottom of the heat-insulating box 16. Above the godet roller 11a, other 4 godet rollers 11b to 11e are arranged in a staggered manner in the left-right direction of the figure. The plurality of yarns Y introduced into the heat insulating box 16 from the yarn introducing port 16a are wound around 5 godet rollers 11a to 11e in order from the lower godet roller 11. The yarn Y is wound around 5 godet rollers 11a to 11e at a winding angle of less than 270 °. That is, the yarn Y is wound around each of the godet rollers 11a to 11e by not more than one turn. Therefore, the yarn Y is sequentially fed by the 5 godet rollers 11a to 11e, and travels from the yarn introduction port 16a to the yarn exit port 16b along a curved yarn path that does not intersect halfway in a plane parallel to the paper surface of fig. 1.
The 5 godet rollers 11a to 11e are driven to rotate by motors, not shown. Each of the 5 godet rollers 11a to 11e is a yarn heating roller having a heater therein.
Of the 5 godet rollers 11, 3 godet rollers 11a to 11c located on the lower side and on the upstream side in the yarn running direction are yarn heating rollers for heating the plurality of yarns Y to a temperature capable of being drawn in advance. In the case of a yarn made of polyester fibers, the glass transition temperature of the yarn Y is about 80 ℃, and the heating temperature (the temperature of the roller surface) of the 3 godet rollers 11a to 11c is set to a temperature slightly higher than the glass transition temperature (for example, 80 to 95 ℃). On the other hand, the 2 godet rollers 11d and 11e located on the downstream side in the running direction of the upper yarn are yarn heating rollers for heat-setting the stretched state of the plurality of yarns Y. The heating temperature (the temperature of the roll surface) of the 2 godet rolls 11d and 11e is set to a temperature (for example, 120 to 150 ℃) higher than the heating temperature of the lower 3 godet rolls 11a to 11 c. The feeding speed of the upper 2 godet rollers 11d and 11e is faster than that of the lower 3 godet rollers 11a to 11 c.
The plurality of yarns Y introduced into the heat-insulating box 16 are first heated to a temperature at which they can be drawn, i.e., a glass transition temperature, while being conveyed by the lower 3 godet rollers 11a to 11 c. Subsequently, the plurality of filaments Y preheated to the glass transition temperature are drawn by the difference in the wire feeding speed between the 2 godet rollers 11c, 11 d. Then, the plurality of yarns Y are heated to a higher temperature while being conveyed by the upper 2 godet rollers 11d, 11e, and are heat-set in a stretched state. The plurality of yarns Y stretched as described above are led out from the yarn lead-out port 16b to the outside of the heat insulating box 16, and then are conveyed to the yarn winding device 4 by the guide roller 18. The guide roller 18 and a roller cover 40 described later that covers the guide roller 18 will be described in detail later.
Thread take-up device
The yarn winding device 4 is disposed below the spinning and drawing device 3. The yarn winding device 4 includes a creel 27 and a contact roller 28. The creel 27 has a cylindrical shape extending in the front-rear direction, and is rotationally driven by a motor not shown. A plurality of bobbins 29 are mounted in parallel on the creel 27 in the axial direction thereof. The yarn winding device 4 rotates the creel 27 to simultaneously wind the plurality of yarns Y around the plurality of bobbins 29, thereby forming a plurality of winding packages 9. The contact roller 28 is a roller extending in the front-rear direction. The touch roller 28 touches the surface of the plurality of winding packages 9 and applies a predetermined contact pressure to the surface, thereby carding the shape of the winding packages 9.
Guide roller, roller cover
The guide roller 18 and the roller cover 40 will be explained below. As shown in fig. 1 to 3, the guide roller 18 is, for example, a roller having an outer diameter Dr of about 110mm and extending in the front-rear direction, and is disposed at substantially the same height as the yarn exit 16b of the heat insulating box 16. The yarn Y fed from the heat-insulating box 16 is wound around a guide roller 18. The winding angle θ of the yarn Y on the guide roller 18 is, for example, about 90 °. The guide roller 18 then feeds the yarn Y fed from the heat insulating box 16 to the yarn winding device 4 disposed below. Further, a flange portion 31 having an outer diameter Df larger than the outer diameter Dr of the guide roller 18 (e.g., about 160mm) is provided at the root end of the guide roller 18. The motor 32 is attached to the flange portion 31, and the guide roller 18 is rotationally driven by the motor 32. At this time, the motor 32 rotationally drives the guide roller 18 at a rotational speed at which the traveling speed of the outer peripheral surface 18a of the guide roller 18 is set to 1000m/min to 6000 m/min.
The guide roller 18 is covered with a roller cover 40. The roller cover 40 is made of, for example, a synthetic resin material or a metal material, and is attached to the frame 51 of the take-up device 1 to which the guide roller 18 is attached. The roll mantle 40 has a 1 st part 41, a 2 nd part 42 and a 3 rd part 43.
The 1 st portion 41 is formed in a cylindrical shape (the inner wall surface 41a is circular when viewed from the axial direction of the guide roller 18), and is disposed so as to surround the outer circumferential surface 18a of the guide roller 18. The 1 st segment 41 and the guide roller 18 are coaxially arranged about the same axis J. The inner diameter Dc of the 1 st portion 41 is 1.6 times or more and 1.9 times or less the outer diameter Dr of the guide roller 18. That is, the distance (Dc/2) of the inner wall surface 41a from the axis J at any portion is 1.6 times or more and 1.9 times or less the radius (Dr/2) of the guide roller 18. For example, the outer diameter Dr of the guide roller 18 is about 110mm, and the inner diameter Dc of the 1 st portion 41 is 190mm to 220 mm. In the present embodiment, the difference between the distance of the inner wall surface 41a from the axis J and the radius of the guide roller 18 ([ Dc/2] - [ Dr/2]) is 40mm to 55 mm. The difference is fixed to any portion of the inner wall surface 41 a. Further, a gap 46 having a distance C between the outer peripheral surface 18a and the inner wall surface 41a of the 1 st portion 41 of 40mm to 55mm is formed between the outer peripheral surface 18a of the guide roller 18 and the inner wall surface 41a of the 1 st portion 41 by a difference between the outer diameter Dr of the guide roller 18 and the inner diameter Dc of the 1 st portion 41. In the present embodiment, the interval C is fixed regardless of the portion of the gap 46.
The 1 st segment 41 extends over the entire length of the guide roller 18 in the axial direction of the guide roller 18, and extends forward of the tip of the guide roller 18. A yarn introduction port 44 is formed in a portion of the 1 st portion 41 located at a height substantially equal to the upper end of the guide roller 18. A yarn exit 45 is formed in a portion where the lower end of the 1 st portion 41 is located substantially at the right end of the guide roller 18 in the left-right direction. The yarn Y guided out of the insulation box 16 from the godet 11e is guided into a space in the roller cover 40 where the guide roller 18 is disposed through the yarn introduction port 44. The yarn Y fed by the guide roller 18 is led out of the roller cover 40 through the yarn outlet 45, and is fed to the yarn winding device 4. The yarn introducing port 44 and the yarn discharging port 45 are elongated in the axial direction of the guide roller 18, and for example, the length Ls in the axial direction of the guide roller 18 is about 134mm and the width Ws is about 10 mm.
The 2 nd portion 42 is opposed to the tip end surface 18b of the guide roller 18 in the front-rear direction. The 2 nd segment 42 is a circle having substantially the same diameter as the 1 st segment 41 as viewed in the axial direction of the guide roller 18, and is continuous with the end portion on the front side of the 1 st segment 41. The 3 rd portion 43 is provided at the end of the 1 st portion 41 on the rear side. The 3 rd portion 43 protrudes from the 1 st portion 41 to the outside in the radial direction of the guide roller 18, and is formed into an approximately rectangular shape as viewed in the axial direction of the guide roller 18. The 3 rd portion 43 is fixed to the frame 51 by bolts or the like not shown.
In the present embodiment, the guide roller 18 is disposed in the space surrounded by the frame 51 and the roller cover 40 (the 1 st part 41 and the 2 nd part 42) by attaching the roller cover 40 to the frame 51. The space communicates with the outside only through the yarn introducing port 44 and the yarn introducing port 45.
Wherein the guide roller 18 stirs the surrounding air when the guide roller 18 rotates to convey the yarn Y. At this time, if the energy consumed by the guide roller 18 to agitate the surrounding air, that is, the power consumption is large, the power consumption of the motor 32 becomes large. Therefore, in the present embodiment, the amount of air surrounding the outer peripheral surface 18a of the guide roller 18 is reduced by covering the guide roller 18 with the roller cover 40, thereby reducing power consumption.
In this case, if only the amount of air surrounding the outer peripheral surface 18a of the guide roller 18 is considered to be reduced, it is considered to be preferable to reduce the inner diameter Dc of the 1 st portion 41 of the roller cover 40 as much as possible within a range larger than the outer diameter Dr of the guide roller 18, and to reduce the volume of the gap 46 between the outer peripheral surface 18a of the guide roller 18 and the inner wall surface 41a of the 1 st portion 41 as much as possible.
However, in the present embodiment, the 1 st portion 41 is formed with a yarn introducing port 44 for introducing the yarn Y and a yarn discharging port 45 for discharging the yarn Y. When the yarn Y is introduced into the space inside the roller cover 40 through the yarn introduction port 44, an air flow (wake) generated around the running yarn Y flows into the space inside the roller cover 40 from the yarn introduction port 44 together with the yarn Y. When the yarn Y is guided out of the roller cover 40 through the yarn guide-out port 45, an air flow (wake) generated around the running yarn Y flows out of the roller cover 40 from the yarn guide-out port 45 together with the yarn Y. Thus, the smaller the volume of the gap 46, the greater the effect of these wake flows on the flow of air within the gap 46. Therefore, if the volume of the gap 46 of the 1 st part 41 is too small (the inner diameter Dc is too small), large turbulence of the airflow may occur in the gap 46 due to the wake effect, and the power consumption may be increased.
Therefore, in the present embodiment, as described above, the inner diameter Dc of the 1 st portion 41 is set to be 1.6 times or more and 1.9 times or less the outer diameter Dr of the guide roller 18, whereby the gap 46 of 40mm or more and 55mm or less is formed between the outer peripheral surface 18a of the guide roller 18 and the inner wall surface 41a of the 1 st portion 41. Thus, as is clear from the analysis results and the experimental results described below, the power consumption can be effectively reduced.
In the present embodiment, the 1 st portion 41 is formed in a cylindrical shape, and the center axes of the 1 st portion 41 and the guide roller 18 are made the same, so that the distance between the outer peripheral surface 18a of the guide roller 18 and the inner wall surface 41a of the 1 st portion 41 is fixed, and the airflow in the gap 46 is easily stabilized. This can effectively reduce power consumption.
In the take-up device 1, the traveling speed of the outer peripheral surface 18a of the guide roller 18 is set to a high speed of about 1000m/min to 6000m/min, and power consumption is large if the roller cover 40 is not provided. In contrast, in the present embodiment, by making the roll cover 40 have the above-described dimensions, the power consumption can be effectively reduced as is clear from the analysis results and the experimental results described below.
[ examples ] A method for producing a compound
Specific examples of the present invention are explained below.
EXAMPLES 1 to 3, COMPARATIVE EXAMPLES 1 to 6
In examples 1 to 3 and comparative examples 1 and 2, the power consumption was calculated using the analysis models shown in fig. 4 and 5 corresponding to the guide roller 18 and the roller cover 40 similar to those of the above-described embodiments. In comparative examples 3 to 5, the power consumption was calculated using the analysis model shown in fig. 6.
In the analysis model of fig. 4 and 5, the outer diameter Dr of the guide roller 18 is set to 110mm, and the outer diameter Df of the flange 31 is set to 160 mm. The length Lr of the entire guide roller 18 including the flange 31 in the axial direction was 217.5mm, the length Lc of the space formed by the roller cover 40 and the frame 51 in the axial direction of the guide roller 18 was 237.5mm, and the distance K1 between the tip end surface 18b of the guide roller 18 and the 2 nd portion 42 of the roller cover 40 was 10 mm. The height H of the frame body 51 was set to 240 mm. The thickness Tc of the roll mantle 40 was set to 10 mm. The yarn introducing port 44 and the yarn discharging port 45 are both 134mm in length Ls and 10mm in width Ws in the axial direction of the guide roller 18.
In the analysis model of fig. 4 and 5, the inner diameter Dc of the 1 st portion 41 is fixed. In examples 1 to 3, the inner diameters Dc were set to 220mm, 200mm and 190mm, respectively. In comparative examples 1 and 2, the inner diameters Dc were 280mm and 240mm, respectively.
On the other hand, in the analysis model of fig. 6, the inner diameter Db of the portion of the 1 st portion 41 surrounding the flange 31 of the guide roller 18 is set to 180mm, and the inner diameter Dc of the portion surrounding the portion on the tip side of the flange 31 is set to be smaller than the inner diameter Db. In comparative examples 3 to 5, the inner diameters Dc were 160mm, 140mm and 120mm, respectively. Further, the distance K3 between the tip of the flange 31 and the tip of the inner wall surface of the portion surrounding the flange 31 in the axial direction of the guide roller 18 was set to 10 mm. The length of the analysis model of fig. 6 is the same as that of the analysis models of fig. 4 and 5 except for the above. In comparative examples 3 to 5, the reason why the analytical model of fig. 6 was used instead of the analytical model of fig. 4 and 5 was that the inner diameter Dc was equal to or smaller than the outer diameter Df (160 mm) of the flange portion 31, and the guide roller 18 was not accommodated in the roller cover 40 in the analytical models of fig. 4 and 5.
In comparative example 6, the power consumption was calculated using an analysis model obtained by removing the roll cover 40 from the analysis models shown in fig. 4 and 5.
In examples 1 to 3 and comparative examples 1 to 6, the traveling speed of the outer peripheral surface 18a of the guide roller 18 was set to 5000 m/min. Then, as shown in fig. 4 to 6, the analysis was performed by running the strip B having a width Lb of 124mm and a thickness Tb of 0.088 mm. The band B is a simplified unit in which 32 threads Y having a diameter of 0.088mm (83 dtex/36f) are arranged at 4mm intervals. Further, the distance K4 between the end portion of the strip body B on the leading end side of the guide roller 18 and the leading end of the guide roller 18 was set to 30 mm. The winding angle θ of the strip B to the guide roller 18 is set to 90 °. Further, a portion of the strip B upstream of the portion wound around the guide roller 18 is extended in parallel with the left-right direction, and the length Lb1 is set to 120 mm. Further, a portion of the strip B downstream of the portion wound around the guide roller 18 extends in parallel with the vertical direction, and the length Lb2 is set to 120 mm.
A position on a circumference having a diameter De (500 mm) with the center axis (axis J) of the guide roller 18 as the center is defined as a radial outflow boundary Ek of the guide roller 18. A position which is located on the opposite side of the frame 51 with respect to the axial center of the guide roller 18 including the flange 31 and which is located at a distance Le1 (150 mm) from the axial center of the guide roller 18 including the flange 31 is defined as an outflow boundary Ej1 on the front side in the axial direction of the guide roller 18. A position which is located on the frame 51 side with respect to the axial center of the guide roller 18 including the flange 31 and which is located at a distance Le2 (150 mm) from the axial center of the guide roller 18 including the flange 31 is defined as an outflow boundary Ej2 on the rear side in the axial direction of the guide roller 18.
Then, for the flow of air, the k-epsilon turbulence model is applied to the following main equations (1) and (2), and approximate solutions are calculated by discretization and iterative methods using a finite volume method. Where equation (1) means that the fluid is an uncompressed fluid. Equation (2) is the RANS equation. In the analysis of examples 1 to 3 and comparative examples 1 to 6, the front-back direction was the x-direction, the left-right direction was the y-direction, and the up-down direction was the z-direction.
[ EQUATION 1 ]
div U＝0··················(1)
P: pressure of
t: time of day
x, y, z: coordinate axes
U: average velocity component
u ', v ', w ': u, v, w variation component
ρ: density of air
μ: coefficient of kinematic viscosity
The torque M acting on the guide roller 18 is obtained by numerical calculation, and the power consumption L is calculated by L ═ M Ω. Where Ω is the angular velocity of the guide roller 18. The torque M is calculated using the pressure P obtained by numerical calculation using the relational expressions (1) and (2) and the following expressions (3), (4), and (5). The pressure P obtained by numerical calculation using the above relational expressions (1) and (2) corresponds to Pf of the following relational expression (4).
[ equation 2]
rf: element f relative to x0Position (x) of0To obtain the point of torque)
Pf: pressure of element f
Pref: reference pressure
The analysis was performed using CDF software "STAR-CCM +" manufactured by CD-adapt Co. FIGS. 7(a) and (b) show the analysis results of examples 1 to 3 and comparative examples 1 to 6. As shown in fig. 7(a) and (b), if comparative example 6 is compared with examples 1 to 3 and comparative examples 1 to 5, it is understood that by providing the roller cover 40 covering the guide roller 18, the power consumption can be reduced as compared with the case where the roller cover 40 is not provided. Further, as is clear from comparison between examples 1 to 3 and comparative examples 1 to 5, when the roll cover 40 is provided, if the inside diameter Dc of the 1 st portion 41 is set to 190mm or more and 220mm or less (the distance between the inner wall surface 41a and the axis J, and the difference between Dc/2 and the radius Dr/2 of the guide roll 18 is set to 40mm or more and 55mm or less), the power consumption can be reduced by 25% or more.
< example 4 and comparative example 7>
In example 4, the power consumption of the motor 32 for rotationally driving the guide roller 18 covered with the roller cover 40, which is the same as the above-described embodiment, was measured using the apparatus shown in fig. 8 (a). More specifically, in example 4, an ac voltage supplied from an ac power supply 101 is transformed by a transformer 102, converted into a dc voltage by an inverter 103, and then output to a motor 32, thereby rotating and driving the motor 32. In example 4, a power meter 104 is connected between the inverter 103 and the motor 32, and the power meter 104 measures the power consumption of the motor 32.
In example 4, the outer diameter Dr of the guide roller 18 was set to 110mm, the outer diameter Df of the flange 31 was set to 160mm, and the inner diameter Dc of the 1 st portion 41 was set to 190 mm. The axial length Lr of the guide roller 18 including the flange 31 is 218mm, and the length Lc of the space formed by the roller cover 40 and the frame 51 in the axial direction of the guide roller 18 is 248 mm. And the height of the frame body 51 was set to 240 mm. The thickness Tc of the roll mantle 40 was set to 10 mm. The yarn introducing port 44 and the yarn discharging port 45 are both 134mm in length Ls and 10mm in width Ws in the axial direction of the guide roller 18. In example 4, 32 filaments Y made of a polyester material and having a diameter of 0.088mm (83 dtex/36f) were run at intervals of 4 mm. The winding angle of the yarn Y to the guide roller 18 is about 90 °. In example 4, the motor 32 was rotationally driven so that the traveling speed of the outer peripheral surface 18a of the guide roller 18 was about 5000m/min (the average speed was 4921 m/min).
Comparative example 7 the power consumption of the motor 32 was measured under the same conditions as in example 4 except that the roll cover 40 was removed from example 4.
Fig. 8(b) shows the experimental results of example 4 and comparative example 7. The "measured power" in fig. 8(b) is the power consumption of the motor 32 measured by the power meter 104 in fig. 8 (a). The power consumption in fig. 8(b) is calculated by subtracting the energy of the loss due to the motor 32 (≈ 79W) and the energy of the loss due to the tension of the yarn Y (≈ 110W) from the power consumption measured by the power meter 104. In which the energy lost by the motor 32 is obtained by measuring the consumed power by, for example, driving the motor 32 alone. The energy lost by the tension of the yarn Y is calculated from the difference between the power consumption of comparative example 7 and the power consumption (for example, 175W) measured by the power meter 104 when the motor 32 is driven without moving the yarn Y with the roller cover 40 removed.
When the power consumption of example 4 and comparative example 7 in fig. 8(b) are compared, it is understood that the power consumption can be effectively reduced by designing the roller cover 40 having the inner diameter Dc of the 1 st portion 41 of 190mm on the guide roller 18. Further, by comparing example 4 and comparative example 7 with example 3 and comparative example 6, it is understood that the analysis results and the experiment results are approximately the same.
Among these, the analysis results of examples 1 to 3 and comparative examples 1 to 6 and the experimental results of example 4 and comparative example 7 are the results when the traveling speed of the outer peripheral surface 18a of the guide roller 18 was set to 5000 m/min. Also, if the traveling speed of the outer peripheral surface 18a of the guide roller 18 is changed, the magnitude of the air flow generated in the gap 46 also changes. However, if the shape of the guide roller 18, the shape of the roller cover 40, and the rotation direction of the guide roller 18 are the same, the air flow in the gap 46 has a similar form. It is therefore inferred that in examples 1 to 3 and comparative examples 1 to 6 and in example 4 and comparative example 7, the same results as described above can be obtained even when the traveling speed of the outer peripheral surface 18a of the guide roller 18 is slower or faster than 5000 m/min.
Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and examples, and various modifications can be made within the scope described in the claims.
In the above embodiment, the traveling speed of the outer peripheral surface 18a of the guide roller 18 is 1000m/min to 6000m/min, but the present invention is not limited thereto. The traveling speed of the outer peripheral surface 18a of the guide roller 18 may be slower than 1000m/min or faster than 6000 m/min. As described above, even in the case where the traveling speed of the outer peripheral surface 18a of the guide roller 18 is slower than 1000m/min or faster than 6000m/min, similar results to those of the above-described embodiments 1 to 3 and comparative examples 1 to 6 and embodiments 4 and comparative example 7 can be obtained.
In the above embodiment, the 1 st portion 41 of the roller cover 40 has a cylindrical shape, the inner wall surface 41a of the 1 st portion 41 has a circular shape centered on the axis of the guide roller 18 when viewed in the axial direction of the guide roller 18, and the distance between the outer peripheral surface 18a of the guide roller 18 and the inner wall surface 41a of the 1 st portion 41 is constant at any portion of the gap 46, but the present invention is not limited thereto. For example, the inner wall surface 41a of the 1 st portion 41 may have a shape different from a circular shape, such as a polygon or an ellipse, when viewed from the axial direction of the guide roller 18. Even in this case, if the distance of the inner wall surface 41a of the 1 st portion 41 from the axis of the guide roller 18 at any portion is in the range of 1.6 times or more and 1.9 times or less of the radius Dr/2 of the guide roller 18, or the difference between the distance of the inner wall surface 41a of the 1 st portion 41 from the axis J at any portion and the radius Dr/2 of the guide roller 18 is in the range of 40mm or more and 55mm or less, the dispersion of the distance between the outer peripheral surface 18a of the guide roller 18 and the inner wall surface 41a of the 1 st portion 41 is not so large, and the air flow generated in the gap 46 is similar to that when the inner wall surface 41a is circular, and power consumption can be effectively reduced.
In the above embodiment, the space inside the roll cover 40 communicates with the outside only through the yarn introduction port 44 and the yarn exit port 45, but is not limited thereto. The roll cover 40 may be provided with holes, slits, or the like that communicate the space inside the roll cover with the outside to such an extent that the air flow in the internal space is not affected, in addition to the yarn introducing port 44 and the yarn discharging port 45.
In the above embodiment, the roller cover 40 is provided for the guide roller 18 for feeding the yarn Y guided out of the heat insulating box 16 to the yarn winding device 4, but the present invention is not limited thereto. For example, a roller cover may be provided for the guide roller 17 or the godet rollers 11a to 11 e. When the take-up device 1 includes a roller for feeding the yarn in addition to the godet rollers 11a to 11e and the guide rollers 17 and 18, a roller cover may be provided for the roller.
In addition, although the above description has been given of an example in which the present invention is applied to a take-up device that winds a yarn spun from a spinning device after drawing the yarn, the present invention is not limited to this. The present invention can be applied to a yarn processing apparatus having a yarn feeding roller other than the take-up device.
Claims (6)
1. A yarn processing device is characterized by comprising:
thread conveying roller for conveying thread, and
a roller cover covering the wire conveying roller;
the roller cover has:
a part disposed so as to surround an outer peripheral surface of the yarn feeding roller, that is, a 1 st part in which a yarn introducing port for introducing the yarn from the outside into a space in which the yarn feeding roller is disposed and a yarn introducing port for introducing the yarn from the inside to the outside are formed, and
a 2 nd portion connected to the 1 st portion, opposite to a tip end surface of the yarn feeding roller in an axial direction of the yarn feeding roller;
the distance of the inner wall surface of the 1 st portion from the central axis of the yarn feeding roller is within a range of 1.6 times or more and 1.9 times or less of the radius of the yarn feeding roller.
2. A yarn processing device is characterized by comprising:
thread conveying roller for conveying thread, and
a roller cover covering the wire conveying roller;
the roller cover has:
a part disposed so as to surround an outer peripheral surface of the yarn feeding roller, that is, a 1 st part in which a yarn introducing port for introducing the yarn from the outside into a space in which the yarn feeding roller is disposed and a yarn introducing port for introducing the yarn from the inside to the outside are formed, and
a 2 nd portion connected to the 1 st portion, opposite to a tip end surface of the yarn feeding roller in an axial direction of the yarn feeding roller;
the difference between the distance of the inner wall surface of the 1 st section from the central axis of the yarn feeding roller and the radius of the yarn feeding roller is within a range of 40mm to 55 mm.
3. The thread processing apparatus according to claim 1 or 2, wherein: the inner wall surface of the roller cover is circular with the axis of the yarn feeding roller as the center when viewed from the axis of the yarn feeding roller.
4. The yarn processing apparatus according to any one of claims 1 to 3, wherein: the running speed of the outer peripheral surface of the yarn conveying roller is within the range of 1000m/min to 6000 m/min.
5. A roller cover for covering a yarn feeding roller for feeding a yarn, comprising:
a part disposed so as to surround an outer peripheral surface of the yarn feeding roller, that is, a 1 st part in which a yarn introducing port for introducing the yarn from the outside into a space in which the yarn feeding roller is disposed and a yarn introducing port for introducing the yarn from the inside to the outside are formed, and
a 2 nd portion connected to the 1 st portion, opposite to a tip end surface of the yarn feeding roller in an axial direction of the yarn feeding roller;
the distance of the inner wall surface of the 1 st portion from the central axis of the yarn feeding roller is within a range of 1.6 times or more and 1.9 times or less of the radius of the yarn feeding roller.
6. A roller cover for covering a yarn feeding roller for feeding a yarn, comprising:
a part disposed so as to surround an outer peripheral surface of the yarn feeding roller, that is, a 1 st part in which a yarn introducing port for introducing the yarn from the outside into a space in which the yarn feeding roller is disposed and a yarn introducing port for introducing the yarn from the inside to the outside are formed, and
a 2 nd portion connected to the 1 st portion, opposite to a tip end surface of the yarn feeding roller in an axial direction of the yarn feeding roller;
the difference between the distance of the inner wall surface of the 1 st section from the central axis of the yarn feeding roller and the radius of the yarn feeding roller is within a range of 40mm to 55 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017096963A JP6998132B2 (en) | 2017-05-16 | 2017-05-16 | Thread processing equipment and roller cover |
| JP2017-096963 | 2017-05-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108866659A CN108866659A (en) | 2018-11-23 |
| CN108866659B true CN108866659B (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810424644.1A Active CN108866659B (en) | 2017-05-16 | 2018-05-07 | Yarn processing device and roller cover |
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| Country | Link |
|---|---|
| EP (1) | EP3403960B1 (en) |
| JP (1) | JP6998132B2 (en) |
| CN (1) | CN108866659B (en) |
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| CN106192036A (en) * | 2015-05-25 | 2016-12-07 | 日本Tmt机械株式会社 | Yarn heating apparatus |
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| JPH0235825Y2 (en) * | 1985-10-04 | 1990-09-28 | ||
| JPH07278990A (en) * | 1994-03-31 | 1995-10-24 | Toray Ind Inc | Apparatus for heat treatment of filament yarn |
| US5915699A (en) * | 1997-10-24 | 1999-06-29 | E. I. Du Pont De Nemours And Company | Heated enclosure |
| EP1805358B1 (en) | 2004-10-14 | 2011-03-23 | Oerlikon Textile GmbH & Co. KG | Galette for guiding, heating and transporting a thread |
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- 2018-05-08 EP EP18171191.2A patent/EP3403960B1/en active Active
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| JPS4839719A (en) * | 1971-09-21 | 1973-06-11 | ||
| JPS6111661U (en) * | 1984-06-25 | 1986-01-23 | 東レ株式会社 | Rotating roll accompanying airflow prevention device |
| JP2002371429A (en) * | 2001-06-08 | 2002-12-26 | Teijin Ltd | Hot roller device |
| JP2003166142A (en) * | 2001-09-20 | 2003-06-13 | Toray Ind Inc | Apparatus and method for producing synthetic fiber |
| JP2012229504A (en) * | 2011-04-26 | 2012-11-22 | Tmt Machinery Inc | Yarn heating apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3403960A1 (en) | 2018-11-21 |
| JP2018193631A (en) | 2018-12-06 |
| JP6998132B2 (en) | 2022-01-18 |
| CN108866659A (en) | 2018-11-23 |
| EP3403960B1 (en) | 2020-06-17 |
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