A wide-width sheet shuttle loom with controllable weft insertion speed and a control method thereof

Abstract

A kind of wide piece shuttle weaving machine with controllable weft insertion speed, including piece shuttle, weft insertion track and three-axis mobile suction cup, weft insertion track includes permanent magnet array track and electromagnetic coil array track, electromagnetic coil array track is arranged on the two sides of permanent magnet array track, the two ends of weft insertion track are provided with three-axis mobile suction cup, synchronous belt is arranged between three-axis mobile suction cup, three-axis mobile suction cup is used to suck piece shuttle to move back and forth on the synchronous belt directly above weft insertion track, piece shuttle includes shuttle body and dewar container, the two sides of shuttle body are symmetrically installed with permanent magnet array that interacts with electromagnetic coil array track to realize the weft insertion movement of piece shuttle, the inside of shuttle body is installed with weft gripper for clamping weft, the bottom of shuttle body is connected with the top of dewar container, dewar container is filled with liquid nitrogen, the bottom of dewar container is inserted with superconductor that interacts with permanent magnet array track to realize the suspension of piece shuttle.The design not only improves the width of loom, but also improves the adaptability of weft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile equipment, in particular to a wide-width piece shuttle loom with controllable weft insertion speed and a control method thereof. BACKGROUND

[0002] In the existing electromagnetic weft insertion technology, the piece shuttle is usually made of a metal non-magnetic conductor. In an alternating magnetic field, the piece shuttle first generates an induced current, and then generates a magnetic field. Then, the piece shuttle and the external electromagnetic coil generate a magnetic field effect, realizing the driving, braking and suspension of the piece shuttle. However, this process involves complex calculation and control. The magnetic field strength generated by the piece shuttle cannot be directly obtained, and needs to be calculated through two conversions of magnetic generation and electric generation, that is, the induced current generated by the piece shuttle in the alternating magnetic field is calculated first. The calculation process involves the change of the magnetic field and the speed of the piece shuttle. Then, the induced magnetic field is calculated through the induced current, so as to obtain the strength of the magnetic field generated by the piece shuttle. The calculation process is relatively complex and the calculation accuracy is not high, so that the speed of the piece shuttle is uncontrollable. In addition, the driving of the piece shuttle is carried out on the track. Although the problems of large impact and large noise of the traditional twisted shaft projection are solved, the friction during driving still exists, so that the application range of the piece shuttle weft insertion is relatively narrow.

[0003] At present, in the field of wide-width piece shuttle looms, the common solution to realize wider width is to increase the launching speed of the piece shuttle. The greater the speed, the farther the distance the piece shuttle flies in a short time. For the traditional twisted shaft projection piece shuttle loom, the impact bearing capacity of the piece shuttle has a certain upper limit due to the limitation of the material strength of the piece shuttle, causing the limitation of the speed, and the width is difficult to continue to increase. For the newly emerging electromagnetic projection technology, greater speed means that greater current is needed, and the carrying capacity of the coil also has an upper limit. The current that can be passed is also limited, and the projection speed cannot continue to be improved. The width is limited. At the same time, passing a larger current will also generate more heat. In addition, for weft, faster speed will also cause weft breakage to occur more easily, so that faster launching speed will also limit the strength of weft, and can only be used for weft with greater strength. SUMMARY

[0004] The purpose of the present application is to overcome the defects and problems of narrow width and narrow weft adaptability of the loom in the prior art, and to provide a wide-width piece shuttle loom with controllable weft insertion speed and a control method thereof, which has wider width and wider weft adaptability.

[0005] To achieve the above objectives, the technical solution of the present invention is: a wide-width rapier loom with controllable weft insertion speed, comprising a rapier shuttle, a weft insertion track, and a three-axis moving suction cup. The weft insertion track includes a permanent magnet array track and an electromagnetic coil array track, with the electromagnetic coil array track positioned on both sides of the permanent magnet array track. The three-axis moving suction cup is positioned at both ends of the weft insertion track, and a synchronous belt is positioned between the three-axis moving suction cups. The three-axis moving suction cup is used to pick up the rapier shuttle and move it back and forth above the weft insertion track and on the synchronous belt. The rapier shuttle includes a shuttle... The shuttle body and the Dewar container are equipped with a permanent magnet array symmetrically mounted on both sides of the shuttle body, which interacts with the electromagnetic coil array track to realize the weft insertion movement of the shuttle. The shuttle body is equipped with a weft clamp for holding the weft thread. The bottom of the shuttle body is connected to the top of the Dewar container, which is filled with liquid nitrogen. A superconductor that interacts with the permanent magnet array track to realize the levitation of the shuttle is inserted at the bottom of the Dewar container. The superconductor is in contact with the liquid nitrogen. The Dewar container has through holes for injecting liquid nitrogen and discharging liquid nitrogen vapor.

[0006] The coils on the electromagnetic coil array track are grouped in sets of three, with each group carrying a three-phase alternating current, and each coil carrying an alternating current with a phase difference of 120 degrees.

[0007] The shuttle body includes a shuttle body and a shuttle head. The shuttle body includes an upper shuttle body and a lower shuttle body arranged symmetrically. A first through groove is formed in the middle of the lower end face of the upper shuttle body along its length direction. A second through groove is formed in the middle of the upper end face of the lower shuttle body along its length direction. The second through groove and the first through groove form a through cavity. The weft clamp is installed in the through cavity. The gap between the two sides of the upper shuttle body and the two sides of the lower shuttle body forms a first mounting groove. The permanent magnet array is installed in the first mounting groove. The shuttle head is inserted into one end of the through cavity. The other end of the through cavity is used for the weft thread to pass through and be clamped by the weft clamp.

[0008] An upper mounting groove is formed on the lower end face of the upper shuttle body on both sides of the first through groove, and a lower mounting groove is formed on the upper end face of the lower shuttle body on both sides of the second through groove. The lower mounting groove and the upper mounting groove together form the second mounting groove, and a magnetic shielding block is installed in the second mounting groove.

[0009] The upper end face of the upper shuttle body and the lower end face of the lower shuttle body are provided with rivet holes, and the upper shuttle body, the lower shuttle body and the weft clamp are connected to each other through the rivet holes.

[0010] Both the upper end face of the upper shuttle body and the lower end face of the lower shuttle body are provided with round holes, which are used to insert the tapered rod that opens the weft clamp.

[0011] The Dewar container comprises a Dewar upper cover and a Dewar container body, a blind hole is formed in the lower end face of the Dewar upper cover, a mounting through hole is formed in the lower end face of the Dewar container body, the mounting through hole comprises a first mounting hole and a second mounting hole which are connected in communication, the diameter of the first mounting hole is larger than that of the second mounting hole, the superconductor is in a cylindrical structure, one end of the superconductor is mounted in the blind hole, and the other end of the superconductor is mounted in the first mounting hole, and a through hole is formed in the side wall of the Dewar container body.

[0012] The synchronous belt comprises a first synchronous belt and a second synchronous belt, the first synchronous belt is located above the side of the second synchronous belt, a connecting plate is arranged between the first synchronous belt and the second synchronous belt, and a first liquid nitrogen pool matched with the Dewar container is arranged in the middle of the second synchronous belt.

[0013] The wide-width piece weaving machine further comprises a cooling device, the cooling device is located at the end of the synchronous belt, the cooling device comprises a plurality of first columns, a plurality of second columns, and a second liquid nitrogen pool matched with the superconductor, the plurality of first columns are symmetrically distributed on the two sides of the second liquid nitrogen pool, the plurality of second columns are symmetrically distributed on the two sides of the second liquid nitrogen pool, and the second column is located between the two adjacent first columns, the second column is slidably connected to the supporting column, and a plurality of triangular blocks for carrying the piece shuttle are hinged to the first column and the second column from top to bottom.

[0014] A control method of a wide-width piece weaving machine with controllable weft insertion speed, the control method comprises the following steps: first, the piece shuttle is sucked by the three-axis moving suction disc at the first end, and the piece shuttle is moved to the upper side of the weft insertion track, at this time, the superconductor is in a static suspension state under the action of the permanent magnet array track, then the current is controlled to pass through the electromagnetic coil array track to generate a traveling wave magnetic field, the traveling wave magnetic field interacts with the permanent magnet arrays on the two sides of the piece shuttle to provide driving force for the piece shuttle, and the piece shuttle is pulled forward, when the piece shuttle moves to the upper side of the weft insertion track, the current opposite to the previous current is passed through the electromagnetic coil array track, the electromagnetic coil array track interacts with the permanent magnet arrays on the two sides of the piece shuttle to provide braking force for the piece shuttle, the piece shuttle slows down until it hovers, then the piece shuttle is sucked by the three-axis moving suction disc at the end, and the piece shuttle is placed on the synchronous belt, the synchronous belt transports the piece shuttle to the three-axis moving suction disc at the first end, in the transportation process, the liquid nitrogen is injected into the Dewar container through the through hole to cool the superconductor, and finally the piece shuttle is moved to the upper side of the weft insertion track by the three-axis moving suction disc at the first end for the next weft insertion.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. In the wide-width piece shuttle loom with controllable weft insertion speed and the control method thereof, the weft insertion track comprises a permanent magnet array track and an electromagnetic coil array track, the electromagnetic coil array track is arranged on both sides of the permanent magnet array track, three-axis moving suction cups are arranged at both ends of the weft insertion track, a synchronous belt is arranged between the three-axis moving suction cups, the three-axis moving suction cups are used for sucking the piece shuttle to move back and forth on the synchronous belt directly above the weft insertion track; the bottom of the shuttle body is connected with the top of a Dewar container, the Dewar container is filled with liquid nitrogen, a superconductor for realizing the suspension of the piece shuttle by interacting with the permanent magnet array track is inserted into the bottom of the Dewar container, the superconductor is in contact with the liquid nitrogen, and a through hole for injecting the liquid nitrogen and discharging volatile gas of the liquid nitrogen is arranged on the Dewar container; the piece shuttle with the above structure is arranged directly above the permanent magnet array track, the superconductor enters a superconducting state after being cooled by the liquid nitrogen, and the stable suspension of the superconductor is realized, so that the piece shuttle is always in a suspended state; permanent magnet arrays for realizing the weft insertion movement of the piece shuttle by interacting with the electromagnetic coil array track are symmetrically arranged on both sides of the shuttle body, the electromagnetic coil array track generates a traveling wave magnetic field after current is passed through the electromagnetic coil array track, the electromagnetic force between the traveling wave magnetic field and the piece shuttle is changed by changing the strength of the traveling wave magnetic field, so that the speed control of the piece shuttle is realized, and the wide-width weft insertion at an arbitrary speed is realized; meanwhile, the speed control of the piece shuttle in the suspended state can realize the weft insertion of a wider width, the adaptability of weft is wider, the weft breakage phenomenon is not prone to occur by controlling the arbitrary speed. Therefore, the loom width is improved, and the adaptability of weft is improved.

[0017] 2. In the wide-width piece shuttle loom with controllable weft insertion speed and the control method thereof, the coils on the electromagnetic coil array track are grouped into three groups, three-phase alternating current is passed through each group, and the alternating current with a phase difference of 120 degrees is passed through each coil, each coil generates a corresponding magnetic field, the magnetic fields are superimposed on each other to generate a traveling wave magnetic field, the direction of the traveling wave magnetic field is changed every time the piece shuttle moves forward by the distance of one magnetic pole, and the traveling wave magnetic field moves horizontally along with the change of the alternating current, that is, the magnetic pole on the track changes, so that the piece shuttle is continuously pulled to accelerate forward. Therefore, the operation is simple, and the speed control of the piece shuttle is realized.

[0018] 3、The invention is a kind of wide width sheet shuttle loom and its control method, the shuttle body includes symmetrically arranged upper shuttle body and lower shuttle body, which reduces the manufacturing difficulty of sheet shuttle;A through cavity is formed in the middle of the shuttle body along its length direction, and a weft gripper is installed in the through cavity;The gap between the two side faces of the upper shuttle body and the lower shuttle body constitutes a first installation slot, and a permanent magnet array is installed in the first installation slot;The shuttle head is inserted into one end of the through cavity, and the other end of the through cavity is used for the weft to pass through and be gripped by the weft gripper;The above-mentioned structure of the shuttle body is not only easy to install and disassemble, but also easy to use;An upper installation slot is formed on the lower end face of the upper shuttle body at the positions on both sides of the first through slot, and a lower installation slot is formed on the upper end face of the lower shuttle body at the positions on both sides of the second through slot;The lower installation slot and the upper installation slot constitute a second installation slot, and a magnetic separation block is installed in the second installation slot;The magnetic separation block is arranged to weaken the mutual influence between the magnetic fields, so that the permanent magnet array is only affected by the same horizontal wave magnetic field, and the influence of the other horizontal wave magnetic field is reduced;Rivet holes are formed on the upper end face of the upper shuttle body and the lower end face of the lower shuttle body, and the upper shuttle body, the lower shuttle body and the weft gripper are connected to each other through the rivet holes, which not only makes the installation and disassembly easy, but also improves the connection reliability;Round holes are formed on the upper end face of the upper shuttle body and the lower end face of the lower shuttle body, and when in use, the tapered rod is inserted into the round hole to open the weft gripper. Therefore, the invention is easy to install and disassemble, easy to use, has low manufacturing difficulty and high reliability.

[0019] 4、The invention is a kind of wide width sheet shuttle loom and its control method, a blind hole is formed on the lower end face of the upper cover of the Dewar, and an installation through hole is formed on the lower end face of the Dewar container body, the installation through hole includes a first installation hole and a second installation hole connected in communication, one end of the superconductor is installed in the blind hole, and the other end of the superconductor is installed in the first installation hole;The above-mentioned design makes the installation and disassembly of the superconductor easy and reliable;A through hole is formed on the side wall of the Dewar container body to provide liquid nitrogen for the inside of the Dewar container, so as to ensure that the superconductor maintains the superconducting state in the liquid nitrogen. Therefore, the invention is easy to install and disassemble, has high installation reliability and is easy to use.

[0020] 5、The invention is a kind of wide width sheet shuttle loom and its control method, the first synchronous belt is located above the second synchronous belt, a connecting plate is arranged between the first synchronous belt and the second synchronous belt, and a first liquid nitrogen pool matched with the Dewar container is arranged in the middle of the second synchronous belt;In use, the three-axis moving suction disc places the sheet shuttle on the first synchronous belt, the first synchronous belt drives the sheet shuttle to move to the second synchronous belt, the second synchronous belt drives the sheet shuttle to move, the Dewar container is soaked in the first liquid nitrogen pool to supplement liquid nitrogen, and then the three-axis moving suction disc takes away the sheet shuttle from the second synchronous belt. Therefore, the invention has good cooling effect and is easy to operate.

[0021] 6、The wide-width piece shuttle loom with controllable weft insertion speed and the control method thereof, wherein a plurality of first vertical columns are symmetrically distributed on both sides of the second liquid nitrogen pool, a plurality of second vertical columns are symmetrically distributed on both sides of the second liquid nitrogen pool, and the second vertical columns are located between the adjacent two first vertical columns, the second vertical columns are slidably connected to the supporting columns, and a plurality of triangular blocks for bearing the piece shuttles are hinged on the first vertical columns and the second vertical columns from top to bottom; in use, the piece shuttles are first placed on the triangular blocks of the second vertical columns through the three-axis moving suction disc, the second vertical columns drive the piece shuttles to move downward so that the dewar containers are soaked in the second liquid nitrogen pool to supplement liquid nitrogen, the piece shuttles are then carried by the triangular blocks of the first vertical columns through the second vertical columns driving the piece shuttles to move upward, and the piece shuttles are finally taken away from the triangular blocks through the three-axis moving suction disc. Therefore, the wide-width piece shuttle loom with controllable weft insertion speed has good cooling effect and is easy to operate. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the wide-width piece shuttle loom with controllable weft insertion speed in embodiment 5 of the present application.

[0023] Figure 2 is a structural schematic diagram of the wide-width piece shuttle loom with controllable weft insertion speed in embodiment 6 of the present application.

[0024] Figure 3 is a structural schematic diagram of the weft insertion track in the present application.

[0025] Figure 4 is a working state schematic diagram of the piece shuttle and the weft insertion track in the present application.

[0026] Figure 5 is a three-dimensional structural schematic diagram of the piece shuttle from one perspective in the present application.

[0027] Figure 6 is a three-dimensional structural schematic diagram of the piece shuttle from another perspective in the present application.

[0028] Figure 7 is an internal structural schematic diagram of the piece shuttle in the present application.

[0029] Figure 8 is a structural schematic diagram of the shuttle body in the present application.

[0030] Figure 9 is a structural schematic diagram of the upper shuttle body and the lower shuttle body in the present application.

[0031] Figure 10 is a structural schematic diagram of the dewar container in the present application.

[0032] Figure 11 is a sectional view of the dewar container in the present application.

[0033] Figure 12 is Figure 1 a structural schematic diagram of the synchronous belt.

[0034] Figure 13 is Figure 2 The structure diagram of the cooling device in the middle synchronous belt.

[0035] Figure 14 is Figure 13 The structure diagram of the cooling device in the middle synchronous belt.

[0036] Figure 15 is Figure 13 The structure diagram of the cooling device in the middle synchronous belt.

[0037] Figure 16 is Figure 15 The structure diagram of the cooling device in the middle synchronous belt.

[0038] In the figure: the shuttle 1, the shuttle body 101, the Dewar container 102, the permanent magnet array 103, the weft gripper 104, the superconductor 105, the through hole 106, the shuttle body 107, the shuttle head 108, the through cavity 109, the first mounting slot 110, the upper shuttle body 111, the lower shuttle body 112, the first through slot 113, the second through slot 114, the upper mounting slot 115, the lower mounting slot 116, the second mounting slot 117, the magnetic isolation block 118, the rivet hole 119, the round hole 120, the Dewar upper cover 121, the Dewar container body 122, the second mounting hole 123, the weft guide rail 2, the permanent magnet array rail 201, the electromagnetic coil array rail 202, the three-axis moving suction disc 3, the synchronous belt 4, the first synchronous belt 401, the second synchronous belt 402, the connecting flat plate 403, the first liquid nitrogen pool 404, the cooling device 5, the first vertical column 501, the second vertical column 502, the second liquid nitrogen pool 503, the support column 504, the triangular block 505, the weft 6, the warp 7. DETAILED DESCRIPTION

[0039] The application is further described in detail in the following description and specific embodiments in conjunction with the accompanying drawings.

[0040] Referring to Figures 1 to 16The utility model provides a wide width piece shuttle loom of weft insertion speed controllable, including piece shuttle 1, weft insertion rail 2 and three -axis mobile sucking disc 3, weft insertion rail 2 includes permanent magnet array track 201 and electromagnetic coil array track 202, electromagnetic coil array track 202 is arranged in the both sides of permanent magnet array track 201, and the both ends of weft insertion rail 2 are provided with three -axis mobile sucking disc 3, and synchronous belt 4 is arranged between three -axis mobile sucking disc 3, and three -axis mobile sucking disc 3 is used to suck piece shuttle 1 and moves back and forth on the synchronous belt 4 right above weft insertion rail 2, and piece shuttle 1 includes shuttle body 101 and dewar vessel 102, and the both sides of shuttle body 101 are symmetrically installed with permanent magnet array 103 and interact with electromagnetic coil array track 202 to realize the weft insertion motion of piece shuttle 1, and the inside of shuttle body 101 is installed with weft gripper 104 for clamping weft 6, and the bottom of shuttle body 101 is connected with the top of dewar vessel 102, and dewar vessel 102 is filled with liquid nitrogen, and the bottom of dewar vessel 102 is inserted with superconductor 105 and interacts with permanent magnet array track 201 to realize the suspension of piece shuttle 1, and superconductor 105 is in contact with liquid nitrogen, and the upper portion of dewar vessel 102 is provided with through -hole 106 for injecting liquid nitrogen and discharging liquid nitrogen volatile gas.

[0041] The coils on the electromagnetic coil array track 202 are grouped in sets of three, each set is connected to a three-phase alternating current, and each coil is connected to an alternating current with a phase difference of 120 degrees.

[0042] The shuttle body 101 includes a shuttle body 107 and a shuttle head 108, the shuttle body 107 includes an upper shuttle body 111 and a lower shuttle body 112 arranged symmetrically, a first through slot 113 is formed in the middle of the lower end surface of the upper shuttle body 111 along its length direction, a second through slot 114 is formed in the middle of the upper end surface of the lower shuttle body 112 along its length direction, the first through slot 113 and the second through slot 114 form a through cavity 109, the weft gripper 104 is installed in the through cavity 109, a first mounting slot 110 is formed between the two side surfaces of the upper shuttle body 111 and the lower shuttle body 112, the permanent magnet array 103 is installed in the first mounting slot 110, the shuttle head 108 is inserted into one end of the through cavity 109, and the other end of the through cavity 109 is used for the weft 6 to pass through and be clamped by the weft gripper 104.

[0043] An upper mounting slot 115 is formed on the lower end surface of the upper shuttle body 111 on both sides of the first through slot 113, a lower mounting slot 116 is formed on the upper end surface of the lower shuttle body 112 on both sides of the second through slot 114, the lower mounting slot 116 and the upper mounting slot 113 form a second mounting slot 117, and a magnetic isolation block 118 is installed in the second mounting slot 117.

[0044] The upper end surface of the upper shuttle body 111 and the lower end surface of the lower shuttle body 112 are both provided with rivet holes 119, and the upper shuttle body 111, the lower shuttle body 112 and the weft clipper 104 are connected to each other through the rivet holes 119.

[0045] The upper end surface of the upper shuttle body 111 and the lower end surface of the lower shuttle body 112 are both provided with round holes 120, and the round holes 120 are used for inserting a tapered rod for opening the weft clipper 104.

[0046] The Dewar container 102 includes a Dewar upper cover 121 and a Dewar container body 122, the lower end surface of the Dewar upper cover 121 is provided with a blind hole, the lower end surface of the Dewar container body 122 is provided with a mounting through hole, the mounting through hole includes a first mounting hole and a second mounting hole 123 connected in communication, the diameter of the first mounting hole is larger than the diameter of the second mounting hole 123, the superconductor 105 is in a cylindrical structure, one end of the superconductor 105 is mounted in the blind hole, the other end of the superconductor 105 is mounted in the first mounting hole, and the through hole 106 is formed in the side wall of the Dewar container body 122.

[0047] The synchronous belt 4 includes a first synchronous belt 401 and a second synchronous belt 402, the first synchronous belt 401 is located above the side of the second synchronous belt 402, a connecting plate 403 is arranged between the first synchronous belt 401 and the second synchronous belt 402, and a first liquid nitrogen pool 404 matched with the Dewar container 102 is arranged in the middle of the second synchronous belt 402.

[0048] The wide-width piece shuttle loom further includes a cooling device 5 located at the end of the synchronous belt 4, the cooling device 5 includes a plurality of first vertical columns 501, a plurality of second vertical columns 502, and a second liquid nitrogen pool 503 matched with the superconductor 105, the plurality of first vertical columns 501 are symmetrically distributed on both sides of the second liquid nitrogen pool 503, the plurality of second vertical columns 502 are symmetrically distributed on both sides of the second liquid nitrogen pool 503, and the second vertical columns 502 are located between adjacent two first vertical columns 501, the second vertical columns 502 are slidably connected to a support column 504, a plurality of triangular blocks 505 for carrying the piece shuttle 1 are hinged to the first vertical columns 501 and the second vertical columns 502 from top to bottom, and the three-axis moving suction disc 3 is further used for sucking the piece shuttle 1 to move back and forth on the synchronous belt 4 and the triangular blocks 505.

[0049] A control method of a wide-width piece shuttle loom with controllable weft insertion speed, the control method includes the following steps:

[0050] Firstly, the three-axis moving chuck 3 at the head end sucks the sheet shuttle 1 and moves the sheet shuttle 1 to the upper side of the weft insertion rail 2, at this time, the superconductor 105 is in a static suspension state under the action of the permanent magnet array track 201, then the electromagnetic coil array track 202 is controlled to pass current to generate a traveling wave magnetic field, the traveling wave magnetic field interacts with the permanent magnet array 103 on both sides of the sheet shuttle 1 to provide driving force for the sheet shuttle 1, and the sheet shuttle 1 is pulled forward, when the sheet shuttle 1 moves to the upper side of the weft insertion rail 2, the electromagnetic coil array track 202 passes current in the opposite direction, the electromagnetic coil array track 202 interacts with the permanent magnet array 103 on both sides of the sheet shuttle 1 to provide braking force for the sheet shuttle 1, the sheet shuttle 1 slows down until it hovers, then the three-axis moving chuck 3 at the tail end sucks the sheet shuttle 1 and places the sheet shuttle 1 on the synchronous belt 4, the synchronous belt 4 transports the sheet shuttle 1 to the three-axis moving chuck 3 at the head end, during the transportation process, liquid nitrogen is injected into the dewar container 102 through the through hole 106 to cool the superconductor 105, finally the three-axis moving chuck 3 at the head end moves the sheet shuttle 1 to the upper side of the weft insertion rail 2 to perform the next weft insertion.

[0051] The principle of the present application is described as follows:

[0052] The sheet shuttle designed in the present application makes the whole weft insertion process, including the throwing of the shuttle, the weft insertion and the stopping of the shuttle, be completed in the suspension process, eliminating the friction with the rail during the throwing of the shuttle in other solutions, and the sheet shuttle in the present application is provided with permanent magnet arrays on both sides, when the sheet shuttle is in the traveling wave magnetic field, the permanent magnet arrays interact with the traveling wave magnetic field to provide the sheet shuttle with a backward motion force, and can reverse the action to brake when the weft insertion is about to be completed, the driving and braking processes of the sheet shuttle do not need complex control, the electromagnetic force received by the sheet shuttle does not need complex conversion calculation, only the magnetic field strength generated by the electromagnetic coil needs to be calculated according to the current, and then the electromagnetic force between the electromagnetic and the permanent magnet on the sheet shuttle can be calculated.

[0053] The bottom of the piece shuttle is designed with a YBCO (yttrium barium copper oxide) superconductor array. The pinning effect of the superconductor enables the superconductor to lock the magnetic flux line inside the superconductor when it is cooled in a magnetic field environment. This feature ensures that the superconductor can achieve stable vertical and lateral suspension on the permanent magnet array track. After the superconductor is placed in a magnetic field and cooled by liquid nitrogen, the superconductor enters a superconducting state. The internal magnetic field of the superconductor is slightly different from that before cooling, but the external magnetic field of the superconductor is basically not affected. That is, as long as there is no relative movement between the superconductor and the permanent magnet, the superconductor will not be affected by the magnetic force. If the superconductor is released, it will move towards the permanent magnet under the influence of gravity. At this time, the interaction between the superconductor and the permanent magnet is repulsive force, which prevents it from moving towards the permanent magnet. When the repulsive force and the gravity are equal, the equilibrium position is reached, and the vertical suspension is achieved. When the piece shuttle moves laterally, the magnetic field in which the lower superconductor is located will also shift. Due to the magnetic flux pinning property of the superconductor, the magnetic flux line is bound inside the superconductor, hindering the change of the magnetic flux line, which macroscopically becomes a restraining force opposite to the direction of the superconductor offset, hindering the lateral offset of the superconductor, thereby achieving stable suspension of the superconductor.

[0054] Embodiment 1

[0055] Referring to Figures 1 to 7 A wide-width piece shuttle loom with controllable weft insertion speed includes a piece shuttle 1, a weft insertion track 2, and a three-axis moving chuck 3. The weft insertion track 2 includes a permanent magnet array track 201 and an electromagnetic coil array track 202 (the weft insertion track area covers the entire width), the electromagnetic coil array track 202 is arranged on both sides of the permanent magnet array track 201, the three-axis moving chuck 3 is arranged at both ends of the weft insertion track 2, a synchronous belt 4 is arranged between the three-axis moving chucks 3, the three-axis moving chucks 3 are used to suck the piece shuttle 1 to move back and forth above the weft insertion track 2 and on the synchronous belt 4, the piece shuttle 1 includes a shuttle body 101 and a Dewar container 102, permanent magnet arrays 103 are symmetrically installed on both sides of the shuttle body 101 to interact with the electromagnetic coil array track 202 to realize the weft insertion movement of the piece shuttle 1, a weft gripper 104 is installed inside the shuttle body 101 to hold weft 6, the bottom of the shuttle body 101 is connected with the top of the Dewar container 102, the Dewar container 102 is filled with liquid nitrogen, a superconductor 105 is inserted into the bottom of the Dewar container 102 to interact with the permanent magnet array track 201 to realize the suspension of the piece shuttle 1, the superconductor 105 is in contact with the liquid nitrogen, and a through hole 106 is formed in the Dewar container 102 for injecting liquid nitrogen and discharging volatile gas of the liquid nitrogen.

[0056] According to the above scheme, a control method of a wide-width piece shuttle weaving machine with controllable weft insertion speed, the control method comprises the following steps: first, the three-axis moving suction disc 3 at the head end absorbs the piece shuttle 1 and moves the piece shuttle 1 to the upper side of the head end of the weft insertion track 2, at this time, the superconductor 105 is in a stationary suspended state under the action of the permanent magnet array track 201, then the electromagnetic coil array track 202 is controlled to pass through the current to generate a traveling wave magnetic field, the traveling wave magnetic field interacts with the permanent magnet array 103 on both sides of the piece shuttle 1 to provide driving force for the piece shuttle 1, and the piece shuttle 1 is pulled forward, when the piece shuttle 1 moves to the upper side of the tail end of the weft insertion track 2, the electromagnetic coil array track 202 passes through the current opposite to the previous one, the electromagnetic coil array track 202 interacts with the permanent magnet array 103 on both sides of the piece shuttle 1 to provide braking force for the piece shuttle 1, the piece shuttle 1 slows down until it hovers, then the three-axis moving suction disc 3 at the tail end absorbs the piece shuttle 1 and places the piece shuttle 1 on the synchronous belt 4, the synchronous belt 4 transports the piece shuttle 1 to the three-axis moving suction disc 3 at the head end, during the transportation process, liquid nitrogen is injected into the Dewar container 102 through the through hole 106 to cool the superconductor 105, and finally the piece shuttle 1 is moved to the upper side of the head end of the weft insertion track 2 by the three-axis moving suction disc 3 at the head end for the next weft insertion.

[0057] Embodiment 2:

[0058] The basic content is the same as that of embodiment 1, except that:

[0059] Referring to Figure 3 , Figure 4 , the coils on the electromagnetic coil array track 202 are grouped in threes, each group passes through three-phase alternating current, and each coil passes through alternating current with a phase difference of 120 degrees.

[0060] Each coil generates a corresponding magnetic field, and the magnetic fields meet and superimpose to generate a traveling wave magnetic field, which interacts with the permanent magnet array on the piece shuttle to provide driving force for the movement of the piece shuttle, the direction of the traveling wave magnetic field is controlled according to the position feedback of the piece shuttle, and the direction of the traveling wave magnetic field needs to be changed every time the piece shuttle moves forward by the distance of one magnetic pole, with the change of the alternating current, the traveling wave magnetic field moves horizontally, that is, the magnetic poles on the track change, thereby continuously pulling the piece shuttle to accelerate forward. The size of the coil current can change the strength of the traveling wave magnetic field, thereby changing the electromagnetic force between the piece shuttle to realize the control of the speed of the piece shuttle.

[0061] Embodiment 3:

[0062] The basic content is the same as that of embodiment 1, except that:

[0063] Referring to Figures 5 to 9, the shuttle body 101 includes a shuttle body 107 and a shuttle head 108, the shuttle body 107 includes symmetrically arranged upper shuttle body 111 and lower shuttle body 112, the lower end surface of the upper shuttle body 111 is provided with a first through slot 113 in the middle along the length direction, the upper end surface of the lower shuttle body 112 is provided with a second through slot 114 in the middle along the length direction, the second through slot 114 and the first through slot 113 form a through cavity 109, the weft gripper 104 is installed in the through cavity 109, the gap between the two side surfaces of the upper shuttle body 111 and the lower shuttle body 112 forms a first mounting slot 110, the permanent magnet array 103 is installed in the first mounting slot 110, the shuttle head 108 is inserted into one end of the through cavity 109, the other end of the through cavity 109 is used for the weft 6 to pass through and be gripped by the weft gripper 104; the upper end surface of the upper shuttle body 111 is provided with an upper mounting slot 115 on both sides of the first through slot 113, the upper end surface of the lower shuttle body 112 is provided with a lower mounting slot 116 on both sides of the second through slot 114, the lower mounting slot 116 and the upper mounting slot 113 form a second mounting slot 117, the magnetic isolation block 118 is installed in the second mounting slot 117; the upper end surface of the upper shuttle body 111 and the lower end surface of the lower shuttle body 112 are both provided with rivet holes 119, the upper shuttle body 111, the lower shuttle body 112 and the weft gripper 104 are connected to each other through the rivet holes 119; the upper end surface of the upper shuttle body 111 and the lower end surface of the lower shuttle body 112 are both provided with round holes 120, the round holes 120 are used for inserting the tapered rod for opening the weft gripper 104.

[0064] Example 4:

[0065] The basic content is the same as that of example 1, except that:

[0066] See Figure 5 , Figure 10 , Figure 11 , the dewar container 102 includes a dewar upper cover 121 and a dewar container body 122, the lower end surface of the dewar upper cover 121 is provided with a blind hole, the lower end surface of the dewar container body 122 is provided with a mounting through hole, the mounting through hole includes a first mounting hole and a second mounting hole 123 connected in communication, the diameter of the first mounting hole is larger than that of the second mounting hole 123, the superconductor 105 is in a cylindrical structure, one end of the superconductor 105 is installed in the blind hole, the other end of the superconductor 105 is installed in the first mounting hole, the through hole 106 is provided on the side wall of the dewar container body 122.

[0067] Example 5:

[0068] The basic content is the same as that of example 1, except that:

[0069] Referring to Figure 1 、 Figure 12 , the synchronous belt 4 comprises a first synchronous belt 401 and a second synchronous belt 402, the first synchronous belt 401 is located above the side of the second synchronous belt 402, a connecting plate 403 is arranged between the first synchronous belt 401 and the second synchronous belt 402, and a first liquid nitrogen pool 404 matched with the Dewar container 102 is arranged in the middle of the second synchronous belt 402.

[0070] The synchronous belt is staggered up and down, which is equivalent to the piece shuttle entering the liquid nitrogen pool from above the liquid nitrogen pool. The method can realize the transportation of the superconductor while the superconductor is immersed in liquid nitrogen. In addition, since the liquid nitrogen pool is higher than the superconductor part, when the transportation reaches the end of the liquid nitrogen pool, the liquid nitrogen pool can also limit the piece shuttle, and the piece shuttle stops at a fixed position, waiting for the three-axis moving suction disc to suck the piece shuttle and transfer to the top of the permanent magnet array track for the next weft insertion.

[0071] Example 6:

[0072] The basic content is the same as that of example 1, except that:

[0073] Referring to Figure 2 、 Figure 13 、 Figure 14 、 Figure 15 、 Figure 16 , the wide-width piece shuttle loom further comprises a cooling device 5 located at the end of the synchronous belt 4, the cooling device 5 comprises a plurality of first upright columns 501, a plurality of second upright columns 502, and a second liquid nitrogen pool 503 matched with the superconductor 105, the plurality of first upright columns 501 are symmetrically distributed on both sides of the second liquid nitrogen pool 503, the plurality of second upright columns 502 are symmetrically distributed on both sides of the second liquid nitrogen pool 503, and the second upright columns 502 are located between adjacent two first upright columns 501, the second upright columns 502 are slidably connected to the supporting columns 504, the first upright columns 501 and the second upright columns 502 are hingedly connected with a plurality of triangular blocks 505 for carrying the piece shuttle 1 from top to bottom, and the three-axis moving suction disc 3 is further used for sucking the piece shuttle 1 to move back and forth on the synchronous belt 4 and the triangular blocks 505.

[0074] The triangular block is installed on the surface of the column and is fixed on the column through a rotating shaft. The triangular block keeps outward convex and can rotate into the interior of the column around the rotating shaft after being stressed. The triangular block is used for bearing a series of flake shuttles. The flake shuttles are continuously lifted upward through the up-and-down movement of the column. The uppermost flake shuttle is taken away by the three-axis moving suction cup, and the next upper flake shuttle is lifted to the uppermost position to wait for being taken away. The flake shuttle is placed on the triangular block. The column moves downward by a distance first, so that the dewar container with a superconductor below the flake shuttle is immersed into the liquid nitrogen pool. The dewar container is provided with a material capable of adsorbing liquid nitrogen. After the superconductor is cooled to the required temperature by absorbing sufficient liquid nitrogen, the column moves upward again, and the flake shuttle is lifted to the specified position. At this time, all the flake shuttles are lifted upward.

Claims

1. A wide-width rapier loom with controllable weft insertion speed, characterized in that, The device includes a shuttle (1), a weft insertion track (2), and a three-axis moving suction cup (3). The weft insertion track (2) includes a permanent magnet array track (201) and an electromagnetic coil array track (202). The electromagnetic coil array track (202) is arranged on both sides of the permanent magnet array track (201). The three-axis moving suction cup (3) is arranged at both ends of the weft insertion track (2). A synchronous belt (4) is arranged between the three-axis moving suction cups (3). The three-axis moving suction cup (3) is used to pick up the shuttle (1) and move it back and forth on the weft insertion track (2) and the synchronous belt (4). The shuttle (1) includes a shuttle body (101) and a Dewar container (102). The shuttle body (101) is symmetrically mounted on both sides. A permanent magnet array (103) interacts with the electromagnetic coil array track (202) to realize the weft insertion movement of the shuttle (1). The shuttle body (101) is equipped with a weft clamp (104) for clamping the weft thread (6). The bottom of the shuttle body (101) is connected to the top of the Dewar container (102). The Dewar container (102) is filled with liquid nitrogen. A superconductor (105) that interacts with the permanent magnet array track (201) to realize the suspension of the shuttle (1) is inserted at the bottom of the Dewar container (102). The superconductor (105) is in contact with the liquid nitrogen. The Dewar container (102) has a through hole (106) for injecting liquid nitrogen and discharging liquid nitrogen vapor.

2. A wide-width rapier loom with controllable weft insertion speed according to claim 1, characterized in that: The coils on the electromagnetic coil array track (202) are grouped in groups of three, with each group carrying a three-phase alternating current, and each coil carrying an alternating current with a phase difference of 120 degrees.

3. A wide-width rapier loom with controllable weft insertion speed according to claim 1, characterized in that: The shuttle body (101) includes a shuttle body (107) and a shuttle head (108). The shuttle body (107) includes an upper shuttle body (111) and a lower shuttle body (112) arranged symmetrically. A first through groove (113) is formed in the middle of the lower end face of the upper shuttle body (111) along its length direction. A second through groove (114) is formed in the middle of the upper end face of the lower shuttle body (112) along its length direction. The second through groove (114) and the first through groove (113) form a through cavity (1). 09), the weft clamp (104) is installed in the through cavity (109), the gap between the two sides of the upper shuttle body (111) and the two sides of the lower shuttle body (112) forms the first mounting groove (110), the permanent magnet array (103) is installed in the first mounting groove (110), the shuttle head (108) is inserted into one end of the through cavity (109), and the other end of the through cavity (109) is used for the weft thread (6) to pass through and be clamped by the weft clamp (104).

4. A wide-width rapier loom with controllable weft insertion speed according to claim 3, characterized in that: An upper mounting groove (115) is provided on the lower end face of the upper shuttle body (111) on both sides of the first through groove (113), and a lower mounting groove (116) is provided on the upper end face of the lower shuttle body (112) on both sides of the second through groove (114). The lower mounting groove (116) and the upper mounting groove (115) together form a second mounting groove (117), and a magnetic shielding block (118) is installed in the second mounting groove (117).

5. A wide-width rapier loom with controllable weft insertion speed according to claim 3, characterized in that: The upper end face of the upper shuttle body (111) and the lower end face of the lower shuttle body (112) are provided with rivet holes (119), and the upper shuttle body (111), the lower shuttle body (112) and the weft clamp (104) are connected to each other through the rivet holes (119).

6. A wide-width rapier loom with controllable weft insertion speed according to claim 3, characterized in that: The upper end face of the upper shuttle body (111) and the lower end face of the lower shuttle body (112) are both provided with round holes (120), which are used to insert the conical rod that opens the weft clamp (104).

7. A wide-width rapier loom with controllable weft insertion speed according to any one of claims 1-6, characterized in that: The Dewar container (102) includes a Dewar top cover (121) and a Dewar container body (122). The lower end face of the Dewar top cover (121) is provided with a blind hole, and the lower end face of the Dewar container body (122) is provided with a mounting through hole. The mounting through hole includes a first mounting hole and a second mounting hole (123) that are connected. The diameter of the first mounting hole is larger than the diameter of the second mounting hole (123). The superconductor (105) has a cylindrical structure. One end of the superconductor (105) is installed in the blind hole, and the other end of the superconductor (105) is installed in the first mounting hole. The through hole (106) is provided on the side wall of the Dewar container body (122).

8. A wide-width rapier loom with controllable weft insertion speed according to claim 1, characterized in that: The synchronization belt (4) includes a first synchronization belt (401) and a second synchronization belt (402). The first synchronization belt (401) is located above and to the side of the second synchronization belt (402). A connecting plate (403) is provided between the first synchronization belt (401) and the second synchronization belt (402). A first liquid nitrogen pool (404) matching the Dewar container (102) is provided in the middle of the second synchronization belt (402).

9. A wide-width rapier loom with controllable weft insertion speed according to claim 1, characterized in that: The wide-width shuttle loom also includes a cooling device (5), which is located at the end of the synchronous belt (4). The cooling device (5) includes multiple first-position columns (501), multiple second-position columns (502), and a second liquid nitrogen tank (503) that matches the superconductor (105). The multiple first-position columns (501) are symmetrically distributed on both sides of the second liquid nitrogen tank (503), and the multiple second-position columns (502) are symmetrically distributed on both sides of the second liquid nitrogen tank (503). The second column (502) is located between two adjacent first columns (501) and is slidably connected to the support column (504). Multiple triangular blocks (505) for carrying the shuttle (1) are hinged from top to bottom on the first column (501) and the second column (502). The three-axis moving suction cup (3) is also used to pick up the shuttle (1) and move it back and forth on the synchronous belt (4) and the triangular blocks (505).

10. A control method for a wide-width rapier loom with controllable weft insertion speed as described in claim 1, characterized in that, The control method includes the following steps: First, the shuttle (1) is picked up by the three-axis moving suction cup (3) at the head end, and the shuttle (1) is moved to the head end of the weft insertion track (2). At this time, the superconductor (105) is in a static suspended state under the action of the permanent magnet array track (201). Then, the electromagnetic coil array track (202) is controlled to pass current to generate a traveling wave magnetic field. The traveling wave magnetic field interacts with the permanent magnet array (103) on both sides of the shuttle (1) to provide driving force for the shuttle (1) and pull the shuttle (1) forward. When the shuttle (1) moves to the head end of the weft insertion track (2) and the current opposite to that before is passed through the electromagnetic coil array track (202), the electromagnetic coil... The interaction between the array track (202) and the permanent magnet array (103) on both sides of the shuttle (1) provides braking force to the shuttle (1), which decelerates until it comes to a stop. Then, the shuttle (1) is picked up by the three-axis moving chuck (3) at the end and placed on the synchronous belt (4). The synchronous belt (4) transports the shuttle (1) to the three-axis moving chuck (3) at the beginning. During the transport process, liquid nitrogen is injected into the Dewar container (102) through the through hole (106) to cool the superconductor (105). Finally, the shuttle (1) is moved to the top of the weft insertion track (2) by the three-axis moving chuck (3) at the beginning for the next weft insertion.

Images