A take-up and undo device for preparing continuous SiC fibers
By employing servo motor-driven synchronous rotation and tension control in the CVD-process SiC fiber take-up and untake-up device, the problem of uneven SiC fiber growth was solved, achieving uniform deposition and high-quality production of SiC fibers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INST OF METAL RESEARCH - CHINESE ACAD OF SCI
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-26
Smart Images
Figure CN224280449U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CVD preparation of continuous SiC fibers, specifically to a fiber winding and unwinding device for preparing continuous SiC fibers. Background Technology
[0002] With the rapid development of the aviation and aerospace industries, the service conditions of various equipment are becoming increasingly stringent, thus placing higher and more numerous demands on materials, which are difficult to meet with a single material system. Continuous monofilament SiC fiber is a high-tech product with advantages such as high specific strength, high specific modulus, corrosion resistance, wear resistance, and good thermal stability, and is used to reinforce various matrices such as resins, metals, and ceramics. Currently, SiC fiber is used as a reinforcing phase to prepare various composite material structural components such as magnesium-based composite satellite exploration platforms, titanium-based composite integral blade rings, low-pressure turbine shafts, and fiber-reinforced silicon carbide fairings. It is an important class of high-tech structural materials with clear application prospects in the aerospace industry.
[0003] Continuous, large-diameter monofilament SiC fibers are prepared using chemical vapor deposition (CVD), where reactant gases are pyrolyzed and deposited onto the surface of a hot filament to generate SiC. The raw materials used in SiC fiber preparation are methyltrichlorosilane, with hydrogen as the carrier gas and argon as the protective gas. These three gases are mixed and introduced into a quartz reactor. Due to the uneven radial distribution of the gases within the reaction tube, especially at the inlet, significant differences in gas concentration lead to uneven temperature distribution in the radial direction. Furthermore, in traditional CVD equipment for SiC fiber preparation, the core material moves from top to bottom and cannot rotate circumferentially. The combination of these two factors can result in uneven growth of the SiC fibers. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a take-up and untake-up device for preparing continuous SiC fibers. By simultaneously taking up the fibers and rotating the core material during the SiC fiber deposition process, the problem of uneven SiC fiber growth is solved, and the distribution of SiC phase in the fiber is ensured to be more balanced.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A take-up and untake-up device for preparing continuous SiC fibers is characterized in that it consists of three parts: an upper take-up device, a lower take-up device, and a controller. The controller is connected to the drive motor of the upper servo motor of the upper take-up device, the lower servo motor of the lower take-up device, and the drive motor of the winding machine via cables.
[0007] The upper feeding device includes an upper servo motor, an upper servo motor support frame, a feeding wheel bracket, and a feeding wheel. The upper servo motor is fixed on the upper servo motor bracket. The upper end of the feeding wheel bracket is coaxially connected to the central shaft of the upper servo motor through a connector. The lower end of the feeding wheel bracket is connected to the feeding wheel fixing groove. The feeding wheel is installed in the feeding wheel fixing groove through the central shaft.
[0008] The lower take-up device includes a winding machine, a take-up wheel, a lower servo motor, a winding machine bracket, and a support platform. The take-up wheel is mounted on the winding machine via a central shaft. One side of the bottom of the winding machine is fixed to the central shaft at one end of the lower servo motor, and the other side of the bottom of the winding machine is fixed to the winding machine bracket. The lower servo motor is fixed to the support platform. A winding machine roller is installed at the lower end of the winding machine bracket, and the winding machine bracket contacts the support platform through the winding machine roller.
[0009] The aforementioned take-up and unwinding device for preparing continuous SiC fibers has an unwinding wheel support that is a three-section rod-shaped structure integrally formed by two right-angle bends, specifically including: a first vertical section, a horizontal section, and a second vertical section; wherein, the upper part of the first vertical section is provided with an M5 threaded hole, and the first vertical section is fixed to the connector through the M5 threaded hole; the end of the first vertical section is bent at a right angle along the horizontal direction to form a horizontal section; the end of the horizontal section is bent at a right angle downward to form a second vertical section; the lower end of the second vertical section is fixed to the unwinding wheel fixing groove; one side of the unwinding wheel fixing groove is provided with an M3 threaded hole, and an M3 screw extends through the M3 threaded hole to the tension controller, so that the tension controller is fixed inside the unwinding wheel fixing groove; the tension controller contacts the continuous yarn through a sensor.
[0010] The aforementioned take-up and unwinding device for preparing continuous SiC fibers has a horizontal section with a length L1 equal to the radius of the unwinding wheel, and a second vertical section with a length L2 greater than the radius of the unwinding wheel.
[0011] The aforementioned take-up and feed device for preparing continuous SiC fibers has a connecting member that is a vertical cylinder with a stepped hole of smaller diameter at the top and larger diameter at the bottom along its axial direction. One end of the connecting member has a keyway communicating with the smaller diameter portion of the stepped hole, and the other end of the connecting member has an M5 threaded hole communicating perpendicularly with the larger diameter portion of the stepped hole. The central shaft of the upper servo motor is inserted into the smaller diameter portion of the stepped hole and connected by a keyway. The first vertical section of the feed wheel bracket is inserted into the larger diameter portion of the stepped hole. The M5 threaded hole of the first vertical section corresponds to the M5 threaded hole of the connecting member and is connected by a standard M5 screw, thereby achieving a rigid connection between the upper end of the feed wheel bracket and the central shaft of the upper servo motor through the connecting member.
[0012] The aforementioned take-up and untake-up device for preparing continuous SiC fibers has a horizontal distance L3 between the central axis of the lower servo motor and the center of the take-up wheel, which is equal to the radius of the take-up wheel.
[0013] The aforementioned take-up and unwrap device for preparing continuous SiC fibers has two winding machine supports, and each winding machine support has a winding machine roller installed at its lower end.
[0014] The aforementioned take-up and untake-up device for preparing continuous SiC fibers uses a controller to control the upper and lower servo motors to rotate simultaneously and at the same speed along a horizontal plane, thereby driving the continuous filament to rotate.
[0015] The aforementioned take-up and unwinding device for preparing continuous SiC fibers has a controller that controls the take-up wheel of the winding machine to drive the unwinding wheel to rotate clockwise from top to bottom.
[0016] The aforementioned take-up and take-up device for preparing continuous SiC fibers uses continuous filaments or bundles. The upper take-up device's take-up wheel and the lower take-up device's take-up wheel are arranged opposite each other. In the initial state, the continuous filament is wound on the take-up wheel, and one end of the continuous filament is connected to the take-up wheel. The take-up wheel and the take-up wheel rotate synchronously around their respective central axes.
[0017] This utility model has the following advantages and beneficial effects:
[0018] 1. This utility model has a reasonable structure. The feeding wheel and the take-up wheel rotate coaxially along the yarn in the horizontal direction. By adjusting the speed of the tension controller and the winding machine, it is ensured that the yarn does not swing in the horizontal direction, thereby improving the uniformity of SiC fiber growth and solving the problem of uneven SiC fiber growth in the prior art.
[0019] 2. The present invention features uniform rotation of the filament to ensure that the SiC matrix is uniformly deposited on the filament surface. The filament feeding wheel fixing groove is combined with the tension controller to prevent fiber breakage.
[0020] 3. The winding machine of this utility model adopts a servo motor and two sets of winding machine brackets for scattered support, which ensures the smooth rotation of the winding machine and reduces the interference of vibration on the deposition process. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of the wire take-up and unwinding device of this utility model.
[0022] Figure 2 This is a schematic diagram of the wire feeding wheel support.
[0023] Figure 3 This is a structural schematic diagram of the connector.
[0024] Reference numerals in the attached drawings: 1-Upper servo motor, 2-Upper servo motor support frame, 3-Feeding wheel bracket, 4-Feeding wheel, 5-Tension controller, 6-Continuous yarn, 7-Winding machine, 8-Take-up wheel, 9-Lower servo motor, 10-Winding machine bracket, 11-Winding machine roller, 12-Support platform, 13-Controller, 14-Connector, 15-M5 threaded hole, 16-Feeding wheel fixing groove, 17-M3 threaded hole, 18-Keyway, 19-M5 threaded hole, 20-Stepped hole, 21-First vertical section, 22-Horizontal section, 23-Second vertical section. Detailed Implementation
[0025] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and embodiments.
[0026] Please see Figures 1-3 This utility model provides a take-up and untake-up device for preparing continuous SiC fibers, which consists of three parts: an upper take-up device, a lower take-up device, and a controller. The controller 13 is connected to the drive motor of the upper servo motor 1 of the upper take-up device, the lower servo motor 9 of the lower take-up device, and the drive motor of the winding machine 7 via cables. The upper take-up device, the lower take-up device, and the controller work together through mechanical structure and electrical control to achieve synchronous rotation and continuous take-up and untake-up of the core material, ensuring that the SiC fibers grow circumferentially uniformly during chemical vapor deposition (CVD).
[0027] The upper feeding device includes an upper servo motor 1, an upper servo motor support frame 2, a feeding wheel bracket 3, and a feeding wheel 4. The upper servo motor 1 is fixed on the upper servo motor support frame 2. The upper end of the feeding wheel bracket 3 is coaxially connected to the central shaft of the upper servo motor 1 through a connector 14. The lower end of the feeding wheel bracket 3 is connected to the feeding wheel fixing groove 16. The feeding wheel 4 is installed in the feeding wheel fixing groove 16 through the central shaft.
[0028] like Figure 2As shown, the feed roller bracket 3 is a three-section rod-shaped structure integrally formed by two right-angle bends, specifically including: a first vertical section 21, a horizontal section 22, and a second vertical section 23. The upper part of the first vertical section 21 has an M5 threaded hole 15, through which the first vertical section 21 is fixed to the connector 14. The end of the first vertical section 21 is bent at a right angle in the horizontal direction to form the horizontal section 22. The end of the horizontal section 22 is bent downwards at a right angle to form the second vertical section 23. The lower end of the second vertical section 23 is fixed to the feed roller fixing groove 16. One side of the feed roller fixing groove 16 has an M3 threaded hole 17, through which an M3 screw extends to the tension controller 5, ensuring that the tension controller 5 is fixed inside the feed roller fixing groove 16. The tension controller 5 contacts the continuous yarn 6 through a sensor. The length L1 of the horizontal section 22 is equal to the radius of the feed roller 4, and the length L2 of the second vertical section 23 is greater than the radius of the feed roller 4.
[0029] like Figure 3 As shown, the connector 14 is a vertical cylinder with a stepped hole 20 of smaller diameter at the top and larger diameter at the bottom along the axial direction. One end of the connector 14 has a keyway 18 that communicates with the smaller diameter part of the stepped hole 20, and the other end of the connector 14 has an M5 threaded hole 19 that communicates perpendicularly with the larger diameter part of the stepped hole 20. The central shaft of the upper servo motor 1 is inserted into the smaller diameter part of the stepped hole 20 and is keyed through the keyway 18. The first vertical section 21 of the wire feeding wheel bracket 3 is inserted into the larger diameter part of the stepped hole 20. The M5 threaded hole 15 of the first vertical section 21 corresponds to the M5 threaded hole 19 of the connector 14 and is connected through a standard M5 screw, so that the upper end of the wire feeding wheel bracket 3 is rigidly connected to the central shaft of the upper servo motor 1 through the connector 14.
[0030] The lower take-up device includes a winding machine 7, a take-up roller 8, a lower servo motor 9, a winding machine bracket 10, and a support platform 12. The take-up roller 8 is mounted on the winding machine 7 via a central shaft. One side of the bottom of the winding machine 7 is fixed to the central shaft at one end of the lower servo motor 9, and the other side of the bottom of the winding machine 7 is fixed to the winding machine bracket 10. The lower servo motor 9 is fixed to the support platform 12. A winding machine roller 11 is installed at the lower end of the winding machine bracket 10, and the winding machine bracket 10 contacts the support platform 12 through the winding machine roller 11. There are two winding machine brackets 10, and each winding machine bracket 10 has a winding machine roller 11 installed at its lower end to ensure stable rotation of the winding machine 7. The horizontal distance L3 between the central shaft of the lower servo motor 9 and the center of the take-up roller 8 is equal to the radius of the take-up roller 8.
[0031] Controller 13 controls the upper servo motor 1 and the lower servo motor 9 to rotate simultaneously and at the same speed along the horizontal plane, with the speeds of the upper servo motor 1 and the lower servo motor 9 ranging from 1 rpm / min to 20 rpm / min. Additionally, controller 13 also controls the take-up wheel 8 of the winding machine 7 to rotate clockwise, with the take-up speed of the winding machine 7 being 20 m / h. -1 ~200m·h -1 The controller 13 enables the winding machine 7 in the lower winding device to drive the unwinding wheel 4 to rotate clockwise from top to bottom using the continuous wire 6. At the same time, it controls the upper servo motor 1 and the lower servo motor 9 to drive the continuous wire 6 to rotate from left to right. The two actions can both wind up the wire and ensure that the wire rotates at a uniform speed in the reactor.
[0032] The continuous wire 6 is a continuous monofilament or bundle of wire, and its material includes, but is not limited to, tungsten wire. The feeding wheel 4 of the upper feeding device and the taking-up wheel 8 of the lower taking-up device are arranged opposite each other. In the initial state, the continuous wire 6 is wound on the feeding wheel 4, and one end of the continuous wire 6 is connected to the taking-up wheel 8. The feeding wheel 4 and the taking-up wheel 8 rotate synchronously around their respective central axes, and cooperate with the rotation of the winding machine 7 to complete the taking-up work.
[0033] like Figures 1-3 As shown, the working process of this utility model is as follows:
[0034] (1) Thread installation
[0035] The continuous filament 6 to be processed (such as tungsten wire, continuous monofilament, or filament bundle) is mounted onto the feed roller 4, ensuring that the continuous filament 6 is evenly wound on the feed roller 4. The rotation speeds of the upper servo motor 1 and the lower servo motor 9 are set by the controller 13, allowing them to rotate synchronously within the range of 1 rpm / min to 20 rpm / min; simultaneously, the take-up speed of the winding machine 7 is set, making it adjustable within the range of 20 m / h to 200 m / h. The tension of the continuous filament 6 is adjusted by the tension controller 5 to ensure that the continuous filament 6 maintains appropriate tension during unfolding and winding, preventing the filament from breaking or loosening.
[0036] (2) Unfolding the silk thread
[0037] When the upper servo motor 1 is started, the controller 13 issues a command to start the upper servo motor 1, causing it to rotate at the set speed. The rotation of the upper servo motor 1 drives the feeding wheel 4 to rotate through the feeding wheel bracket 3, and the continuous yarn 6 is smoothly unwound from the feeding wheel 4. The tension controller 5 monitors the tension of the continuous yarn 6 in real time, and by adjusting the parameters of the tension controller 5, ensures that the continuous yarn 6 maintains appropriate tension throughout the unwinding process.
[0038] (3) Chemical vapor deposition (CVD)
[0039] The continuous filament 6 enters the chemical vapor deposition reaction zone, where the reactive gases decompose at high temperature and deposit on the filament surface to form a SiC layer. Because the filament rotates horizontally during unfolding via the upper servo motor 1, the reactive gases can be uniformly deposited on the filament surface, thus ensuring uniform growth of the SiC fibers.
[0040] (4) Fiber winding
[0041] The lower servo motor 9 is started. After the continuous filament 6 completes the CVD treatment, the controller 13 issues a command to start the lower servo motor 9, causing it to rotate at the set speed. The rotation of the lower servo motor 9 drives the take-up wheel 8 through the winding machine 7, and the CVD-treated SiC fibers are evenly wound onto the take-up wheel 8. The controller 13 adjusts the take-up speed of the winding machine 7 as needed to ensure that the fibers do not break due to excessive speed or accumulate due to insufficient speed during the winding process. When the fiber winding is complete, the controller 13 issues a command to stop the rotation of the upper servo motor 1 and the lower servo motor 9, unloading the wound SiC fibers from the take-up wheel 8 for subsequent processing or storage.
[0042] The results show that the yarn winding and unwinding device of this invention achieves smooth yarn unfolding and uniform winding through the synchronous rotation of the upper and lower servo motors and the precise control of the motor speed and winding speed by the controller. Simultaneously, the real-time adjustment of the yarn tension by the tension controller further improves the quality and uniformity of the fibers. This collaborative working method effectively solves the problem of uneven SiC fiber growth in traditional devices, improving fiber performance and quality.
Claims
1. A take-up and untake-up device for preparing continuous SiC fibers, characterized in that, It consists of three parts: an upper wire feeding device, a lower wire taking-up device, and a controller. The controller is connected to the drive motor of the upper servo motor of the upper wire feeding device, the lower servo motor of the lower wire taking-up device, and the drive motor of the winding machine via cables. The upper feeding device includes an upper servo motor, an upper servo motor support frame, a feeding wheel bracket, and a feeding wheel. The upper servo motor is fixed on the upper servo motor bracket. The upper end of the feeding wheel bracket is coaxially connected to the central shaft of the upper servo motor through a connector. The lower end of the feeding wheel bracket is connected to the feeding wheel fixing groove. The feeding wheel is installed in the feeding wheel fixing groove through the central shaft. The lower take-up device includes a winding machine, a take-up wheel, a lower servo motor, a winding machine bracket, and a support platform. The take-up wheel is mounted on the winding machine via a central shaft. One side of the bottom of the winding machine is fixed to the central shaft at one end of the lower servo motor, and the other side of the bottom of the winding machine is fixed to the winding machine bracket. The lower servo motor is fixed to the support platform. A winding machine roller is installed at the lower end of the winding machine bracket, and the winding machine bracket contacts the support platform through the winding machine roller.
2. The take-up and untake-up device for preparing continuous SiC fibers according to claim 1, characterized in that, The feed roller bracket is a three-section rod-shaped structure integrally formed by two right-angle bends, specifically including: a first vertical section, a horizontal section, and a second vertical section. The upper part of the first vertical section is provided with an M5 threaded hole, and the first vertical section is fixed to the connector through the M5 threaded hole. The end of the first vertical section is bent at a right angle in the horizontal direction to form a horizontal section. The end of the horizontal section is bent at a right angle downward to form a second vertical section. The lower end of the second vertical section is fixed to the feed roller fixing groove. One side of the feed roller fixing groove is provided with an M3 threaded hole. An M3 screw extends through the M3 threaded hole to the tension controller, so that the tension controller is fixed inside the feed roller fixing groove. The tension controller contacts the continuous yarn through a sensor.
3. The take-up and untake-up device for preparing continuous SiC fibers according to claim 1, characterized in that, The length L1 of the horizontal section is equal to the radius of the feeding wheel, and the length L2 of the second vertical section is greater than the radius of the feeding wheel.
4. The take-up and untake-up device for preparing continuous SiC fibers according to claim 1, characterized in that, The connector is a vertical cylinder with a stepped hole of smaller diameter at the top and larger diameter at the bottom along the axial direction. One end of the connector has a keyway that communicates with the smaller diameter part of the stepped hole, and the other end of the connector has an M5 threaded hole that communicates perpendicularly with the larger diameter part of the stepped hole. The central shaft of the upper servo motor is inserted into the smaller diameter part of the stepped hole and is keyed through the keyway. The first vertical section of the wire feeding wheel bracket is inserted into the larger diameter part of the stepped hole. The M5 threaded hole of the first vertical section corresponds to the M5 threaded hole of the connector and is connected through a standard M5 screw, so as to realize the rigid connection between the upper end of the wire feeding wheel bracket and the central shaft of the upper servo motor through the connector.
5. The take-up and untake-up device for preparing continuous SiC fibers according to claim 1, characterized in that, The horizontal distance L3 between the center axis of the lower servo motor and the center of the take-up wheel is equal to the radius of the take-up wheel.
6. The take-up and untake-up device for preparing continuous SiC fibers according to claim 1, characterized in that, There are two winding machine brackets, and each winding machine bracket is equipped with a winding machine roller at its lower end.
7. The take-up and untake-up device for preparing continuous SiC fibers according to claim 1, characterized in that, The controller controls the upper and lower servo motors to rotate simultaneously and at the same speed along the horizontal plane, driving the continuous wire to rotate.
8. The take-up and untake-up device for preparing continuous SiC fibers according to claim 1, characterized in that, The controller controls the take-up wheel of the winding machine to drive the unwinding wheel to rotate clockwise from top to bottom.
9. The take-up and untake-up device for preparing continuous SiC fibers according to claim 1, characterized in that, The continuous yarn is a continuous monofilament or yarn bundle. The feeding wheel of the upper feeding device and the take-up wheel of the lower take-up device are set up opposite each other. In the initial state, the continuous yarn is wound on the feeding wheel and one end of the continuous yarn is connected to the take-up wheel. The feeding wheel and the take-up wheel rotate synchronously around their respective central axes.