Silicon carbide fiber spinning device
By designing a silicon carbide fiber spinning device with thermally conductive oil heating and gradient runner structure, the problem of insufficient temperature differences and impurity filtration capacity of the spinning device is solved, and the spinning quality and consistency are improved.
Patent Information
- Application Number
- CN202420181123.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-25
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-25
AI Technical Summary
The consistency of the residence time of the silicon carbide fiber spinning device in the spinning device, the temperature difference inside and outside the spray hole area, the spinning bubble breaking ability and the impurity filtration ability are highly required, and the prior art is difficult to meet.
A device including a spinning box and a spinning assembly is designed. The outer wall of the spinning assembly is heated by thermal oil. The assembly consists of a metering pump, a distribution plate, a spinneret, a cavity, a melt distributor and a pressure sensor. The body flow channel consists of an involute, arc diffusion and horn-type transition channel, equipped with a temperature detector and a heater, and the filter is used for impurity filtration.
The consistency of melt residence time, temperature differences inside and outside the spray hole area, bubble breaking ability and impurity filtration ability of the spinning assembly are significantly improved, ensuring the consistency of melt flow performance and spinning quality.
Smart Images
Figure CN222139358U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to silicon carbide chemical fiber spinning equipment, in particular to a silicon carbide fiber spinning device. Background Art
[0002] Silicon carbide fiber is an important inorganic fiber with the characteristics of high temperature resistance, oxidation resistance, high modulus, high thermal conductivity and good chemical stability. It is mainly used as thermal protection material, high-efficiency heat dissipation material, friction composite material, metal matrix, ceramic matrix composite material reinforcement material, etc. In recent years, silicon carbide fiber has shown broad application prospects in the fields of aviation, aerospace and atomic energy.
[0003] Compared with the melt spinning of ordinary chemical fibers, silicon carbide fibers have higher requirements on the consistency of residence time in the spinning device, the temperature difference between the inside and outside of the nozzle area, the spinning bubble breaking ability and the impurity filtering ability. Summary of the invention
[0004] The purpose of the utility model is to: aim at the problems in the related technology, the utility model proposes a silicon carbide fiber spinning device to overcome the above technical problems existing in the existing related technology.
[0005] The technical solution of the utility model includes a spinning box and a spinning assembly, wherein the spinning assembly is installed in the spinning box, and is characterized in that the outer wall of the spinning assembly is heated by heat-conducting oil, and the spinning assembly is composed of a metering pump, a distribution plate, a spinneret, a cavity, a melt distributor and a pressure sensor, wherein the cavity is an inverted cup shape and is provided with a melt inlet channel, and the metering pump and the pressure sensor are installed on the melt inlet channel; the melt distributor is embedded in the inner cavity of the cavity, and a melt flow channel is formed by a gap between the two, and the melt flow channel is composed of a first section involute distribution flow channel, a middle section arc diffusion flow channel, and a final section trumpet-shaped transition flow channel; the radial cross-sectional area of the first section involute distribution flow channel is consistent and is connected to the melt inlet channel; the distribution plate and the spinneret are arranged from top to bottom below the melt distributor, and the spray hole areas of the two are directly opposite to the final section trumpet-shaped transition flow channel. Since the first section of the involute distribution channel is involute and has a consistent radial cross-sectional area, it can ensure that the conveying pressure is not significantly lost when conveying the melt, and the melt can be evenly distributed to the middle arc diffusion channel at a consistent flow rate under the premise of ensuring that the melt is fully extruded and fused; secondly, there will be no sudden change in the flow channel area at the junction of the first section of the involute distribution channel and the middle section of the arc diffusion channel; in addition, the last section of the trumpet-shaped transition channel is also a gradual structure, so that there is no sudden change in the cross-sectional area of the entire melt flow channel. The heat transfer oil can keep the spinning assembly warm, and the pressure sensor can monitor the pressure of the melt in real time, thereby controlling the speed of the metering pump to ensure the spinning pressure.
[0006] Preferably, the upper surface of the melt distributor is provided with orange segment protrusions distributed in a ring shape, and the first section of the involute distribution channel is the gap between the orange segment protrusions.
[0007] Preferably, the first temperature detector, the second temperature detector and the heater are also included, the distribution plate and the spinneret are both hollow plates, the heater is embedded in the middle of the distribution plate and the spinneret, the first temperature detector is arranged on the inner side of the melt flow channel, and the second temperature detector is arranged on the outer side of the melt flow channel. According to the spinning process requirements, the temperature inside and outside the melt flow channel can be measured, and then the temperature of the heat transfer oil and the power of the heater can be adjusted, which can significantly reduce the temperature difference between the inner and outer sides of the distribution plate and the spinneret nozzle area, so that the viscosity of the melt is maintained stable, and the consistency of the melt flow performance is ensured.
[0008] Preferably, a filter screen is further included, which is arranged at the end of the final trumpet-shaped transition channel and between the distribution plate and the spinneret to filter impurities contained in the melt and has a bubble breaking function.
[0009] The beneficial effects of the utility model are as follows: compared with the traditional spinning device, the consistency of the melt residence time, the temperature difference between the inner and outer sides of the distribution plate and the spinneret nozzle area, and the bubble breaking ability and impurity filtering ability of the spinning component are better. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0011] Figure 1 : The front view of the utility model;
[0012] Figure 2 : Attached view of the utility model;
[0013] Figure 3 : Schematic diagram of the melt distributor structure;
[0014] In the figure: 1. Spinning box, 2. Heat transfer oil, 3. Metering pump, 4. First temperature detector, 5. Second temperature detector, 6. Distribution plate, 7. Spinneret, 8. Heater, 9. Filter, 10. Cavity, 11. Melt distributor, 12. Pressure sensor. DETAILED DESCRIPTION
[0015] like Figures 1 to 3As shown, the utility model includes a spinning box 1 and a spinning assembly, the spinning assembly is installed in the spinning box 1, and its outer wall is heated by a heat transfer oil 2. The spinning assembly is composed of a metering pump 3, a first temperature detector 4, a second temperature detector 5, a distribution plate 6, a spinneret 7, a heater 8, a filter screen 9, a cavity 10, a melt distributor 11 and a pressure sensor 12. The cavity 10 is an inverted cup shape and is provided with a melt inlet channel. The metering pump 3 and the pressure sensor 12 are installed on the melt inlet channel; the melt distributor 11 is embedded in the inner cavity of the cavity 10, and the gap between the two forms a melt flow channel, and the melt flow channel is composed of a first section of an involute distribution flow channel, a middle section of an arc diffusion flow channel, The final trumpet-shaped transition flow channel is composed of; the first-section involute distribution flow channel is the gap between the annularly distributed orange-segment protrusions on the upper surface of the melt distribution body 11, and its radial cross-sectional area is consistent and connected with the melt inlet channel; the distribution plate 6 and the spinneret 7 are arranged from top to bottom below the melt distribution body 11, and the spray hole areas of the two are opposite to the final trumpet-shaped transition flow channel; the distribution plate 6 and the spinneret 7 are both hollow plates, the heater 8 is embedded in the middle of the distribution plate 6 and the spinneret 7, the first temperature detector 4 is arranged on the inner side of the melt flow channel, and the second temperature detector 5 is arranged on the outer side of the melt flow channel; the filter screen 9 is arranged at the end of the final trumpet-shaped transition flow channel and between the distribution plate 6 and the spinneret 7.
[0016] The first section of the involute distribution channel is involute type and has the same radial cross-sectional area. It can ensure that the conveying pressure is not obviously lost when conveying the melt, and the melt can be evenly distributed to the middle arc diffusion channel at a consistent flow rate under the premise of ensuring that the melt is fully extruded and fused; secondly, there will be no sudden change in the flow channel area at the junction of the first section of the involute distribution channel and the middle section of the arc diffusion channel; in addition, the last section of the trumpet-shaped transition channel is also a gradual structure, so that there is no sudden change in the cross-sectional area of the entire melt flow channel. During operation, the pressure sensor 12 can monitor the pressure of the melt in real time, thereby controlling the speed of the metering pump 3 to ensure the spinning pressure. According to the spinning process requirements, the temperature inside and outside the melt flow channel can be measured, and then the temperature of the heat transfer oil 2 and the power of the heater 8 can be adjusted, which can significantly reduce the temperature difference between the inside and outside of the distribution plate 6 and the spinneret 7 spray hole area, so that the viscosity of the melt is maintained stable and the consistency of the melt flow performance is ensured. The filter 9 can filter the impurities contained in the melt and has a bubble breaking function. The beneficial effects of the utility model are as follows: compared with the traditional spinning device, the consistency of the melt residence time, the temperature difference between the inner and outer sides of the distribution plate 6 and the spinneret 7 nozzle area, and the bubble breaking ability and impurity filtering ability of the spinning component are better.
[0017] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A silicon carbide fiber spinning device, comprising a spinning manifold (1) and a spinning assembly, wherein the spinning assembly is installed in the spinning manifold (1), characterized in that The outer wall of the spinning assembly is heated by heat transfer oil (2). The spinning assembly is composed of a metering pump (3), a distribution plate (6), a spinneret (7), a cavity (10), a melt distributor (11) and a pressure sensor (12). The cavity (10) is an inverted cup shape and is provided with a melt inlet channel. The metering pump (3) and the pressure sensor (12) are installed on the melt inlet channel. The melt distributor (11) is embedded in the inner cavity of the cavity (10). The gap between the two forms a melt flow channel. The melt flow channel is composed of a first section involute distribution flow channel, a middle section arc diffusion flow channel and a final section trumpet transition flow channel. The radial cross-sectional area of the first section involute distribution flow channel is consistent and is connected to the melt inlet channel. The distribution plate (6) and the spinneret (7) are arranged from top to bottom below the melt distributor (11), and the spray hole areas of the two face the final section trumpet transition flow channel.
2. A silicon carbide fiber spinning device according to claim 1, characterized in that The upper surface of the melt distributor (11) is provided with orange segment protrusions distributed in an annular manner, and the first section of the involute distribution flow channel is the gap between the orange segment protrusions.
3. A silicon carbide fiber spinning device according to claim 1 or 2, characterized in that It also includes a first temperature detector (4), a second temperature detector (5) and a heater (8); the distribution plate (6) and the spinneret (7) are both hollow plates; the heater (8) is embedded in the middle of the distribution plate (6) and the spinneret (7); the first temperature detector (4) is arranged on the inner side of the melt flow channel; and the second temperature detector (5) is arranged on the outer side of the melt flow channel.
4. A silicon carbide fiber spinning device according to claim 1 or 2, characterized in that It also comprises a filter screen (9), wherein the filter screen (9) is arranged at the end of the final trumpet-shaped transition channel and between the distribution plate (6) and the spinneret (7).