44results about How to "Improve temperature field uniformity" patented technology

The invention discloses a method for producing trichlorosilane from silicon tetrachloride through plasma hydrogenation. The method is characterized in that through induction of a high-frequency coil, hydrogenous plasma is produced to treat a gaseous silicon tetrachloride raw material added to a plasma region; two raw materials participate in reaction in a plasma state; and the silicon tetrachloride is hydrogenated into the trichlorosilane. In a high-frequency coil inducted plasma rector, a gas circuit is divided into three circuits of axis central gas, central main gas and protective gas; hydrogenous gas is subjected to plasma arc starting to form a hydrogenous plasma flame region; the gasified silicon tetrachloride is added through an axis center, reacts in the hydrogenous plasma flame region, and is converted into the trichlorosilane; after the reaction, mixed gas is subjected to heat exchange, condensation, cooling and distillation procedures to obtain a trichlorosilane liquid, a silicon tetrachloride liquid, chlorine hydride, hydrogen gas and argon gas respectively, wherein the silicon tetrachloride, circulating hydrogen gas and the argon gas are in the reactor; and the trichlorosilane and the chlorine hydride enter the polysilicon production procedure. The method can concisely treat the silicon tetrachloride as a byproduct of polysilicon with high efficiency and environmental protection, simultaneously obtains raw materials needed by the polysilicon, and greatly reduces the output of waste and production cost for the polysilicon.

The invention discloses a high sintering roller way kiln which comprises a kiln body, a heating system, a measurement and control system, an exhaust system and a transmission system, wherein a furnace chamber of the kiln body is divided into a water discharge area, a pre-heating area, a sintering area and a cooling area, the heating system comprises a magnetron microwave heating system and an electric heating system which are arranged in the furnace chamber, a microwave head of the microwave heating system is installed in a microwave source energy feedback port of the kiln body and faces the furnace chamber, the electric heating system is installed on the pre-heating area and on the upper side and lower side of the sintering area, and the transmission system penetrates through the furnace chamber of the kiln body to form closed-loop transmission. The high sintering roller way kiln is easy to operate and maintain, the quality of sintered materials is high, efficient and energy-saving microwave heating and electric heating can be carried out at the same time for high sintering, and microwave heating and electric heating can exist in the same heating area.

The invention belongs to the technical field of composite molding and relates to a mandrel-free autoclave integral molding method for U-shaped unit stiffened wallboards. According to the mandrel-free autoclave integral molding method for U-shaped unit stiffened wallboards, designed by the invention, a mandrel-free molding method is adopted to meet the requirements of part inner molding quality and vertical rib perpendicularity; and at the same time, the temperature field evenness of dies is improved, multi-die autoclave feeding is realized, and production cost is reduced. A molding device in a molding technology is on the outer side of a vacuum bag, so that the profile precision requirement is not high. U-shaped unit laying dies are only used as laying dies and are not fed into the autoclave with parts, so that the precision requirement is relatively lower. Besides, a pressurization heating process is not carried out, dies are not placed on the parts, fit clearances are not available, pressure is directly applied on the parts, and the inner quality of the parts is great. Compared with a traditional method, the method has the advantages that the molding technology is simple, the manufacture cycle is short, the heat conductivity is great, the temperature rise evenness of the parts is great, and the solidifying of a plurality of components in the large autoclave at a time can be ensured.

The present invention is an integral molding method of a U-shaped unit reinforced wall panel. This method lays up prepregs on the skin molding die 6 and the unit molding die 7, then assembles them together, and takes out the unit molding before curing. The mold 7 is only retained, and only the skin forming mold 6 is retained. This method can meet the requirements of the internal molding quality and verticality of the vertical ribs, and at the same time improve the uniformity of the mold temperature field, ensure the quality of the product, shorten the manufacturing cycle, and reduce the production cost. The U-shaped unit reinforced wall plate prepared by the method has a high degree of integration, good weight reduction effect and high safety, and provides an important key technology for the application of composite materials in large aircraft.

The invention relates to a disc-shaped radial micro-channel radiator. The radiator comprises an upper cover plate, a micro-channel module and a confluence plate. The upper cover plate is connected with the inlet pipeline, and the confluence plate is connected with an outlet pipeline; the upper cover plate and the confluence plate are connected, a cylindrical space is formed in the upper cover plate and the confluence plate, and the micro-channel module is arranged in the cylindrical space; and the micro-channel module structurally comprises a circular substrate, a through hole is formed in the middle of the substrate, a plurality of rib plates are formed on the upper surface of the substrate and radially extend from the edge of the through hole to the outer ring of the substrate, a micro-groove with a gradually increased flow section is formed between every two adjacent rib plates, and the upper surface of the substrate is attached to the upper cover plate, so an inflow channel is formed between the microgroove and the upper cover plate. The micro-channel radiator is used for solving the problem that an existing micro-channel radiator is not matched with annular and rotating parts, and the problem that the temperature is not uniform due to the fact that flow in the micro-channels is not uniform in the circumferential direction is solved through the outlet and the inlet which are formed in the radiator in the axis direction and the radial micro-channels.

The invention discloses a durability tester for a temperature controller, which comprises a power supply unit, a load unit, a detection control unit, an output unit, a heating unit and a cooling unit. The durability tester is characterized in that the heating unit comprises a copper block in which a heating pipe is arranged, the heating pipe is connected with the power supply unit, an upper surface of the copper block is provided with a thermoelectric couple for acquiring the temperature of the copper block in real time, the thermoelectric couple is connected with the detection control unit, and the upper surface of the copper block is further provided with an insulating heat-resistant pressure plate for fixing a temperature sensitive part of a temperature controller; the cooling unit is a cooling airflow sprayer arranged over the insulating heat-resistant pressure plate and connected with an external air pump of the tester; and the temperature controller is connected with an input end of the load unit through a lead. The durability tester has the advantages that the heating mode of the tester is small in thermal inertia, so that an adjustable range of the conduction and the disconnection of the temperature controller is large, the range of the heating temperature is large, the heating temperature and the cooling speed can be accurately controlled, accuracy of the test result can be improved, and the tester is simple in structure and low in cost.

Disclosed is a preparation method for obtaining a kilogram-grade high temperature alloy undercooled melt. According to the preparation method, a medium-frequency induction power source is adopted as a heating power source, a convection current is generated through medium-frequency induction heating, and a macroscopic temperature field of the melt is more even so as to ensure that the melt is evenly cooled at the same time. A high-purity quartz crucible is used as a heating crucible, a B2O3 glass fusion covering agent is used as a cleaning agent or argon is inflated for protection, repeated circulated overheating treatment is adopted to conduct purification treatment on the melt, and the best purification effect is achieved by controlling the overheating temperature, the heat preservation temperature and the cycle index. The cooling rate is reasonably controlled, the temperature difference between the interior and the exterior of the melt is limited within 3 DEG C, and the whole melt is evenly cooled at the same time. The temperature field obtained by the preparation method and the structure of the melt are better in evenness, the whole kilogram-grade undercooled melt is in the undercooled state, the undercooled melt is better in flowability, and the solid fraction is lower than 0.2%. The preparation method is applicable to the field of micro-casting, and whole fine-grain ingot castings can be obtained by controlling the follow-up cooling speed of the kilogram-grade undercooled melt.

The invention relates to a double-pushed-slab kiln for producing nitrided ferrovanadium. The double-pushed-slab kiln comprises a water discharging and primary reducing section, a K<+>and Na<+>discharging and secondary reducing section, a constant temperature and nitriding section and a cooling section, all of which are sequentially connected. The water discharging and primary reducing section is divided into four temperature zones from T1 to T4. The K<+> and Na<+>discharging and secondary reducing section is divided into six temperature zones from T5 to T10. The constant temperature and nitriding section is divided into ten temperature zones from T11 to T20. The cooling section is divided into a nitrogen natural cooling area and a forced cooling area in which indirect water cooling and nitrogen cooling are combined. The double-pushed-slab kiln is high in using safety and reliability, slab arching is avoided, and energy is saved.

The invention relates to a low-cost quick solidifying method for a composite material. A middle-frequency electromagnetic induction coil directly acts on a metal mould to self heat and solidify to form a composite material, middle frequency heating speed is high, the uniformity of a temperature field is good, the control is exact, the temperature overshoot is small, the production efficiency is greatly improved, and the product quality is ensured; furthermore, by utilizing middle-frequency electromagnetic induction heating, only the self metal mould is heated, a non-metal auxiliary material for forming the composite material is not heated, and the ambient temperature is very low after a special coating is utilized in a forming process, so that a very expensive high-temperature-resistance auxiliary material is not necessary to use when a high-temperature-resistance composite material such as bismaleimide and polyimide is formed; therefore, the manufacturing cost is saved and the energy consumption is low.