8results about How to "Reduce thermal shock" patented technology

The invention relates to the field of material surface treatment and machining, in particular to a method and device for directly preparing a copper alloy coating on the surface of a titanium alloy sealing rod. The process comprises the steps that firstly, cleaning and metal powder drying treatment are conducted on a sealing rod base material, and the base material is clamped on a rotary bearing mechanism in an adjusting box body; sealing the adjusting box body and filling inert gas to replace air until the oxygen content reaches the standard; the laser cladding mechanism is controlled to conduct scanning preheating on the surface of the base material in a non-powder-feeding state; then a powder feeding function is started, spiral high-speed laser cladding is carried out in cooperation with rotation of the base material and axial feeding of the cladding assembly, and closed-loop adjustment of the protective gas flow is carried out in the cladding process; and after cladding is completed, the base material is transferred into the heating furnace body in the box body to be subjected to post-treatment slow cooling, laser scanning preheating and in-furnace slow cooling are combined, atmosphere closed-loop control in a closed environment is matched, and the effect of restraining cracking and oxidation of a titanium alloy cladding layer is achieved.

The utility model relates to a pyrolysis activation all -in -one of resin resourceful regeneration, including pyrolysis activation jar, feed pipe, flue gas pipeline and preheating utilization mechanism, the pyrolysis activation jar side intercommunication has flue gas pipeline, is equipped with the feed pipe at the top, preheating utilization mechanism installs at the feed pipe surface, and with flue gas pipeline exhaust end intercommunication, hot gas in pyrolysis activation jar passes through flue gas pipeline and enters into rotary pipeline inside, and the inside rotary pipeline is equipped with heat conduction sleeve, and heat conduction sleeve surface is opened with the spiral groove of rotary pipeline adaptation, and the contact area of rotary pipeline and heat conduction sleeve increases, better heat absorption of rotary pipeline is absorbed to heat conduction sleeve surface, and is given to feed pipe, and the resin passes through the feed frame of external equipment and enters the feed pipe, wherein the external equipment is equipped with control valve, and the resin in feed pipe is preheated and handled, and the feed pipe surface is equipped with the heat preservation frame, can lock the heat, reduces the loss of heat.

The utility model discloses a temperature control device for a high-temperature pump, the temperature control device for the high-temperature pump is arranged between a pump body of the high-temperature pump and a motor, the temperature control device comprises a device main body, an axial spiral flow channel and a labyrinth flow channel, the upper end of the device main body is connected with a shell of the pump body, and the lower end of the device main body is connected with a shell of the motor; the axial spiral flow channel is arranged so that circulating heat dissipation can be achieved through flowing of a high-temperature working medium; and the labyrinth runner is used for prolonging a cooling path and increasing a turbulence effect so as to improve the heat exchange efficiency.

The invention discloses a high-temperature-resistant metal casting demolding coating and a preparation method thereof, and belongs to the technical field of coatings. The components of the coating are optimized, the composite binder formed by compounding the organic binder and the inorganic binder is adopted, and the high-temperature-resistant auxiliary agent composed of the zirconite powder, the corundum powder and the nano cerium oxide is combined, so that the temperature tolerance of the coating is remarkably improved, and the service life of the coating is remarkably prolonged; the added hexagonal boron nitride can form a compact and smooth coating surface, the adhesion between a metal melt and a mold can be effectively reduced by combining the high-temperature-resistant auxiliary agents of different grades and utilizing the filling-supporting-lubricating synergistic effect and synergistic effect of particles of different sizes, and efficient and stable demolding performance is achieved; and the nano aluminum oxide can form chemical bonding with hexagonal boron nitride and the composite binder, so that the interface bonding force is further enhanced, the coating is prevented from being layered and peeled off under high-temperature impact, the thermal impact of molten metal on the mold is effectively buffered, and the service life of the mold is prolonged.

This invention discloses a method for drying raw materials using waste heat from a sintering brick kiln, relating to the field of sintering brick raw material drying technology. The invention first constructs a material pre-drying platform on the top surface of the tail section of the sintering brick kiln, places the material on the pre-drying platform, and opens a connecting opening at the top of the tail section near the brick outlet. The dryer is then mounted above the connecting opening, and an insulation structure is installed outside the drying equipment. This invention utilizes the waste heat of the kiln to pre-dry the raw materials, removing most of the moisture, before they enter the dryer for further drying. The waste heat from the kiln tail section is discharged through the connecting opening, acting on the dryer cylinder, and then conducted to the material inside the dryer. This isolates the kiln flue gas from contact with the material, preventing impact on the material's properties and sulfur content. The insulation structure also prevents flue gas escape and facilitates temperature control during drying.

This application discloses an automotive wheel hub mold with upper and lower split side molds, including an upper mold, a lower mold, and several side molds. The side molds include a front wheel rim side mold and a rear wheel rim side mold that fit together vertically. The front wheel rim side mold is equipped with a cooling device. This cooling device guides the cooling medium to uniformly and rapidly cool the thickness portion where the front wheel rim connects to the spokes. It includes a cooling chamber, a reflector plate, a water inlet pipe, and a return pipe. The reflector plate is located at the top of the cooling chamber. One end of the water inlet pipe extends into the cooling chamber and slopes upwards towards the reflector plate. The core solution employs a cooling device with a reflector plate. Through optimized pipe structure and program control, uniform dispersion and cooling of the cooling medium are achieved, improving the casting efficiency and solidification quality of this type of wheel, while reducing localized thermal shock to the mold and reducing the risk of surface cracking.

This invention relates to the field of power regulation technology, and particularly to an AC power regulation method and system based on zero-crossing control. The method includes: calculating a target output voltage based on a set power or control target; determining a corresponding operating level from a set of preset voltage levels based on the target output voltage; ensuring the target output voltage does not exceed the voltage of the highest voltage level among the preset voltage levels; calculating the number of conduction cycles of the operating level within one power regulation cycle based on the target output voltage; and controlling the operating level to turn on or off at the voltage zero-crossing moment within one power regulation cycle based on the number of conduction cycles. This invention presets multiple voltage levels and combines them with zero-crossing conduction control to map the target voltage to a combination of level and conduction cycle number, switching levels at the zero-crossing moment, preserving low harmonic characteristics, improving power regulation resolution, reducing power jumps and thermal shocks, and achieving high-precision, low-interference AC power regulation.

The utility model discloses a strain fermentation tank based on waste heat phase change energy storage, which comprises a tank body, a stirring system and a jacket temperature control system, a jacket is arranged on the outer wall of the tank body, a phase change material layer is filled between the jacket and the outer wall of the tank body, and the melting point of the phase change material is minus DEG C; a cooling water inlet of the jacket is positioned at the bottom of the tank body, a cooling water outlet is positioned at the top of the tank body, and a phase change material layer (with the melting point of 28-32 DEG C) filled between the jacket and the outer wall of the tank body forms a thermal buffer zone near the optimum growth temperature of strains by utilizing the phase change energy storage characteristic. When hyphae metabolize to produce heat, the phase change material preferentially absorbs latent heat to delay temperature rise; after the cooling system is started, heat stored in the cooling system is slowly released, and sudden temperature drop is avoided. Compared with the periodical fluctuation of + / -2 DEG C of a traditional jacket, the structure can control the temperature fluctuation to be + / -0.5 DEG C, thermal shock is reduced through a smooth temperature curve, and the enzyme activity of hyphae is kept stable.