34results about How to "Strong temperature" patented technology

The invention relates to a FeMnNi powder accelerant with low cost, wherein the alloy comprises the components in percentage by weight as follows: 30-50% of Mn, 0-10% of Ni, 1-3% of Cr, 0.1-0.8% of C, 0.05-0.2% of Si and the balance of Fe. The oxygen content of a powder accelerant product optimized is less than or equal to 300ppm, and the nitrogen content is less than or equal to 180ppm. The accelerant is prepared by a gas atomization process of inertial gas, so that the accelerant powder is spherical or approximately spherical with uniform alloy composition. Diamond synthesized by the accelerant and graphite in proportion is greyish-green or dark green in color, and the crystal form of the diamond is a polygonal aggregate in a granular structure. The per mixed unit yield reaches over 154 carat / block by cavity with diameter of 40mm, the static pressure strength is average about 20N, and the coarsness proportion of 80 / 100 reaches over 60%, so that the accelerant is an ideal raw material for manufacturing an efficient diamond grinding apparatus for crisp and hard materials.

The invention discloses a corn starch adhesive and a preparation method thereof. The corn starch adhesive is prepared from corn starch, potassium permanganate, sodium hydroxide, borax, sodium thiosulfate, sodium bentonite and water. The preparation method comprises the following steps of: grinding and screening the sodium thiosulfate; preparing pasty corn starch in a constant-temperature water bath; mixing the water, the potassium permanganate and the screened sodium bentonite in the constant-temperature water bath, and pouring into the pasty corn starch to prepare mixed solution; adding water to dissolve the sodium hydroxide, the borax and the sodium thiosulfate, and pouring into the mixed solution to prepare the finished product. The preparation process is simple, and the conventional equipment is not needed to be changed; during production, the temperature is low, and the energy consumption is low; and the produced starch adhesive has the advantages of good liquidity, strong adhesiveness, quick drying, high stability, no pollution, and can greatly improve the ring crush compression resistance and the tension strength of corrugated paper.

The invention relates to the technical field of range hoods, in particular to an AC motor used in range hoods, comprising a casing, a core is arranged in the casing, a center shaft is arranged in the middle of the core, and the casing comprises The front-end housing and the rear-end housing are inserted and connected, and the side wall of the rear-end housing is bent and folded outward to form a ring-shaped groove, and the inner cavity of the ring-shaped groove forms a return channel through the guide spacer. The two ends of the channel are cyclically connected by the circulating pump and the cooling coil; the rear end of the central shaft is provided with a synchronizing section, and outside the synchronizing section, the cooling fan and the circulating pump are respectively linked with the fan synchronizing ring and the pump body same ring which are slidingly connected. And one side of the fan synchronizing ring and the same ring of the pump body are respectively connected with an air-cooled heat dissipation adjusting mechanism and a liquid-cooled heat dissipation adjusting mechanism. The present invention can achieve accurate and appropriate heat dissipation effect according to the temperature change of the AC motor of the range hood, and keep the inner cavity of the housing in a more tightly sealed state, thereby preventing the intrusion of oil fume into the housing.

The invention provides a method for obtaining immobilized tyrosinase by using polyacrylonitrile microspheres as carriers, and an application. According to the method, the modified polyacrylonitrile microspheres are used as the carriers, tyrosinase is used as an immobilized enzyme, through glutaraldehyde covalent cross-linking combination, the tyrosinase is immobilized on the polyacrylonitrile microspheres, and the purpose of degrading phenolic compounds can be achieved. The method disclosed by the invention is simple, the cost of raw materials is low, the reaction condition is easy to realize, the cyclic utilization effect of the synthetized immobilized tyrosinase is good, the pH tolerance is high, the temperature tolerance is high, the immobilized tyrosinase is heated stably, and the tyrosinase combined to the polyacrylonitrile microspheres can effectively remove phenolic substances in waste water under the effect of oxygen. According to the method disclosed by the invention, the phenolic compounds are degraded by a biological method, and the method conforms to the current international development trend of green decontamination and environmental-friendly decontamination.

The embodiment of the invention discloses an electric servo control method for a firebrick pressing skip car, and the method comprises the steps that man-machine interaction equipment obtains a target set value of the skip car, and transmitting the target set value to a controller; the controller generates an initial instruction according to the target set value, and outputting the initial instruction to a servo controller; the servo controller generates a control instruction according to the initial instruction, and outputs the control instruction to a servo motor so as to control the rotating speed of the servo motor; the servo motor rotates according to the control instruction; a coder detects a feedback signal in real time and enables the feedback signal to be fed back to the servo controller; and the servo controller enables the feedback signal to be compared with the initial instruction, and adjusts the outputted control instruction. The embodiment of the invention also discloses an electric servo control system for the firebrick pressing skip car. The system provided by the invention replaces a conventional hydraulic control system, effectively simplifies a hydraulic oil path, employs a closed loop mode, improves the control precision, and improves the system response speed and stability.