11results about How to "Reduce heating rate" patented technology

This utility model discloses a bridge-type lifting edge cutting machine for building stone, relating to the field of edge cutting machines. It includes a base, with a first sliding groove in the center of the upper surface of the base, and second sliding grooves on both sides of the first sliding groove on the upper surface of the base. A moving component is slidably engaged inside the first sliding groove. A shatterproof support plate is fixedly installed at one end of the base, and a blade retraction groove is formed on the shatterproof support plate. By setting the shatterproof support plate, during use, the edge of the stone and the main body of the stone are respectively located on both sides of the blade retraction groove. When the cutting blade cuts, the shatterproof support plate provides reliable support to the edge of the stone, preventing insufficient support and edge breakage. Furthermore, the cut scraps slide down through the material retraction groove, achieving automatic cleaning. This not only protects the integrity of the stone during processing but also automatically cleans up waste, preventing accumulation. The structure is simple and the effect is good.

The invention discloses a rock drill drilling hydraulic system, which relates to the technical field of rock drill hydraulic systems and comprises a hydraulic power unit, an impact execution unit, a propulsion execution unit, a geological sensing unit, an intelligent control unit and an oil temperature adjusting unit. A variable displacement piston pump of the hydraulic power unit supplies energy to the system; the geological sensing unit collects geological parameters through a drill rod torque sensor and a vibration sensor; the intelligent control unit calls a pre-stored mapping relation table to be matched with target impact pressure, precise pressure control is achieved through a PID adjusting impact valve set, and the displacement of a variable pump is synchronously adjusted; the oil temperature adjusting unit is linked with the plate heat exchanger through the temperature sensor to cool oil temperature. According to the system, self-adaptive adjustment of impact pressure of different geological stratums is achieved, throttling loss is avoided, oil temperature rising is relieved, the drilling efficiency is improved by 15%-20% through cooperation of the two, the continuous operation oil temperature is controlled to be 60 DEG C or below, the service life of equipment is prolonged, and the maintenance cost is reduced.

This invention pertains to composite material manufacturing technology and relates to a method and structure for curing and stamping at the chamfered position of a honeycomb sandwich structure autoclave. A thermally conductive material is laid on the plane where the stamping position of the honeycomb sandwich structure is located, extending from the stamping position to the center of the plane; the thermally conductive material is positioned between the release film, the breathable felt, and the vacuum bag.

The application belongs to the field of ceramic powder preparation, and discloses a method for in-situ preparation of high-performance TiB2-B4C composite ceramic from sapphire fine grinding waste. The method uses the waste produced in the sapphire grinding process as raw material (B4C, Al2O3 and Fe), adds TiO2 and C after alkali washing and purification, and combines with the discharge plasma sintering to in-situ prepare TiB2-B4C composite ceramic. The method not only realizes the comprehensive recovery of B4C in the sapphire fine grinding waste slurry, reduces environmental pollution, but also provides a method for in-situ preparation of TiB2-B4C composite ceramic from waste, changes waste into treasure, and realizes the secondary use of resources. In addition, the raw material cost is low, and the method has obvious economic value and environmental protection significance. The method has the advantages of short process, small pollution, simplicity and the like, and can be used for industrial production.

This invention provides a method for preparing carbon-coated lithium manganese iron phosphate cathode material, belonging to the field of battery cathode material technology. The method includes the following steps: co-precipitating a mixed solution of iron, manganese, and phosphorus sources with a precipitant solution, and drying to obtain a lithium manganese iron phosphate precursor; adding a lithium source, and calcining and grinding in an inert gas atmosphere to obtain lithium manganese iron phosphate powder; ball milling the lithium manganese iron phosphate powder with a flux, dispersing it in a carbon source solution, uniformly coating the carbon source, and then drying, calcining in stages, and ball milling to obtain the final product. By controlling the rate of reaction in stages with the phosphorus, manganese, and iron source solutions, the uniformity of precursor nucleation and coating is improved; the use of a mixed lithium source and staged calcination reduces lithium volatilization; and coating the lithium manganese iron phosphate powder with a modified nitrogen-doped porous carbon source generates the lithium manganese iron phosphate cathode material, enhancing its conductivity.

The invention provides a balloon plugging device for ultrasonic 3D printing, which comprises a multi-cavity catheter, the multi-cavity catheter comprises an outer layer protective sleeve, an inflation catheter and an ink delivery pipe, the inflation catheter and the ink delivery pipe are located in the outer layer protective sleeve, and the axes of the outer layer protective sleeve, the inflation catheter and the ink delivery pipe are parallel; the outer-layer protective sleeve is provided with a first sealing face and a second sealing face which are perpendicular to the axis, the first sealing face is the front end face of the outer-layer protective sleeve, the second sealing face is located at one end close to the front end face of the outer-layer protective sleeve, and the position, between the first sealing face and the second sealing face, of the outer-layer protective sleeve is connected with a pneumatic balloon. The pneumatic balloon is communicated with a cavity between the first sealing surface and the second sealing surface; the front end of the inflation catheter is communicated with the pneumatic balloon, and the front end of the ink conveying pipe extends out of the first sealing face. Blood flow and uncured acoustic ink can be physically isolated through the pneumatic balloon, the ink is prevented from being washed away by the blood flow, and meanwhile, hydrogel particles of the acoustic ink are prevented from entering blood to cause thrombus.

The application relates to the technical field of drilling processing, and discloses a micro drill bit and a processing device. The micro drill bit comprises a drill tip, a drill body and a drill handle which are sequentially connected from front to back along the axial direction of the micro drill bit; a transition part is connected between the drill handle and the drill body; a supercooling channel is arranged in the drill handle, one end of the supercooling channel extends to the transition part, the outer peripheral wall of the transition part is provided with a first jet hole which is in communication with the supercooling channel and is open to the drill tip, and the supercooling channel is adapted to be in communication with an external cold source, and the first jet hole is open to the drill tip. In this way, the first jet hole can obtain cooling medium from the external cold source and spray the cooling medium to the drill tip by arranging the first jet hole on the transition part, the cooling medium can cool the drill tip to reduce the temperature of the drill tip, compared with the prior art, the temperature rising speed of the drill bit can be slowed down, the wear speed of the micro drill bit can be reduced, the processing quality of a hole structure can be improved, and the service life of the micro drill bit can be prolonged.

The application belongs to the technical field of lithium extraction, and particularly relates to a titanium-based lithium extraction adsorbent and a preparation method and application thereof. The preparation method provided by the application comprises the following steps: a) mixing and grinding a lithium compound, a titanium compound, a zirconium compound, a niobium compound, an iron compound, a pore former and water, and drying to obtain a mixed powder; b) placing the mixed powder in a calcination device, first heating from ambient temperature to a first temperature at a first heating rate, then heating from the first temperature to a second temperature at a second heating rate, and calcining at the second temperature to obtain a precursor powder; c) granulating the precursor powder to obtain activated adsorbent particles; and d) placing the activated adsorbent particles in an acid solution for activation treatment to obtain the titanium-based lithium extraction adsorbent. The preparation method provided by the application can improve the adsorption capacity, ion selectivity and structural stability of the lithium extraction adsorbent, reduce the solution loss of the lithium extraction adsorbent, and prolong the service life of the lithium extraction adsorbent.

The present application relates to the technical field of vehicle control, and discloses a TCU low-speed lock system and method, which preliminarily predicts the deceleration expectation of a driver when downhill driving by sensing different brake strokes and brake forces, fuses the slope + wheel speed / rotation speed signals detected by an IMU in real time, dynamically calculates a target gear by a TCU according to various sensors and other vehicle information, automatically calculates an optimal lock point, and synchronously adjusts fuel injection quantity, ignition angle and other electronic injection parameters by a joint ECU during the collaborative action of an electric control clutch and a gear shifting motor, so as to realize multi-system collaborative control, reduce brake load, reduce brake disc temperature rising speed, prolong the service life of the brake disc, greatly improve the engine braking efficiency, smooth the downshift and lock processes, improve the driving stability of the vehicle on a curve, improve the fuel economy of the vehicle and optimize the driving experience.