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659results about How to "Change properties" patented technology

Outside pressurized type dynamic and static pressure gas lubricating and sealing device

The invention discloses an outside pressurized type dynamic and static pressure gas lubricating and sealing device, which comprises a moving ring (5) and a seal static ring (11), wherein the moving ring (5) is fixed on a moving ring seat (1) and rotates along with a spindle, and the seal static ring (11) is fixed on a seal cavity (2) and a seal end cover (12); channels (9) for introducing outsidepressurized gas from outside are arranged in the seal static ring (11), and the channels (9) of certain numbers are distributed in the seal static ring (11) along circumference; throttle devices (8) are arranged in the channels (9), and pressure equalizing troughs (7) of certain depth are arranged at the outlets of the channels (9); various dynamic pressure troughs (6) having dynamic pressure effects are formed on the end face of the moving ring (5) or the seal static ring (11), and the inside and outside of the pressure equalizing troughs (7) are provided with seal dams not communicated withthe pressure equalizing troughs; and on-line monitoring is realized by adjusting the pressure of the outside pressurized gas. The pressurized type dynamic and static pressure gas lubricating and sealing device greatly lowers resistance moment and power consumption and improves the phenomenon that the traditional end face seal abrasion is severe.
Owner:BEIJING UNIV OF CHEM TECH

Method for preparing low density polypropylene foam section or beads by two-step extrusion molding

The invention discloses a method for a preparing low density polypropylene foam section or beads by two-step extrusion molding, which comprises the following steps that: expandable master batch is prepared from 30 to 80 portions of polypropylene, 10 to 40 portions of foaming agent, 0 to 15 portions of foaming accelerant, 0 to15 portions of dispersant and 0 to 10 portions of nucleating agent at a temperature below the decomposition temperature of the foaming agent and above a viscous flow temperature of the polypropylene; 20 to 99 portions of polypropylene with high melt strength, 0 to 70 portions of common polypropylene and 1 to 10 portions of expandable master batch are plasticizated and extruded together; supercritical gas is added to perform the blending of the plasticizated and extruded mixture; and the product obtained is made to generate foamcores in a foaming nucleation apparatus to form the section or beads finally. A chemical foaming agent is partially decomposed and foamed during the plasticization and extrusion, so that the viscosity of fused mass is reduced, the dissolution and dispersion of the supercritical gas are facilitated, and a problem that a foam imploding is likely to happen in a secondary forming process so as to influence the quality and appearance of secondarily formed product is solved as the chemical foaming agent retained in molding beads can be decomposed and foamed again during the secondary processing.
Owner:SICHUAN UNIV

Preparation method of alumina composite nickel-cobalt lithium manganate ternary material

The invention provides a preparation method of an alumina composite nickel-cobalt lithium manganate ternary material. The preparation method comprises the following steps: (1), preparing liquor A; (2), preparing liquor B; (3), installing and configuring a reaction flask; (4), adding the liquor A and the liquor B into the reaction flask to participate in hybrid reaction; (5), preparing liquor C, and adding into the flask for reaction; (6), obtaining a precursor by suction-filtering, washing and drying; and (7), mixing and roasting the precursor with a lithium source to prepare the alumina composite nickel-cobalt lithium manganate ternary material. The preparation method disclosed by the invention has the beneficial effects that firstly, liquid-phase coating is adopted, production preparation period is short, efficiency is high, and coating and dispersing are uniform; secondly, the coating layer alumina on the surface of the ternary material is a film with an amorphous structure, so that charging and discharging voltage difference is reduced, multiplying power performance and high-performance performance of the material are improved; and thirdly, characteristics of a solid-liquid phase interface among an anode material, electrolyte and a diaphragm are improved by alumina film-coating, so that velocity and efficiency of electrochemical reaction are improved.
Owner:博尔特新材料(银川)有限公司

Nutritional health bread rich in wheat bran dietary fiber and preparation method of nutritional health bread

The invention discloses a nutritional health bread rich in wheat bran dietary fiber and a preparation method of the nutritional health bread. The bread is light brown, full in appearance, smooth in surface and normal in size, and does not have cracks and is not deformed. The internal structure is uniformly spongy, fine, soft and flexible, and the bread has light fresh scent and sweet taste of wheat bran, does not have pungent smell, and is good in palatability. The bread has the advantages as follows: 1 the dietary fiber prepared from the raw material of wheat bran through compound enzymolysis is added into the bread, and the dietary fiber has the functions of moistening lung, moisturizing skin, preventing and resisting cancer, strengthening the spleen and harmonizing the stomach, blackening and strengthening hair and clearing intestines and stomach, so that the nutrition and functionality of the nutritional bread are improved; 2 the bran is soaked, washed and rinsed so as to remove protein, starch and phytic acid, so that the palatability of the bread is improved; 3 the water-soluble dietary fiber is added in raw materials of the bread, so that the rheological property and nutritional property of the bread are changed, and the nutrition arrangement of the bread is scientific and reasonable.
Owner:QINGDAO JIARUI BIOLOGICAL TECH

Six-degree-of-freedom micro vibration abatement platform and control method thereof

The invention discloses a six-degree-of-freedom micro vibration abatement platform. The six-degree-of-freedom micro vibration abatement platform comprises a foundation platform, a load platform, six sets of totally identical single-degree-of-freedom active / passive composite vibration insulating devices, and a controller; and the upper and lower two ends of each set of single-degree-of-freedom active / passive composite vibration insulating devices are respectively connected with the foundation platform and the load platform. A control method comprises logic shaft signal calculation, logic shaft control signal calculation, physical shaft real-time control signal calculation and transfer steps. The six-degree-of-freedom micro vibration abatement platform is simple in structure and adjustable in rigidity, can inhibit and isolate six-degree-of-freedom micro vibration in translation and rotation directions of axles X, Y and Z, can be suitable for different places, can effectively attenuate micro vibration on different frequency bands, provides reliable guarantee to precise machining and measuring equipment under micro vibration environments, solves the problems of complex structure and complex control mode in a traditional active / passive composite vibration insulating mechanism, and realizes multi-degree-of-freedom vibration inhibition.
Owner:HUAZHONG UNIV OF SCI & TECH

Three degree of freedom micro-vibration suppression platform and control method thereof

The invention provides a three degree of freedom micro-vibration suppression platform and a control method thereof, belongs to vibration isolation and suppression devices, and solves problems of complicated structure and complex control method of a prior active-passive composite vibration isolation structure. The platform provided by the invention includes a base platform, a load platform, three sets of single degree of freedom active-passive composite vibration isolation assemblies which are totally identical and a controller. The upper end and the lower end of each single degree of freedom active-passive composite vibration isolation assembly are connected with the load platform and the base platform. The control method provided by the invention includes calculating logic axis translation signals, calculating logic axis control signals, calculating physical axis real time control signals and transmission steps. The platform provided by the invention is simple in structure, adjustable in rigidity, is capable of suppressing and isolating three degree of freedom microvibration in rotation directions of an X axis and a Y axis and a translation direction of a Z axis and is suitable for different occasions. Microvibration of different frequency bands can be dampened effectively and reliable guarantee can be provided for precision machining and measurement equipment in a microvibration environment.
Owner:HUAZHONG UNIV OF SCI & TECH

Device and method for integrally treating refractory organic wastewater

The invention provides a device for integrally treating refractory organic wastewater. The device comprises a reaction unit, an ultraviolet / ozone generating diffusion unit, an electrochemistry catalysis unit, an ultrasound unit and a power supply. A water inlet is arranged on the lower portion of the reaction unit, and a water outlet is arranged on the upper portion of the reaction unit; the ultraviolet / ozone generating diffusion unit comprises a quartz casing pipe with an ultraviolet lamp tube arranged inside, a gas pump and a gas diffuser which are connected successively, and the gas diffuser is arranged at the bottom of the reaction unit; the quartz casing pipe is arranged in the reaction unit, one end of the quartz casing pipe is provided with a gas inlet tube, and the other end is provided with a gas outlet tube and connected with the gas pump; the electrochemistry catalysis unit and the ultrasound unit are arranged in the reaction unit; and the ultraviolet lamp tube, the electrochemistry catalysis unit and the ultrasound unit are connected with the power supply respectively. The device is simple and compact in structure, small in occupied area, convenient to use, low in cost, convenient to operate and manage, good in water quality purifying effect and high in treatment efficiency.
Owner:无锡博泛特工程设备有限公司
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