32results about How to "Simple structure and easy access" patented technology

The invention provides an organic dye which uses five-membered heterocyclic ring, derivatives thereof and a dye-sensitized solar cell prepared by the organic dye. The dye uses the five-membered heterocyclic ring or the derivatives thereof as a Pi unit, uses substituted triarylamine as an electron donor, uses cyanoacetic acid structure as an electron acceptor, and belongs to molecule of D-Pi-A structure. The dye molecule belongs to pure organic compounds, the structure of the materials is simple and is easy to be obtained; expensive materials of metal of Ru and purifying agent of polydextrose do not need to use, the compound yield is higher, so the total yield is between 40 percent and 70 percent; besides, the performance of spectral absorption and molar extinction coefficient and the like of the dye are excellent; and the peak value of the spectral absorption is over 550nm at the most, the molar extinction coefficient is over 48000M<-1>cm<-1>, the peak value and the coefficient are more than the Ru dye, therefore, the dye has wider absorption range to the sunlight. The dye-sensitized solar cell prepared by the organic dye has the maximum of quantum conversion efficiency of 97 percent and the highest photoelectric conversion efficiency of more than 8.0 percent.

The invention discloses a polyether-ether-ketone modified polytetrafluoroethylene composite material, a bearing retainer and a making method of the bearing retainer. The composite material comprises, by mass, 18-25% of polyether ether ketone, 5-8% of tungsten disulfide, and the balance of polytetrafluoroethylene. The composite material comprises polytetrafluoroethylene, polyether-ether-ketone and tungsten disulfide. Polyether-ether-ketone has good temperature resistance, hydrolysis resistance, compression strength and corrosion resistance, has a low friction coefficient and has wear fastness, tungsten disulfide has high compression strength and high oxidation resistance, and very low friction coefficient, and polyether-ether-ketone and tungsten disulfide are used to modify polytetrafluoroethylene as fillers, so the obtained composite material reserves the lubrication performance of polytetrafluoroethylene, improves the dimension stability, the compression strength and the wear resistance of polytetrafluoroethylene, and has a greatly higher thermal deformation temperature than a pure polytetrafluoroethylene material, thereby requirements of the material of the retainer by long life bearings are met.

The invention provides a organic dye containing thiophene ethylene and a dye-sensitized solar cell produced from the organic dye. The organic dye containing thiophene ethylene takes thiophene or the derivatives thereof as conjugated units so as to replace triarylamine functioning as an electron donor and cyanoacetic acid functioning as an electronic acceptor, and the thiophene or the derivatives thereof are molecules which are in D-Pi-A structures. The organic dye containing thiophene ethylene belongs to pure organic compounds and does not need expensive raw materials including metal such as ruthenium and decontaminant such as dextran glucan and has synthetic yield of 50 percent in total; in addition, the organic dye containing thiophene ethylene has the maximum spectral absorption peak of over 560 nm, the molar extinction coefficient of over 35*10Mcm, wider sunlight absorption range and other excellent performance superior to the performance of ruthenium dyes and most organic dyes. The dye-sensitized solar cell produced from the organic dye containing thiophene ethylene has the maximum quantum conversion efficiency of 90 percent and the maximum monochromatic incident photon-to-electron conversion efficiency (IPCE) of over 8.0 percent.

The invention relates to a synthesis device and a synthesis method of an iron oxide magnetic nano material. The technical scheme comprises that a water bathtub is placed on a supporting plate of a constant-temperature magnetic stirrer; a cavity of the water bathtub is filled with water; the lower part of a three-necked round-bottom flask is soaked in the water; an air inlet of a vacuum pump is connected with a first interface of a tee joint through a first hose; an air outlet of an air bag is connected with a second interface of the tee joint through a second hose; a third interface of the teejoint is hermetically connected with one inlet/outlet of the three-necked round-bottom flask through a third hose; a burette and a separating funnel which are hermetically connected are respectivelyarranged on the other two inlets/outlets of the three-necked round-bottom flask; the multiphase reaction process of nano synthesis can be flexibly controlled through the device, meanwhile, influence factors of coprecipitation reaction are reasonably regulated and optimized, and by controlling synthesis conditions, the synthesized magnetic nano Fe3O4 and nano alpha-Fe2O3 are good in monodispersity,controllable in particle size, high in purity and controllable in form.

The invention relates to an emergency gear control device for an automatic gearbox. The problem that an existing mainstream automatic gearbox is short of emergency gears is solved. Three work modes of a neutral position, a gear 1 and a reverse gear are achieved, and only one work mode of the emergency gear control device is in an operating state every time. The neutral position work mode comprises a linkage switch, a relay 1K and three normally-open contacts, and the three normally-open contacts are connected with a solenoid valve A, a solenoid valve B and a solenoid valve C respectively. The gear 1 work mode comprises a linkage switch, a relay 2K and two normally-open contacts, and the two normally-open contacts are connected with the solenoid valve B and the solenoid valve C respectively. In addition, a time-delay relay 4K and a normally-open contact are further included, and the normally-open contact is connected with a solenoid valve D. The reverse gear work mode comprises a linkage switch, a relay 3K and two normally-open contacts, and the two normally-open contacts are connected with the solenoid valve A and the solenoid valve C respectively. The emergency gear control device is simple in structure and high in reliability. The emergency gear control device has a more obvious function when applied to the high-power AT gearbox.

The invention relates to an organic dye and a dye-sensitized solar cell produced from the organic dye, in particular to an organic dye taking thiophene and 3,4-ethyl disulfide thiophene or the derivatives of the thiophene and the 3,4-ethyl disulfide thiophene as conjugated units and a dye-sensitized solar cell produced from the organic dye. The organic dye does not need expensive raw materials including metal such as ruthenium and decontaminant such as dextran glucan and has high synthetic yield of 60-70 percent in total; in addition, the organic dye has the maximum spectral absorption peak of over 580 nm, the molar extinction coefficient of over 36*10Mcm, wider sunlight absorption range and other excellent performance superior to the performance of ruthenium dye and most organic dye. The dye-sensitized solar cell produced from the organic dye has the maximum quantum conversion efficiency of 94 percent and the maximum monochromatic incident photon-to-electron conversion efficiency (IPCE) of over 7.0 percent.

The invention relates to a preparation method of (S)-(+)-3,4,8,8a-tetrahydro-8a-methyl-1,6-(2H,7H)-naphthoquinone. According to the preparation method, an L-proline derivative is used as a chiral catalyst and microwave radiation is introduced into chiral preparation of the (S)-(+)-3,4,8,8a-tetrahydro-8a-methyl-1,6-(2H,7H)-naphthoquinone for the first time through asymmetric Robinson cyclization reaction under conventional conditions or microwave irradiation conditions. Under proper power, an L-prolinamide type catalyst can keep excellent catalysis performance and the catalysis reaction time isshortened; compared with room-temperature stirring conditions, the synthesis efficiency is greatly improved. The molecular collision is aggravated through the microwave radiation and an intermediatecan more easily pass through an energy barrier to form a transition state, so that the reaction time is remarkably shortened, the preparation efficiency of the (S)-(+)-3,4,8,8a-tetrahydro-8a-methyl-1,6-(2H,7H)-naphthoquinone is greatly improved and the synthesis period is shortened. The method is low in cost, simple and rapid, high in yield and good in stereoselectivity.

The invention discloses a novel wind power main bearing sealing structure, and relates to the technical field of wind power bearing protection. In order to solve the problems that in the prior art, acheck ring used for sealing and arranged on a wind power main bearing is inconvenient to mount and disassemble, mass production is not convenient and the production cost cannot be reduced, the structure comprises a bearing outer ring, a bearing inner ring and a plurality of balls. The bearing inner ring is movably sleeved with the bearing outer ring, and the balls are arranged between the bearingouter ring and the bearing inner ring. The outer wall of the front side of the bearing outer ring and the outer wall of the back side of the bearing outer ring are each provided with a first mountingblock in a welding mode, and movable plates are rotationally connected with the sides, away from the bearing outer ring, of the first mounting blocks. First limiting mechanisms are arranged between the movable plates and the first mounting blocks. By means of the structure, a sealing plate can be quickly assembled and disassembled conveniently. Besides, the whole device is simple in structure andeasy to obtain, easy mass production can be achieved, and the production cost is reduced. The whole device conveniently provides anti-collision protection for a bearing, and damage to the bearing dueto external force touch is avoided.

The invention provides a parallel-shaft output reducer bending rigidity testing system, and relates to the technical field of mechanical transmission. The parallel-shaft output reducer bending rigidity testing system comprises a test board, a test piece, a loading system, a pressure sensor and a displacement detection assembly. The test board is used for fixedly installing the reducer. The test piece can be fixed with the output end of the reducer. At the moment, the loading system can push the test piece to enable the test piece and the output end of the reducer to slightly swing. The pressure sensor is used for detecting the pressure between the test piece and the loading system, and the pressure at the moment is the radial force applied to swing of the test piece by the loading system.The displacement detection assembly is used for detecting the displacement variation of the preset position of the test piece when the test piece swings.

The invention discloses an exhaust gas treatment device simple in structure and easy to obtain. The exhaust gas treatment device comprises a filter tank body, an air guiding pipe, a cooling component,a suction component and an air outlet pipe. The air guiding pipe extends into the filter tank body, and an orifice of the air guiding pipe is located on the lower portion of the filter can body. Thecooling component is of a tubular structure wound around the side of the filter tank body. The air outlet pipe is in communication with the filter tank body, and the suction component is located at the orifice position of the air outlet pipe. The exhaust gas treatment device is simple in structure, easy to obtain and capable of condensing exhaust gas first, thereby effectively enhancing the treatment effect. The exhaust gas is filtered with water or other liquids, so that harmful substances can be eliminated effectively, and discharge of clean gas is ensured.

The invention provides an automatic folding and unfolding safety fence for a lifting machine. The automatic folding and unfolding safety fence for the lifting machine comprises a plurality of stand columns, a carriage frame and a lifting mechanism. The multiple stand columns are vertically arranged. The carriage frame is arranged among the stand columns. The lifting mechanism is connected with the carriage frame. The automatic folding and unfolding safety fence further comprises a fence body and stop blocks. Each stand column comprises a stand column body and a fence guide rail, wherein the fence guide rail is arranged on the outer side of the stand column body. The fence body comprises a main fence body and a fence guide shoe which is arranged on the outer side of the main fence body and abuts against the fence guide rails. The stop blocks are arranged on the side, close to the carriage frame, of the main guide rail body. The automatic folding and unfolding safety fence for the lifting machine solves the technical problems that a fence in the prior art is complex in opening and closing operation, and an automatic opening and closing system is high in cost and unstable in running.

The invention discloses an enzyme-linked immunosorbent assay for indirectly detecting pirimiphos-methyl. An artificial antigen obtained by coupling bovine serum albumins with 2-diethylamino-6-methyl-4-pyrimidinol is used as an immunogen, and an artificial antigen obtained by coupling chicken ovalbumins with 2-diethylamino-6-methyl-4-pyrimidinol is used as a coating antigen. An experimental animalis immunized by virtue of an artificial immunogen, and an antibody specifically aiming at pirimiphos-methyl hydrolysate is generated by the body of the animal and is capable of specifically recognizing the pirimiphos-methyl hydrolysate, namely the 2-diethylamino-6-methyl-4-pyrimidinol and can be used for indirectly determining the content of the pirimiphos-methyl in foods after hydrolysis of raw farm chemicals. According to the method, the detection limit is 3.2ng/mL, the 50% inhibiting concentration (IC50) is 23.42ng/mL, the linear detection range is 6.09ng/mL-90.07ng/mL, and the curve correlation coefficient is 0.9996. The method is high in specificity, high in sensitivity, simple and convenient and has a wide application prospect in residue detection of the pirimiphos-methyl in foods.

The invention relates to the field of preparation of zeolite molecular sieves, and aims to provide a method for synthesizing an aluminum-rich * MRE zeolite molecular sieve in one step by using an organic template agent. The method comprises the following steps: firstly, mixing a silicon source with deionized water and a diethyldimethylammonium hydroxide aqueous solution, then adding an aluminum source, and finally adding solid sodium salt and potassium salt; fully stirring for 12 hours and then putting the mixture into a reaction kettle; and carrying out a crystallization reaction at 160-200 DEG C for 24-168 h, washing the reaction product with deionized water, and drying the reaction product at 80 DEG C for at least 12 h to obtain the aluminum-rich * MRE zeolite molecular sieve. Accordingto the invention, cheap diethyldimethylammonium hydroxide is used as an organic template agent to synthesize the aluminum-rich * MRE zeolite molecular sieve in one step, the crystallization time is short, and the method has important significance in the field of actual chemical production. The minimum silica-alumina ratio of the obtained aluminum-rich * MRE zeolite molecular sieve can reach 19.2,so that enough acid strength can be provided for the reaction.