254 results about "Double teeth" patented technology

This invention discloses a method for preparing double-metal cyanide complex supported catalyst and its application. The composition is : S-M11a[M(CN)BL1c]íñxM11X2íñy1L2íñy2L3.zH2O, wherein, S is the carrier, and is SiO2, TiO2 or their mixture; M11 is divalent metal ion; M is divalent, trivalent or valency-changeable metal ion; X is halogen anion or analog of halogen anion; L1 is high molecular or low molecular mono-tooth or double-tooth ligand of M; L2 is water-soluble alcohol or cyclic ether; L3 is water-soluble or alcohol-soluble compound, and can be high molecular or low molecular mono-tooth or double-tooth ligand; a and b are positive integers; c is 0 or positive integer; x, y1, y2 and z are 0 or positive numbers. The catalyst is stable in air, and is insensitive to water vapor. The catalyst can be adequately utilized due to supporting, and can be easily removed from reaction products.

The invention relates to a method for the simulation analysis on the meshing stiffness of a cylindrical spur gear undergoing damaged single-tooth failure. The method comprises the following steps: firstly, setting the correction coefficient of the meshing stiffness of single-tooth and double-tooth meshing section on the basis of the calculation results of the average stiffness according to the finite element method and the national standard method, so as to improve the calculation accuracy of the meshing stiffness of a normal gear according to the energy method; secondly, establishing a finite element model of the spur gear undergoing damaged failure targeting on the failure location of the spur gear by combining the three-dimensional modeling software and the finite-element analysis software, and compiling a simulation calculation program by using the computer language, so as to calculate the time-varying meshing stiffness; and finally, integrating the calculation results of the two steps to obtain the integrated meshing stiffness of the spur gear. By fully integrating the advantages of the corrected energy method and the finite element method, the invention can not only guarantee the calculation accuracy, but also improve the calculation efficiency. The method of the invention for the simulation calculation of the meshing stiffness of the gear undergoing damaged single-tooth failure is effectively applicable in the research on the vibration response mechanism of a gear system.

The invention relates to a mixed type driving and driven magnetic suspension bearing, which solves the problems of large volume, heavy weight and high temperature rise of the conventional magnetic suspension bearing. Two circular ring-like rotor permanent magnets are sleeved on an outer surface of a rotor magnetically-conductive yoke cylinder along axial direction; an inner surface of a stator iron core is grooved along the axial direction to form 4n stator teeth; two tile-shaped stator permanent magnets are fixedly adhered to the inner surfaces of the first, third, ..., and (4n-1)th stator teeth along the axial direction; the position of each stator permanent magnet corresponds to that of one of the circular ring-like rotor permanent magnets; the second, fourth, ..., and 4nth stator teeth are armature teeth in a double-teeth structure; a coil is wound on each tooth in the double-teeth structure; the coils on all armature teeth are connected in series to form a radial force control winding; and two coils on two teeth which are opposite by 180 degrees in circumference are connected in series in reverse direction to form a set of windings. By the invention, the dynamic response of the bearing is improved.

The invention discloses a compound crusher. The compound crusher comprises a housing. A material distribution device is fixed to the top of the housing. A material outlet is arranged at the bottom of the housing. A double-tooth roller structure for coarse crushing is installed in the housing. The double-tooth roller structure comprises a pair of parallel tooth rollers. The parallel tooth rollers comprise a front tooth roller and a rear tooth roller. An invertible impacting hammer structure for fine crushing is installed under the double-tooth roller structure in the housing. The invertible impacting hammer structure comprises a pair of rotors parallel to the tooth rollers. The rotors comprise a front rotor and a rear rotor. Impacting hammers are fixed to the rotors. Impacting plates are arranged at two sides of the rotors. A material guide cone is arranged between the tooth rollers and the rotors on the perpendicular bisector of the two tooth rollers. The compound crusher realizes coarse crushing and fine crushing two-stage operation, reduces an investment cost and an operation cost of equipment, has a large volume, is environmentally friendly, does not produce raised dust, prevents bonding and blocking, and is convenient for fast maintenance.

The invention belongs to the technical field of a vanadyl complex catalyst and particularly relates to an immobilization double-tooth Schiff base vanadyl complex catalyst as well as a preparation method and an application method thereof. The preparation method comprises the following steps: firstly, bonding double-tooth Schiff base genin on crosslinked polystyrene microspheres; and then performing the coordinating chelation reaction to the microspheres and vanadyl sulfate to prepare the crosslinked polystyrene microsphere immobilization double-tooth Schiff base vanadyl (IV) complex catalyst. According to the invention, a homogeneous catalyst is changed into a heterogeneous vanadyl (IV) complex catalyst; not only are the activity and the selectivity of the homogeneous catalyst reserved, but also a series of advantages are brought in, for example, the thermal stability of the catalyst is improved, the catalyst is convenient to separate from a reaction medium, and the catalyst is reused;and the efficiency of the catalyzing process is greatly promoted.

The invention relates to a novel double-stator low-pulsating-torque stepping motor which mainly comprises a motor rotating shaft, an inner stator sleeve, an inner stator core, an inner stator winding, hollow cup-shaped rotors, an outer stator core, an outer stator winding and a driving and control circuit. The inner stator core and the outer stator core of the motor are coaxial, inner stator teeth and outer stator teeth are staggered by a certain angle in space, and the inner stator winding and the outer stator winding are three-phase symmetry windings respectively. The hollow cup-shaped rotors of the motor are the inner and outer double-tooth rotors, the positions of the axes of inner and outer double teeth are aligned in space, and the hollow cup-shaped rotors are coaxially arranged in gaps of the inner stator core and the outer stator core. Voltages applied to the corresponding three-phase symmetry windings of an inner stator and an outer stator of the motor have a certain phase difference in time, pulsating torque components in solenoid driving torques formed by the inner stator winding and the outer stator winding on the hollow cup-shaped rotors have a 180-degree phase difference, the pulsating torque can be well restrained after overlapping is carried out, and the operation performance of the stepping motor can be improved.

A double teeth ball screw device includes an elongated screw shaft and a ball nut each having two parallel helical grooves aligned with each other for forming two parallel ball guiding passages between the screw shaft and the ball nut, the ball nut includes two parallel and axially and oppositely extended channels communicative with the ball guiding passages for forming an endless multiple-turn, helical raceway between the screw shaft and the ball nut and for receiving a number of ball bearing members and for facilitating the sliding movement between the screw shaft and the ball nut, a deflecting device is attached to the ball nut for communicating the ball guiding passages with the channels of the ball nut.

The invention provides a greening method for preparing aldehydes and ketones through the alcohol oxidation of a copper catalyst. The greening method comprises the following steps: taking copper salt as the catalyst, a single-tooth or double-teeth N ligand as the ligand and an organic nitric oxide compound as a co-catalyst, and performing the alcohol aerobic oxidation reaction in water-phase or organic solvent under the existence of alkali and air to prepare an aldehyde and Ketone compound. A copper catalyst system, which is low in cost, easy to obtain, low in toxicity and high in activity, is adopted in the greening method, air is used as an economic, safe and green oxidant, and under the mild condition of the indoor temperature air, the aldehyde and ketone compound is prepared through effective alcohol oxidation. The reaction condition is simple and mild, the operation is easy, the reaction conversion rate is high, the product separation and purification are simple, and the recovery rate is high. The requirement on the reaction condition is relatively low, and the greening method has a good research and industrial application prospect.

The invention discloses an electric dissecting device for an operation of dissecting bones, which is provided with a cutter component, a clamp component, a handle component and a motor component, wherein the cutter component is provided with an inside cutter and an outside cutter which are movably connected with each other in a fit mode; the outside cutter of the cutter component is in matched connection with the clamp component which is in matched connection with the handle component; the motor component is arranged in the handle component; the inside cutter of the cutter component is in matched connection with the motor component; and the head of the cutter component adopts one of a flat cutter head, a double-tooth cutter head, a spherical cutter head and a tooth form cutter head. Compared with the prior art, the electric dissecting device has the advantages of simple and reasonable structure, convenient operation, complete functions, convenient assembly and disassembly, reliable connection, no clearance in rotation, and convenient cleaning and disinfection after surgeries.

The invention discloses a warm compression thermal therapy liquid for treating rheumatoid arthritis, postpartum rheumatism, scapulohumeral periarthritis, lumbar muscle degeneration, sciatica, lumbar vertebra pain, cervical vertebra pain, hemiplegia and stroke. The warm compression thermal therapy liquid is mainly prepared from double-teeth pubescent angelica root, wild ginger, himalayan teasel root, dandelion, longhairy antenoron herb, fortune's drynaria rhizome, Chinese taxillus twig, astragalus, cortex eucommiae, scorpio, red paeony root, white paeony root, orientvine, prepared rehmannia rhizome, achyranthis bidentatae, large-leaved gentian and red-rooted salvia root according to a certain weight proportion. A preparation method of the warm compression thermal therapy liquid comprises the following steps of: preparing the selected Chinese medicines, extracting, purifying and smashing with a smasher; and applying according to three kinds of methods. The warm compression thermal therapy liquid has the effects of clearing and activating the channels and collaterals, regulating tendons and qi, dispelling cold and drawing poison out, can be used for quickly improving microcirculation and enhancing the immunologic function and temperature resistance of an organism, is applied to treatment of a plurality of incurable miscellaneous diseases such as rheumatoid arthritis, scapulohumeral periarthritis, postpartum rheumatism, sciatica, cervical vertebra lumbar vertebra pain, hemiplegia and stroke and the like, and has quick response and a high curative rate.

The invention discloses a bone fracture medicinal patch and a preparation method thereof, which belong to the field of external Chinese patent medicaments. The bone fracture medicinal patch comprises a Chinese medicinal formula, a substrate material, a back lining layer and a supporting layer, wherein the formula consists of the following components in parts by weight: 10 parts of Chinese angelica, 10 parts of szechuan lovage rhizome, 10 parts of common bletilla tuber, 10 parts of ground beetle, 20 parts of pseudo-ginseng root, 10 parts of cortex eucommiae, 10 parts of tree peony root-bark, 20 parts of sappan wood, 10 parts of suberect spatholobus stem, 20 parts of fortune's drynaria rhizome, 10 parts of himalayan teasel root, 20 parts of astragalus, 20 parts of sealwort, 10 parts of double-teeth pubescent angelica root, 20 parts of frankincense, 80 parts of myrrh, 20 parts of safflower, 20 parts of twotooth achyranthes root, 5 parts of native copper, 2 parts of dragon's blood, 20 parts of common selfheal fruit-spike, 20 parts of fenugreek seed, 20 parts of epimedium herb, 20 parts of south dodder seed, 10 parts of ainsliaea, 10 parts of corydalis tuber, 10 parts of peach kernel, 10 parts of common burreed rhizome and 10 parts of curcuma zedoary. The preparation method comprises the following steps of: preparing Chinese medicinal fine powder; preparing an extract; preparing a substrate material; preparing paste; and making a plaster. The bone fracture medicinal patch has the effects of relieving pain, stopping bleeding, diminishing swelling quickly and healing quickly, is free from harmful substances such as mercury, lead and the like, is nonirritant, is non-allergic to skin, does not pollute skin, is easy to strip, can be removed and stuck repeatedly, does not hurt hairs, and is mainly applied to patients with bone fractures and bone fracture injuries and whose tendons and bones are manually straightened or set, or people for which poroma is not formed a long time after bone fractures.

The invention relates to a method for measuring variable stiffness in the process of gear mesh. A state, between single-tooth and double-tooth alternative mesh critical states, of two gears serves as a mesh measurement period, and a formula (see the instructions) in one mesh measurement period is marked as a rotation angle of a pinion, wherein the epsilon is a gear contact ratio, Zp is the number of teeth of the pinion, i can be anyone in 1, 2, 3..., 10, the marked rotation angle thetai of the pinion serves as a measuring position, and stiffness values Ki at all measuring positions of the pinion are connected to obtain a meshing stiffness in one mesh measurement period of the gears. By means of the method for measuring the variable stiffness in the process of gear mesh, the variable stiffness in the process of gear mesh can be rapidly measured, the practical measurement efficiency can be greatly improved, test time is saved by setting the mesh measurement period and determining the measuring points, a rapid and effective verification test is provided for the design of gears, more importantly, the efficient measuring method even proximate to the production rhythm is provided for manufacturing enterprises, and the method is suitable for being applied to mass production.

The invention relates to the technical field of medical health care products, in particular to wax mud for wax therapy and a preparation method of the wax mud. The wax mud is prepared from beewax 1, microcrystalline wax, rosin, vaseline, far-infrared ceramic powder, volcanic mud, stone needle powder, horse oil, rose essential oil, chamomile essential oil, peppermint essential oil, wintergreen oil, eucalyptus leaf oil, argy wormwood leaf essential oil, benzoic acid, azone, heat storage agents and Chinese traditional medicinal powder. The Chinese traditional medicinal powder is prepared from safflower flowers, Chinese angelica roots, rhizoma drynariae, roots and rhizome of medicinal rhubarb, peach seeds, common peony roots, rhizoma Chuanxiong, suberect spatholobus stems, sixpetal clematis roots, rhizoma corydalis, tuberculate speranskia herbs, cassiabarktree barks, crude Sichuan aconite roots, radix aconiti, camphor, white mustard seeds, notopterygium roots, double-teeth pubescent angelica roots, borneol, earthworm, common floweringquince fruits, centipede, whole worm, unprocessed rhizoma arisaematis, unprocessed rhizoma pinellia, dried bodies of ground beetle, zaocys dhumnades, hairy orientvine stems, processed nut-vomitive poisonnut seeds, olibanum, myrrh, siebold wildginger herbs and root leaves or flowers of common threewingnut. Raw materials in the wax mud achieve synergistic effects, so that the wax mud has good heat-insulating property and flexibility, and medical components have high permeation and transdermal absorption performances and remarkable medicine efficacy.

The invention discloses a driving mechanism for a reactor control rod of a nuclear power plant. The driving mechanism for the reactor control rod of the nuclear power plant comprises a pressure-resistant shell assembly, a falcula assembly, a driving rod assembly, a coil assembly and a rod position detector assembly, wherein the pressure-resistant shell assembly is an integrated shell, the top of the pressure-resistant shell assembly is of a blind pipe structure, and the bottom of the pressure-resistant shell assembly is connected by virtue of a screw thread and is detachably arranged on a CRDMpipe socket of a pressure vessel head in a sealing manner. Compared with the prior art, the driving mechanism for the reactor control rod of the nuclear power plant adopts the integrated pressure-resistant shell assembly, no weld joint is formed on the pressure-resistant shell assembly, and the pressure-resistant shell assembly and the CRDM pipe socket are connected by adopting the screw thread and are sealed by virtue of a pair of sealing rings, so that the risk of reactor coolant leakage can be effectively reduced. Besides, the falcula assembly adopts a double-tooth falcula structure, the wear resistance of a falcula can be greatly improved, the service life of a control rod driving mechanism is prolonged, the falcula assembly is assembled and disassembled from the bottom of the pressure-resistant shell assembly, and irradiation injury risk produced to operating personnel can be reduced.

The invention discloses a shaft coupling, which comprises a first shaft sleeve, a second shaft sleeve and an elastomer arranged between the first shaft sleeve and the second shaft sleeve, wherein the elastomer comprises a plurality of elastic elements, and each elastic element is detachably arranged between the first shaft sleeve and the second shaft sleeve. The shaft coupling is provided with the split-type elastomer, and has convenient installation; the entire elastomer does not need to be replaced after being damaged, and the damaged part only needs to be replaced, so the maintenance is very convenient, and the cost can be saved for customers; in addition, the elastic element arranged between the two adjacent claw-shaped teeth of each shaft sleeve has good vibration reducing performance; and because the elastic element adopts a double tooth structure and is arranged in an axial inserting way, the tight structure can not only transmit torque, but also effectively compensate for installation deviation and absorb vibration and shock load.

The invention discloses a multi-spraying-head 3D printer. The printer comprises a printing platform lifting device, a double-tooth-belt horizontal moving device, a material box, a multi-spraying-headmount and a printer frame; the printing platform lifting device is mounted on the printer frame, and connected with the double-tooth-belt horizontal moving device, and the double-tooth-belt horizontalmoving device is connected with the multi-spraying-head mount; and the material box is mounted on the printer frame, and connected with the multi-spraying-head mount through material supply pipes. The multi-spraying-head 3D printer has the advantages that moving strategies in the X, Y and Z directions are provided by adopting the mode that a servo motor is connected with tooth belts; spraying heads can be automatically switched in the whole printing process by adopting the design that the multiple spraying heads are arranged on a spraying head fixing disc, and thus the production efficiency is improved; and the design demand is ensured, the structure is simple, the number of the spraying heads can be deployed according to practical needs, the spraying heads are mounted rapidly, errors areavoided, and the printing quality is ensured.

The invention relates to a medicinal lotion for treating female vaginal discharge diseases and a preparation method thereof. The medicinal lotion is prepared from the following Chinese medicinal bulk pharmaceuticals in parts by weight: 16-22 parts of paris rhizome, 18-24 parts of selinum japenious seed, 12-18 parts of pepper, 2-6 parts of menthol, 10-16 parts of jasmine, 3-9 parts of gorgon euryale seed, 3-7 parts of tuber fleeceflower root, 4-10 parts of areca nut, 18-26 parts of virgate wormwood herb, 15-21 parts of lightyellow sophora root, 6-10 parts of double-teeth pubescent angelica root, 13-19 parts of sessile stemona root, 8-12 parts of figwort, 13-19 parts of honeysuckle flower, 12-18 parts of belvedere fruit, 6-10 parts of cortex dictamni, 14-20 parts of golden larch bark, 11-17 parts of baikal skullcap root, 6-12 parts of red paeony root, 11-17 parts of Chinese mugwort leaf, 9-13 parts of grassleaf sweelflag rhizome, 10-16 parts of amur corktree bark and 10-18 parts of Chinese atractylodes. The medicinal lotion is used for treating female vaginal discharge diseases, is convenient to use, has a definite curative effect, and is free from remarkable toxic and side effects.

The invention discloses an internally-engaged gear pump applicable to high pressure and large flow. The internally-engaged gear pump is composed of a pump shell, a first double-tooth ring, a second double-tooth ring, a first gear shaft, a second gear shaft, a radial compensation device, a sliding bearing, a side plate and the like, wherein the first double-tooth ring and the second double-tooth ring are symmetrically arranged in the pump body, and outer teeth of the first double-tooth ring and the second double-tooth ring are engaged to form a first gear pair; the first gear shaft and the first double-tooth ring are engaged to form a second gear pair; and the second gear shaft and the second double-tooth ring are engaged to form a third gear pair. A single input shaft is used for driving the gear pairs to rotate by grades and the distribution of moment on the shaft is reasonable; and the radial unbalance force on each grade of gear pair is small and the anti-pressure ability of the pump under a high pressure working condition is improved. Oil in the pump is pressurized by the plurality of grades of gear pairs so that the output pressure and the flow of the oil are effectively improved; and meanwhile, the two paths of oil on the outlet of the pump are overlapped so that the flow and the pressure pulse of the pump are remarkably reduced and the requirements of a high-precision hydraulic system can be met.

The invention discloses a plaster for treating cervical spondylosis and lumbar spondylosis, which belongs to the field of medicinal compositions for treating cervical spondylosis and lumbar spondylosis. The plaster is prepared from the following Chinese medicines in parts by weight: 5-10 parts of pericarpium zanthoxyli, 5-10 parts of hot pepper, 5-10 parts of white mustard seed, 3-8 parts of dragon's blood, 3-10 parts of double-teeth pubescent angelica root, 4-8 parts of the larva of silkworm with botrytis, 4-10 parts of lead powder, 3-8 parts of pseudo-ginseng, 3-8 parts of paris polyphylla, 4-10 parts of rhodiola rosea, 4-8 parts of scorpio, 4-10 parts of thunder god vine, 3-8 parts of safflower, 3-8 parts of vermilion and 2-4 parts of musk. The plaster has precise prescription compatibility, can be used for integrally improving various pathological changes of cervical vertebra and lumbar vertebra, and has good pain relieving and treating effects on cervical vertebra and lumbar vertebra; and the plaster has the advantages of short treatment course, quick response, freeness from toxic and side effects, high curative ratio and high popularization value.

The invention provides an axial positioning device of a crushing roller, which relates to a crushing machine and solves the problems that in the prior art, the installation and the maintenance of the crushing roller are difficult, and the equipment operation reliability is poor. The axial positioning device comprises high-strength locking screw nuts, a plurality of high-strength round head propping and pushing screws and two high-strength propping and pushing gaskets, wherein the circumferential rings of the two end surfaces of the high-strength locking screw nuts are provided with a plurality of threaded holes, the two locking screw nuts are respectively matched and connected with external screw threads of the fixing end and the floating end of a roller shaft, one propping and pushing gasket is arranged between the locking screw nuts and a bearing arranged at the floating end, the other propping and pushing gasket is arranged between the locking screw nuts and a No. IV isolation ring, and the round head propping and pushing screws are connected with the threaded holes arranged on the end surfaces of the locking screw nuts. The axial positioning device is used for the axial positioning of the crushing roller of a double-tooth roller crushing machine, the service life of parts can be prolonged, in addition, the installation and the maintenance can be conveniently and fast carried out, and the production efficiency of equipment is greatly improved.

The invention relates to a double-tooth roller red coke crusher, which is characterized in that a motor is arranged on a stander, an output shaft of the motor is in transmission connection with an input shaft of a speed reducer by a pin coupling, an output shaft of the speed reducer is in transmission connection with a composite speed reducer by a drum-shaped gear coupling, the composite speed reducer is in transmission connection with a tooth roller shaft by a connecting shaft sleeve, the tooth roller shaft is connected with a four-bolt column bearing pedestal, the end of the tooth roller shaft is provided with a water cooling device, and a liner plate is arranged on the top of the tooth roller shaft. The double-tooth roller red coke crusher has the characteristics of being compact in structure, flexible in distribution, reasonable in a material crushing mechanism, high in adaptability and the like, is used for crushing the material by the synthetic action such as shearing, bending and extruding, is more reasonable in the crushing mechanism compared with a common roller type crusher, is even in force applied to crushing teeth, is large in allowed material feed dynamics, and is particularly suitable for coarse crushing. A crushing roller is low in rotation speed, small in wear, low in noise, and small in dust. After an integrated structure is adopted, the driving speed reducer is directly connected with a frame of the crusher, so that the force transmitted on a base is greatly reduced, and the equipment is small in vibration.

The invention discloses massaging paste based on Chinese medicinal herbs, which is used for treating neck, shoulder, waist and leg pain, numbness of the limbs and gynecological diseases. The massaging paste comprises a Chinese medicinal material and a substrate, wherein the Chinese medicinal material is prepared from the following components in certain parts by mass: frankincense, elderberry, ipomoea cairica, garden balsam stem, honeysuckle flower, pseudo-ginseng, Chinese thorowax root, leech, stiff silkworm, scorpio, uncaria, puncturevine caltrop fruit, cochinchina momordica seed, ground beetle, astragalus, myrrh, caulis erycibes, bitter orange, tree peony bark, large-leaved gentian, turmeric root-tuber, white paeony root, suberect spatholobus stem, double-teeth pubescent angelica root, kadsura coccinea, artemisia anomala, garden balsam, dahurian angelica root, rhubarb, clove, wild ginger, szechuan lovage rhizome, belvedere fruit, cowherb seed and the like. The massaging paste is simple and practical, and can be used for treating neck, shoulder, waist, leg and foot pain, breast, cyst, numbness of the limbs and gynecological diseases during massaging; and meanwhile, the invention further provides a preparation method.

The invention discloses an intelligent control double-meshing automobile gear precision detection system which is mainly composed of a power source, a master control computer, a touch screen, an automatic workpiece conveying device and a double-tooth meshing instrument. The master control computer is respectively connected with the touch screen, the conveying device and the double-tooth meshing instrument. The double-tooth meshing instrument further comprises a device used for testing and building a tight meshing position between a standard gear and a workpiece to be tested through a spring type approaching device, and the device is provided with a displacement sensor and a high-precision standard test wheel. According to the intelligent control double-meshing automobile gear precision detection system, the accurate control over double-tooth measurement can be achieved by means of gear meshing between the high-precision standard test wheel and the workpiece to be tested through the master control computer and the high-precision sensor, manual interference and errors are reduced, detection accuracy is improved greatly and good applicability is achieved.