136results about How to "Uniform mass distribution" patented technology

A barycenter regulation device of applied load on air-float rotary platform consists of XOY planar base plate, bolt set on area center of XOY planar base plate, nub being set on bolt and being used as balance weight of barycenter regulation .It can be used to regulate integral center of planar base plate to be at barycenter of XYZ 3D volume after various parts of analog aerobat are set on XYZ 3D planar base plate.

The invention relates to a swing support for an automobile unit, which has a support arm (2), a first bearing (3) connected to the unit end of the support arm (12), and a support arm (2) body or vehicle The second bearing (4) connected to the frame end. A vibration damper (11) is arranged between each bearing core (10) of the bearing (3,4) and the bearing outer ring (9,14), wherein the second bearing (4) is made as a split bearing, which It has two bearing cores (10), and at least one bearing outer ring (9, 14).

The invention provides a power train of a new energy electric vehicle and belongs to the field of new energy vehicle application. The power train comprises a controller, a motor and a decelerator connected with the output end of the motor, wherein the controller comprises a main control panel, as well as a DC/DC converter and a high pressure controller which are connected with the main control panel; the output end of the main control panel is connected with the input end of the motor; and the DC/DC converter is connected with the high pressure controller. The power train has the following beneficial effects: the space is fully utilized reasonably, mass distribution is balanced, part layout and directions of high-voltage and low-voltage wiring harnesses are optimized, the power train and the whole vehicle can be favorably maintained, and the assembly and maintenance workloads are reduced; and parts can be quickly produced and replaced, and the mounting accuracy and speed of the whole vehicle are improved.

The invention discloses a foam sandwich composite material for an aviation dining car and a preparation method of the foam sandwich composite material. The preparation method of the foam sandwich composite material mainly comprises the steps of preparation before laminating, reinforcing material laminating, glue injection system arranging, vacuum system arranging, air tightness inspecting, resin pouring and solidification demolding. According to the preparation method, holes and grooves are formed in foam cores of reinforcing material laminating layers, and the holes and the grooves communicate with one another; and after vacuumizing is conducted, resin is poured, and complete wetting of the reinforcing material laminating layers is ensured. The prepared composite material is stable in quality, high in production efficiency, low in cost, small in pollution, good in strength and interference bonding performance, and long in service life.

An electromagnetic positioning vibration isolation platform comprises a base, a working platform, an acting force output system, an acceleration measuring unit, a position measuring unit and a controller; three groups of biaxial electromagnetic exciters form the acting force output system; the biaxial electromagnetic exciters consist of first working parts and second working parts; the first working parts comprise permanent magnets and magnet yokes; the permanent magnets and the magnet yokes form closed magnetic circuits; the magnet yokes are fixed together with a working platform; the second working parts comprise circuit boards and coil brackets; the coil brackets are fixed together with the base; the circuit boards are fixed on the coil brackets; coils are arranged on the circuit boards; the coils are positioned within the closed magnetic circuits; all magnetic force lines that penetrate through the coils have same directions; the coils comprise (i)x(/i)-direction lorentz force generation parts and (i)z(/i)-direction lorentz force generation parts; current directions of all leads in the (i)x(/i)-direction lorentz force generation parts are as same as each other; and current directions of all leads in the (i)z(/i)-direction lorentz force generation parts are as same as each other. The electromagnetic positioning vibration isolation platform has the advantages that each component is simply mounted and placed and the micro acceleration speed can be measured and controlled.

A large wide airliner multi-position maintenance hangar roof diagonal truss structural system comprises roof bearing columns arranged along three edges of a hangar at intervals and a roof steel structure fixed to the tops of the roof bearing columns and further comprises gate truss bearing columns arranged along the open edge of the hangar and a gate truss fixed to the tops of the gate truss bearing columns. The roof steel structure is connected with the gate truss, the hangar comprises a single-span hangar body and a multi-span hangar body, the roof steel structure comprises a main structural frame covering the hangar and further comprises a diagonal truss and a linear truss which are arranged in the main structure frame, and the linear truss intersects with the diagonal truss. Based on the shortest transfer path theory of force, the diagonal truss and the linear truss are arranged in the hangar, a roof is divided and surrounded, the pressure of the gate truss is effectively relieved, and it is possible to implement the ultralow-airspace height-limited-place ultra-large-span multi-position maintenance hangar.

The invention discloses a fuel cell cathode catalyst layer structure capable of enhancing catalyst durability, and relates to the technical field of fuel cells. The fuel cell cathode catalyst layer structure comprises a first catalytic part, a second catalytic part and a third catalytic part which are sequentially arranged in the direction from an area close to a diffusion layer side to an area close to a proton exchange membrane side; pure platinum catalysts are arranged in the first catalytic part, the second catalytic part and the third catalytic part; the platinum loading capacities of thepure platinum catalysts in the first catalytic part, the second catalytic part and the third catalytic part are sequentially decreased; the average particle sizes of the pure platinum catalyst particles in the first catalytic part, the second catalytic part and the third catalytic part are sequentially increased; the large-particle-size pure platinum catalyst is more corrosion-resistant, and thesmall-particle-size pure platinum catalyst improves the initial performance of the fuel cell, so that the loss of the specific surface area of the catalyst under potential scanning is conveniently reduced; and the attenuated cathode catalyst is more uniform in platinum specific surface area and platinum mass distribution, so that the attenuated oxygen and proton mass transfer loss is reduced, theperformance of the attenuated fuel cell is improved, and the durability is improved.

The invention discloses a center shaft structure of a delta robot and belongs to the technical field of mechanical equipment. The problems that inertia is high, efficiency is lower and operation accuracy is reduced due to the fact that the center shaft structure of an existing delta robot is large in structural weight are solved. The center shaft structure of the delta robot comprises at least two robot driving arms and at least one robot operation arm, the robot driving arms are parallel, one ends of the robot driving arms are fixedly connected together via a fixing sleeve, the other ends of the robot driving arms are fixedly connected with a first slider, one ends of the robot operation arms penetrate the first slider, the robot operation arms can slide relative to the slider along the self axial direction, and both the robot driving arms and the robot operation arms are made of carbon fiber materials. The center shaft of the delta robot is simple in structure and light in weight, thereby being low in inertia and high in efficiency when in running.

The invention relates to a self-advancing type high-pressure jet sprayer for radial horizontal well drilling, which mainly comprises a shell, a turbine rotor, wear-resistant steel balls, a baffle plate and the like. The self-advancing type high-pressure jet sprayer is technically characterized in that a tip, a forward spray nozzle and a backward spray nozzle are processed on the shell, hard alloy is welded on the outer surface of the shell, the turbine rotor is mounted in the shell, spherical grooves are processed at the upper end and the lower end of the turbine rotor, the turbine rotor is positioned via the upper wear-resistant steel ball and the lower wear-resistant steel ball, the upper wear-resistant steel ball is placed between the inside of the shell and the corresponding spherical groove of the turbine rotor, the lower wear-resistant steel ball is placed between the turbine rotor and a spherical groove on the baffle plate, the shell is connected with the baffle plate in a threaded manner, and four to six water injection holes are uniformly distributed on the baffle plate. The self-advancing type high-pressure jet sprayer is simple in structure and reliable in work, and can be widely applied to radial horizontal well drilling operation.

The invention provides a mini-type driver. The mini-type driver comprises a shell, a motor, a transmission mechanism, an output shaft, a circuit board and a control line, wherein the motor drives the output shaft through the transmission mechanism to output power; the output shaft comprises a hollow shaft section and is provided with a ring piece electric brush; one end of the control line is connected with the circuit board; and after the other end of the control line is rotationally and electrically connected with the ring piece electric brush to be switched, the other end of the control line penetrates through the output shaft and is led out of the shell via the hollow shaft section. The mini-type driver is compact in structure, simple in line arrangement, high in reliability and small in mechanical transmission error; after the control line inside the mini-type driver is rotationally and electrically connected with the ring piece electric brush to be switched, the line arrangement operation is greatly simplified, so that the line arrangement problem of the control line is not considered during design of a mechanical arm. The invention further provides a running-in device and method of the mini-type driver. The mini-type driver is stable in transmission and the working life is prolonged through secondary assembly after high-speed grinding.

The invention discloses an assembled-type cement pier anchoring system for net cage fixation. The anchoring system is composed through assembly of a main cement sunk lump, four subsidiary cement sunk lumps, a horizontal connecting baseplate, a longitudinal connecting baseplate and four rib plates, wherein the main cement sunk lump and the subsidiary cement sunk lumps are cubes, and a preformed hole is formed in the vertical center axis of the each cube; and the horizontal connecting baseplate and the longitudinal connecting baseplate are assembled into a criss-crossed baseplate structure, the main cement sunk lump is assembled at the criss-crossed center axis, and the four subsidiary cement sunk lumps are assembled on end parts of the horizontal connecting baseplate and the longitudinal connecting baseplate respectively. An anchoring system to be lifted has a large overall weight; the criss-crossed system formed through the assembly has large overall dimensions, uniform mass distribution and strong overturning resistance and can get adapted to stormy effects in random directions, and various seabed geological conditions; and construction duration on seas is very short; and large anchoring force can be provided.

The invention provides a preparation method and device of an indium antimonide single crystal, and relates to the field of crystal preparation. The preparation method comprises the following steps: adding indium antimonide seed crystals, indium antimonide polycrystals and diboron trioxide into a closed container; carrying out crystal growth by adopting a vertical Bridgman method (VB method); in this way, the crystals begin to grow from the bottom of the melt and are not interfered by dross, automation of crystal growth can be achieved by controlling a heating program, and compared with a Cz method, the method is low in requirement for technological experience of crystal pulling workers, high in finished product success rate, low in dislocation density and stable and controllable in quality. By arranging a heating area with independent temperature control above the closed container, the heat preservation effect can be achieved, materials can reach the set temperature more accurately, and the overall mass distribution of obtained crystals is more uniform.

The invention relates to a turbine rotor blade, which comprises a wing-shaped part and a blade crown part, wherein the blade crown part is formed on the free end of the wing-shaped part through generally, circumferentially and axially extending along the center of a turbine rotor, and is provided with a blade crown front edge and a blade crown back edge, wherein the blade crown front edge and the blade crown back edge are respectively in smoothly transited arc shapes. The blade crown front edge and the blade crown back edge are designed into arc shapes, the processibility of the blade crown part can be improved, and meanwhile, the weight distribution of the blade crown part can be more uniform through the arc-shaped blade crown front edge and the arc-shaped blade crown back edge, so the stress concentration effect is reduced.

The invention relates to a technology of single-casing steam turbines; a single-casing, reaction and impulse steam turbine, comprises a horizontally placed cylinder and a rotor in the cylinder; the rotor is supported by bearings in the front and in the back; the cylinder is divided into two logic parts, namely, a high-pressure part and a medium-low pressure part; the high-pressure part is provided with a plurality of reaction stages, therein each comprises a static blade and a movable blade; the static blades of the reaction-type stages are arranged on a high-pressure cylinder; the movable blades are arranged on the rotor; the medium-low pressure part is provided with a plurality of impulse stages, therein each comprises a static blade and a movable blade; the static blades of the impulse stages are arranged on a retaining ring; and the movable blades are arranged on the rotor. The high-pressure part and the medium-low pressure part are in a contraflow configuration. The inventive steam turbine overcomes the problem of insufficient rigidity of rotors with a traditional impulse design and difficult self balancing of impulse force of rotors with the traditional reaction design of single-casing three-stage reheating combined cycle steam turbine of 100MW.

The invention relates to a preparation method for solid polymer ferric sulfate zinc flocculant. The preparation method comprises the steps that firstly, solid seven-hydrate ferrous sulfate is acidized through concentrated sulfuric acid; secondly, sodium chlorate is added into the mixture and stirred slowly so that tan uniform liquid can be formed; thirdly, solid zinc sulfate is added into the liquid and mixed with the liquid to be uniform, and solid powdery zinc sulfate is added again and stirred slowly to be completely dissolved; afterwards, carbon oxidation materials are added so that the curing rate of the flocculant can be increased, and water bath heating is performed; finally, dry heating and room-temperature curing are performed through an electric jacket, so the faint yellow solid polymer ferric sulfate zinc flocculant can be obtained in a short time. According to the preparation method, none of waste liquid, waste residue and waste gas are produced in the production process; the curing rate of the product is high, mass distribution is uniform, the content of flocculation active components is high, and the flocculation effect is good, and therefore the preparation method can be applied to treatment for industrial waste water, domestic sewage, source water and the like.

The present invention provides a method and apparatus for the production of homogeneous needle coke. A pretreatment reactor equipped with a stirrer is added before a coking heating furnace; an operation mode of three-section constant temperature and two-section heating is applied to the coking heating furnace, wherein the second section of heating process uses a rapid heating operation mode with heating rate of 50-90 DEG C / h, a first section of heating process and reflux of heavy distillate oil are conducted at the same time, and the second section of heating process and reflux of intermediate distillate oil and heavy distillate oil are conducted at the same time. The present invention can significantly shorten time required for development into an intermediate liquid crystal in a coke tower, and helps full development and even distribution of the intermediate liquid crystal in the coke tower.

The invention relates to an electric automobile chassis calculus battery pack. The electric automobile chassis calculus battery pack comprises a chassis; the upper plane of the chassis is provided with battery installing grooves; the battery installing grooves are provided with calculus battery monomers; the calculus battery monomers comprise a plurality of overlapped battery monomers Ei; the calculus battery monomers are arranged on the transverse plane and the longitudinal plane of the chassis in a matrix block manner according to the shape and the size of the chassis; an A battery pack matrix is formed on the transverse plane X-Y, and a B battery pack matrix is formed on the longitudinal plane X-Z. According to the matrix arrangement of the calculus battery pack, breaking up the whole of large heavy battery monomers into parts is realized, the electric automobile chassis calculus battery pack is embedded into an electric automobile chassis, space occupied by electric automobile batteries is reduced, uniform automotive body mass distribution is realized, it is convenient for battery chassis production modularization, and convenient for automotive body modularization final assembly, and at the same time, battery safety in electric automobile body collision is improved.

The invention discloses a flexible coupling of a wind generator set and an assembling or replacing method of the flexible coupling. The assembling or replacing method is characterized by comprising the following steps: designing and manufacturing parts by unit, assembling the parts to form five unit components, namely a brake disc component, a left flexible connecting sheet component, a middle connector component, a right flexible connecting sheet component and a generator side coupling component; carrying out dynamic balance tests and adjustments of the unit components separately so that the unit components have symmetric structures and dynamically balanced configuration; assembling the unit components to form the flexible coupling; and carrying out a dynamic balance test and an adjustment of the whole flexible coupling so that the whole flexible coupling has dynamically balanced configuration. According to the invention, the parts of the flexible coupling, which are designed and manufactured by unit, can be reliably assembled and conveniently and separately disassembled and replaced, so that the problem of inconvenience caused by breakdown maintenance of the conventional flexible coupling is effectively solved, the maintenance time is greatly shortened, a great amount of maintenance cost is saved, and the flexible coupling has high practicability.