142results about How to "With carrying capacity" patented technology

The invention relates to a medium-voltage power transmission fire-resistant cable, which is characterized in that the outer fire-resistant layer of the medium-voltage cable core is made of fire-resistant inorganic fiber heat insulation layer on the inner side, and the outer side is a soft thermosetting elastomer for normal use. The composite fire-resistant and heat-insulating layer of the heat layer, the thermosetting elastomer, is composed of 30-50wt% silicon-based elastic material, 40-60wt% inorganic filler, 5-15wt% medium and low temperature frit, 4-10wt% vulcanizing agent, It is made by mixing extrusion molding and vulcanization. The composite fire-resistant and heat-insulating layer is a relatively soft sheath material when it is not exposed to flames, which can ensure good bending performance of the refractory structure in normal conditions, and quickly transforms into a shell-and-tube refractory and heat-insulating structure when it encounters fire or high temperature. In the fire-fighting environment, it can still maintain a certain period of time without being damaged, effectively preventing damage to the inner insulation caused by flames or high temperatures. When the flame temperature of the outer layer is 850°C, the temperature of the inner insulation surface is lower than 180°C. This fire-resistant and heat-insulating structure can be applied according to conventional cable production methods, and the production efficiency is extremely high.

A Mg-alloy frame made of Mg-alloy tubes and with high mechanical performance, light weight and low cost is disclosed. Said Mg-alloy tube is made up of Mg-alloy rod through removing peel, heating at 400 deg.C for 24 hr, cooling in air, heating at 300-400 deg.C for 3 hr, and hot die pressing.

The invention relates to the field of metal cutting additives, in particular to a grinding fluid for metal processing and a preparation method thereof. According to a technical scheme adopted by the invention, the grinding fluid for metal processing is composed of the following components by weight percentage: 5-15% of a PH value stabilizer, 3-5% of a surfactant, 5-10% of a water-borne lubricant,5-15% of an antirust agent, 4-8% of a coupling agent, 0.2-1% of a bactericide, 0.1-1% of a defoamer, 1-3% of a corrosion inhibitor, 0.2-0.4% of a settling agent, and the balance deionized water. The invention has the advantages that: the grinding fluid for metal processing adopts triethanolamine oleate as the surfactant, has good permeability and wettability, is conducive to entering a high temperature and high pressure working face, and at the same time is also a lubricant, the molecule has strong polar groups, can achieve strong adsorption with the metal surface, and chemical reaction can becarried out to form a firm physical absorption film and chemical reaction film with certain carrying capacity.

The invention provides a special-shaped micro stepped bearing. The special-shaped micro stepped bearing comprises a static flat plate and a moving flat plate which are paired. The static flat plate is provided with a stepped surface. The convex surface of the static flat plate is coated with an oleophylic coating. The concave surface of the static flat plate is coated with an oilphobic coating. The motion direction of the moving flat plate is that the convex surface of the static flat plate points to the concave surface of the static flat plate. A clearance between the paired static flat plate and moving flat plate is full of lubricating oil. The clearance between working surfaces of the paired static flat plate and moving flat plate is in a nanometer scale. The special-shaped micro stepped bearing is formed by the paired static flat plate and moving flat plate. The special-shaped micro stepped bearing is suitable for occasions where surface clearances of bearing inlet areas are smaller than surface clearances of bearing outlet areas, and a traditional stepped bearing cannot be suitable for the occasions. The bearing is simple in structure, easy to manufacture and low in cost, has certain bearing capacity, is provided with a good lubricating oil film and can achieve good antifriction and wear-resisting effects.

The invention provides a concentric centripetal sliding bearing formed by using interface slippage. The sliding bearing comprises a shaft and a bearing hole which are concentric, wherein a gap is formed between the shaft and the bearing hole, and the gap is filled with fluid to form a lubrication region; the lubrication region is divided into a sub region I and a sub region II, the static contact surface of the sub region Iis coated with a coating, so that the interface shear strength between the fluid and the coating is too low to enable the fluid to generate slippage on the surface of the coating, and fluid does not generate slippage on the rest static contact surface of the bearing and the whole movable contact surface of the bearing. The bearing disclosed by the invention has definite bearing capacity, is low in friction coefficient, is good in abrasion resistance, is high in support precision, is simple to realize, is low in cost, and has an important use value.

The invention provides prefabricated concrete structure plastic controllable steel joints. An upper column of the prefabricated concrete structure is docked with a lower column of the prefabricated concrete structure through a pre-embedded inner ring steel plate and a pre-embedded outer ring steel plate, and force type steel is connected between the middle of the end faces of the upper column and the lower column; a side plate of the outer ring steel plate is connected with a rectangular steel casting member through a fixing member, the rectangular steel casting member is connected with a radial spherical plain bearing, the radial spherical plain bearing is connected with a concrete beam through the steel casting member, the two sides of a box-type energy dissipation sealing plate damper are connected with the rectangular steel casting member and a steel box-type conversion beam section through bolts correspondingly, and the radial spherical plain bearing is located in the box-type energy dissipation sealing plate damper; and the steel box-type conversion beam section is connected with the concrete beam. According to the technical scheme, the whole process of construction is dry, the construction quality is easy to guarantee, and the steel joints are easy to install and detach, small in environmental pollution, controllable in structural plastic and good in shock resistance.

The invention discloses a position turning table applicable to a vehicle-mounted reconnaissance system and a mounting method of the position turning table. A static shaft and a moving shaft of the position turning table are connected through single direction thrust ball bearings, back-to-back angle contact ball bearings and angle contact ball bearings; hollow shafts and connecting plates are supported by the single direction thrust ball bearings, the back-to-back angle contact ball bearings and the angle contact ball bearings to form a position support platform. The position turning table is capable of achieving dynamic sealing through a magnetic fluid sealing ring, is good in sealing property and good in bearing capability, and the moment is also smaller than that of a conventional labyrinth seal mode; a photoelectric collector ring is adopted for signal conversion; large-diameter thrust bearings are adopted to bear a large load; an optical fiber sliding ring is adopted for optical fiber transmission, and a function can be achieved; due to addition of the filter in the position turning table, electromagnetic interference can be shielded.

The invention discloses a negative Poisson's ratio lattice structure topology optimization method considering bearing characteristics. The method comprises: firstly, using an improved SIMP interpolation function for defining the relation between the elasticity modulus and the density of a material, then solving an equivalent elastic matrix of a microstructure on the basis of an energy homogenization method, and representing the equivalent elastic matrix by using an equivalent method in allusion to the high nonlinearity of a negative Poisson's ratio expression of the structure; and finally, constructing an optimization model taking the negative Poisson ratio and the rigidity of the structure as targets, solving the topological optimization model by utilizing an improved OC algorithm, and outputting optimal unit cell configurations with different weights. According to the method, the bearing characteristic and the energy absorption characteristic of the structure are represented by the rigidity and the negative Poisson ratio respectively. The provided examples show that the topological optimization method comprehensively considers the structure bearing and energy absorption characteristics, the optimized lattice structure can effectively absorb energy generated by collision, the structure does not collapse in the compression process, and the topological optimization method has acertain bearing capacity.

The invention relates to an active flexible telescopic truss structure, and belongs to the technical field of morphing aircraft structural design. The structure comprises a first panel and a second panel, a telescopic truss, springs and controllable alloy wires, wherein the first panel and the second panel are opposite to each other; the telescopic truss is arranged between the first panel and thesecond panel and can be stretched between the first panel and the second panel; the springs are perpendicular to the movement direction of the telescopic truss, and are respectively connected to thefirst side and the second side of the telescopic truss; the controllable alloy wires are respectively arranged on the first side and the second side of the telescopic truss; and stretching of the telescopic truss can be controlled through the control of the controllable alloy wires. The active flexible telescopic truss structure is driven through the controllable alloy wires (shape memory alloy wires), drives angles between telescopic trusses to change, and achieves the purpose of telescopic deformation.

The invention relates to a management method of a timer, comprising the steps of: dividing the time periods of the timer according to millisecond; and respectively storing a mutex lock, a flag bit and timer information associated with each time period in a memory. For each time period, the mutex lock is stored in the form of semaphore numerical value; the flag bit is stored in the form of unsigned short integer numerical value; the timer information is stored in the form of 16 continuous memory blocks, each of which can be used for storing the timer information of the timer in the belonged time period; and each bit of the flag bits orderly corresponds to one of the 16 memory blocks, respectively, so as to mark the use condition of the timer information in each memory block. According to the invention, the millisecond real-time timer is realized and has the advantages of: (1) satisfying the millisecond response mechanism of a real-time transaction system, (2) having multi-clue high-throughput bearing capability, and (3) supporting fast search.

The invention discloses high-performance nano thermal insulation materials with ultralow heat conductivity coefficients and a preparation method of the high-performance nano thermal insulation materials, and belongs to a thermal preservation and insulation material. The thermal insulation materials at least comprise thermal insulation padding, a barrier film coats the thermal insulation padding, the inner portion of the barrier film is in a vacuum state, and the barrier film is in close contact with the thermal insulation padding under the action of vacuum. A vacuum thermal insulation structure formed by the composite thermal insulation padding is adopted to improve thermal radiation, the thermal insulation performance of thermal insulation materials is effectively improved, the thermal insulation performance of the materials can be further improved with the assistance of all kinds of aerogel, and the heat conductivity coefficients obtained by the experiment of the inventor can reach 0.005W / m*K. In addition, the supporting structure inside the thermal insulation materials is optimized through a nano composite material technology, the thermal insulation materials are made to have certain bearing capacity, and meanwhile the materials are especially suitable for being used as the thermal insulation and thermal preservation materials in a sealed-space thermal insulation system with a limited size, can also be used in other devices or appliances to carry put thermal preservation and insulation, and are wide in application range.

The invention discloses an electric logistics vehicle comprising a chassis, a power driving system, an auxiliary frame, a sunken type rear axle and a wagon box body. The chassis comprises a front bearing portion, a middle bearing portion and a rear bearing portion; the auxiliary frame and the sunken type rear axle are mounted on the front bearing portion and the rear bearing portion correspondingly; the power driving system is arranged on the front bearing portion and / or the rear bearing portion; and the wagon box body is mounted on the chassis. The electric logistics vehicle is ingenious in structure, the power driving system on the chassis can achieve a front-mounted front-wheel drive, a rear-mounted rear-wheel drive or independent four-wheel-drive manner, the operating efficiency of thedrive system is achieved, and the performance requirements of the vehicle is met.

The invention relates to a method for construction and service of time tag business data for communication, which belongs to the technical field of communication. The method comprises the following steps: receiving a service request of a client through a server at first, analyzing business contents in the request and time tag information corresponding to the contents, and packaging the original data to form a business data packet according to the granularity of the time tag information; adding the time tag information into the business data packet to form a primary business data packet; obtaining a priority level of the primary business data packet according to the time tag information, and constructing time tag business data; determining a transmission sequence through the server according to the network communication capacity, the priority level and the time tag information; configuring the number of resources for storage, computation and communication of each time label business data; and transmitting the business contents of the request to the client and charging according to the transmission sequence. The invention makes the business flow in the network smooth, and eases the tension of resource allocation and the pressure for upgrading the network equipment.

An unbalanced shaft (1a, 1b, 1c), particularly for compensating mass forces and / or mass moments of inertia of an internal combustion engine (2) is provided. The shaft includes a shaft section (10, 11, 12) and a bearing journal (13a, 13b, 13c) axially adjacent to the shaft section, the bearing journal includes a fully cylindrical outer peripheral surface (18) serving as an inner raceway for the rolling elements (16) of a rolling bearing (14) and the bearing journal has a multi-piece configuration, so that both the shaft section and the bearing journal possess a mass center of gravity that, for producing the shaft unbalance, extends eccentric to the axis of rotation (19) of the unbalanced shaft. For supplying lubricant to the inner raceway and the rolling elements, an oil channel (20a, 20b, 20c) extends radially outwards through the bearing journal and opens, relative to the mass center of gravity of the bearing journal, on the other side, situated beyond the axis of rotation, on the outer peripheral surface.

The invention discloses a preparation method of an aluminium alloy rod for electric bicycle frame pipes, which is characterized in that the aluminium alloy comprises the following components by weight: 2-3% of Si, 2-5% of Mg, 0.5-1% of Zn, 0.2-1% of Mn, 0.3-0.7% of Cu, and the balance of Al and inevitable impurities; the preparation method comprises the following steps: (1) melting the ingots and intermediate alloy according to the weight ratios respectively; (2) injecting Ar-Cl2 mixed gas into a melting furnace, refining at a temperature of 710-730 DEG C for 8 min-10 min to obtain aluminium alloy melt; (3) adding an aluminium titanium boron grain refiner with the stream so as to allow the elements in the aluminium titanium boron grain refiner to uniformly melt in the alloy melt; (4) casting at a casting temperature of 720 DEG C-730 DEG C and with a casting speed of 45 mm / min-55 mm / min to obtain the aluminium alloy rod.

The invention relates to a foldable automatic following electric vehicle. The electric vehicle includes an foldable electric vehicle body, at least two UWB positioning bases, a UWB positioning label and a controller, wherein the at least two UWB positioning bases are arranged on the foldable electric vehicle body, the UWB positioning label is arranged on a specific object, and the controller is arranged on the foldable electric vehicle body. The controller is connected with the UWB positioning bases, the UWB positioning bases is communicated with the UWB positioning label through a UWB signal,and the controller controls the foldable electric vehicle body to achieve automatic following of the specific object according to a received signals of the UWB positioning bases. Compared with the prior art, the electric vehicle has the advantages of being high in following accuracy and capable of relieving the burden of users in walking, and the electric vehicle has the following function and meanwhile can also retain a certain transportation and object loading capacity.

The invention discloses a preparation method of a high-speed grinding fluid for a bearing, and relates to the field of metal machining fluid. The method comprises the steps of preparing raw materials, stirring, dissolving and measuring the pH value, so as to finish preparation of the high-speed grinding fluid for the bearing. The high-speed grinding fluid prepared by the preparation method disclosed by the invention is good in cooling performance, lubrication performance and cleaning and scouring performance, especially suitable for high-speed grinding with a linear speed of not less than 40 m / s, and capable of effectively increasing grinding efficiency.

This invention discloses a Mg alloy mud plate and its production method including the following steps: eliminating skins of Mg alloy rods and adding them into a heating oven to be heated to 400deg.C to keep it for 24h then to be cooled to room temperature in air then to be sent into a heating oven to be heated to 350-400deg.C to be kept for 3h then to be sent into a squeezer to be squeezed to sections then carrying out de-stress annealing or artificial aging process, finally, mechanical molding is finished.

The invention relates to a preparation method for partial water permeation floor tiles and the partial water permeation floor tiles. The preparation method comprises the following steps: A, preparing a hollow pattern mold according to a set hollow pattern; B, mutually embedding a floor tile brick mold of which the size is larger than that of the hollow pattern mold into the hollow pattern mold, putting the molds at a fixed position, then filling a region between the floor tile brick mold and the hollow pattern mold with a non water permeation material, and performing extruded forming; C, taking out the floor tile brick mold and the hollow pattern mold, ensuring that the hollow pattern is complete, and forming hollow tiles through maintenance; D, filling hollow parts of the hollow tiles with water permeation materials, enabling the water permeation material filling regions in the hollow parts and the whole hollow tiles to form an integrated structure through compaction or under the action of self-adhesion of the water permeation materials. A pavement paved by the partial water permeation floor tiles has certain bearing capacity and water permeation and ventilation ecological performance; meanwhile, the cost can be reduced, and the landscape effect is enhanced.

The invention discloses a production method for an aluminum alloy bicycle frame pipe for an electric bicycle. The aluminum alloy comprises, by weight, 2-3% of Si, 2-5% of Mg, 0.5-1% of Zn, 0.2-1% of Mn, 0.3-0.7% of Cu, and the balance of Al and other inevitable impurities. The production method comprises the following steps: (1) smelting the aluminum alloy according to the components and casting into a bar; (2) carrying out a homogenizing annealing treatment; (3) discharging the bar from a furnace after carrying out the homogenizing annealing treatment, cooling to a room temperature, then placing the bar in a heating furnace to heat to the temperature of 430-450 DEG C, and holding the temperature for 3 hours; concurrently heating an extrusion mold to the temperature of 350-380 DEG C, and heating an extrusion material cylinder to the temperature of 350-380 DEG C; (4) placing the heated aluminum alloy bar into an extruder to extrude into the bicycle frame pipe profile, wherein the extrusion speed is 2-7 m / min.

A thermo-decoupling expandable truss system applicable to a space planar antenna comprises a thermo-decoupling rectangular frame and an expandable truss. A thermo-decoupling function of bottom frame connectors can be used for releasing in-plane degrees of freedom of the planar antenna to keep a mounting foundation of the expandable truss unchanged under high and low temperature conditions, and in-orbit reliable expansion into a stable truss supporting system can be guaranteed. The expandable truss is contracted in a launching stage to bear load in the launching stage and can be expanded reliably to provide sufficient expansion rigidity and precision for the planar antenna after injection. The technical defect of failure in keeping profile accuracy of an existing antenna supporting structure in space severe temperature field is overcome, the system is available for thermo-decoupling with the antenna to release thermal stress, and the requirement of the antenna on a high-accuracy high-rigidity expandable supporting structure can be met.

The magnesium alloy clothes hanger has high mechanical performance, light weight and low cost, and the production process with high production efficiency and high product quality includes descaling magnesium alloy rod, heating in a furnace at 400 deg.c for 24 hr, air cooling to room temperature, re-heating in a furnace at 300-400 deg.c for 3 hr, extruding to form shapes, mechanical forming and welding to assembly, and annealing to eliminate stress or artificially ageing. Owing to the heat treatment, the magnesium alloy clothes hanger has well matched strength, plasticity and comprehensive performance, and may be used in various non-motored vehicle.

According to a ceramic matrix composite strength prediction method considering bearing of broken fibers, in a ceramic matrix composite, the broken fibers have certain bearing capacity due to the loadtransmission effect of the interfaces between the fibers and a matrix. According to the method, the continuous bearing of the broken fiber is considered, the method for judging the fiber breakage position is given, the stress of the broken fiber on the crack plane of the matrix is calculated, the strength of the ceramic matrix composite material is finally obtained, and the precision of a prediction result can be greatly improved.

The invention discloses a sludge curing device combining vacuum grouting and resistance heating. The sludge curing device comprises a plurality of grouting pipes, water draining plates, a horizontal water draining pipe, resistance wires, a horizontal grout conveying guide pipe, a grout conveying hose, a grout conveying pump and a curing agent grout storage tank. A plurality of grout outlets are formed in each grouting pipe. The multiple grouting pipes communicate with the horizontal grout conveying guide pipe. One water draining plate is arranged between every two adjacent grouting pipes. Themultiple water draining plates communicate with the horizontal water draining pipe. The horizontal water draining pipe communicates with an external water draining pipe. The resistance wires are woundon the water draining plates and electrically connected with a power source arranged in an external power source control box. The horizontal grout conveying guide pipe sequentially communicates withthe grout conveying pump and the curing agent grout storage tank through the grout conveying hose. The invention also discloses a sludge curing method adopting the sludge curing device. The sludge curing method is suitable for shoal sludge for reclaiming land from the sea by building dykes, a shallow soft soil foundation or a deep soft soil foundation, improves the curing degree of the sludge, shortens the curing time and enables the cured sludge to have certain bearing capacity.

The invention provides a switched reluctance motor variable-angle PI control method, a switched reluctance motor variable-angle PI controller and a switched reluctance motor speed adjusting system. The switched reluctance motor variable-angle PI control method comprises the steps of: regarding an absolute value of an output signal of a traditional rotary speed PI controller as a reference current of a current chopping controller, switching turn-on and turn-off angles of each phase according to positive and negative output of the traditional rotary speed PI controller, placing the turn-on and turn-off angles of each phase in a forward torque region when the output is negative, and outputting forward torque by a motor; otherwise, turning over the turn-on and turn-off angles to a backward torque region by taking theta=theta<r / 2> as a symmetry axis, and outputting backward torque by the motor. According to the switched reluctance motor variable-angle PI control method, the switched reluctance motor variable-angle PI controller and the switched reluctance motor speed adjusting system, the switched reluctance motor can output torque opposite to a given rotary direction when the given rotary direction is fixed, the dynamic response speed in the cases of sudden reduction of a given rotary speed and sudden unloading when the given rotary direction is fixed is accelerated, the switched reluctance motor has a loading capacity under the situation that the given rotary direction is opposite to a load direction, and the control method is simple and reliable, high in universality and easy to popularize.

The invention provides a locking mechanism. The locking mechanism comprises a rotary table, a connecting rod, a locking column seat and a locking column bushing. Since the connecting rod is hinged tothe rotary table, when the rotary table rotates, the connecting rod can be driven to move, a locking column hinged to the other end of the connecting rod is pulled, so that the locking column can be movably inserted into the locking column bushing to realize the locking function of the locking mechanism, since a limiting spring squeezes the locking column and the locking column seat body in the locking column seat body, the locking column is separated from the locking column bushing by the elastic force of the spring, so that the unlocking function of the locking mechanism is realized, the locking mechanism can be applied to a car door and a car window, so that when a car is in a bad environment, the locking mechanism of the door and window further has certain carrying capacity, and the practicality is good.

The present invention is a kind of thrust bearing using interface sliding technology, which is characterized in that it includes a stationary flat plate and a moving flat plate parallel to each other, the gap between the stationary flat plate and the moving flat plate is filled with fluid lubricating oil, Part of the surface is provided with II coating, the remaining surface is provided with I coating, and the surface of the moving plate is provided with III coating, so that a certain relative motion between the stationary plate and the moving plate makes the two plates form Thrust bearing; the I coating is a fluorocarbon coating; the II coating and III coating are mica powder coatings modified by a silane coupling agent. The bearing of the present invention has a simple implementation method, has a certain load capacity and good anti-friction and wear-resistant properties, does not need to process the geometric shape of the mating surface, has a simple and compact structure, small size, and low manufacturing cost, and can replace traditional fluid dynamic pressure lubrication. Thrust plain bearings are used for load bearing.

The invention provides a guiding and guarding clamping device and a rolling machine. The guiding and guarding clamping device comprises a framework, an adjusting mechanism comprising two screws and a guiding and guarding mechanism comprising an upper guiding and guarding box and a lower guiding and guarding box, wherein the framework comprises an upper cross beam and a lower cross beam which are opposite, a first side wall and a second side wall which are opposite, a first front pressing plate and a first rear pressing plate which are vertically connected to the first side wall, and a second front pressing plate and a second rear pressing plate which are vertically connected to the second side wall; a first sliding groove is defined by the first side wall, the first front pressing plate and the first rear pressing plate, and a second sliding groove is defined by the second side wall, the second front pressing plate and the second rear pressing plate; first and second external threads are separately arranged at the upper and lower parts of each screw; the two ends of the upper guiding and guarding box are separately arranged in a manner capable of sliding in the first sliding groove and the second sliding groove and are in surface contact with the first sliding groove and the second sliding groove; the two ends of the lower guiding and guarding box are separately arranged in a manner capable of sliding in the first sliding groove and the second sliding groove and are in surface contact with the first sliding groove and the second sliding groove; and the screws rotate and drive the upper and lower guiding and guarding boxes to slide in a face-to-face manner or back-to-back manner. The guiding and guarding clamping device has large bearing capability.