203results about How to "Improve power-to-weight ratio" patented technology

A rotary electrical machine has at least one stator and a rotor. The stator includes at least one armature winding received in at least one pair of slots. The rotor includes flux switching arrangement, which is adapted for selectively establishing closed magnetic circuits which pass around the turns of the armature winding. The arrangement for switching the flux comprises at least one permanent magnet adapted to establish a magnetic flux which is looped on itself in one circumferential direction of the rotor, together with at least one excitation winding for establishing an adjustable magnetic flux locally in a circumferential direction opposite to the direction of the flux produced by the magnets.

The invention provides a cable-free air bag type robot system which comprises a monitoring computer, a singlechip microprocessor, a wireless communication receiving and sending device, a wireless energy emitting circuit and a cable-free air bag type robot, wherein the singlechip microprocessor is respectively connected with the monitoring computer, the wireless communication receiving and sending device and the wireless energy emitting circuit, and the cable-free air bag type robot is in communication connection with the wireless communication receiving and sending device and is in energy exchange with the wireless energy emitting circuit. The cable-free air bag type robot system has the advantages of small trauma, safety and reliability, high movement efficiency, and wide application range.

The invention provides a mid-engine incremental stroke electric vehicle. The electric vehicle comprises a vehicle body, a turbo shaft engine (1), a battery pack (2), a generator (3), a whole vehicle controller (4), a driving motor (5), a gas controller (6), a battery controller (7), a gas holder (8) and a gas inlet tank (12), and is characterized in that the vehicle body comprises a vehicle main body, wherein the bottom structure of the vehicle main body forms a vehicle frame; the turbo shaft engine (1) is distributed between a front axle and a rear axle and is close to the vehicle frame of the rear axle; the axis of the output shaft of the turbo shaft engine (1) is positioned on the symmetry planes of the vehicle body; the air inlet of the turbo shaft engine (1) faces towards the tail of the vehicle; the gas inlet tank (12) is communicated with the air inlet of the turbo shaft engine (1); the gas inlet tank (12) is communicated with a gas inlet grille on a vehicle covering piece. The electric vehicle has the characteristics of high energy conversion efficiency, good operating performance, long driving mileage and high vehicle body structural strength.

A four stroke diesel engine combined with a supercharger is operable to supply varying amounts of air to the engine responsive to the load on the engine. The supercharger has a pair of rotors driven by the engine operable to move air to the engine. Gates associated with the rotors control the amount of air and pressure of the air moved by the rotors to the diesel engine.

The invention discloses a pressure self-balance type electromechanical servo action device under the high-pressure environment. The pressure self-balance type electromechanical servo action device comprises a servo motor, a planet pin roller screw pair, a piston, a speed reducer, a sensor, a shell and other matched devices. The shell is internally fully filled with oil liquid, and the piston can freely move in a piston cylinder. An oil passing hole is reserved in a main shell, and it is guaranteed that oil liquid in the main shell and a front shell flows smoothly. The rotation movement of a screw is converted into the linear movement through a nut, and an output rod is pushed to output the linear movement. A linear displacement sensor is arranged on the main shell, and a magnetic ring is arranged on a guiding block and does the linear reciprocating movement along with a deep groove ball bearing. A high-low lip seal is adopted as a dynamic seal at the position of a copper sleeve, static seals are adopted at other shell connecting parts, and inner and outer liquid mixing is prevented. The pressure self-balance type electromechanical servo action device solves the problems that an existing electromechanical action device is weak in voltage endurance capability, low in efficiency and the like, the power to weight ratio, the voltage endurance capability and the load capability of the electromechanical action device are improved, and a technology guarantee is provided for promoting the development of submarines and underwater devices under the high-pressure environment.

The invention discloses a highly-integrated pressure balance type deep sea electro-hydraulic servo mechanism and belongs to the technical field of deep sea electro-hydraulic servo. A spherical hinge rod end is arranged on an extending end piston rod through a spherical hinge rod end thread connection hole, a cylinder barrel combination piece and a valve block and pressure balance device combination piece are connected together through a screw, the valve block and pressure balance device combination piece and a balance piston placement barrel are connected together through a screw, a balance piston is put into the balance piston placement barrel, sea water and high-pressure oil are arranged at the front end and the rear end, the high-pressure oil enters the balance piston placement barrel through a high-pressure oil hole and is used for balancing the pressure of the whole system, four baffles are evenly arranged at the rear end of the balance piston placement barrel, and an emergency pipe connector is arranged on a piston rod pressure balance barrel and a cylinder bottom cover. The highly-integrated pressure balance type deep sea electro-hydraulic servo mechanism has the beneficial effects that pressure balance and a highly-integrated structure are adopted to the design and layout, meanwhile, the dual-redundancy design thought is adopted, reliability and safety are greatly improved, and the service life is greatly prolonged.

A novel electric motor rotor structure, particularly desirable for use with brittle rare-earth-magnets, offers improved resistance to rattling and axial shifting. This is achieved by forming the rotor with an annular central yoke connecting to a plurality of pole shoes along the periphery of the rotor and defining a magnet-receiving recess or pocket 160 between each pole shoe and the central yoke. Spaced circumferentially between adjacent magnets 38 are regions 146 of reduced magnetic conductivity, which include relatively thin metallic holding segments, which connect adjacent pole shoes to each other and to the central yoke. During manufacturing, tools are applied to upset or crimp the holding segments, and thereby form spring elements, to hold the magnets in stable positions and resist any tendency of the magnets to rattle or axially shift during motor operation. One obtains the same power level from a smaller, and therefore lighter, motor than was previously possible.

The invention discloses a double-piston-rotor internal combustion engine. A first rotor comprises a rotating shaft disc, two first piston bodies are arranged at one end of the rotating shaft disc, a first rotating shaft provided with a first egg-shaped gear is installed at the other end of the rotating shaft disc, and the bottom face of a cover plate is connected with the end faces of the first piston bodies. A second rotor comprises a second rotating shaft, two second piston bodies are arranged at one end of the second rotating shaft, a second egg-shaped gear is installed at the other end of the second rotating shaft, the second rotating shaft is installed in a shaft hole of the first rotating shaft in a penetrating mode, and the second rotating shaft and the first rotating shaft are jointly installed in a shaft hole of a disc-shaped piece in a penetrating mode. An upper end disc and a lower end disc of the disc-shaped piece are connected with a combustor shell and a flange of a gearbox through bolts respectively. A power output gear shaft is installed in a shaft hole in the bottom of the gearbox. Upper egg-shaped gears of two double-egg-shaped gear shafts are meshed with the first egg-shaped gear and the second egg-shaped gear respectively, and lower egg-shaped gears of the two double-egg-shaped gear shafts are meshed with two egg-shaped gears on the power output gear shaft respectively. The double-piston-rotor internal combustion engine is low in oil consumption, high in power-to-weight ratio, large in output torque, low in vibration, simple and compact in structure, easy to design and good in manufacturability.

The invention discloses a detachable hydraulic cylinder with a carbon fiber composite for connection and load bearing. The detachable hydraulic cylinder comprises an end cap, a cylinder head, a cylinder barrel outer layer, a cylinder barrel lining, a cylinder bottom, a piston rod and a piston. The cylinder barrel outer layer is formed by adopting high-strength carbon fibers as reinforcing material and epoxy resin as a substrate, and winding the carbon fibers on a cylinder barrel assembly metal part by adoption of a contact molding method. Compared with a metal hydraulic cylinder, the detachable hydraulic cylinder has the advantage of being remarkably low in weight; compared with an existing composite hydraulic cylinder, by adopting a composite body as the connection structure, the reliability is higher than that of adhesive connection; due to the fact that threads, bolts and pins are not adopted for connection between the composite and metal parts, the composite structure is not locally damaged by machining, the continuity and integrity of the carbon fibers are guaranteed, and the advantage of high strength of the carbon fibers is given full play to the greatest extent; and a cylinder barrel assembly can be separated from other assemblies, so that the maintenance cost and difficulty of the detachable hydraulic cylinder are lower than those of an integral composite hydraulic cylinder.

The invention discloses a nesting type shape memory alloy pneumatic artificial muscle. The nesting type shape memory alloy pneumatic artificial muscle comprises an upper fixing disc, fixing rods, axial SMA wires, a sliding disc, a pneumatic muscle body, a PM lower installing disc, a lower fixing disc, a sliding square shaft, a rotating shaft, a PM upper installing disc, springs, radial SMA wires, a drive circuit, upper fixing disc wiring holes, a rotating shaft hole, sliding disc rod penetrating holes, sliding disc wiring holes, lower fixing disc wiring holes and a square hole. The pneumatic muscle body is nested in a fixing frame, and accordingly the device structure is compact. The axial SMA wires are wound many times, the effective length is increased, large deformation is generated, muscle bundles are pulled, the contraction amount of the muscle bundles is increased, and through the wire delaying circulation effect generated due to superelasticity of the wires, influences generated by load vibration can be relieved; through contraction of the radial SMA wires, muscle bundle rotation is achieved, and the rigidity of the pneumatic muscle body is changed; and compared with the same-type pneumatic muscle on the market, the pneumatic muscle is compact in structure, large in contraction amount and wide in rigidity changeable range.

The invention relates to an electrical conductor which is made up substantially of one or even several metal conductors which are sheathed by a graphene layer. Particularly in the case of the electrical conductor transporting an alternating current, the current in the conductor is forced radially outwards and therefore flows in the graphene layer. Since graphene has a substantially better conductivity than the materials customary in this application, such as copper for example, relatively low losses are accordingly produced and substantially higher degrees of efficiency can be achieved. The electrical conductor constructed in this way is used in a stator and/or rotor winding of an electrical machine, so that it has a significantly elevated power-to-weight ratio.

The invention relates to an engine valve mechanism and a horizontally opposed double-cylinder engine. The engine valve mechanism comprises a drive assembly and a valve assembly driven by the drive assembly, wherein the drive assembly comprises a camshaft vertical to a crankshaft space, tappets driven by a cam, tappet rods driven by the tappets and a valve rocker arm assembly which swings and drives the valve assembly under drive of the tappet rods; a crankshaft with timing driving teeth directly drives the camshaft with timing driven teeth, and then the tappets and the tappet rods drive valverocker arms to drive an intake valve and an exhaust valve to open and close back and forth. The engine valve mechanism avoids gear or chain transmission connection modes, and has higher transmission efficiency and lower engine development and maintenance costs. The tappets and the tappet rods are arranged outside an engine body, so that size of an engine is reduced, the engine is lightweight, andthe power to weight ratio of the engine is increased; besides, the included angle between the valves of the valve mechanism is 0, intake resistance can be reduced to the greatest extent, intake efficiency is improved, the application field of the engine is expanded, and the structure is simple and compact.

The invention discloses a dual-motor propulsion system and a control method thereof. The method comprises the steps that a main motor controller communicates with the outside to receive a rotating speed instruction and feeds back state information of a motor to the outside; a rotating speed instruction is received from the motor controller and external communication, and state information of the motor is fed back to the outside; wherein the rotating speed instruction comprises a main rotating speed instruction of a main motor and a slave rotating speed instruction of a slave motor; the mastermotor controller and the slave motor controller are in internal communication to transmit data to each other. According to the control method of the dual-motor propulsion system, the dual motors can be effectively controlled to output the rotating speed and the torque in a balanced mode according to the rotating speed instruction and the propeller load, the system has the advantage of being good in fault tolerance based on cooperative control and redundancy design, and it can be guaranteed that the whole motor system can continue to work when part of faults occur.

Provided is a non-similar redundancy electric steering device. The advanced power-by-wire technology and volumetric speed control principle are adopted, and two sets of motors drive a hydraulic pump system to directly drive a double-redundancy series cylinder. The device comprises a set of double-redundancy electro-hydrostatic servo mechanism (2) and a set of double-redundancy driving controller (7), wherein the double-redundancy electro-hydrostatic servo mechanism (2) is composed of an electro-hydraulic pump servo mechanism (1) and a double-variant motor pump source servo mechanism (4), and the double-redundancy driving controller (7) is composed of a control unit (8) and a driving unit (9); the electro-hydraulic pump servo mechanism (1) comprises an electro-hydraulic pump (10) and accessories, and the double-variant motor pump source servo mechanism (4) comprises a servo motor (6), a two-way variable pump (5) and accessories. The device can replace an original servo valve-controlled steering engine arranged on a vehicle to achieve high-reliability and high-power telex servo working and has the advantages of being low in energy consumption, small in size and weight and easy to install and maintain.