50results about How to "Improved power to weight ratio" patented technology

A device for compressive treatment of a body part comprises a compression member, adapted to at least partly encircle the body part, and an actuation unit, arranged to tighten the compression member to provide a compressive force to the body part. The actuation unit comprises an active material actuator. There is also disclosed a system comprising such a device and methods for its therapeutic, cosmetic and non-therapeutic use and operation.

The invention discloses a starting power generation system for an electric automobile, which comprises a double salient pole starting power generator, a starting power generation controller and controller working power; the starting power generation controller comprises a bidirectional power conversion circuit, an exciting current detection unit, an output current detection unit, an output voltage detection unit, a position rotation speed detection unit, an armature current detection unit, an exciting main circuit and a digital signal processor, wherein the exciting main circuit includes an exciting relay, a rectification filter unit and a chopper circuit which are connected in series in turn; and the digital signal processor is connected with the exciting current detection unit, the output current detection unit, the output voltage detection unit, the armature current detection unit, the position rotation speed detection unit, and the control ends of the bidirectional power conversion circuit, the exciting relay and the rectification filter unit by signals respectively. The invention also discloses an electric automobile and a control method thereof. Compared with the prior art, the starting power generation system is simple in structure, low in cost and flexible to control.

This invention relates to a stepless meshing control clutch with large power. The clutch, super clutch, control derailleur, line clutch, control strains drive device, which are designed by the principles of meshing stepless displacement and the continuous meshing stepless locking and control, which are suitable to automobile, derailleur, impulse derailleur, automatic derailleur, machine bed and other locations needing large power.

The iron core of stator and rotator is made of pressed stack silicon steel sheet. The three-phase machine has the structure of 6K/4K, namely the teeth numbers of stator is 6K, and the teeth numbers of rotator is 4K. K=1, 2, 3..... The iron core of stator is composed of 2K same iron core components, each component has three teeth, there are total amount of 6K teeth distributing evenly along the circle. The width at tooth tip is n/6K radian. The rotator has 4K teeth and the width at tooth tip is also 4/6K radian or a little bit more than n/6K. The tooth of rotate can be straight tooth or skewed tooth.

A double-impact integral hydraulic tapping machine comprises a borer assembly. A front support device, an impact device and a rotary device are sequentially arranged on the outer portion of the borer assembly from front to back, a backstop assembly is arranged at the rear end of the borer assembly, a rotary joint assembly is arranged at the outer end of the backstop assembly, the borer assembly comprises a rapping rod, a drill stem connecting sleeve is connected to the front end of the rapping rod, and the impact device comprises an impact functional module and a reversing control functional module. The double-impact integral hydraulic tapping machine has the advantages that the double-impact integral hydraulic tapping machine is adaptable to hard iron notches, is high in reverse impact output power and prevents the problem of stem withdrawal; a forward impact device and a reverse impact device are integrated, reverse impact operation can be carried out by retreating a trolley when the drill stem is required to be withdrawn, the stem withdrawal time is shortened, and misoperation is avoided; the double-impact integral hydraulic tapping machine is in a modular design, and is high in maintainability and low in failure rate; and the double-impact integral hydraulic tapping machine is high in protection performance, and the service life of equipment is long.

The invention relates to an inside engaged gear pump or gear motor device with a multilayer structure. The device comprises an inner rotor, N layers of double-faced toothed ring sleeves, an outer rotor and a pump body, wherein N is a positive integer more than or equal to 1; the inner rotor, the double-faced toothed ring sleeves and the outer rotor are sequentially arranged in the pump body from inside to outside; the tooth faces of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor are in a mutual contact engaged state; at least two sealed accommodation cavities are formed between adjacent elements of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor; and rotating axes of the inner rotor, the N layers of double-faced toothed ring sleeves and the outer rotor are positioned in the same plane, and are not overlapped. The double-faced toothed ring sleeves are additionally arranged between the inner rotor and the outer rotor, so that a volume between the rotor can be multiplied under the condition of no increase of widths of the rotors; and by the elastic compensation function of the double-faced toothed ring sleeves, a requirement on the machining accuracy of the inner and outer rotors of the device can also be lowered, so that machining difficulty and maintenance cost are lowered.

The invention provides a manufacturing technology of single-airway macromolecular soft fingers. The single-airway macromolecular soft fingers are formed by compositing PDMS (polydimethylsiloxane) rubber and Ecoflex 00-30 rubber, wherein an air cavity is formed between the PDMS rubber layer and the Ecoflex 00-30 layer. The manufacturing technology comprises the following steps: pouring one rubber into a mold cavity of a finger die, and curing to form a lower rubber layer; positioning a cylindrical die used for forming the air cavity on the cured rubber layer; pouring another rubber into the die, and curing to form an upper rubber layer; and then removing the cylindrical die to obtain the macromolecular soft fingers. The manufacturing technology of the single-airway macromolecular soft fingers is high in changeable-environment compliance, and high in safety; the single-airway macromolecular soft fingers are formed by compositing two types of rubber; the rubber, which is light in mass and high in flexibility, is used as the basic material, so that the single-airway macromolecular soft fingers are applicable to the man-machine interaction field.

The invention discloses a single-phase linear-motion inserting sheet type electromagnet which comprises an armature assembly, a stator assembly, a shell, a front end cover and a rear end cover, wherein the stator assembly comprises a stator left retainer, a stator left inserting sheet, a stator right retainer, a stator right inserting sheet, a coil retaining frame, a control coil and a circular-ring-shaped permanent magnet. The armature assembly comprises three portions, namely a hollow cup type armature retainer, armature inserting sheets and a push rod, wherein a plurality of inserting slots which are evenly distributed are formed in the radial outer cylindrical surface of the hollow cup type armature retainer, the armature inserting sheets can be inserted into the inserting slots and are made of silicon steel materials. Each arm inserting sheet is in a flat strip shape, is formed in a cold stamping mode and is provided with three rectangular teeth at different intervals, and the widths of the three rectangular teeth are the same. The shell, the front end cover and the rear end cover restraint and fix the stator assembly in the axial direction, and the shell is connected with the front end cover and the rear end cover through bolts.

A turboprop engine comprises all structures of a propeller, axial-flow compressors, evaporative combustors, turbines, an exhaust nozzle and the like, and is characterized by further comprising by-pass pipes and internal exhaust valves, and external exhaust valves are mounted or are not mounted in pipes outside the engine and between air inlets and air outlets of the by-pass pipes; and when the engine is started for operation, the internal exhaust valves are opened, the supercharge ratios of the axial-flow compressors are increased and kept unchanged by means of the by-pass pipes and through opening and closing of the internal exhaust valves or the internal exhaust valves and the external exhaust valves, the increased supercharge ratios are not larger than the mechanical strength limit which can be borne by the axial-flow compressors and the turbines, the turbine inlet temperature is kept unchanged, that is, the supercharge ratios and a power weight ratio are increased, the oil consumption rate is reduced, however, the number of stages of the axial-flow compressors and the turbines is not increased, and the turbine inlet temperature is not increased.

The invention discloses a high-supercharged two-stroke direct injection engine and a ventilation method thereof. The engine comprises an air cylinder; a piston is arranged in the air cylinder; the piston is connected with a crankshaft through a connecting rod; the center of the top wall of the air cylinder is provided with an oil sprayer; the top wall of the air cylinder is also provided with an air inlet and an exhaust vent; the air inlet is provided with an inlet valve; the air inlet is communicated with an admission passage; the admission passage is provided with a high-pressure ratio supercharger; the exhaust vent is provided with an exhaust valve; and the exhaust vent is communicated with an exhaust passage. In a loop, according to the rotation angle of the crankshaft, the exhaust valve is opened before the piston reaches a bottom dead center for 45 DEG and is closed after the piston bypasses the bottom dead center for 60 DEG; the inlet valve is opened after the piston bypasses the bottom dead center for 15 DEG and is closed before the piston reaches a top dead center for 85 DEG; and the inlet valve is closed after the exhaust valve is closed. The engine disclosed by the invention has the advantages that the structure is compact; the manufacturing difficulty is reduced; air intake and exhaust are controllable; the power weight ratio is greatly improved; and moreover, fuel economy and emission level which approach to that of a four-stroke engine can be realized.

A turbine shaft engine comprises axial-flow compressors, evaporative combustors, a turbine, a free turbine, a drive shaft, an exhaust nozzle and the like, and is characterized by further comprising by-pass pipes and internal exhaust valves, and external exhaust valves are mounted or are not mounted in pipes outside the engine and between air inlets and air outlets of the by-pass pipes; and when the engine is started for operation, the internal exhaust valves are opened, the supercharge ratios of the axial-flow compressors are increased and kept unchanged by means of the by-pass pipes and through opening and closing of the internal exhaust valves or the internal exhaust valves and the external exhaust valves, the increased supercharge ratios are not larger than the mechanical strength limit which can be borne by the axial-flow compressors, the turbine and the free turbine, the turbine inlet temperature is kept unchanged, that is, the supercharge ratios and a power weight ratio are increased, the oil consumption rate is reduced, however, the number of stages of the axial-flow compressors and the turbines is not increased, and the turbine inlet temperature is not improved.

The invention relates to the technical field of unmanned aerial vehicles, and provides a petrol-electric hybrid vertical take-off and landing sweepforward fixed wing unmanned aerial vehicle. A fuselage assembly comprises a handpiece front cabin, a front fuselage and a rear fuselage which are sequentially connected from front to back, and at least one electric ducted fan engine is internally arranged in the handpiece front cabin; energy assembly and a load cabin are internally arranged in the rear fuselage, a propelling propeller assembly is arranged at the tail of the rear fuselage, and the propelling propeller assembly is used for proving front thrust to overcome aerodynamic resistance of the unmanned aerial vehicle during flying; and wing assemblies are installed on the two sides of therear fuselage in a sweepforward mode; an empennage assembly is installed on the tail segment of the rear fuselage; vertical lift force devices are of an electric fan mode, and the two vertical lift force devices are symmetrically installed on the left side and the right side of the middle fuselage. The petrol-electric hybrid vertical take-off and landing sweepforward fixed wing unmanned aerial vehicle has the characteristics of vertical take-off and landing and remote navigation, large lift force vertical take-off and efficient horizontal flight integration, vertical lift force system and fixed wing layout integrated design and rotary wing vertical lift force and fixed wing lift force integrated control are realized.

The invention discloses a high-power laser constant-current source circuit for space navigation, which comprises a plurality of Superboost constant-current driving power supply modules, which are connected in parallel and a plurality of high-voltage storage battery packs, the input end of each Superboost constant-current driving power supply module being correspondingly connected to the two ends of one high-voltage storage battery pack in parallel; and a plurality of laser load power supply pump modules, wherein the output end of each Superboost constant current driving power supply module is correspondingly connected with one laser load power supply pump module, and each Superboost constant-current driving power supply module is used for driving the corresponding laser load power supply pump module in a constant-current manner. The driving power supply has the characteristics of high stability, high power, high efficiency and high power density, and meets the performance requirements of the laser load for space navigation on the driving power supply.

A two-dimensional half-bridge electro-hydraulic proportional directional valve based on a push rod mid-mounted roller coupling comprises a two-way proportional electromagnet, the push rod mid-mounted roller coupling and a two-dimensional half-bridge electro-hydraulic proportional directional valve body which are sequentially arranged from left to right, and the two-dimensional half-bridge electro-hydraulic proportional directional valve body comprises a valve body, a valve sleeve and a valve element. The two-way proportional electromagnet is mounted at the left end of the valve body, the push rod mid-mounted roller coupling is mounted at the left end of the valve element, and the valve element is connected with the two-way proportional electromagnet through the push rod mid-mounted roller coupling. A two-dimensional hydraulic amplification mechanism with two degrees of freedom of the valve element is adopted, rotation of the valve element serves as a pilot level, axial movement of the valve element serves as a power level, the pilot level and the power level are integrated on the single valve element, the structure is simple, the machining cost is low, and the power-to-weight ratio is greatly increased.

The invention relates to a rotary cylinder piston type engine. The whole engine consists of an upper part and a lower part, the upper part is a combustion system assembly which comprises upper supports, lower supports, an upper rotor component and a lower rotor component, and the lower part is a transmission system assembly which comprises an upper transmission cavity cover, a transmission cavity and a transmission component assembly; the upper rotor component and the lower rotor component respectively comprise a ventilating disc, two air cylinders and two pistons, which are fixed; the upper rotor component and the lower rotor component are alternately and forwardly rotated by the transmission component assembly, the ventilating disc is tightly connected with a valve disc of the upper supports or the lower supports to carry out ventilation, and thereby the four-stroke engine is formed.

A multifunctional intelligent sensing magic cube structure comprises a magic cube bracket, a sensing assembly, a central control assembly and a power supply unit, wherein the sensing assemblies, the central control assembly and the power supply units are arranged on the magic cube bracket; the magic cube bracket comprises a cubic body, a first accommodating cavity is formed in the center of each face of the body, a plurality of second accommodating cavities are formed in the peripheral side of each first accommodating cavity, and the adjacent second accommodating cavities in the adjacent facesof the body are communicated with one another; the central control assembly is arranged in the first accommodating cavity, the sensing assemblies are arranged in the second accommodating cavities, and the power supply units are arranged at a cavity opening of the first accommodating cavity respectively. The multifunctional intelligent sensing magic cube structure can be carried by personnel or thrown to a preset place by means of an unmanned aerial vehicle, and is densely deployed in a related combat domain in a large range, so that low efficiency and danger of manual layout are avoided, andlarge-range reconnaissance and monitoring of the environment can be quickly realized.

The invention discloses a novel energy-containing liquid fuel two-stroke engine. The novel energy-containing liquid fuel two-stroke engine is composed of a piston, an air cylinder cover, a combustion chamber, an exhaust port, an energy-containing liquid fuel sprayer and an igniter. The wall of the combustion chamber is provided with the energy-containing liquid fuel sprayer, the exhaust port and the igniter. The piston is arranged at the lower end of the combustion chamber. Due to the fact that the engine is not provided with an air inlet, the engine can work in the environment without air, self-sustained combustion can be conducted under the condition of oxygen inexistence, and accordingly, the design and production problem that the power weight ratio of an internal combustion engine is low is solved. The novel fuel is friendly in environment and high in safety and has obvious economic and military benefits.