212results about How to "Improve lifting performance" patented technology

A dual ducted fan arrangement in which the duct components, engine, and avionics / payload pods are capable of being quickly disassembled to fit within common backpacking systems. Each duct is identical in fan, stator, and control vane design. Assembly connections between ducted fans and electronic modules are also identical. An engine or APU drives the dual ducted fans through a splined shaft to a differential or through electric motors. Energy is transferred to the ducted fans by a single gear mounted to the stator hub. Relative speeds of the individual ducted fans are controlled through separate frictional or generator load control braking mechanisms on each of the splined shafts between the differential and ducted fans. In the electric motor case relative speed is through electronic speed control. The fans are counter rotating for torque balancing. The electronic module locations are vertically variable for longitudinal center of gravity for variations in payloads.

A vehicle, particularly a VTOL air vehicle, includes a duct carried by the vehicle frame with the longitudinal axis of the duct perpendicular to the longitudinal axis of the vehicle frame; a propeller rotatably mounted within the duct about the longitudinal axis of the duct to force an ambient fluid therethrough from its inlet at the upper end of the duct through its exit at the lower end of the duct, and thereby to produce an upward lift force applied to the vehicle, and a plurality of spaced vanes mounted to and across the inlet and exit ends of the duct about axes substantially perpendicular to the longitudinal axis of the duct and selectively operational to produce a desired horizontal control force in addition to the lift force applied to the vehicle.

A hoisting device and method for hoisting material up an extension ladder. The device includes a load-carrying carriage having a wheel and roller axle assembly that also serves as rollers for engagement with the rails of the ladder. The wheel and roller axle assembly allows the cart to transition from the ladder rails to the roof surface. Also provided is a dual braking means that serves to prevent the carriage from rolling back down the ladder or off of the roof in cases of cable malfunction. The method employs a hoisting mechanism having a removable winch used in conjunction with a releasable coupled pull cable that is brought to the roof surface on the carriage, detached from the carriage, mounted on the roof and used to return the carriage to and from the roof during hoisting operations. An infinitely adjustable ladder support is provided to support the ladder during a hoist.

A pseudo surface microwave produced plasma shielding system is a simple device that creates a prescribed plasma environment with a prescribed plasma density gradient, and protects an object surrounded by this environment as a shield. Pseudo surface microwaves interacting with an artificial intelligence equipped on board are used to create and to adjust this plasma environment for a particular application. This plasma environment provides potential capabilities of military applications of the plasma in the system. Examples of military applications include a stealth system from RADAR and SONAR, a protection system from WMD, and a weapon system to generate and launch plasmoids as a plasma gun. The scope of this invention extends to commercial applications of this plasma shielding system as a conditioned and controlled flow field, for example, a boundary layer and turbulence control system, and a lift control system to improve flight performance and flight economy of aircrafts. It further extends to develop a concept of a new type of engine using this plasma shielding system as a heating method alternative to the conventional combustion method that uses petroleum based fuel in the combustion chamber of an engine.

A vehicle, particularly a VTOL air vehicle, includes a duct carried by the vehicle frame with the longitudinal axis of the duct perpendicular to the longitudinal axis of the vehicle frame; a propeller rotatably mounted within the duct about the longitudinal axis of the duct to force an ambient fluid therethrough from its inlet at the upper end of the duct through its exit at the lower end of the duct, and thereby to produce an upward lift force applied to the vehicle, and a plurality of spaced vanes mounted to and across the inlet and exit ends of the duct about axes substantially perpendicular to the longitudinal axis of the duct and selectively operational to produce a desired horizontal control force in addition to the lift force applied to the vehicle.

A downhole electric driven pump unit for oil production comprises a submersible electric motor (1), a driven oil pump (2), a working plunger pump (4), an oil tank (7) provided with a secondary oil filter (8), an oil volume expansion compensator (9) and a hydraulic engine (10). Above-piston and under-piston cavities (11, 12) of the hydraulic engine cylinder (13) are connected to the oil pump suction and discharge sides (15, 16) through a distributor (14). The hydraulic engine piston (17) is connected to the plunger (18) of the working pump. The electric motor is provided with a protector (19) and is cinematically linked with the driven pump shaft by means of the protector shaft. The working pump cylinder (20) is provided with a sealed cylindrical diaphragm (21) made of elastic material such that oil filled cavity (22) is formed. The working pump plunger (18) is mounted such that it is reciprocatingly displaceable in the cavity (22). A pressure valve (31) is arranged above the discharge valve (6) such that a cavity (23) is formed. The compensator (6) is in the form of a cylinder (24) provided with a cylindrical diaphragm (25) which is placed therein such that an internal sealed cavity (26) communicating with the oil tank (7) and an annular cavity (27) is formed. Said invention makes it possible to increase the performance factor and reliability of the unit.

A lifting medium for an LTA craft is disclosed which includes a mixture of hydrogen and a quench gas which has a fire extinguishing action. This quench gas may be CF3Br, CF2ClBr, CF3—CHF—CF3, CHF3, C4F10, CF3CF2H, CF3CH2CF3, CF3I, CHClFCF3, or a mixture of two or more of these. An LTA craft buoyed by this lifting medium is also disclosed. The LTA craft may comprise an envelope comprising a main chamber, a vent chamber generally above the main chamber and separated therefrom by a separating membrane, and a first pressure relief valve opening between the vent chamber and the external atmosphere, which opens at a certain first threshold pressure. There may be further comprised means for ripping the separating membrane, or a second pressure relief valve opening between the main chamber and the external atmosphere, the second pressure relief valve opening at a second threshold pressure which is substantially greater than the first threshold pressure, or a flexible tube fitted to lead from the outside of the first pressure relief valve outward away from the envelope. The main chamber may be filled with the above lifting medium, and the vent chamber may be filled with helium or with hydrogen.

The invention provides a dual-machine loading-and-walking type hydraulic numerical control deck erection gantry, which comprises two sets of loading-and-walking type hydraulic numerical control deck erection gantries and a control system, wherein each set of the loading-and-walking type hydraulic numerical control deck erection gantries comprises the following four parts: a transverse truss girder, two sets of walking type loading-and-walking devices arranged at two ends of the transverse truss girder, a hydraulic lifting device and a carrying pole of a hanger; each set of the walking type loading-and-walking devices consists of a guideway, a walking mechanism steel framework, m traction jacks, 4n load conversion jacks, a supporting pull rod, a walking roller bracket and P guideway walking jacks; all the components are connected with one another by pin shafts; and the control system of the deck erection gantry is a distributed computer network control system which consists of a main control station, Y field controllers, Y pump stations, Y pump station starting boxes, a data acquisition system, and a plurality of data wires and communication wires. The deck erection gantry has the advantages of great lifting force and high work efficiency and stability; and when the deck erection gantry walks with load, the control system of the deck erection gantry can effectively and synchronously control every jack.

The invention relates to a large-tonnage lorry-mounted crane which comprises a base, a lifting hook, an oil tank, a hydraulic control system, a support leg assembly, a swing mechanism, a first amplitude transformation mechanism, a second amplitude transformation mechanism and a telescopic arm assembly, wherein the support leg assembly comprises two horizontal telescopic support legs, two vertical telescopic support legs and two turnover sliding plates; the swing mechanism comprises a swing hydraulic motor, a planet gear reducer, and a swing support with an inner ring fixed on the base; the first amplitude transformation mechanism comprises a main arm, a connecting rod I, a connecting rod II and a first amplitude transformation cylinder; the second amplitude transformation mechanism comprises a second amplitude transformation cylinder connected to the main arm, a connecting rod III and a connecting rod IV; the telescopic arm assembly comprises a fixed telescopic arm; multiple telescopic arms mutually sheathed together are sheathed on the fixed telescopic arm; and telescopic cylinders on each telescopic arm are arranged in a mutually staggered mode. The invention can realize the two-stage telescopic operation by adopting the horizontal support legs, enlarges the span distance among the support legs, enhances the bearing capability and strengthens the stability of the crane. The large-tonnage lorry-mounted crane provided by the invention has the advantages of simple structure, strong adaptability and lighter weight of the finished crane.

A multi-wing, multi-engine, multi-hull amphibious aircraft is disclosed. In the illustrative embodiment, the aircraft has an open frame structure without a fuselage.

Aerial dispersion systems that may be employed to allow rapid and temporary conversion of aircraft for aerial dispersion purposes, such as aerial fire-fighting. The aerial dispersion systems may be implemented using modular components that may be configured for compatibility with conventional cargo loading and unloading systems of modern aircraft, including side-loading cargo systems of wide body passenger and cargo aircraft having high lift capacities. The aerial dispersion systems may be rapidly installed in a large fleet of high capacity aircraft in response to a wildfire or other rapidly-developing emergency such as an oil spill, chemical or biological contamination incident, building or refinery fire, etc. After use, the aircraft of the fleet may be rapidly de-modified and returned to original condition. The aerial dispersion systems may be operated with a fleet of aircraft in a coordinated manner, for example, as part of an aerial firefighting formation having multiple aircraft sharing information and / or common control.

An offshore drilling rig comprising a drill deck, at least one primary well center and a diverter system arranged below the primary well center, a drilling support structure extending upwardly from the drill deck and above the primary well center and the other work center and a first and a second hoisting system supported by the drilling support structure and being adapted for raising or lowering a first and a second load carrier, respectively, and where the offshore drilling rig comprises a positioning system adapted for selectively positioning at least the first load carrier in at least a first or a second horizontal position different from the first horizontal position, where the first load carrier in the first horizontal position is positioned above the primary well center, and in the second horizontal position is positioned above the other work center.

The invention discloses a combined counterweight device and a crane using the same and aims to solve a problem that the prior counterweight device cannot move backwards and forwards. The combined counterweight device of the invention comprises a counterweight body, two horizontal slide rails, a counterweight bracket, two vertical oil cylinders and two horizontal oil cylinders, wherein the vertical oil cylinders are fixed on the counterweight bracket through the two vertical oil cylinders, and the counterweight bracket can slide backwards and forwards along the horizontal slide rails fixedly arranged on two sides of the tail part of a turntable under the action of the two horizontal oil cylinders. The key design points of the combined counterweight device and the crane using the same include: the counterweight body can move backwards and forwards to effectively improve the length of the big arm and the vehicle stability under a large amplitude working condition of the crane and to reduce the vehicle length to impact the structure of the crane respectively; and at the same time, the crane has a relatively small radius when driving on a curve, so the rideability of the crane is greatly improved.

A method of performing an under water operation on a structure (10) or in the vicinity of the structure includes providing a device (18) having a movable arm (20) and at least a first support (22) constructed to be connected to the structure, the movable arm (20) directly or indirectly connected at a proximal end (34) to the support, the first movable arm having a first tool (30) connected to a distal end (36) of the first movable arm, at least one actuator (33) configured to controllably move the first tool (30) in a three dimensional working range in order to position the first tool at a target location, attaching the device to the structure via the at least one support, and-moving the tool in three dimensions and performing an operation under water.

The invention discloses a unilateral cantilever type water survey platform system, comprising a working boat, a unilateral cantilever survey platform, a boring tower and equipment. The working boat isprovided with a plurality of windlasses, at least two shaped steels are arranged on the deck of the working boat, a plurality of supports are arranged on the shaped steels in a crossing way and extends out one side of the boat body, floor board and channel steel are laid on the supports, wherein the position of channel steel corresponds to the position of the shaped steel, the channel steel is infixed connection with the support and the shaped steel, and the parts of the support and the floor board, extending out the boat body, are the working area cantilever sides. The boring tower is arranged on the unilateral cantilever survey platform. The equipment, comprising the boring tower inside the working area cantilever side and the slurry pumps on the boat body, is arranged on the survey platform. The invention is simple, has low cost, and can be used for geotechnical coring, sampling and in situ testing when exploring underwater, thereby ensuring exploration goes smoothly under any environments and conditions.

The invention provides a crane and a wire cable length measuring device of the crane. The measuring device comprises a base comprising two brackets, wherein one end of the each bracket is connected with a mast of the crane; a rotating shaft, wherein both ends of the rotating shaft are respectively connected with the other end of each bracket; a head pulley mounted on the rotating shaft, wherein a wire cable winds around the head pulley; a roller bearing matched with the head pulley for clamping the wire cable; two connectors mounted on the rotating shaft and respectively located at both sides of the head pulley and the rotating shaft for connecting the head pulley with the roller bearing so that the wire cable can roll relative to the head pulley without relative sliding; and a counter connected with one end of the rotating shaft for measuring the length of the wire cable. The discharge length of the wire cable is measured in real time through above way to control the length of the wire cable under different working conditions, so as to bring the bearing property of the wire cable into full play. In this way, the lifting property of the crane is improved.

A foldable hoist, fall-arrest and recovery system to be used in connection with a rectangular manhole guard having vertical posts at four corners of the guard including an upper structure having four elongated support members forming a pyramid shaped structure with the base of each of the support members being securely mounted to the top of a post on the manhole guard and the other ends of the support members being pivotally connected to an apex so that the upper structure can be folded for storage and shipment when disconnected from the base and means connected at the apex for raising and lowering workers and / or cargo into and out of the manhole or for arresting the fall or recovering a worker.

The invention provides a rotary counter weight mechanism comprising a rack, a counter weight unit and a driving device; the counter weight unit and the rack are hinged by using a pin shaft; and the driving device is used for driving the counter weight unit to swing relative to the rack. Therefore, the lifting property is improved without increasing the weight of the whole crane or changing the contour dimension; and the crane is simple in structure, excellent in safety and low in manufacturing cost.

The invention discloses a chain-type hydraulic hoist for lifting, which comprises a lifting hook, a hydraulic drive control part, a lifting part, a planetary reducer and a high-strength lifting chain; the hydraulic drive control part comprises a valve block, a hydraulic motor, a non-brake oil tube and a hydraulic brake; the lifting part comprises an end cover, a housing, a driving chain wheel, a locating bearing and a primary drive gear; the planetary reducer comprises a sun wheel shaft, a planetary gear, a planetary gear shaft, a planetary gear rack, a primary gear ring, a fixed gear, a secondary gear ring and a planetary reducer shell; the hydraulic hoist provides a control oil tube by a matched hydraulic system on mining machinery, and drives the planetary reducer by the hydraulic motor; the planetary reducer outputs a torque to drive a lifting driving chain wheel, and drives an annular lifting chain and a lifting hook device to lift and put down heavy objects, and also can be used for horizontally dragging the heavy objects (namely used as a hydraulic winch). The chain-type hydraulic hoist is suitable for downhole operation of coal mine, and has the advantages of being reasonable in structure, large in lifting ratio in equal volume, simple and convenient to operate, high in work efficiency, safe and reliable.

Aircraft exhaust systems and methods are disclosed. In one embodiment, an integrated propulsion assembly includes a wing assembly having an upper surface and a lower surface, and a propulsion unit at least partially disposed within the wing assembly. An exhaust system is configured to conduct an exhaust flow emanating from the propulsion unit to an exhaust aperture. The exhaust aperture is positioned proximate a trailing edge of the wing assembly, and has an aspect ratio of at least five. In further embodiments, the wing assembly includes a flap member moveably coupled along a trailing edge portion of the wing assembly, and the exhaust aperture is configured to direct the exhaust flow over at least a portion of the flap member.

The invention discloses a crane support leg. The crane support leg comprises a first level horizontal support leg, a second level horizontal support leg and a fixed support leg, wherein the second level horizontal support leg is sleeved on the first level horizontal support leg, and the first level horizontal support leg is sleeved on the fixed support leg; the crane support leg is characterized in that: a first horizontal oil cylinder is arranged between the first level horizontal support leg and the fixed support leg, and a second horizontal oil cylinder is arranged between the second level horizontal support leg and the first level horizontal support leg. The crane support leg has relatively high strength in a half-stretching state, and can obviously improve the hoisting performance of the whole crane. The invention further discloses a support leg hydraulic system for controlling the crane support leg, and a crane provided with the crane support leg.

The invention provides a super lifting device and a flare angle control device thereof, as well as a crane containing the super lifting device. The flare angle control device comprises that a support rod connecting base, and a pin roll connecting hole is arranged on the support rod connecting base; a first super lifting support rod (20), a second super lifting support rod (20'), a third super lifting support rod (40) and a fourth super lifting support rod (40'), and first ends of the first super lifting support rod (20), the second super lifting support rod (20'), the third super lifting support rod (40) and the fourth super lifting support rod (40') can be connected on the support connecting base in a pivot way; and the third super lifting support rod (40) is arranged outside the first super lifting support rod (20), and the fourth super lifting support rod (40') is arranged outside the second super lifting support rod (20'). According to the flare angle control device, the constraint function of the crane arm can be enhanced, and the lifting performance of the crane is further increased.

The invention discloses a method for erecting a girder of a suspension bridge by a double-hoisting hydraulic NC (numerical control) cable crane. The invention is characterized in that: two sets of loaded-walking hydraulic NC cable cranes and a control system are used in a combined manner to sequentially hoist a section of girder of the suspension bridge at the same time so as to erect the girder of the suspension bridge; the two sets of loaded-walking hydraulic NC cable cranes are loaded to carry the girder to complete the erection when the girder of the suspension bridge is erected from the tower end to the downslope part at the midspan; the cable cranes are loaded to carry the girder to complete the erection of a gentle section when the section of the girder is erected from the midspan to the two banks; and the two loaded-walking hydraulic NC cable cranes automatically swing to carry the girder to complete the erection when the cable crane walks to the upslope sidespan with high gradient. The method for erecting the girder of the suspension bridge by the double-hoisting hydraulic NC cable crane is applicable to mountainous areas, shoals and other places where the bridge erecting construction requirement for horizontally carrying the girder of the suspension bridge to the designated erecting position cannot be met.

A multi-wing, multi-engine, multi-hull amphibious aircraft is disclosed. In the illustrative embodiment, the aircraft has an open frame structure without a fuselage.

The invention discloses a method and a device for identifying the working condition of a five-knuckle arm crane with wire ropes. The working condition is automatically identified by additionally arranging a length measuring device for measuring extension elongation of the second knuckle arm and a performance curve; extension elongation information of the second knuckle arm is measured by using the length measuring device and the information is transferred to a host machine of a moment limiter through an aboard communication network of the crane; the host machine of the moment limiter calculates the extension rate of the second knuckle arm according to the length information to further perform intelligent matching according to a program compiled in advance and the performance curve stored in the host machine of the moment limiter to pair the proper performance curve so as to realize intelligent hoisting. The method and device disclosed by the invention overcome the defect that the conventional sequential stretching mode must be strictly operated according to the sequence of an operation procedure, a hoisting arm can stretch arbitrarily, the special demand of the user on different working conditions and hoisting speed is satisfied, and the lifting performance is enhanced.

The invention discloses a comb-finger stereo garage carrying trolley and a method. The comb-finger stereo garage carrying trolley and the method solve the problems that in the prior art, a carrying trolley travels on a fixed track and cannot walk freely on a garage plane, the laying of the fixed track increases the construction cost, and car garage space is wasted. The effects that the comb-fingerstereo garage carrying trolley can be applied to an aisle-stack stereo garage, the handling safety of handling equipment and the transmission ratio of a lifting mechanism are improved, and the utilization rate of garage space is improved are achieved. According to the technical scheme, the comb-finger stereo garage carrying trolley includes a bottom frame and an upper car frame, and a plurality of sets of travelling mechanisms is arranged at the bottom of the bottom frame. The upper car frame is connected with the bottom frame through a plurality of shear type support frames. A lifting and elevating mechanism for controlling lifting of the upper car frame is installed between the upper car frame and the bottom frame. Comb-finger frames are slidably connected to two sides of the upper carframe. The comb-finger frames are controlled by a telescopic mechanism to extend or retract, and after the comb-finger frames are extended, the lifting and elevating mechanism controls the upper car frame to rise, so that a car to be carried is rose and separated from a parking frame.

Apparatus and method are provided for lifting heavy loads beneath the floor of a drilling rig or a platform. A base skid supports tables to which winch bases are attached. Winches, usually four in number, are placed on the winch bases and the cables of the winches are placed through sheaves and attached to a double line bar. Sheaves are attached to a load, such as a blowout preventer. Cradle lines may support a blowout preventer. Load cells may be used with the winch cables.

A lift system for moving a car along a track in a guided manner. The lift system having a guide rail system, a car and a drive unit arranged on the car. The guide rail system forms a closed track along which the car can be moved between floors when in operation. The drive unit has a motor, a gear wheel system connected to the motor by a shaft and a guide disk. The guide rail system has a pinion system and guide edges spaced apart from one another, which cooperate with the guide disk. When in operation, the motor drives the gear wheel system and the gear wheel system acts on the pinion system in order to move the car along the track in a guided manner.