211results about How to "Improve lifting performance" patented technology

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 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.

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.

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.

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 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.

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.

This invention relates to a lattice mast crane with a lattice mast boom to be luffed up in a vertical luffing plane, which comprises a pivot piece, a plurality of lattice pieces releasably connectable with each other, and a head piece. In accordance with the invention, the lattice mast boom includes a first and a second region, wherein in the first region the lattice mast boom includes at least two first strands of interconnected first lattice pieces extending in parallel in longitudinal direction of the boom, which are connected with the pivot piece via a lower cross-beam and with the head piece via an upper cross-beam, and wherein in the second region the lattice mast boom only consists of a second strand of interconnected second lattice pieces.