595results about How to "Improve lifting efficiency" patented technology

A rotor for use on an aircraft has a plurality (N) of rotor blades mounted on a plurality (N) of concentric masts. Each of the rotor blades has a rounded leading edge and a tapered trailing edge. The plurality (N) of concentric masts each operably mount one of the plurality of rotor blades at N different elevations. A locking element selectively locks or unlocks the concentric masts together in a plane of rotation, enabling the angle between any two rotor blades to be variable from 0-360 degrees during flight. A feathering hinge is operably attached to each blade for changing the pitch of each blade with respect to the plane of rotation as controlled by a pitch control mechanism.

A force exerting device having a force exerting structure including a load arm as a first side, pivotable about a load pivot, a resilient member attached to the load arm and to a termination point and forming a second side of the force exerting structure. The third side of the structure is formed by a line from the termination point to the load pivot. A first adjustment mechanism moves the termination point to change the length of the third side of the structure. A second adjustment mechanism moves the termination point in a direction different than the first adjustment direction so the termination point location can cross a substantially plumb line passing through the load pivot. A force modification device may be included to dynamically adjust the resilient member termination point position in response to motion of the load arm.

The invention provides a control method, a control device and a steam cooking device. The control method is used for controlling cooking cavity temperature of the steam cooking device and includes steps of detecting temperature of a cooking cavity of the steam cooking device, controlling operation power of the steam cooking device according to the detected temperature of the cooking cavity so as to control the temperature of the cooking cavity. By the control method, operation power of the steam cooking device can be accurately controlled according to the temperature of the cooking cavity, so that the temperature of the cooking cavity can be controlled, energy consumption caused by fluctuation of the temperature of the cooking cavity is reduced, and steam cooking effect is thereby guaranteed.

A force exerting device having a force exerting structure including a load arm as a first side, pivotable about a load pivot, a resilient member attached to the load arm and to a termination point and forming a second side of the force exerting structure. The third side of the structure is formed by a line from the termination point to the load pivot. A first adjustment mechanism moves the termination point to change the length of the third side of the structure. A second adjustment mechanism moves the termination point in a direction different than the first adjustment direction so the termination point location can cross a substantially plumb line passing through the load pivot. A force modification device may be included to dynamically adjust the resilient member termination point position in response to motion of the load arm.

The invention relates to a variable-speed winch and a foldable type onboard crane comprising the same, relating to the field of winches. The variable-speed winch comprises a variable-speed mechanism, a driving shaft and a driven shaft, wherein the driven shaft is arranged on a stand of the variable-speed winch through a bearing and at the outer side of the driving shaft and is provided with a power output mechanism; the power output end of the driving shaft is provided with a gear locating slot, and the corresponding driven shaft is provided with a locating pin; the locating pin is arranged on the end part of the driving shaft or in the gear locating slot; the variable-speed mechanism comprises a center wheel and a planet wheel; the part of the driving shaft, which is close to the planet wheel, is provided with a radially outwards raised outer spline, and the inner surface of the corresponding variable-speed mechanism is provided with an inner spline; the inner wall of the driven shaft is provided with an inner spline in clearance fit with the outer spline of the driving shaft; and the outer spline of the driving shaft is respectively meshed with the inner spline of the variable-speed mechanism and the inner spline of the driven shaft to form multi-gear variable-speed transmission. The variable-speed winch can realize variable speed of at least two gears and has the advantages of simple structure, convenience for operation, good speed varying effect, small mass and high transmission ratio; and in addition, the foldable type onboard crane with the variable-speed winch has small size and high lifting capacity.

The invention relates to a magnetic levitation rotor wing system and a helicopter with the same and the field of aviation, in particular to the technical field of rotor wings. The magnetic levitation rotor wing system comprises a rotor wing ring (2) and a rail ring (1), wherein the rotor wing ring (2) is connected with a rotor wing propeller point, and the rail ring (1) provides magnetic suspension force for the rotor wing ring (2). Magnetic suspension force provided by the rail ring (1) includes a driving device capable of driving blades to rotate and a suspension device capable of enabling the propeller point to suspend. A first deflection driving mechanism is arranged on the root portions of the blades of the rotor wing so that first deflection angles of the root portions of the blades can be provided, and a second deflection driving mechanism is arranged on the rotor wing ring (2) so that second deflection angles of the points of the blades can be provided. According to the magnetic levitation rotor wing system and the helicopter with the same, only an outside rail ring is needed to drive the rotor wing ring, and the blades are connected by a central connecting component; and the requirement of independent variable pitch of the rotor wing is guaranteed, partial load of the blades is counteracted with one another through the central connecting component, integrality of the rotor wing ring is increased, and working reliability of improved.

The invention discloses a medical transfer sickbed. The medical transfer sickbed comprises a bed body and a transfer frame, wherein the bed body comprises a bed frame, a bed board and a lifting device I, and the bed frame comprises a bed head board, a bed tail board, a supporting plate, supporting legs I, a folding guardrail I and a bottom plate; the lifting device I is arranged on one side of the upper part of the bottom plate, the lifting device I comprises a hydraulic cylinder I, a pressure relief pedal I and a pressing pedal I; the transfer frame comprises a bracket, a lifting device II and rolling wheels II, the bracket comprises a U-shaped frame, a handle, supporting legs II, a bearing frame and a folding guardrail II, and a lifting device II comprises a hydraulic cylinder II, a piston rod II, a pressure relief pedal II, a pressing pedal II and an oil tank II. For the medical transfer sickbed, the lifting devices are arranged on the bed body and the transfer frame, when the bed board is fixed to the bed body or the transfer frame, a patient can be rapidly transferred through the lifting devices, the whole process can be completed only by one nursing person through operating the lifting devices, thus the investment of nursing cost is reduced, the labor intensity of the nursing person is alleviated, and meanwhile, secondary injuries caused when the patient is transferred are avoided.

The invention relates to a high-rise long-span door type truss integral lifting device and a construction method thereof. The device comprises a run-through jack, a steel strand and an anchoring structure, wherein the anchoring structure consists of an upper anchoring structure which is fixed on an arranged upper truss bracket and a lower anchoring structure which is fixed on a lifted truss; the run-through jack is fixed on the upper anchoring structure and is symmetric on the two sides of the arranged upper truss bracket; and the run-through jack and the steel strand integrally lift the lifted truss to a position which is flush with the arranged upper truss bracket. A whole-course dynamic stress monitoring mode is adopted for monitoring while the integral lifting is performed by a lifting unit. In auxiliary measures of the method, an operating scaffold for ground assembly and an overhung scaffold at a lifting point position are only required to be erected, so the measures are extremely few; and the integral lifting process is controlled by a jack travel control computer; and the conventional measurement monitoring and the stress strain monitoring are performed, so the construction safety and the structural safety are guaranteed. The device can be widely applied to door type truss integral lifting construction.

A torque-withstanding drill pipe elevating device is used for a power swivel to perform drill pipe-tripping operation. In the elevating device of the invention, an upper anti-twist device is a clamping stirrup with sides fixed with bolts, the anti-twist device is fixed on the outside wall of the top of an upper connection pup joint; the lower end of the upper connection pup joint is provided with two lugs, a steel plate which is perpendicular to the two lugs is provided with a pinhole; the upper end of a lower connection pup joint is provided with a single lug, the lower end is provided with two parallel and downward suspension bars, the lower ends of the two suspension bars are welded on the outside wall of the annulated column of a main clamping block; an auxiliary clamping block is locked on the main clamping block through shear pins; and the slip insert of a lower anti-twist device embraces closely a drill pipe coupling to ensure that the drill pipe coupling can rotate with the main clamping block and the auxiliary clamping block. The effects of the invention are as follows: the drill pipe can be firmly clamped during drill pipe-tripping operation; hydraulic dynamic chain tongs are used to complete the screwing operation when the drill pipe and a connection pipe pile are screwed on or screwed off, and the power swivel is used to complete the unscrewing operation between the drill pipe and the connection pipe pile through the drill pipe elevating device, thus increasing the efficiency of the drill pipe-tripping operation.

The invention discloses a double-stage variable-speed oppositely-rotating axial flow pump flow passage component for water spraying propelling. A primary-stage impeller is in an inducer mode. The rotating direction of the primary-stage impeller is opposite to the rotating direction of a secondary-stage impeller. The rotating speed of the primary-stage impeller and the rotating speed of the secondary-stage impeller are different so as to meet the cavitation performance requirement and the lift efficiency requirement respectively. The ratio of the rotating speed n1 of the primary-stage impeller to the rotating speed n2 of the secondary-stage impeller is between 1 and 2. The boss diameter ratio dh to D of the primary-stage impeller is between 0.25 and 0.6. According to the double-stage variable-speed oppositely-rotating axial flow pump flow passage component for water spraying propelling, a double-stage variable-speed oppositely-rotating axial flow pump is good in cavitation resistant performance, high in lift efficiency and compact in structure, expands the use range of a traditional axial flow pump, and is applicable to the water spraying propelling fields with the operating requirements of good cavitation resistant performance, high lift efficiency, compact structures and the like.

A first rope adjusting device is used for adjusting the length of a first rope in a multi-rope friction hoisting system, and can rapidly adjust the length of the first rope in a certain range to compensate for the length change of the first rope. When a multi-rope friction hoisting machine is used for double-hook hoisting, two hoisting containers can not arrive at fixed loading / unloading positions at the same time in general due to the continuous extension of the first rope during the hoisting, so that loading / unloading operations can not be carried out in the two containers at the same time, which results in long loading / unloading time and low hoisting efficiency. In order to solve the above problem, the first rope adjusting device (shown in figure 1) is arranged between the hoisting containers and a first rope hanging device according to the technical scheme adopted by the invention; and the length change of the first rope can be compensated by adjusting the length of the device, which is equivalent to adjust the length of the first rope, so that the two hoisting containers can accurately arrive at the loading / unloading positions to carry out loading / unloading operations at the same time, thereby improving the hoisting efficiency.

The invention discloses a turbine lifting device for fluidized exploitation of natural-gas hydrate. The turbine lifting device comprises an upper joint, a turbine pump, a bridge-type channel, a universal-shaft assembly, a turbine motor and a lower joint, wherein the upper joint is connected with the turbine pump and a sleeve; the bridge-type channel is connected with the turbine pump and the turbine motor; the upper part of the universal-shaft assembly is connected with a central shaft of the turbine motor, and the lower part of the universal-shaft assembly is connected with a central shaft ofthe turbine pump; the universal-shaft assembly is positioned in a sealing cavity of the bridge-type channel; the lower joint is connected with the turbine motor and a sleeve. The turbine lifting device disclosed by the invention has the beneficial effects that power can be provided for jet crushing and mechanical crushing of the hydrate and lifting of hydrate slurry simultaneously, so that the drilling-down time and the cost can be saved and the development period can be shortened; the turbine motor and the turbine pump are used as power and lifting equipment, so that the operation of the turbine lifting device is smooth; the gas lift effect can be achieved by utilizing the phase-stage change of the hydrate, and the energy utilization efficiency and the lifting efficiency can be improved.

The invention discloses a gate system for a hydropower station. The gate system comprises an arc-shaped gate, a driving device and a control circuit, wherein a travel switch and a rack which is used for driving the gate are arranged on the gate; the driving device comprises a driving gear and a variable frequency motor which is in linkage with the driving gear, the driving gear matches with the rack on the gate, and a contracting brake device is arranged on a spindle of the driving gear and serially connected in a circuit where the variable frequency motor is located; and the control circuit comprises an emergency power supply S, a programmable logic controller (PLC) control switch K1 and an accident open button K2, and the emergency power supply S, the PLC control switch K1, the accident open button K2 and the contracting brake device are sequentially connected in series to form a closed circuit. According to the structure, the gate can be opened successfully in case of an emergency through self-gravity, and serious consequences are avoided.

The invention provides an automatic lifting device for gluing and potting. By the adoption of the automatic lifting device, the technical problems that a traditional lifting machine is big in size, a transmission mechanism is complex, lifting is unstable, the lifting efficiency is low, automatic control over a production line is difficult to achieve, and the application occasions are limited are solved. The automatic lifting device is provided with a base. Vertical lifting shafts are fixedly arranged on the base. Linear bearings are arranged on the vertical lifting shafts. A working platform is arranged above the base. The working platform is fixedly connected with peripheries of the linear bearings on the vertical lifting shafts. A parallel thrust plate is further arranged on the base. A sliding connection device is arranged between the parallel thrust plate and the base. Roller seats are fixed to the parallel thrust plate. Thrust rollers are supported by the roller seats. Wedge-shaped lifting thrust bases are fixedly arranged on the bottom surface of the working platform. The thrust rollers are in rolling connection with the wedge-shaped surfaces of the wedge-shaped lifting thrust bases. A parallel movement thrust device is arranged on one side of the parallel thrust plate. The parallel movement thrust device is connected with the parallel thrust plate through a connector. The automatic lifting device can be broadly applied to the fields of gluing and potting.

Improved supersonic laminar flow wing structure, on a supersonic aircraft, having one or more of the following:strake extending forwardly of the wing inboard extent,raked wing tip,reversed fillet at strake or fuselage junction,inboard leading edge flap extending over less than about 15% of the inboard wing panel span,hybrid plain-split flap having a lower surface portion deflectable downwardly relative to plain flap extent.

The invention is an annular ducted lift fan system for a VTOL type aircraft. In detail, the invention comprises an annular duct, a lift fan set, engines, a central fuselage, a peripheral wing, and means for pneumatic coupling or mechanic coupling of engines and the lift fan set. The lift fan set is mounted in the annular duct and powered by the engines through pneumatic coupling or mechanic coupling. The annular duct is opened with the lift fan set working to provide high lift efficiency in VTOL mode and transition mode and is closed off to reduce drag in cruise mode.

The invention discloses a multi-rotor type aircraft. The multi-rotor type aircraft comprises a bracket and a main motor which is mounted on the bracket, wherein the main motor comprises a first main motor and a second main motor which are coaxially arranged; the first main motor and the second main motor are respectively connected with first main screw propellers and second main screw propellers; at least three secondary screw propellers surround around each main motor and are mounted on the bracket. According to the multi-rotor type aircraft, large screw propellers are driven by main motors which are used as engines, so that the lifting efficiency is high; the main motors are coaxially arranged; the two pairs of main screw propellers rotate in reverse directions, so that the large torque is offset; the main motors are arranged in the center of an aircraft body, so that the vibration influence is minimized; the gestures and actions of the aircraft body are controlled by the secondary motors, so that the power consumption is reduced; if the aircraft accidently crashes in the takeoff and landing stages, the secondary motors and small screw propellers at the periphery are firstly damaged, so that the main motors and the main screw propellers in the center of the aircraft body are protected, and thus the maintenance cost and difficulty are greatly reduced.

The invention discloses equipment, a method and a system used for lifting a variable frequency motor and engineering machinery equipment. The self-adaption constant-power speed-regulating equipment comprises a receiving device and a control device, wherein the receiving device is used for receiving information used for indicating the output torque of the motor under a stable rotating speed state;and the control device is used for computing the frequency reciprocal to the output torque according to the output torque and the rated power and the number of pole-pairs of the motor, and outputtingthe frequency to control the motor to run according to the frequency. According to the equipment, the torque of a current load converted into an output shaft of the motor can be determined by the output torque of the motor under the stable rotating speed state, the frequency of the motor, reciprocal to the output torque, can be computed according to the torque, and then the motor is controlled torun according to the frequency, so that the lifting frequency can be lifted substantially under the condition of ensuring the safety, and the variable frequency motor can run at low speed when the load is large, and can run at high speed when the load is small.

The invention discloses an aircraft which comprises a controller, wherein the controller is uniformly provided with and connected with a lifting propeller 1, a lifting propeller 2, a lifting propeller 3, a lifting propeller 4, a horizontal propeller 1, a horizontal propeller 2, a horizontal propeller 3 and a horizontal propeller 4. The lifting of the aircraft mainly depends on the cooperation of the four lifting propellers, and the intelligent lifting can be realized comprehensively by individual control on each lifting propeller caused by the lifting controller, so that the lifting efficiency of the aircraft is high, and the lifting stability is good. The horizontal motion of the aircraft is achieved mainly through the cooperation of the four horizontal propellers, the operation and control technique requirements on operators are not too high, and compared with the traditional aircraft, the horizontal motion flexibility of the aircraft is improved greatly. Through the individual and cooperative control on the four lifting propellers and the four horizontal propellers of the aircraft, the flying flexibility and flying stability of the aircraft are improved.

The invention provides a crane, and belongs to the technical field of engineering machinery. The crane comprises a lifting arm, a driving cab, a machine frame and a walking device, wherein the crane is provided with a push shovel which can level an uneven ground and provide a horizontal support to the crane through stable standing of the crane; the lifting arm consists of multiple movable joints and a hydraulic device, up-and-down and front-and-back movement of a lifting hook can be achieved, the whole lifting arm sits on the rotating hydraulic device, and 360-degree rotation of the lifting arm can be achieved. The crane provided by the invention has a more flexible lifting position, can achieve safe lifting in a variety of complex environments, and has high lifting efficiency and good security.

The invention discloses a long-pole spreader comprising a hanging ring (1), a hanging wheel rack (4), and hanging wheels (9). The hanging ring (1) and the hanging wheel rack (4) are rigidly connected through a connection pipe (3). A handle (12) which can slide between the first working position and a second working position is arranged on the connection pipe (3). A latch mechanism is arranged on the hanging wheel rack (4). The latch mechanism is connected with the handle (12) through a traction device. When the handle (12) is at the first working position, the latch mechanism extends out and shields wheel grooves of the hanging wheels (9). When the handle (12) is at the second working position, the latch mechanism retracts and leaves the wheel grooves of the hanging wheels (9). According to the long-pole spreader provided by the invention, the long rigid connection pipe is arranged between the hanging ring and the hanging wheel rank, and the latch mechanism is provided on the hanging wheel rank, such that the distance between operators and specific objects is ensured, and the operators are prevented from the harm of radioactivity or toxicity. Also, specific object lifting operation safety and reliability are ensured.

The invention discloses a method and system for obtaining online real-time data of the dynamic liquid level of a pumping unit. The method includes: obtaining the data of the dynamometer diagram and analyzing and processing the data of the dynamometer diagram; calling the dynamic fluid level according to the data of the dynamometer diagram The calculation module calculates the dynamic fluid level data; the method and system provided by the application can calculate the dynamic fluid level data of the pumping well by monitoring the real-time data of the dynamometer diagram, and obtain the real-time data of the dynamic fluid level. The acquisition of real-time data on the dynamic liquid level provides timely data support for improving the lifting efficiency of the oil well and strengthens the management of the wellbore.

The invention discloses a steel beam lifting fastening type special clamp, and belongs to the field of engineering lifting tools. The steel beam lifting fastening type special clamp comprises a supporting and lifting component, a pressing and adjusting plate, a lifting lug and a bolt, wherein the supporting and lifting component is a structural body with two orthogonal connection plate bodies, a through hole is formed in a horizontal plate body of the two plate bodies, the lifting lug for lifting the through hole is arranged at the upper end of a vertical plate body of the two plate bodies, and an adjusting through hole is formed in the vertical plate body below the lifting lug; a through hole is formed in the pressing and adjusting plate, and the rear end of the pressing and adjusting plate is an adjusting and limiting part matched with the adjusting through hole of the vertical plate body of the supporting and lifting component; the adjusting and limiting part of the pressing and adjusting plate is movably arranged in the adjusting through hole of the vertical plate body of the supporting and lifting component, and space between the pressing and adjusting plate and the horizontal plate body of the supporting and lifting component is a clamping space; the bolt penetrates through the through hole of the pressing and adjusting plate and the through hole of the horizontal plate body of the supporting and lifting component. According to the steel beam lifting fastening type special clamp disclosed by the invention, the lifting lug is arranged at the upper end of the supporting lifting component, and the lifting lug is not under a lateral force in a steel beam lifting process, so that the deformation of the clamp is avoided, the safety is improved, and the reutilization is facilitated.

The invention belongs to the field of general aircrafts, and particularly relates to an electrodynamic multi-rotor helicopter. The electrodynamic multi-rotor helicopter comprises a fuselage, power rotors, a rotor support arm, a undercarriage, an electric supply system and a flight control system, wherein even power rotors are arranged above the fuselage, each power rotor is installed on the upper part of the fuselage through the rotor support arm, the undercarriage is arranged at the lower part of the fuselage, the electric supply system and the flight control system are respectively installed in a battery cabin and a cockpit in the fuselage; the structures of the power rotors are the same, and the power rotor comprises a screw propeller, a drive motor and fairings; the drive motor is installed on the fuselage through the rotor support arm, the screw propeller is connected with the output end of the drive motor, and fairings are respectively arranged at the lower end of the drive motor and the upper end of the drive motor above the screw propeller. The helicopter disclosed by the invention is compact in structure, flexible in movement, and large in lift-weight ratio, and has the advantages of being strong in adaptability, safe and reliable, economical, environment-friendly, simple in control, and low in maintenance charge.

The invention relates to vehicle entering equipment of garages, in particular to a stereo-garage vehicle storing and taking system. The stereo-garage vehicle storing and taking system comprises a rotary lifting platform and a vehicle getting and sending positioning platform which is arranged inside the rotary lifting platform; the rotary lifting platform is composed of a rotary supporting platform, lifting mechanisms and lifting devices, and the vehicle getting and sending positioning platform is composed of a platform trolley, a lifting adjusting frame and a positioning supporting arm. According to the stereo-garage vehicle storing and taking system, multiple-stroke oil cylinders are adopted to achieve rapid pushing and vehicle positioning functions, toothed bars and speed reducers are adopted and work in a directly matched mode so that rapid and stable lifting and rotating functions can be achieved, vehicles get in and out more rapidly through the vehicle getting and sending positioning platform, the lifting mechanisms and the lifting devices are perfectly combined so that lifting efficiency of the whole platform can be increased greatly, and the whole system is more suitable for a stereo garage of a cylindrical structure; the failure rate is lower, power is output more directly, a transmission process is simplified, unnecessary equipment is omitted, and the stereo-garage vehicle storing and taking system is simple in overall structure and convenient to operate and maintain.

The invention discloses a retractable type movable hoisting platform and a ship comprising the same.The retractable type movable hoisting platform comprises a portal frame, a platform and a retractable system.The platform is arranged at one end of the portal frame, and multiple platform lug plates are hinged to the end, close to the portal frame, of the platform.The retractable system is installed between the portal frame and the platform and used for enabling the platform to rotate relative to the vertical portal frame, so that the platform is switched between a horizontal state and a vertical state.The ship comprises a cabin wall and a storeroom deck.The storeroom deck extends outwards from the cabin wall.The ship comprises the retractable type movable hoisting platform.By adopting the retractable movable hoisting platform, great convenience is brought for achieving safe goods hoisting.

The invention relates to a turning device, specifically speaking, relates to a coiling iron core overturning and hoisting apparatus. The apparatus comprises the following components: a hanger, a connector, a suspension rod, a connecting rod, a connecting rod bolt component, a suspender main body, a chute, a L shaped support, a revolving axle, a clamping block, a bulb plunger, a rapid clamp, a support bolt component, a connection shaft, a handle, rotating arm and a positioning plunger; the hanger is connected to the connector, and the suspension rod traverses the connector, and the connector and four-piece connecting rods are connected by two revolving axles, and the connecting rod is divided into two groups, and the other end of each group of connecting rod is connected by the bolt component and two L shaped supports, and two L shaped supports form a group, and the bolt component is provided with two bearings, and the bearing is positioned in the suspender main body chute. The technical schemes of the invention have the following beneficial effects: the hoisting speed is fast without workpiece damage; the apparatus occupies a small area of place and saves working hours with high hoisting and overturning efficiencies.