34results about How to "Reduce vertical force" patented technology

The invention provides a tiltrotor controlled by a double-propeller vertical duct. The tiltrotor, using the design of parallel twin-rotor and conventional aerodynamic configuration, consists of a fuselage, straight wings, rotors, a nacelle, an aileron, a vertical empennage, a rudder, an elevator, a horizontal empennage, a duct end cover, a vertical duct, an undercarriage, a power and decelerationsystem, a propeller power input shaft, a lower propeller, an upper propeller, louver-type slipstream sheets, a propeller gearing and collective-pitch controlling device, a propeller gear box supporting structure, a duct end cover driving device, a duct end cover motion slide rail and a slipstream sheet controlling device. Compared with the cyclic pitch control mode, the tiltrotor of the inventionsimplifies the operations during the vertical flight and the flight conversion and improves the reliability by using the structure of the double-propeller vertical duct to control the vertical flightand the conversion of the flight mode, and the tiltrotor has the advantages of long control force arm, high control efficiency and simple structure. Therefore, the tiltrotor constitutes a novel aircraft with significant development potential and promising future.

A positioning mechanism of a bed comprising height adjustable lifters (1, 2, 3) that are mounted on the undercarriage (4) and connected to the patient surface frame (5). The first lifter (1) is arranged that its axis intersects the longitudinal axis (6) of the frame (5) and the said lifter (1) is connected to frame (5) oscillatingly around the longitudinal axis (6) of the frame (5) and in a sliding way in the direction of the longitudinal axis (6) of the frame (5). The second lifter (2) and the third lifter (2) are interconnected with an arm (10), oriented transversally to the longitudinal axis (6). The arm (10) is oscillatingly connected to the frame (5) and is connected at one end to the second lifter (2) both oscillatingly around an axis, in parallel with the longitudinal axis (6) of the frame (5) and in a sliding way transversally to the frame (5). At the other end the arm (10) is connected to the third lifter (3), oscillatingly around the axis, in parallel with the longitudinal axis (6) of the frame (5).

In order to control a behavior generated on a body as a result of a travel of a vehicle, an electronic control unit controls rotation of each of in-wheel motors, thereby generating a predetermined braking force or driving force approximately the same in magnitude on each wheel. Meanwhile, the electronic control unit uses respective pipelines and a direction control circuit depending on the behavior generated on the body to connect fluid pressure cylinders on a fluid pressure supplying side and fluid pressure cylinders on a fluid pressure supplied side to each other for communication. As a result, the fluid pressure cylinders convert vertical forces of the body acting as component forces of a predetermined braking/driving force into hydraulic pressures and supply the fluid pressure cylinders with the hydraulic pressures, and the fluid pressure cylinders convert the supplied hydraulic pressures into vertical forces, thereby exerting the vertical forces on the body.

The invention provides a large-caliber heat-supply pipeline uncompensated cold mounting method, comprising the following steps: digging a groove for arranging a heat-supply pipeline, and filling sand into the groove; mounting the heat-supply pipeline and a corresponding pipeline accessory into the groove; carrying out backfilling on the groove; wherein, the direct-buried net depth of the heat-supply pipeline is more than 1.7m; the pipeline accessory comprises an elbow with a large bending radius, bevel angles, a three-way pipe, a tapered pipe, and a valve; wherein, the bevel angles comprise a plurality of small bevel angles smaller than 1 degree or the elbow the radius of which is more than 5.0DN can be used for replacing; moreover, the mounting method provided by the invention is led to be suitable for paving the heat-supply pipelines the main tubular diameters of which are more than DN1000 by the processing technology on each node of the pipeline; moreover, the invention is simple to be mounted, has short construction period, reduces the maintaining cost, and is safe and reliable.

The present flying ski is designed to be towed behind a conventional powered watercraft by a standard ski tow rope or similar device having a handle that can be held by a human rider. In use, the rider is seated on the seat of the flying ski and towed by the watercraft. The improved flying ski comprises an elongate board and a seat that extends generally perpendicular to and upward from the board to support the seated rider's buttocks. The seat preferably includes a flexible C-shaped member for absorbing impacts during use. The rider's legs extend toward the front of the board and are secured by a pair of foot holders that attach to the board. An elongate strut extends downward from the board and couples the seat to a planing blade. The elongate strut is preferably formed with a V-shape wherein the length from the front edge to the back edge of the strut is greater along an upper portion for enhanced structural integrity. The planing blade advantageously has a front blade and a rear blade interconnected by a fuselage. The rear blade may be located above the front blade for avoiding turbulence from the front blade. The present flying ski accommodates a variety of rider skill levels by incorporating a mechanism and system that allows the rider to selectively adjust performance characteristics of the ski. In particular, the rider can control stability, lift and maneuverability characteristics to accommodate the rider's particular skill level and the particular challenge that the rider seeks. The position of the rear blade may be moved forward or backward to change the hydrodynamic characteristics of the flying ski. In addition, the present flying ski includes a detachable back support that allows handicapped riders to enjoy the thrills of using the ski. The present flying ski also provides for quick and easy attachment and detachment of component parts of the ski. This feature allows the ski to be more easily transported when not in use and reduces the risk of accidentally dropping or otherwise damaging the ski.

A connector (C) is formed by insert molding such that terminal fittings (10) are embedded in a housing (20). A connecting portion (10A) provided at the front end of the terminal fitting (10) for connection to a mating terminal fitting projects forward from the housing (20) and a part of the terminal fitting (10) located behind the connecting portion (10A) is embedded in the housing (20). A seal (15) is provided in close contact with an embedded portion (10C) of the terminal fitting (10) embedded in the housing (20) and a resilient portion (19) is provided at a position before the seal (15) and outside the housing (20).

The present flying ski is designed to be towed behind a conventional powered watercraft utilizing a standard ski tow rope or similar device having a handle that can be held by a human rider. In use, the rider is seated on the seat of the flying ski and towed by the watercraft. The improved flying ski comprises an elongate board and a seat that extends generally perpendicular to and upward from the board to support the seated rider's buttocks. The seat preferably includes a flexible C-shaped for absorbing impacts during use. The rider's legs extend toward the front of the board and are secured by a pair of foot holders that attach to the board. An elongate strut extends downward from the board and couples the seat to a planing blade. The elongate strut is preferably formed with a V-shape wherein the length from the front edge to the back edge of the strut is greater along a top end portion for enhanced structural integrity. The planing blade advantageously has a front blade and a rear blade interconnected by a fuselage. The rear blade may be vertically displaced from the front blade for reducing the effects of turbulence from the front blade. The present flying ski also accommodates a variety of rider skill levels by incorporating a mechanism and system that allows the rider to selectively adjust performance characteristics of the ski. In particular, the rider can control stability, lift and maneuverability ski characteristics to accommodate the rider's particular skill level and the particular challenge that the rider seeks. More particularly, the position of the rear blade may be selectively movable with respect to the fuselage to change the hydrodynamic characteristics of the flying ski.

The invention discloses a vertical force control method of a magnetic flux reverse permanent-magnet linear motor. The method comprises a vertical force optimal algorithm and a control switcher, wherein the vertical force optimal algorithm comprises the steps of establishing an auxiliary function to obtain optimal d and q axis current, and obtaining minimum copper loss and vertical force under the condition of keeping push force unchanged during steady-state operation, so that the working efficiency and performance of the motor are improved; the control switcher adopts a control mode that the d axis current is zero in a dynamic stage, and adopts a vertical force optimal control mode in a steady stage. The method is rapid in response and easy to carry out.

The present invention relates to a vehicle seat system for reduction of vertical peak acceleration of a person seated in a vehicle seat during impact. The vehicle seat system comprises a seating structure and a trim at least partially enclosing the seating structure. The trim is releasably fastened to the seating structure by means of interconnected trim fastening means comprising at least two parts adapted to release from each other when the vertical peak acceleration exceeds a predetermined limit value, subsequently reducing the vertical peak acceleration. The present invention further relates to a vehicle comprising the vehicle seat system.

A heat sink connector pin includes a pin assembly with linkage that provides the movement of a pin head or cap in a downward movement to cause multiple movable fingers at an opposing end of the pin to mechanically move from a retracted position that allows insertion of the heat sink connector pin through an opening in the substrate, such as a through-hole, to move to an outward extended position so that the multiple fingers engage or grasp a bottom surface of the substrate. In one example, the movable fingers are rotatably connected to share a same rotational axis with each other. In one example, the pin assembly includes a sleeve adapted to receive the shaft structure and is adapted to engage with the pin head. The sleeve includes a substrate stop surface adapted to contact a top surface of the substrate during insertion of the pin through the substrate.

The invention relates to an electric propulsion Yangtze-river vehicle passenger ferryboat. The electric propulsion Yangtze-river vehicle passenger ferryboat comprises a deck structure, an upper-layercabin body, springboard structures and a hanging bracket structure; the deck structure comprises a deck, a lifting block, a hydraulic cylinder, a clamping block, a driving motor and a gear box, wherein the upper-layer cabin body is arranged in the middle of the deck structure, and a ventilation exhaust device is arranged on the top plate of the upper-layer cabin body; a plurality of damping seatsare arranged on a bottom plate, each damping seat comprises a seat body and a damping base; the springboard structures are arranged at the two ends of the deck structure, and each springboard mechanism comprises a hanging bracket, a fixed pulley support, a fixed pulley, a motor shell, a winding motor, a steering wheel support, a steering wheel, a hinge support, a springboard, a connecting ring, asteel wire rope, an inclined pull rod, a locking block and a locking cylinder; and the hanging bracket structure is arranged on the upper surface of the deck structure. According to the electric propulsion Yangtze-river vehicle passenger ferryboat, the deck structure, the upper-layer cabin body, the springboard structures and the hanging bracket structure in an aqueduct structure are designed in atargeted manner, the integral structure is high in practicability, and the functionality is strong.

The invention discloses a water-cooling furnace mouth. The water-cooling furnace mouth comprises a furnace mouth body and a cooling water pipe arranged in the furnace mouth body, wherein the top surface of the furnace mouth body is a slope, and the vertical position on the outer edge on the top surface is lower; and the inner ring surface of the furnace mouth body is a slope, and the vertical position on the outer edge on the inner ring surface is higher. In the invention, the top surface is designed into the slope, thereby being more conductive to slag removal and being easy to clear steel slag; and the inner ring surface is designed into the slope, thereby being more favorable for hanging the slag on an inner ring, facilitating the protection of an inner ring body and avoiding premature cracking. Practices prove that: during the initial stage of using the water-cooling furnace mouth, the phenomena of deformation, cracking and water leakage are avoided, the service life of the furnace mouth is greatly prolonged, and the water-cooling furnace mouth in the structure design form can meet the using requirements of a furnace life. The invention further discloses a converter with the water-cooling furnace mouth.

The invention belongs to the field of dam projects and relates to a caisson. The invention adopts the technical scheme that the triangular caisson is formed by wholly connecting side plates, a bottom plate and sealing plates at the two ends into a box body structure and filling backfill materials; the side plates at the two sides are connected according to node structures; the cross section is approximate to a triangle; the included angles among the side plates and the bottom plates are not more than 60 degrees; the whole caisson is approximate to a triangular prismoid; and when the wave at the front of a dam is greater, the included angles among the side plates and the bottom plate are not more than 45 degrees, i.e., the slope of each side plate is not more than 1:1. The triangular caisson has the technical effects that the project amount of reinforced concrete and the backfill materials per meter of track are obviously less than those of the prior art, the foundation pressure is low and uniform, the overall stability is good, and the practicability, the stability against overturning and the stability against sliding of a soft-soil foundation are greatly improved. The triangular caisson is applicable to the field of the dam projects in regulating buildings, breakwaters, sand control dams and the like.

The invention provides a compound stranded aluminum alloy cable and a preparation method and application thereof. The compound stranded aluminum alloy cable sequentially comprises a conductor, an insulating layer and a sheath from inside to outside along the radial direction, wherein the conductor is formed by twisting one central unit and six peripheral units in the left direction, and the central unit is located in the center of the peripheral units. The central unit is formed by leftwards twisting one steel wire rope and six category 5 aluminum alloy strands, and the steel wire rope is located in the center of the category 5 aluminum alloy strands; the peripheral unit is formed by leftwards twisting seven category 5 aluminum alloy strands; and the five types of aluminum alloy strands are formed by twisting 30-40 aluminum alloy monofilaments in a rightward bunching manner. The compound stranded aluminum alloy cable provided by the invention has relatively good torsion resistance, flame retardance, salt spray resistance and mildew resistance, and is suitable for being used as a cable for wind power generation.

The invention discloses a combined infiltration farmland groundwater runoff nitrogen and phosphorus intercepting and removing device with a triangular-prism-shaped high molecular material infiltration net as the main part and with rice hulls and permeable geotechnical cloth as the auxiliary parts and an application method of the combined infiltration farmland groundwater runoff nitrogen and phosphorus intercepting and removing device, and belongs to the technical field of farmland groundwater runoff nitrogen and phosphorus intercepting and removing methods. The farmland groundwater runoff nitrogen and phosphorus intercepting and removing combined infiltration device based on the triangular-prism-shaped high molecular material infiltration net comprises an inner triangular prism inner support made of PVC or PE, and an outer portion is formed in the manner that the periphery of the support is wrapped by the high molecular material infiltration net, the permeable geotechnical cloth, the rice hulls and other materials from interior to exterior. The invention further discloses the application method of the above infiltration device. The infiltration device is simple in structure, convenient to construct, long in service life, good in sludge plugging preventing capability and good in drainage effect, has a good nitrogen and phosphorus pollutant intercepting and removing effect and has an important significance for improving the quality of agricultural water in China and relieving the water eutrophication condition. Meanwhile, the infiltration device can treat a large amount of agricultural waste as well, materials are free of toxicity and pollution, energy saving and environment friendliness are achieved, and cost is low.

The invention discloses a piston mechanism and a spherical tooth hob with a water jet assisted rock breaking function. The piston mechanism comprises a piston cylinder, a piston and an elastic piece, the piston cylinder is of a hollow tubular structure, a sealing partition plate is arranged in the piston cylinder, and the interior of the piston cylinder is vertically divided into a movable cavity and a pressure cavity through the sealing partition plate; the piston penetrates through the sealing partition plate and is movably arranged in the piston cylinder, a limiting block is arranged at the end, protruding out of the pressure cavity, of the piston, the limiting block seals an opening of the pressure cavity in the natural state, and a piston probe is arranged at the position, located in the movable cavity, of the piston; and the elastic piece is arranged below the piston and abuts against the limiting block, and the piston probe always protrudes out of the opening of the movable cavity in the natural state under the action of the elastic piece. By means of the piston mechanism and the spherical tooth hob, water jet can be ejected from the peripheries of arranged spherical teeth, starting and stopping of the water jet are controlled through a pure mechanical structure, the reliability is high, abrasion of the spherical tooth hob can be reduced, and the rock breaking efficiency is improved.

The invention discloses an upper layer cabin structure of an electric propulsion Yangtze River vehicle passenger ferry. The structure comprises a top plate, a bottom plate and four-sided walls defining a cuboid cabin space, wherein a ventilation exhaust device is arranged on the top plate, the ventilation exhaust device comprises a vent pipe, an air inlet fan, a heater, induced draft fans, an exhaust pipe, an exhaust fan, a water tank, a water pump and an atomizer, the vent pipe is disposed on the top plate, one end of the vent pipe penetrates through the wall at one end of the top plate and is provided with an air inlet, the air inlet is provided with a filter screen, the air inlet fan is arranged at the air inlet of the vent pipe, the bottom of the vent pipe is provided with a pluralityof air outlets, each air outlet is provided with one induced draft fan, the bottom of the vent pipe is provided with an electric appliance box, an electric appliance is provided with the heater, the heater is provided with a metal heating pipe, the metal heating pipe penetrates through the bottom of the vent pipe to be arranged in the vent pipe, air in a cabin is guaranteed to flow smoothly, the air in the vent pipe can be heated, so that the phenomenon that outside cold air enters into the cabin and the abrupt temperature drop in the cabin is caused is prevented.