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130results about How to "Reduce lifting force" patented technology

Shroud enclosed inverted surface piercing propeller outdrive

A shrouded outdrive propels a high-speed boat having a hull for high-speed passage through water. The hull has at least one bow at the forward end and at least one transom at the stern. A tubular shaft extends at a small angle (6° to 12°) from the boat transom into the water, and a drive shaft is arranged within the tubular shaft. A propeller is mounted to the drive shaft for partial immersion in the water so that a lower portion of the propeller extends into the water during high-speed floating passage of the boat and a upper portion of the propeller is above the water during high-speed floating passage of the boat. A shroud is arranged about the propeller and is disposed below the water and adjacent the propeller. A mount holds the shroud to form a shroud-enclosed channel during high-speed passage of the boat through the water in which the propeller rotates. A plate horizontal to the undisturbed passing water surface overlies the departure side of the propeller at a radial distance of about two thirds (⅔) of the radius of the propeller. This plate immediately abuts the departure blading of the propeller in the direction of boat movement through the water and assures immersion of the lower pitch departure side of the partially immersed propeller in water for more efficient propulsion. Embodiments are disclosed where the plate is utilized as the necessary support for the shroud. Additionally, both the shroud and the plate can have small angular variations with respect to the surface of the undisturbed surface through which the high-speed hull passes.
Owner:HOWARD M ARNESON TRUSTEE OF THE HOWARD M ARNESON TRUST DATED AUGUST 3 2016

Lever type online safety valve checking device

The invention discloses a lever type online safety valve checking device. One end of a V-type lower rod and one end of the other V-type lower rod are hinged to each other, the two ends of a supporting rod adjusting nut are supported by one end of an upper rod and one end of each lower rod, a groove in a supporting rod upper bolt is hinged to one end of the upper rod, a tension sensor is arranged on the middle point of the upper rod, an iron chain and a clamping device with clamping heads provided with transverse tooth-shaped patterns are hung below the upper rod, a manual hydraulic pump is connected with a single-action hydraulic cylinder, the hydraulic cylinder is located on the open end of the lower rods through a hydraulic cylinder holding board, a hydraulic cylinder ejector rod is in contact with the upper rod, a displacement sensor is installed at the bottom of the hydraulic cylinder, a safety valve body is arranged in protruding V shapes of two pressing rods, and a valve neck of a safety valve is clamped by a locking device; the clamping device can clamp a valve rod of the safety valve, the valve rod of the safety valve and the tension sensor are coaxially arranged, and the displacement sensor and the tension sensor are connected with a data processor through data cables. According to the lever type online safety valve adjusting device, the valve rod is lifted according to the lever principle, the power and the size of a lifting mechanism are effectively reduced, checking is rapid and accurate, the application range is wide, and the checking efficiency can be effectively improved.
Owner:HANGZHOU SPECIAL EQUIP INSPECTION & RES INST

Method for increasing a blade performance (variants)

The invention relates to machine building in particular to blade machines for air injection, in particular to fans and air blowers, and also to blades of different propulsion devices. The inventive method for increasing the blade (1) performance consists in producing a blade (1) in the form of a wing and in carrying out the boundary layer suction on the blade 1 surface on the opposite side with respect to the incoming air flow through a system of slotted holes (4). The blade (1) is provided with a thick airfoil profile. The air suction is carried out through the system of slotted holes (4) embodied along the blade (1) and into cavities (5) which are embodied under said holes (4) along the latter and each of which is provided with a central longitudinal hollow body arranged therein, said body forming an annular channel (7) in each cavities (5) in such a way that a vortex-like flow is generated by the incoming air flow in said channel. The air is sucked out from the cavities (5) and the central bodies (6) through branch channels (8). The latter are used to discharge air outside of the blade (1). The air flowing-off along the cavities (5) and along the blade 1 is limited within the cavities (5) by mounting partitions and on an external surface of the blade (1)—by mounting ribs (9). In another embodiment of the method, the cavity is embodied without the central body (6). As a result, the invention makes it possible to increase the blade performance.
Owner:LNS WINDBLADE TECH LLC +1

Main drive turn-over device and method for super-large-diameter shield tunneling machine

PendingCN110950242AReduce lifting forceRealize the purpose of overturning heavy objectsLoad-engaging elementsControl engineeringElectric machinery
The invention discloses a main drive turn-over device and method for a super-large-diameter shield tunneling machine. The main drive turn-over device comprises an arc-shaped turn-over base, and turn-over parts mounted at the two ends of the turn-over base. The main drive turn-over method comprises the following steps: the lower part of a shield body block serves as the turn-over base; an upward turning part is lifted; lifting lugs are connected for turning over; after a main drive rotates by 90 degrees, hook replacing operation is conducted; after hook replacing is successful, turning over continues; when the main drive rotates by 180 degrees, after a motor and a speed reducer are mounted, lifting hooks are connected, and two lifting parts reversely act till the main drive is located in the vertical position; and the main drive is lowered through hydraulic oil cylinders on the two sides. Previous overall lifting turning-over operation of the main drive is cleverly converted into rotation turning-over operation, when the main drive turns over through the mode, rotation lifting force provided by a crane only needs to overcome rolling friction resistance generated by the self-weight of the main drive, thus the lifting force of the crane can be decreased by about 10 times or above, and the purpose that large heavy objects are turned over by the small crane is achieved.
Owner:TIANHE MECHANICAL EQUIP MFG

Method for increasing a blade performance (variants)

The invention relates to machine building in particular to blade machines for air injection, in particular to fans and air blowers, and also to blades of different propulsion devices. The inventive method for increasing the blade (1) performance consists in producing a blade (1) in the form of a wing and in carrying out the boundary layer suction on the blade 1 surface on the opposite side with respect to the incoming air flow through a system of slotted holes (4). The blade (1) is provided with a thick airfoil profile. The air suction is carried out through the system of slotted holes (4) embodied along the blade (1) and into cavities (5) which are embodied under said holes (4) along the latter and each of which is provided with a central longitudinal hollow body arranged therein, said body forming an annular channel (7) in each cavities (5) in such a way that a vortex-like flow is generated by the incoming air flow in said channel. The air is sucked out from the cavities (5) and the central bodies (6) through branch channels (8). The latter are used to discharge air outside of the blade (1). The air flowing-off along the cavities (5) and along the blade 1 is limited within the cavities (5) by mounting partitions and on an external surface of the blade (1)—by mounting ribs (9). In another embodiment of the method, the cavity is embodied without the central body (6). As a result, the invention makes it possible to increase the blade performance.
Owner:LNS WINDBLADE TECH LLC +1
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