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9465 results about "Conical surface" patented technology

In geometry, a (general) conical surface is the unbounded surface formed by the union of all the straight lines that pass through a fixed point — the apex or vertex — and any point of some fixed space curve — the directrix — that does not contain the apex. Each of those lines is called a generatrix of the surface. Every conic surface is ruled and developable. In general, a conical surface consists of two congruent unbounded halves joined by the apex.

Gatherer of deep soil of moon

ActiveCN102359891APrevent leakageRecycling is simple and reliableWithdrawing sample devicesMotor driveLunar soil
The invention discloses a gatherer of deep soil of the moon. An upper end surface of a housing of the gatherer is provided with a drilling machine and mechanical arm connecting device. A first separator plate, a second separator plate and a third separator plate are installed in the housing from top to bottom. A screw driving motor is installed on the first separator plate and drives a screw by a gear. A slide block in cooperation with the screw is fixed on a slider. Four guide rods pass through four through holes located at an end of the slider. A drill pipe driving motor is installed in the middle of the four guide rods. The drill pipe driving motor drives a drill pipe connector by a gear. Electromagnet driven wedges are arranged in the drill pipe connector. The electromagnet driven wedges stretch out from pin grooves of inner conical surfaces of corresponding drill pipes. A drill pipe rotating disk is installed in the center of the second separator plate. The drill pipe rotating disk is in cooperation with a drill pipe rotating disk driving motor by a gear. The third separator plate is arranged under a clamping device. Multiple drills are installed on a drill rotating disk along a circumferencial direction. On the third separator plate, a drill rotating disk driving motor is in cooperation with the drill rotating disk by a gear. A lunar soil bag is enclosed in the drill pipes having hollow structures. The gatherer of deep soil of the moon has the characteristics of compact structure, small floor space, high reliability of a transmission mode, large drilling and production depth, large sampling amount and simple and reliable sample recovery.
Owner:ZHEJIANG UNIV

Cooling electronics via two-phase tangential jet impingement in a semi-toroidal channel

A two-fluid-phase cooling device for absorbing high thermal flux from electronics devices and other thermally dissipating devices. It consists of a thermally conductive plate with thermally dissipating elements on one face and a semi-toroidal cavity in the opposite face with the cavity's axis perpendicular to the face of the plate, a liquid refrigerant supply tube ending in a thermodynamic cycle's refrigeration expansion valve that directs jets of liquid to impact the conical surface in the center region of the semi-toroidal cavity in a direction along the cavity's axis and tangent to the conical surface, a second plate with a semi-toroidal protrusion extending into the semi-toroidal cavity to form a thin, semi-toroidal channel between the two plates, and a seal between the liquid supply tube and the second semi-toroidal plate. In operation liquid refrigerant jets strike the conical surface generally tangential to the surface and flow at high velocity in a thin film on the surface of the semi-toroidal cavity from its center radially to the outer edge of the toroidal channel, absorbing heat and boiling as it does so. The high radial acceleration forces caused by the liquid film moving at high velocity on the cavity's concave surface force the liquid film against the surface and create a pressure gradient that biases evaporation toward the liquid / vapor interface. The vapor moves parallel to the liquid flow radially outwards between the liquid film and the surface of the semi-toroidal protrusion at very high velocity, causing extreme turbulence in the liquid film and highly augmented heat transfer between the heated plate and the liquid film, while the liquid film nevertheless remains intact and forced against the heated surface by radial acceleration and carried to a distance significantly greater than in conventional jet impingement systems. The device may also be composed of wedge-shaped sections of the semi-toroidal plates. It may further have two expansion valves in series in the liquid supply line, the first generating a small amount of vapor (increase in quality) so the resulting increase in flow volume greatly increases the velocity through the second expansion valve toward the heated surface to further enhance heat transfer.
Owner:HOANG TRIEM T +1
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