A device and a method for reducing wind resistance power of a large geotechnical centrifuge are provided. A semicircular tube cylindrical cooling device is installed between an internal side of a high-speed rotor system and a cylindrical shell. A serpentine top semicircular tube cooling plate is provided right above a hanging basket, and return helium gas inlet holes are opened at a center of the top semicircular tube cooling plate. A helium gas in a helium gas storage tank passes through helium gas outlets on the helium gas inlet pipes, and enters a centrifuge chamber from a bottom sealing plate. The helium gas is used to replace air in the centrifuge chamber to reduce the wind resistance power and corresponding energy consumption. No vacuuming is required, so sealing requirements are lower. Heat dissipation equipment is placed inside the centrifuge chamber, and a helium gas circulation wind duct is added to improve heat exchange coefficient and heat dissipation effect. A special vibration isolation gasket is used, in such a manner that the vibration transmitted to the top bearing system support device by the main shaft is separated from the centrifuge chamber, thereby avoiding resonance of the centrifuge chamber and the main shaft, and ensuring safety of the centrifuge chamber. The present invention is more economical when operating at an acceleration of below 1500 g, and can maintain the temperature below 45° C.

A device and a method for reducing wind resistance power of a large geotechnical centrifuge are provided. A semicircular tube cylindrical cooling device is installed between an internal side of a high-speed rotor system and a cylindrical shell. A serpentine top semicircular tube cooling plate is provided right above a hanging basket, and return helium gas inlet holes are opened at a center of the top semicircular tube cooling plate. A helium gas in a helium gas storage tank passes through helium gas outlets on the helium gas inlet pipes, and enters a centrifuge chamber from a bottom sealing plate. The helium gas is used to replace air in the centrifuge chamber to reduce the wind resistance power and corresponding energy consumption. No vacuuming is required, so sealing requirements are lower. Heat dissipation equipment is placed inside the centrifuge chamber, and a helium gas circulation wind duct is added to improve heat exchange coefficient and heat dissipation effect. A special vibration isolation gasket is used, in such a manner that the vibration transmitted to the top bearing system support device by the main shaft is separated from the centrifuge chamber, thereby avoiding resonance of the centrifuge chamber and the main shaft, and ensuring safety of the centrifuge chamber. The present invention is more economical when operating at an acceleration of below 1500 g, and can maintain the temperature below 45° C.

A separator includes a housing that is stationary during operation and is a tank having at least two openings. A drum is located inside the housing, has a vertical axis of rotation, and a number of openings to the housing corresponding to the openings of the housing. A single multi-part support and drive device with at least one control device and a motor including of a stator, a stator magnet assembly, and a rotor with a rotor magnet assembly, which keep the drum suspended inside the housing, radially and axially supported, and set in rotation. The stator magnet assembly is located outside the housing and the rotor magnet assembly is located inside the housing on the drum so that an air gap is formed between the housing and the drum while the drum is rotating during operation. The axial support and centering of the drum is implemented by controlling the axial position of the rotor magnet assembly using the control device by actuating the motor.

A valve bridge portion, in which four valves A to D are connected in a bridge shape, is interposed between sample lines to a rotor of a continuous centrifuge. A microcomputer is able to open and close the valves A to D independently and is capable of switching between top feed and bottom feed to the sample line. When sample supply is started, switching between the top feed and the bottom feed is performed multiple times, and in the middle of switching and sending a sample liquid, the microcomputer executes an operation of temporarily increasing a liquid pressure multiple times by temporarily closing an outlet valve (C or D) and then immediately opening the valve. As a result of repeating the operation of switching between the said sample feed directions and temporarily increasing the liquid pressure, air that accumulates inside the rotor can be effectively discharged.

A valve bridge portion, in which four valves A to D are connected in a bridge shape, is interposed between sample lines to a rotor of a continuous centrifuge. A microcomputer is able to open and close the valves A to D independently and is capable of switching between top feed and bottom feed to the sample line. When sample supply is started, switching between the top feed and the bottom feed is performed multiple times, and in the middle of switching and sending a sample liquid, the microcomputer executes an operation of temporarily increasing a liquid pressure multiple times by temporarily closing an outlet valve (C or D) and then immediately opening the valve. As a result of repeating the operation of switching between the said sample feed directions and temporarily increasing the liquid pressure, air that accumulates inside the rotor can be effectively discharged.

A liquid handling device having an axis of rotation about which the device can be rotated to drive liquid flow. The device includes a vented upstream chamber having an outlet port and an unvented chamber including an inlet port to receive liquid from the outlet port of the upstream chamber and an outlet port radially outward the inlet port. The device further includes a vented downstream chamber having an inlet port to receive liquid from the outlet port of the unvented chamber. A downstream conduit connects the outlet port of the unvented chamber to the inlet port of the downstream chamber and includes a bend radially inward of the outlet port of the unvented chamber. An upstream conduit connects the outlet port of the upstream chamber to the inlet port of the unvented chamber.

A liquid handling device having an axis of rotation about which the device can be rotated to drive liquid flow. The device includes a vented upstream chamber having an outlet port and an unvented chamber including an inlet port to receive liquid from the outlet port of the upstream chamber and an outlet port radially outward the inlet port. The device further includes a vented downstream chamber having an inlet port to receive liquid from the outlet port of the unvented chamber. A downstream conduit connects the outlet port of the unvented chamber to the inlet port of the downstream chamber and includes a bend radially inward of the outlet port of the unvented chamber. An upstream conduit connects the outlet port of the upstream chamber to the inlet port of the unvented chamber.

A separator includes a housing that is stationary during operation and designed as a tank having at least two openings. A drum located inside the housing can be rotated about an axis of rotation, the drum having an axis of rotation and at least one opening. A gap is formed at least in sections or continuously between the drum and the housing. The separator also includes a support and drive device having at least two support and/or drive units, which keep the drum suspended inside the housing, supported, and/or set in rotation. One of the support and/or drive units is a first magnetic bearing that at least axially supports the drum and to keep it suspended. At least one other of the support and/or drive units is axially supports the drum.

A separator includes a housing that is stationary during operation and designed as a tank having at least two openings. A drum located inside the housing can be rotated about an axis of rotation, the drum having an axis of rotation and at least one opening. A gap is formed at least in sections or continuously between the drum and the housing. The separator also includes a support and drive device having at least two support and/or drive units, which keep the drum suspended inside the housing, supported, and/or set in rotation. One of the support and/or drive units is a first magnetic bearing that at least axially supports the drum and to keep it suspended. At least one other of the support and/or drive units is axially supports the drum.

Provided is a rotating assembly. The rotating assembly is for forming a microstructure, and comprises: a rotating body rotatable about a rotary shaft; a first support member installed on the rotating body so as to be spaced apart from the rotational shaft and having a predetermined viscous composition disposed on an outer surface thereof; and a fluid communicating portion for communicating the inside and the outside of the rotating body, wherein when the rotating body rotates, the viscous composition is pulled in a radially outward direction of the rotary shaft, and the pulled viscous composition is cured through the fluid communicating portion, thereby forming a microstructure.