39results about How to "Increase peripheral speed" patented technology

In order to improve a flatness of a work in single wafer type double-side polishing in which one wafer is polished with one carrier, a carrier larger in diameter than upper and lower surface plates that rotate is inserted between the surface plates, and a wafer smaller in diameter than the surface plates is held with the carrier. The carrier is rotated by plural eccentric gears that mesh with external gear teeth formed on the outer peripheral surface of the carrier at plural positions along a circumferential direction thereof and revolve around positions spaced from the centers as centers in synchronism with each other or one another at the plural positions of meshing. The carrier rotates about its center and moves circularly around the center of the surface plates spaced from the center thereof. The upper surface plate is reciprocated in a direction perpendicular to the central axis when required. Geometrical motion loci of points on the wafer are complex and peripheral speeds alter to large extents to thereby enhance equalization of peripheral speeds of points on the wafer to a higher level to thereby improve a flatness.

The invention relates to an embedded micro streamline axial flow blood pump, which can be used for assisting blood circulation of failed heart. The blood pump comprises a pump body arranged in a sleeve body and a driving device arranged outside the pump body, wherein the pump body comprises the sleeve body, a front guide vane, a rotor and a back guide vane; the hubs of the front guide vane, a rotor and the back guide vane are designed integrally in an integral streamline form; and the front half part of the rotor is provided with an inductive blade. The blood pump can reduce the on-way pressure loss of the blood in the flow channel of the blood pump, improve efficiency and reduce hemolysis; and can promote the circumferential speed of the blood after entering into a rotor area due to the inductive blade arranged on the front half part of the rotor, and avoids the occurrence of vacuole phenomenon.

Methods for making hydrodynamic bearing devices are provided. The method can effectively increase the peripheral speed when grinding the axial element which is the structural element of the hydrodynamic bearing device, and can prevent centrifugal rotation to improve grinding efficiency and work efficiency, and improve product quality at the same time. An axial member serving as a structural member of a hydrodynamic bearing device is supported at both ends in surface contact using a pair of plate members while rotating the axial member about its axis. The peripheral surface of the axial portion of the axial member is ground on a grinding stone while supporting the peripheral surface of the axial portion with a supporting member. Also, the plate member which is in surface contact with the flange portion of the axial member is formed with at least one recessed portion in a predetermined area of ​​the center of rotation of the contact surface thereof. In addition, the contact portion of the plate member with the flange portion is elastically supported by an elastic member.

The invention relates to a method and a device for melt-blowing, forming and plaiting finite fibres to produce a fibrous nonwoven. Here, the fibre streams which are produced by a melt-blowing die and a hot air flow are blown into a forming gap of a forming element, wherein the fibres are joined together within the forming gap to produce a fibre composite. In order to influence the filling and the forming of the fibres within the forming gap directly below the melt-blowing die, according to the invention the fibres are freely guided substantially vertically from the melt-blowing die as far as the forming gap via an adjustable blowing section, wherein the adjustability of the blowing section lies in the range from 100 mm to 2000 mm. In this way, both very fine fibres and coarse fibres can advantageously be formed to produce a loose fibre composite.

The present invention relates to a method and apparatus for meltblowing, forming and laying up finite fibers into fibrous nonwovens. In this case, the fiber flow generated by the melt blowing nozzle and the hot gas flow is blown into the forming gap of the forming element, wherein the fibers are combined within the forming gap to form a fiber composite. In order to influence the filling and shaping of the fibers inside the forming gap directly below the meltblowing nozzle, according to the invention the fibers are guided freely essentially vertically on an adjustable blowing path from the meltblowing nozzle to the forming gap, wherein The adjustment range of the blowing path is 100mm to 2000mm. This advantageously enables not only very fine fibers but also coarse fibers to be formed into a loose fiber composite.

The invention discloses an air inlet ventilation structure used for an aircraft auxiliary power system. The structure comprises an aircraft auxiliary power system cabin (1) and an air inlet channel (2) which is formed in the aircraft auxiliary power system cabin. An auxiliary power system body (3) is arranged in the aircraft auxiliary power system cabin and communicates with the air inlet channel. A closed type annular guide channel (5) is formed in the inner wall of the aircraft auxiliary power system cabin. A cat ear air inlet (4) is formed in the aircraft auxiliary power system cabin and communicates with the guide channel. Diversion spray nozzles (6) are arranged in the positions, perpendicular to the aircraft auxiliary power system cabin, of the guide channel, are located at the side, close to the auxiliary power system body, of the guide channel, and communicate with the guide channel. According to the air inlet ventilation structure provided by the invention, a single cooling air inlet is changed into a plurality of cooling air inlets based on a prior air inlet ventilation structure, and flowing and heat exchanging in the auxiliary power cabin are optimized.

The invention relates to a sulfur tail gas super-gravity desulfurization device and process thereof. The sulfur tail gas super-gravity desulfurization device comprises an alkali liquid storage tank and a super-gravity machine; the device utilizes alkali liquid to desulfurize sulfur tail gas, and a unique super-gravity machine structure is provided; in the structure, a hollow rotary shaft with a fluid channel is formed in a shell in a manner of penetrating through the middle axis of the shell, and a sleeve with a gas channel function sleeves the hollow rotary shaft; meanwhile, a rotary channel, which is communicated with a filling region and is provided with a spiral channel, is also formed on the basis; fluid passes through the hollow rotary shaft and then self rotation of the fluid is realized through the rotary channel, and then the fluid enters the filling region; the liquid is crushed and torn into small liquid drops under the action of a centrifugal force of liquid and is in sufficient contact with liquid reverse-flow small bubbles, and a phase interface, which is rapidly updated, is provided; crushing and tearing mixing of the fluid and gas is further realized by utilizing the self-rotation under a rotary state; the sufficient degree of gas-liquid contact is improved, and furthermore, the better sulfur tail gas desulfurization effect is obtained.

The invention relates to an integrated blade hydraulic-magnetic transmission wellbore cleaning tool, which is composed of a flow tube shell, a rotating magnetic core, an upper gage body, and a rotating blade. , the outer wall of the flow tube shell is provided with a lower gage body and a limit ring, and the upper gage body is installed on one side of the limit ring; the rotating magnetic core is integrally formed by the drum and the shaft, and the transition section between the drum and the shaft has a drilling Liquid hole, fixed hydraulic conversion device outside the rotating shaft, permanent magnets are evenly distributed on the outer wall of the rotating drum, and the magnetic poles of two adjacent permanent magnets are opposite in direction; the rotating magnetic core is installed in the flow tube shell, and the rotating blade is set outside the flow tube shell There is a bearing raceway on the outer wall of the flow tube shell, which corresponds to the bearing raceway of the rotating blade. Rolling bodies are installed in the bearing raceway, and there are sealing grooves on the outer wall of the flow tube shell; the rotating blade is integrated, and the inner wall of the cylinder is uniformly distributed. The magnetic poles of two adjacent permanent magnets are opposite in direction; the outer wall of the rotating blade is also equipped with an oil storage sealing compensation system. The invention adopts hydraulic-magnetic coupling transmission and is not limited by whether the drill pipe rotates, and can greatly improve the wellbore cleaning efficiency.