31results about How to "Improve axial uniformity" patented technology

A polarization maintaining fibre with high birefringence is composed of fibre core and cladding layer in which there are the triangular stress element arranged symmetrically at both sides of fibre core and the optional stress holes. Its preparing process includes combining core rod with stress rods by OVD technology, spraying the cladding layer, and drawing. Its advantages are simple preparing process, and high axial uniforming, strength and performance.

The invention discloses a variable crucible ratio monocrystal silicon growth method which comprises the following steps of: growing monocrystal silicon in a crucible; and after the monocrystal silicon enters constant-diameter growth, regulating variable crucible ratio to continuously increase so as to carry out variable crucible ratio monocrystal silicon growth. According to the variable crucible ratio monocrystal silicon growth method disclosed by the invention, the liquid level of monocrystal interface growth can be slowly increased, the natural thermal convection of a molten mass can be effectively accelerated, the oxygen content concentration of the molten mass can be kept and the axial oxygen content consistency of monocrystal silicon can be effectively improved; and the variable crucible ratio monocrystal silicon growth method is convenient to operate and suitable for the industrialized production.

The invention discloses a device loaded with a structured catalyst with radial wall flow. According to the invention, a plurality of structural units are loaded in a reaction tube. Each structural unit comprises a reactant stream wall flow guide panel, a structured carrier loaded with a catalyst, and an expansion ring with a thermal expansion and contraction effect. The reactant stream wall flow guide panel is arranged at the top end of the structured carrier loaded with the catalyst. The bottom end of the structured carrier loaded with the catalyst is embedded in the expansion ring with thermal expansion and contraction effect. The reactant stream wall flow guide panel is a solid cylindrical body coaxial with the structured carrier loaded with the catalyst. The expansion ring with thermal expansion and contraction effect is a hollow cylindrical body coaxial with the structured carrier loaded with the catalyst. The cross-sections of two hollow parts are overlapped. The device provided by the invention has the advantages of simple structure, low pressure drop, and uniform fluid distribution. With the device, advantages of the structured catalyst in the aspects of heat transfer and mass transfer can be fully performed. Material stream radial wall flow can be realized. The device can be used in industrialized production for producing propylene from methanol.

The invention discloses a high-stability force generator with compensation, which comprises a shell, a compensation sheet, a positioning ring, a magnetic steel, a magnetic conducting ring, a moving frame, and a magnetizing ring. The shell, the magnetic conducting ring and the magnetic increasing ring are all made of magnetic conducting materials, and together with the magnetic steel, a closed-loop magnetic circuit is established, and the moving frame is a coil wound on the skeleton. When the coil is fed with direct current, the coil generates an electromagnetic force in the magnetic field that is consistent with the axial direction of the product. The force generators of the present invention should be used symmetrically in pairs in a mechanical unit. The invention adopts permanent magnet steel with low temperature coefficient and high magnetic performance to improve the force output capability, and the compensating sheet adopts soft magnetic sheet to compensate the influence of working temperature change on air gap magnetic density. The invention has the advantages of high force output capability, high force stability, convenient processing and manufacturing, etc., and can be used as a force feedback element in inertial instrumentation, servo control, and force or moment measurement.

This invention relates to a self-restructing plasma antenna including a column container, inert gases, a RF excitation antenna, a RF excitation source, a signal coupler, a feeding port and an earth plate characterizing that the column container is filled with inert gases, the source and the antenna are used in exciting and maintaining the plasma, in which, the excitation antenna is set in the inside or outside of the column container, its lead out wire is connected with the RF excitation source, the signal coupler is used to couple the signal to the plasma antenna set out of the container, the lead out wire is connected with the internal conductor of the feeding port and the outer conductor is connected with the earth plate.