摘要:
A vibration isolator of a wind turbine system installed between a wind tower and a concrete foundation includes a plurality of bearing units arranged along the periphery of a flange of the wind tower, each bearing unit having elastic material layers and rigid material layers stacked alternately.
摘要:
Disclosed is a refrigerator having a noise reduction structure. According to the refrigerator, a branch pipe for reducing the intensive noise occurring from an impeller part is provided to a discharge pipe connected so that the refrigerant is discharged in a direction of a condenser from the impeller part. Therefore, the traveling sound wave of the noise traveling along the discharge pipe and the reverse sound wave traveling toward the branch pipe provided to the outer periphery of the discharge pipe meet each other, so that the both sound waves are cancelled to reduce the noise.
摘要:
A piston head of a hydraulic injection molding machine is screwed with a tie rod inside a hydraulic cylinder of the hydraulic injection molding machine. The piston head has a second screw formed in an inner circumference of a hollow of the piston head and engaged with a first screw formed in an outer circumference of the tie rod. An insert groove having a predetermined shape is formed in the inner circumference of the piston head in front of the second screw.
摘要:
A piston head of a hydraulic injection molding machine is screwed with a tie rod inside a hydraulic cylinder of the hydraulic injection molding machine. The piston head has a second screw formed in an inner circumference of a hollow of the piston head and engaged with a first screw formed in an outer circumference of the tie rod. An insert groove having a predetermined shape is formed in the inner circumference of the piston head in front of the second screw.
摘要:
A method of applying spin to a coated optical fiber to be rotated on its longitudinal axis so that the optical fiber has an ultra-low PMD (Polarization Mode Dispersion) includes the steps of: guiding the coated optical fiber so as not to be deviated from a certain range off a drawing axis at a lower end of an optical fiber coating point; giving torque to the optical fiber by contacting the coated optical fiber with a driving roller which vibrates on the center of an axis substantially parallel to a drawing direction at a lower end of the guiding point; and adjusting an amplitude (A) of the driving roller and a distance (l) between the guiding point and the vibrating point so as to control an angle (θ) between the vibrating optical and the drawing axis. This makes it possible to control a spin rate (spins/m) of the optical fiber generated by rotation.
摘要:
A vibration isolator of a wind turbine system installed between a wind tower and a concrete foundation includes a plurality of bearing units arranged along the periphery of a flange of the wind tower, each bearing unit having elastic material layers and rigid material layers stacked alternately.
摘要:
Disclosed is a refrigerator having a noise reduction structure. According to the refrigerator, a branch pipe for reducing the intensive noise occurring from an impeller part is provided to a discharge pipe connected so that the refrigerant is discharged in a direction of a condenser from the impeller part. Therefore, the traveling sound wave of the noise traveling along the discharge pipe and the reverse sound wave traveling toward the branch pipe provided to the outer periphery of the discharge pipe meet each other, so that the both sound waves are cancelled to reduce the noise.
摘要:
A method for monitoring a spin imparted on an optical fiber in order to reduce Polarization Mode Dispersion (PMD) includes the steps of imparting a spin on a high-temperature optical fiber which is drawn from a preform, photographing a dispersion pattern peculiar to the spun optical fiber with a camera from scattered light naturally generated by the spin imparted on the optical fiber, and displaying the photographed dispersion pattern. The method enables monitoring of rate and period of the spin imparted on the optical fiber on the basis of the displayed dispersion pattern.
摘要:
A furnace for drawing an optical fiber includes a body having an upper and lower openings for supplying a preform and discharging a drawn optical fiber, a heating unit installed in the body for receiving and melting the preform, an atmosphere blocking tube installed to the lower opening for discharging the drawn optical fiber and blocking the optical fiber from the atmosphere, an upper introduction port formed at an upper portion of the body for introducing an inert gas toward the preform and partially discharged outside through a gap between the preform and the upper opening, a central and lower introduction ports formed at central and lower portions for introducing an inert gas into the body, a first flow guiding means for guiding the inert gas introduced through the central introduction port upward and then flowed down along a surface of the preform, and a second flow guiding means for guiding the inert gas introduced through the lower introduction port upward and then discharged outside through the atmosphere blocking tube along a surface of the drawn optical fiber.
摘要:
A furnace for drawing an optical fiber includes a body having an upper and lower openings for supplying a preform and discharging a drawn optical fiber, a heating unit installed in the body for receiving and melting the preform, an atmosphere blocking tube installed to the lower opening for discharging the drawn optical fiber and blocking the optical fiber from the atmosphere, an upper introduction port formed at an upper portion of the body for introducing an inert gas toward the preform and partially discharged outside through a gap between the preform and the upper opening, a central and lower introduction ports formed at central and lower portions for introducing an inert gas into the body, a first flow guiding means for guiding the inert gas introduced through the central introduction port upward and then flowed down along a surface of the preform, and a second flow guiding means for guiding the inert gas introduced through the lower introduction port upward and then discharged outside through the atmosphere blocking tube along a surface of the drawn optical fiber.