2results about How to "Small leakage" patented technology

The application discloses a sealing assembly and a gas turbine, which comprises a front baffle, a high-pressure finger ring, a low-pressure finger ring and a rear baffle connected in sequence from a high-pressure side to a low-pressure side, wherein the low-pressure finger ring is provided with an axial shoe arranged along an inner ring circumference of the low-pressure finger ring, the axial shoe extends in a direction away from the high-pressure finger ring on the low-pressure finger ring shaft, the axial shoe has a sealing surface facing a central axis of the low-pressure finger ring, and the sealing surface is provided with an abradable seal coating. The sealing assembly of the application, wherein the axial shoe on the low-pressure finger ring and the abradable seal coating on the sealing surface thereof can form self-adaptive contact with a rotor surface, thus ensuring the sealing effect and avoiding scratching the rotor; meanwhile, the finger seal structure can realize high-efficiency sealing in a small axial space, thereby shortening the length of the gas turbine rotor, improving the rotor vibration problem, and significantly improving the sealing reliability and the overall operation efficiency of the gas turbine.

This grain-oriented electrical steel sheet includes a base steel sheet having a predetermined chemical composition, a glass coating formed on the base steel sheet, and a tension-applied insulation coating formed on the glass coating, on a front surface of the base steel sheet, a plurality of linear strains that extend continuously or intermittently in a direction intersecting with a rolling direction are present, intervals p in the rolling direction of the plurality of linear strains adjacent to each other are 3.0 to 9.0 mm, widths of the linear strains are 10 to 250 pm, and, in an X-ray topographic spectrum in a range of 1.50 mm in the rolling direction that is obtained from an X-ray topographic image of the front surface and includes the linear strain at a center, a full width at half maximum of a peak of the X-ray topographic spectrum including a maximum value of a spectral intensity is 0.02 mm or more and 0.10 mm or less.