04-02-2021 дата публикации
Номер: US20210033391A1
The present invention provides a surface following nozzle, an observation device for a moving object surface, and an observation method for the moving object surface that can remove water in the vicinity of the nozzle while following changes in the shape and changes in the distance of a moving object. A surface following nozzle includes a nozzle that injects gas from a tip end thereof, a separating part that closes a base end of the nozzle, and an extending and contracting part that is provided at a rear side of the nozzle via the separating part, and extends and contracts along an axial direction of the nozzle. The extending and contracting part includes an elastic body that applies a forward force with respect to the nozzle. 113-. (canceled)14. A surface following nozzle , comprising:a nozzle that injects gas from a tip end thereof;a separating part that closes a base end of the nozzle; andan extending and contracting part that is provided at a rear side of the nozzle via the separating part, and extends and contracts along an axial direction of the nozzle, wherein,the extending and contracting part includes an elastic body that applies a forward force with respect to the nozzle,{'sub': r', 'max', 'min', 'N', 'max', 'W, 'sup': 2', '3, 'when a spring constant of the elastic body is set as k [N/m], a necessary followed distance changing amount is set as x[m], a maximum pressure of gas that can be supplied is set as P[Pa], a minimum pressure of allowable gas is set as P[Pa], a nozzle discharge area is set as S[m], a maximum velocity of cooling water in a vicinity of the nozzle tip end is set as V, and a density of the cooling water is set as ρ[kg/m], the spring constant k of the elastic body satisfies following formulas (1) and (2), and'}{'sub': min', 'max, 'claim-text': [{'br': None, 'i': k', 'P', '−P', 'S', '/x, 'sub': max', 'min', 'N', 'r, '<()\u2003\u2003(1)'}, {'br': None, 'i': P', 'V, 'sub': min', 'W', 'max, 'sup': '2', '=ρ/2\u2003\u2003(2)'}, {'br': None, 'i': ...
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