Abstract:
A rotary joint having a stationary section (60) having a fluid path (6) in which sealed fluid flows; a sleeve (30) having in it a second connection fluid path (6C) in which the fluid from the fluid path flows, rotatable relative to the stationary section, and made of a nonrusting material; a rotary seal ring (2) having a first connection fluid path (6B) that has an inner peripheral surface fitting on the outer peripheral surface of the sleeve so as to be connectable to the second connection fluid path, having a first seal surface (2A) on one side face of the rotary seal ring (2), and having a second seal surface (2B) on the other side face of the rotary seal ring (2); a first stationary seal ring (10) having a first relative seal surface (10S) in intimate contact with the first seal surface; and a second stationary seal ring (11) having a second relative seal surface (11S) in intimate contact with the second seal surface and enabling the fluid path and the first connection fluid path to be connected to a space between the first stationary seal ring (10) and the second stationary seal ring (11).
Abstract:
An in-mold coating process which comprises using a mold equipped with a gate for injecting a molding material and another gate for injecting a coating material, injecting a molding material into the mold through the former gate, molding the molding material into a product through reaction, and then injecting a coating material into the resulting mold through the latter gate to coat the product with the coating material, characterized by forming a fin having a convex portion in the edge or opening area of the product. This process is freed from the leakage of coating material.
Abstract:
A cryogenic fluid supply/discharge device for supplying/discharging a cryogenic fluid to/from a plurality of internal space channels (25) in the rotor assembly (20) of a superconducting motor (2) comprising a rotary joint shaft (32) and a rotary joint (30) having a casing (38), wherein the casing (38) is provided with fixed connection ports (52, 54) at a plurality of axial positions corresponding, respectively, to rotary communicating holes (66) and rotary ring holes (62), a rotary ring (60) is secured to the outer circumference of the rotary joint shaft (32) at the position of every other rotary interconnection hole (66) in the axial direction, and portions of the rotary joint shaft (32) and the rotary ring (60), and a part of the casing provided with the fixed connection openings (50, 52, 54, 56) to come into contact with a cryogenic fluid are made of FRP exhibiting an excellent thermal insulation as compared with metal. The cryogenic fluid supply/discharge device exhibits an excellent thermal insulation and minimizes leakage of the cryogenic fluid to the outside.