| 摘要 |
PROBLEM TO BE SOLVED: To provide a shaft seal structure for an axial flow pump, capable of preventing dry sliding of shaft seal devices at both ends of a shaft to which an impeller rotated in both normal and reverse directions and capable of inverting a transport direction of liquid to be transported is fixed. SOLUTION: The axial flow pump 1 is provided with the impeller 9 rotated in both normal and reverse directions and capable of inverting the transport direction of the liquid to be transported; the shaft 11 in which the impeller 9 is fixed to the middle and of which both ends are protruded out of a casing 3; and the shaft seal devices 15A, 15B for sealing the protruded portions of the shaft 11. A shaft seal device mounting pipe 13A in the inner side of the shaft seal device 15A is connected with a section 7B of the casing 3 in the opposite side to the shaft seal device 15A sandwiching the impeller 9, by means of a connecting pipe 19A, and a shaft seal device mounting pipe 13B in the inner side of the shaft seal device 15B is connected with a section 7A of the casing 3 in the opposite side to the shaft seal device 15B sandwiching the impeller 9, by means of a connecting pipe 19B. COPYRIGHT: (C)2006,JPO&NCIPI
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