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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/116880
Kind Code:
A mechanical seal device according to an embodiment of the present invention is equipped with a sealing ring (13) attached to a protruding part (11a) protruding from a housing (11), a mating ring (23) attached to the end of a rotating shaft (21), and a welded bellows (15) inserted onto the protruding part (11a) and positioned between the housing (11) and the sealing ring (13). By pushing the sealing ring (13) with the welded bellows (15) in the axial direction to bring the sealing ring (13) into contact with the mating ring (23), it is possible to ensure a high pressing force, in particular an even pressing force across the entire circumference, while keeping the axial-direction and radial-direction sizes of the device small, and it is possible to achieve excellent liquid-tightness. In addition, the welded bellows (15) also functions as a seal member for stopping liquid that has leaked across an O-ring (14), and can achieve even more reliable liquid-tightness. As a result, it is possible to provide an outside-type mechanical seal device which can ensure excellent liquid-tightness in response to high rotational speed and high fluid pressure while keeping the size of the device small.

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AOKI, Kengo (1 Nishinokyo-Kuwabara-cho, Nakagyo-ku, Kyoto-sh, Kyoto 11, 〒6048511, JP)
HONDA, Hiroki (1 Nishinokyo-Kuwabara-cho, Nakagyo-ku, Kyoto-sh, Kyoto 11, 〒6048511, JP)
TAKAHASHI, Hidekazu (1-12-15, Shiba-Daimon, Minato-k, Tokyo 87, 〒1058587, JP)
Application Number:
Publication Date:
June 28, 2018
Filing Date:
December 11, 2017
Export Citation:
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SHIMADZU CORPORATION (1 Nishinokyo-Kuwabara-cho, Nakagyo-ku Kyoto-sh, Kyoto 11, 〒6048511, JP)
EAGLE INDUSTRY CO., LTD. (1-12-15, Shiba-Daimon Minato-k, Tokyo 87, 〒1058587, JP)
International Classes:
F16J15/34; F16J3/04; F16J15/36; F16L27/08
Foreign References:
Attorney, Agent or Firm:
KYOTO INTERNATIONAL PATENT LAW OFFICE (Hougen-Sizyokarasuma Building, 37 Motoakuozi-tyo, Higasinotouin Sizyo-sagaru, Simogyo-ku, Kyoto-s, Kyoto 91, 〒6008091, JP)
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