Eagle Industry Co., Ltd.

Eagleburgmann Japan Co., Ltd.

Yoji Oshii

Atsushi Kaneko

Tetsuya Sato

Koji Akiyama

Yoshiaki Takigahira

Joji Watanabe

A pumping ringproducing an axial flow of sealed flow is secured to a rotary shaftat an axial position different from a rotary ringso that the sealed fluid positioned in the sealed spaceflows along the axial direction of the rotary shaft. A discharge holeis formed on an inner circumferential surface of a seal coverpositioned in the downstream side of the axial flow of the sealed fluid resulting from a rotation of the pumping ring. An inflow holeis formed in the upstream side of the axial flow of the sealed fluid resulting from the rotation of the pumping ring, so that the sealed fluid discharged from the discharge holereturns to the inside of the sealed space from the inflow hole. On the inner circumferential surface of the seal coverprovided with the discharge hole, a baffle memberis provided so that it protrudes radially inward in order to block the flow of the sealed fluid along the rotating direction of a retainerand orient the sealed fluid toward the discharge hole

Shaft seal apparatus

A mechanical seal device for obtaining appropriate sliding properties under any conditions, such as a pressure of seal is low or high. Both first groovesand second groovesare formed on a sliding faceof a stationary ring. The first grooves which are not in communication externally and act for reducing contact resistance of a sliding face by a dynamic pressure action when a rotary shaft rotates, the second grooves act for reducing the contact resistance of the sliding face constantly by introducing a pressure from external. Thus, a mechanical seal device which is available to seal sealed fluid under an appropriate dry contact status wherein a sliding face load is reduced in any condition can be provided.

Tandem seal device

Growing community of inventors

Tokyo, Japan

Yoji Oshii