Nok Corporation

Advics Co., Ltd.

Eagle Industry Co., Ltd.

National Institute of Advanced Industrial Science

National Institute of Advanced Industrial Science and Technology

Tomonari Saito

Shinya Nakaoka

Kuniaki Miyake

Takeshi Watanabe

Eiji Mizutani

Tomoo Ogura

Taisuke Yamada

Fujio Mizukami

Junichi Nakayama

Makoto Toba

Shuichi Niwa

Kazuhiko Haba

Hiroyuki Nikamoto

Masahiko Inoue

Naotsugu Itoh

Yasushi Sasaki

Takemi Nanba

Hiroshi Shoji

Hirosi Shoji

A sealing device that is capable of suppressing the generation of unusual noise by guiding a gas flow and suppressing the generation of unusual noise caused by resonance between the gas flow and a pipe. An intake noise reduction portion () includes a flow-guiding net portion () for guiding a gas flowing in an intake pipe, an annular frame body portion () for supporting the flow-guiding net portion (), a cylindrical portion () that extends from the frame body portion () in a direction in which the pipe extends, and is fitted into an inner circumferential surface of a second pipe () and a flange portion () that extends from an end portion of the cylindrical portion () toward an outer circumferential surface side, and is disposed in a space between an end surface of a first pipe () and an end surface of the second pipe (). A gasket portion () is provided on both surfaces of the flange portion ().

Sealing device

An outer gas type or inner gas type accumulator has a mechanism for reducing a pressure difference generated when liquid in a liquid chamber and gas expand thermally at a zero-down time, the pressure difference between the inside and outside of a bellows is reduced to suppress abnormal deformation of the bellows, a movable plate supported by a spring is provided at the bellows cap side of an oil port, the movable plate is supported by the spring and away from a seal in normal operation, the movable plate is pushed by the bellows cap and contacts with the seal while elastically deforming the spring, in a zero-down state, and when the liquid and the gas expand thermally in the zero-down state, the bellows cap moves to a position where the liquid pressure and the gas pressure balance, while the movable plate keeps contact with the seal.

Accumulator

To restrain abnormal deformation of a bellows due to a pressure difference between the inside and outside thereof, an outside gas type accumulator includes a pressure difference regulation mechanism () having a movable plate () supported by a coil spring () on the oil port () side of a bellows cap (), the plate () moves together with the cap () in a state of being supported by the spring (), during normal operation, the plate () moves together with the cap () to be brought into contact with a seal () at zero-down time, and the plate () keeps contact with the seal () and the cap () moves to a position where liquid pressure and gas pressure balances while compressing the spring () when the liquid and the charged gas expand thermally.

To prevent abnormal deformation of a bellows, an accumulator has a regulation mechanism for reducing a pressure difference generated when liquid sealed in a liquid chamber and charged gas are thermally expanded at a zero-down time, a seal plate is arranged in an inner peripheral side of a bellows floating end, an elastically deformable thin plate is bonded to the seal plate, an outer peripheral portion of the thin plate is bonded to the bellows floating end, the seal plate is away from a seal at a time of a steady operation, the seal plate contacts with the seal at a zero-down time, and the thin plate is elastically deformed to make liquid pressure balance with gas pressure while the seal plate being kept in contact with the seal when the liquid and gas are thermally expanded.

A method for carrying out a reaction of one substance capable of being activated by a catalyst with another substance capable of reacting with said one substance activated, characterized in that the substance capable of being activated is activated by passing the substance through a diaphragm type catalyst and the reaction is thus performed in one reaction step; a method for producing an aromatic alcohol utilizing the above method; and a reaction apparatus suitable for these reactions. In the method, one substance is activated by passing through a diaphragm type catalyst and an objective reaction is carried out by using the activated substance, and the reaction can be performed in one reaction step and with safety. Moreover, the contact of the above activated substance with a compound to be reacted therewith can be freely controlled, and therefore, over-reaction can be prevented and an objective product can be produced in high yield. The method is thus markedly advantageous from an economical view point as a commercial process for producing oxygen-containing organic compounds such as an aromatic alcohol, a ketone, an aldehyde, a carboxylic acid and an epoxide.

Reaction method utilizing diaphram type catalyst and apparatus therefor

Growing community of inventors

Fujisawa, Japan

Tomonari Saito