Tokyo Roki Co., Ltd.

Kosaku Ishida

Yoshitaka Watanabe

Takatsugu Kurosawa

Kazuo Tanaka

Yoshitaka Nakamura

Tsuyoshi Yao

Kazuki Shirakura

Takayuki Hoshi

Yuta Endo

Jun Takashima

Kazutaka Hara

Kazuaki Murai

Masaya Wada

An oil separator that separates mist oil from processing-target gas containing mist liquid includes a plurality of separation disks. The plurality of separation disks rotate around an axis, and are stacked and spaced in an axial direction. The separation disk includes an inner peripheral part and an outer peripheral part. The inner peripheral part forms a surface of a frustum of a hypothetical cone or pyramid coaxial with the separation disk, and is inclined with respect to a radial direction toward one side in an axial direction. The outer peripheral part forms a surface of a frustum of a hypothetical cone or pyramid coaxial with the separation disk, and continuously extends outward from an outer peripheral edge of the inner peripheral part. The outer peripheral part is inclined with respect to the radial direction toward another side in the axial direction.

Separation disk and oil separator

An oil separator separating mist oil from processing-target gas includes: a case, a first partition wall and a lower, second partition wall, both partitioning vertically an internal space of the case; a partition dividing a space between the first and second partition walls into an introduction path and a first chamber; a supply hole vertically penetrating the second partition wall from the introduction path to a separation chamber; a communication hole vertically penetrating the second partition wall from the first chamber to the separation chamber; a rotor in the separation chamber; a center-side space in a center part of the rotor, the center-side space communicating with the supply hole through an open, upper part of the center-side space. The rotor separates the mist oil from the processing-target gas flowing from the center-side space to an outer periphery of the rotor, where the separated oil is emitted. The processing-target gas flows into the first chamber through the communication hole.

Oil separator

In an oil separator that separates mist oil contained in target gas from the gas, the present disclosure is aimed to easily mount the oil separator to various targets and to increase its versatility. An oil separator according to the present disclosure includes: a nozzle that injects oil from an injection hole to rotate a spindle around an axis; a housing having a gas communicating portion and an oil communicating portion on its bottom; and a joint member that is removably mounted to the housing, and that includes a gas introducing portion and an oil discharge portion, the gas introducing portion introducing blow-by gas and transferring the gas to the gas communicating portion, the oil discharge portion receiving oil from the oil communicating portion and discharging the oil to outside.

An oil mist filter includes: a filter body having a tubular shape, the filter body causing processing-target gas supplied to a hollow in the filter body pass through an outer peripheral surface to capture oil mist contained in the processing-target gas; and an end plate disposed at one end surface of the filter body the end plate projecting outward beyond an outer peripheral edge of the one end surface of the filter body. A plurality of ventholes are formed at a portion of the end plate projecting beyond the outer peripheral edge of the one end surface of the filter body. The processing-target gas blown out from the outer peripheral surface of the filter body passes through the ventholes.

Oil mist filter and oil separator

An oil separator configured to separate from gas mist oil contained in target gas of the present invention is aimed to enhance separation efficiency of oil mist contained in target gas while reducing the weight of the separation disks. The oil separator of the present invention includes a rotor. This rotor has a plurality of separation disks() layered along the axis line of the spindle. Each of the separation disksare configured with truncated cone shape plate members and have formed concavo-convex ribsextending from the rotational center in the radiation direction on the outer peripheral side partscorresponding to the inclined surfaces of the truncated cone. The concavo-convex ribsinclude first convex portionsand second convex portionswhere the first convex portionsinclude on the outer peripheral side partsa convex on the front surface side and a concave on the back surface side, and the second convex portionsinclude on the outer peripheral side partsa convex on the back surface side and a concave on the front surface side.

A lower partition wall having a through hole vertically penetrates the lower partition wall center. A spindle is inserted into the through hole. The top surface side of the lower partition wall includes a convex portion, a groove, and a drain hole. The convex portion is concentrically disposed at the through hole periphery. The groove extends, from an outer peripheral side of the convex portion, toward the through hole on an inner peripheral side. The drain hole is outside the convex portion, vertically penetrating the lower partition wall. The separated oil circles a top surface of the lower partition wall. The oil flowing to an inner peripheral side of the lower partition wall is guided to the groove and flows into the through hole. The oil flowing to an outer peripheral side of the lower partition wall flows into the drain hole.

An oil separator includes a cylindrical housing that accommodates a rotor and is provided with a gas discharge portion (first exhaust portion), the oil separator being configured to introduce target gas from a rotation center side of the rotor to condense oil mist and emit condensed oil from an outer peripheral edge of the rotor and further being configured to discharge from the housing through the gas discharge portion the blow-by gas (target gas) after having the oil mist separated. The oil separator includes a dome portion (sectioning member) that covers from an outside of the housing the gas discharge portion and sections a closed space around the gas discharge portion and an outlet pipe (second exhaust portion) that is provided to the dome portion and that discharges the blow-by gas from the closed space that is sectioned by the dome portion.

A rotor separates oil mist from a target gas. This rotor includes a separation disk group having separation disks including a plurality of truncated cone shape plate members layered. The separation disk group includes a first space (hollow part with attachment opening) and a second space (gaps between separation disks), the first space formed on a rotation center side of the rotor and the second space formed between separation disks that are laid over and in communication with the first space. The first space contains an oil introducing portion (gap between the upper end of the spindle and the upper side sealing member). Target gas is introduced into the first space, target gas and oil introduced from the oil introducing portion are made to flow from the first space to the second space to be discharged outward from an outer peripheral edge of the separation disk group, while rotating the rotor.

Oil mist separation method and oil separator

An oil separator includes a plurality of separation discs rotatable together with a spindle and layered in an axis direction of the spindle, a nozzle that protrudes from a lower circumferential face of the spindle and configured to rotate the spindle by injection of an oil, a lower case has a gas inflow part into which blow-by gas flows, an oil discharge part into which an oil after separation is discharged, an upper case that sections together with the lower case a housing chamber in which spindle, separation discs and nozzle are housed, and a sectioning member that sections the housing chamber into a primary separation chamber, configured to primarily separate the oil mist, and a secondary separation chamber that secondarily separates the oil mist included in the gas after primary separation, and forms between the nozzle and the separation discs a communication opening that guides the gas being treated.

[Problem to be Solved] To enhance the performance for separation of oil mist from blow-by gas. [Solution] A filter elementwhich is to be attached to an oil separator unitincludes a core. This core is a double tube having an internal cylindrical memberand an external cylindrical member, and a space between the internal cylindrical member and the external cylindrical member is used as a separation chamber. An injection holefor injecting blow-by gas while increasing its flow velocity is provided in the internal cylindrical member. A surface which is an inner wall surface of the external cylindrical member and which faces the injection hole is a spraying surface onto which the blow-by gas injected from the injection hole is sprayed. Moreover, an opening for oil discharge from which oil OL condensed on the spraying surface is discharged, and an opening for discharge from which the blow-by gas from which oil mist has been separated is discharged are provided in the core.

Oil mist separator

The present invention aims to provide a muffling structure of a vent pipe and a muffling structure of a case, which is capable of muffling in a wide frequency range and preventing vent resistance in the air pipe or the case from deterioration. Vent holes () are formed in the peripheral wall of the vent pipe (), a cover () is so provided on the peripheral wall of the vent pipe () as to cover the vent holes (!), and a bag-like body () in which activated charcoal () is contained is disposed in the space formed by the peripheral wall of the vent pipe () and the inner wall of the cover ().

Muffling structure of vent pipe and muffling structure of case

There is provided an air cleaner in which air does not take along evaporated fuel adsorbed by an adsorbent of a canister. In an air cleaner ( ), within a casing ( ) comprised of a primary side case ( ) having an inlet ( ) at one side and a secondary side case ( ) having an outlet ( ) at the other side and in between the cases ( ) and ( ), there is provided a filter element ( ) in a vertical state with a filter medium ( ) folded in a zigzag that prevents dust flowing into an engine. The inlet ( ) and the outlet ( ) are both arranged above a center line of the casing ( ). Within the secondary side case ( ) of the casing ( ), at only the secondary side bottom of the filter element ( ), there is provided a canister ( ) comprising an adsorbent such as a granular activated carbon, a honeycomb activated carbon, an activated carbon fiber, or an activated carbon mixed paper, which adsorbs evaporated fuel, across approximately an entire width of the casing ( ) in a width direction, and in only an upper flow side half of an air flow direction.

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Yokohama, Japan

Kosaku Ishida