# US 2019/0316501 A1 · Stack of separation disks

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- Number: US 2019/0316501 A1
- Document ID: US20190316501A1
- Status: Published application
- Kind: A1
- Application number: 16/303,389
- Filed: 2016-05-23
- Published: 2019-10-17
- Earliest claimed: 2016-05-23
- Assignees: Tokyo Roki Co., Ltd.
- Applicants: Tokyo Roki Co., Ltd.
- Inventors: Yoshitaka Watanabe
- Web page: https://patentgrep.com/patent/US20190316501A1

## CPC

- F01M 13/04: having means for purifying air before leaving crankcase, e.g. removing oil
- B04B 7/14: for separating walls of conical shape
- B04B 5/005: {Centrifugal separators or filters for fluid circulation systems, e.g. for lubricant oil circulation systems}
- B04B 5/12: Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
- B04B 2005/125: {the rotors comprising separating walls}
- F01M 2013/0422: {Separating oil and gas with a centrifuge device}
- F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- B04B: CENTRIFUGES (high-speed drum mills B02C19/11; domestic spin driers D06F; analysing, measuring or monitoring physical or chemical properties of samples during centrifuging, see the relevant subclasses for these procedures, e.g. G01N)

## Abstract

A stack of separation disks, which includes a spindle and a rotor, and separates mist oil from processing-target gas by rotating the rotor and introducing oil for separation and the processing-target gas; the stack constituting the rotor, and the stack including: a first separation disk that is constituted by a plate member having a circular truncated cone shape, and has a rib formed on an inclined surface of the circular truncated cone shape, the rib extending in a first direction inclined toward one direction in a rotation direction with respect to a radial direction from a center of rotation; and a second separation disk that is constituted by a plate member having the circular truncated cone shape, and has a rib formed on an inclined surface of the circular truncated cone shape, the rib extending in a second direction inclined toward another direction opposite the one direction.

## Claims

### Claim 1

A stack of separation disks used in an oil separator, the oil separator including a spindle and a rotor having an inner peripheral space and rotable together with the spindle, the oil separator configured to separate mist oil from processing-target gas by rotating the rotor and introducing, into the inner peripheral space, oil for separation and the processing-target gas containing the mist oil;
the stack of separation disks constituting the rotor by being stacked in one axial direction of the spindle, and the stack of separation disks comprising:
a first separation disk constituted by a plate member having a circular truncated cone shape, the first separation disk having a rib formed on an inclined surface of the circular truncated cone shape, the rib of the first separation disk extending in a first direction inclined toward one direction in a rotation direction with respect to a radial direction from a center of rotation; and
a second separation disk constituted by a plate member having the circular truncated cone shape, the second separation disk having a rib formed on an inclined surface of the circular truncated cone shape, the rib of the second separation disk extending in a second direction inclined toward another direction opposite the one direction in the rotation direction with respect to the radial direction from the center of rotation;
wherein the first separation disk and the second separation disk are stacked alternately in the one axial direction of the spindle, the first separation disk and the second separation disk which are vertically stacked and adjacent to each other have the ribs arranged to cross each other in at least one position.

### Claim 2 (depends on 1)

The stack of separation disks according to claim 1, wherein the rib forms a convex shape on a top surface of the outer peripheral part and forms a concave shape on a back surface of the outer peripheral part, and
wherein the rib is arranged in a straight or curved manner, extending outwardly with respect to the center of rotation.

### Claim 3 (depends on 1)

The stack of separation disks according to claim 1, further comprising an inner peripheral part which is inclined and provided on a side close to the center of rotation, with respect to the radial direction, toward another axial direction of the spindle,
wherein the outer peripheral part is inclined, with respect to a radial direction, toward the one axial direction of the spindle, and
wherein a corner portion is formed between the inner peripheral part and the outer peripheral part.

### Claim 4 (depends on 3)

The stack of separation disks according to claim 3, wherein the corner portion interposed between the inner peripheral part and the outer peripheral part has one of a right angle and an obtuse angle.

### Claim 5 (depends on 3)

The stack of separation disks according to claim 3, wherein an inclined angle of the inner peripheral part with respect to the radial direction is equal to or less than 45 degrees.

### Claim 6 (depends on 3)

The stack of separation disks according to claim 3, wherein an inclined angle of the outer peripheral part with respect to the radial direction is equal to or less than 45 degrees.

### Claim 7 (depends on 3)

The stack of separation disks according to claim 3, wherein the corner portion interposed between the inner peripheral part and the outer peripheral part is rounded.