OIL-DRAIN DEVICE FOR THRUST BEARING DEVICE AND TURBOCHARGER PROVIDED WITH THE SAME
First Claim
1. An oil-drain device for a thrust bearing, comprising:
- a rotor shaft;
a collar member to be mounted to an outer periphery of the rotor shaft so as to be rotatable with the rotor shaft, the collar member having a collar body portion having a cylindrical shape and a flange portion formed to have a larger diameter than the collar body portion;
a thrust bearing having an insertion hole into which the rotor shaft is inserted, the thrust bearing being configured to make slide contact with a first end surface of the flange portion of the collar member to support the rotor shaft which rotates in a state of being inserted into the insertion hole in an axial direction;
an oil-supply channel for supplying lubricant oil to a sliding portion of the thrust bearing which makes slide contact with the first end surface of the flange portion; and
an oil-drain space forming member disposed on a side of a first end surface of the thrust bearing, the oil-drain space forming member defining an oil-drain space through which the lubricant oil leaking from the sliding portion of the thrust bearing flows, between the thrust bearing and the oil-drain space forming member,wherein the oil-drain space includes;
an oil-drain channel defined between the first end surface of the thrust bearing and a first end surface of the oil-drain space forming member, the oil-drain channel surrounding the flange portion of the collar member; and
an oil-drain port formed below the oil-drain channel, for discharging the lubricant oil flowing through the oil-drain channel outside the oil-drain space, andwherein the oil-drain space is configured to guide the lubricant oil flowing through the oil-drain channel to outside the oil-drain space via the oil-drain port, along a flow direction of the lubricant oil flowing through the oil-drain channel from an upstream side toward a downstream side in a rotational direction of the rotor shaft .
2 Assignments
0 Petitions
Accused Products
Abstract
An oil-drain device for a thrust bearing includes: a rotor shaft; a collar member mounted to an outer periphery of the rotor shaft; a thrust bearing supporting the rotor shaft in an axial direction; and an oil-drain space forming member defining an oil-drain space through which lubricant oil leaking from a sliding portion of the thrust bearing flows, between the thrust bearing and the oil-drain space forming member. The oil-drain space includes: an oil-drain channel defined between a first end surface of the thrust bearing and a first end surface of the oil-drain space forming member, surrounding the flange portion of the collar member; and an oil-drain port formed below the oil-drain channel, for discharging the lubricant oil flowing through the oil-drain channel outside the oil-drain space. The oil-drain space is configured to guide the lubricant oil flowing through the oil-drain channel to outside the oil-drain space via the oil-drain port, along a flow direction of the lubricant oil flowing through the oil-drain channel from an upstream side toward a downstream side in a rotational direction of the rotor shaft.
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Citations
15 Claims
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1. An oil-drain device for a thrust bearing, comprising:
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a rotor shaft; a collar member to be mounted to an outer periphery of the rotor shaft so as to be rotatable with the rotor shaft, the collar member having a collar body portion having a cylindrical shape and a flange portion formed to have a larger diameter than the collar body portion; a thrust bearing having an insertion hole into which the rotor shaft is inserted, the thrust bearing being configured to make slide contact with a first end surface of the flange portion of the collar member to support the rotor shaft which rotates in a state of being inserted into the insertion hole in an axial direction; an oil-supply channel for supplying lubricant oil to a sliding portion of the thrust bearing which makes slide contact with the first end surface of the flange portion; and an oil-drain space forming member disposed on a side of a first end surface of the thrust bearing, the oil-drain space forming member defining an oil-drain space through which the lubricant oil leaking from the sliding portion of the thrust bearing flows, between the thrust bearing and the oil-drain space forming member, wherein the oil-drain space includes; an oil-drain channel defined between the first end surface of the thrust bearing and a first end surface of the oil-drain space forming member, the oil-drain channel surrounding the flange portion of the collar member; and an oil-drain port formed below the oil-drain channel, for discharging the lubricant oil flowing through the oil-drain channel outside the oil-drain space, and wherein the oil-drain space is configured to guide the lubricant oil flowing through the oil-drain channel to outside the oil-drain space via the oil-drain port, along a flow direction of the lubricant oil flowing through the oil-drain channel from an upstream side toward a downstream side in a rotational direction of the rotor shaft . - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification