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US 11,242,846 B2Granted
Lubricating oil supply apparatus and compressor using lubricating oil supply apparatus
AssigneeLG Electronics Inc.
InventorsYoung Hwan Kim, Wonseok Kang, Jinkook Kim
Life of this patent
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Abstract
A lubricating oil supply apparatus may include a rotational portion that rotates together with a rotational shaft and a fixed portion that maintains a fixed location thereof and supplies oil through a space that circles with respect to a rotational center of the rotational portion, thereby supplying oil regardless of a rotational direction of the rotational shaft.
Claims9
A lubricating oil supply apparatus for a bidirectionally rotating compressor, the lubricating oil supply apparatus installed at a first end of a rotational shaft provided with a lubricating oil supply path formed along a longitudinal direction of the rotational shaft to supply lubricating oil to the lubricating oil supply path, wherein the lubricating oil supply apparatus comprises:
- a fixed portion provided with an oil inlet, an accommodation space that communicates with the oil inlet, and an oil chamber that communicates with the oil inlet through the accommodation space without directly communicating with the oil inlet;
- and
- a rotational portion accommodated in the accommodation space of the fixed portion and coupled to the rotational shaft to rotate together with the rotational shaft, wherein the rotational portion comprises:
- a space provided at a location spaced apart from a rotational center of the rotational portion in a radial direction and encircling the rotational center of the rotational portion as the rotational portion rotates;
- and
- an oil outlet provided at the rotational center of the rotational portion to be connected to the oil chamber and the lubricating oil supply path, and wherein the oil inlet and the oil chamber are each provided at a location facing a turning locus of the space so that, as the rotational portion rotates, oil introduced into the space through the oil inlet moves together in a state of being stored in the space, and the oil is supplied from the space to the oil chamber when the space faces the oil chamber, and the oil in the oil chamber is supplied to the lubricating oil supply path through the oil outlet, wherein the rotational portion further comprises:
- a first rotational portion provided with a shaft coupling portion that passes through the fixed portion to be fastened to the rotational shaft, and a first tooth portion connected to the shaft coupling portion, accommodated in the accommodation space of the fixed portion, and formed radially outward with respect to a center of the shaft coupling portion;
- and
- a second rotational portion provided with a second tooth portion formed inward while surrounding the first tooth portion, the second rotational portion being accommodated in the accommodation space, wherein the first tooth portion and the second tooth portion are partially engaged with each other, wherein a space between the first tooth portion and the second tooth portion defines the space, wherein the first rotational portion and the second rotational portion rotate at a constant speed while maintaining a location at which the first tooth portion and the second tooth portion are engaged with each other, wherein a rotational center of the first rotational portion and a rotational center of the second rotational portion are coincident to each other, wherein a center of the second tooth portion is located eccentrically from the rotational center, wherein a tooth profile of the first tooth portion and a tooth profile of the second tooth portion are coincident to each other to be engaged with each other, wherein a radius of a dedendum circle of the first tooth portion is less than a radius of an addendum circle of the second tooth portion, and wherein a radius of an addendum circle of the first tooth portion is greater than a radius of an addendum circle of the second tooth portion and is less than a radius of a dedendum circle of the second tooth portion.
6 more elements
A compressor, comprising:
- a rotational shaft provided with a lubricating oil supply path formed along a longitudinal direction of the rotational shaft;
- a frame provided with a rotational support to support rotation of the rotational shaft;
- a motor provided on the rotational shaft and the frame to rotate the rotational shaft in a first direction and a second direction opposite to the first direction with respect to the frame;
- a housing in which lubricating oil is stored at a lower portion thereof and the frame is accommodated at an upper portion of a lubricating oil storage space;
- and
- a lubricating oil supply apparatus installed at a first end of the rotational shaft, wherein at least a portion of the lubricating oil supply apparatus is submerged in the lubricating oil storage space to supply the lubricating oil to the lubricating oil supply path, wherein the lubricating oil supply apparatus comprises:
- a fixed portion provided with an oil inlet, an accommodation space that communicates with the oil inlet, and an oil chamber that communicates with the oil inlet through the accommodation space without directly communicating with the oil inlet;
- and
- a rotational portion accommodated in the accommodation space of the fixed portion and coupled to the rotational shaft to rotate together with the rotational shaft, wherein the rotational portion comprises:
- a space provided at a location spaced apart from a rotational center of the rotational portion in a radial direction and encircling the rotational center of the rotational portion as the rotational portion rotates;
- and
- an oil outlet provided at the rotational center of the rotational portion to be connected to the oil chamber and the lubricating oil supply path, and wherein the oil inlet and the oil chamber each are provided at a location that faces a turning locus of the space so that, as the rotational portion rotates, oil introduced into the space through the oil inlet moves together in a state of being stored in the space, and the oil is supplied from the space to the oil chamber when the space faces the oil chamber, and the oil in the oil chamber is supplied to the lubricating oil supply path through the oil outlet, wherein the rotational portion further comprises:
- a first rotational portion provided with a shaft coupling portion that passes through the fixed portion to be fastened to the rotational shaft, and a first tooth portion connected to the shaft coupling portion, accommodated in the accommodation space of the fixed portion, and formed radially outward with respect to a center of the shaft coupling portion;
- and
- a second rotational portion provided with a second tooth portion formed inward while surrounding the first tooth portion, the second rotational portion being accommodated in the accommodation space, wherein the first tooth portion and the second tooth portion are partially engaged with each other, wherein a space between the first tooth portion and the second tooth portion defines the space, wherein the first rotational portion and the second rotational portion rotate at a constant speed while maintaining a location at which the first tooth portion and the second tooth portion are engaged with each other, wherein a rotational center of the first rotational portion and a rotational center of the second rotational portion are coincident to each other, wherein a center of the second tooth portion is located eccentrically from the rotational center, wherein a tooth profile of the first tooth portion and a tooth profile of the second tooth portion are coincident to each other to be engaged with each other, wherein a radius of a dedendum circle of the first tooth portion is less than a radius of an addendum circle of the second tooth portion, and wherein a radius of an addendum circle of the first tooth portion is greater than a radius of an addendum circle of the second tooth portion and is less than a radius of a dedendum circle of the second tooth portion.
12 more elements
Dependencies are inferred from the claim text.