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US 11,536,272 B2Granted
Lubricating oil supply apparatus and compressor using lubricating oil supply apparatus
AssigneeLG Electronics Inc.
InventorsKi Yeon Lee, Seungwook Kim, Young Hwan Kim
Life of this patent
Estimating the term…
Abstract
A lubricating oil supply apparatus having a structure in which a valve is forced in a direction for opening a bypass hole by a centrifugal force, and a spring presses the valve in a direction in which the valve closes the bypass hole. When the above-described structure is applied to an oil pump in which an oil (lubricating oil) supply amount increases in proportion to an operation speed, it is possible to secure a sufficient oil (lubricating oil) supply amount in a low speed operation mode, and prevent oil from being supplied more than necessary in a high speed operation mode.
Claims17
A lubricating oil supply apparatus, comprising:
- a rotational shaft;
- a lubricating oil supply path formed along a longitudinal direction of the rotational shaft;
- a lubricating oil supply portion installed at a lower end of the rotational shaft to supply lubricating oil to the lubricating oil supply path;
- a bypass hole provided at a side surface of the rotational shaft to allow a space outside of the rotational shaft and the lubricating oil supply path to communicate;
- and
- a valve body installed on the rotational shaft to open and close the bypass hole, wherein the valve body comprises:
- a valve that opens and closes the bypass hole;
- and
- a spring that elastically presses the valve in a direction toward a center of the rotational shaft, wherein a degree of opening of the bypass hole is determined based on a degree of opening of the valve, which is subjected to a centrifugal force generated by rotation of the rotational shaft, moving in a direction away from the center of the rotational shaft while overcoming an elastic force of the spring, wherein the lubricating oil supply portion comprises:
- a rotational portion fixed to the rotational shaft to rotate together with the rotational shaft;
- and
- a fixed portion fastened to the rotational portion to be rotatable relative to the rotational portion, wherein the rotational portion is provided with at least one of an outer wall that is in contact with an outer circumferential surface of the rotational shaft or an inner wall that is in contact with an inner circumferential surface of the rotational portion, and wherein the outer wall and the inner wall each are provided with a communicating portion that faces the bypass hole and communicates with the bypass hole.
9 more elements
A compressor comprising a lubricating oil supply apparatus, the lubricating oil supply apparatus comprising:
- a rotational shaft;
- lubricating oil supply path formed along a longitudinal direction of the rotational shaft;
- a lubricating oil supply portion installed at a lower end of the rotational shaft to supply lubricating oil to the lubricating oil supply path;
- a bypass hole provided at a side surface of the rotational shaft to allow a space outside of the rotational shaft and the lubricating oil supply path to communicate;
- and
- a valve body installed on the rotational shaft to open and close the bypass hole, wherein the valve body comprises:
- a valve that opens and closes the bypass hole;
- and
- a spring that elastically presses the valve in a direction toward a center of the rotational shaft, and wherein a degree of opening of the bypass hole is determined based on a degree of opening of the valve, which is subjected to a centrifugal force generated by rotation of the rotational shaft, moving in a direction away from the center of the rotational shaft while overcoming an elastic force of the spring, wherein the lubricating oil supply portion comprises:
- a rotational portion fixed to the rotational shaft to rotate together with the rotational shaft;
- and
- a fixed portion fastened to the rotational portion to be rotatable relative to the rotational portion, wherein the rotational portion is provided with at least one of an outer wall that is in contact with an outer circumferential surface of the rotational shaft or an inner wall that is in contact with an inner circumferential surface of the rotational portion, and wherein the outer wall and the inner wall each are provided with a communicating portion that faces the bypass hole and communicates with the bypass hole.
9 more elements
A lubricating oil supply apparatus, comprising:
- a rotational shaft;
- lubricating oil supply path formed in the rotational shaft;
- a lubricating oil supply portion installed at a lower end of the rotational shaft to supply lubricating oil to the lubricating oil supply path;
- a bypass hole provided at a side surface of the rotational shaft to allow a space outside of the rotational shaft and the lubricating oil supply path to communicate;
- and
- a valve body installed on the rotational shaft to open and close the bypass hole, wherein the valve body comprises:
- a valve that opens and closes the bypass hole;
- and
- a spring that elastically presses the valve in a direction toward a center of the rotational shaft, wherein a degree of opening of the bypass hole is determined based on a degree of opening of the valve, and wherein the degree of opening of the bypass hole increases as a rotational speed of the rotational shaft increases, wherein the lubricating oil supply portion comprises:
- a rotational portion fixed to the rotational shaft to rotate together with the rotational shaft;
- and
- a fixed portion fastened to the rotational portion to be rotatable relative to the rotational portion, wherein the rotational portion is provided with at least one of an outer wall that is in contact with an outer circumferential surface of the rotational shaft or an inner wall that is in contact with an inner circumferential surface of the rotational portion, wherein the outer wall and the inner wall each are provided with a communicating portion that faces the bypass hole and communicates with the bypass hole, and wherein the valve body further comprises a valve housing provided on the outer wall, and wherein the valve and the spring are embedded in a chamber defined by the valve housing.
9 more elements
Dependencies are inferred from the claim text.