Lubricant supply device and a compressor using the same

Patent metadata

Field	Value
Publication number	US-11022116-B2
Application number	US-201916252299-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Jan 19, 2018
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

Disclosed is a trochoid lubricant supply device that is configured to connect to a rotational shaft. A connector of the lubricant supply device is configured to reduce an oil leakage amount of lubricant, and is configured to insert to a lower portion of a rotational shaft. The connector includes: a rotator mounting member inserted into and fixed to the rotator of the lubricant supply device; a penetrating member that penetrates a fixer of the lubricant supply device; an enlarged diameter extending radially outwards from the penetrating member outside the fixer; and a rotational shaft mounting member extending axially in the diameter enlarged member and is fastened to the rotational shaft. Further, the lubricant supply device of the present disclosure can supply the oil regardless of a rotation direction of the rotational shaft by supplying the oil by a space pivoting about the rotational center of the rotator.

First claim

What is claimed is:

1. A lubricant supply device that is configured to be installed at an end of a rotational shaft and that is configured to supply lubricant to a lubricant supply flow path defined along a longitudinal direction of the rotational shaft, the lubricant supply device comprising:
a fixer that defines an oil inlet, an accommodation space that communicates with the oil inlet, and an oil chamber that is spaced apart from the oil inlet, and that communicates with the oil inlet via the accommodation space, the fixer comprising a fixer cover that defines a through-hole at a center of the fixer cover and that covers an upper portion of the accommodation space of the fixer; and
a rotator that is accommodated in the accommodation space of the fixer, that is coupled to the rotational shaft, and that is configured to rotate together with the rotational shaft, the rotator defining a rotator space that is positioned radially outward of a rotational center of the rotator and that faces the oil inlet and the oil chamber;
wherein the rotator comprises:
an inner diameter coupler located at the rotational center of the rotator, and
a connector that connects the inner diameter coupler to the rotational shaft and that defines an oil outlet connected to the oil chamber and the lubricant supply flow path, the connector comprising:
a rotator mounting member that is inserted into and fixed to the inner diameter coupler,
a penetrating member that extends axially from the rotator mounting member and that penetrates the through-hole of the fixer cover,
a diameter extension member that extends radially outward from the penetrating member and that is located at an upper portion of the fixer cover, and
a rotational shaft mounting member that extends axially from the diameter extension member and that is fastened to the rotational shaft, and

wherein the rotator is configured to, based on rotating relative to the fixer, (i) cause oil in the rotator space received through the oil inlet to be supplied to the oil chamber and (ii) cause oil in the oil chamber to be supplied to the lubricant supply flow path through the oil outlet.

2. The lubricant supply device of claim 1 , wherein a cross-sectional area of the inner diameter coupler defined inside an outer circumferential surface of the inner diameter coupler is disposed within in a cross-sectional area of the penetrating member defined inside an outer circumferential surface of the penetrating member.

3. The lubricant supply device of claim 1 , wherein an inner diameter of the inner diameter coupler is less than or equal to an outer diameter of the penetrating member.

4. The lubricant supply device of claim 1 , wherein an outer diameter of the penetrating member is less than an outer diameter of the rotational shaft mounting member.

5. The lubricant supply device of claim 1 , wherein the rotational shaft mounting member defines a shaft coupling space configured to receive the end of the rotational shaft at an inside of the rotational shaft mounting member.

6. The lubricant supply device of claim 5 , wherein the rotational shaft mounting member has an inner circumferential surface comprising an inner contact portion that contacts a shaft contact surface defined at an outer circumferential surface of the end of the rotational shaft.

7. The lubricant supply device of claim 1 , wherein the rotational shaft mounting member has an outer circumferential surface comprising an outer contact portion that contacts a coupler contact surface defined at an inner circumferential surface of the inner diameter coupler.

8. The lubricant supply device of claim 1 , wherein the fixer further comprises a fixer body that defines the oil inlet, the accommodation space that accommodates the rotator, and the oil chamber, and
wherein the fixer cover covers the accommodation space in a state in which the rotator is accommodated in the accommodation space.

9. The lubricant supply device of claim 1 , wherein the rotator further comprises:
a first rotator having a center region that defines the inner diameter coupler, the first rotator comprising a first tooth that is disposed at an outer circumference of the first rotator; and
a second rotator accommodated in the accommodation space of the fixer, the second rotator comprising a second tooth that is disposed at an inner circumference of the second rotator, that surrounds the first tooth, and that is configured to engage with the first tooth, and
wherein at least a portion of the first tooth is spaced apart from the second tooth to define the rotator space between the first tooth and the second tooth.

10. The lubricant supply device of claim 9 , wherein a first rotational center of the first rotator is disposed at a second rotational center of the second rotator, and
wherein a tooth center of the second tooth is disposed eccentrically from the first rotational center of the first rotator.

11. The lubricant supply device of claim 10 , wherein the first tooth and the second tooth have tooth profiles that correspond to each other and that are configured to engage with each other,
wherein the first tooth comprises a first plurality of teeth, and the second tooth comprises a second plurality of teeth, and
wherein a number of the second plurality of teeth is greater than a number of the first plurality of teeth.

12. The lubricant supply device of claim 11 , wherein the first tooth defines a first groove radius based on a plurality of grooves of the first plurality of teeth, and a first protrusion radius based on a plurality of protrusions of the first plurality of teeth,
wherein the second tooth defines a second groove radius based on a plurality of grooves of the second plurality of teeth, and a second protrusion radius based on a plurality of protrusions of the second plurality of teeth,
wherein the first groove radius is smaller than the second protrusion radius, and
wherein the first protrusion radius is larger than the second protrusion radius and smaller than the second groove radius.

13. The lubricant supply device of claim 12 , wherein a distance between the tooth center of the second tooth and the first rotational center of the first rotator is less than or equal to a difference between the second groove radius and the first protrusion radius.

14. A compressor, comprising:
a rotational shaft that defines a lubricant supply flow path along a longitudinal direction of the rotational shaft;
a frame comprising a rotation supporter configured to support rotation of the rotational shaft;
a motor that is located at the rotational shaft and the frame and that is configured to rotate the rotational shaft in a first direction and in a second direction with respect to the frame, the second direction being opposite to the first direction;
a housing comprising a lower portion configured to store lubricant and an upper portion that accommodates the frame; and
a lubricant supply device that is installed at an end of the rotational shaft and that is configured to supply the lubricant stored in the lower portion of the housing to the lubricant supply flow path, at least a portion of the lubricant supply device being disposed in the lubricant stored in the lower portion of the housing,
wherein the lubricant supply device comprises:
a fixer that defines an oil inlet, an accommodation space that communicates with the oil inlet, and an oil chamber that is spaced apart from the oil inlet and that communicates with the oil inlet via the accommodation space, the fixer comprising a fixer cover that defines a through-hole at a center of the fixer cover and that covers an upper porti

Assignees

• Lg Electronics Inc

Inventors

• Kim Young Hwan
• Kim Seungwook

Classifications

• F04C15/0088 Primary

  Lubrication (of machines or engines in general F01M) · CPC title

• F04C2/10

  of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member · CPC title

• F04C2210/14

  Lubricant · CPC title

• F04B39/16

  Filtration; Moisture separation · CPC title

• F16N13/20

  Rotary pumps (with distributing equipment F16N13/22) · CPC title