JPH033991A - Scroll compressor oil supply system - Google Patents

Abstract

PURPOSE:To prevent the seizure of an eccentric bearing and extend the life of a scroll compressor by providing the first axial oil feed passage feeding oil to the eccentric bearing and the second axial oil feed passage feeding oil to the first and the second bearings and connected to a radial oil feed passage. CONSTITUTION:The first axial oil feed passage 15 feeding oil to an eccentric bearing 3 inclined into a V-shape to the axial direction is provided in a crank shaft 4 so that one end is located in a lubricant 11 at the bottom of a sealed container 10 in the crank shaft 4 and the other end is opened to a space 12 formed at the upper end of the crank section 5 of the crank shaft 4. The second axial oil feed passage 16 communicated to a radial oil feed passage 14 feeding the lubricant 11 to the first bearing 6 and the second bearing 7 is provided. The oil feeding to the eccentric bearing 3 is sufficiently secured by the first axial oil feed passage 15, and the seizure of the eccentric bearing 3 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a scroll compressor for refrigerators such as air conditioners and refrigerators.

Prior Art A fixed scroll 1, an orbiting scroll 2 combined therewith, a crank portion 5 of a crankshaft 4 connected to the orbiting scroll 2 via an eccentric bearing 3, a first bearing 6 and a second bearing 3. A scroll compressor including a shaft portion 8 of a crankshaft 4 supported by a bearing 7, a motor 9 connected to the crankshaft 4, and an airtight container 10 housing these components in an airtight space. An axial oil supply path is provided in the crankshaft 4, one end of which is located in the lubricating oil ll at the bottom of the closed container 10, and the other end opens into a space 12 formed at the upper end of the crank portion 5 of the crankshaft 4. 13, and the radial oil supply passage 14 for supplying lubricating oil 11 to the first bearing 6 or the second bearing 7 was connected to the axial oil supply passage 13.

Invention tries to solve! ! ! ! However, in the conventional configuration, oil is supplied from the bottom of the closed container through the crankshaft to the upper mechanical part by an axial oil supply path, but lubricant is supplied to the radial oil supply path which supplies lubricating oil to the first or second bearing. Since the upper eccentric bearing is also lubricated, there is a problem that the amount of oil supplied to the upper eccentric bearing is insufficient, resulting in seizing of the eccentric bearing.

Means for Solving the Problems In order to solve the above problems, one end of the crankshaft is located in the lubricating oil at the bottom of the sealed container, and the other end opens into the space formed at the upper end of the crank part of the crankshaft. a first axial oil supply passage for supplying oil to an eccentric bearing inclined in a V-shape with respect to the axial direction in the crankshaft;
Alternatively, a second axial oil supply passage communicating with a radial oil supply passage for supplying lubricating oil to the second bearing is provided.

Effects With the above configuration, the present invention can ensure sufficient oil supply to the eccentric bearing through the oil supply path in the first axial direction, thereby preventing seizure of the eccentric bearing.

EXAMPLE Hereinafter, an oil supply system for a scroll compressor according to an example of the present invention will be described with reference to the drawings.

In FIG. 1, a fixed scroll 1, an orbiting scroll 2 combined therewith, a crank portion 5 of a crankshaft 4 connected to the orbiting scroll 2 via an eccentric bearing 3, a first bearing 6 and a second A scroll compressor including a shaft portion 8 of a crankshaft 4 supported by a bearing 7, a motor 9 connected to the crankshaft 4, and an airtight container 10 housing these components in an airtight space. A shaft is inserted into the crankshaft 4 in the axial direction so that one end thereof is located in the lubricating oil 11 at the bottom of the closed container 10, and the other end opens into the space 12 formed at the upper end of the crank portion 8 of the crankshaft 4. A first axial oil supply passage 15 that supplies oil to the eccentric bearing inclined in a V-shape, and a second shaft that communicates with a radial oil supply passage 14 that supplies lubricating oil 11 to the first bearing 6 and the second bearing 7. This is a configuration in which an oil supply path 16 is provided in the direction.

With the above configuration, sufficient oil supply to the eccentric bearing 3 is ensured by the oil supply path 15 in the first axial direction, and seizing of the eccentric bearing 3 can be prevented.

Effects of the Invention As described above, the present invention provides a crankshaft in which one end is located in the lubricating oil at the bottom of a closed container, and the other end opens a space formed at the upper end of the crank portion of the crankshaft. a first axial oil supply path that supplies oil to the eccentric bearing inclined in a V-shape with respect to the axial direction; and a second shaft that communicates with a radial oil supply path that supplies lubricating oil to the first or second bearing. By providing an oil supply path in the first axial direction, sufficient oil supply to the eccentric bearing is ensured through the oil supply path in the first axial direction, preventing seizing of the eccentric bearing and extending the life of the scroll compressor. play.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a scroll compressor according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a conventional scroll compressor. DESCRIPTION OF SYMBOLS 1... Fixed scroll, 2... Orbiting scroll, 3... Eccentric bearing, 4... Crankshaft, 5... Crank part, 6...
...First bearing, 7...Second bearing, 8...
...Shaft part, 9...Motor, 10...
... airtight container, 11 ... lubricating oil, 12 ...
... Space, 13 ... Axial oil supply path, 14
...Radial oil supply path, 15... Oil supply path in the first axial direction, 16... Oil supply path in the second axial direction.

Claims (1)

[Claims] a fixed scroll, an orbiting scroll combined therewith, a crank portion of a crankshaft connected to the orbiting scroll via an eccentric bearing, and a shaft portion of the crankshaft supported by first and second bearings. , comprising a motor connected to the crankshaft and an airtight container housing these components in an airtight space,
In the crankshaft, one end is located in the lubricating oil at the bottom of the closed container, and the other end is opened in the space formed at the upper end of the crank portion of the crankshaft in the axial direction. an oil supply path in the first axial direction that supplies oil to the eccentric bearing inclined in a V-shape;
and an oil supply device for a scroll compressor, comprising: a second axial oil supply passage connected to a radial oil supply passage for supplying lubricating oil to a second bearing;