JPS6111512Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hermetic compressor, and in particular relates to the improvement of the winding section oil supply mechanism thereof. The aim is to

The structure of a conventional reciprocating hermetic compressor is shown in Figure 1a,
The structure is as shown in FIG. 1B, and 1 is a motor stator, 2 is a motor rotor, 3 is a frame, and 4 is a crankshaft, which is a vertical compression mechanism with a compression section A at the top and a rotating section B at the bottom.

Lubricating oil 5 in the compressor configured in this way
In order to supply oil to the upper part of the stator 1, the oil flowing from the lubricating oil inlet 6 is subjected to centrifugal force due to the rotation of the main shaft, the pressure increases and it moves up in the oil groove 7, and the oil supplied to each sliding part is Also, oil scattered from the short shaft 8 of the crankshaft falls onto the rotor 2 through the window 9 of the frame 3, and is supplied to the windings by rotation of the main shaft.

However, in the past, as shown in FIGS. 2a and 2b, a cylindrical rotor end ring 11 is provided on the radially outer side of the rotor core 10, which has the drawback of increasing flow resistance and reducing oil supply capacity. Ta.

The present invention has been made in view of the above-mentioned conventional drawbacks, and eliminates the above-mentioned conventional drawbacks by forming an inclined surface on the inside of the rotor end ring in the hermetic compressor constructed as described above. .

Hereinafter, FIGS. 3a and 3b, 4a and 4b, and 5a and 5b, which show embodiments of the present invention, will be explained. In these drawings, 4 is a crankshaft, 10 is a rotor core, and 11 is a rotor end ring provided on the radially outer side of the rotor core 10, and has an inclined surface 12 formed inside thereof. 13 is a rotor fan, and 14 is a bearing.

Incidentally, the inclined surface 12 may have a slanted shape with an arcuate cross section as shown in FIGS. 3a and b, or a linearly inclined cross section as shown in FIGS. As shown in Figures 5a and 5b, it is formed in a concave and slanted shape with an arcuate cross section.

In the hermetic compressor of the present invention configured as described above, the lubricating oil flowing from the lubricating oil inlet 6 of the shaft 4 is subjected to centrifugal force due to the rotation of the shaft 4, and the pressure increases, and the oil groove of the shaft 4 increases. 7, the oil supplied to each sliding part and the oil splashed from the crankshaft short shaft 8 collect on the upper surface of the frame 3, and flow from the frame window 9 to the frame bearing part 14.
and the rotor end ring 11, and the fallen oil is affected by centrifugal force due to the rotation of the shaft 4 (since the rotor 2 is fixed to the shaft 4 by press-fitting etc., it rotates in the same way as the shaft 4). The winding portion is supplied with oil through the inclined surface between the rotor fan 13 inside the receiving rotor end ring 11.

As mentioned above, the hermetic compressor of the present invention has an inclined surface between the rotor fan inside the cylindrical rotor end ring provided on the side of the rotor core. Lubricating oil is supplied along the inclined surface without being disturbed, thereby improving the lubricating oil supply ability without increasing flow path resistance, actively supplying oil to the windings and promoting the cooling effect of the windings. can be done.

[Brief explanation of the drawing]

FIGS. 1a and 1b are a vertical sectional view and a top sectional view of a conventional reciprocating compressor, respectively, FIGS. 2a and 2b are an enlarged sectional view and an enlarged partial sectional perspective view of the main part of a conventional compressor rotating part, Figures 3a and 3b are an enlarged cross-sectional view and an enlarged partial cross-sectional perspective view of the main parts of the rotating part of the compressor of the present invention;
Figures a and b and Figures 5a and b are an enlarged cross-sectional view and an enlarged partial cross-sectional perspective view of the main part of another embodiment. In addition, 10 is a rotor core, 11 is a rotor end ring, 12 is an inclined surface, and 13 is a rotor fan.

Claims (1)

[Scope of utility model registration request] In a hermetic compressor in which a rotor end ring having a rotor flange is provided on the radially outer side of the rotor core side part, and the winding part is cooled by lubricating the winding part from the rotor end ring, the inside of the rotor end ring is A hermetic compressor characterized in that an inclined surface is formed between the rotor fan for supplying oil from the rotor end ring to the winding part.