JPH0110463Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a horizontal rotary compressor incorporated in a refrigeration cycle or the like, and particularly to one that supplies lubricating oil using its discharged gas.

[Conventional technology]

Figures 1 and 2 are conventional examples.
- A horizontally placed rotary compressor described in specification No. 122706 is shown, which are a partially sectional side view and a cross sectional view, respectively, in which a compression element 3 integrally connected to an electric element 2 is housed in a closed container 1. has been done. A suction hole (not shown) is formed by the movement of the crankshaft 4 and the rotating piston 5.
The refrigerant gas sucked in is compressed and discharged into the discharge muffler 6 via a discharge valve (not shown).
The discharged gas is further guided through a small-diameter discharge gas pipe 7 into the lower end of a large-diameter oil supply pipe 9 in lubricating oil 8 stored at the bottom of the closed container 1, and is ejected. Due to the ejection action (ejector effect) of this discharged gas, the lubricating oil 8 is sucked into the oil supply pipe 9, and from the upper end of the oil supply pipe 9, the oil is press-fitted onto the outer periphery of the bearing 10, covering the end 11 of the bearing 10 that supports the crankshaft 4. It is guided into the reservoir 12 and lubricates sliding parts such as the crankshaft 4.

In the conventional lubricating oil supply using discharged gas, as mentioned above, the lubricating oil lubricates the sliding parts such as the crankshaft 4 together with the discharged gas, so the discharged gas not only reduces the lubricating effect of the lubricating oil. However, there is a drawback that the refrigerant gas passes through the clearance of the bearing 10 of the crankshaft 4 and is mixed into the refrigerant gas sucked into the compressor, reducing the efficiency of the compressor.

In order to eliminate this drawback, Japanese Utility Model Application Publication No. 174772/1983 discloses that a gas vent hole is provided in the upper part of the oil sump container that covers the end of the bearing.

[The problem that the idea aims to solve]

However, the above-mentioned gas vent holes cause the scattered oil to be discharged from the oil sump container into the closed container along with the discharged gas, reducing the amount of oil in the oil sump container, resulting in insufficient oil supply to each sliding part. It has the disadvantage of becoming.

The present invention aims to eliminate the above-mentioned drawbacks of the conventional ones.

[Means to solve the problem]

The horizontal rotary compressor of this invention guides the discharge gas through a small diameter discharge gas pipe connected to a discharge muffler into the lower end of a large diameter oil supply pipe in lubricating oil stored at the bottom of a closed container. The ejecting action of this discharged gas leads lubricating oil through a large-diameter oil supply pipe from its upper end to an oil sump container attached to the outer periphery of the bearing that supports the crankshaft. A notch is formed by cutting a part of the upper outer periphery of the bearing end, which supplies the oil to the moving parts and attaches the oil sump container, along the axial direction from the terminal surface of the bearing end to the outer surface of the bearing. However, a gap is formed between the oil sump container and the outer periphery of the bearing end for the discharged gas to escape.

〔Example〕

3 and 4 show an embodiment of the present invention, with FIG. 3 being a partially sectional side view and FIG. 4 being a cross sectional view.

A rotary compression unit 3 housed in a sealed container 1 includes a crankshaft 4 driven by an electric motor 2, a rotary piston 5 fitted to this shaft, and a discharge muffler 6.
A small-diameter discharge gas pipe 7 through which gas from the discharge muffler 6 passes is inserted at its end into a large-diameter oil supply pipe 9 in which lubricating oil 8 is stored at the inner bottom of the closed container 1. .

End portion 1 of the bearing 10 that supports the crankshaft 4
An oil sump container 12 is press-fitted onto the outer periphery of the container 1, covering the container 1.

The other end of the large-diameter oil supply pipe 9 into which one end of the discharge gas pipe 7 is inserted is connected to the oil sump container 12 .

A notch 13 is provided on the upper outer periphery of the bearing end 11 of the bearing 10 that supports the crankshaft 4, extending along the axial direction from the end surface of the bearing end 11 to the outer surface of the bearing 10. As a result, a gap 14 is formed between the bearing end 11 of the bearing 10 and the oil sump container 12 press-fitted therein.

In the above embodiment, the lubricating oil 8 stored in the inner bottom of the closed container 1 is transferred to the oil sump container 12 by the discharged gas.
However, the discharged gas escapes into the closed container 1 through the gap 14 formed at the top thereof, so that the original lubricating effect of only the lubricating oil 8 can be obtained on the sliding parts such as the crankshaft 4, and , the discharge gas is bearing 10
There is no reduction in compressor efficiency caused by the refrigerant passing through the clearance and mixing with the suction refrigerant gas.

[Effect of idea]

As described above, according to the horizontal rotary compressor of this invention, in which lubricating oil is supplied by discharged gas through the oil sump container, there is a A notch is formed along the outer periphery of the bearing end to form a gap for the discharged gas to escape between the oil sump container and the outer periphery of the bearing end. In addition, it is possible to obtain the original lubrication effect of only the lubricating oil, and to prevent the discharge gas from mixing with the suction refrigerant through the bearing clearance, which would cause a decrease in the efficiency of the compressor.

In addition, since the discharged gas passing through the above gap is discharged from the end face of the bearing end toward the outer surface of the bearing, the oil contained in the discharged gas is separated by the outer surface of the bearing, and the oil content is re-drained. It can be collected in a sump container.

Moreover, compared to a conventional oil sump container with a gas vent hole, oil is discharged from the oil sump container together with the discharged gas, reducing the amount of oil in the oil sump container and making it impossible to supply oil to each sliding part. Defects that are sufficient are eliminated.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional side view showing a conventional horizontal rotary compressor, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Figs. 3 and 4 are one embodiment of the present invention. give an example,
They are a partially sectional side view and a cross sectional view, respectively. DESCRIPTION OF SYMBOLS 1... Airtight container, 4... Crankshaft, 7... Discharge gas pipe, 8... Lubricating oil, 9... Oil supply pipe, 10...
... bearing, 11 ... bearing end, 12 ... oil sump container,
13...Notch, 14...Gap.

Claims (1)

[Scope of utility model registration request] The discharged gas is guided through a small-diameter discharge gas pipe connected to the discharge muffler into the lower end of the large-diameter oil supply pipe in the lubricating oil stored at the bottom of the closed container, and is ejected. , a horizontal rotary compression system in which lubricating oil is passed through a large-diameter oil supply pipe from its upper end to an oil sump container attached to the outer periphery of the bearing that supports the crankshaft, and supplied to sliding parts such as the crankshaft. In the machine, a part of the upper outer periphery of the bearing end on which the oil sump container is attached is cut out along the axial direction from the terminal end surface of the bearing end to the outer surface of the bearing to form a notch, A horizontal rotary compressor, characterized in that a gap is formed between the oil sump container and the outer periphery of the end of the bearing for discharged gas to escape.