JPS6069290A - Lubricating oil supplying structure for enclosed type compressor - Google Patents

Abstract

PURPOSE:To prevent mixing of refrigerating machine oil and gas as well as outflow of oil into cycle by a method wherein the location of the lower surface of a lower bearing is made lower than the lower surface of a rotating shaft and a cover body, forming a muffler in the lower bearing, is inserted into the lower bearing forcibly. CONSTITUTION:Refrigerant gas is sucked from a suction pipe 9 by the rotation of a rotor 5 and is compressed, thereafter, is discharged from a valve 10 into the internal space of a discharging cover body 11. Thereafter, the refrigerant gas passes through a hole 12 is discharged into the internal space of the case 1, then, ascends through a gap between a stator 13 and the rotor 5 and is discharged into the cycle through a discharging pipe 14. According to this method, the refrigerating machine oil will never be mixed with the refrigerant gas, therefore, the run-off of the oil into the cycle may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improving the reliability of a hermetic compressor.

A conventional hermetic compressor will be explained with reference to FIG.

The electric part 2 is shrink-fitted to the upper part of the case 1, the pump part (pump part) is welded to the lower part, and the W moving part 2 and the pump f! It is connected to Il 3 by a rotating shaft 4. Due to the rotation of the rotor 5 constituting the electric part 2, the rotor 27 is fitted into the eccentric part 6 of the rotating shaft 4, and the next rotor 27 rotates inside the cylinder chamber 8, and the refrigerant gas flows into the suction pipe 9.
The roller 7 rotates inside the cylinder chamber 8, and the refrigerant gas is sucked in through the suction pipe 9, compressed, and then discharged from the pulp 10 into the internal space of the cover 11. case 1 through hole 12 passing through
is discharged into the internal space of. After that, the gap between the stator 13 and the rotor 5 that constitute the electric part Z is raised, and the discharge pipe 14 discharges the discharge to the recycling. The cover 11 and the lower bearing 15 constituting the pump section 3 are screwed together, so there is a 0.0 mm gap between them.
What distance occurs in 1 m?

The refrigerant gas forms bubbles on the bottom surface of the cover 11, and the refrigerant gas enters through the gap between the rotary shaft 4 and the lubricant 17 attached to the tip of the rotary shaft 4, which obstructs the lubricating movement of the pump part. In order to prevent the occurrence of scratches, lower bearing 15
A passage 16 is provided between the cover 11 and the cover 11, and by removing gas from the passage 16, refrigerant gas is allowed to leak to the lower surface of the cover 11. According to this hermetic compressor, passage 1
As gas escapes from 6, it mixes with the refrigerating machine oil stored at the bottom of case 1, and the refrigerating machine oil rises in case 1 together with the refrigerant gas, and is discharged into the cycle, causing the oil level at the bottom of case 1 to rise. This prevents oil supply to the sliding surface of the pump member, so it is lower than the lower surface, and a cover that forms a silencing chamber in the lower bearing is press-fitted into the lower bearing and locked.

The rate U will be explained below using a one-shot example shown in Figure 2. Components with the same reference numerals as those in the conventional example indicate the same components.

At the top of case 1! A pump member is disposed at the lower part of the moving part E, and the electric part E and the pump member are connected by a rotating shaft 4. As the rotor 5 rotates, refrigerant gas is sucked through the suction pipe 9, compressed, and then discharged from the pulp 10 into the internal space of the cover 11. After that, it passes through the hole 12 and the case 1
Even if refrigerant gas leaks, it will never reach the lower surface of the rotating shaft 4 because the upper ring 15 bridges the gap between the stator 13 and the rotor 5. In addition, since there is no need for a gas vent passage between the lower bearing 15 and the cover 11, the refrigerant gas and the refrigerating machine oil stored at the bottom of the case 1 are extremely likely to mix. The lo discharged into the cycle is drastically reduced\ By providing a gas venting passage, it is possible to prevent refrigerant gas from accumulating on the bottom surface of the cover 11, and therefore, the refrigerant gas is discharged from the gas venting passage. Machine oil and gas mix and the oil is carried out to the cycle, causing the oil level at the bottom of case 1 to drop, resulting in insufficient lubrication to the sliding surfaces of the pump section. .

[Brief explanation of drawings]

Rotating shaft, 5... Rotor, 6... Eccentric part, 7... Roller, 8... Schilling chamber, 9... Suction pipe, 10...
・Valve, 11...Process body, 12...Hole, 13...
Stator, 14...Discharge pipe, 15...Lower bearing, 16...Passage, 17...Oil supply device. 'j! 3+ figure

Claims (1)

[Claims] In a hermetic compressor that has an electric part on the top of a cylindrical case and a pump part on the bottom, the lower surface of the lower bearing is lower than the lower surface of the rotating shaft, and a cover that forms a sound-deadening chamber is placed on the lower bearing. A lubricating oil supply structure for a hermetic compressor characterized by press-fitting and locking.