JPS6243076B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigerant compressor used in a refrigeration device such as a refrigerator or an air conditioner, and in particular, when the crankshaft is placed in a substantially horizontal direction, the refrigerant compressor can be smoothly refueled. It is related to the technology used.

Conventionally, horizontal compressors such as those mentioned above range from mechanical types that use gear pumps and splash rings, to bubble pumps that use the flow rate of compressed gas, and oil supply devices that use pressure differences. However, each has its own merits and demerits, and there are almost none that are inexpensive and provide a stable amount of refueling.

In view of this, the present invention has been developed by suspending an oil pipe with bent arms below the oil surface from a bearing above the oil surface, installing a coil spring inside this oil pipe that rotates together with the crankshaft, and using the inner wall of the oil pipe as a coil spring. It uses reeds to transfer oil,
The aim is to increase the amount of oil supplied by taking into consideration the arrangement of oil grooves provided on the crankshaft.

An embodiment of the present invention will be described below with reference to the drawings.

1 is the refrigerant compressor main body, and inside the sealed case 2,
An electric motor section 3 and a rotary compression mechanism section 4 are integrated and housed. 3a is a stator of the electric motor, which is press-fitted into the sealed case 2 and fixed thereto.
3b is a rotor. Reference numeral 5 designates a crankshaft 6 press-fitted into the rotor 3b, which has an eccentric portion 6a, a main shaft portion 6b, and a shaft portion 6c, and a main bearing 5 that pivotally supports the main shaft portion 6b.
This is a side plate that integrally has a. This side plate 5 is lightly press-fitted into the sealed case 2 and then fixed by welding or the like. 7 is a cylinder plate that accommodates a rotary piston 8 provided on the eccentric portion 6a of the crankshaft 6. Reference numeral 9 denotes a side plate that integrally includes a bearing 9a that pivotally supports the shaft portion 6c of the crankshaft 6. The aforementioned side plate 5, cylinder plate 7, and side plate 9 are integrated with bolts 10 to define a compression chamber 11. 1
2 is a vane that divides the compression chamber 11 into a high pressure side and a low pressure side, and 12a is a vane spring. Reference numeral 13 denotes a spring guide that is fastened to the bearing 9a with a bolt 10, and a mounting base 13 that fits into the bearing 9a.
a, and an oil pipe 13b whose arm is bent downward. The upper end of the oil pipe 13b is connected to an opening 13c provided coaxially with the crankshaft 6 of the mounting base 13a,
The lower end is the oil 14 stored below the sealed case 2.
It is immersed in. A coil spring 15 is screwed into and fixed to a threaded portion 6d formed at the end of the crankshaft 6, and extends into the oil pipe 13b from an opening 13c, with a slightly conical portion 15a formed at the tip.

Moreover, 15b is a filter press-fitted and fixed to the tip of the oil pipe 13b. 16 is the mounting base 13a
This is a hydraulic chamber defined by the bearing 9a and the end face of the crankshaft 6. 6e, 6f, and 6g are a bearing oil groove, an eccentric oil groove, and a main shaft oil groove provided on the outer periphery of the bearing 6c, eccentric portion 6a, and main shaft portion 6b of the crankshaft 6, respectively. As is clear from FIG. 3, the eccentric oil groove 6f is formed to extend in the axial direction at the minimum eccentric part 6a' of the eccentric part 6a.
The shaft oil groove 6e and the main shaft oil groove 6g extend in a spiral shape, and their terminal ends and starting ends are connected to the eccentric oil groove 6f.

In this configuration, when the electric motor section 3 is energized and the rotor 3b rotates, the crankshaft 6 rotates, and the refrigerant gas sucked into the compression chamber 11 from the suction pipe 18 is compressed by the rotation of the rotary piston 8.
It passes through a discharge valve (not shown) and is once discharged into the sealed case 2, and then is sent to the refrigeration cycle through the discharge pipe 17.

On the other hand, the rotation of the crankshaft 6 simultaneously rotates the coil spring 15 within the oil pipe 13b. This rotation causes the coil spring 15 and the oil pipe 13 to
The oil 14 rises along the inner wall of the coil spring 15 due to the lead of the coil spring 15 and reaches the hydraulic chamber 16. The oil in the hydraulic chamber 16 moves through the spiral shaft oil groove 6e due to viscosity and reaches the eccentric oil groove 6f. The oil that has flowed into the eccentric oil groove 6f then flows into the main shaft oil groove 6g. At this time, since the eccentric part oil groove 6f is provided at the smallest eccentric part 6a' of the eccentric part 6a, when the oil flows from the shaft part oil groove 6e to the eccentric part oil groove 6g, the movement dimension in the normal direction is small, and Main shaft oil groove 6
g, the movement of oil that goes against the centrifugal force is also small over the shortest distance, and flows smoothly to the main shaft oil groove 6g.

Moreover, even if gas flows into each oil groove 6e, 6f, 6g while the compressor is stopped, each oil groove 6e,
Since 6f and 6g are in communication, gas and oil can be easily discharged.

In the embodiment, a rotary type compressor is shown, but the invention is not limited to this, and the present invention can also be applied to a reciprocating type or a screw type compressor. In addition, if the tip of the oil pipe is arranged so that it can be used both vertically and horizontally, the range of use will be further expanded.

As described above, the present invention includes a compression mechanism section and an electric motor section integrated into a container, and a crankshaft driven by the rotor of the electric motor section, wherein the mounting base and one end are connected to the mounting base. The opening is concentric with a bearing that pivotally supports the crankshaft, and the spring guide has an oil pipe connected to an opening provided in the base and having a bent arm whose other end extends into oil stored in the container. A coil spring is provided in the oil pipe, one end of which is fixed to the end of the crankshaft, and the tip of which is immersed in the oil. a shaft portion provided with an eccentric oil groove extending in the direction and facing the bearing and the main bearing;
A shaft oil groove and a main shaft oil groove are connected to the eccentric oil groove on the outer periphery of the main shaft, respectively,
It has the following effects.

B. It has fewer parts and can be manufactured at low cost.

(b) A sufficient amount of oil can be secured to transfer oil using the coil spring lead, so there is no need to worry about seizure or wear.

C. Because the coil spring is constantly immersed in oil when rotating, there is almost no wear on the oil guide, and quiet operation is possible.

2) The mass of the coil spring is small, and the contact pressure with the oil guide is also small, so there is no increase in electric motor input.

(e) The oil groove provided on the crankshaft is particularly designed with an eccentric oil groove located at the smallest eccentric part of the eccentric part, and a shaft oil groove and a main shaft oil groove connected to this oil groove. The oil inside is less affected by centrifugal force, and the amount of oil supplied can be increased.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a refrigerant compressor showing one embodiment of the present invention, FIG. 2 is a sectional view taken along the line -' in FIG. 1, and FIG. 3 is a perspective view of the crankshaft. 4... Compression mechanism section, 3... Electric motor section, 3b
...Rotor, 6...Crankshaft, 13a...Mounting board, 13c...Opening, 14...Oil, 13b
...Oil pipe, 13...Spring guide, 9a
... Bearing, 15 ... Coil spring, 6a ...
Eccentric part, 6c...Shaft part, 6b...Main shaft part, 6f...
...Eccentric oil groove, 6e...Shaft oil, 6g...
...Main shaft oil groove.

Claims (1)

[Claims] 1 A compression mechanism section and an electric motor section are integrated and housed in a container, and the crankshaft is driven by the rotor of the electric motor section, and the mounting base and one end are connected to the opening provided in the mounting base. a spring guide having a bent oil pipe whose other end extends into the oil stored in the container;
A coil spring is fixed to a bearing that pivotally supports the crankshaft so that the openings are coaxial, and a coil spring is provided in the oil pipe, one end of which is fixed to an end of the crankshaft, and a tip of which is immersed in the oil; An eccentric oil groove extending in the axial direction is provided on the outer periphery of the smallest eccentric portion of the eccentric portion of the crankshaft, and a shaft oil groove and a main shaft oil are provided on the outer periphery of the shaft portion and the main shaft portion facing the bearing and the main bearing, respectively. An oil supply device for a refrigerant compressor, comprising a groove connected to the eccentric oil groove.