JP2000080994A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently supply lubricating oil to a bearing, and perform a stable operation for a long period by drilling a hole on a bearing plate of an auxiliary supporting frame for covering a bearing perpendicular to a rotary shaft, and filling coolant gas of high pressure including lubricating oil into the bearing via the hole. SOLUTION: A hole 30 is drilled on a bearing plate 29 of an auxiliary supporting frame 22 for covering a bearing 23 perpendicular to a rotary shaft 7. Coolant gas of high pressure including lubricating oil is filled into the bearing 23 via the hole 30 opened to a bearing plate 29 of the auxiliary supporting frame 22. Lubricating oil is sufficiently lubricated on the sliding part of the ball bearing, a scroll compressor is stably operated for a long period, and thereby, reliability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor mounted on, for example, an air conditioner or a refrigerator, and more particularly, to a plurality of scroll compressors formed by meshing a fixed scroll and an orbiting scroll. The present invention relates to a scroll compressor in which a compressed gas compressed in a compression chamber is discharged into a closed container and then discharged outside the closed container.

[0002]

2. Description of the Related Art Conventionally, as a scroll type compressor used in a refrigeration cycle of an air conditioner or the like, a system in which high-pressure refrigerant gas compressed by a scroll compression element is discharged into a closed container and then discharged outside the closed container. The pressure between the back surface of the orbiting scroll and the support frame is made lower than the high pressure (for example, 15 to 25 kg / cm ² ) in the closed container, and the end of the rotary shaft is rotated by utilizing this differential pressure. The lubricating oil contained in the closed container is sucked up from an oil supply section provided on the supporting sub-bearing section, and supplied to each sliding section such as a support frame via an oil passage provided in the rotating shaft. A scroll type compressor, a trochoid pump at the tip of the refueling section,
A positive displacement pump such as a rotary pump or a reciprocating pump is connected, and the positive displacement pump supplies the lubricating oil b contained in the closed container to the sliding portion such as a support frame via the oil passage. There is a scroll compressor that is supplied. A sub-bearing portion that supports the end of the rotary shaft is supported by a sub-support frame, and a bearing is interposed between the sub-support frame and the rotary shaft. However, the lubricating oil is not sufficiently supplied to the bearing, and the lubrication of the sliding portion of the ball bearing becomes insufficient, which may cause a serious problem such as stopping the scroll compressor.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide lubricating oil contained in a sealed container from a lubrication section provided on a sub-bearing portion for supporting an end of a rotating shaft. Scroll compressor that supplies high pressure refrigerant gas compressed by a scroll compression element into a closed container and then discharges it out of the closed container, using it by supplying it to each sliding part through an oil passage and circulating it. And a highly reliable scroll-type compressor capable of sufficiently supplying lubricating oil to a bearing interposed between the sub-support frame and a rotary shaft, and capable of operating stably for a long period of time. That is.

[0004]

According to a first aspect of the present invention, there is provided an electric element, a scroll compression element driven by a rotating shaft of the electric element, Lubricating oil contained in a closed container,
A sub-support frame provided with a sub-bearing portion that supports the end of the rotary shaft, a bearing interposed between the sub-support frame and the rotary shaft, and a refueling portion provided in the sub-bearing portion. A scroll compressor that supplies and circulates lubricating oil from the oil supply unit to each sliding unit through an oil passage provided in the rotary shaft, and uses the lubricating oil in a manner substantially orthogonal to the rotary shaft. A scroll type compressor wherein a plurality of holes are formed in a bearing plate of the sub-support frame that covers a bearing, and high-pressure refrigerant gas containing lubricating oil enters the bearing through the holes.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings shown in FIGS. FIG. 1 is a cross-sectional view showing the overall configuration of the scroll compressor of the present invention. FIG. 2 is an enlarged explanatory view of a sub-support frame, bearings, and the like of the scroll compressor shown in FIG. FIG.
FIG. 2 is a plan view of a sub-support frame of the scroll compressor shown in FIG. 1.

[0006] The compressor shown in FIG. 1 is a scroll type compressor 1 having a closed container 2 formed in a cylindrical shape with both ends closed. An electric element 3 and a scroll compression element 4 driven by the electric element 3 are accommodated in the closed container 2.

The electric element 3 has a stator 5 fixed inside the closed casing 2, and a rotor 6 located at the center of the stator 5, and the center of the rotor 6 has a shaft of the closed casing 2. A rotating shaft 7 oriented in the direction of the center is connected in a penetrating state, and one end of the rotating shaft 7 is penetrated through the center of a support frame 8 that supports the scroll compression element 4 and is rotatably supported. Here, the support frame 8 is fixedly connected to the inner wall surface of the closed container 2. The rotary shaft 7 is rotatably supported at one end on a halfway portion by a bearing 9 of a support frame 8, and the rotor 6 is supported on the inner wall surface side of the sealed container 2 via the rotary shaft 7 and the support frame 8. Have been.

Further, the rotating shaft 7 penetrating the support frame 8
A pin portion (crank portion) 10 whose center is provided eccentrically with respect to the axis of the rotating shaft 7 is formed at the end of the shaft. An orbiting scroll 11 is connected to the pin portion 10. The orbiting scroll 11 has a boss hole portion 12 connected to the center of one side surface of the disc-shaped end plate by inserting a pin portion 10 and a spiral wrap 13 formed on the other side surface of the end plate. A fixed scroll 14 is connected to the support frame 8. The fixed scroll 14 has a spiral wrap 16 which is alternately positioned on the wrap 13 of the orbiting scroll 11 and forms a plurality of compression chambers 15.

A suction pipe 17 for the refrigerant gas penetrating through the closed casing 2 is connected to the side wall surface of the fixed scroll 14. At the center of the fixed scroll 14, a discharge port 18 for discharging the compressed refrigerant gas into the closed container 2 is provided. In addition, the suction side of the scroll compression element 4 for the refrigerant gas sucked from the suction pipe 17, the back surface of the orbiting scroll 11 (the surface on the side where the boss hole portion 12 of the end plate is located) and the support frame 8 swing. Since the scroll 11 is communicated with the peripheral edge of the end plate, the pressure during this period is almost as low as the refrigerant gas suction side, and lower than the pressure in the closed vessel 2.

The other end of the rotary shaft 7 has a differential pressure type lubrication unit 19.
Is provided. The oil supply section 19 is mounted in the closed container 2, supports one end of the rotating shaft 7, and has a sub-support frame 2 provided with an auxiliary bearing section 21 to which an oil introduction pipe 20 is mounted.
2 is provided. A bearing 23 is interposed between the auxiliary support frame 22 and the rotating shaft 7, and a receiving portion 24 of the bearing 23 is provided on the auxiliary bearing portion 21.

An oil passage 25 is formed in the rotating shaft 7 from one end to the other end. Rotating shaft 7
A small hole 26 communicating with the sliding surface of the bearing portion 9 from the oil passage 25 near the electric element 3 side of the portion supported by the bearing portion 9
Is provided. A helical groove 27 starting from the outlet of the small hole 26 and communicating with the small hole 26 on the surface of the rotating shaft 7 toward the pin portion 10 is formed in a portion where the rotating shaft 7 is supported by the bearing 9. It is provided halfway. The lubricating oil from one end of the rotating shaft 7 gas seals the sliding surface between the boss hole 12 and the pin portion 10, and the lubricating oil passing through the small hole 26 flows through the groove 27 to lubricate the sliding surface. Along with
The sliding surface on the pin portion 10 side from the small hole 26 is gas-sealed.

The sealed container 2 contains lubricating oil b to a predetermined level.
The lubricating oil b is sucked up from the oil introduction pipe 20 of the differential pressure type oil supply unit 19 by the above-mentioned differential pressure, passes through the oil passage 25 in the rotary shaft 7, and includes the respective sliding parts including the bearing part 9. To be used for circulation.

Then, as shown in FIGS. 2 and 3,
The bearing plate 29 of the sub-support frame 22 that covers the bearing 23 at right angles to the rotating shaft 7 has three holes 3.
0, 30, and 30 are open. The number, shape, and arrangement of the holes 30 are not particularly limited as long as the high-pressure refrigerant gas containing the lubricating oil enters the bearing 23 through the holes 30 and the lubricating oil can sufficiently lubricate the sliding portions of the ball bearings.
Reference numeral 31 denotes a bolt 32
33 is a hole for passing wirings, 34 is a hole for use when magnetizing a magnet, and 35 is a hole for inserting the rotating shaft 7. .

When the operation of the scroll type compressor 1 of the present invention having the above-described structure is started, the refrigerant gas is supplied to the suction pipe 17.
Is sucked into the outer peripheral portion of the scroll compression element 4 and gradually compressed toward the center to be compressed.
The lubricating oil discharged from the discharge port 18 provided at the center of the container 4 into the closed container 2 is separated in this space, and pulsation is reduced. The discharged gas flows through a passage (not shown) provided in the fixed scroll 14 and the support frame 8 as shown by a white arrow, goes to the electric element 3 side, and receives the centrifugal force due to the rotation of the rotor 6 and the stator 5 and the auxiliary support frame 22 The lubricating oil in the refrigerant gas is further separated by the baffle plate effect, etc.
The refrigerant gas from which the lubricating oil has been separated is discharged out of the closed vessel 2 from the discharge pipe 28. The separated lubricating oil flows as shown by the black arrows, accumulates at the bottom of the closed container 2, and is circulated for use. Then, as shown in FIG. 2, a plurality of holes 30 formed in the bearing plate 29 of the sub-support frame 22 by the high-pressure refrigerant gas containing the lubricating oil from the direction shown by the arrow.
, The lubricating oil sufficiently lubricates the sliding portion of the ball bearing, so that the scroll type compressor 1 of the present invention can be operated stably for a long period of time and has high reliability.

In the above description of the scroll type compressor of the present invention, the horizontal type scroll compressor of which the lubrication system is the differential pressure type has been described. However, the scroll type compressor of the present invention is of the horizontal type. It is not limited to vertical-type scroll compressors with lubrication method of differential pressure, horizontal-type or vertical-type scroll compressors with lubrication method using pumps, and other types of scroll-type compressors. Is also applicable.

[0016]

According to the scroll compressor of the present invention, high-pressure refrigerant gas containing lubricating oil enters the bearing through a plurality of holes formed in the bearing plate of the sub-support frame, and the lubricating oil flows into the sliding portion of the ball bearing. Sufficient lubrication for long-term stable operation and high reliability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an overall configuration of an embodiment of a scroll compressor according to the present invention.

FIG. 2 is an enlarged explanatory view of a sub-support frame, a bearing, and the like of the scroll compressor shown in FIG.

FIG. 3 is a plan view of a sub-support frame of the scroll compressor shown in FIG.

[Explanation of symbols]

 b Lubricating oil 1 Scroll compressor of the present invention 2 Closed vessel 3 Electric element 4 Scroll compression element 7 Rotating shaft 19 Oil supply unit 21 Secondary bearing unit 22 Secondary support frame 23 Bearing 25 Oil passage 29 Bearing plate 30 Hole

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takehiro Nishikawa 2-5-1-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Takashi Sato 2-chome, Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Kazuaki Fujiwara 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3H029 AA02 AA12 AA15 AB03 BB01 BB06 CC01 CC04 CC17 CC22 CC33 CC34 3H039 AA02 AA03 AA06 AA12 BB11 CC19 CC27 CC33 CC34 CC42 CC44

Claims (1)

[Claims] 1. An electric element in a closed container, a scroll compression element driven by a rotating shaft of the electric element, a lubricating oil contained in the closed container, and an end of the rotating shaft. A sub-support frame having a sub-bearing portion, a bearing interposed between the sub-support frame and the rotating shaft, and an oil supply portion provided in the auxiliary bearing portion, wherein lubricating oil is supplied from the oil supply portion. A scroll type compressor which supplies and circulates to each sliding portion via an oil passage provided in a rotating shaft and is used, wherein the bearing plate of the sub-support frame covers the bearing substantially orthogonal to the rotating shaft. Wherein a plurality of holes are formed in the scroll compressor so that high-pressure refrigerant gas containing lubricating oil enters the bearings through the holes.