JP3147547B2 - Hermetic compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor used as a refrigerant compressor or air compressor for refrigeration and air conditioning.

[0002]

2. Description of the Related Art Conventionally, in this type of compressor, as shown in FIG. 4, a stator 104 of a motor 103 for driving a compression mechanism 102 is fixed inside a closed vessel 101, and a rotor 105 of the motor 103 is fixed. A crankshaft 106 for driving the compression mechanism 102 is connected to the crankshaft 106, and the rotation axis of the crankshaft 106 is disposed substantially horizontally. The lower part of the sealed container 101 is a lubricating oil reservoir 107.

A compression mechanism 102 is a fixed spiral blade member 110 in which a fixed spiral blade 109 is formed integrally with a fixed frame 108.
And a swirling spiral blade member 113 in which a swirling spiral blade 111 meshing with the fixed swirl blade 109 to form a plurality of compression working spaces 114 is formed on a swiveling end plate 112, and prevents the swirling spiral blade member 113 from rotating. And a turning drive shaft 11 provided on the opposite side of the swirling vanes 111 of the turning end plate 112.
6 is fitted into an eccentric bearing 118 provided inside a main shaft 117 formed at one end of the crankshaft 106, and the crankshaft 106 supports a main bearing 119 supporting the main shaft 117.
And a sub bearing 121 that supports the shaft of the crankshaft 106 on the opposite side of the main shaft. The auxiliary bearing 121 is provided with a casing 123 for providing an oil supply mechanism 122 at an end of the crankshaft 106.
24 and a trochoid pump consisting of an inner rotor 125 are mounted.
Is fitted on a pump shaft 126 formed at the end of the pump shaft 126. Further, an oil suction pipe 127 is connected to the casing 123,
The lower end of the oil suction pipe 127 is immersed in the lubricating oil reservoir 107.

On the other hand, the crankshaft 106 and the pump shaft 12
An oil feed passage 128 is formed in 6, one of which is connected to the trochoid pump, and the other is connected to each sliding portion of the compression mechanism 102.

The refrigerant sucked from the suction pipe 129 of the compressor is compressed in the compression working space 114 in the compression mechanism 102, passes through the discharge hole 130, passes through the discharge pipe 131 provided in the closed casing 101, and goes out of the compressor. Ejected (Japanese Unexamined Patent Publication No.
60092).

[0006]

In the conventional compressor described above, the pump shaft 126 is fitted on the inner rotor 125 of the trochoid pump, and the lubricating oil is used in a low viscosity state. During operation, in particular, when the compressor is laid down or when the defrosting operation is performed, bubbles of the refrigerant are generated in the lubricating oil reservoir, and when the bubbles are caught in the trochoid pump, the inner rotor 125 is vibrated by the gap. However, there is a problem that noise is generated.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a low-noise oil supply device that can be incorporated in a hermetic compressor.

[0008]

The technical means for solving the above-mentioned problems is as follows. An electric motor, a compression mechanism driven by the electric motor, and a lubricating oil reservoir are provided at the bottom in a closed container. The mechanism includes a crankshaft for transmitting the rotational force of the electric motor and a main bearing member having a main bearing for supporting the main shaft formed on the crankshaft, and an end of the crankshaft opposite to the main shaft is supported. A sub-bearing to be mounted and fixed to a partition member fixed to the inner wall of the closed container, a casing mounted to the partition member, and a gear pump in which external teeth and internal teeth are relatively eccentrically mounted in the casing. A pump shaft fitted with the internal teeth at an end of the crankshaft opposite to the main shaft, one of which is inserted and fixed in an oil feed passage formed in the pump shaft, and the other is the internal teeth. Elastic in the gap of the fitting part of the pump shaft Is that formed by providing the arranged fixed fueling device cage sandwiched.

[0009]

The operation of the technical means of the present invention described above is based on the fact that a retainer is provided which is elastically sandwiched in the gap between the internal gear of the gear pump and the pump shaft to be fitted. Vibration is prevented, and noise reduction during operation of the compressor of the oil supply device can be achieved.

[0010]

FIG. 1, FIG. 2 and FIG.
Shown in In FIG. 1, a stator 4 of an electric motor 3 for driving a compression mechanism 2 is fixed inside a closed container 1.
A crankshaft 6 for driving the compression mechanism 2 is connected to the rotor 5 of this embodiment, and the rotation axis of the crankshaft 6 is disposed substantially horizontally. The lower part of the sealed container 1 is a lubricating oil reservoir 7.

The compression mechanism 2 includes a fixed spiral blade member 10 integrally formed with a fixed spiral blade 9 on a fixed frame body 8, and a swirling spiral blade that meshes with the fixed spiral blade 9 to form a plurality of compression working spaces 14. A rotation restricting member 15 formed on the revolving head plate 12 for preventing the revolving spiral blade member 13 from rotating and performing only revolving, and provided on the opposite side of the revolving spiral blade 11 of the revolving head plate 12. The turning drive shaft 16 is fitted into an eccentric bearing 18 provided inside a main shaft 17 formed at one end of the crankshaft 6. The crankshaft 6 includes a main bearing member 20 having a main bearing 19 supporting the main shaft 17. ,
The main shaft 17 is supported by a partition member 21 having an auxiliary bearing 22 for supporting the shaft portion of the crankshaft 6 on the opposite side. The partition member 21 is fixed to the inner wall of the closed casing 1, and the auxiliary bearing 22 is disposed and fixed in a mounting hole 23 provided in the partition member 21. Also, this partition member 21
A casing 25 having a convex portion 24 fitted and inserted into the mounting hole 23, and external teeth 26 and internal teeth 2
Gear pump 28 mounted so as to be relatively eccentrically rotatable
And an end 29 of the crankshaft 6 opposite to the main shaft 17.
A pump shaft 30 fitted with the internal teeth 27, one of which is inserted and fixed in an oil feed passage 31 formed in the pump shaft 30, and the other of which is a fitting portion between the internal teeth 27 and the pump shaft 30. Is provided with a lubricating device 33 constituted by a retainer 32 elastically sandwiched in the gap.

The casing 25 has a suction port 34.
Is formed and is immersed in the lubricating oil reservoir 7, and the lubricating oil sucked by the lubricating device 33 is supplied to each part through the oil supply path 31.

[0013]

According to the present invention, an electric motor, a compression mechanism driven by the electric motor, a lubricating oil reservoir are provided at the bottom in the closed container, and the compression mechanism transmits a rotational force of the electric motor to the crankshaft and the crankshaft. And a main bearing member having a main bearing for supporting the main shaft formed in a partition member fixed to an inner wall of the closed container with a sub-bearing for supporting an end of the crankshaft opposite to the main shaft. A casing fixed to the partition member, a gear pump in which external teeth and internal teeth are relatively eccentrically mounted in the casing, and a gear pump having an end opposite to the main shaft of the crankshaft. One of the pump shafts fitted with the internal teeth is inserted and fixed in an oil supply passage formed in the pump shaft, and the other is elastically sandwiched in a gap between the internal teeth and the fitting portion of the pump shaft. An oil supply device with a cage installed and fixed Since the retainer elastically sandwiched in the gap between the internal gear of the gear pump and the pump shaft to be fitted is provided, the lubricating oil is used in a low viscosity state. During the operation of the compressor, the internal teeth are prevented from vibrating during the operation of the compressor even when bubbles of the refrigerant are generated in the lubricating oil reservoir at the time of defrosting operation or when the bubbles are caught in the trochoid pump. This has the advantage that noise can be reduced during machine operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a scroll compressor showing one embodiment of the present invention.

FIG. 2 is a sectional view of a main part of FIG. 1 showing a state of assembling the cage of the present invention.

FIG. 3 is a perspective view of the retainer of the present invention.

FIG. 4 is a sectional view of a conventional compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Compression mechanism 3 Electric motor 6 Crankshaft 7 Lubricating oil reservoir 17 Main shaft 19 Main bearing 20 Main bearing member 21 Partition member 22 Secondary bearing 25 Casing 26 External teeth 27 Internal teeth 28 Gear pump 29 End part 30 Pump shaft 31 Oil feed Road 32 Cage 33 Refueling device

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Sadao Kawahara 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Shuichi Yamamoto 1006 Odaka Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Kiyoshi Sano 1006 Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-59-60092 (JP, A) JP-A-2-27186 (JP, A) JP-A-2-86972 (JP, A) JP-A-3-122287 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04C 29/02 311 F04C 2/10 341

Claims (1)

(57) [Claims] An electric motor and a compression mechanism driven by the electric motor are disposed inside the closed container, and a lubricating oil reservoir is disposed at the bottom of the closed container, and the compression mechanism controls the rotational force of the electric motor. And a main bearing member having a main bearing for supporting the main shaft formed on the crankshaft, and a sub-bearing for supporting an end of the crankshaft opposite to the main shaft is provided on the closed container. A casing fixed to the partition member fixed to the inner wall and fixed to the partition member; a gear pump in which the external teeth and the internal teeth are relatively eccentrically mounted in the casing; A pump shaft fitted with the internal teeth at the end opposite to the main shaft, one of which is inserted and fixed in an oil feed passage formed in the pump shaft, and the other is formed of the internal teeth and the pump shaft. Elastically sandwiched in the gap between the fittings Hermetic compressor comprising providing the arranged fixed fueling device retainer that.