JP2679480B2 - Scroll 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 scroll type electric compressor used as a refrigerant compressor or an air compressor for refrigeration and air conditioning.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3 , a compressor of this type has a stator 104 and a rotor inside a sealed container 101.
An electric motor 103 composed of 105 and a compression mechanism 102 are arranged.
Have been. The rotor 105 is a horizontally arranged club.
Is connected to the link shaft 106 and transmits power to the compression mechanism 102.
You. Further, the lower part of the closed container 101 is a lubricating oil reservoir 107.

The compression mechanism 102 has a fixed scroll blade member 11 in which a fixed scroll blade 109 is integrally formed on a fixed frame body 108.
0, and a swirling spiral blade member 113 in which swirling spiral blades 111 that mesh with the fixed spiral blades 109 to form a plurality of compression work spaces 114 are formed on a swirl end plate 112.
The rotation end plate 1 has a rotation restraining member 115 that prevents the rotation of the swirling spiral blade member 113 and only rotates.
The swirl drive shaft 116 provided on the opposite side of the swirl spiral blade 111 of the spindle 12 is a main shaft 1 formed at one end of the crankshaft 106.
The crankshaft 106 has a main bearing member 120 having a main bearing 119 for supporting the main shaft 117 and an end of the crankshaft 106 on the side opposite to the main shaft. Rolling type secondary bearing 1
It is supported by 21.

Refrigerant gas sucked from the suction pipe 122 of the compressor enters from the suction port 123 of the compression mechanism 102, is compressed in the compression work space 114, and flows from the discharge port 124 through the electric motor side passage 125 to the discharge chamber 126. It is discharged to the outside of the compressor through the discharge pipe 127 (JP-A-1-170779).

[0005]

In the conventional compressor described above, the rotor 10 is supported by supporting the crankshaft 106 at both ends.
5, the main bearing 119 receives almost no moment, and the crankshaft 10
The moment to bend 6 is small, and the reliability can be improved.

However, the rolling type bearing has a big problem that vibration and abnormal noise are generated due to axial vibration and resonance.

In view of the above problems, the present invention has a high-performance scroll which improves vibration and noise characteristics of a scroll compressor.
The purpose is to provide a compressor.

[0008]

As means for solving the above-mentioned problems, an electric motor and a compression mechanism driven by this electric motor are provided inside a closed container, and the compression mechanism is fixed to a fixed frame body. A fixed swirl vane member forming a swirl vane, a swirl swirl vane member formed on a swirl end plate with swirl swirl vanes meshing with the fixed swirl vane to form a plurality of working spaces, and rotation of the swirl swirl vane member. A rotation restraining member that prevents only the turning and that only turns, a crankshaft that drives the turning spiral blade member to turn, and a main bearing member that has a main bearing that supports the main shaft formed on the crankshaft. Do not support the rolling auxiliary bearing that supports the end of the crankshaft opposite to the main shaft and the crankshaft.
A rolling type auxiliary bearing that secures a clearance between the bearing and the shaft.
And a partition member fixed to the inner wall of the closed container by adjoining
And fixed in place, and elastic parts are placed between the inner rings of these bearings.
Then, elastic force is applied to the inner ring.

[0009]

The above-described operation of the present invention has the effect that the crankshaft is not supported by the auxiliary bearing but only by the auxiliary bearing, and elastic parts are arranged between the inner rings of these bearings to preload the inner ring with elastic force. As a result, it is possible to prevent abnormal noise and the like generated from the auxiliary bearing due to vibration and resonance in the axial direction of the shaft system, and it is possible to avoid problems such as axial misalignment of both rolling bearings that occur during assembly .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A scroll compressor according to an embodiment of the present invention will be described below with reference to the drawings.

[0011] First, FIG. 1, be describes the embodiment Nitsu <br/> of the present invention. In the drawing, the interior of the sealed container 1, the solid
An electric motor 3 including a stator 4 and a rotor 5 and a compression mechanism 2 are provided.
Have been. The rotor 5 is a clan arranged almost horizontally.
It is connected to the shaft 6 and transmits power to the compression mechanism 2. 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 in which a fixed spiral blade 9 is integrally formed on a fixed frame body 8, and a swirl spiral blade which meshes with the fixed spiral blade 9 to form a plurality of compression work spaces 14. A swirl spiral blade member 13 having a swirl end plate 12 formed on the swirl end plate 12, and a rotation restraining member 15 for preventing only the swirl of the swirl spiral blade member 13 to rotate and only to swirl the swirl spiral blade member of the swirl end plate 12. The turning drive shaft 16 provided on the side opposite to 11 is fitted into an eccentric bearing 18 provided inside a main shaft 17 formed at one end of the crank shaft 6, and the crank shaft 6 supports the main shaft 17. It is supported by a main bearing member 20 having a bearing 19 and a partition member 21 having an auxiliary bearing (rolling type radial bearing) 22 that supports the end of the crankshaft 6 opposite to the main shaft 17. The partition wall member 21 is fixed to the inner wall of the closed container 1, and a lubricating oil pump 25 driven by the crankshaft 6 is engaged with the partition wall member 21. An auxiliary bearing (rolling type radial bearing) 23 is arranged and fixed adjacent to the sub bearing 22. Between the auxiliary bearing 23 and the crankshaft
A gap 32 is secured, and the auxiliary bearing 23 supports the crankshaft 6.
I try not to accept. The auxiliary bearing 22 and the auxiliary bearing 2
A metal corrugated washer (elastic component) 24 is disposed between the inner rings of 3, and the metal corrugated washer 24 is provided by these bearings.
It has elasticity.

The refrigerant gas sucked from the suction pipe 26 of the compressor enters the compression mechanism 2 and is compressed in the compression work space 14,
From the discharge port 27 through the electric motor side passage 28, the discharge chamber 29
Is discharged to the outside of the compressor through the discharge pipe 30.

FIG . 2 shows a partially enlarged cross section of the rolling bearing.
Show. With respect to the bearing inner diameter of the auxiliary bearing 23,
The gap 32 is secured by making the shaft diameter thinner than normal fitting dimensions.
However, the crankshaft is not supported by the auxiliary bearing, only the auxiliary bearing
Is supported by.

In the above structure, the auxiliary bearing 22 and the auxiliary bearing
Elasticity of the metal corrugated washer (elastic component) 24 on the inner ring of 23
Since the force acts as a preload, the axial vibration and
To prevent abnormal noise from bearings caused by vibration and resonance.
Can be. In addition, the shaft center of both rolling bearings
The problem can be avoided and good assemblability can be secured.

In each of the above embodiments, the crankshaft is provided in the horizontal direction, but the same effect can be obtained even in a vertical scroll compressor having a vertical direction. Although the metal corrugated washer is used as the elastic member, the elastic member is not particularly limited .

[0017]

As is apparent from the above embodiment, the present invention
The effect of is that in the structure supporting both ends of the crankshaft of a scroll compressor , even if a rolling auxiliary bearing is used for supporting the end of the crankshaft on the side opposite to the compression mechanism , there is a gap between the crankshaft and the crankshaft.
Rolling type auxiliary shaft that secures the space and does not support the crankshaft
Adjacent the bearing to the sub-bearing, and place an elastic part between the inner rings of these bearings.
Disposing the product and applying elastic force as a preload to the inner ring
Depending on the axial vibration and resonance of the shaft system
It is possible to prevent abnormal noise generated from the
It is possible to avoid problems such as shaft misalignment of both rolling bearings
Realize a high-performance scroll compressor.

[Brief description of the drawings]

FIG. 1 is a sectional view of a scroll compressor showing an embodiment of the present invention.

Portion of the rolling type bearing section showing an embodiment of the present invention; FIG
Enlarged sectional view

FIG. 3 is a sectional view of a conventional scroll compressor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Compression mechanism 3 Electric motor 6 Crankshaft 8 Fixed frame body 9 Fixed spiral blade 10 Fixed spiral blade member 11 Swirling spiral blade 12 Swirling end plate 13 Swirling spiral blade member 14 Working space 15 Spinning restraint member 17 Spindle 19 Main bearing 20 Main Bearing member 21 Partition member 22 Sub bearing 23 Auxiliary bearing 24 Elastic component 32 Gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuichi Yamamoto 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Yoshinobu Kojima 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) In Yasushi Yasuba, 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Invention Masahiro Tsubogawa 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Shotaro Ito 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) References 149381 (JP, A)

Claims (1)

(57) [Claims] 1. A fixed spiral vane member, in which an electric motor and a compression mechanism driven by the electric motor are arranged inside a closed container, and the compression mechanism has a fixed spiral vane formed on a fixed frame, and the fixed spiral vane. A swirl spiral vane member formed on a swirl end plate with swirl spiral vanes meshing with the vanes to form a plurality of working spaces; and a rotation restraint member for preventing the swirl spiral vane member from rotating and only rotating. A crankshaft for driving the swirling spiral blade member to rotate, and a main shaft formed on the crankshaft.
And a main bearing member having a main bearing that supports the shaft.
The end of the crankshaft opposite to the main shaft is supported.
Do not support the rolling type auxiliary bearing and the crankshaft
A rolling-type auxiliary bearing that secures a clearance between the bearing and the shaft.
A scroll compressor which is arranged adjacent to and adjacent to a partition member fixed to the inner wall of the hermetically sealed container, and elastic parts are arranged between the inner rings of these bearings to impart an elastic force to the inner ring.