JP2000104691A - Auxiliary bearing for scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent trouble such as assembling failure while accurately maintaining a core of an auxiliary bearing at the time of sport-welding the auxiliary bearing to a body casing of a sealed vessel by forming at least one slit for releasing the stress deflection at the time of welding in the auxiliary bearing of a scroll compressor. SOLUTION: An auxiliary bearing 6A is formed with three slits 62, 62, 63 from the periphery 61 abutting on the inner wall of a barrel casing toward a core with 120 degree of angle in relation to the core. The auxiliary bearing 6A of a scroll compressor is spot-welded to the body casing in the periphery at positions between each slit 62. At the time of welding the auxiliary bearing 6A to the body casing, the stress deflection thereof can be released to each slit 62. With this structure, the core of the auxiliary bearing 6A can be accurately maintained without generating the deformation or inclination of the auxiliary bearing 6A, and trouble such as assembling failure, increase of power consumption and generation of noise can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary bearing for a scroll compressor, and more particularly, to a secondary bearing for supporting one end of a rotating shaft of an electric element of a scroll compressor used for refrigeration and air conditioners. It is about.

[0002]

2. Description of the Related Art Conventionally, when a main bearing and a sub-bearing for supporting a rotating shaft of an electric element of a scroll compressor used for a refrigerator and an air conditioner are spot-welded to an airtight container, a body casing and one bearing are connected. After positioning, welding is performed to secure a gap between the stator and the rotor, and after positioning the center of both bearings, another bearing is welded to secure coaxiality between the two bearings (Japanese Patent Laid-Open No. 8-128396). After positioning the centers of the two bearings, a method of welding the two bearings to secure the coaxiality of the two bearings (Japanese Patent Application No. 9-345434) is performed. However, since the auxiliary bearing is usually made of a disc-shaped material, the auxiliary bearing is easily deformed or tilted due to stress distortion when the auxiliary bearing is spot-welded to the fuselage casing of the sealed container, and the shaft core is There is a risk of deviation. If the axis of the sub-bearing is displaced, problems such as poor assembly, increased friction and increased power consumption, and noise may occur.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for spot-welding the sub-bearing to a body casing of an airtight container without deforming or tilting due to stress distortion during welding. Therefore, it is an object of the present invention to provide a sub-bearing of a scroll compressor which does not cause problems such as defective assembly, increased power consumption and noise.

[0004]

According to a first aspect of the present invention, there is provided an electric motor, a scroll compression element driven by a rotating shaft of the electric element, and the closed container. A scroll bearing having a main bearing and a sub-bearing which is spot-welded to the fuselage casing and rotatably supports the rotary shaft, at least one notch is provided in the sub-bearing of the scroll compressor to release stress distortion at the time of welding. A sub-bearing of a scroll compressor characterized by the following.

According to a second aspect of the present invention, in the auxiliary bearing according to the first aspect, the auxiliary bearing has a required length and width from an outer periphery in contact with an inner wall of the body casing toward an axis, and has a thickness direction. Characterized in that at least one notch penetrating through is provided.

According to a third aspect of the present invention, in the auxiliary bearing according to the second aspect, the width of the notch is 0.1 mm or more as long as the strength of the auxiliary bearing is not impaired.

According to a fourth aspect of the present invention, in the auxiliary bearing according to any one of the first to third aspects, the auxiliary bearing has a required area from an outer periphery in contact with an inner wall of the body casing to an axis. And at least one notch formed of a through hole penetrating in the thickness direction.

According to a fifth aspect of the present invention, in the auxiliary bearing according to any one of the first to fourth aspects, the notch doubles as a refrigerant gas passage and / or a lubricating oil return passage. Features.

[0009]

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 an explanatory view for explaining a situation in which a main bearing and a sub-bearing for supporting a rotary shaft of an electric element of a scroll compressor are spot-welded to a body casing, and FIG. 2 is an example of an assembled scroll compressor. is there. FIG. 3A is an explanatory plan view of an auxiliary bearing showing one embodiment of the present invention, and FIG. 3B is a central longitudinal sectional view thereof. FIG. 4A is an explanatory plan view of a sub bearing showing another embodiment of the present invention, and FIG. 4B is a longitudinal sectional view at the center thereof. FIG. 5A is an explanatory plan view of a sub bearing showing another embodiment of the present invention, and FIG. 5B is a longitudinal sectional view at the center thereof.

First, one main bearing 5 is inserted and attached to a lower end of the body casing 1 in which the stator 2 is inserted in advance by using a bearing assembling apparatus 20. Next, a plurality of gap gauges 10 for securing an appropriate gap between the inner diameter of the stator 2 and the outer diameter of the rotor 3 are inserted inside the stator 2 using the gap gauge device 30, and the rotor 3 is rotated outside. The shaft 4 is inserted into the main bearing 5. Then, the auxiliary bearing 6 is fixed at the assembly position of the electric element by using the bearing positioning device 40 that matches the bearing center of the main bearing 5 with the other auxiliary bearing 6 at the assembly position, and then the welding mechanism 50 is used. Then, the body casing 1 is welded to the bearings 5 and 6 simultaneously or continuously from a plurality of positions on the outer peripheral side of the body casing 1. After the welding is completed, the gap element 10 is removed from the body casing 1 by the gap gauge device 30 to complete the electric element assembly.

FIG. 2 is a sectional view of a scroll compressor assembled by assembling the electric element 7 and the scroll compression element 8 integrally in a closed vessel 9. When the operation of the scroll compressor configured as described above is started, the refrigerant gas is drawn into the outer peripheral portion of the scroll compression element 8 from a suction pipe (not shown), and is compressed by gradually moving to the center. The lubricating oil is discharged from the discharge port provided at the center of the upper part of the element 8 into the closed container 9, and the accompanying lubricating oil is separated, pulsation is reduced, and discharged from the discharge pipe 11 to the outside.

An auxiliary bearing 6A showing an embodiment of the auxiliary bearing 6 of the scroll type compressor according to the present invention has an outer periphery 61 which is in contact with the inner wall of the body casing 1 as shown in FIGS. 3 (A) and 3 (B). , A total of three notches 62, 62, 62 are provided every 120 ° from the axis toward the axis.
The notch 62 has a length up to the outer periphery 64 of the sub-bearing 63 and is provided so as to penetrate in the thickness direction of the sub-bearing 6A. 65 denotes a refrigerant gas passage, and 66 denotes a lubricating oil return passage.

4 (A) and 4 (B), another auxiliary bearing 6B of the scroll type compressor according to the present invention has an outer periphery 61 which is in contact with the inner wall of the fuselage casing 1 and extends from the outer periphery 61 toward the axis. A total of four notches 62, 62, 6 every 90 °
2, 62 are provided. The notch 62 is for the auxiliary bearing 6
3 has a length up to the outer periphery 64, and is provided so as to penetrate in the thickness direction of the auxiliary bearing 6B. The notch 62 also serves as a refrigerant gas passage and a lubricating oil return passage.

The spots where the auxiliary bearings 6A and 6B of the scroll type compressor according to the present invention shown in FIGS. 3 and 4 are spot-welded to the fuselage casing 1 are located between the notches 62 on the outer periphery, and preferably between the notches 62. There is no particular limitation as long as it is near the center between them. When welding the auxiliary bearings 6A and 6B to the fuselage casing 1, the stress and strain can be released to each notch 62, so that the auxiliary bearings 6A and 6B are not deformed or tilted. The shaft center can be maintained with high accuracy.
The number, length, width, and the like of the notches 62 are the body casing 1
When welding the auxiliary bearings 6A and 6B to the second bearing, there is no particular limitation as long as the stress and strain can be released.
Depending on the material of the auxiliary bearings 6A and 6B, when welding the auxiliary bearings 6A and 6B to the fuselage casing 1, the stress distortion caused by the compression received from the fuselage casing 1 is several μm to one hundred and several μm.
The notch width is 6
The thickness is preferably 0.1 mm or more as long as the strength of A and 6B is not impaired.

5 (A) and 5 (B), another auxiliary bearing 6C of the scroll type compressor according to the present invention includes an outer peripheral portion 61 contacting an inner wall of the body casing 1 and an outer peripheral portion 64 of an auxiliary bearing portion 63.
The notch 62A, which has a required area in between and has a through hole penetrating in the thickness direction, is formed at 90 ° with respect to the axis.
A total of four are provided every other. The notch 62A also serves as a refrigerant gas passage and a lubricating oil return passage.

The spot where the auxiliary bearing 6C of the scroll type compressor of the present invention shown in FIG. 5 is spot-welded to the fuselage casing 1 may be located at each of the notches 62A on the outer periphery or between the notches 62A. It is particularly preferably near the center between the notches 62A, particularly preferably between the notches 62A. When the auxiliary bearing 6C is welded to the fuselage casing 1, the stress and strain can be released to each notch 62A, so that the auxiliary bearing 6C is not deformed or tilted.
The axis of C can be maintained with high accuracy. The number, area, shape, and the like of the notches 62A are not particularly limited as long as the stress distortion can be released when the auxiliary bearing 6C is welded to the body casing 1.

In the above description of the auxiliary bearing of the scroll compressor of the present invention, the vertical type scroll compressor has been described. However, the auxiliary bearing of the scroll compressor of the present invention is not limited to this vertical type. In addition, the present invention can be applied to a sub-bearing of a horizontal scroll compressor or another type of scroll compressor.

[0018]

The auxiliary bearing of the scroll compressor according to the present invention is:
When spot welding to the fuselage casing of an airtight container, it is not deformed or tilted due to stress distortion during welding, and the axis of the sub-bearing can be maintained with high accuracy, resulting in poor assembly and increased power consumption. No problems such as noise and noise.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a situation in which a main bearing and a sub bearing that support a rotating shaft of an electric element of a scroll compressor are spot-welded to a body casing.

FIG. 2 is an example of an assembled scroll compressor.

FIG. 3A is an explanatory plan view of a sub-bearing showing one embodiment of the present invention, and FIG. 3B is a central longitudinal sectional view thereof.

FIG. 4 (A) is an explanatory plan view of a sub bearing showing another embodiment of the present invention, and FIG. 4 (B) is a longitudinal sectional view at the center thereof.

FIG. 5 (A) is an explanatory plan view of a sub bearing showing another embodiment of the present invention, and FIG. 5 (B) is a longitudinal sectional view at the center thereof.

[Explanation of symbols]

 4 Rotary shaft 5 Main bearing 6, 6A, 6B, 6C Secondary bearing 7 Electric element 8 Scroll compression element 9 Sealed container 62, 62A Notch

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H02K 15/16 H02K 15/16 B (72) Inventor Kazugi Sugimoto ▲ Ki ▼ 2 Keihan Motodori, Moriguchi-shi, Osaka 5-5-5 Sanyo Electric Co., Ltd. (72) Inventor Takehiro Nishikawa 2-5-5 Sanyo Electric Co., Ltd. (72) Inventor Kazuaki Fujiwara Keihan Moriguchi, Osaka 2-5-5 Hondori F-term (reference) in Sanyo Electric Co., Ltd. 3H029 AA01 AA02 AA14 AA15 AB03 BB03 BB11 BB21 BB31 BB32 BB33 BB42 BB44 CC01 CC04 CC17 CC22 CC23 3H039 AA01 AA02 AA03 AA04 BB03 BB28 CC11 CC19 CC26 CC27 CC33 CC34 5H605 BB07 CC04 EB08 GG02 5H607 BB01 BB14 CC01 FF07 GG01 GG29 JJ04 5H615 BB01 BB14 PP01 PP25 SS16

Claims (5)

[Claims] 1. An electric element in a closed container, a scroll compression element driven by a rotating shaft of the electric element, a main bearing and a secondary bearing which are spot-welded to a body casing of the closed container to support the rotating shaft. A sub-bearing of the scroll compressor comprising a bearing and at least one notch for releasing stress distortion during welding. 2. A notch having a required length and width from an outer periphery in contact with an inner wall of the body casing toward an axis, and having at least one notch penetrating in a thickness direction. Item 6. The auxiliary bearing according to Item 1. 3. The auxiliary bearing according to claim 2, wherein the width of the notch is 0.1 mm or more as long as the strength of the auxiliary bearing is not impaired. 4. A notch having a required area between an outer periphery in contact with an inner wall of the body casing and an axis and having a through hole penetrating in a thickness direction. The auxiliary bearing according to any one of claims 1 to 3, wherein the auxiliary bearing is provided. 5. The auxiliary bearing according to claim 1, wherein the notch doubles as a refrigerant gas passage and / or a lubricating oil return passage.