JPH10318170A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a vibration transferred to a sealed case, by fixing and supporting a supporting member in a compression mechanism on an inner wall of the sealed case by spot welding, providing a plurality of low-rigid areas circumferentially on the wall, and positioning all spot welding parts in the low-rigid areas. SOLUTION: A supporting bracket 27 is fixed and supported on an inner wall of a sealed case 1 by spot welding P1. Three spot welding parts P1 are positioned circumferentially in low-rigid areas D of the supporting bracket 27. The low-rigid areas D are formed by drilling three oil dropping holes 31 as through holes in the supporting bracket 27 along circumferentially with the same interval. The vibration generated during the operation is partially released by transformation of the supporting bracket 27 which is a supporting member of a compression mechanism by the low-rigid areas D. Thus, vibration transferring force transferred from spot welding points to the sealed case 1 is balanced at three points and is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a compressor.

[0002]

2. Description of the Related Art In general, in a compressor of an air conditioner, a compression mechanism is incorporated in a closed case, and the compression mechanism is fixedly supported on the inner wall surface of the closed case by spot welding.

[0003]

The compression mechanism is spot-welded to the inner wall surface of the closed case, for example, at three locations in the circumferential direction at regular intervals. Since the spot weld is a conduction path connecting the compression mechanism and the sealed case, the vibration generated in the compression mechanism is transmitted to the sealed case via the spot weld, which causes vibration noise. It is a thing.

[0004] Therefore, an object of the present invention is to provide a compressor in which vibration transmitted to a sealed case is suppressed to be small.

[0005]

In order to achieve the above object, the present invention relates to a compressor having a compression mechanism disposed in a closed case, wherein a support member of the compression mechanism is provided on an inner wall surface of the closed case. While fixedly supported by spot welding, on the support member of the compression mechanism, a plurality of low rigidity regions are provided in the circumferential direction, all the spot welds,
It is located within the low rigidity area.

According to such a compressor, the vibration generated during operation is partially released by the deformation of the support member of the compression mechanism due to the low rigidity region, so that the vibration transmission force transmitted from the spot welding position to the closed case is small. Can be suppressed.

In this case, as a support member for the compression mechanism having the low rigidity region, a support bracket formed separately, a main bearing member or an auxiliary bearing member constituting the compression mechanism, or a cylinder-to-cylinder partition. There is a divider. Further, the low rigidity region is formed by a through hole penetrating vertically. Alternatively, a thin wall shape is used. Alternatively, it is formed by inserting a material having low rigidity into the opening.

Further, it is desirable that the low-rigidity regions are arranged substantially evenly in the circumferential direction so that the transmission force applied to the spot welding position and the thermal deformation during the spot welding are balanced.

The position of the spot weld is desirably substantially at the center of the low-rigidity area or at the area of the partition that divides the through-hole forming the low-rigidity area into two.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a sealed case of a compressor 3, and a motor unit 5 is provided in the sealed case 1.
And a compression mechanism 7 are provided. Motor unit 5
A stator 9 fixed to the inner wall surface of the closed case 1;
The rotor 13 is fixed to the shaft 11. When a current flows through the stator 9, rotational power is applied to the shaft 11 via the rotor 13.

The compression mechanism 7 comprises a first cylinder 15 and a second cylinder 17 through which the shaft 11 penetrates. The first and second cylinders 15 and 17 are partitioned by a partition plate 19. Each is independent.

The shaft 11 is rotatably supported at both ends by a main bearing member 21 and a sub-bearing member 23. The main bearing member 21 is together with the first cylinder 15, and the sub-bearing member 23 is together with the second cylinder 17. The main bearing member 21 and the auxiliary bearing member 23 are integrally connected and fixed by mounting bolts 25 inserted from the side of the auxiliary bearing member 23.

The first cylinder 15 is integrally connected and fixed by a fixing bolt 29 and a support bracket 27 which is a support member fixedly supported on the inner wall surface of the closed case 1 by spot welding P1.

As shown in FIG. 2, the position of the spot welding P1 of the support bracket 27 is three in the circumferential direction, and is located within the low rigidity region D of the support bracket 27.

The low-rigidity area D is formed by providing three oil drain holes 31 as through holes in the support bracket 27 at substantially equal intervals along the circumferential direction.

The position of the spot weld P1 is desirably provided on the center line X of the low rigidity region D as shown in FIG. 3, but the position of the spot weld P1 is not required to be on the center line X of the low rigidity region D. Good. Further, the low-rigidity regions D do not necessarily have to be at equal intervals.

In this embodiment, as shown in FIG. 8, a partition 33 for dividing the oil drain hole 31 into two parts is provided, and a spot welding part P1 is provided in the area of the partition 33. It is also possible.

4 to 7 show another embodiment of the low rigidity area D. FIG. That is, FIG. 4 shows that the support bracket 27 is provided with a thin portion 35 (oblique line) extending radially from the center portion outside the oil drain hole 31, and the low rigidity region D is formed by the thin shape.

The low-rigidity areas D are provided at three places at substantially equal intervals, and it is desirable to provide the position of the spot welding P1 on the center line X of the low-rigidity area D as shown in FIG. In this case, the position of the spot weld P1 may not be on the center line X of the low rigidity region D. Further, the low-rigidity regions D do not necessarily have to be at equal intervals.

FIG. 6 shows that the support bracket 27 is provided with an opening 37 outside the oil drain hole 31 and a material 39 such as a synthetic resin having low rigidity is inserted into the opening 37 to form a low rigidity area D.
Is formed.

The low-rigidity areas D are provided at substantially equal intervals in three places, and it is desirable that the position of the spot welding P1 be provided on the center line X of the low-rigidity area D as shown in FIG. In this case, the position of the spot weld P1 may not be on the center line X of the low rigidity region D. Further, the low-rigidity regions D do not necessarily have to be at equal intervals.

On the other hand, the shaft 11 has the first and second
180 corresponding to the cylinders 15 and 17
The eccentric shaft portions 41, 41 whose phases are shifted by degrees are provided. The first and second cylinders 1 are provided on the eccentric shaft portions 41, 41.
The first roller 43 and the second roller 45 disposed in the eccentric shaft portions 4 and 5 are fitted to each other.
The rotation of 1, 41 gives an eccentric rotation 180 degrees out of phase.

The main bearing member 21 and the sub-bearing member 23 are provided with discharge ports 49, 49 communicating with a discharge pipe 47 whose inlet faces the inside of the sealed case 1. In addition, the first and second cylinders 15 and 17 are constantly in contact with suction ports 53 and 53 communicating with the suction pipe 51 and the outer peripheral surfaces of the rollers 43 and 45 by urging means 55 such as springs. A blade 57 (one not shown) is provided, and a compression chamber 59 is formed by the rollers 43 and 45 and the blade 57 to compress the working gas from the suction pipe 51.

According to the compressor 3 configured as described above, the working gas sucked from the suction port 53 is compressed in the compression chamber 59 and discharged from the discharge port 49.

The vibration generated during this operation is partially released by the deformation of the support bracket 27 serving as a support member of the compression mechanism 7 due to the low rigidity region D. Therefore, FIG.
As shown by the solid line, the vibration transmitting force transmitted from the spot welding positions 1, 2, 3 to the sealed case 1 can be suppressed to a small value.

In this case, the transmission force transmitted to the sealed case 1 is balanced at three points, and the maximum value is reduced by about 30%.

Incidentally, the dotted line shows the experimental results in which spot welding positions were provided inside the low rigidity area D and outside the low rigidity area D, and the spot welding position was outside the low rigidity area D. It can be seen that a large vibration transmitting force is transmitted to the closed case 1 at the spot welding position 3 in FIG.

Therefore, as shown in FIG. 10, in the present invention in which all the spot welding positions are provided in the low-rigidity region D, a large vibration reduction as shown by the solid line is obtained as compared with the conventional case shown by the one-point region. Was done.

The support member of the compression mechanism 7 for spot welding P1 on the inner wall surface of the closed case 1 is not specified by the support bracket 27.

For example, as shown in FIG.
1 is extended to the inner wall surface of the closed case 1, and the extended portion is spot-welded P1 to fix and support the compression mechanism 7.
As shown in FIG. 12, the position of the spot welding P1 may be provided in the low rigidity region D formed by the oil drain hole 31.

Alternatively, as shown in FIG. 13, the first cylinder 15 is extended to the inner wall surface of the sealed case 1 and the extended portion is spot-welded P1 to fix and support the compression mechanism 7 while the spot welding P1 is formed. As shown in FIG. 14, the position may be provided in the low rigidity region D formed by the oil drain hole 31.

Alternatively, as shown in FIG. 15, a partition plate 19 for partitioning the first cylinder 15 and the second cylinder 17 is extended to the inner wall surface of the sealed case 1, and the extended portion is spot-welded P1 to form a compression mechanism. 7 may be fixedly supported, and the position of the spot weld P1 may be provided in the low rigidity region D formed by the oil bleed hole 31 as shown in FIG.

Alternatively, as shown in FIG. 17, the auxiliary bearing member 23 is extended to the inner wall surface of the sealed case 1, the extended portion is spot-welded P1, and the compression mechanism 7 is fixed and supported, while the position of the spot weld P1 is set. 18 may be provided in the low rigidity region D formed by the oil drain hole 31 as shown in FIG.

Thus, the same operation and effect as in FIG. 1 can be expected.

[0036]

As described above, according to the compressor of the present invention, it is possible to prevent the vibration generated in the compression mechanism from being transmitted to the closed case by the spot welding provided in the low rigidity region. And vibration noise can be reduced.

The transmission force applied to the spot welding position is balanced by the low-rigidity regions provided at substantially equal intervals, so that a large vibration and noise reduction effect can be obtained, and the heat of the cylinder, blade, etc. by the spot welding can be obtained. Since the deformation is evenly balanced, the effect of improving the reliability is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a compressor according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram of a part where a spot welding position is provided on a center line of a low rigidity area.

FIG. 4 is a cross-sectional view similar to FIG. 2 in which a low-rigidity region is formed by a thin shape.

FIG. 5 is an explanatory view similar to FIG. 3 in which a spot welding position is provided on the center line of the low rigidity area in FIG. 4;

FIG. 6 is a cross-sectional view similar to FIG. 2 in which a material having low rigidity is inserted into an opening to form a low rigidity region.

FIG. 7 is an explanatory view similar to FIG. 3, in which a spot welding position is provided on the center line of the low rigidity area in FIG. 6;

FIG. 8 is an explanatory view similar to FIG. 2, in which a spot welding position is provided in a region of a partition part that divides an oil drain hole into two parts.

FIG. 9 is an explanatory diagram showing a transmission force from each spot weld to a sealed case.

FIG. 10 is an explanatory view showing a vibration reduction effect according to the present invention.

FIG. 11 is a schematic explanatory view similar to FIG. 1 in which a support member of a compression mechanism for spot welding is used as a main bearing member.

FIG. 12 is a sectional view taken along line BB of FIG. 11;

FIG. 13 shows a supporting member of a compression mechanism for spot welding.
FIG. 2 is a schematic explanatory view similar to FIG. 1 as a first cylinder.

FIG. 14 is a sectional view taken along line CC of FIG. 13;

FIG. 15 shows a supporting member of a compression mechanism for spot welding.
FIG. 2 is a schematic explanatory view similar to FIG. 1 as a partition plate.

FIG. 16 is a sectional view taken along line DD of FIG. 15;

FIG. 17 shows a supporting member of a compression mechanism for spot welding.
FIG. 2 is a schematic explanatory view similar to FIG. 1 as an auxiliary bearing member.

FIG. 18 is a sectional view taken along line EE of FIG. 17;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sealing case 7 Compression mechanism part 27 Support member (support bracket) P1 Spot welding D Low rigidity area

Claims (8)

[Claims] 1. A compressor in which a compression mechanism is disposed in a closed case, wherein a support member of the compression mechanism is fixedly supported on an inner wall surface of the closed case by spot welding, and a support member of the compression mechanism is provided. In addition, multiple low-rigidity areas are provided in the circumferential direction, and all spot welds are
A compressor located in the low rigidity region. 2. The support member of the compression mechanism portion having the low rigidity region is a support bracket formed separately, a main bearing member or an auxiliary bearing member constituting the compression mechanism portion, or a partition plate separating cylinders and cylinders. The compressor according to claim 1, wherein 3. The compressor according to claim 1, wherein the low-rigidity region is a through hole vertically penetrated. 4. The compressor according to claim 1, wherein the low-rigidity region has a thin-walled shape. 5. The compressor according to claim 1, wherein the low-rigidity region is formed by inserting a low-rigidity material into the opening. 6. The compressor according to claim 1, wherein the low-rigidity regions are arranged substantially uniformly in a circumferential direction. 7. The compressor according to claim 1, wherein the position of the spot weld is substantially at the center of the low rigidity region. 8. The compressor according to claim 1, wherein the position of the spot welding portion is a region of a partition portion that divides a through hole forming a low rigidity region into two.